Add support for SIKE/p503 post-quantum KEM
Based on Microsoft's implementation available on github: Source: https://github.com/Microsoft/PQCrypto-SIDH Commit: 77044b76181eb61c744ac8eb7ddc7a8fe72f6919 Following changes has been applied * In intel assembly, use MOV instead of MOVQ: Intel instruction reference in the Intel Software Developer's Manual volume 2A, the MOVQ has 4 forms. None of them mentions moving literal to GPR, hence "movq $rax, 0x0" is wrong. Instead, on 64bit system, MOV can be used. * Some variables were wrongly zero-initialized (as per C99 spec) * Move constant values to .RODATA segment, as keeping them in .TEXT segment is not compatible with XOM. * Fixes issue in arm64 code related to the fact that compiler doesn't reserve enough space for the linker to relocate address of a global variable when used by 'ldr' instructions. Solution is to use 'adrp' followed by 'add' instruction. Relocations for 'adrp' and 'add' instructions is generated by prefixing the label with :pg_hi21: and :lo12: respectively. * Enable MULX and ADX. Code from MS doesn't support PIC. MULX can't reference global variable directly. Instead RIP-relative addressing can be used. This improves performance around 10%-13% on SkyLake * Check if CPU supports BMI2 and ADOX instruction at runtime. On AMD64 optimized implementation of montgomery multiplication and reduction have 2 implementations - faster one takes advantage of BMI2 instruction set introduced in Haswell and ADOX introduced in Broadwell. Thanks to OPENSSL_ia32cap_P it can be decided at runtime which implementation to choose. As CPU configuration is static by nature, branch predictor will be correct most of the time and hence this check very often has no cost. * Reuse some utilities from boringssl instead of reimplementing them. This includes things like: * definition of a limb size (use crypto_word_t instead of digit_t) * use functions for checking in constant time if value is 0 and/or less then * #define's used for conditional compilation * Use SSE2 for conditional swap on vector registers. Improves performance a little bit. * Fix f2elm_t definition. Code imported from MSR defines f2elm_t type as a array of arrays. This decays to a pointer to an array (when passing as an argument). In C, one can't assign const pointer to an array with non-const pointer to an array. Seems it violates 6.7.3/8 from C99 (same for C11). This problem occures in GCC 6, only when -pedantic flag is specified and it occures always in GCC 4.9 (debian jessie). * Fix definition of eval_3_isog. Second argument in eval_3_isog mustn't be const. Similar reason as above. * Use HMAC-SHA256 instead of cSHAKE-256 to avoid upstreaming cSHAKE and SHA3 code. * Add speed and unit tests for SIKE. Change-Id: I22f0bb1f9edff314a35cd74b48e8c4962568e330
This commit is contained in:
parent
5501a26915
commit
21bae6ccfb
@ -568,6 +568,7 @@ add_subdirectory(ssl/test)
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add_subdirectory(fipstools)
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add_subdirectory(tool)
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add_subdirectory(decrepit)
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add_subdirectory(third_party/sike)
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if(FUZZ)
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if(LIBFUZZER_FROM_DEPS)
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@ -406,6 +406,7 @@ add_library(
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../third_party/fiat/curve25519.c
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$<TARGET_OBJECTS:fipsmodule>
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$<TARGET_OBJECTS:sike>
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${CRYPTO_ARCH_SOURCES}
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${CRYPTO_FIPS_OBJECTS}
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75
third_party/sike/CMakeLists.txt
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75
third_party/sike/CMakeLists.txt
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@ -0,0 +1,75 @@
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cmake_minimum_required(VERSION 2.8.11)
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include_directories(../../include)
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if(UNIX)
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set(ASM_EXT S)
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enable_language(ASM)
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set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -Wa,--noexecstack")
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if(CMAKE_OSX_ARCHITECTURES MATCHES ".*arm.*")
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set(CMAKE_ASM_FLAGS "-DSIKE_TARGET_IOS")
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# CMake doesn't add -isysroot and -arch flags
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set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -isysroot \"${CMAKE_OSX_SYSROOT}\"")
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foreach(arch ${CMAKE_OSX_ARCHITECTURES})
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set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -arch ${arch}")
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endforeach()
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endif()
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else()
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set(OPENSSL_NO_ASM "1")
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endif()
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# Platform specific sources
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if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64" AND NOT OPENSSL_NO_ASM)
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set(
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SIKE_PLATFORM_SOURCES
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src/asm/fp_x64_asm.${ASM_EXT}
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)
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elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "aarch64" OR ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "arm64" AND NOT OPENSSL_NO_ASM)
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set(
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SIKE_PLATFORM_SOURCES
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src/asm/fp_arm64_asm.${ASM_EXT}
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)
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else()
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set(
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SIKE_PLATFORM_SOURCES
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src/asm/fp_generic.c
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)
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add_definitions(-DOPENSSL_NO_ASM)
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endif()
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# Compile to object files, we will link them with libssl
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add_library(
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sike
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OBJECT
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src/isogeny.c
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src/fpx.c
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src/P503.c
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src/sike.c
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${SIKE_PLATFORM_SOURCES}
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)
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target_include_directories(sike PUBLIC
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include
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)
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add_executable(
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sike_test
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src/sike_test.cc
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$<TARGET_OBJECTS:boringssl_gtest_main>
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)
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target_include_directories(sike_test PUBLIC
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include
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)
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target_link_libraries(sike_test test_support_lib boringssl_gtest crypto)
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if(WIN32)
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target_link_libraries(sike_test ws2_32)
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endif()
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21
third_party/sike/LICENSE
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21
third_party/sike/LICENSE
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@ -0,0 +1,21 @@
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MIT License
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Copyright (c) Microsoft Corporation. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE
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64
third_party/sike/include/sike/sike.h
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64
third_party/sike/include/sike/sike.h
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/********************************************************************************************
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* SIDH: an efficient supersingular isogeny cryptography library
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*
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* Abstract: API header file for SIKE
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*********************************************************************************************/
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#ifndef SIKE_H_
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#define SIKE_H_
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#include <stdint.h>
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#include <openssl/base.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* SIKEp503
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*
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* SIKE is a isogeny based post-quantum key encapsulation mechanism. Description of the
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* algorithm is provided in [SIKE]. This implementation uses 503-bit field size. The code
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* is based on "Additional_Implementations" from PQC NIST submission package which can
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* be found here:
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* https://csrc.nist.gov/CSRC/media/Projects/Post-Quantum-Cryptography/documents/round-1/submissions/SIKE.zip
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*
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* [SIKE] https://sike.org/files/SIDH-spec.pdf
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*/
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// SIKEp503_PUB_BYTESZ is the number of bytes in a public key.
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#define SIKEp503_PUB_BYTESZ 378
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// SIKEp503_PRV_BYTESZ is the number of bytes in a private key.
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#define SIKEp503_PRV_BYTESZ 32
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// SIKEp503_SS_BYTESZ is the number of bytes in a shared key.
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#define SIKEp503_SS_BYTESZ 16
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// SIKEp503_MSG_BYTESZ is the number of bytes in a random bit string concatenated
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// with the public key (see 1.4 of SIKE).
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#define SIKEp503_MSG_BYTESZ 24
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// SIKEp503_SS_BYTESZ is the number of bytes in a ciphertext.
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#define SIKEp503_CT_BYTESZ (SIKEp503_PUB_BYTESZ + SIKEp503_MSG_BYTESZ)
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// SIKE_keypair outputs a public and secret key. Internally it uses BN_rand() as
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// an entropy source. In case of success function returns 1, otherwise 0.
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OPENSSL_EXPORT int SIKE_keypair(
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uint8_t out_priv[SIKEp503_PRV_BYTESZ],
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uint8_t out_pub[SIKEp503_PUB_BYTESZ]);
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// SIKE_encaps generates and encrypts a random session key, writing those values to
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// |out_shared_key| and |out_ciphertext|, respectively.
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OPENSSL_EXPORT void SIKE_encaps(
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uint8_t out_shared_key[SIKEp503_SS_BYTESZ],
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uint8_t out_ciphertext[SIKEp503_CT_BYTESZ],
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const uint8_t pub_key[SIKEp503_PUB_BYTESZ]);
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// SIKE_decaps outputs a random session key, writing it to |out_shared_key|.
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OPENSSL_EXPORT void SIKE_decaps(
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uint8_t out_shared_key[SIKEp503_SS_BYTESZ],
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const uint8_t ciphertext[SIKEp503_CT_BYTESZ],
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const uint8_t pub_key[SIKEp503_PUB_BYTESZ],
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const uint8_t priv_key[SIKEp503_PRV_BYTESZ]);
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#ifdef __cplusplus
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}
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#endif
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#endif
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70
third_party/sike/src/P503.c
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70
third_party/sike/src/P503.c
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@ -0,0 +1,70 @@
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/********************************************************************************************
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* SIDH: an efficient supersingular isogeny cryptography library
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*
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* Abstract: supersingular isogeny parameters and generation of functions for P503
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*********************************************************************************************/
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#include "utils.h"
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// Parameters for isogeny system "SIKEp503"
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const struct params_t p503 = {
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.prime = {
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0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF, 0xABFFFFFFFFFFFFFF,
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0x13085BDA2211E7A0, 0x1B9BF6C87B7E7DAF, 0x6045C6BDDA77A4D0, 0x004066F541811E1E
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},
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.prime_p1 = {
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0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0xAC00000000000000,
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0x13085BDA2211E7A0, 0x1B9BF6C87B7E7DAF, 0x6045C6BDDA77A4D0, 0x004066F541811E1E
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},
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.prime_x2 = {
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0xFFFFFFFFFFFFFFFE, 0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF, 0x57FFFFFFFFFFFFFF,
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0x2610B7B44423CF41, 0x3737ED90F6FCFB5E, 0xC08B8D7BB4EF49A0, 0x0080CDEA83023C3C
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},
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.A_gen = {
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0xE7EF4AA786D855AF, 0xED5758F03EB34D3B, 0x09AE172535A86AA9, 0x237B9CC07D622723,
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0xE3A284CBA4E7932D, 0x27481D9176C5E63F, 0x6A323FF55C6E71BF, 0x002ECC31A6FB8773, // XPA0
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0x64D02E4E90A620B8, 0xDAB8128537D4B9F1, 0x4BADF77B8A228F98, 0x0F5DBDF9D1FB7D1B,
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0xBEC4DB288E1A0DCC, 0xE76A8665E80675DB, 0x6D6F252E12929463, 0x003188BD1463FACC, // XPA1
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0xB79D41025DE85D56, 0x0B867DA9DF169686, 0x740E5368021C827D, 0x20615D72157BF25C,
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0xFF1590013C9B9F5B, 0xC884DCADE8C16CEA, 0xEBD05E53BF724E01, 0x0032FEF8FDA5748C, // XQA0
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0x12E2E849AA0A8006, 0x41CF47008635A1E8, 0x9CD720A70798AED7, 0x42A820B42FCF04CF,
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0x7BF9BAD32AAE88B1, 0xF619127A54090BBE, 0x1CB10D8F56408EAA, 0x001D6B54C3C0EDEB, // XRA0
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0x34DB54931CBAAC36, 0x420A18CB8DD5F0C4, 0x32008C1A48C0F44D, 0x3B3BA772B1CFD44D,
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0xA74B058FDAF13515, 0x095FC9CA7EEC17B4, 0x448E829D28F120F8, 0x00261EC3ED16A489 // XRA1
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},
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.B_gen = {
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0x7EDE37F4FA0BC727, 0xF7F8EC5C8598941C, 0xD15519B516B5F5C8, 0xF6D5AC9B87A36282,
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0x7B19F105B30E952E, 0x13BD8B2025B4EBEE, 0x7B96D27F4EC579A2, 0x00140850CAB7E5DE, // XPB0
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0x7764909DAE7B7B2D, 0x578ABB16284911AB, 0x76E2BFD146A6BF4D, 0x4824044B23AA02F0,
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0x1105048912A321F3, 0xB8A2E482CF0F10C1, 0x42FF7D0BE2152085, 0x0018E599C5223352, // XPB1
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0x4256C520FB388820, 0x744FD7C3BAAF0A13, 0x4B6A2DDDB12CBCB8, 0xE46826E27F427DF8,
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0xFE4A663CD505A61B, 0xD6B3A1BAF025C695, 0x7C3BB62B8FCC00BD, 0x003AFDDE4A35746C, // XQB0
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0x75601CD1E6C0DFCB, 0x1A9007239B58F93E, 0xC1F1BE80C62107AC, 0x7F513B898F29FF08,
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0xEA0BEDFF43E1F7B2, 0x2C6D94018CBAE6D0, 0x3A430D31BCD84672, 0x000D26892ECCFE83, // XRB0
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0x1119D62AEA3007A1, 0xE3702AA4E04BAE1B, 0x9AB96F7D59F990E7, 0xF58440E8B43319C0,
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0xAF8134BEE1489775, 0xE7F7774E905192AA, 0xF54AE09308E98039, 0x001EF7A041A86112 // XRB1
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},
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.mont_R2 = {
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0x5289A0CF641D011F, 0x9B88257189FED2B9, 0xA3B365D58DC8F17A, 0x5BC57AB6EFF168EC,
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0x9E51998BD84D4423, 0xBF8999CBAC3B5695, 0x46E9127BCE14CDB6, 0x003F6CFCE8B81771
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},
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.mont_one = {
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0x00000000000003F9, 0x0000000000000000, 0x0000000000000000, 0xB400000000000000,
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0x63CB1A6EA6DED2B4, 0x51689D8D667EB37D, 0x8ACD77C71AB24142, 0x0026FBAEC60F5953
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},
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.A_strat = {
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61, 32, 16, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1, 8, 4, 2, 1, 1, 2, 1, 1,
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4, 2, 1, 1, 2, 1, 1, 16, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1, 8, 4, 2, 1,
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1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1, 29, 16, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1,
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1, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1, 13, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2,
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1, 1, 2, 1, 1, 5, 4, 2, 1, 1, 2, 1, 1, 2, 1, 1, 1
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},
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.B_strat = {
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71, 38, 21, 13, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1, 5, 4, 2, 1, 1, 2, 1,
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1, 2, 1, 1, 1, 9, 5, 3, 2, 1, 1, 1, 1, 2, 1, 1, 1, 4, 2, 1, 1, 1, 2, 1, 1, 17, 9,
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5, 3, 2, 1, 1, 1, 1, 2, 1, 1, 1, 4, 2, 1, 1, 1, 2, 1, 1, 8, 4, 2, 1, 1, 1, 2, 1,
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1, 4, 2, 1, 1, 2, 1, 1, 33, 17, 9, 5, 3, 2, 1, 1, 1, 1, 2, 1, 1, 1, 4, 2, 1, 1, 1,
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2, 1, 1, 8, 4, 2, 1, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1, 16, 8, 4, 2, 1, 1, 1, 2,
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1, 1, 4, 2, 1, 1, 2, 1, 1, 8, 4, 2, 1, 1, 2, 1, 1, 4, 2, 1, 1, 2, 1, 1
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}
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};
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841
third_party/sike/src/asm/fp_arm64_asm.S
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841
third_party/sike/src/asm/fp_arm64_asm.S
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//*******************************************************************************************
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// SIDH: an efficient supersingular isogeny cryptography library
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//
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// Abstract: field arithmetic in 64-bit ARMv8 assembly for P503 on Linux
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//*******************************************************************************************
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// On APPLE use cdecl calling convention
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#if defined(__APPLE__)
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.section __TEXT,__const
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#define cdecl(s) _##s
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#else
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.section .rodata
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#define cdecl(s) s
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#endif
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.p503p1_nz_s8:
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.quad 0x085BDA2211E7A0AC, 0x9BF6C87B7E7DAF13
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.quad 0x45C6BDDA77A4D01B, 0x4066F541811E1E60
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.p503x2:
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.quad 0xFFFFFFFFFFFFFFFE, 0xFFFFFFFFFFFFFFFF
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.quad 0x57FFFFFFFFFFFFFF, 0x2610B7B44423CF41
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.quad 0x3737ED90F6FCFB5E, 0xC08B8D7BB4EF49A0
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.quad 0x0080CDEA83023C3C
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.text
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// Mach-O and ELF use different syntax for relocations. Note
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// that we require :pg_hi21: to be explicitly listed. It is normally
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// optional with adrp instructions.
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.macro LOADV DST, SRC
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#if defined(SIKE_TARGET_IOS)
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adrp \DST, \SRC@PAGE
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add \DST, \DST, \SRC@PAGEOFF
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#else
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// :pg_hi21: is optional and default with adrp. It also breaks
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// compilation on older Clang. Hence it is not listed here
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adrp \DST, \SRC
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add \DST, \DST, :lo12:\SRC
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#endif
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.endm
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//***********************************************************************
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// Field addition
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// Operation: c [x2] = a [x0] + b [x1]
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//***********************************************************************
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.global cdecl(sike_fpadd)
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.align 4
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cdecl(sike_fpadd):
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ldp x3, x4, [x0,#0]
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ldp x5, x6, [x0,#16]
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ldp x11, x12, [x1,#0]
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ldp x13, x14, [x1,#16]
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// Add a + b
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adds x3, x3, x11
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adcs x4, x4, x12
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adcs x5, x5, x13
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adcs x6, x6, x14
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ldp x7, x8, [x0,#32]
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ldp x9, x10, [x0,#48]
|
||||
ldp x15, x16, [x1,#32]
|
||||
ldp x17, x18, [x1,#48]
|
||||
adcs x7, x7, x15
|
||||
adcs x8, x8, x16
|
||||
adcs x9, x9, x17
|
||||
adc x10, x10, x18
|
||||
|
||||
// Subtract 2xp503
|
||||
LOADV x18, .p503x2
|
||||
ldp x11, x12, [x18, #0]
|
||||
ldp x13, x14, [x18, #16]
|
||||
subs x3, x3, x11
|
||||
sbcs x4, x4, x12
|
||||
sbcs x5, x5, x12
|
||||
sbcs x6, x6, x13
|
||||
sbcs x7, x7, x14
|
||||
|
||||
ldp x15, x16, [x18, #32]
|
||||
ldr x17, [x18, #48]
|
||||
sbcs x8, x8, x15
|
||||
sbcs x9, x9, x16
|
||||
sbcs x10, x10, x17
|
||||
sbc x18, xzr, xzr
|
||||
|
||||
// Add 2xp503 anded with the mask in x18
|
||||
and x11, x11, x18
|
||||
and x12, x12, x18
|
||||
and x13, x13, x18
|
||||
and x14, x14, x18
|
||||
and x15, x15, x18
|
||||
and x16, x16, x18
|
||||
and x17, x17, x18
|
||||
|
||||
adds x3, x3, x11
|
||||
adcs x4, x4, x12
|
||||
adcs x5, x5, x12
|
||||
adcs x6, x6, x13
|
||||
adcs x7, x7, x14
|
||||
adcs x8, x8, x15
|
||||
adcs x9, x9, x16
|
||||
adc x10, x10, x17
|
||||
|
||||
stp x3, x4, [x2,#0]
|
||||
stp x5, x6, [x2,#16]
|
||||
stp x7, x8, [x2,#32]
|
||||
stp x9, x10, [x2,#48]
|
||||
ret
|
||||
|
||||
|
||||
//***********************************************************************
|
||||
// Field subtraction
|
||||
// Operation: c [x2] = a [x0] - b [x1]
|
||||
//***********************************************************************
|
||||
.global cdecl(sike_fpsub)
|
||||
.align 4
|
||||
cdecl(sike_fpsub):
|
||||
ldp x3, x4, [x0,#0]
|
||||
ldp x5, x6, [x0,#16]
|
||||
ldp x11, x12, [x1,#0]
|
||||
ldp x13, x14, [x1,#16]
|
||||
|
||||
// Subtract a - b
|
||||
subs x3, x3, x11
|
||||
sbcs x4, x4, x12
|
||||
sbcs x5, x5, x13
|
||||
sbcs x6, x6, x14
|
||||
ldp x7, x8, [x0,#32]
|
||||
ldp x9, x10, [x0,#48]
|
||||
ldp x15, x16, [x1,#32]
|
||||
ldp x17, x18, [x1,#48]
|
||||
sbcs x7, x7, x15
|
||||
sbcs x8, x8, x16
|
||||
sbcs x9, x9, x17
|
||||
sbcs x10, x10, x18
|
||||
sbc x18, xzr, xzr
|
||||
|
||||
// Add 2xp503 anded with the mask in x18
|
||||
LOADV x19, .p503x2
|
||||
ldp x11, x12, [x19, #0]
|
||||
ldp x13, x14, [x19, #16]
|
||||
and x11, x11, x18
|
||||
and x12, x12, x18
|
||||
and x13, x13, x18
|
||||
and x14, x14, x18
|
||||
ldp x15, x16, [x19, #32]
|
||||
ldr x17, [x19, #48]
|
||||
and x15, x15, x18
|
||||
and x16, x16, x18
|
||||
and x17, x17, x18
|
||||
|
||||
adds x3, x3, x11
|
||||
adcs x4, x4, x12
|
||||
adcs x5, x5, x12
|
||||
adcs x6, x6, x13
|
||||
adcs x7, x7, x14
|
||||
adcs x8, x8, x15
|
||||
adcs x9, x9, x16
|
||||
adc x10, x10, x17
|
||||
|
||||
stp x3, x4, [x2,#0]
|
||||
stp x5, x6, [x2,#16]
|
||||
stp x7, x8, [x2,#32]
|
||||
stp x9, x10, [x2,#48]
|
||||
ret
|
||||
|
||||
|
||||
//////////////////////////////////////////// MACRO
|
||||
.macro MUL128_COMBA_CUT A0, A1, B0, B1, C0, C1, C2, C3, T0
|
||||
mul \A0, \A1, \B0
|
||||
umulh \B0, \A1, \B0
|
||||
adds \C1, \C1, \C3
|
||||
adc \C2, \C2, xzr
|
||||
|
||||
mul \T0, \A1, \B1
|
||||
umulh \B1, \A1, \B1
|
||||
adds \C1, \C1, \A0
|
||||
adcs \C2, \C2, \B0
|
||||
adc \C3, xzr, xzr
|
||||
|
||||
adds \C2, \C2, \T0
|
||||
adc \C3, \C3, \B1
|
||||
.endm
|
||||
|
||||
|
||||
//////////////////////////////////////////// MACRO
|
||||
.macro MUL256_KARATSUBA_COMBA M,A0,A1,A2,A3,B0,B1,B2,B3,C0,C1,C2,C3,C4,C5,C6,C7,T0,T1
|
||||
|
||||
// A0-A1 <- AH + AL, T0 <- mask
|
||||
adds \A0, \A0, \A2
|
||||
adcs \A1, \A1, \A3
|
||||
adc \T0, xzr, xzr
|
||||
|
||||
// C6, T1 <- BH + BL, C7 <- mask
|
||||
adds \C6, \B0, \B2
|
||||
adcs \T1, \B1, \B3
|
||||
adc \C7, xzr, xzr
|
||||
|
||||
// C0-C1 <- masked (BH + BL)
|
||||
sub \C2, xzr, \T0
|
||||
sub \C3, xzr, \C7
|
||||
and \C0, \C6, \C2
|
||||
and \C1, \T1, \C2
|
||||
|
||||
// C4-C5 <- masked (AH + AL), T0 <- combined carry
|
||||
and \C4, \A0, \C3
|
||||
and \C5, \A1, \C3
|
||||
mul \C2, \A0, \C6
|
||||
mul \C3, \A0, \T1
|
||||
and \T0, \T0, \C7
|
||||
|
||||
// C0-C1, T0 <- (AH+AL) x (BH+BL), part 1
|
||||
adds \C0, \C4, \C0
|
||||
umulh \C4, \A0, \T1
|
||||
adcs \C1, \C5, \C1
|
||||
umulh \C5, \A0, \C6
|
||||
adc \T0, \T0, xzr
|
||||
|
||||
// C2-C5 <- (AH+AL) x (BH+BL), low part
|
||||
MUL128_COMBA_CUT \A0, \A1, \C6, \T1, \C2, \C3, \C4, \C5, \C7
|
||||
ldp \A0, \A1, [\M,#0]
|
||||
|
||||
// C2-C5, T0 <- (AH+AL) x (BH+BL), final part
|
||||
adds \C4, \C0, \C4
|
||||
umulh \C7, \A0, \B0
|
||||
umulh \T1, \A0, \B1
|
||||
adcs \C5, \C1, \C5
|
||||
mul \C0, \A0, \B0
|
||||
mul \C1, \A0, \B1
|
||||
adc \T0, \T0, xzr
|
||||
|
||||
// C0-C1, T1, C7 <- AL x BL
|
||||
MUL128_COMBA_CUT \A0, \A1, \B0, \B1, \C0, \C1, \T1, \C7, \C6
|
||||
|
||||
// C2-C5, T0 <- (AH+AL) x (BH+BL) - ALxBL
|
||||
mul \A0, \A2, \B2
|
||||
umulh \B0, \A2, \B2
|
||||
subs \C2, \C2, \C0
|
||||
sbcs \C3, \C3, \C1
|
||||
sbcs \C4, \C4, \T1
|
||||
mul \A1, \A2, \B3
|
||||
umulh \C6, \A2, \B3
|
||||
sbcs \C5, \C5, \C7
|
||||
sbc \T0, \T0, xzr
|
||||
|
||||
// A0, A1, C6, B0 <- AH x BH
|
||||
MUL128_COMBA_CUT \A2, \A3, \B2, \B3, \A0, \A1, \C6, \B0, \B1
|
||||
|
||||
// C2-C5, T0 <- (AH+AL) x (BH+BL) - ALxBL - AHxBH
|
||||
subs \C2, \C2, \A0
|
||||
sbcs \C3, \C3, \A1
|
||||
sbcs \C4, \C4, \C6
|
||||
sbcs \C5, \C5, \B0
|
||||
sbc \T0, \T0, xzr
|
||||
|
||||
adds \C2, \C2, \T1
|
||||
adcs \C3, \C3, \C7
|
||||
adcs \C4, \C4, \A0
|
||||
adcs \C5, \C5, \A1
|
||||
adcs \C6, \T0, \C6
|
||||
adc \C7, \B0, xzr
|
||||
.endm
|
||||
|
||||
|
||||
//***********************************************************************************
|
||||
// 512-bit integer multiplication using Karatsuba (two levels), Comba (lower level)
|
||||
// Operation: c [x2] = a [x0] * b [x1]
|
||||
//***********************************************************************************
|
||||
.global cdecl(sike_mpmul)
|
||||
.align 4
|
||||
cdecl(sike_mpmul):
|
||||
sub sp, sp, #96
|
||||
stp x19, x20, [sp,#0]
|
||||
stp x21, x22, [sp,#16]
|
||||
stp x23, x24, [sp,#32]
|
||||
stp x25, x26, [sp,#48]
|
||||
stp x27, x28, [sp,#64]
|
||||
str x29, [sp, #80]
|
||||
|
||||
ldp x3, x4, [x0]
|
||||
ldp x5, x6, [x0,#16]
|
||||
ldp x7, x8, [x0,#32]
|
||||
ldp x9, x10, [x0,#48]
|
||||
ldp x11, x12, [x1,#0]
|
||||
ldp x13, x14, [x1,#16]
|
||||
ldp x15, x16, [x1,#32]
|
||||
ldp x17, x18, [x1,#48]
|
||||
|
||||
// x26-x29 <- AH + AL, x7 <- mask
|
||||
adds x26, x3, x7
|
||||
adcs x27, x4, x8
|
||||
adcs x28, x5, x9
|
||||
adcs x29, x6, x10
|
||||
adc x7, xzr, xzr
|
||||
|
||||
// x11-x14 <- BH + BL, x8 <- mask
|
||||
adds x11, x11, x15
|
||||
adcs x12, x12, x16
|
||||
adcs x13, x13, x17
|
||||
adcs x14, x14, x18
|
||||
adc x8, xzr, xzr
|
||||
|
||||
// x15-x18 <- masked (BH + BL)
|
||||
sub x9, xzr, x7
|
||||
sub x10, xzr, x8
|
||||
and x15, x11, x9
|
||||
and x16, x12, x9
|
||||
and x17, x13, x9
|
||||
and x18, x14, x9
|
||||
|
||||
// x19-x22 <- masked (AH + AL), x7 <- combined carry
|
||||
and x19, x26, x10
|
||||
and x20, x27, x10
|
||||
and x21, x28, x10
|
||||
and x22, x29, x10
|
||||
and x7, x7, x8
|
||||
|
||||
// x15-x18, x7 <- masked (AH+AL) + masked (BH+BL), step 1
|
||||
adds x15, x15, x19
|
||||
adcs x16, x16, x20
|
||||
adcs x17, x17, x21
|
||||
adcs x18, x18, x22
|
||||
adc x7, x7, xzr
|
||||
|
||||
// x8-x10,x19-x23 <- (AH+AL) x (BH+BL), low part
|
||||
stp x26, x27, [x2,#0]
|
||||
MUL256_KARATSUBA_COMBA x2, x26, x27, x28, x29, x11, x12, x13, x14, x8, x9, x10, x19, x20, x21, x22, x23, x24, x25
|
||||
|
||||
// x15-x18, x7 <- (AH+AL) x (BH+BL), final step
|
||||
adds x15, x15, x20
|
||||
adcs x16, x16, x21
|
||||
adcs x17, x17, x22
|
||||
adcs x18, x18, x23
|
||||
adc x7, x7, xzr
|
||||
|
||||
// x20-x27 <- AL x BL
|
||||
ldp x11, x12, [x1,#0]
|
||||
ldp x13, x14, [x1,#16]
|
||||
MUL256_KARATSUBA_COMBA x0, x3, x4, x5, x6, x11, x12, x13, x14, x20, x21, x22, x23, x24, x25, x26, x27, x28, x29
|
||||
|
||||
// x13-x14, x3-x5 <- (AH+AL) x (BH+BL) - ALxBL
|
||||
subs x8, x8, x20
|
||||
sbcs x9, x9, x21
|
||||
sbcs x10, x10, x22
|
||||
sbcs x19, x19, x23
|
||||
sbcs x15, x15, x24
|
||||
sbcs x16, x16, x25
|
||||
sbcs x17, x17, x26
|
||||
sbcs x18, x18, x27
|
||||
sbc x7, x7, xzr
|
||||
|
||||
stp x20, x21, [x2]
|
||||
stp x22, x23, [x2,#16]
|
||||
|
||||
ldp x3, x4, [x0,#32]
|
||||
ldp x5, x6, [x0,#48]
|
||||
ldp x11, x12, [x1,#32]
|
||||
ldp x13, x14, [x1,#48]
|
||||
|
||||
adds x8, x8, x24
|
||||
adcs x9, x9, x25
|
||||
adcs x10, x10, x26
|
||||
adcs x19, x19, x27
|
||||
adc x1, xzr, xzr
|
||||
|
||||
// x20-x27 <- AH x BH
|
||||
add x0, x0, #32
|
||||
MUL256_KARATSUBA_COMBA x0, x3, x4, x5, x6, x11, x12, x13, x14, x20, x21, x22, x23, x24, x25, x26, x27, x28, x29
|
||||
neg x1, x1
|
||||
|
||||
// x13-x14, x3-x5 <- (AH+AL) x (BH+BL) - ALxBL - AHxBH
|
||||
subs x8, x8, x20
|
||||
sbcs x9, x9, x21
|
||||
sbcs x10, x10, x22
|
||||
sbcs x19, x19, x23
|
||||
sbcs x15, x15, x24
|
||||
sbcs x16, x16, x25
|
||||
sbcs x17, x17, x26
|
||||
sbcs x18, x18, x27
|
||||
sbc x7, x7, xzr
|
||||
|
||||
stp x8, x9, [x2,#32]
|
||||
stp x10, x19, [x2,#48]
|
||||
|
||||
adds x1, x1, #1
|
||||
adcs x15, x15, x20
|
||||
adcs x16, x16, x21
|
||||
adcs x17, x17, x22
|
||||
adcs x18, x18, x23
|
||||
adcs x24, x7, x24
|
||||
adcs x25, x25, xzr
|
||||
adcs x26, x26, xzr
|
||||
adc x27, x27, xzr
|
||||
|
||||
stp x15, x16, [x2,#64]
|
||||
stp x17, x18, [x2,#80]
|
||||
stp x24, x25, [x2,#96]
|
||||
stp x26, x27, [x2,#112]
|
||||
|
||||
ldp x19, x20, [sp,#0]
|
||||
ldp x21, x22, [sp,#16]
|
||||
ldp x23, x24, [sp,#32]
|
||||
ldp x25, x26, [sp,#48]
|
||||
ldp x27, x28, [sp,#64]
|
||||
ldr x29, [sp,#80]
|
||||
add sp, sp, #96
|
||||
ret
|
||||
|
||||
|
||||
//////////////////////////////////////////// MACRO
|
||||
.macro MUL128x256_COMBA_CUT A0, A1, B0, B1, B2, B3, C0, C1, C2, C3, C4, C5, T0, T1, T2, T3
|
||||
mul \T0, \A1, \B0
|
||||
umulh \T1, \A1, \B0
|
||||
adds \C1, \C1, \C3
|
||||
adc \C2, \C2, xzr
|
||||
|
||||
mul \T2, \A0, \B2
|
||||
umulh \T3, \A0, \B2
|
||||
adds \C1, \C1, \T0
|
||||
adcs \C2, \C2, \T1
|
||||
adc \C3, xzr, xzr
|
||||
|
||||
mul \T0, \A1, \B1
|
||||
umulh \T1, \A1, \B1
|
||||
adds \C2, \C2, \T2
|
||||
adcs \C3, \C3, \T3
|
||||
adc \C4, xzr, xzr
|
||||
|
||||
mul \T2, \A0, \B3
|
||||
umulh \T3, \A0, \B3
|
||||
adds \C2, \C2, \T0
|
||||
adcs \C3, \C3, \T1
|
||||
adc \C4, \C4, xzr
|
||||
|
||||
mul \T0, \A1, \B2
|
||||
umulh \T1, \A1, \B2
|
||||
adds \C3, \C3, \T2
|
||||
adcs \C4, \C4, \T3
|
||||
adc \C5, xzr, xzr
|
||||
|
||||
mul \T2, \A1, \B3
|
||||
umulh \T3, \A1, \B3
|
||||
adds \C3, \C3, \T0
|
||||
adcs \C4, \C4, \T1
|
||||
adc \C5, \C5, xzr
|
||||
adds \C4, \C4, \T2
|
||||
adc \C5, \C5, \T3
|
||||
.endm
|
||||
|
||||
|
||||
//**************************************************************************************
|
||||
// Montgomery reduction
|
||||
// Based on method described in Faz-Hernandez et al. https://eprint.iacr.org/2017/1015
|
||||
// Operation: mc [x1] = ma [x0]
|
||||
// NOTE: ma=mc is not allowed
|
||||
//**************************************************************************************
|
||||
.global cdecl(sike_fprdc)
|
||||
.align 4
|
||||
cdecl(sike_fprdc):
|
||||
sub sp, sp, #96
|
||||
stp x19, x20, [sp]
|
||||
stp x21, x22, [sp, #16]
|
||||
stp x23, x24, [sp, #32]
|
||||
stp x25, x26, [sp, #48]
|
||||
stp x27, x28, [sp, #64]
|
||||
stp x29, x30, [sp, #80]
|
||||
|
||||
ldp x2, x3, [x0,#0] // a[0-1]
|
||||
|
||||
// Load the prime constant
|
||||
LOADV x23, .p503p1_nz_s8
|
||||
ldp x24, x25, [x23, #0]
|
||||
ldp x26, x27, [x23, #16]
|
||||
|
||||
// a[0-1] x p503p1_nz_s8 --> result: x4:x9
|
||||
mul x4, x2, x24 // a[0] x p503p1_nz_s8[0]
|
||||
umulh x7, x2, x24
|
||||
mul x5, x2, x25 // a[0] x p503p1_nz_s8[1]
|
||||
umulh x6, x2, x25
|
||||
MUL128x256_COMBA_CUT x2, x3, x24, x25, x26, x27, x4, x5, x6, x7, x8, x9, x28, x29, x30, x10
|
||||
|
||||
ldp x3, x11, [x0,#16] // a[2]
|
||||
ldp x12, x13, [x0,#32]
|
||||
ldp x14, x15, [x0,#48]
|
||||
|
||||
orr x10, xzr, x9, lsr #8
|
||||
lsl x9, x9, #56
|
||||
orr x9, x9, x8, lsr #8
|
||||
lsl x8, x8, #56
|
||||
orr x8, x8, x7, lsr #8
|
||||
lsl x7, x7, #56
|
||||
orr x7, x7, x6, lsr #8
|
||||
lsl x6, x6, #56
|
||||
orr x6, x6, x5, lsr #8
|
||||
lsl x5, x5, #56
|
||||
orr x5, x5, x4, lsr #8
|
||||
lsl x4, x4, #56
|
||||
|
||||
adds x11, x4, x11 // a[3]
|
||||
adcs x12, x5, x12 // a[4]
|
||||
adcs x13, x6, x13
|
||||
adcs x14, x7, x14
|
||||
adcs x15, x8, x15
|
||||
ldp x16, x17, [x0,#64]
|
||||
ldp x18, x19, [x0,#80]
|
||||
mul x4, x3, x24 // a[2] x p503p1_nz_s8[0]
|
||||
umulh x7, x3, x24
|
||||
adcs x16, x9, x16
|
||||
adcs x17, x10, x17
|
||||
adcs x18, xzr, x18
|
||||
adcs x19, xzr, x19
|
||||
ldp x20, x21, [x0,#96]
|
||||
ldp x22, x23, [x0,#112]
|
||||
mul x5, x3, x25 // a[2] x p503p1_nz_s8[1]
|
||||
umulh x6, x3, x25
|
||||
adcs x20, xzr, x20
|
||||
adcs x21, xzr, x21
|
||||
adcs x22, xzr, x22
|
||||
adc x23, xzr, x23
|
||||
|
||||
// a[2-3] x p503p1_nz_s8 --> result: x4:x9
|
||||
MUL128x256_COMBA_CUT x3, x11, x24, x25, x26, x27, x4, x5, x6, x7, x8, x9, x28, x29, x30, x10
|
||||
|
||||
orr x10, xzr, x9, lsr #8
|
||||
lsl x9, x9, #56
|
||||
orr x9, x9, x8, lsr #8
|
||||
lsl x8, x8, #56
|
||||
orr x8, x8, x7, lsr #8
|
||||
lsl x7, x7, #56
|
||||
orr x7, x7, x6, lsr #8
|
||||
lsl x6, x6, #56
|
||||
orr x6, x6, x5, lsr #8
|
||||
lsl x5, x5, #56
|
||||
orr x5, x5, x4, lsr #8
|
||||
lsl x4, x4, #56
|
||||
|
||||
adds x13, x4, x13 // a[5]
|
||||
adcs x14, x5, x14 // a[6]
|
||||
adcs x15, x6, x15
|
||||
adcs x16, x7, x16
|
||||
mul x4, x12, x24 // a[4] x p503p1_nz_s8[0]
|
||||
umulh x7, x12, x24
|
||||
adcs x17, x8, x17
|
||||
adcs x18, x9, x18
|
||||
adcs x19, x10, x19
|
||||
adcs x20, xzr, x20
|
||||
mul x5, x12, x25 // a[4] x p503p1_nz_s8[1]
|
||||
umulh x6, x12, x25
|
||||
adcs x21, xzr, x21
|
||||
adcs x22, xzr, x22
|
||||
adc x23, xzr, x23
|
||||
|
||||
// a[4-5] x p503p1_nz_s8 --> result: x4:x9
|
||||
MUL128x256_COMBA_CUT x12, x13, x24, x25, x26, x27, x4, x5, x6, x7, x8, x9, x28, x29, x30, x10
|
||||
|
||||
orr x10, xzr, x9, lsr #8
|
||||
lsl x9, x9, #56
|
||||
orr x9, x9, x8, lsr #8
|
||||
lsl x8, x8, #56
|
||||
orr x8, x8, x7, lsr #8
|
||||
lsl x7, x7, #56
|
||||
orr x7, x7, x6, lsr #8
|
||||
lsl x6, x6, #56
|
||||
orr x6, x6, x5, lsr #8
|
||||
lsl x5, x5, #56
|
||||
orr x5, x5, x4, lsr #8
|
||||
lsl x4, x4, #56
|
||||
|
||||
adds x15, x4, x15 // a[7]
|
||||
adcs x16, x5, x16 // a[8]
|
||||
adcs x17, x6, x17
|
||||
adcs x18, x7, x18
|
||||
mul x4, x14, x24 // a[6] x p503p1_nz_s8[0]
|
||||
umulh x7, x14, x24
|
||||
adcs x19, x8, x19
|
||||
adcs x20, x9, x20
|
||||
adcs x21, x10, x21
|
||||
mul x5, x14, x25 // a[6] x p503p1_nz_s8[1]
|
||||
umulh x6, x14, x25
|
||||
adcs x22, xzr, x22
|
||||
adc x23, xzr, x23
|
||||
|
||||
// a[6-7] x p503p1_nz_s8 --> result: x4:x9
|
||||
MUL128x256_COMBA_CUT x14, x15, x24, x25, x26, x27, x4, x5, x6, x7, x8, x9, x28, x29, x30, x10
|
||||
|
||||
orr x10, xzr, x9, lsr #8
|
||||
lsl x9, x9, #56
|
||||
orr x9, x9, x8, lsr #8
|
||||
lsl x8, x8, #56
|
||||
orr x8, x8, x7, lsr #8
|
||||
lsl x7, x7, #56
|
||||
orr x7, x7, x6, lsr #8
|
||||
lsl x6, x6, #56
|
||||
orr x6, x6, x5, lsr #8
|
||||
lsl x5, x5, #56
|
||||
orr x5, x5, x4, lsr #8
|
||||
lsl x4, x4, #56
|
||||
|
||||
adds x17, x4, x17
|
||||
adcs x18, x5, x18
|
||||
adcs x19, x6, x19
|
||||
adcs x20, x7, x20
|
||||
stp x16, x17, [x1,#0] // Final result
|
||||
stp x18, x19, [x1,#16]
|
||||
adcs x21, x8, x21
|
||||
adcs x22, x9, x22
|
||||
adc x23, x10, x23
|
||||
stp x20, x21, [x1,#32]
|
||||
stp x22, x23, [x1,#48]
|
||||
|
||||
ldp x19, x20, [sp]
|
||||
ldp x21, x22, [sp, #16]
|
||||
ldp x23, x24, [sp, #32]
|
||||
ldp x25, x26, [sp, #48]
|
||||
ldp x27, x28, [sp, #64]
|
||||
ldp x29, x30, [sp, #80]
|
||||
add sp, sp, #96
|
||||
ret
|
||||
|
||||
|
||||
//***********************************************************************
|
||||
// 503-bit multiprecision addition
|
||||
// Operation: c [x2] = a [x0] + b [x1]
|
||||
//***********************************************************************
|
||||
.global cdecl(sike_mpadd_asm)
|
||||
.align 4
|
||||
cdecl(sike_mpadd_asm):
|
||||
ldp x3, x4, [x0,#0]
|
||||
ldp x5, x6, [x0,#16]
|
||||
ldp x11, x12, [x1,#0]
|
||||
ldp x13, x14, [x1,#16]
|
||||
|
||||
adds x3, x3, x11
|
||||
adcs x4, x4, x12
|
||||
adcs x5, x5, x13
|
||||
adcs x6, x6, x14
|
||||
ldp x7, x8, [x0,#32]
|
||||
ldp x9, x10, [x0,#48]
|
||||
ldp x15, x16, [x1,#32]
|
||||
ldp x17, x18, [x1,#48]
|
||||
adcs x7, x7, x15
|
||||
adcs x8, x8, x16
|
||||
adcs x9, x9, x17
|
||||
adc x10, x10, x18
|
||||
|
||||
stp x3, x4, [x2,#0]
|
||||
stp x5, x6, [x2,#16]
|
||||
stp x7, x8, [x2,#32]
|
||||
stp x9, x10, [x2,#48]
|
||||
ret
|
||||
|
||||
|
||||
//***********************************************************************
|
||||
// 2x503-bit multiprecision addition
|
||||
// Operation: c [x2] = a [x0] + b [x1]
|
||||
//***********************************************************************
|
||||
.global cdecl(sike_mpadd503x2_asm)
|
||||
.align 4
|
||||
cdecl(sike_mpadd503x2_asm):
|
||||
ldp x3, x4, [x0,#0]
|
||||
ldp x5, x6, [x0,#16]
|
||||
ldp x11, x12, [x1,#0]
|
||||
ldp x13, x14, [x1,#16]
|
||||
adds x3, x3, x11
|
||||
adcs x4, x4, x12
|
||||
adcs x5, x5, x13
|
||||
adcs x6, x6, x14
|
||||
ldp x7, x8, [x0,#32]
|
||||
ldp x9, x10, [x0,#48]
|
||||
ldp x15, x16, [x1,#32]
|
||||
ldp x17, x18, [x1,#48]
|
||||
adcs x7, x7, x15
|
||||
adcs x8, x8, x16
|
||||
adcs x9, x9, x17
|
||||
adcs x10, x10, x18
|
||||
|
||||
stp x3, x4, [x2,#0]
|
||||
stp x5, x6, [x2,#16]
|
||||
stp x7, x8, [x2,#32]
|
||||
stp x9, x10, [x2,#48]
|
||||
|
||||
ldp x3, x4, [x0,#64]
|
||||
ldp x5, x6, [x0,#80]
|
||||
ldp x11, x12, [x1,#64]
|
||||
ldp x13, x14, [x1,#80]
|
||||
adcs x3, x3, x11
|
||||
adcs x4, x4, x12
|
||||
adcs x5, x5, x13
|
||||
adcs x6, x6, x14
|
||||
ldp x7, x8, [x0,#96]
|
||||
ldp x9, x10, [x0,#112]
|
||||
ldp x15, x16, [x1,#96]
|
||||
ldp x17, x18, [x1,#112]
|
||||
adcs x7, x7, x15
|
||||
adcs x8, x8, x16
|
||||
adcs x9, x9, x17
|
||||
adc x10, x10, x18
|
||||
|
||||
stp x3, x4, [x2,#64]
|
||||
stp x5, x6, [x2,#80]
|
||||
stp x7, x8, [x2,#96]
|
||||
stp x9, x10, [x2,#112]
|
||||
ret
|
||||
|
||||
|
||||
//***********************************************************************
|
||||
// 2x503-bit multiprecision subtraction
|
||||
// Operation: c [x2] = a [x0] - b [x1]. Returns borrow mask
|
||||
//***********************************************************************
|
||||
.global cdecl(sike_mpsubx2_asm)
|
||||
.align 4
|
||||
cdecl(sike_mpsubx2_asm):
|
||||
ldp x3, x4, [x0,#0]
|
||||
ldp x5, x6, [x0,#16]
|
||||
ldp x11, x12, [x1,#0]
|
||||
ldp x13, x14, [x1,#16]
|
||||
subs x3, x3, x11
|
||||
sbcs x4, x4, x12
|
||||
sbcs x5, x5, x13
|
||||
sbcs x6, x6, x14
|
||||
ldp x7, x8, [x0,#32]
|
||||
ldp x9, x10, [x0,#48]
|
||||
ldp x15, x16, [x1,#32]
|
||||
ldp x17, x18, [x1,#48]
|
||||
sbcs x7, x7, x15
|
||||
sbcs x8, x8, x16
|
||||
sbcs x9, x9, x17
|
||||
sbcs x10, x10, x18
|
||||
|
||||
stp x3, x4, [x2,#0]
|
||||
stp x5, x6, [x2,#16]
|
||||
stp x7, x8, [x2,#32]
|
||||
stp x9, x10, [x2,#48]
|
||||
|
||||
ldp x3, x4, [x0,#64]
|
||||
ldp x5, x6, [x0,#80]
|
||||
ldp x11, x12, [x1,#64]
|
||||
ldp x13, x14, [x1,#80]
|
||||
sbcs x3, x3, x11
|
||||
sbcs x4, x4, x12
|
||||
sbcs x5, x5, x13
|
||||
sbcs x6, x6, x14
|
||||
ldp x7, x8, [x0,#96]
|
||||
ldp x9, x10, [x0,#112]
|
||||
ldp x15, x16, [x1,#96]
|
||||
ldp x17, x18, [x1,#112]
|
||||
sbcs x7, x7, x15
|
||||
sbcs x8, x8, x16
|
||||
sbcs x9, x9, x17
|
||||
sbcs x10, x10, x18
|
||||
sbc x0, xzr, xzr
|
||||
|
||||
stp x3, x4, [x2,#64]
|
||||
stp x5, x6, [x2,#80]
|
||||
stp x7, x8, [x2,#96]
|
||||
stp x9, x10, [x2,#112]
|
||||
ret
|
||||
|
||||
|
||||
//***********************************************************************
|
||||
// Double 2x503-bit multiprecision subtraction
|
||||
// Operation: c [x2] = c [x2] - a [x0] - b [x1]
|
||||
//***********************************************************************
|
||||
.global cdecl(sike_mpdblsubx2_asm)
|
||||
.align 4
|
||||
cdecl(sike_mpdblsubx2_asm):
|
||||
sub sp, sp, #32
|
||||
stp x27, x28, [sp, #0]
|
||||
stp x29, x30, [sp, #16]
|
||||
ldp x3, x4, [x2,#0]
|
||||
ldp x5, x6, [x2,#16]
|
||||
ldp x7, x8, [x2,#32]
|
||||
ldp x9, x10, [x2,#48]
|
||||
ldp x11, x12, [x2,#64]
|
||||
ldp x13, x14, [x2,#80]
|
||||
ldp x15, x16, [x2,#96]
|
||||
ldp x17, x18, [x2,#112]
|
||||
|
||||
ldp x27, x28, [x0,#0]
|
||||
ldp x29, x30, [x0,#16]
|
||||
subs x3, x3, x27
|
||||
sbcs x4, x4, x28
|
||||
sbcs x5, x5, x29
|
||||
sbcs x6, x6, x30
|
||||
ldp x27, x28, [x0,#32]
|
||||
ldp x29, x30, [x0,#48]
|
||||
sbcs x7, x7, x27
|
||||
sbcs x8, x8, x28
|
||||
sbcs x9, x9, x29
|
||||
sbcs x10, x10, x30
|
||||
ldp x27, x28, [x0,#64]
|
||||
ldp x29, x30, [x0,#80]
|
||||
sbcs x11, x11, x27
|
||||
sbcs x12, x12, x28
|
||||
sbcs x13, x13, x29
|
||||
sbcs x14, x14, x30
|
||||
ldp x27, x28, [x0,#96]
|
||||
ldp x29, x30, [x0,#112]
|
||||
sbcs x15, x15, x27
|
||||
sbcs x16, x16, x28
|
||||
sbcs x17, x17, x29
|
||||
sbc x18, x18, x30
|
||||
|
||||
ldp x27, x28, [x1,#0]
|
||||
ldp x29, x30, [x1,#16]
|
||||
subs x3, x3, x27
|
||||
sbcs x4, x4, x28
|
||||
sbcs x5, x5, x29
|
||||
sbcs x6, x6, x30
|
||||
ldp x27, x28, [x1,#32]
|
||||
ldp x29, x30, [x1,#48]
|
||||
sbcs x7, x7, x27
|
||||
sbcs x8, x8, x28
|
||||
sbcs x9, x9, x29
|
||||
sbcs x10, x10, x30
|
||||
ldp x27, x28, [x1,#64]
|
||||
ldp x29, x30, [x1,#80]
|
||||
sbcs x11, x11, x27
|
||||
sbcs x12, x12, x28
|
||||
sbcs x13, x13, x29
|
||||
sbcs x14, x14, x30
|
||||
ldp x27, x28, [x1,#96]
|
||||
ldp x29, x30, [x1,#112]
|
||||
sbcs x15, x15, x27
|
||||
sbcs x16, x16, x28
|
||||
sbcs x17, x17, x29
|
||||
sbc x18, x18, x30
|
||||
|
||||
stp x3, x4, [x2,#0]
|
||||
stp x5, x6, [x2,#16]
|
||||
stp x7, x8, [x2,#32]
|
||||
stp x9, x10, [x2,#48]
|
||||
stp x11, x12, [x2,#64]
|
||||
stp x13, x14, [x2,#80]
|
||||
stp x15, x16, [x2,#96]
|
||||
stp x17, x18, [x2,#112]
|
||||
|
||||
ldp x27, x28, [sp, #0]
|
||||
ldp x29, x30, [sp, #16]
|
||||
add sp, sp, #32
|
||||
ret
|
||||
176
third_party/sike/src/asm/fp_generic.c
vendored
Normal file
176
third_party/sike/src/asm/fp_generic.c
vendored
Normal file
@ -0,0 +1,176 @@
|
||||
/********************************************************************************************
|
||||
* SIDH: an efficient supersingular isogeny cryptography library
|
||||
*
|
||||
* Abstract: portable modular arithmetic for P503
|
||||
*********************************************************************************************/
|
||||
|
||||
#include "../utils.h"
|
||||
#include "../fpx.h"
|
||||
|
||||
// Global constants
|
||||
extern const struct params_t p503;
|
||||
|
||||
static void digit_x_digit(const crypto_word_t a, const crypto_word_t b, crypto_word_t* c)
|
||||
{ // Digit multiplication, digit * digit -> 2-digit result
|
||||
register crypto_word_t al, ah, bl, bh, temp;
|
||||
crypto_word_t albl, albh, ahbl, ahbh, res1, res2, res3, carry;
|
||||
crypto_word_t mask_low = (crypto_word_t)(-1) >> (sizeof(crypto_word_t)*4);
|
||||
crypto_word_t mask_high = (crypto_word_t)(-1) << (sizeof(crypto_word_t)*4);
|
||||
|
||||
al = a & mask_low; // Low part
|
||||
ah = a >> (sizeof(crypto_word_t) * 4); // High part
|
||||
bl = b & mask_low;
|
||||
bh = b >> (sizeof(crypto_word_t) * 4);
|
||||
|
||||
albl = al*bl;
|
||||
albh = al*bh;
|
||||
ahbl = ah*bl;
|
||||
ahbh = ah*bh;
|
||||
c[0] = albl & mask_low; // C00
|
||||
|
||||
res1 = albl >> (sizeof(crypto_word_t) * 4);
|
||||
res2 = ahbl & mask_low;
|
||||
res3 = albh & mask_low;
|
||||
temp = res1 + res2 + res3;
|
||||
carry = temp >> (sizeof(crypto_word_t) * 4);
|
||||
c[0] ^= temp << (sizeof(crypto_word_t) * 4); // C01
|
||||
|
||||
res1 = ahbl >> (sizeof(crypto_word_t) * 4);
|
||||
res2 = albh >> (sizeof(crypto_word_t) * 4);
|
||||
res3 = ahbh & mask_low;
|
||||
temp = res1 + res2 + res3 + carry;
|
||||
c[1] = temp & mask_low; // C10
|
||||
carry = temp & mask_high;
|
||||
c[1] ^= (ahbh & mask_high) + carry; // C11
|
||||
}
|
||||
|
||||
|
||||
void sike_fpadd(const felm_t a, const felm_t b, felm_t c)
|
||||
{ // Modular addition, c = a+b mod p503.
|
||||
// Inputs: a, b in [0, 2*p503-1]
|
||||
// Output: c in [0, 2*p503-1]
|
||||
unsigned int i, carry = 0;
|
||||
crypto_word_t mask;
|
||||
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
ADDC(carry, a[i], b[i], carry, c[i]);
|
||||
}
|
||||
|
||||
carry = 0;
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
SUBC(carry, c[i], ((crypto_word_t*)p503.prime_x2)[i], carry, c[i]);
|
||||
}
|
||||
mask = 0 - (crypto_word_t)carry;
|
||||
|
||||
carry = 0;
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
ADDC(carry, c[i], ((crypto_word_t*)p503.prime_x2)[i] & mask, carry, c[i]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void sike_fpsub(const felm_t a, const felm_t b, felm_t c)
|
||||
{ // Modular subtraction, c = a-b mod p503.
|
||||
// Inputs: a, b in [0, 2*p503-1]
|
||||
// Output: c in [0, 2*p503-1]
|
||||
unsigned int i, borrow = 0;
|
||||
crypto_word_t mask;
|
||||
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
SUBC(borrow, a[i], b[i], borrow, c[i]);
|
||||
}
|
||||
mask = 0 - (crypto_word_t)borrow;
|
||||
|
||||
borrow = 0;
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
ADDC(borrow, c[i], ((crypto_word_t*)p503.prime_x2)[i] & mask, borrow, c[i]);
|
||||
}
|
||||
}
|
||||
|
||||
void sike_mpmul(const felm_t a, const felm_t b, dfelm_t c)
|
||||
{ // Multiprecision comba multiply, c = a*b, where lng(a) = lng(b) = NWORDS_FIELD.
|
||||
unsigned int i, j;
|
||||
crypto_word_t t = 0, u = 0, v = 0, UV[2];
|
||||
unsigned int carry = 0;
|
||||
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
for (j = 0; j <= i; j++) {
|
||||
MUL(a[j], b[i-j], UV+1, UV[0]);
|
||||
ADDC(0, UV[0], v, carry, v);
|
||||
ADDC(carry, UV[1], u, carry, u);
|
||||
t += carry;
|
||||
}
|
||||
c[i] = v;
|
||||
v = u;
|
||||
u = t;
|
||||
t = 0;
|
||||
}
|
||||
|
||||
for (i = NWORDS_FIELD; i < 2*NWORDS_FIELD-1; i++) {
|
||||
for (j = i-NWORDS_FIELD+1; j < NWORDS_FIELD; j++) {
|
||||
MUL(a[j], b[i-j], UV+1, UV[0]);
|
||||
ADDC(0, UV[0], v, carry, v);
|
||||
ADDC(carry, UV[1], u, carry, u);
|
||||
t += carry;
|
||||
}
|
||||
c[i] = v;
|
||||
v = u;
|
||||
u = t;
|
||||
t = 0;
|
||||
}
|
||||
c[2*NWORDS_FIELD-1] = v;
|
||||
}
|
||||
|
||||
void sike_fprdc(const felm_t ma, felm_t mc)
|
||||
{ // Efficient Montgomery reduction using comba and exploiting the special form of the prime p503.
|
||||
// mc = ma*R^-1 mod p503x2, where R = 2^512.
|
||||
// If ma < 2^512*p503, the output mc is in the range [0, 2*p503-1].
|
||||
// ma is assumed to be in Montgomery representation.
|
||||
unsigned int i, j, carry, count = p503_ZERO_WORDS;
|
||||
crypto_word_t UV[2], t = 0, u = 0, v = 0;
|
||||
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
mc[i] = 0;
|
||||
}
|
||||
|
||||
for (i = 0; i < NWORDS_FIELD; i++) {
|
||||
for (j = 0; j < i; j++) {
|
||||
if (j < (i-p503_ZERO_WORDS+1)) {
|
||||
MUL(mc[j], ((crypto_word_t*)p503.prime_p1)[i-j], UV+1, UV[0]);
|
||||
ADDC(0, UV[0], v, carry, v);
|
||||
ADDC(carry, UV[1], u, carry, u);
|
||||
t += carry;
|
||||
}
|
||||
}
|
||||
ADDC(0, v, ma[i], carry, v);
|
||||
ADDC(carry, u, 0, carry, u);
|
||||
t += carry;
|
||||
mc[i] = v;
|
||||
v = u;
|
||||
u = t;
|
||||
t = 0;
|
||||
}
|
||||
|
||||
for (i = NWORDS_FIELD; i < 2*NWORDS_FIELD-1; i++) {
|
||||
if (count > 0) {
|
||||
count -= 1;
|
||||
}
|
||||
for (j = i-NWORDS_FIELD+1; j < NWORDS_FIELD; j++) {
|
||||
if (j < (NWORDS_FIELD-count)) {
|
||||
MUL(mc[j], ((crypto_word_t*)p503.prime_p1)[i-j], UV+1, UV[0]);
|
||||
ADDC(0, UV[0], v, carry, v);
|
||||
ADDC(carry, UV[1], u, carry, u);
|
||||
t += carry;
|
||||
}
|
||||
}
|
||||
ADDC(0, v, ma[i], carry, v);
|
||||
ADDC(carry, u, 0, carry, u);
|
||||
t += carry;
|
||||
mc[i-NWORDS_FIELD] = v;
|
||||
v = u;
|
||||
u = t;
|
||||
t = 0;
|
||||
}
|
||||
ADDC(0, v, ma[2*NWORDS_FIELD-1], carry, v);
|
||||
mc[NWORDS_FIELD-1] = v;
|
||||
}
|
||||
1658
third_party/sike/src/asm/fp_x64_asm.S
vendored
Normal file
1658
third_party/sike/src/asm/fp_x64_asm.S
vendored
Normal file
File diff suppressed because it is too large
Load Diff
311
third_party/sike/src/fpx.c
vendored
Normal file
311
third_party/sike/src/fpx.c
vendored
Normal file
@ -0,0 +1,311 @@
|
||||
/********************************************************************************************
|
||||
* SIDH: an efficient supersingular isogeny cryptography library
|
||||
*
|
||||
* Abstract: core functions over GF(p) and GF(p^2)
|
||||
*********************************************************************************************/
|
||||
|
||||
#include "utils.h"
|
||||
#include "fpx.h"
|
||||
|
||||
extern const struct params_t p503;
|
||||
|
||||
// Double 2x503-bit multiprecision subtraction, c = c-a-b
|
||||
void sike_mpdblsubx2_asm(const felm_t a, const felm_t b, felm_t c);
|
||||
// Multiprecision subtraction, c = a-b
|
||||
crypto_word_t sike_mpsubx2_asm(const felm_t a, const felm_t b, felm_t c);
|
||||
// 503-bit multiprecision addition, c = a+b
|
||||
void sike_mpadd_asm(const felm_t a, const felm_t b, felm_t c);
|
||||
|
||||
// Multiprecision squaring, c = a^2 mod p.
|
||||
static void fpsqr_mont(const felm_t ma, felm_t mc)
|
||||
{
|
||||
dfelm_t temp = {0};
|
||||
sike_mpmul(ma, ma, temp);
|
||||
sike_fprdc(temp, mc);
|
||||
}
|
||||
|
||||
// Chain to compute a^(p-3)/4 using Montgomery arithmetic.
|
||||
static void fpinv_chain_mont(felm_t a)
|
||||
{
|
||||
unsigned int i, j;
|
||||
felm_t t[15], tt;
|
||||
|
||||
// Precomputed table
|
||||
fpsqr_mont(a, tt);
|
||||
sike_fpmul_mont(a, tt, t[0]);
|
||||
for (i = 0; i <= 13; i++) sike_fpmul_mont(t[i], tt, t[i+1]);
|
||||
|
||||
sike_fpcopy(a, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(a, tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[8], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 6; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[9], tt, tt);
|
||||
for (i = 0; i < 7; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[0], tt, tt);
|
||||
for (i = 0; i < 7; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(a, tt, tt);
|
||||
for (i = 0; i < 7; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 7; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[2], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[8], tt, tt);
|
||||
for (i = 0; i < 7; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(a, tt, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[10], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[0], tt, tt);
|
||||
for (i = 0; i < 6; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[10], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[10], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[5], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[2], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[3], tt, tt);
|
||||
for (i = 0; i < 6; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[5], tt, tt);
|
||||
for (i = 0; i < 12; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[12], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[8], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[12], tt, tt);
|
||||
for (i = 0; i < 6; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[11], tt, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[5], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[14], tt, tt);
|
||||
for (i = 0; i < 7; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[14], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[5], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[8], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(a, tt, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[4], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[6], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[5], tt, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[7], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(a, tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[0], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[11], tt, tt);
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[13], tt, tt);
|
||||
for (i = 0; i < 8; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[1], tt, tt);
|
||||
for (i = 0; i < 6; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[10], tt, tt);
|
||||
for (j = 0; j < 49; j++) {
|
||||
for (i = 0; i < 5; i++) fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(t[14], tt, tt);
|
||||
}
|
||||
sike_fpcopy(tt, a);
|
||||
}
|
||||
|
||||
// Field inversion using Montgomery arithmetic, a = a^(-1)*R mod p.
|
||||
static void fpinv_mont(felm_t a)
|
||||
{
|
||||
felm_t tt = {0};
|
||||
sike_fpcopy(a, tt);
|
||||
fpinv_chain_mont(tt);
|
||||
fpsqr_mont(tt, tt);
|
||||
fpsqr_mont(tt, tt);
|
||||
sike_fpmul_mont(a, tt, a);
|
||||
}
|
||||
|
||||
// Multiprecision addition, c = a+b, where lng(a) = lng(b) = nwords. Returns the carry bit.
|
||||
#if defined(OPENSSL_NO_ASM)
|
||||
inline static unsigned int mp_add(const felm_t a, const felm_t b, felm_t c, const unsigned int nwords) {
|
||||
uint8_t carry = 0;
|
||||
for (size_t i = 0; i < nwords; i++) {
|
||||
ADDC(carry, a[i], b[i], carry, c[i]);
|
||||
}
|
||||
return carry;
|
||||
}
|
||||
|
||||
// Multiprecision subtraction, c = a-b, where lng(a) = lng(b) = nwords. Returns the borrow bit.
|
||||
inline static unsigned int mp_sub(const felm_t a, const felm_t b, felm_t c, const unsigned int nwords) {
|
||||
uint32_t borrow = 0;
|
||||
for (size_t i = 0; i < nwords; i++) {
|
||||
SUBC(borrow, a[i], b[i], borrow, c[i]);
|
||||
}
|
||||
return borrow;
|
||||
}
|
||||
#endif
|
||||
|
||||
// Multiprecision addition, c = a+b.
|
||||
inline static void mp_addfast(const felm_t a, const felm_t b, felm_t c)
|
||||
{
|
||||
#if defined(OPENSSL_NO_ASM)
|
||||
mp_add(a, b, c, NWORDS_FIELD);
|
||||
#else
|
||||
sike_mpadd_asm(a, b, c);
|
||||
#endif
|
||||
}
|
||||
|
||||
// Multiprecision subtraction, c = a-b, where lng(a) = lng(b) = 2*NWORDS_FIELD.
|
||||
// If c < 0 then returns mask = 0xFF..F, else mask = 0x00..0
|
||||
inline static crypto_word_t mp_subfast(const felm_t a, const felm_t b, felm_t c) {
|
||||
#if defined(OPENSSL_NO_ASM)
|
||||
return (0 - (crypto_word_t)mp_sub(a, b, c, 2*NWORDS_FIELD));
|
||||
#else
|
||||
return sike_mpsubx2_asm(a, b, c);
|
||||
#endif
|
||||
}
|
||||
|
||||
// Multiprecision subtraction, c = c-a-b, where lng(a) = lng(b) = 2*NWORDS_FIELD.
|
||||
// Inputs should be s.t. c > a and c > b
|
||||
inline static void mp_dblsubfast(const felm_t a, const felm_t b, felm_t c) {
|
||||
#if defined(OPENSSL_NO_ASM)
|
||||
mp_sub(c, a, c, 2*NWORDS_FIELD);
|
||||
mp_sub(c, b, c, 2*NWORDS_FIELD);
|
||||
#else
|
||||
sike_mpdblsubx2_asm(a, b, c);
|
||||
#endif
|
||||
}
|
||||
|
||||
// Copy a field element, c = a.
|
||||
void sike_fpcopy(const felm_t a, felm_t c) {
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
c[i] = a[i];
|
||||
}
|
||||
}
|
||||
|
||||
// Field multiplication using Montgomery arithmetic, c = a*b*R^-1 mod p503, where R=2^768
|
||||
void sike_fpmul_mont(const felm_t ma, const felm_t mb, felm_t mc)
|
||||
{
|
||||
dfelm_t temp = {0};
|
||||
sike_mpmul(ma, mb, temp);
|
||||
sike_fprdc(temp, mc);
|
||||
}
|
||||
|
||||
// Conversion from Montgomery representation to standard representation,
|
||||
// c = ma*R^(-1) mod p = a mod p, where ma in [0, p-1].
|
||||
void sike_from_mont(const felm_t ma, felm_t c)
|
||||
{
|
||||
felm_t one = {0};
|
||||
one[0] = 1;
|
||||
|
||||
sike_fpmul_mont(ma, one, c);
|
||||
sike_fpcorrection(c);
|
||||
}
|
||||
|
||||
// GF(p^2) squaring using Montgomery arithmetic, c = a^2 in GF(p^2).
|
||||
// Inputs: a = a0+a1*i, where a0, a1 are in [0, 2*p-1]
|
||||
// Output: c = c0+c1*i, where c0, c1 are in [0, 2*p-1]
|
||||
void sike_fp2sqr_mont(const f2elm_t a, f2elm_t c) {
|
||||
felm_t t1, t2, t3;
|
||||
|
||||
mp_addfast(a->c0, a->c1, t1); // t1 = a0+a1
|
||||
sike_fpsub(a->c0, a->c1, t2); // t2 = a0-a1
|
||||
mp_addfast(a->c0, a->c0, t3); // t3 = 2a0
|
||||
sike_fpmul_mont(t1, t2, c->c0); // c0 = (a0+a1)(a0-a1)
|
||||
sike_fpmul_mont(t3, a->c1, c->c1); // c1 = 2a0*a1
|
||||
}
|
||||
|
||||
// Modular negation, a = -a mod p503.
|
||||
// Input/output: a in [0, 2*p503-1]
|
||||
void sike_fpneg(felm_t a) {
|
||||
uint32_t borrow = 0;
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
SUBC(borrow, ((crypto_word_t*)p503.prime_x2)[i], a[i], borrow, a[i]);
|
||||
}
|
||||
}
|
||||
|
||||
// Modular division by two, c = a/2 mod p503.
|
||||
// Input : a in [0, 2*p503-1]
|
||||
// Output: c in [0, 2*p503-1]
|
||||
void sike_fpdiv2(const felm_t a, felm_t c) {
|
||||
uint32_t carry = 0;
|
||||
crypto_word_t mask;
|
||||
|
||||
mask = 0 - (crypto_word_t)(a[0] & 1); // If a is odd compute a+p503
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
ADDC(carry, a[i], ((crypto_word_t*)p503.prime)[i] & mask, carry, c[i]);
|
||||
}
|
||||
|
||||
// Multiprecision right shift by one.
|
||||
for (size_t i = 0; i < NWORDS_FIELD-1; i++) {
|
||||
c[i] = (c[i] >> 1) ^ (c[i+1] << (RADIX - 1));
|
||||
}
|
||||
c[NWORDS_FIELD-1] >>= 1;
|
||||
}
|
||||
|
||||
// Modular correction to reduce field element a in [0, 2*p503-1] to [0, p503-1].
|
||||
void sike_fpcorrection(felm_t a) {
|
||||
uint32_t borrow = 0;
|
||||
crypto_word_t mask;
|
||||
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
SUBC(borrow, a[i], ((crypto_word_t*)p503.prime)[i], borrow, a[i]);
|
||||
}
|
||||
mask = 0 - (crypto_word_t)borrow;
|
||||
|
||||
borrow = 0;
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
ADDC(borrow, a[i], ((crypto_word_t*)p503.prime)[i] & mask, borrow, a[i]);
|
||||
}
|
||||
}
|
||||
|
||||
// GF(p^2) multiplication using Montgomery arithmetic, c = a*b in GF(p^2).
|
||||
// Inputs: a = a0+a1*i and b = b0+b1*i, where a0, a1, b0, b1 are in [0, 2*p-1]
|
||||
// Output: c = c0+c1*i, where c0, c1 are in [0, 2*p-1]
|
||||
void sike_fp2mul_mont(const f2elm_t a, const f2elm_t b, f2elm_t c) {
|
||||
felm_t t1, t2;
|
||||
dfelm_t tt1, tt2, tt3;
|
||||
crypto_word_t mask;
|
||||
|
||||
mp_addfast(a->c0, a->c1, t1); // t1 = a0+a1
|
||||
mp_addfast(b->c0, b->c1, t2); // t2 = b0+b1
|
||||
sike_mpmul(a->c0, b->c0, tt1); // tt1 = a0*b0
|
||||
sike_mpmul(a->c1, b->c1, tt2); // tt2 = a1*b1
|
||||
sike_mpmul(t1, t2, tt3); // tt3 = (a0+a1)*(b0+b1)
|
||||
mp_dblsubfast(tt1, tt2, tt3); // tt3 = (a0+a1)*(b0+b1) - a0*b0 - a1*b1
|
||||
mask = mp_subfast(tt1, tt2, tt1); // tt1 = a0*b0 - a1*b1. If tt1 < 0 then mask = 0xFF..F, else if tt1 >= 0 then mask = 0x00..0
|
||||
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
t1[i] = ((crypto_word_t*)p503.prime)[i] & mask;
|
||||
}
|
||||
|
||||
sike_fprdc(tt3, c->c1); // c[1] = (a0+a1)*(b0+b1) - a0*b0 - a1*b1
|
||||
mp_addfast((crypto_word_t*)&tt1[NWORDS_FIELD], t1, (crypto_word_t*)&tt1[NWORDS_FIELD]);
|
||||
sike_fprdc(tt1, c->c0); // c[0] = a0*b0 - a1*b1
|
||||
}
|
||||
|
||||
// GF(p^2) inversion using Montgomery arithmetic, a = (a0-i*a1)/(a0^2+a1^2).
|
||||
void sike_fp2inv_mont(f2elm_t a) {
|
||||
f2elm_t t1;
|
||||
|
||||
fpsqr_mont(a->c0, t1->c0); // t10 = a0^2
|
||||
fpsqr_mont(a->c1, t1->c1); // t11 = a1^2
|
||||
sike_fpadd(t1->c0, t1->c1, t1->c0); // t10 = a0^2+a1^2
|
||||
fpinv_mont(t1->c0); // t10 = (a0^2+a1^2)^-1
|
||||
sike_fpneg(a->c1); // a = a0-i*a1
|
||||
sike_fpmul_mont(a->c0, t1->c0, a->c0);
|
||||
sike_fpmul_mont(a->c1, t1->c0, a->c1); // a = (a0-i*a1)*(a0^2+a1^2)^-1
|
||||
}
|
||||
98
third_party/sike/src/fpx.h
vendored
Normal file
98
third_party/sike/src/fpx.h
vendored
Normal file
@ -0,0 +1,98 @@
|
||||
#ifndef FPX_H_
|
||||
#define FPX_H_
|
||||
|
||||
#include "utils.h"
|
||||
|
||||
// Modular addition, c = a+b mod p503.
|
||||
void sike_fpadd(const felm_t a, const felm_t b, felm_t c);
|
||||
// Modular subtraction, c = a-b mod p503.
|
||||
void sike_fpsub(const felm_t a, const felm_t b, felm_t c);
|
||||
// Modular division by two, c = a/2 mod p503.
|
||||
void sike_fpdiv2(const felm_t a, felm_t c);
|
||||
// Modular correction to reduce field element a in [0, 2*p503-1] to [0, p503-1].
|
||||
void sike_fpcorrection(felm_t a);
|
||||
// Multiprecision multiply, c = a*b, where lng(a) = lng(b) = nwords.
|
||||
void sike_mpmul(const felm_t a, const felm_t b, dfelm_t c);
|
||||
// 503-bit Montgomery reduction, c = a mod p
|
||||
void sike_fprdc(const dfelm_t a, felm_t c);
|
||||
// Modular negation, a = -a mod p503.
|
||||
void sike_fpneg(felm_t a);
|
||||
// Copy of a field element, c = a
|
||||
void sike_fpcopy(const felm_t a, felm_t c);
|
||||
// Copy a field element, c = a.
|
||||
void sike_fpzero(felm_t a);
|
||||
// If option = 0xFF...FF x=y; y=x, otherwise swap doesn't happen. Constant time.
|
||||
void sike_cswap_asm(point_proj_t x, point_proj_t y, const crypto_word_t option);
|
||||
// Conversion from Montgomery representation to standard representation,
|
||||
// c = ma*R^(-1) mod p = a mod p, where ma in [0, p-1].
|
||||
void sike_from_mont(const felm_t ma, felm_t c);
|
||||
// Field multiplication using Montgomery arithmetic, c = a*b*R^-1 mod p503, where R=2^768
|
||||
void sike_fpmul_mont(const felm_t ma, const felm_t mb, felm_t mc);
|
||||
// GF(p503^2) multiplication using Montgomery arithmetic, c = a*b in GF(p503^2)
|
||||
void sike_fp2mul_mont(const f2elm_t a, const f2elm_t b, f2elm_t c);
|
||||
// GF(p503^2) inversion using Montgomery arithmetic, a = (a0-i*a1)/(a0^2+a1^2)
|
||||
void sike_fp2inv_mont(f2elm_t a);
|
||||
// GF(p^2) squaring using Montgomery arithmetic, c = a^2 in GF(p^2).
|
||||
void sike_fp2sqr_mont(const f2elm_t a, f2elm_t c);
|
||||
// Modular correction, a = a in GF(p^2).
|
||||
void sike_fp2correction(f2elm_t a);
|
||||
|
||||
// GF(p^2) addition, c = a+b in GF(p^2).
|
||||
#define sike_fp2add(a, b, c) \
|
||||
do { \
|
||||
sike_fpadd(a->c0, b->c0, c->c0); \
|
||||
sike_fpadd(a->c1, b->c1, c->c1); \
|
||||
} while(0)
|
||||
|
||||
// GF(p^2) subtraction, c = a-b in GF(p^2).
|
||||
#define sike_fp2sub(a,b,c) \
|
||||
do { \
|
||||
sike_fpsub(a->c0, b->c0, c->c0); \
|
||||
sike_fpsub(a->c1, b->c1, c->c1); \
|
||||
} while(0)
|
||||
|
||||
// Copy a GF(p^2) element, c = a.
|
||||
#define sike_fp2copy(a, c) \
|
||||
do { \
|
||||
sike_fpcopy(a->c0, c->c0); \
|
||||
sike_fpcopy(a->c1, c->c1); \
|
||||
} while(0)
|
||||
|
||||
// GF(p^2) negation, a = -a in GF(p^2).
|
||||
#define sike_fp2neg(a) \
|
||||
do { \
|
||||
sike_fpneg(a->c0); \
|
||||
sike_fpneg(a->c1); \
|
||||
} while(0)
|
||||
|
||||
// GF(p^2) division by two, c = a/2 in GF(p^2).
|
||||
#define sike_fp2div2(a, c) \
|
||||
do { \
|
||||
sike_fpdiv2(a->c0, c->c0); \
|
||||
sike_fpdiv2(a->c1, c->c1); \
|
||||
} while(0)
|
||||
|
||||
// Modular correction, a = a in GF(p^2).
|
||||
#define sike_fp2correction(a) \
|
||||
do { \
|
||||
sike_fpcorrection(a->c0); \
|
||||
sike_fpcorrection(a->c1); \
|
||||
} while(0)
|
||||
|
||||
// Conversion of a GF(p^2) element to Montgomery representation,
|
||||
// mc_i = a_i*R^2*R^(-1) = a_i*R in GF(p^2).
|
||||
#define sike_to_fp2mont(a, mc) \
|
||||
do { \
|
||||
sike_fpmul_mont(a->c0, (crypto_word_t*)&p503.mont_R2, mc->c0); \
|
||||
sike_fpmul_mont(a->c1, (crypto_word_t*)&p503.mont_R2, mc->c1); \
|
||||
} while(0)
|
||||
|
||||
// Conversion of a GF(p^2) element from Montgomery representation to standard representation,
|
||||
// c_i = ma_i*R^(-1) = a_i in GF(p^2).
|
||||
#define sike_from_fp2mont(ma, c) \
|
||||
do { \
|
||||
sike_from_mont(ma->c0, c->c0); \
|
||||
sike_from_mont(ma->c1, c->c1); \
|
||||
} while(0)
|
||||
|
||||
#endif // FPX_H_
|
||||
260
third_party/sike/src/isogeny.c
vendored
Normal file
260
third_party/sike/src/isogeny.c
vendored
Normal file
@ -0,0 +1,260 @@
|
||||
/********************************************************************************************
|
||||
* SIDH: an efficient supersingular isogeny cryptography library
|
||||
*
|
||||
* Abstract: elliptic curve and isogeny functions
|
||||
*********************************************************************************************/
|
||||
#include "utils.h"
|
||||
#include "isogeny.h"
|
||||
#include "fpx.h"
|
||||
|
||||
static void xDBL(const point_proj_t P, point_proj_t Q, const f2elm_t A24plus, const f2elm_t C24)
|
||||
{ // Doubling of a Montgomery point in projective coordinates (X:Z).
|
||||
// Input: projective Montgomery x-coordinates P = (X1:Z1), where x1=X1/Z1 and Montgomery curve constants A+2C and 4C.
|
||||
// Output: projective Montgomery x-coordinates Q = 2*P = (X2:Z2).
|
||||
f2elm_t t0, t1;
|
||||
|
||||
sike_fp2sub(P->X, P->Z, t0); // t0 = X1-Z1
|
||||
sike_fp2add(P->X, P->Z, t1); // t1 = X1+Z1
|
||||
sike_fp2sqr_mont(t0, t0); // t0 = (X1-Z1)^2
|
||||
sike_fp2sqr_mont(t1, t1); // t1 = (X1+Z1)^2
|
||||
sike_fp2mul_mont(C24, t0, Q->Z); // Z2 = C24*(X1-Z1)^2
|
||||
sike_fp2mul_mont(t1, Q->Z, Q->X); // X2 = C24*(X1-Z1)^2*(X1+Z1)^2
|
||||
sike_fp2sub(t1, t0, t1); // t1 = (X1+Z1)^2-(X1-Z1)^2
|
||||
sike_fp2mul_mont(A24plus, t1, t0); // t0 = A24plus*[(X1+Z1)^2-(X1-Z1)^2]
|
||||
sike_fp2add(Q->Z, t0, Q->Z); // Z2 = A24plus*[(X1+Z1)^2-(X1-Z1)^2] + C24*(X1-Z1)^2
|
||||
sike_fp2mul_mont(Q->Z, t1, Q->Z); // Z2 = [A24plus*[(X1+Z1)^2-(X1-Z1)^2] + C24*(X1-Z1)^2]*[(X1+Z1)^2-(X1-Z1)^2]
|
||||
}
|
||||
|
||||
void xDBLe(const point_proj_t P, point_proj_t Q, const f2elm_t A24plus, const f2elm_t C24, size_t e)
|
||||
{ // Computes [2^e](X:Z) on Montgomery curve with projective constant via e repeated doublings.
|
||||
// Input: projective Montgomery x-coordinates P = (XP:ZP), such that xP=XP/ZP and Montgomery curve constants A+2C and 4C.
|
||||
// Output: projective Montgomery x-coordinates Q <- (2^e)*P.
|
||||
|
||||
memcpy(Q, P, sizeof(*P));
|
||||
for (size_t i = 0; i < e; i++) {
|
||||
xDBL(Q, Q, A24plus, C24);
|
||||
}
|
||||
}
|
||||
|
||||
void get_4_isog(const point_proj_t P, f2elm_t A24plus, f2elm_t C24, f2elm_t* coeff)
|
||||
{ // Computes the corresponding 4-isogeny of a projective Montgomery point (X4:Z4) of order 4.
|
||||
// Input: projective point of order four P = (X4:Z4).
|
||||
// Output: the 4-isogenous Montgomery curve with projective coefficients A+2C/4C and the 3 coefficients
|
||||
// that are used to evaluate the isogeny at a point in eval_4_isog().
|
||||
|
||||
sike_fp2sub(P->X, P->Z, coeff[1]); // coeff[1] = X4-Z4
|
||||
sike_fp2add(P->X, P->Z, coeff[2]); // coeff[2] = X4+Z4
|
||||
sike_fp2sqr_mont(P->Z, coeff[0]); // coeff[0] = Z4^2
|
||||
sike_fp2add(coeff[0], coeff[0], coeff[0]); // coeff[0] = 2*Z4^2
|
||||
sike_fp2sqr_mont(coeff[0], C24); // C24 = 4*Z4^4
|
||||
sike_fp2add(coeff[0], coeff[0], coeff[0]); // coeff[0] = 4*Z4^2
|
||||
sike_fp2sqr_mont(P->X, A24plus); // A24plus = X4^2
|
||||
sike_fp2add(A24plus, A24plus, A24plus); // A24plus = 2*X4^2
|
||||
sike_fp2sqr_mont(A24plus, A24plus); // A24plus = 4*X4^4
|
||||
}
|
||||
|
||||
void eval_4_isog(point_proj_t P, f2elm_t* coeff)
|
||||
{ // Evaluates the isogeny at the point (X:Z) in the domain of the isogeny, given a 4-isogeny phi defined
|
||||
// by the 3 coefficients in coeff (computed in the function get_4_isog()).
|
||||
// Inputs: the coefficients defining the isogeny, and the projective point P = (X:Z).
|
||||
// Output: the projective point P = phi(P) = (X:Z) in the codomain.
|
||||
f2elm_t t0, t1;
|
||||
|
||||
sike_fp2add(P->X, P->Z, t0); // t0 = X+Z
|
||||
sike_fp2sub(P->X, P->Z, t1); // t1 = X-Z
|
||||
sike_fp2mul_mont(t0, coeff[1], P->X); // X = (X+Z)*coeff[1]
|
||||
sike_fp2mul_mont(t1, coeff[2], P->Z); // Z = (X-Z)*coeff[2]
|
||||
sike_fp2mul_mont(t0, t1, t0); // t0 = (X+Z)*(X-Z)
|
||||
sike_fp2mul_mont(t0, coeff[0], t0); // t0 = coeff[0]*(X+Z)*(X-Z)
|
||||
sike_fp2add(P->X, P->Z, t1); // t1 = (X-Z)*coeff[2] + (X+Z)*coeff[1]
|
||||
sike_fp2sub(P->X, P->Z, P->Z); // Z = (X-Z)*coeff[2] - (X+Z)*coeff[1]
|
||||
sike_fp2sqr_mont(t1, t1); // t1 = [(X-Z)*coeff[2] + (X+Z)*coeff[1]]^2
|
||||
sike_fp2sqr_mont(P->Z, P->Z); // Z = [(X-Z)*coeff[2] - (X+Z)*coeff[1]]^2
|
||||
sike_fp2add(t1, t0, P->X); // X = coeff[0]*(X+Z)*(X-Z) + [(X-Z)*coeff[2] + (X+Z)*coeff[1]]^2
|
||||
sike_fp2sub(P->Z, t0, t0); // t0 = [(X-Z)*coeff[2] - (X+Z)*coeff[1]]^2 - coeff[0]*(X+Z)*(X-Z)
|
||||
sike_fp2mul_mont(P->X, t1, P->X); // Xfinal
|
||||
sike_fp2mul_mont(P->Z, t0, P->Z); // Zfinal
|
||||
}
|
||||
|
||||
|
||||
void xTPL(const point_proj_t P, point_proj_t Q, const f2elm_t A24minus, const f2elm_t A24plus)
|
||||
{ // Tripling of a Montgomery point in projective coordinates (X:Z).
|
||||
// Input: projective Montgomery x-coordinates P = (X:Z), where x=X/Z and Montgomery curve constants A24plus = A+2C and A24minus = A-2C.
|
||||
// Output: projective Montgomery x-coordinates Q = 3*P = (X3:Z3).
|
||||
f2elm_t t0, t1, t2, t3, t4, t5, t6;
|
||||
|
||||
sike_fp2sub(P->X, P->Z, t0); // t0 = X-Z
|
||||
sike_fp2sqr_mont(t0, t2); // t2 = (X-Z)^2
|
||||
sike_fp2add(P->X, P->Z, t1); // t1 = X+Z
|
||||
sike_fp2sqr_mont(t1, t3); // t3 = (X+Z)^2
|
||||
sike_fp2add(t0, t1, t4); // t4 = 2*X
|
||||
sike_fp2sub(t1, t0, t0); // t0 = 2*Z
|
||||
sike_fp2sqr_mont(t4, t1); // t1 = 4*X^2
|
||||
sike_fp2sub(t1, t3, t1); // t1 = 4*X^2 - (X+Z)^2
|
||||
sike_fp2sub(t1, t2, t1); // t1 = 4*X^2 - (X+Z)^2 - (X-Z)^2
|
||||
sike_fp2mul_mont(t3, A24plus, t5); // t5 = A24plus*(X+Z)^2
|
||||
sike_fp2mul_mont(t3, t5, t3); // t3 = A24plus*(X+Z)^3
|
||||
sike_fp2mul_mont(A24minus, t2, t6); // t6 = A24minus*(X-Z)^2
|
||||
sike_fp2mul_mont(t2, t6, t2); // t2 = A24minus*(X-Z)^3
|
||||
sike_fp2sub(t2, t3, t3); // t3 = A24minus*(X-Z)^3 - coeff*(X+Z)^3
|
||||
sike_fp2sub(t5, t6, t2); // t2 = A24plus*(X+Z)^2 - A24minus*(X-Z)^2
|
||||
sike_fp2mul_mont(t1, t2, t1); // t1 = [4*X^2 - (X+Z)^2 - (X-Z)^2]*[A24plus*(X+Z)^2 - A24minus*(X-Z)^2]
|
||||
sike_fp2add(t3, t1, t2); // t2 = [4*X^2 - (X+Z)^2 - (X-Z)^2]*[A24plus*(X+Z)^2 - A24minus*(X-Z)^2] + A24minus*(X-Z)^3 - coeff*(X+Z)^3
|
||||
sike_fp2sqr_mont(t2, t2); // t2 = t2^2
|
||||
sike_fp2mul_mont(t4, t2, Q->X); // X3 = 2*X*t2
|
||||
sike_fp2sub(t3, t1, t1); // t1 = A24minus*(X-Z)^3 - A24plus*(X+Z)^3 - [4*X^2 - (X+Z)^2 - (X-Z)^2]*[A24plus*(X+Z)^2 - A24minus*(X-Z)^2]
|
||||
sike_fp2sqr_mont(t1, t1); // t1 = t1^2
|
||||
sike_fp2mul_mont(t0, t1, Q->Z); // Z3 = 2*Z*t1
|
||||
}
|
||||
|
||||
void xTPLe(const point_proj_t P, point_proj_t Q, const f2elm_t A24minus, const f2elm_t A24plus, size_t e)
|
||||
{ // Computes [3^e](X:Z) on Montgomery curve with projective constant via e repeated triplings.
|
||||
// Input: projective Montgomery x-coordinates P = (XP:ZP), such that xP=XP/ZP and Montgomery curve constants A24plus = A+2C and A24minus = A-2C.
|
||||
// Output: projective Montgomery x-coordinates Q <- (3^e)*P.
|
||||
memcpy(Q, P, sizeof(*P));
|
||||
for (size_t i = 0; i < e; i++) {
|
||||
xTPL(Q, Q, A24minus, A24plus);
|
||||
}
|
||||
}
|
||||
|
||||
void get_3_isog(const point_proj_t P, f2elm_t A24minus, f2elm_t A24plus, f2elm_t* coeff)
|
||||
{ // Computes the corresponding 3-isogeny of a projective Montgomery point (X3:Z3) of order 3.
|
||||
// Input: projective point of order three P = (X3:Z3).
|
||||
// Output: the 3-isogenous Montgomery curve with projective coefficient A/C.
|
||||
f2elm_t t0, t1, t2, t3, t4;
|
||||
|
||||
sike_fp2sub(P->X, P->Z, coeff[0]); // coeff0 = X-Z
|
||||
sike_fp2sqr_mont(coeff[0], t0); // t0 = (X-Z)^2
|
||||
sike_fp2add(P->X, P->Z, coeff[1]); // coeff1 = X+Z
|
||||
sike_fp2sqr_mont(coeff[1], t1); // t1 = (X+Z)^2
|
||||
sike_fp2add(t0, t1, t2); // t2 = (X+Z)^2 + (X-Z)^2
|
||||
sike_fp2add(coeff[0], coeff[1], t3); // t3 = 2*X
|
||||
sike_fp2sqr_mont(t3, t3); // t3 = 4*X^2
|
||||
sike_fp2sub(t3, t2, t3); // t3 = 4*X^2 - (X+Z)^2 - (X-Z)^2
|
||||
sike_fp2add(t1, t3, t2); // t2 = 4*X^2 - (X-Z)^2
|
||||
sike_fp2add(t3, t0, t3); // t3 = 4*X^2 - (X+Z)^2
|
||||
sike_fp2add(t0, t3, t4); // t4 = 4*X^2 - (X+Z)^2 + (X-Z)^2
|
||||
sike_fp2add(t4, t4, t4); // t4 = 2(4*X^2 - (X+Z)^2 + (X-Z)^2)
|
||||
sike_fp2add(t1, t4, t4); // t4 = 8*X^2 - (X+Z)^2 + 2*(X-Z)^2
|
||||
sike_fp2mul_mont(t2, t4, A24minus); // A24minus = [4*X^2 - (X-Z)^2]*[8*X^2 - (X+Z)^2 + 2*(X-Z)^2]
|
||||
sike_fp2add(t1, t2, t4); // t4 = 4*X^2 + (X+Z)^2 - (X-Z)^2
|
||||
sike_fp2add(t4, t4, t4); // t4 = 2(4*X^2 + (X+Z)^2 - (X-Z)^2)
|
||||
sike_fp2add(t0, t4, t4); // t4 = 8*X^2 + 2*(X+Z)^2 - (X-Z)^2
|
||||
sike_fp2mul_mont(t3, t4, t4); // t4 = [4*X^2 - (X+Z)^2]*[8*X^2 + 2*(X+Z)^2 - (X-Z)^2]
|
||||
sike_fp2sub(t4, A24minus, t0); // t0 = [4*X^2 - (X+Z)^2]*[8*X^2 + 2*(X+Z)^2 - (X-Z)^2] - [4*X^2 - (X-Z)^2]*[8*X^2 - (X+Z)^2 + 2*(X-Z)^2]
|
||||
sike_fp2add(A24minus, t0, A24plus); // A24plus = 8*X^2 - (X+Z)^2 + 2*(X-Z)^2
|
||||
}
|
||||
|
||||
|
||||
void eval_3_isog(point_proj_t Q, f2elm_t* coeff)
|
||||
{ // Computes the 3-isogeny R=phi(X:Z), given projective point (X3:Z3) of order 3 on a Montgomery curve and
|
||||
// a point P with 2 coefficients in coeff (computed in the function get_3_isog()).
|
||||
// Inputs: projective points P = (X3:Z3) and Q = (X:Z).
|
||||
// Output: the projective point Q <- phi(Q) = (X3:Z3).
|
||||
f2elm_t t0, t1, t2;
|
||||
|
||||
sike_fp2add(Q->X, Q->Z, t0); // t0 = X+Z
|
||||
sike_fp2sub(Q->X, Q->Z, t1); // t1 = X-Z
|
||||
sike_fp2mul_mont(t0, coeff[0], t0); // t0 = coeff0*(X+Z)
|
||||
sike_fp2mul_mont(t1, coeff[1], t1); // t1 = coeff1*(X-Z)
|
||||
sike_fp2add(t0, t1, t2); // t2 = coeff0*(X+Z) + coeff1*(X-Z)
|
||||
sike_fp2sub(t1, t0, t0); // t0 = coeff1*(X-Z) - coeff0*(X+Z)
|
||||
sike_fp2sqr_mont(t2, t2); // t2 = [coeff0*(X+Z) + coeff1*(X-Z)]^2
|
||||
sike_fp2sqr_mont(t0, t0); // t0 = [coeff1*(X-Z) - coeff0*(X+Z)]^2
|
||||
sike_fp2mul_mont(Q->X, t2, Q->X); // X3final = X*[coeff0*(X+Z) + coeff1*(X-Z)]^2
|
||||
sike_fp2mul_mont(Q->Z, t0, Q->Z); // Z3final = Z*[coeff1*(X-Z) - coeff0*(X+Z)]^2
|
||||
}
|
||||
|
||||
|
||||
void inv_3_way(f2elm_t z1, f2elm_t z2, f2elm_t z3)
|
||||
{ // 3-way simultaneous inversion
|
||||
// Input: z1,z2,z3
|
||||
// Output: 1/z1,1/z2,1/z3 (override inputs).
|
||||
f2elm_t t0, t1, t2, t3;
|
||||
|
||||
sike_fp2mul_mont(z1, z2, t0); // t0 = z1*z2
|
||||
sike_fp2mul_mont(z3, t0, t1); // t1 = z1*z2*z3
|
||||
sike_fp2inv_mont(t1); // t1 = 1/(z1*z2*z3)
|
||||
sike_fp2mul_mont(z3, t1, t2); // t2 = 1/(z1*z2)
|
||||
sike_fp2mul_mont(t2, z2, t3); // t3 = 1/z1
|
||||
sike_fp2mul_mont(t2, z1, z2); // z2 = 1/z2
|
||||
sike_fp2mul_mont(t0, t1, z3); // z3 = 1/z3
|
||||
sike_fp2copy(t3, z1); // z1 = 1/z1
|
||||
}
|
||||
|
||||
|
||||
void get_A(const f2elm_t xP, const f2elm_t xQ, const f2elm_t xR, f2elm_t A)
|
||||
{ // Given the x-coordinates of P, Q, and R, returns the value A corresponding to the Montgomery curve E_A: y^2=x^3+A*x^2+x such that R=Q-P on E_A.
|
||||
// Input: the x-coordinates xP, xQ, and xR of the points P, Q and R.
|
||||
// Output: the coefficient A corresponding to the curve E_A: y^2=x^3+A*x^2+x.
|
||||
f2elm_t t0, t1, one = F2ELM_INIT;
|
||||
|
||||
extern const struct params_t p503;
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, one->c0);
|
||||
sike_fp2add(xP, xQ, t1); // t1 = xP+xQ
|
||||
sike_fp2mul_mont(xP, xQ, t0); // t0 = xP*xQ
|
||||
sike_fp2mul_mont(xR, t1, A); // A = xR*t1
|
||||
sike_fp2add(t0, A, A); // A = A+t0
|
||||
sike_fp2mul_mont(t0, xR, t0); // t0 = t0*xR
|
||||
sike_fp2sub(A, one, A); // A = A-1
|
||||
sike_fp2add(t0, t0, t0); // t0 = t0+t0
|
||||
sike_fp2add(t1, xR, t1); // t1 = t1+xR
|
||||
sike_fp2add(t0, t0, t0); // t0 = t0+t0
|
||||
sike_fp2sqr_mont(A, A); // A = A^2
|
||||
sike_fp2inv_mont(t0); // t0 = 1/t0
|
||||
sike_fp2mul_mont(A, t0, A); // A = A*t0
|
||||
sike_fp2sub(A, t1, A); // Afinal = A-t1
|
||||
}
|
||||
|
||||
|
||||
void j_inv(const f2elm_t A, const f2elm_t C, f2elm_t jinv)
|
||||
{ // Computes the j-invariant of a Montgomery curve with projective constant.
|
||||
// Input: A,C in GF(p^2).
|
||||
// Output: j=256*(A^2-3*C^2)^3/(C^4*(A^2-4*C^2)), which is the j-invariant of the Montgomery curve B*y^2=x^3+(A/C)*x^2+x or (equivalently) j-invariant of B'*y^2=C*x^3+A*x^2+C*x.
|
||||
f2elm_t t0, t1;
|
||||
|
||||
sike_fp2sqr_mont(A, jinv); // jinv = A^2
|
||||
sike_fp2sqr_mont(C, t1); // t1 = C^2
|
||||
sike_fp2add(t1, t1, t0); // t0 = t1+t1
|
||||
sike_fp2sub(jinv, t0, t0); // t0 = jinv-t0
|
||||
sike_fp2sub(t0, t1, t0); // t0 = t0-t1
|
||||
sike_fp2sub(t0, t1, jinv); // jinv = t0-t1
|
||||
sike_fp2sqr_mont(t1, t1); // t1 = t1^2
|
||||
sike_fp2mul_mont(jinv, t1, jinv); // jinv = jinv*t1
|
||||
sike_fp2add(t0, t0, t0); // t0 = t0+t0
|
||||
sike_fp2add(t0, t0, t0); // t0 = t0+t0
|
||||
sike_fp2sqr_mont(t0, t1); // t1 = t0^2
|
||||
sike_fp2mul_mont(t0, t1, t0); // t0 = t0*t1
|
||||
sike_fp2add(t0, t0, t0); // t0 = t0+t0
|
||||
sike_fp2add(t0, t0, t0); // t0 = t0+t0
|
||||
sike_fp2inv_mont(jinv); // jinv = 1/jinv
|
||||
sike_fp2mul_mont(jinv, t0, jinv); // jinv = t0*jinv
|
||||
}
|
||||
|
||||
|
||||
void xDBLADD(point_proj_t P, point_proj_t Q, const f2elm_t xPQ, const f2elm_t A24)
|
||||
{ // Simultaneous doubling and differential addition.
|
||||
// Input: projective Montgomery points P=(XP:ZP) and Q=(XQ:ZQ) such that xP=XP/ZP and xQ=XQ/ZQ, affine difference xPQ=x(P-Q) and Montgomery curve constant A24=(A+2)/4.
|
||||
// Output: projective Montgomery points P <- 2*P = (X2P:Z2P) such that x(2P)=X2P/Z2P, and Q <- P+Q = (XQP:ZQP) such that = x(Q+P)=XQP/ZQP.
|
||||
f2elm_t t0, t1, t2;
|
||||
|
||||
sike_fp2add(P->X, P->Z, t0); // t0 = XP+ZP
|
||||
sike_fp2sub(P->X, P->Z, t1); // t1 = XP-ZP
|
||||
sike_fp2sqr_mont(t0, P->X); // XP = (XP+ZP)^2
|
||||
sike_fp2sub(Q->X, Q->Z, t2); // t2 = XQ-ZQ
|
||||
sike_fp2correction(t2);
|
||||
sike_fp2add(Q->X, Q->Z, Q->X); // XQ = XQ+ZQ
|
||||
sike_fp2mul_mont(t0, t2, t0); // t0 = (XP+ZP)*(XQ-ZQ)
|
||||
sike_fp2sqr_mont(t1, P->Z); // ZP = (XP-ZP)^2
|
||||
sike_fp2mul_mont(t1, Q->X, t1); // t1 = (XP-ZP)*(XQ+ZQ)
|
||||
sike_fp2sub(P->X, P->Z, t2); // t2 = (XP+ZP)^2-(XP-ZP)^2
|
||||
sike_fp2mul_mont(P->X, P->Z, P->X); // XP = (XP+ZP)^2*(XP-ZP)^2
|
||||
sike_fp2mul_mont(t2, A24, Q->X); // XQ = A24*[(XP+ZP)^2-(XP-ZP)^2]
|
||||
sike_fp2sub(t0, t1, Q->Z); // ZQ = (XP+ZP)*(XQ-ZQ)-(XP-ZP)*(XQ+ZQ)
|
||||
sike_fp2add(Q->X, P->Z, P->Z); // ZP = A24*[(XP+ZP)^2-(XP-ZP)^2]+(XP-ZP)^2
|
||||
sike_fp2add(t0, t1, Q->X); // XQ = (XP+ZP)*(XQ-ZQ)+(XP-ZP)*(XQ+ZQ)
|
||||
sike_fp2mul_mont(P->Z, t2, P->Z); // ZP = [A24*[(XP+ZP)^2-(XP-ZP)^2]+(XP-ZP)^2]*[(XP+ZP)^2-(XP-ZP)^2]
|
||||
sike_fp2sqr_mont(Q->Z, Q->Z); // ZQ = [(XP+ZP)*(XQ-ZQ)-(XP-ZP)*(XQ+ZQ)]^2
|
||||
sike_fp2sqr_mont(Q->X, Q->X); // XQ = [(XP+ZP)*(XQ-ZQ)+(XP-ZP)*(XQ+ZQ)]^2
|
||||
sike_fp2mul_mont(Q->Z, xPQ, Q->Z); // ZQ = xPQ*[(XP+ZP)*(XQ-ZQ)-(XP-ZP)*(XQ+ZQ)]^2
|
||||
}
|
||||
49
third_party/sike/src/isogeny.h
vendored
Normal file
49
third_party/sike/src/isogeny.h
vendored
Normal file
@ -0,0 +1,49 @@
|
||||
#ifndef ISOGENY_H_
|
||||
#define ISOGENY_H_
|
||||
|
||||
// Computes [2^e](X:Z) on Montgomery curve with projective
|
||||
// constant via e repeated doublings.
|
||||
void xDBLe(
|
||||
const point_proj_t P, point_proj_t Q, const f2elm_t A24plus,
|
||||
const f2elm_t C24, size_t e);
|
||||
// Simultaneous doubling and differential addition.
|
||||
void xDBLADD(
|
||||
point_proj_t P, point_proj_t Q, const f2elm_t xPQ,
|
||||
const f2elm_t A24);
|
||||
// Tripling of a Montgomery point in projective coordinates (X:Z).
|
||||
void xTPL(
|
||||
const point_proj_t P, point_proj_t Q, const f2elm_t A24minus,
|
||||
const f2elm_t A24plus);
|
||||
// Computes [3^e](X:Z) on Montgomery curve with projective constant
|
||||
// via e repeated triplings.
|
||||
void xTPLe(
|
||||
const point_proj_t P, point_proj_t Q, const f2elm_t A24minus,
|
||||
const f2elm_t A24plus, size_t e);
|
||||
// Given the x-coordinates of P, Q, and R, returns the value A
|
||||
// corresponding to the Montgomery curve E_A: y^2=x^3+A*x^2+x such that R=Q-P on E_A.
|
||||
void get_A(
|
||||
const f2elm_t xP, const f2elm_t xQ, const f2elm_t xR, f2elm_t A);
|
||||
// Computes the j-invariant of a Montgomery curve with projective constant.
|
||||
void j_inv(
|
||||
const f2elm_t A, const f2elm_t C, f2elm_t jinv);
|
||||
// Computes the corresponding 4-isogeny of a projective Montgomery
|
||||
// point (X4:Z4) of order 4.
|
||||
void get_4_isog(
|
||||
const point_proj_t P, f2elm_t A24plus, f2elm_t C24, f2elm_t* coeff);
|
||||
// Computes the corresponding 3-isogeny of a projective Montgomery
|
||||
// point (X3:Z3) of order 3.
|
||||
void get_3_isog(
|
||||
const point_proj_t P, f2elm_t A24minus, f2elm_t A24plus,
|
||||
f2elm_t* coeff);
|
||||
// Computes the 3-isogeny R=phi(X:Z), given projective point (X3:Z3)
|
||||
// of order 3 on a Montgomery curve and a point P with coefficients given in coeff.
|
||||
void eval_3_isog(
|
||||
point_proj_t Q, f2elm_t* coeff);
|
||||
// Evaluates the isogeny at the point (X:Z) in the domain of the isogeny.
|
||||
void eval_4_isog(
|
||||
point_proj_t P, f2elm_t* coeff);
|
||||
// 3-way simultaneous inversion
|
||||
void inv_3_way(
|
||||
f2elm_t z1, f2elm_t z2, f2elm_t z3);
|
||||
|
||||
#endif // ISOGENY_H_
|
||||
583
third_party/sike/src/sike.c
vendored
Normal file
583
third_party/sike/src/sike.c
vendored
Normal file
@ -0,0 +1,583 @@
|
||||
/********************************************************************************************
|
||||
* SIDH: an efficient supersingular isogeny cryptography library
|
||||
*
|
||||
* Abstract: supersingular isogeny key encapsulation (SIKE) protocol
|
||||
*********************************************************************************************/
|
||||
|
||||
#include <assert.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
#include <openssl/bn.h>
|
||||
#include <openssl/base.h>
|
||||
#include <openssl/rand.h>
|
||||
#include <openssl/mem.h>
|
||||
#include <openssl/hmac.h>
|
||||
#include <openssl/sha.h>
|
||||
|
||||
#include "utils.h"
|
||||
#include "isogeny.h"
|
||||
#include "fpx.h"
|
||||
|
||||
extern const struct params_t p503;
|
||||
|
||||
// Domain separation parameters for HMAC
|
||||
static const uint8_t G[2] = {0,0};
|
||||
static const uint8_t H[2] = {1,0};
|
||||
static const uint8_t F[2] = {2,0};
|
||||
|
||||
// SIDHp503_JINV_BYTESZ is a number of bytes used for encoding j-invariant.
|
||||
#define SIDHp503_JINV_BYTESZ 126U
|
||||
// SIDHp503_PRV_A_BITSZ is a number of bits of SIDH private key (2-isogeny)
|
||||
#define SIDHp503_PRV_A_BITSZ 250U
|
||||
// SIDHp503_PRV_A_BITSZ is a number of bits of SIDH private key (3-isogeny)
|
||||
#define SIDHp503_PRV_B_BITSZ 253U
|
||||
// MAX_INT_POINTS_ALICE is a number of points used in 2-isogeny tree computation
|
||||
#define MAX_INT_POINTS_ALICE 7U
|
||||
// MAX_INT_POINTS_ALICE is a number of points used in 3-isogeny tree computation
|
||||
#define MAX_INT_POINTS_BOB 8U
|
||||
|
||||
// Produces HMAC-SHA256 of data |S| mac'ed with the key |key|. Result is stored in |out|
|
||||
// which must have size of at least |outsz| bytes and must be not bigger than
|
||||
// SHA256_DIGEST_LENGTH. The output of a HMAC may be truncated.
|
||||
// The |key| buffer is reused by the hmac_sum and hence, it's size must be equal
|
||||
// to SHA256_CBLOCK. The HMAC key provided in |key| buffer must be smaller or equal
|
||||
// to SHA256_DIGHEST_LENTH. |key| can overlap |out|.
|
||||
static void hmac_sum(
|
||||
uint8_t *out, size_t outsz, const uint8_t S[2], uint8_t key[SHA256_CBLOCK]) {
|
||||
for(size_t i=0; i<SHA256_DIGEST_LENGTH; i++) {
|
||||
key[i] = key[i] ^ 0x36;
|
||||
}
|
||||
// set rest of the buffer to ipad = 0x36
|
||||
memset(&key[SHA256_DIGEST_LENGTH], 0x36, SHA256_CBLOCK - SHA256_DIGEST_LENGTH);
|
||||
|
||||
SHA256_CTX ctx;
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, key, SHA256_CBLOCK);
|
||||
SHA256_Update(&ctx, S, 2);
|
||||
uint8_t digest[SHA256_DIGEST_LENGTH];
|
||||
SHA256_Final(digest, &ctx);
|
||||
|
||||
// XOR key with an opad = 0x5C
|
||||
for(size_t i=0; i<SHA256_CBLOCK; i++) {
|
||||
key[i] = key[i] ^ 0x36 ^ 0x5C;
|
||||
}
|
||||
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, key, SHA256_CBLOCK);
|
||||
SHA256_Update(&ctx, digest, SHA256_DIGEST_LENGTH);
|
||||
SHA256_Final(digest, &ctx);
|
||||
assert(outsz <= sizeof(digest));
|
||||
memcpy(out, digest, outsz);
|
||||
}
|
||||
|
||||
// Swap points.
|
||||
// If option = 0 then P <- P and Q <- Q, else if option = 0xFF...FF then P <- Q and Q <- P
|
||||
#if !defined(OPENSSL_X86_64) || defined(OPENSSL_NO_ASM)
|
||||
static void sike_cswap(point_proj_t P, point_proj_t Q, const crypto_word_t option)
|
||||
{
|
||||
crypto_word_t temp;
|
||||
for (size_t i = 0; i < NWORDS_FIELD; i++) {
|
||||
temp = option & (P->X->c0[i] ^ Q->X->c0[i]);
|
||||
P->X->c0[i] = temp ^ P->X->c0[i];
|
||||
Q->X->c0[i] = temp ^ Q->X->c0[i];
|
||||
temp = option & (P->Z->c0[i] ^ Q->Z->c0[i]);
|
||||
P->Z->c0[i] = temp ^ P->Z->c0[i];
|
||||
Q->Z->c0[i] = temp ^ Q->Z->c0[i];
|
||||
temp = option & (P->X->c1[i] ^ Q->X->c1[i]);
|
||||
P->X->c1[i] = temp ^ P->X->c1[i];
|
||||
Q->X->c1[i] = temp ^ Q->X->c1[i];
|
||||
temp = option & (P->Z->c1[i] ^ Q->Z->c1[i]);
|
||||
P->Z->c1[i] = temp ^ P->Z->c1[i];
|
||||
Q->Z->c1[i] = temp ^ Q->Z->c1[i];
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
// Swap points.
|
||||
// If option = 0 then P <- P and Q <- Q, else if option = 0xFF...FF then P <- Q and Q <- P
|
||||
static inline void sike_fp2cswap(point_proj_t P, point_proj_t Q, const crypto_word_t option)
|
||||
{
|
||||
#if defined(OPENSSL_X86_64) && !defined(OPENSSL_NO_ASM)
|
||||
sike_cswap_asm(P, Q, option);
|
||||
#else
|
||||
sike_cswap(P, Q, option);
|
||||
#endif
|
||||
}
|
||||
|
||||
static void LADDER3PT(
|
||||
const f2elm_t xP, const f2elm_t xQ, const f2elm_t xPQ, const crypto_word_t* m,
|
||||
int is_A, point_proj_t R, const f2elm_t A) {
|
||||
point_proj_t R0 = POINT_PROJ_INIT, R2 = POINT_PROJ_INIT;
|
||||
f2elm_t A24 = F2ELM_INIT;
|
||||
crypto_word_t mask;
|
||||
int bit, swap, prevbit = 0;
|
||||
|
||||
const size_t nbits = is_A?SIDHp503_PRV_A_BITSZ:SIDHp503_PRV_B_BITSZ;
|
||||
|
||||
// Initializing constant
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, A24[0].c0);
|
||||
sike_fp2add(A24, A24, A24);
|
||||
sike_fp2add(A, A24, A24);
|
||||
sike_fp2div2(A24, A24);
|
||||
sike_fp2div2(A24, A24); // A24 = (A+2)/4
|
||||
|
||||
// Initializing points
|
||||
sike_fp2copy(xQ, R0->X);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, R0->Z[0].c0);
|
||||
sike_fp2copy(xPQ, R2->X);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, R2->Z[0].c0);
|
||||
sike_fp2copy(xP, R->X);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, R->Z[0].c0);
|
||||
memset(R->Z->c1, 0, sizeof(R->Z->c1));
|
||||
|
||||
// Main loop
|
||||
for (size_t i = 0; i < nbits; i++) {
|
||||
bit = (m[i >> LOG2RADIX] >> (i & (RADIX-1))) & 1;
|
||||
swap = bit ^ prevbit;
|
||||
prevbit = bit;
|
||||
mask = 0 - (crypto_word_t)swap;
|
||||
|
||||
sike_fp2cswap(R, R2, mask);
|
||||
xDBLADD(R0, R2, R->X, A24);
|
||||
sike_fp2mul_mont(R2->X, R->Z, R2->X);
|
||||
}
|
||||
}
|
||||
|
||||
// Initialization of basis points
|
||||
static inline void sike_init_basis(crypto_word_t *gen, f2elm_t XP, f2elm_t XQ, f2elm_t XR) {
|
||||
sike_fpcopy(gen, XP->c0);
|
||||
sike_fpcopy(gen + NWORDS_FIELD, XP->c1);
|
||||
sike_fpcopy(gen + 2*NWORDS_FIELD, XQ->c0);
|
||||
memset(XQ->c1, 0, sizeof(XQ->c1));
|
||||
sike_fpcopy(gen + 3*NWORDS_FIELD, XR->c0);
|
||||
sike_fpcopy(gen + 4*NWORDS_FIELD, XR->c1);
|
||||
}
|
||||
|
||||
// Conversion of GF(p^2) element from Montgomery to standard representation.
|
||||
static inline void sike_fp2_encode(const f2elm_t x, uint8_t *enc) {
|
||||
f2elm_t t;
|
||||
sike_from_fp2mont(x, t);
|
||||
|
||||
// convert to bytes in little endian form
|
||||
for (size_t i=0; i<FIELD_BYTESZ; i++) {
|
||||
enc[i+ 0] = (t[0].c0[i/LSZ] >> (LSZ*(i%LSZ))) & 0xFF;
|
||||
enc[i+FIELD_BYTESZ] = (t[0].c1[i/LSZ] >> (LSZ*(i%LSZ))) & 0xFF;
|
||||
}
|
||||
}
|
||||
|
||||
// Parse byte sequence back into GF(p^2) element, and conversion to Montgomery representation.
|
||||
// Elements over GF(p503) are encoded in 63 octets in little endian format
|
||||
// (i.e., the least significant octet is located in the lowest memory address).
|
||||
static inline void fp2_decode(const uint8_t *enc, f2elm_t t) {
|
||||
memset(t[0].c0, 0, sizeof(t[0].c0));
|
||||
memset(t[0].c1, 0, sizeof(t[0].c1));
|
||||
// convert bytes in little endian form to f2elm_t
|
||||
for (size_t i = 0; i < FIELD_BYTESZ; i++) {
|
||||
t[0].c0[i/LSZ] |= ((crypto_word_t)enc[i+ 0]) << (LSZ*(i%LSZ));
|
||||
t[0].c1[i/LSZ] |= ((crypto_word_t)enc[i+FIELD_BYTESZ]) << (LSZ*(i%LSZ));
|
||||
}
|
||||
sike_to_fp2mont(t, t);
|
||||
}
|
||||
|
||||
// Alice's ephemeral public key generation
|
||||
// Input: a private key prA in the range [0, 2^250 - 1], stored in 32 bytes.
|
||||
// Output: the public key pkA consisting of 3 GF(p503^2) elements encoded in 378 bytes.
|
||||
static void gen_iso_A(const uint8_t* skA, uint8_t* pkA)
|
||||
{
|
||||
point_proj_t R, pts[MAX_INT_POINTS_ALICE];
|
||||
point_proj_t phiP = POINT_PROJ_INIT;
|
||||
point_proj_t phiQ = POINT_PROJ_INIT;
|
||||
point_proj_t phiR = POINT_PROJ_INIT;
|
||||
f2elm_t XPA, XQA, XRA, coeff[3];
|
||||
f2elm_t A24plus = F2ELM_INIT;
|
||||
f2elm_t C24 = F2ELM_INIT;
|
||||
f2elm_t A = F2ELM_INIT;
|
||||
unsigned int m, index = 0, pts_index[MAX_INT_POINTS_ALICE], npts = 0, ii = 0;
|
||||
|
||||
// Initialize basis points
|
||||
sike_init_basis((crypto_word_t*)p503.A_gen, XPA, XQA, XRA);
|
||||
sike_init_basis((crypto_word_t*)p503.B_gen, phiP->X, phiQ->X, phiR->X);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, (phiP->Z)->c0);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, (phiQ->Z)->c0);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, (phiR->Z)->c0);
|
||||
|
||||
// Initialize constants
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, A24plus->c0);
|
||||
sike_fp2add(A24plus, A24plus, C24);
|
||||
|
||||
// Retrieve kernel point
|
||||
LADDER3PT(XPA, XQA, XRA, (crypto_word_t*)skA, 1, R, A);
|
||||
|
||||
// Traverse tree
|
||||
index = 0;
|
||||
for (size_t row = 1; row < A_max; row++) {
|
||||
while (index < A_max-row) {
|
||||
sike_fp2copy(R->X, pts[npts]->X);
|
||||
sike_fp2copy(R->Z, pts[npts]->Z);
|
||||
pts_index[npts++] = index;
|
||||
m = p503.A_strat[ii++];
|
||||
xDBLe(R, R, A24plus, C24, (2*m));
|
||||
index += m;
|
||||
}
|
||||
get_4_isog(R, A24plus, C24, coeff);
|
||||
|
||||
for (size_t i = 0; i < npts; i++) {
|
||||
eval_4_isog(pts[i], coeff);
|
||||
}
|
||||
eval_4_isog(phiP, coeff);
|
||||
eval_4_isog(phiQ, coeff);
|
||||
eval_4_isog(phiR, coeff);
|
||||
|
||||
sike_fp2copy(pts[npts-1]->X, R->X);
|
||||
sike_fp2copy(pts[npts-1]->Z, R->Z);
|
||||
index = pts_index[npts-1];
|
||||
npts -= 1;
|
||||
}
|
||||
|
||||
get_4_isog(R, A24plus, C24, coeff);
|
||||
eval_4_isog(phiP, coeff);
|
||||
eval_4_isog(phiQ, coeff);
|
||||
eval_4_isog(phiR, coeff);
|
||||
|
||||
inv_3_way(phiP->Z, phiQ->Z, phiR->Z);
|
||||
sike_fp2mul_mont(phiP->X, phiP->Z, phiP->X);
|
||||
sike_fp2mul_mont(phiQ->X, phiQ->Z, phiQ->X);
|
||||
sike_fp2mul_mont(phiR->X, phiR->Z, phiR->X);
|
||||
|
||||
// Format public key
|
||||
sike_fp2_encode(phiP->X, pkA);
|
||||
sike_fp2_encode(phiQ->X, pkA + SIDHp503_JINV_BYTESZ);
|
||||
sike_fp2_encode(phiR->X, pkA + 2*SIDHp503_JINV_BYTESZ);
|
||||
}
|
||||
|
||||
// Bob's ephemeral key-pair generation
|
||||
// It produces a private key skB and computes the public key pkB.
|
||||
// The private key is an integer in the range [0, 2^Floor(Log(2,3^159)) - 1], stored in 32 bytes.
|
||||
// The public key consists of 3 GF(p503^2) elements encoded in 378 bytes.
|
||||
static void gen_iso_B(const uint8_t* skB, uint8_t* pkB)
|
||||
{
|
||||
point_proj_t R, pts[MAX_INT_POINTS_BOB];
|
||||
point_proj_t phiP = POINT_PROJ_INIT;
|
||||
point_proj_t phiQ = POINT_PROJ_INIT;
|
||||
point_proj_t phiR = POINT_PROJ_INIT;
|
||||
f2elm_t XPB, XQB, XRB, coeff[3];
|
||||
f2elm_t A24plus = F2ELM_INIT;
|
||||
f2elm_t A24minus = F2ELM_INIT;
|
||||
f2elm_t A = F2ELM_INIT;
|
||||
unsigned int m, index = 0, pts_index[MAX_INT_POINTS_BOB], npts = 0, ii = 0;
|
||||
|
||||
// Initialize basis points
|
||||
sike_init_basis((crypto_word_t*)p503.B_gen, XPB, XQB, XRB);
|
||||
sike_init_basis((crypto_word_t*)p503.A_gen, phiP->X, phiQ->X, phiR->X);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, (phiP->Z)->c0);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, (phiQ->Z)->c0);
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, (phiR->Z)->c0);
|
||||
|
||||
// Initialize constants
|
||||
sike_fpcopy((crypto_word_t*)&p503.mont_one, A24plus->c0);
|
||||
sike_fp2add(A24plus, A24plus, A24plus);
|
||||
sike_fp2copy(A24plus, A24minus);
|
||||
sike_fp2neg(A24minus);
|
||||
|
||||
// Retrieve kernel point
|
||||
LADDER3PT(XPB, XQB, XRB, (crypto_word_t*)skB, 0, R, A);
|
||||
|
||||
// Traverse tree
|
||||
index = 0;
|
||||
for (size_t row = 1; row < B_max; row++) {
|
||||
while (index < B_max-row) {
|
||||
sike_fp2copy(R->X, pts[npts]->X);
|
||||
sike_fp2copy(R->Z, pts[npts]->Z);
|
||||
pts_index[npts++] = index;
|
||||
m = p503.B_strat[ii++];
|
||||
xTPLe(R, R, A24minus, A24plus, m);
|
||||
index += m;
|
||||
}
|
||||
get_3_isog(R, A24minus, A24plus, coeff);
|
||||
|
||||
for (size_t i = 0; i < npts; i++) {
|
||||
eval_3_isog(pts[i], coeff);
|
||||
}
|
||||
eval_3_isog(phiP, coeff);
|
||||
eval_3_isog(phiQ, coeff);
|
||||
eval_3_isog(phiR, coeff);
|
||||
|
||||
sike_fp2copy(pts[npts-1]->X, R->X);
|
||||
sike_fp2copy(pts[npts-1]->Z, R->Z);
|
||||
index = pts_index[npts-1];
|
||||
npts -= 1;
|
||||
}
|
||||
|
||||
get_3_isog(R, A24minus, A24plus, coeff);
|
||||
eval_3_isog(phiP, coeff);
|
||||
eval_3_isog(phiQ, coeff);
|
||||
eval_3_isog(phiR, coeff);
|
||||
|
||||
inv_3_way(phiP->Z, phiQ->Z, phiR->Z);
|
||||
sike_fp2mul_mont(phiP->X, phiP->Z, phiP->X);
|
||||
sike_fp2mul_mont(phiQ->X, phiQ->Z, phiQ->X);
|
||||
sike_fp2mul_mont(phiR->X, phiR->Z, phiR->X);
|
||||
|
||||
// Format public key
|
||||
sike_fp2_encode(phiP->X, pkB);
|
||||
sike_fp2_encode(phiQ->X, pkB + SIDHp503_JINV_BYTESZ);
|
||||
sike_fp2_encode(phiR->X, pkB + 2*SIDHp503_JINV_BYTESZ);
|
||||
}
|
||||
|
||||
// Alice's ephemeral shared secret computation
|
||||
// It produces a shared secret key ssA using her secret key skA and Bob's public key pkB
|
||||
// Inputs: Alice's skA is an integer in the range [0, 2^250 - 1], stored in 32 bytes.
|
||||
// Bob's pkB consists of 3 GF(p503^2) elements encoded in 378 bytes.
|
||||
// Output: a shared secret ssA that consists of one element in GF(p503^2) encoded in 126 bytes.
|
||||
static void ex_iso_A(const uint8_t* skA, const uint8_t* pkB, uint8_t* ssA)
|
||||
{
|
||||
point_proj_t R, pts[MAX_INT_POINTS_ALICE];
|
||||
f2elm_t coeff[3], PKB[3], jinv;
|
||||
f2elm_t A24plus = F2ELM_INIT;
|
||||
f2elm_t C24 = F2ELM_INIT;
|
||||
f2elm_t A = F2ELM_INIT;
|
||||
unsigned int m, index = 0, pts_index[MAX_INT_POINTS_ALICE], npts = 0, ii = 0;
|
||||
|
||||
// Initialize images of Bob's basis
|
||||
fp2_decode(pkB, PKB[0]);
|
||||
fp2_decode(pkB + SIDHp503_JINV_BYTESZ, PKB[1]);
|
||||
fp2_decode(pkB + 2*SIDHp503_JINV_BYTESZ, PKB[2]);
|
||||
|
||||
// Initialize constants
|
||||
get_A(PKB[0], PKB[1], PKB[2], A); // TODO: Can return projective A?
|
||||
sike_fpadd((crypto_word_t*)&p503.mont_one, (crypto_word_t*)&p503.mont_one, C24->c0);
|
||||
sike_fp2add(A, C24, A24plus);
|
||||
sike_fpadd(C24->c0, C24->c0, C24->c0);
|
||||
|
||||
// Retrieve kernel point
|
||||
LADDER3PT(PKB[0], PKB[1], PKB[2], (crypto_word_t*)skA, 1, R, A);
|
||||
|
||||
// Traverse tree
|
||||
index = 0;
|
||||
for (size_t row = 1; row < A_max; row++) {
|
||||
while (index < A_max-row) {
|
||||
sike_fp2copy(R->X, pts[npts]->X);
|
||||
sike_fp2copy(R->Z, pts[npts]->Z);
|
||||
pts_index[npts++] = index;
|
||||
m = p503.A_strat[ii++];
|
||||
xDBLe(R, R, A24plus, C24, (2*m));
|
||||
index += m;
|
||||
}
|
||||
get_4_isog(R, A24plus, C24, coeff);
|
||||
|
||||
for (size_t i = 0; i < npts; i++) {
|
||||
eval_4_isog(pts[i], coeff);
|
||||
}
|
||||
|
||||
sike_fp2copy(pts[npts-1]->X, R->X);
|
||||
sike_fp2copy(pts[npts-1]->Z, R->Z);
|
||||
index = pts_index[npts-1];
|
||||
npts -= 1;
|
||||
}
|
||||
|
||||
get_4_isog(R, A24plus, C24, coeff);
|
||||
sike_fp2div2(C24, C24);
|
||||
sike_fp2sub(A24plus, C24, A24plus);
|
||||
sike_fp2div2(C24, C24);
|
||||
j_inv(A24plus, C24, jinv);
|
||||
sike_fp2_encode(jinv, ssA);
|
||||
}
|
||||
|
||||
// Bob's ephemeral shared secret computation
|
||||
// It produces a shared secret key ssB using his secret key skB and Alice's public key pkA
|
||||
// Inputs: Bob's skB is an integer in the range [0, 2^Floor(Log(2,3^159)) - 1], stored in 32 bytes.
|
||||
// Alice's pkA consists of 3 GF(p503^2) elements encoded in 378 bytes.
|
||||
// Output: a shared secret ssB that consists of one element in GF(p503^2) encoded in 126 bytes.
|
||||
static void ex_iso_B(const uint8_t* skB, const uint8_t* pkA, uint8_t* ssB)
|
||||
{
|
||||
point_proj_t R, pts[MAX_INT_POINTS_BOB];
|
||||
f2elm_t coeff[3], PKB[3], jinv;
|
||||
f2elm_t A24plus = F2ELM_INIT;
|
||||
f2elm_t A24minus = F2ELM_INIT;
|
||||
f2elm_t A = F2ELM_INIT;
|
||||
unsigned int m, index = 0, pts_index[MAX_INT_POINTS_BOB], npts = 0, ii = 0;
|
||||
|
||||
// Initialize images of Alice's basis
|
||||
fp2_decode(pkA, PKB[0]);
|
||||
fp2_decode(pkA + SIDHp503_JINV_BYTESZ, PKB[1]);
|
||||
fp2_decode(pkA + 2*SIDHp503_JINV_BYTESZ, PKB[2]);
|
||||
|
||||
// Initialize constants
|
||||
get_A(PKB[0], PKB[1], PKB[2], A);
|
||||
sike_fpadd((crypto_word_t*)&p503.mont_one, (crypto_word_t*)&p503.mont_one, A24minus->c0);
|
||||
sike_fp2add(A, A24minus, A24plus);
|
||||
sike_fp2sub(A, A24minus, A24minus);
|
||||
|
||||
// Retrieve kernel point
|
||||
LADDER3PT(PKB[0], PKB[1], PKB[2], (crypto_word_t*)skB, 0, R, A);
|
||||
|
||||
// Traverse tree
|
||||
index = 0;
|
||||
for (size_t row = 1; row < B_max; row++) {
|
||||
while (index < B_max-row) {
|
||||
sike_fp2copy(R->X, pts[npts]->X);
|
||||
sike_fp2copy(R->Z, pts[npts]->Z);
|
||||
pts_index[npts++] = index;
|
||||
m = p503.B_strat[ii++];
|
||||
xTPLe(R, R, A24minus, A24plus, m);
|
||||
index += m;
|
||||
}
|
||||
get_3_isog(R, A24minus, A24plus, coeff);
|
||||
|
||||
for (size_t i = 0; i < npts; i++) {
|
||||
eval_3_isog(pts[i], coeff);
|
||||
}
|
||||
|
||||
sike_fp2copy(pts[npts-1]->X, R->X);
|
||||
sike_fp2copy(pts[npts-1]->Z, R->Z);
|
||||
index = pts_index[npts-1];
|
||||
npts -= 1;
|
||||
}
|
||||
|
||||
get_3_isog(R, A24minus, A24plus, coeff);
|
||||
sike_fp2add(A24plus, A24minus, A);
|
||||
sike_fp2add(A, A, A);
|
||||
sike_fp2sub(A24plus, A24minus, A24plus);
|
||||
j_inv(A, A24plus, jinv);
|
||||
sike_fp2_encode(jinv, ssB);
|
||||
}
|
||||
|
||||
int SIKE_keypair(uint8_t out_priv[SIKEp503_PRV_BYTESZ], uint8_t out_pub[SIKEp503_PUB_BYTESZ]) {
|
||||
int ret = 0;
|
||||
|
||||
BN_CTX *ctx = BN_CTX_new();
|
||||
if (!ctx) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
// Calculate private key for Alice. Needs to be in range [0, 2^0xFA - 1] and < 253 bits
|
||||
BIGNUM *bn_sidh_prv = BN_CTX_get(ctx);
|
||||
if (!bn_sidh_prv) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (!BN_rand(bn_sidh_prv, SIDHp503_PRV_B_BITSZ, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY)) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
// Convert to little endian
|
||||
if (!BN_bn2le_padded(out_priv, BITS_TO_BYTES(SIDHp503_PRV_B_BITSZ), bn_sidh_prv)) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
// Never fails
|
||||
gen_iso_B(out_priv, out_pub);
|
||||
|
||||
// All good
|
||||
ret = 1;
|
||||
|
||||
end:
|
||||
BN_CTX_free(ctx);
|
||||
return ret;
|
||||
}
|
||||
|
||||
void SIKE_encaps(
|
||||
uint8_t out_shared_key[SIKEp503_SS_BYTESZ],
|
||||
uint8_t out_ciphertext[SIKEp503_CT_BYTESZ],
|
||||
const uint8_t pub_key[SIKEp503_PUB_BYTESZ])
|
||||
{
|
||||
// Secret buffer is reused by the function to store some ephemeral
|
||||
// secret data. It's size must be maximum of SHA256_CBLOCK,
|
||||
// SIKEp503_MSG_BYTESZ and SIDHp503_PRV_A_BITSZ in bytes.
|
||||
uint8_t secret[SHA256_CBLOCK];
|
||||
uint8_t j[SIDHp503_JINV_BYTESZ];
|
||||
uint8_t temp[SIKEp503_MSG_BYTESZ + SIKEp503_CT_BYTESZ];
|
||||
SHA256_CTX ctx;
|
||||
|
||||
// Generate secret key for A
|
||||
// secret key A = HMAC({0,1}^n || pub_key), G) mod SIDHp503_PRV_A_BITSZ
|
||||
(void)RAND_bytes(temp, SIKEp503_MSG_BYTESZ);
|
||||
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, temp, SIKEp503_MSG_BYTESZ);
|
||||
SHA256_Update(&ctx, pub_key, SIKEp503_PUB_BYTESZ);
|
||||
SHA256_Final(secret, &ctx);
|
||||
hmac_sum(secret, BITS_TO_BYTES(SIDHp503_PRV_A_BITSZ), G, secret);
|
||||
secret[BITS_TO_BYTES(SIDHp503_PRV_A_BITSZ) - 1] &= (1 << (SIDHp503_PRV_A_BITSZ%8)) - 1;
|
||||
|
||||
// Generate public key for A - first part of the ciphertext
|
||||
gen_iso_A(secret, out_ciphertext);
|
||||
|
||||
// Generate c1:
|
||||
// h = HMAC(j-invariant(secret key A, public key B), F)
|
||||
// c1 = h ^ m
|
||||
ex_iso_A(secret, pub_key, j);
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, j, sizeof(j));
|
||||
SHA256_Final(secret, &ctx);
|
||||
hmac_sum(secret, SIKEp503_MSG_BYTESZ, F, secret);
|
||||
|
||||
// c1 = h ^ m
|
||||
uint8_t *c1 = &out_ciphertext[SIKEp503_PUB_BYTESZ];
|
||||
for (size_t i = 0; i < SIKEp503_MSG_BYTESZ; i++) {
|
||||
c1[i] = temp[i] ^ secret[i];
|
||||
}
|
||||
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, temp, SIKEp503_MSG_BYTESZ);
|
||||
SHA256_Update(&ctx, out_ciphertext, SIKEp503_CT_BYTESZ);
|
||||
SHA256_Final(secret, &ctx);
|
||||
// Generate shared secret out_shared_key = HMAC(m||out_ciphertext, F)
|
||||
hmac_sum(out_shared_key, SIKEp503_SS_BYTESZ, H, secret);
|
||||
}
|
||||
|
||||
void SIKE_decaps(
|
||||
uint8_t out_shared_key[SIKEp503_SS_BYTESZ],
|
||||
const uint8_t ciphertext[SIKEp503_CT_BYTESZ],
|
||||
const uint8_t pub_key[SIKEp503_PUB_BYTESZ],
|
||||
const uint8_t priv_key[SIKEp503_PRV_BYTESZ])
|
||||
{
|
||||
// Secret buffer is reused by the function to store some ephemeral
|
||||
// secret data. It's size must be maximum of SHA256_CBLOCK,
|
||||
// SIKEp503_MSG_BYTESZ and SIDHp503_PRV_A_BITSZ in bytes.
|
||||
uint8_t secret[SHA256_CBLOCK];
|
||||
uint8_t j[SIDHp503_JINV_BYTESZ];
|
||||
uint8_t c0[SIKEp503_PUB_BYTESZ];
|
||||
uint8_t temp[SIKEp503_MSG_BYTESZ];
|
||||
uint8_t shared_nok[SIKEp503_MSG_BYTESZ];
|
||||
SHA256_CTX ctx;
|
||||
|
||||
(void)RAND_bytes(shared_nok, SIKEp503_MSG_BYTESZ);
|
||||
|
||||
// Recover m
|
||||
// Let ciphertext = c0 || c1 - both have fixed sizes
|
||||
// m = F(j-invariant(c0, priv_key)) ^ c1
|
||||
ex_iso_B(priv_key, ciphertext, j);
|
||||
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, j, sizeof(j));
|
||||
SHA256_Final(secret, &ctx);
|
||||
hmac_sum(secret, SIKEp503_MSG_BYTESZ, F, secret);
|
||||
|
||||
const uint8_t *c1 = &ciphertext[sizeof(c0)];
|
||||
for (size_t i = 0; i < SIKEp503_MSG_BYTESZ; i++) {
|
||||
temp[i] = c1[i] ^ secret[i];
|
||||
}
|
||||
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, temp, SIKEp503_MSG_BYTESZ);
|
||||
SHA256_Update(&ctx, pub_key, SIKEp503_PUB_BYTESZ);
|
||||
SHA256_Final(secret, &ctx);
|
||||
hmac_sum(secret, BITS_TO_BYTES(SIDHp503_PRV_A_BITSZ), G, secret);
|
||||
|
||||
// Recover secret key A = G(m||pub_key) mod
|
||||
secret[BITS_TO_BYTES(SIDHp503_PRV_A_BITSZ) - 1] &= (1 << (SIDHp503_PRV_A_BITSZ%8)) - 1;
|
||||
|
||||
// Recover c0 = public key A
|
||||
gen_iso_A(secret, c0);
|
||||
crypto_word_t ok = constant_time_is_zero_w(CRYPTO_memcmp(c0, ciphertext, SIKEp503_PUB_BYTESZ));
|
||||
for (size_t i=0; i<SIKEp503_MSG_BYTESZ; i++) {
|
||||
temp[i] = constant_time_select_8(ok, temp[i], shared_nok[i]);
|
||||
}
|
||||
|
||||
SHA256_Init(&ctx);
|
||||
SHA256_Update(&ctx, temp, SIKEp503_MSG_BYTESZ);
|
||||
SHA256_Update(&ctx, ciphertext, SIKEp503_CT_BYTESZ);
|
||||
SHA256_Final(secret, &ctx);
|
||||
hmac_sum(out_shared_key, SIKEp503_SS_BYTESZ, H, secret);
|
||||
}
|
||||
190
third_party/sike/src/sike_test.cc
vendored
Normal file
190
third_party/sike/src/sike_test.cc
vendored
Normal file
@ -0,0 +1,190 @@
|
||||
/* Copyright (c) 2018, Google Inc.
|
||||
*
|
||||
* Permission to use, copy, modify, and/or distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
||||
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
||||
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
||||
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
|
||||
|
||||
#include <stdint.h>
|
||||
#include <gtest/gtest.h>
|
||||
#include "../include/sike/sike.h"
|
||||
|
||||
TEST(SIKE, RoundTrip) {
|
||||
uint8_t sk[SIKEp503_PRV_BYTESZ] = {0};
|
||||
uint8_t pk[SIKEp503_PUB_BYTESZ] = {0};
|
||||
uint8_t ct[SIKEp503_CT_BYTESZ] = {0};
|
||||
uint8_t ss_enc[SIKEp503_SS_BYTESZ] = {0};
|
||||
uint8_t ss_dec[SIKEp503_SS_BYTESZ] = {0};
|
||||
|
||||
EXPECT_EQ(SIKE_keypair(sk, pk), 1);
|
||||
SIKE_encaps(ss_enc, ct, pk);
|
||||
SIKE_decaps(ss_dec, ct, pk, sk);
|
||||
|
||||
EXPECT_EQ(memcmp(ss_enc, ss_dec, SIKEp503_SS_BYTESZ), 0);
|
||||
}
|
||||
|
||||
TEST(SIKE, Decapsulation) {
|
||||
const uint8_t sk[SIKEp503_PRV_BYTESZ] = {
|
||||
0xDB, 0xAF, 0x2C, 0x89, 0xCA, 0x5A, 0xD4, 0x9D, 0x4F, 0x13,
|
||||
0x40, 0xDF, 0x2D, 0xB1, 0x5F, 0x4C, 0x91, 0xA7, 0x1F, 0x0B,
|
||||
0x29, 0x15, 0x01, 0x59, 0xBC, 0x5F, 0x0B, 0x4A, 0x03, 0x27,
|
||||
0x6F, 0x18};
|
||||
|
||||
const uint8_t pk[SIKEp503_PUB_BYTESZ] = {
|
||||
0x07, 0xAA, 0x51, 0x45, 0x3E, 0x1F, 0x53, 0x2A, 0x0A, 0x05,
|
||||
0x46, 0xF6, 0x54, 0x7F, 0x5D, 0x56, 0xD6, 0x76, 0xD3, 0xEA,
|
||||
0x4B, 0x6B, 0x01, 0x9B, 0x11, 0x72, 0x6F, 0x75, 0xEA, 0x34,
|
||||
0x3C, 0x28, 0x2C, 0x36, 0xFD, 0x77, 0xDA, 0xBE, 0xB6, 0x20,
|
||||
0x18, 0xC1, 0x93, 0x98, 0x18, 0x86, 0x30, 0x2F, 0x2E, 0xD2,
|
||||
0x00, 0x61, 0xFF, 0xAE, 0x78, 0xAE, 0xFB, 0x6F, 0x32, 0xAC,
|
||||
0x06, 0xBF, 0x35, 0xF6, 0xF7, 0x5B, 0x98, 0x26, 0x95, 0xC2,
|
||||
0xD8, 0xD6, 0x1C, 0x0E, 0x47, 0xDA, 0x76, 0xCE, 0xB5, 0xF1,
|
||||
0x19, 0xCC, 0x01, 0xE1, 0x17, 0xA9, 0x62, 0xF7, 0x82, 0x6C,
|
||||
0x25, 0x51, 0x25, 0xAE, 0xFE, 0xE3, 0xE2, 0xE1, 0x35, 0xAE,
|
||||
0x2E, 0x8F, 0x38, 0xE0, 0x7C, 0x74, 0x3C, 0x1D, 0x39, 0x91,
|
||||
0x1B, 0xC7, 0x9F, 0x8E, 0x33, 0x4E, 0x84, 0x19, 0xB8, 0xD9,
|
||||
0xC2, 0x71, 0x35, 0x02, 0x47, 0x3E, 0x79, 0xEF, 0x47, 0xE1,
|
||||
0xD8, 0x21, 0x96, 0x1F, 0x11, 0x59, 0x39, 0x34, 0x76, 0xEF,
|
||||
0x3E, 0xB7, 0x4E, 0xFB, 0x7C, 0x55, 0xA1, 0x85, 0xAA, 0xAB,
|
||||
0xAD, 0xF0, 0x09, 0xCB, 0xD1, 0xE3, 0x7C, 0x4F, 0x5D, 0x2D,
|
||||
0xE1, 0x13, 0xF0, 0x71, 0xD9, 0xE5, 0xF6, 0xAF, 0x7F, 0xC1,
|
||||
0x27, 0x95, 0x8D, 0x52, 0xD5, 0x96, 0x42, 0x38, 0x41, 0xF7,
|
||||
0x24, 0x3F, 0x3A, 0xB5, 0x7E, 0x11, 0xE4, 0xF9, 0x33, 0xEE,
|
||||
0x4D, 0xBE, 0x74, 0x48, 0xF9, 0x98, 0x04, 0x01, 0x16, 0xEB,
|
||||
0xA9, 0x0D, 0x61, 0xC6, 0xFD, 0x4C, 0xCF, 0x98, 0x84, 0x4A,
|
||||
0x94, 0xAC, 0x69, 0x2C, 0x02, 0x8B, 0xE3, 0xD1, 0x41, 0x0D,
|
||||
0xF2, 0x2D, 0x46, 0x1F, 0x57, 0x1C, 0x77, 0x86, 0x18, 0xE3,
|
||||
0x63, 0xDE, 0xF3, 0xE3, 0x02, 0x30, 0x54, 0x73, 0xAE, 0xC2,
|
||||
0x32, 0xA2, 0xCE, 0xEB, 0xCF, 0x81, 0x46, 0x54, 0x5C, 0xF4,
|
||||
0x5D, 0x2A, 0x03, 0x5D, 0x9C, 0xAE, 0xE0, 0x60, 0x03, 0x80,
|
||||
0x11, 0x30, 0xA5, 0xAA, 0xD1, 0x75, 0x67, 0xE0, 0x1C, 0x2B,
|
||||
0x6B, 0x5D, 0x83, 0xDE, 0x92, 0x9B, 0x0E, 0xD7, 0x11, 0x0F,
|
||||
0x00, 0xC4, 0x59, 0xE4, 0x81, 0x04, 0x3B, 0xEE, 0x5C, 0x04,
|
||||
0xD1, 0x0E, 0xD0, 0x67, 0xF5, 0xCC, 0xAA, 0x72, 0x73, 0xEA,
|
||||
0xC4, 0x76, 0x99, 0x3B, 0x4C, 0x90, 0x2F, 0xCB, 0xD8, 0x0A,
|
||||
0x5B, 0xEC, 0x0E, 0x0E, 0x1F, 0x59, 0xEA, 0x14, 0x8D, 0x34,
|
||||
0x53, 0x65, 0x4C, 0x1A, 0x59, 0xA8, 0x95, 0x66, 0x60, 0xBB,
|
||||
0xC4, 0xCC, 0x32, 0xA9, 0x8D, 0x2A, 0xAA, 0x14, 0x6F, 0x0F,
|
||||
0x81, 0x4D, 0x32, 0x02, 0xFD, 0x33, 0x58, 0x42, 0xCF, 0xF3,
|
||||
0x67, 0xD0, 0x9F, 0x0B, 0xB1, 0xCC, 0x18, 0xA5, 0xC4, 0x19,
|
||||
0xB6, 0x00, 0xED, 0xFA, 0x32, 0x1A, 0x5F, 0x67, 0xC8, 0xC3,
|
||||
0xEB, 0x0D, 0xB5, 0x9A, 0x36, 0x47, 0x82, 0x00};
|
||||
|
||||
const uint8_t ct_exp[SIKEp503_CT_BYTESZ] = {
|
||||
0xE6, 0xB7, 0xE5, 0x7B, 0xA9, 0x19, 0xD1, 0x2C, 0xB8, 0x5C,
|
||||
0x7B, 0x66, 0x74, 0xB0, 0x71, 0xA1, 0xFF, 0x71, 0x7F, 0x4B,
|
||||
0xB5, 0xA6, 0xAF, 0x48, 0x32, 0x52, 0xD5, 0x82, 0xEE, 0x8A,
|
||||
0xBB, 0x08, 0x1E, 0xF6, 0xAC, 0x91, 0xA2, 0xCB, 0x6B, 0x6A,
|
||||
0x09, 0x2B, 0xD9, 0xC6, 0x27, 0xD6, 0x3A, 0x6B, 0x8D, 0xFC,
|
||||
0xB8, 0x90, 0x8F, 0x72, 0xB3, 0xFA, 0x7D, 0x34, 0x7A, 0xC4,
|
||||
0x7E, 0xE3, 0x30, 0xC5, 0xA0, 0xFE, 0x3D, 0x43, 0x14, 0x4E,
|
||||
0x3A, 0x14, 0x76, 0x3E, 0xFB, 0xDF, 0xE3, 0xA8, 0xE3, 0x5E,
|
||||
0x38, 0xF2, 0xE0, 0x39, 0x67, 0x60, 0xFD, 0xFB, 0xB4, 0x19,
|
||||
0xCD, 0xE1, 0x93, 0xA2, 0x06, 0xCC, 0x65, 0xCD, 0x6E, 0xC8,
|
||||
0xB4, 0x5E, 0x41, 0x4B, 0x6C, 0xA5, 0xF4, 0xE4, 0x9D, 0x52,
|
||||
0x8C, 0x25, 0x60, 0xDD, 0x3D, 0xA9, 0x7F, 0xF2, 0x88, 0xC1,
|
||||
0x0C, 0xEE, 0x97, 0xE0, 0xE7, 0x3B, 0xB7, 0xD3, 0x6F, 0x28,
|
||||
0x79, 0x2F, 0x50, 0xB2, 0x4F, 0x74, 0x3A, 0x0C, 0x88, 0x27,
|
||||
0x98, 0x3A, 0x27, 0xD3, 0x26, 0x83, 0x59, 0x49, 0x81, 0x5B,
|
||||
0x0D, 0xA7, 0x0C, 0x4F, 0xEF, 0xFB, 0x1E, 0xAF, 0xE9, 0xD2,
|
||||
0x1C, 0x10, 0x25, 0xEC, 0x9E, 0xFA, 0x57, 0x36, 0xAA, 0x3F,
|
||||
0xC1, 0xA3, 0x2C, 0xE9, 0xB5, 0xC9, 0xED, 0x72, 0x51, 0x4C,
|
||||
0x02, 0xB4, 0x7B, 0xB3, 0xED, 0x9F, 0x45, 0x03, 0x34, 0xAC,
|
||||
0x9A, 0x9E, 0x62, 0x5F, 0x82, 0x7A, 0x77, 0x34, 0xF9, 0x21,
|
||||
0x94, 0xD2, 0x38, 0x3D, 0x05, 0xF0, 0x8A, 0x60, 0x1C, 0xB7,
|
||||
0x1D, 0xF5, 0xB7, 0x53, 0x77, 0xD3, 0x9D, 0x3D, 0x70, 0x6A,
|
||||
0xCB, 0x18, 0x20, 0x6B, 0x29, 0x17, 0x3A, 0x6D, 0xA1, 0xB2,
|
||||
0x64, 0xDB, 0x6C, 0xE6, 0x1A, 0x95, 0xA7, 0xF4, 0x1A, 0x78,
|
||||
0x1D, 0xA2, 0x40, 0x15, 0x41, 0x59, 0xDD, 0xEE, 0x23, 0x57,
|
||||
0xCE, 0x36, 0x0D, 0x55, 0xBD, 0xB8, 0xFD, 0x0F, 0x35, 0xBD,
|
||||
0x5B, 0x92, 0xD6, 0x1C, 0x84, 0x8C, 0x32, 0x64, 0xA6, 0x5C,
|
||||
0x45, 0x18, 0x07, 0x6B, 0xF9, 0xA9, 0x43, 0x9A, 0x83, 0xCD,
|
||||
0xB5, 0xB3, 0xD9, 0x17, 0x99, 0x2C, 0x2A, 0x8B, 0xE0, 0x8E,
|
||||
0xAF, 0xA6, 0x4C, 0x95, 0xBB, 0x70, 0x60, 0x1A, 0x3A, 0x97,
|
||||
0xAA, 0x2F, 0x3D, 0x22, 0x83, 0xB7, 0x4F, 0x59, 0xED, 0x3F,
|
||||
0x4E, 0xF4, 0x19, 0xC6, 0x25, 0x0B, 0x0A, 0x5E, 0x21, 0xB9,
|
||||
0x91, 0xB8, 0x19, 0x84, 0x48, 0x78, 0xCE, 0x27, 0xBF, 0x41,
|
||||
0x89, 0xF6, 0x30, 0xFD, 0x6B, 0xD9, 0xB8, 0x1D, 0x72, 0x8A,
|
||||
0x56, 0xCC, 0x2F, 0x82, 0xE4, 0x46, 0x4D, 0x75, 0xD8, 0x92,
|
||||
0xE6, 0x9C, 0xCC, 0xD2, 0xCD, 0x35, 0xE4, 0xFC, 0x2A, 0x85,
|
||||
0x6B, 0xA9, 0xB2, 0x27, 0xC9, 0xA1, 0xFF, 0xB3, 0x96, 0x3E,
|
||||
0x59, 0xF6, 0x4C, 0x66, 0x56, 0x2E, 0xF5, 0x1B, 0x97, 0x32,
|
||||
0xB0, 0x71, 0x5A, 0x9C, 0x50, 0x4B, 0x6F, 0xC4, 0xCA, 0x94,
|
||||
0x75, 0x37, 0x46, 0x10, 0x12, 0x2F, 0x4F, 0xA3, 0x82, 0xCD,
|
||||
0xBD, 0x7C};
|
||||
|
||||
const uint8_t ss_exp[SIKEp503_SS_BYTESZ] = {
|
||||
0x74, 0x3D, 0x25, 0x36, 0x00, 0x24, 0x63, 0x1A, 0x39, 0x1A,
|
||||
0xB4, 0xAD, 0x01, 0x17, 0x78, 0xE9};
|
||||
|
||||
uint8_t ss_dec[SIKEp503_SS_BYTESZ] = {0};
|
||||
SIKE_decaps(ss_dec, ct_exp, pk, sk);
|
||||
EXPECT_EQ(memcmp(ss_dec, ss_exp, sizeof(ss_exp)), 0);
|
||||
}
|
||||
|
||||
// SIKE_encaps and SIKE_keypair doesn't return zeros.
|
||||
TEST(SIKE, NonZero) {
|
||||
uint8_t sk[SIKEp503_PRV_BYTESZ] = {0};
|
||||
uint8_t pk[SIKEp503_PUB_BYTESZ] = {0};
|
||||
uint8_t ct[SIKEp503_CT_BYTESZ] = {0};
|
||||
uint8_t ss[SIKEp503_SS_BYTESZ] = {0};
|
||||
|
||||
// Check secret and public key returned by SIKE_keypair
|
||||
EXPECT_EQ(SIKE_keypair(sk, pk), 1);
|
||||
uint8_t tmp = 0;
|
||||
for (size_t i=0; i<sizeof(sk); i++) tmp|=sk[i];
|
||||
EXPECT_NE(tmp, 0);
|
||||
|
||||
tmp = 0;
|
||||
for (size_t i=0; i<sizeof(pk); i++) tmp|=pk[i];
|
||||
EXPECT_NE(tmp, 0);
|
||||
|
||||
// Check shared secret and ciphertext returned by SIKE_encaps
|
||||
SIKE_encaps(ss, ct, pk);
|
||||
tmp = 0;
|
||||
for (size_t i=0; i<sizeof(ct); i++) tmp|=ct[i];
|
||||
EXPECT_NE(tmp, 0);
|
||||
|
||||
tmp = 0;
|
||||
for (size_t i=0; i<sizeof(ss); i++) tmp|=ss[i];
|
||||
EXPECT_NE(tmp, 0);
|
||||
}
|
||||
|
||||
TEST(SIKE, Negative) {
|
||||
uint8_t sk[SIKEp503_PRV_BYTESZ] = {0};
|
||||
uint8_t pk[SIKEp503_PUB_BYTESZ] = {0};
|
||||
uint8_t ct[SIKEp503_CT_BYTESZ] = {0};
|
||||
uint8_t ss_enc[SIKEp503_SS_BYTESZ] = {0};
|
||||
uint8_t ss_dec[SIKEp503_SS_BYTESZ] = {0};
|
||||
|
||||
EXPECT_EQ(SIKE_keypair(sk, pk), 1);
|
||||
SIKE_encaps(ss_enc, ct, pk);
|
||||
|
||||
// Change cipertext
|
||||
uint8_t ct_tmp[SIKEp503_CT_BYTESZ] = {0};
|
||||
memcpy(ct_tmp, ct, sizeof(ct));
|
||||
ct_tmp[0] = ~ct_tmp[0];
|
||||
SIKE_decaps(ss_dec, ct_tmp, pk, sk);
|
||||
EXPECT_NE(memcmp(ss_enc, ss_dec, SIKEp503_SS_BYTESZ), 0);
|
||||
|
||||
// Change secret key
|
||||
uint8_t sk_tmp[SIKEp503_PRV_BYTESZ] = {0};
|
||||
memcpy(sk_tmp, sk, sizeof(sk));
|
||||
sk_tmp[0] = ~sk_tmp[0];
|
||||
SIKE_decaps(ss_dec, ct, pk, sk_tmp);
|
||||
EXPECT_NE(memcmp(ss_enc, ss_dec, SIKEp503_SS_BYTESZ), 0);
|
||||
|
||||
// Change public key
|
||||
uint8_t pk_tmp[SIKEp503_PUB_BYTESZ] = {0};
|
||||
memcpy(pk_tmp, pk, sizeof(pk));
|
||||
pk_tmp[0] = ~pk_tmp[0];
|
||||
SIKE_decaps(ss_dec, ct, pk_tmp, sk);
|
||||
EXPECT_NE(memcmp(ss_enc, ss_dec, SIKEp503_SS_BYTESZ), 0);
|
||||
}
|
||||
144
third_party/sike/src/utils.h
vendored
Normal file
144
third_party/sike/src/utils.h
vendored
Normal file
@ -0,0 +1,144 @@
|
||||
/********************************************************************************************
|
||||
* SIDH: an efficient supersingular isogeny cryptography library
|
||||
*
|
||||
* Abstract: internal header file for P503
|
||||
*********************************************************************************************/
|
||||
|
||||
#ifndef UTILS_H_
|
||||
#define UTILS_H_
|
||||
|
||||
#include <stdbool.h>
|
||||
#include "openssl/base.h"
|
||||
#include "../crypto/internal.h"
|
||||
#include "sike/sike.h"
|
||||
|
||||
// Conversion macro from number of bits to number of bytes
|
||||
#define BITS_TO_BYTES(nbits) (((nbits)+7)/8)
|
||||
|
||||
// Bit size of the field
|
||||
#define BITS_FIELD 503
|
||||
// Byte size of the field
|
||||
#define FIELD_BYTESZ BITS_TO_BYTES(BITS_FIELD)
|
||||
// Number of 64-bit words of a 503-bit field element
|
||||
#define NWORDS64_FIELD ((BITS_FIELD+63)/64)
|
||||
// Number of 64-bit words of a 256-bit element
|
||||
#define NBITS_ORDER 256
|
||||
#define NWORDS64_ORDER ((NBITS_ORDER+63)/64)
|
||||
// Number of elements in Alice's strategy
|
||||
#define A_max 125
|
||||
// Number of elements in Bob's strategy
|
||||
#define B_max 159
|
||||
// Word size size
|
||||
#define RADIX sizeof(crypto_word_t)*8
|
||||
// Byte size of a limb
|
||||
#define LSZ sizeof(crypto_word_t)
|
||||
|
||||
#if defined(OPENSSL_64_BIT)
|
||||
// Number of words of a 503-bit field element
|
||||
#define NWORDS_FIELD 8
|
||||
// Number of "0" digits in the least significant part of p503 + 1
|
||||
#define p503_ZERO_WORDS 3
|
||||
// log_2(RADIX)
|
||||
#define LOG2RADIX 6
|
||||
#else
|
||||
// Number of words of a 503-bit field element
|
||||
#define NWORDS_FIELD 16
|
||||
// Number of "0" digits in the least significant part of p503 + 1
|
||||
#define p503_ZERO_WORDS 7
|
||||
// log_2(RADIX)
|
||||
#define LOG2RADIX 5
|
||||
#endif
|
||||
|
||||
// Extended datatype support
|
||||
#if !defined(BORINGSSL_HAS_UINT128)
|
||||
typedef uint64_t uint128_t[2];
|
||||
#endif
|
||||
|
||||
// The following functions return 1 (TRUE) if condition is true, 0 (FALSE) otherwise
|
||||
// Digit multiplication
|
||||
#define MUL(multiplier, multiplicand, hi, lo) digit_x_digit((multiplier), (multiplicand), &(lo));
|
||||
|
||||
// If mask |x|==0xff.ff set |x| to 1, otherwise 0
|
||||
#define M2B(x) ((x)>>(RADIX-1))
|
||||
|
||||
// Digit addition with carry
|
||||
#define ADDC(carryIn, addend1, addend2, carryOut, sumOut) \
|
||||
do { \
|
||||
crypto_word_t tempReg = (addend1) + (crypto_word_t)(carryIn); \
|
||||
(sumOut) = (addend2) + tempReg; \
|
||||
(carryOut) = M2B(constant_time_lt_w(tempReg, (crypto_word_t)(carryIn)) | \
|
||||
constant_time_lt_w((sumOut), tempReg)); \
|
||||
} while(0)
|
||||
|
||||
// Digit subtraction with borrow
|
||||
#define SUBC(borrowIn, minuend, subtrahend, borrowOut, differenceOut) \
|
||||
do { \
|
||||
crypto_word_t tempReg = (minuend) - (subtrahend); \
|
||||
crypto_word_t borrowReg = M2B(constant_time_lt_w((minuend), (subtrahend))); \
|
||||
borrowReg |= ((borrowIn) & constant_time_is_zero_w(tempReg)); \
|
||||
(differenceOut) = tempReg - (crypto_word_t)(borrowIn); \
|
||||
(borrowOut) = borrowReg; \
|
||||
} while(0)
|
||||
|
||||
/* Old GCC 4.9 (jessie) doesn't implement {0} initialization properly,
|
||||
which violates C11 as described in 6.7.9, 21 (similarily C99, 6.7.8).
|
||||
Defines below are used to work around the bug, and provide a way
|
||||
to initialize f2elem_t and point_proj_t structs.
|
||||
Bug has been fixed in GCC6 (debian stretch).
|
||||
*/
|
||||
#define F2ELM_INIT {{ {0}, {0} }}
|
||||
#define POINT_PROJ_INIT {{ F2ELM_INIT, F2ELM_INIT }}
|
||||
|
||||
// Datatype for representing 503-bit field elements (512-bit max.)
|
||||
// Elements over GF(p503) are encoded in 63 octets in little endian format
|
||||
// (i.e., the least significant octet is located in the lowest memory address).
|
||||
typedef crypto_word_t felm_t[NWORDS_FIELD];
|
||||
|
||||
// An element in F_{p^2}, is composed of two coefficients from F_p, * i.e.
|
||||
// Fp2 element = c0 + c1*i in F_{p^2}
|
||||
// Datatype for representing double-precision 2x503-bit field elements (512-bit max.)
|
||||
// Elements (a+b*i) over GF(p503^2), where a and b are defined over GF(p503), are
|
||||
// encoded as {a, b}, with a in the lowest memory portion.
|
||||
typedef struct {
|
||||
felm_t c0;
|
||||
felm_t c1;
|
||||
} fp2;
|
||||
|
||||
// Our F_{p^2} element type is a pointer to the struct.
|
||||
typedef fp2 f2elm_t[1];
|
||||
|
||||
// Datatype for representing double-precision 2x503-bit
|
||||
// field elements in contiguous memory.
|
||||
typedef crypto_word_t dfelm_t[2*NWORDS_FIELD];
|
||||
|
||||
// Constants used during SIKEp503 computation.
|
||||
struct params_t {
|
||||
// Stores P503 prime
|
||||
const uint64_t prime[NWORDS64_FIELD];
|
||||
// Stores P503 + 1
|
||||
const uint64_t prime_p1[NWORDS64_FIELD];
|
||||
// Stores P503 * 2
|
||||
const uint64_t prime_x2[NWORDS64_FIELD];
|
||||
// Alice's generator values {XPA0 + XPA1*i, XQA0, XRA0 + XRA1*i}
|
||||
// in GF(p503^2), expressed in Montgomery representation
|
||||
const uint64_t A_gen[5*NWORDS64_FIELD];
|
||||
// Bob's generator values {XPB0 + XPB1*i, XQB0, XRB0 + XRB1*i}
|
||||
// in GF(p503^2), expressed in Montgomery representation
|
||||
const uint64_t B_gen[5*NWORDS64_FIELD];
|
||||
// Montgomery constant mont_R2 = (2^512)^2 mod p503
|
||||
const uint64_t mont_R2[NWORDS64_FIELD];
|
||||
// Value 'one' in Montgomery representation
|
||||
const uint64_t mont_one[NWORDS64_FIELD];
|
||||
// Fixed parameters for isogeny tree computation
|
||||
const unsigned int A_strat[A_max-1];
|
||||
const unsigned int B_strat[B_max-1];
|
||||
};
|
||||
|
||||
// Point representation in projective XZ Montgomery coordinates.
|
||||
typedef struct {
|
||||
f2elm_t X;
|
||||
f2elm_t Z;
|
||||
} point_proj;
|
||||
typedef point_proj point_proj_t[1];
|
||||
|
||||
#endif // UTILS_H_
|
||||
@ -51,6 +51,8 @@ OPENSSL_MSVC_PRAGMA(warning(pop))
|
||||
#include "../crypto/internal.h"
|
||||
#include "internal.h"
|
||||
|
||||
#include "../third_party/sike/include/sike/sike.h"
|
||||
|
||||
|
||||
// TimeResults represents the results of benchmarking a function.
|
||||
struct TimeResults {
|
||||
@ -294,6 +296,64 @@ static bool SpeedRSAKeyGen(const std::string &selected) {
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool SpeedSIKEP503(const std::string &selected) {
|
||||
if (!selected.empty() && selected.find("SIKE") == std::string::npos) {
|
||||
return true;
|
||||
}
|
||||
// speed generation
|
||||
uint8_t public_SIKE[SIKEp503_PUB_BYTESZ];
|
||||
uint8_t private_SIKE[SIKEp503_PRV_BYTESZ];
|
||||
uint8_t ct[SIKEp503_CT_BYTESZ];
|
||||
bool res;
|
||||
|
||||
{
|
||||
TimeResults results;
|
||||
res = TimeFunction(&results,
|
||||
[&private_SIKE, &public_SIKE]() -> bool {
|
||||
return (SIKE_keypair(private_SIKE, public_SIKE) == 1);
|
||||
});
|
||||
results.Print("SIKE/P503 generate");
|
||||
}
|
||||
|
||||
if (!res) {
|
||||
fprintf(stderr, "Failed to time SIKE_keypair.\n");
|
||||
return false;
|
||||
}
|
||||
|
||||
{
|
||||
TimeResults results;
|
||||
TimeFunction(&results,
|
||||
[&ct, &public_SIKE]() -> bool {
|
||||
uint8_t ss[SIKEp503_SS_BYTESZ];
|
||||
SIKE_encaps(ss, ct, public_SIKE);
|
||||
return true;
|
||||
});
|
||||
results.Print("SIKE/P503 encap");
|
||||
}
|
||||
|
||||
if (!res) {
|
||||
fprintf(stderr, "Failed to time SIKE_encaps.\n");
|
||||
return false;
|
||||
}
|
||||
|
||||
{
|
||||
TimeResults results;
|
||||
TimeFunction(&results,
|
||||
[&ct, &public_SIKE, &private_SIKE]() -> bool {
|
||||
uint8_t ss[SIKEp503_SS_BYTESZ];
|
||||
SIKE_decaps(ss, ct, public_SIKE, private_SIKE);
|
||||
return true;
|
||||
});
|
||||
results.Print("SIKE/P503 decap");
|
||||
}
|
||||
|
||||
if (!res) {
|
||||
fprintf(stderr, "Failed to time SIKE_decaps.\n");
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static uint8_t *align(uint8_t *in, unsigned alignment) {
|
||||
return reinterpret_cast<uint8_t *>(
|
||||
(reinterpret_cast<uintptr_t>(in) + alignment) &
|
||||
@ -938,6 +998,7 @@ bool Speed(const std::vector<std::string> &args) {
|
||||
!SpeedECDH(selected) ||
|
||||
!SpeedECDSA(selected) ||
|
||||
!Speed25519(selected) ||
|
||||
!SpeedSIKEP503(selected) ||
|
||||
!SpeedSPAKE2(selected) ||
|
||||
!SpeedScrypt(selected) ||
|
||||
!SpeedRSAKeyGen(selected) ||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user