Mercurial > dovecot > core-2.2
changeset 10749:9c188cfba679 HEAD
Added sha512_*() functions.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Thu, 18 Feb 2010 07:51:14 +0200 |
parents | a792d411e73e |
children | 6936dbe28947 |
files | src/lib/sha2.c src/lib/sha2.h |
diffstat | 2 files changed, 200 insertions(+), 3 deletions(-) [+] |
line wrap: on
line diff
--- a/src/lib/sha2.c Thu Feb 18 07:32:13 2010 +0200 +++ b/src/lib/sha2.c Thu Feb 18 07:51:14 2010 +0200 @@ -45,6 +45,11 @@ #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3)) #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10)) +#define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39)) +#define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41)) +#define SHA512_F3(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHFR(x, 7)) +#define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x, 6)) + #define UNPACK32(x, str) \ { \ *((str) + 3) = (uint8_t) ((x) ); \ @@ -85,20 +90,27 @@ | ((uint64_t) *((str) + 0) << 56); \ } -/* Macros used for loops unrolling */ - #define SHA256_SCR(i) \ { \ w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \ + SHA256_F3(w[i - 15]) + w[i - 16]; \ } - +#define SHA512_SCR(i) \ +{ \ + w[i] = SHA512_F4(w[i - 2]) + w[i - 7] \ + + SHA512_F3(w[i - 15]) + w[i - 16]; \ +} static const uint32_t sha256_h0[8] = {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19}; +static const uint64_t sha512_h0[8] = + {0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, + 0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL, + 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL, + 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL}; static const uint32_t sha256_k[64] = {0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, @@ -118,6 +130,48 @@ 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2}; +static const uint64_t sha512_k[80] = + {0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, + 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, + 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, + 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, + 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, + 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, + 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, + 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, + 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, + 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, + 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, + 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, + 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, + 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, + 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, + 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, + 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, + 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, + 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, + 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, + 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, + 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, + 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, + 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, + 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, + 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, + 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, + 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, + 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, + 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, + 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, + 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, + 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, + 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, + 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, + 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, + 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, + 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, + 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, + 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL}; + /* SHA-256 functions */ @@ -244,3 +298,128 @@ sha256_loop(&ctx, data, size); sha256_result(&ctx, digest); } + +/* SHA-512 functions */ + +static void sha512_transf(struct sha512_ctx *ctx, const unsigned char *data, + size_t block_nb) +{ + uint64_t w[80]; + uint64_t wv[8]; + uint64_t t1, t2; + const unsigned char *sub_block; + int i, j; + + for (i = 0; i < (int) block_nb; i++) { + sub_block = data + (i << 7); + + for (j = 0; j < 16; j++) { + PACK64(&sub_block[j << 3], &w[j]); + } + + for (j = 16; j < 80; j++) { + SHA512_SCR(j); + } + + for (j = 0; j < 8; j++) { + wv[j] = ctx->h[j]; + } + + for (j = 0; j < 80; j++) { + t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + + sha512_k[j] + w[j]; + t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]); + wv[7] = wv[6]; + wv[6] = wv[5]; + wv[5] = wv[4]; + wv[4] = wv[3] + t1; + wv[3] = wv[2]; + wv[2] = wv[1]; + wv[1] = wv[0]; + wv[0] = t1 + t2; + } + + for (j = 0; j < 8; j++) { + ctx->h[j] += wv[j]; + } + } +} + +void sha512_init(struct sha512_ctx *ctx) +{ + int i; + + for (i = 0; i < 8; i++) { + ctx->h[i] = sha512_h0[i]; + } + + ctx->len = 0; + ctx->tot_len = 0; +} + +void sha512_loop(struct sha512_ctx *ctx, const void *data, + size_t len) +{ + const unsigned char *shifted_message; + size_t block_nb; + size_t new_len, rem_len, tmp_len; + + tmp_len = SHA512_BLOCK_SIZE - ctx->len; + rem_len = len < tmp_len ? len : tmp_len; + + memcpy(&ctx->block[ctx->len], data, rem_len); + + if (ctx->len + len < SHA512_BLOCK_SIZE) { + ctx->len += len; + return; + } + + new_len = len - rem_len; + block_nb = new_len / SHA512_BLOCK_SIZE; + + shifted_message = CONST_PTR_OFFSET(data, rem_len); + + sha512_transf(ctx, ctx->block, 1); + sha512_transf(ctx, shifted_message, block_nb); + + rem_len = new_len % SHA512_BLOCK_SIZE; + memcpy(ctx->block, &shifted_message[block_nb << 7], rem_len); + + ctx->len = rem_len; + ctx->tot_len += (block_nb + 1) << 7; +} + +void sha512_result(struct sha512_ctx *ctx, + unsigned char digest[SHA512_RESULTLEN]) +{ + unsigned int block_nb; + unsigned int pm_len; + size_t len_b; + int i; + + block_nb = 1 + ((SHA512_BLOCK_SIZE - 17) + < (ctx->len % SHA512_BLOCK_SIZE)); + + len_b = (ctx->tot_len + ctx->len) << 3; + pm_len = block_nb << 7; + + memset(ctx->block + ctx->len, 0, pm_len - ctx->len); + ctx->block[ctx->len] = 0x80; + UNPACK32(len_b, ctx->block + pm_len - 4); + + sha512_transf(ctx, ctx->block, block_nb); + + for (i = 0 ; i < 8; i++) { + UNPACK64(ctx->h[i], &digest[i << 3]); + } +} + +void sha512_get_digest(const void *data, size_t size, + unsigned char digest[SHA512_RESULTLEN]) +{ + struct sha512_ctx ctx; + + sha512_init(&ctx); + sha512_loop(&ctx, data, size); + sha512_result(&ctx, digest); +}
--- a/src/lib/sha2.h Thu Feb 18 07:32:13 2010 +0200 +++ b/src/lib/sha2.h Thu Feb 18 07:51:14 2010 +0200 @@ -37,6 +37,9 @@ #define SHA256_RESULTLEN (256 / 8) #define SHA256_BLOCK_SIZE (512 / 8) +#define SHA512_RESULTLEN (512 / 8) +#define SHA512_BLOCK_SIZE (1024 / 8) + struct sha256_ctx { size_t tot_len; size_t len; @@ -44,6 +47,13 @@ uint32_t h[8]; }; +struct sha512_ctx { + size_t tot_len; + size_t len; + unsigned char block[2 * SHA512_BLOCK_SIZE]; + uint64_t h[8]; +}; + void sha256_init(struct sha256_ctx *ctx); void sha256_loop(struct sha256_ctx *ctx, const void *data, size_t len); void sha256_result(struct sha256_ctx *ctx, @@ -52,4 +62,12 @@ void sha256_get_digest(const void *data, size_t size, unsigned char digest[SHA256_RESULTLEN]); +void sha512_init(struct sha512_ctx *ctx); +void sha512_loop(struct sha512_ctx *ctx, const void *data, size_t len); +void sha512_result(struct sha512_ctx *ctx, + unsigned char digest[SHA512_RESULTLEN]); + +void sha512_get_digest(const void *data, size_t size, + unsigned char digest[SHA512_RESULTLEN]); + #endif /* !SHA2_H */