From de54c2006f0ecb41684827408de42a08c70c885b Mon Sep 17 00:00:00 2001 From: Sebastian Rasmussen Date: Tue, 14 Aug 2012 19:16:33 +0200 Subject: Add SHA-384/-512 hash algorithms --- fitz/crypt_sha2.c | 203 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 203 insertions(+) (limited to 'fitz/crypt_sha2.c') diff --git a/fitz/crypt_sha2.c b/fitz/crypt_sha2.c index ba03b373..bedbb5e1 100644 --- a/fitz/crypt_sha2.c +++ b/fitz/crypt_sha2.c @@ -5,6 +5,8 @@ The code was modified a little to fit into liblzma and fitz. This file has been put into the public domain. You can do whatever you want with this file. + +SHA-384 and SHA-512 were also taken from Crypto++ and adapted for fitz. */ #include "fitz-internal.h" @@ -27,6 +29,22 @@ static inline unsigned int bswap32(unsigned int num) return num; } +static inline uint64_t bswap64(uint64_t num) +{ + if (!isbigendian()) + { + return ( (((num) << 56)) + | (((num) << 40) & 0x00FF000000000000ULL) + | (((num) << 24) & 0x0000FF0000000000ULL) + | (((num) << 8) & 0x000000FF00000000ULL) + | (((num) >> 8) & 0x00000000FF000000ULL) + | (((num) >> 24) & 0x0000000000FF0000ULL) + | (((num) >> 40) & 0x000000000000FF00ULL) + | (((num) >> 56)) ); + } + return num; +} + /* At least on x86, GCC is able to optimize this to a rotate instruction. */ #define rotr(num, amount) ((num) >> (amount) | (num) << (8 * sizeof(num) - (amount))) @@ -188,3 +206,188 @@ void fz_sha256_final(fz_sha256 *context, unsigned char digest[32]) ((unsigned int *)digest)[j] = bswap32(context->state[j]); memset(context, 0, sizeof(fz_sha256)); } + +/* For SHA512 */ + +#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) ^ (x >> 7)) +#define s1(x) (rotr(x, 19) ^ rotr(x, 61) ^ (x >> 6)) + +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, +}; + +static void +transform512(uint64_t state[8], const uint64_t data_xe[16]) +{ + const uint64_t *K = SHA512_K; + uint64_t data[16]; + uint64_t W[16]; + uint64_t T[8]; + unsigned int j; + + /* ensure big-endian integers */ + for (j = 0; j < 16; j++) + data[j] = bswap64(data_xe[j]); + + /* Copy state[] to working vars. */ + memcpy(T, state, sizeof(T)); + + /* 80 operations, partially loop unrolled */ + for (j = 0; j < 80; j+= 16) { + R( 0); R( 1); R( 2); R( 3); + R( 4); R( 5); R( 6); R( 7); + R( 8); R( 9); R(10); R(11); + R(12); R(13); R(14); R(15); + } + + /* Add the working vars back into state[]. */ + state[0] += a(0); + state[1] += b(0); + state[2] += c(0); + state[3] += d(0); + state[4] += e(0); + state[5] += f(0); + state[6] += g(0); + state[7] += h(0); +} + +#undef S0 +#undef S1 +#undef s0 +#undef s1 + +void fz_sha512_init(fz_sha512 *context) +{ + context->count[0] = context->count[1] = 0; + + context->state[0] = 0x6A09E667F3BCC908; + context->state[1] = 0xBB67AE8584CAA73B; + context->state[2] = 0x3C6EF372FE94F82B; + context->state[3] = 0xA54FF53A5F1D36F1; + context->state[4] = 0x510E527FADE682D1; + context->state[5] = 0x9B05688C2B3E6C1F; + context->state[6] = 0x1F83D9ABFB41BD6B; + context->state[7] = 0x5BE0CD19137E2179; +} + +void fz_sha512_update(fz_sha512 *context, const unsigned char *input, unsigned int inlen) +{ + /* Copy the input data into a properly aligned temporary buffer. + * This way we can be called with arbitrarily sized buffers + * (no need to be multiple of 128 bytes), and the code works also + * on architectures that don't allow unaligned memory access. */ + while (inlen > 0) + { + const unsigned int copy_start = context->count[0] & 0x7F; + unsigned int copy_size = 128 - copy_start; + if (copy_size > inlen) + copy_size = inlen; + + memcpy(context->buffer.u8 + copy_start, input, copy_size); + + input += copy_size; + inlen -= copy_size; + context->count[0] += copy_size; + /* carry overflow from low to high */ + if (context->count[0] < copy_size) + context->count[1]++; + + if ((context->count[0] & 0x7F) == 0) + transform512(context->state, context->buffer.u64); + } +} + +void fz_sha512_final(fz_sha512 *context, unsigned char digest[128]) +{ + /* Add padding as described in RFC 3174 (it describes SHA-1 but + * the same padding style is used for SHA-512 too). */ + unsigned int j = context->count[0] & 0x7F; + context->buffer.u8[j++] = 0x80; + + while (j != 120) + { + if (j == 128) + { + transform512(context->state, context->buffer.u64); + j = 0; + } + context->buffer.u8[j++] = 0x00; + } + + /* Convert the message size from bytes to bits. */ + context->count[1] = (context->count[1] << 3) + (context->count[0] >> 29); + context->count[0] = context->count[0] << 3; + + context->buffer.u64[14] = bswap64(context->count[1]); + context->buffer.u64[15] = bswap64(context->count[0]); + transform512(context->state, context->buffer.u64); + + for (j = 0; j < 16; j++) + ((uint64_t *)digest)[j] = bswap64(context->state[j]); + memset(context, 0, sizeof(fz_sha512)); +} + +void fz_sha384_init(fz_sha384 *context) +{ + context->count[0] = context->count[1] = 0; + + context->state[0] = 0xCBBB9D5DC1059ED8; + context->state[1] = 0x629A292A367CD507; + context->state[2] = 0x9159015A3070DD17; + context->state[3] = 0x152FECD8F70E5939; + context->state[4] = 0x67332667FFC00B31; + context->state[5] = 0x8EB44A8768581511; + context->state[6] = 0xDB0C2E0D64F98FA7; + context->state[7] = 0x47B5481DBEFA4FA4; +} + +void fz_sha384_update(fz_sha384 *context, const unsigned char *input, unsigned int inlen) +{ + fz_sha512_update(context, input, inlen); +} + +void fz_sha384_final(fz_sha384 *context, unsigned char digest[48]) +{ + fz_sha512_final(context, digest); +} -- cgit v1.2.3