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Diffstat (limited to 'src/sha512.c')
| -rw-r--r-- | src/sha512.c | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/src/sha512.c b/src/sha512.c new file mode 100644 index 0000000..62c7159 --- /dev/null +++ b/src/sha512.c @@ -0,0 +1,315 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + * + * Tom St Denis, tomstdenis@gmail.com, http://libtom.org + */ + +#include "fixedint.h" + +#include "common.h" +#include "libimobiledevice-glue/sha.h" + +/* the K array */ +static const uint64_t K[80] = { + UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd), + UINT64_C(0xb5c0fbcfec4d3b2f), UINT64_C(0xe9b5dba58189dbbc), + UINT64_C(0x3956c25bf348b538), UINT64_C(0x59f111f1b605d019), + UINT64_C(0x923f82a4af194f9b), UINT64_C(0xab1c5ed5da6d8118), + UINT64_C(0xd807aa98a3030242), UINT64_C(0x12835b0145706fbe), + UINT64_C(0x243185be4ee4b28c), UINT64_C(0x550c7dc3d5ffb4e2), + UINT64_C(0x72be5d74f27b896f), UINT64_C(0x80deb1fe3b1696b1), + UINT64_C(0x9bdc06a725c71235), UINT64_C(0xc19bf174cf692694), + UINT64_C(0xe49b69c19ef14ad2), UINT64_C(0xefbe4786384f25e3), + UINT64_C(0x0fc19dc68b8cd5b5), UINT64_C(0x240ca1cc77ac9c65), + UINT64_C(0x2de92c6f592b0275), UINT64_C(0x4a7484aa6ea6e483), + UINT64_C(0x5cb0a9dcbd41fbd4), UINT64_C(0x76f988da831153b5), + UINT64_C(0x983e5152ee66dfab), UINT64_C(0xa831c66d2db43210), + UINT64_C(0xb00327c898fb213f), UINT64_C(0xbf597fc7beef0ee4), + UINT64_C(0xc6e00bf33da88fc2), UINT64_C(0xd5a79147930aa725), + UINT64_C(0x06ca6351e003826f), UINT64_C(0x142929670a0e6e70), + UINT64_C(0x27b70a8546d22ffc), UINT64_C(0x2e1b21385c26c926), + UINT64_C(0x4d2c6dfc5ac42aed), UINT64_C(0x53380d139d95b3df), + UINT64_C(0x650a73548baf63de), UINT64_C(0x766a0abb3c77b2a8), + UINT64_C(0x81c2c92e47edaee6), UINT64_C(0x92722c851482353b), + UINT64_C(0xa2bfe8a14cf10364), UINT64_C(0xa81a664bbc423001), + UINT64_C(0xc24b8b70d0f89791), UINT64_C(0xc76c51a30654be30), + UINT64_C(0xd192e819d6ef5218), UINT64_C(0xd69906245565a910), + UINT64_C(0xf40e35855771202a), UINT64_C(0x106aa07032bbd1b8), + UINT64_C(0x19a4c116b8d2d0c8), UINT64_C(0x1e376c085141ab53), + UINT64_C(0x2748774cdf8eeb99), UINT64_C(0x34b0bcb5e19b48a8), + UINT64_C(0x391c0cb3c5c95a63), UINT64_C(0x4ed8aa4ae3418acb), + UINT64_C(0x5b9cca4f7763e373), UINT64_C(0x682e6ff3d6b2b8a3), + UINT64_C(0x748f82ee5defb2fc), UINT64_C(0x78a5636f43172f60), + UINT64_C(0x84c87814a1f0ab72), UINT64_C(0x8cc702081a6439ec), + UINT64_C(0x90befffa23631e28), UINT64_C(0xa4506cebde82bde9), + UINT64_C(0xbef9a3f7b2c67915), UINT64_C(0xc67178f2e372532b), + UINT64_C(0xca273eceea26619c), UINT64_C(0xd186b8c721c0c207), + UINT64_C(0xeada7dd6cde0eb1e), UINT64_C(0xf57d4f7fee6ed178), + UINT64_C(0x06f067aa72176fba), UINT64_C(0x0a637dc5a2c898a6), + UINT64_C(0x113f9804bef90dae), UINT64_C(0x1b710b35131c471b), + UINT64_C(0x28db77f523047d84), UINT64_C(0x32caab7b40c72493), + UINT64_C(0x3c9ebe0a15c9bebc), UINT64_C(0x431d67c49c100d4c), + UINT64_C(0x4cc5d4becb3e42b6), UINT64_C(0x597f299cfc657e2a), + UINT64_C(0x5fcb6fab3ad6faec), UINT64_C(0x6c44198c4a475817) +}; + +/* Various logical functions */ + +#define ROR64c(x, y) \ + ( ((((x)&UINT64_C(0xFFFFFFFFFFFFFFFF))>>((uint64_t)(y)&UINT64_C(63))) | \ + ((x)<<((uint64_t)(64-((y)&UINT64_C(63)))))) & UINT64_C(0xFFFFFFFFFFFFFFFF)) + +#define STORE64H(x, y) \ + { (y)[0] = (unsigned char)(((x)>>56)&255); (y)[1] = (unsigned char)(((x)>>48)&255); \ + (y)[2] = (unsigned char)(((x)>>40)&255); (y)[3] = (unsigned char)(((x)>>32)&255); \ + (y)[4] = (unsigned char)(((x)>>24)&255); (y)[5] = (unsigned char)(((x)>>16)&255); \ + (y)[6] = (unsigned char)(((x)>>8)&255); (y)[7] = (unsigned char)((x)&255); } + +#define LOAD64H(x, y) \ + { x = (((uint64_t)((y)[0] & 255))<<56)|(((uint64_t)((y)[1] & 255))<<48) | \ + (((uint64_t)((y)[2] & 255))<<40)|(((uint64_t)((y)[3] & 255))<<32) | \ + (((uint64_t)((y)[4] & 255))<<24)|(((uint64_t)((y)[5] & 255))<<16) | \ + (((uint64_t)((y)[6] & 255))<<8)|(((uint64_t)((y)[7] & 255))); } + + +#define Ch(x,y,z) (z ^ (x & (y ^ z))) +#define Maj(x,y,z) (((x | y) & z) | (x & y)) +#define S(x, n) ROR64c(x, n) +#define R(x, n) (((x) &UINT64_C(0xFFFFFFFFFFFFFFFF))>>((uint64_t)n)) +#define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39)) +#define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41)) +#define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7)) +#define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6)) +#ifndef MIN + #define MIN(x, y) ( ((x)<(y))?(x):(y) ) +#endif + +/* compress 1024-bits */ +static int sha512_compress(sha512_context *md, unsigned char *buf) +{ + uint64_t S[8], W[80], t0, t1; + int i; + + /* copy state into S */ + for (i = 0; i < 8; i++) { + S[i] = md->state[i]; + } + + /* copy the state into 1024-bits into W[0..15] */ + for (i = 0; i < 16; i++) { + LOAD64H(W[i], buf + (8*i)); + } + + /* fill W[16..79] */ + for (i = 16; i < 80; i++) { + W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16]; + } + + /* Compress */ + #define RND(a,b,c,d,e,f,g,h,i) \ + t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \ + t1 = Sigma0(a) + Maj(a, b, c);\ + d += t0; \ + h = t0 + t1; + + for (i = 0; i < 80; i += 8) { + RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0); + RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1); + RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2); + RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3); + RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4); + RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5); + RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6); + RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7); + } + + #undef RND + + /* feedback */ + for (i = 0; i < 8; i++) { + md->state[i] = md->state[i] + S[i]; + } + + return 0; +} + + +/** + Initialize the hash state + @param md The hash state you wish to initialize + @return 0 if successful +*/ +int sha512_init(sha512_context * md) { + if (md == NULL) return 1; + + md->curlen = 0; + md->length = 0; + md->state[0] = UINT64_C(0x6a09e667f3bcc908); + md->state[1] = UINT64_C(0xbb67ae8584caa73b); + md->state[2] = UINT64_C(0x3c6ef372fe94f82b); + md->state[3] = UINT64_C(0xa54ff53a5f1d36f1); + md->state[4] = UINT64_C(0x510e527fade682d1); + md->state[5] = UINT64_C(0x9b05688c2b3e6c1f); + md->state[6] = UINT64_C(0x1f83d9abfb41bd6b); + md->state[7] = UINT64_C(0x5be0cd19137e2179); + md->num_qwords = 8; + + return 0; +} + +/** + Process a block of memory though the hash + @param md The hash state + @param data The data to hash + @param inlen The length of the data (octets) + @return 0 if successful +*/ +int sha512_update (sha512_context * md, const void *data, size_t inlen) +{ + const unsigned char* in = (const unsigned char*)data; + size_t n; + size_t i; + int err; + if (md == NULL) return 1; + if (in == NULL) return 1; + if (md->curlen > sizeof(md->buf)) { + return 1; + } + while (inlen > 0) { + if (md->curlen == 0 && inlen >= 128) { + if ((err = sha512_compress (md, (unsigned char *)in)) != 0) { + return err; + } + md->length += 128 * 8; + in += 128; + inlen -= 128; + } else { + n = MIN(inlen, (128 - md->curlen)); + + for (i = 0; i < n; i++) { + md->buf[i + md->curlen] = in[i]; + } + + + md->curlen += n; + in += n; + inlen -= n; + if (md->curlen == 128) { + if ((err = sha512_compress (md, md->buf)) != 0) { + return err; + } + md->length += 8*128; + md->curlen = 0; + } + } + } + return 0; +} + +/** + Terminate the hash to get the digest + @param md The hash state + @param out [out] The destination of the hash (64 bytes) + @return 0 if successful +*/ +int sha512_final(sha512_context * md, unsigned char *out) +{ + int i; + + if (md == NULL) return 1; + if (out == NULL) return 1; + + if (md->curlen >= sizeof(md->buf)) { + return 1; + } + + /* increase the length of the message */ + md->length += md->curlen * UINT64_C(8); + + /* append the '1' bit */ + md->buf[md->curlen++] = (unsigned char)0x80; + + /* if the length is currently above 112 bytes we append zeros + * then compress. Then we can fall back to padding zeros and length + * encoding like normal. + */ + if (md->curlen > 112) { + while (md->curlen < 128) { + md->buf[md->curlen++] = (unsigned char)0; + } + sha512_compress(md, md->buf); + md->curlen = 0; + } + + /* pad upto 120 bytes of zeroes + * note: that from 112 to 120 is the 64 MSB of the length. We assume that you won't hash + * > 2^64 bits of data... :-) + */ + while (md->curlen < 120) { + md->buf[md->curlen++] = (unsigned char)0; + } + + /* store length */ + STORE64H(md->length, md->buf+120); + sha512_compress(md, md->buf); + + /* copy output */ + for (i = 0; i < md->num_qwords; i++) { + STORE64H(md->state[i], out+(8*i)); + } + + return 0; +} + +int sha512(const unsigned char *message, size_t message_len, unsigned char *out) +{ + sha512_context ctx; + int ret; + if ((ret = sha512_init(&ctx))) return ret; + if ((ret = sha512_update(&ctx, message, message_len))) return ret; + if ((ret = sha512_final(&ctx, out))) return ret; + return 0; +} + +int sha384_init(sha384_context * md) { + if (md == NULL) return 1; + + md->curlen = 0; + md->length = 0; + md->state[0] = UINT64_C(0xcbbb9d5dc1059ed8); + md->state[1] = UINT64_C(0x629a292a367cd507); + md->state[2] = UINT64_C(0x9159015a3070dd17); + md->state[3] = UINT64_C(0x152fecd8f70e5939); + md->state[4] = UINT64_C(0x67332667ffc00b31); + md->state[5] = UINT64_C(0x8eb44a8768581511); + md->state[6] = UINT64_C(0xdb0c2e0d64f98fa7); + md->state[7] = UINT64_C(0x47b5481dbefa4fa4); + md->num_qwords = 6; + + return 0; +} + +int sha384_update(sha384_context * md, const void *data, size_t inlen) +{ + return sha512_update(md, data, inlen); +} + +int sha384_final(sha384_context * md, unsigned char* out) +{ + return sha512_final(md, out); +} + +int sha384(const unsigned char *message, size_t message_len, unsigned char *out) +{ + sha384_context ctx; + int ret; + if ((ret = sha384_init(&ctx))) return ret; + if ((ret = sha384_update(&ctx, message, message_len))) return ret; + if ((ret = sha384_final(&ctx, out))) return ret; + return 0; +} |