915c121bb5
These date to the old code and have been replaced by the fe and fe_loose bounds in the header file. Also fix up a comment that the comment converter didn't manage to convert. Change-Id: I2e3ea867a8cea2b347d09c304a17e532b2e36545 Reviewed-on: https://boringssl-review.googlesource.com/24525 Commit-Queue: Adam Langley <agl@google.com> Reviewed-by: Adam Langley <agl@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
143 lines
4.4 KiB
C
143 lines
4.4 KiB
C
// The MIT License (MIT)
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//
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// Copyright (c) 2015-2016 the fiat-crypto authors (see the AUTHORS file).
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//
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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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//
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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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//
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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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#ifndef OPENSSL_HEADER_CURVE25519_INTERNAL_H
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#define OPENSSL_HEADER_CURVE25519_INTERNAL_H
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#if defined(OPENSSL_X86_64) && !defined(OPENSSL_SMALL) && \
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!defined(OPENSSL_WINDOWS) && !defined(OPENSSL_NO_ASM)
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#define BORINGSSL_X25519_X86_64
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void x25519_x86_64(uint8_t out[32], const uint8_t scalar[32],
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const uint8_t point[32]);
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#endif
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#if defined(OPENSSL_ARM) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_APPLE)
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#define BORINGSSL_X25519_NEON
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// x25519_NEON is defined in asm/x25519-arm.S.
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void x25519_NEON(uint8_t out[32], const uint8_t scalar[32],
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const uint8_t point[32]);
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#endif
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// fe means field element. Here the field is \Z/(2^255-19). An element t,
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// entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77
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// t[3]+2^102 t[4]+...+2^230 t[9].
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// fe limbs are bounded by 1.125*2^26,1.125*2^25,1.125*2^26,1.125*2^25,etc.
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// Multiplication and carrying produce fe from fe_loose.
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typedef struct fe { uint32_t v[10]; } fe;
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// fe_loose limbs are bounded by 3.375*2^26,3.375*2^25,3.375*2^26,3.375*2^25,etc.
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// Addition and subtraction produce fe_loose from (fe, fe).
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typedef struct fe_loose { uint32_t v[10]; } fe_loose;
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// ge means group element.
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//
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// Here the group is the set of pairs (x,y) of field elements (see fe.h)
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// satisfying -x^2 + y^2 = 1 + d x^2y^2
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// where d = -121665/121666.
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//
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// Representations:
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// ge_p2 (projective): (X:Y:Z) satisfying x=X/Z, y=Y/Z
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// ge_p3 (extended): (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT
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// ge_p1p1 (completed): ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T
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// ge_precomp (Duif): (y+x,y-x,2dxy)
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typedef struct {
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fe X;
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fe Y;
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fe Z;
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} ge_p2;
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typedef struct {
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fe X;
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fe Y;
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fe Z;
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fe T;
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} ge_p3;
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typedef struct {
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fe_loose X;
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fe_loose Y;
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fe_loose Z;
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fe_loose T;
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} ge_p1p1;
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typedef struct {
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fe_loose yplusx;
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fe_loose yminusx;
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fe_loose xy2d;
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} ge_precomp;
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typedef struct {
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fe_loose YplusX;
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fe_loose YminusX;
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fe_loose Z;
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fe_loose T2d;
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} ge_cached;
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void x25519_ge_tobytes(uint8_t s[32], const ge_p2 *h);
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int x25519_ge_frombytes_vartime(ge_p3 *h, const uint8_t *s);
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void x25519_ge_p3_to_cached(ge_cached *r, const ge_p3 *p);
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void x25519_ge_p1p1_to_p2(ge_p2 *r, const ge_p1p1 *p);
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void x25519_ge_p1p1_to_p3(ge_p3 *r, const ge_p1p1 *p);
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void x25519_ge_add(ge_p1p1 *r, const ge_p3 *p, const ge_cached *q);
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void x25519_ge_sub(ge_p1p1 *r, const ge_p3 *p, const ge_cached *q);
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void x25519_ge_scalarmult_small_precomp(
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ge_p3 *h, const uint8_t a[32], const uint8_t precomp_table[15 * 2 * 32]);
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void x25519_ge_scalarmult_base(ge_p3 *h, const uint8_t a[32]);
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void x25519_ge_scalarmult(ge_p2 *r, const uint8_t *scalar, const ge_p3 *A);
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void x25519_sc_reduce(uint8_t s[64]);
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enum spake2_state_t {
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spake2_state_init = 0,
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spake2_state_msg_generated,
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spake2_state_key_generated,
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};
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struct spake2_ctx_st {
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uint8_t private_key[32];
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uint8_t my_msg[32];
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uint8_t password_scalar[32];
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uint8_t password_hash[64];
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uint8_t *my_name;
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size_t my_name_len;
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uint8_t *their_name;
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size_t their_name_len;
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enum spake2_role_t my_role;
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enum spake2_state_t state;
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char disable_password_scalar_hack;
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};
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_CURVE25519_INTERNAL_H
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