/* ==================================================================== * Copyright (c) 2008 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== */ #ifndef OPENSSL_HEADER_MODES_INTERNAL_H #define OPENSSL_HEADER_MODES_INTERNAL_H #include #include #include "../internal.h" #if defined(__cplusplus) extern "C" { #endif #define asm __asm__ #define STRICT_ALIGNMENT 1 #if defined(OPENSSL_X86_64) || defined(OPENSSL_X86) || defined(OPENSSL_AARCH64) #undef STRICT_ALIGNMENT #define STRICT_ALIGNMENT 0 #endif #if defined(__GNUC__) && __GNUC__ >= 2 static inline uint32_t CRYPTO_bswap4(uint32_t x) { return __builtin_bswap32(x); } static inline uint64_t CRYPTO_bswap8(uint64_t x) { return __builtin_bswap64(x); } #elif defined(_MSC_VER) OPENSSL_MSVC_PRAGMA(warning(push, 3)) #include OPENSSL_MSVC_PRAGMA(warning(pop)) #pragma intrinsic(_byteswap_uint64, _byteswap_ulong) static inline uint32_t CRYPTO_bswap4(uint32_t x) { return _byteswap_ulong(x); } static inline uint64_t CRYPTO_bswap8(uint64_t x) { return _byteswap_uint64(x); } #else static inline uint32_t CRYPTO_bswap4(uint32_t x) { x = (x >> 16) | (x << 16); x = ((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8); return x; } static inline uint64_t CRYPTO_bswap8(uint64_t x) { return CRYPTO_bswap4(x >> 32) | (((uint64_t)CRYPTO_bswap4(x)) << 32); } #endif static inline uint32_t GETU32(const void *in) { uint32_t v; OPENSSL_memcpy(&v, in, sizeof(v)); return CRYPTO_bswap4(v); } static inline void PUTU32(void *out, uint32_t v) { v = CRYPTO_bswap4(v); OPENSSL_memcpy(out, &v, sizeof(v)); } static inline uint32_t GETU32_aligned(const void *in) { const char *alias = (const char *) in; return CRYPTO_bswap4(*((const uint32_t *) alias)); } static inline void PUTU32_aligned(void *in, uint32_t v) { char *alias = (char *) in; *((uint32_t *) alias) = CRYPTO_bswap4(v); } /* block128_f is the type of a 128-bit, block cipher. */ typedef void (*block128_f)(const uint8_t in[16], uint8_t out[16], const void *key); /* GCM definitions */ typedef struct { uint64_t hi,lo; } u128; /* gmult_func multiplies |Xi| by the GCM key and writes the result back to * |Xi|. */ typedef void (*gmult_func)(uint64_t Xi[2], const u128 Htable[16]); /* ghash_func repeatedly multiplies |Xi| by the GCM key and adds in blocks from * |inp|. The result is written back to |Xi| and the |len| argument must be a * multiple of 16. */ typedef void (*ghash_func)(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp, size_t len); /* This differs from upstream's |gcm128_context| in that it does not have the * |key| pointer, in order to make it |memcpy|-friendly. Rather the key is * passed into each call that needs it. */ struct gcm128_context { /* Following 6 names follow names in GCM specification */ union { uint64_t u[2]; uint32_t d[4]; uint8_t c[16]; size_t t[16 / sizeof(size_t)]; } Yi, EKi, EK0, len, Xi; /* Note that the order of |Xi|, |H| and |Htable| is fixed by the MOVBE-based, * x86-64, GHASH assembly. */ u128 H; u128 Htable[16]; gmult_func gmult; ghash_func ghash; unsigned int mres, ares; block128_f block; }; #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) /* crypto_gcm_clmul_enabled returns one if the CLMUL implementation of GCM is * used. */ int crypto_gcm_clmul_enabled(void); #endif /* CTR. */ /* ctr128_f is the type of a function that performs CTR-mode encryption. */ typedef void (*ctr128_f)(const uint8_t *in, uint8_t *out, size_t blocks, const void *key, const uint8_t ivec[16]); /* CRYPTO_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode) * |len| bytes from |in| to |out| using |block| in counter mode. There's no * requirement that |len| be a multiple of any value and any partial blocks are * stored in |ecount_buf| and |*num|, which must be zeroed before the initial * call. The counter is a 128-bit, big-endian value in |ivec| and is * incremented by this function. */ void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], uint8_t ecount_buf[16], unsigned *num, block128_f block); /* CRYPTO_ctr128_encrypt_ctr32 acts like |CRYPTO_ctr128_encrypt| but takes * |ctr|, a function that performs CTR mode but only deals with the lower 32 * bits of the counter. This is useful when |ctr| can be an optimised * function. */ void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], uint8_t ecount_buf[16], unsigned *num, ctr128_f ctr); #if !defined(OPENSSL_NO_ASM) && \ (defined(OPENSSL_X86) || defined(OPENSSL_X86_64)) void aesni_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t blocks, const void *key, const uint8_t *ivec); #endif /* GCM. * * This API differs from the upstream API slightly. The |GCM128_CONTEXT| does * not have a |key| pointer that points to the key as upstream's version does. * Instead, every function takes a |key| parameter. This way |GCM128_CONTEXT| * can be safely copied. */ typedef struct gcm128_context GCM128_CONTEXT; /* CRYPTO_ghash_init writes a precomputed table of powers of |gcm_key| to * |out_table| and sets |*out_mult| and |*out_hash| to (potentially hardware * accelerated) functions for performing operations in the GHASH field. */ void CRYPTO_ghash_init(gmult_func *out_mult, ghash_func *out_hash, u128 *out_key, u128 out_table[16], const uint8_t *gcm_key); /* CRYPTO_gcm128_init initialises |ctx| to use |block| (typically AES) with * the given key. */ OPENSSL_EXPORT void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx, const void *key, block128_f block); /* CRYPTO_gcm128_setiv sets the IV (nonce) for |ctx|. The |key| must be the * same key that was passed to |CRYPTO_gcm128_init|. */ OPENSSL_EXPORT void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx, const void *key, const uint8_t *iv, size_t iv_len); /* CRYPTO_gcm128_aad sets the authenticated data for an instance of GCM. * This must be called before and data is encrypted. It returns one on success * and zero otherwise. */ OPENSSL_EXPORT int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx, const uint8_t *aad, size_t len); /* CRYPTO_gcm128_encrypt encrypts |len| bytes from |in| to |out|. The |key| * must be the same key that was passed to |CRYPTO_gcm128_init|. It returns one * on success and zero otherwise. */ OPENSSL_EXPORT int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx, const void *key, const uint8_t *in, uint8_t *out, size_t len); /* CRYPTO_gcm128_decrypt decrypts |len| bytes from |in| to |out|. The |key| * must be the same key that was passed to |CRYPTO_gcm128_init|. It returns one * on success and zero otherwise. */ OPENSSL_EXPORT int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx, const void *key, const uint8_t *in, uint8_t *out, size_t len); /* CRYPTO_gcm128_encrypt_ctr32 encrypts |len| bytes from |in| to |out| using * a CTR function that only handles the bottom 32 bits of the nonce, like * |CRYPTO_ctr128_encrypt_ctr32|. The |key| must be the same key that was * passed to |CRYPTO_gcm128_init|. It returns one on success and zero * otherwise. */ OPENSSL_EXPORT int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx, const void *key, const uint8_t *in, uint8_t *out, size_t len, ctr128_f stream); /* CRYPTO_gcm128_decrypt_ctr32 decrypts |len| bytes from |in| to |out| using * a CTR function that only handles the bottom 32 bits of the nonce, like * |CRYPTO_ctr128_encrypt_ctr32|. The |key| must be the same key that was * passed to |CRYPTO_gcm128_init|. It returns one on success and zero * otherwise. */ OPENSSL_EXPORT int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx, const void *key, const uint8_t *in, uint8_t *out, size_t len, ctr128_f stream); /* CRYPTO_gcm128_finish calculates the authenticator and compares it against * |len| bytes of |tag|. It returns one on success and zero otherwise. */ OPENSSL_EXPORT int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx, const uint8_t *tag, size_t len); /* CRYPTO_gcm128_tag calculates the authenticator and copies it into |tag|. * The minimum of |len| and 16 bytes are copied into |tag|. */ OPENSSL_EXPORT void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, uint8_t *tag, size_t len); /* CBC. */ /* cbc128_f is the type of a function that performs CBC-mode encryption. */ typedef void (*cbc128_f)(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], int enc); /* CRYPTO_cbc128_encrypt encrypts |len| bytes from |in| to |out| using the * given IV and block cipher in CBC mode. The input need not be a multiple of * 128 bits long, but the output will round up to the nearest 128 bit multiple, * zero padding the input if needed. The IV will be updated on return. */ void CRYPTO_cbc128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], block128_f block); /* CRYPTO_cbc128_decrypt decrypts |len| bytes from |in| to |out| using the * given IV and block cipher in CBC mode. If |len| is not a multiple of 128 * bits then only that many bytes will be written, but a multiple of 128 bits * is always read from |in|. The IV will be updated on return. */ void CRYPTO_cbc128_decrypt(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], block128_f block); /* OFB. */ /* CRYPTO_ofb128_encrypt encrypts (or decrypts, it's the same with OFB mode) * |len| bytes from |in| to |out| using |block| in OFB mode. There's no * requirement that |len| be a multiple of any value and any partial blocks are * stored in |ivec| and |*num|, the latter must be zero before the initial * call. */ void CRYPTO_ofb128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], unsigned *num, block128_f block); /* CFB. */ /* CRYPTO_cfb128_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes * from |in| to |out| using |block| in CFB mode. There's no requirement that * |len| be a multiple of any value and any partial blocks are stored in |ivec| * and |*num|, the latter must be zero before the initial call. */ void CRYPTO_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], unsigned *num, int enc, block128_f block); /* CRYPTO_cfb128_8_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes * from |in| to |out| using |block| in CFB-8 mode. Prior to the first call * |num| should be set to zero. */ void CRYPTO_cfb128_8_encrypt(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], unsigned *num, int enc, block128_f block); /* CRYPTO_cfb128_1_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes * from |in| to |out| using |block| in CFB-1 mode. Prior to the first call * |num| should be set to zero. */ void CRYPTO_cfb128_1_encrypt(const uint8_t *in, uint8_t *out, size_t bits, const void *key, uint8_t ivec[16], unsigned *num, int enc, block128_f block); size_t CRYPTO_cts128_encrypt_block(const uint8_t *in, uint8_t *out, size_t len, const void *key, uint8_t ivec[16], block128_f block); /* POLYVAL. * * POLYVAL is a polynomial authenticator that operates over a field very * similar to the one that GHASH uses. See * https://tools.ietf.org/html/draft-irtf-cfrg-gcmsiv-02#section-3. */ typedef union { uint64_t u[2]; uint8_t c[16]; } polyval_block; struct polyval_ctx { /* Note that the order of |S|, |H| and |Htable| is fixed by the MOVBE-based, * x86-64, GHASH assembly. */ polyval_block S; u128 H; u128 Htable[16]; gmult_func gmult; ghash_func ghash; }; /* CRYPTO_POLYVAL_init initialises |ctx| using |key|. */ void CRYPTO_POLYVAL_init(struct polyval_ctx *ctx, const uint8_t key[16]); /* CRYPTO_POLYVAL_update_blocks updates the accumulator in |ctx| given the * blocks from |in|. Only a whole number of blocks can be processed so |in_len| * must be a multiple of 16. */ void CRYPTO_POLYVAL_update_blocks(struct polyval_ctx *ctx, const uint8_t *in, size_t in_len); /* CRYPTO_POLYVAL_finish writes the accumulator from |ctx| to |out|. */ void CRYPTO_POLYVAL_finish(const struct polyval_ctx *ctx, uint8_t out[16]); #if defined(__cplusplus) } /* extern C */ #endif #endif /* OPENSSL_HEADER_MODES_INTERNAL_H */