/*- * Copyright 2005 Colin Percival * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS 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 AUTHOR OR 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include "sha512.h" #if BYTE_ORDER == BIG_ENDIAN /* Copy a vector of big-endian uint64_t into a vector of bytes */ #define be64enc_vect(dst, src, len) \ memcpy((void *)dst, (const void *)src, (size_t)len) /* Copy a vector of bytes into a vector of big-endian uint64_t */ #define be64dec_vect(dst, src, len) \ memcpy((void *)dst, (const void *)src, (size_t)len) #else /* BYTE_ORDER != BIG_ENDIAN */ /* * Encode a length len/4 vector of (uint64_t) into a length len vector of * (unsigned char) in big-endian form. Assumes len is a multiple of 8. */ static void be64enc_vect(unsigned char *dst, const uint64_t *src, size_t len) { size_t i; for (i = 0; i < len / 8; i++) be64enc(dst + i * 8, src[i]); } /* * Decode a big-endian length len vector of (unsigned char) into a length * len/4 vector of (uint64_t). Assumes len is a multiple of 8. */ static void be64dec_vect(uint64_t *dst, const unsigned char *src, size_t len) { size_t i; for (i = 0; i < len / 8; i++) dst[i] = be64dec(src + i * 8); } #endif /* BYTE_ORDER != BIG_ENDIAN */ /* Elementary functions used by SHA512 */ #define Ch(x, y, z) ((x & (y ^ z)) ^ z) #define Maj(x, y, z) ((x & (y | z)) | (y & z)) #define SHR(x, n) (x >> n) #define ROTR(x, n) ((x >> n) | (x << (64 - n))) #define S0(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39)) #define S1(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41)) #define s0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7)) #define s1(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHR(x, 6)) /* SHA512 round function */ #define RND(a, b, c, d, e, f, g, h, k) \ t0 = h + S1(e) + Ch(e, f, g) + k; \ t1 = S0(a) + Maj(a, b, c); \ d += t0; \ h = t0 + t1; /* Adjusted round function for rotating state */ #define RNDr(S, W, i, k) \ RND(S[(80 - i) % 8], S[(81 - i) % 8], \ S[(82 - i) % 8], S[(83 - i) % 8], \ S[(84 - i) % 8], S[(85 - i) % 8], \ S[(86 - i) % 8], S[(87 - i) % 8], \ W[i] + k) /* * SHA512 block compression function. The 512-bit state is transformed via * the 512-bit input block to produce a new state. */ static void SHA512_Transform(uint64_t * state, const unsigned char block[128]) { uint64_t W[80]; uint64_t S[8]; uint64_t t0, t1; int i; /* 1. Prepare message schedule W. */ be64dec_vect(W, block, 128); for (i = 16; i < 80; i++) W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16]; /* 2. Initialize working variables. */ memcpy(S, state, 64); /* 3. Mix. */ RNDr(S, W, 0, 0x428a2f98d728ae22ULL); RNDr(S, W, 1, 0x7137449123ef65cdULL); RNDr(S, W, 2, 0xb5c0fbcfec4d3b2fULL); RNDr(S, W, 3, 0xe9b5dba58189dbbcULL); RNDr(S, W, 4, 0x3956c25bf348b538ULL); RNDr(S, W, 5, 0x59f111f1b605d019ULL); RNDr(S, W, 6, 0x923f82a4af194f9bULL); RNDr(S, W, 7, 0xab1c5ed5da6d8118ULL); RNDr(S, W, 8, 0xd807aa98a3030242ULL); RNDr(S, W, 9, 0x12835b0145706fbeULL); RNDr(S, W, 10, 0x243185be4ee4b28cULL); RNDr(S, W, 11, 0x550c7dc3d5ffb4e2ULL); RNDr(S, W, 12, 0x72be5d74f27b896fULL); RNDr(S, W, 13, 0x80deb1fe3b1696b1ULL); RNDr(S, W, 14, 0x9bdc06a725c71235ULL); RNDr(S, W, 15, 0xc19bf174cf692694ULL); RNDr(S, W, 16, 0xe49b69c19ef14ad2ULL); RNDr(S, W, 17, 0xefbe4786384f25e3ULL); RNDr(S, W, 18, 0x0fc19dc68b8cd5b5ULL); RNDr(S, W, 19, 0x240ca1cc77ac9c65ULL); RNDr(S, W, 20, 0x2de92c6f592b0275ULL); RNDr(S, W, 21, 0x4a7484aa6ea6e483ULL); RNDr(S, W, 22, 0x5cb0a9dcbd41fbd4ULL); RNDr(S, W, 23, 0x76f988da831153b5ULL); RNDr(S, W, 24, 0x983e5152ee66dfabULL); RNDr(S, W, 25, 0xa831c66d2db43210ULL); RNDr(S, W, 26, 0xb00327c898fb213fULL); RNDr(S, W, 27, 0xbf597fc7beef0ee4ULL); RNDr(S, W, 28, 0xc6e00bf33da88fc2ULL); RNDr(S, W, 29, 0xd5a79147930aa725ULL); RNDr(S, W, 30, 0x06ca6351e003826fULL); RNDr(S, W, 31, 0x142929670a0e6e70ULL); RNDr(S, W, 32, 0x27b70a8546d22ffcULL); RNDr(S, W, 33, 0x2e1b21385c26c926ULL); RNDr(S, W, 34, 0x4d2c6dfc5ac42aedULL); RNDr(S, W, 35, 0x53380d139d95b3dfULL); RNDr(S, W, 36, 0x650a73548baf63deULL); RNDr(S, W, 37, 0x766a0abb3c77b2a8ULL); RNDr(S, W, 38, 0x81c2c92e47edaee6ULL); RNDr(S, W, 39, 0x92722c851482353bULL); RNDr(S, W, 40, 0xa2bfe8a14cf10364ULL); RNDr(S, W, 41, 0xa81a664bbc423001ULL); RNDr(S, W, 42, 0xc24b8b70d0f89791ULL); RNDr(S, W, 43, 0xc76c51a30654be30ULL); RNDr(S, W, 44, 0xd192e819d6ef5218ULL); RNDr(S, W, 45, 0xd69906245565a910ULL); RNDr(S, W, 46, 0xf40e35855771202aULL); RNDr(S, W, 47, 0x106aa07032bbd1b8ULL); RNDr(S, W, 48, 0x19a4c116b8d2d0c8ULL); RNDr(S, W, 49, 0x1e376c085141ab53ULL); RNDr(S, W, 50, 0x2748774cdf8eeb99ULL); RNDr(S, W, 51, 0x34b0bcb5e19b48a8ULL); RNDr(S, W, 52, 0x391c0cb3c5c95a63ULL); RNDr(S, W, 53, 0x4ed8aa4ae3418acbULL); RNDr(S, W, 54, 0x5b9cca4f7763e373ULL); RNDr(S, W, 55, 0x682e6ff3d6b2b8a3ULL); RNDr(S, W, 56, 0x748f82ee5defb2fcULL); RNDr(S, W, 57, 0x78a5636f43172f60ULL); RNDr(S, W, 58, 0x84c87814a1f0ab72ULL); RNDr(S, W, 59, 0x8cc702081a6439ecULL); RNDr(S, W, 60, 0x90befffa23631e28ULL); RNDr(S, W, 61, 0xa4506cebde82bde9ULL); RNDr(S, W, 62, 0xbef9a3f7b2c67915ULL); RNDr(S, W, 63, 0xc67178f2e372532bULL); RNDr(S, W, 64, 0xca273eceea26619cULL); RNDr(S, W, 65, 0xd186b8c721c0c207ULL); RNDr(S, W, 66, 0xeada7dd6cde0eb1eULL); RNDr(S, W, 67, 0xf57d4f7fee6ed178ULL); RNDr(S, W, 68, 0x06f067aa72176fbaULL); RNDr(S, W, 69, 0x0a637dc5a2c898a6ULL); RNDr(S, W, 70, 0x113f9804bef90daeULL); RNDr(S, W, 71, 0x1b710b35131c471bULL); RNDr(S, W, 72, 0x28db77f523047d84ULL); RNDr(S, W, 73, 0x32caab7b40c72493ULL); RNDr(S, W, 74, 0x3c9ebe0a15c9bebcULL); RNDr(S, W, 75, 0x431d67c49c100d4cULL); RNDr(S, W, 76, 0x4cc5d4becb3e42b6ULL); RNDr(S, W, 77, 0x597f299cfc657e2aULL); RNDr(S, W, 78, 0x5fcb6fab3ad6faecULL); RNDr(S, W, 79, 0x6c44198c4a475817ULL); /* 4. Mix local working variables into global state */ for (i = 0; i < 8; i++) state[i] += S[i]; } static unsigned char PAD[128] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* Add padding and terminating bit-count. */ static void SHA512_Pad(SHA512_CTX * ctx) { unsigned char len[16]; uint64_t r, plen; /* * Convert length to a vector of bytes -- we do this now rather * than later because the length will change after we pad. */ be64enc_vect(len, ctx->count, 16); /* Add 1--128 bytes so that the resulting length is 112 mod 128 */ r = (ctx->count[1] >> 3) & 0x7f; plen = (r < 112) ? (112 - r) : (240 - r); SHA512_Update(ctx, PAD, (size_t)plen); /* Add the terminating bit-count */ SHA512_Update(ctx, len, 16); } /* SHA-512 initialization. Begins a SHA-512 operation. */ void SHA512_Init(SHA512_CTX * ctx) { /* Zero bits processed so far */ ctx->count[0] = ctx->count[1] = 0; /* Magic initialization constants */ ctx->state[0] = 0x6a09e667f3bcc908ULL; ctx->state[1] = 0xbb67ae8584caa73bULL; ctx->state[2] = 0x3c6ef372fe94f82bULL; ctx->state[3] = 0xa54ff53a5f1d36f1ULL; ctx->state[4] = 0x510e527fade682d1ULL; ctx->state[5] = 0x9b05688c2b3e6c1fULL; ctx->state[6] = 0x1f83d9abfb41bd6bULL; ctx->state[7] = 0x5be0cd19137e2179ULL; } /* Add bytes into the hash */ void SHA512_Update(SHA512_CTX * ctx, const void *in, size_t len) { uint64_t bitlen[2]; uint64_t r; const unsigned char *src = in; /* Number of bytes left in the buffer from previous updates */ r = (ctx->count[1] >> 3) & 0x7f; /* Convert the length into a number of bits */ bitlen[1] = ((uint64_t)len) << 3; bitlen[0] = ((uint64_t)len) >> 61; /* Update number of bits */ if ((ctx->count[1] += bitlen[1]) < bitlen[1]) ctx->count[0]++; ctx->count[0] += bitlen[0]; /* Handle the case where we don't need to perform any transforms */ if (len < 128 - r) { memcpy(&ctx->buf[r], src, len); return; } /* Finish the current block */ memcpy(&ctx->buf[r], src, 128 - r); SHA512_Transform(ctx->state, ctx->buf); src += 128 - r; len -= 128 - r; /* Perform complete blocks */ while (len >= 128) { SHA512_Transform(ctx->state, src); src += 128; len -= 128; } /* Copy left over data into buffer */ memcpy(ctx->buf, src, len); } /* * SHA-512 finalization. Pads the input data, exports the hash value, * and clears the context state. */ void SHA512_Final(unsigned char digest[64], SHA512_CTX * ctx) { /* Add padding */ SHA512_Pad(ctx); /* Write the hash */ be64enc_vect(digest, ctx->state, 64); /* Clear the context state */ memset((void *)ctx, 0, sizeof(*ctx)); }