diff options
author | Tor Andersson <tor.andersson@artifex.com> | 2013-06-19 15:29:44 +0200 |
---|---|---|
committer | Tor Andersson <tor.andersson@artifex.com> | 2013-06-20 16:45:35 +0200 |
commit | 0a927854a10e1e6b9770a81e2e1d9f3093631757 (patch) | |
tree | 3d65d820d9fdba2d0d394d99c36290c851b78ca0 /source/fitz/crypt-sha2.c | |
parent | 1ae8f19179c5f0f8c6352b3c7855465325d5449a (diff) | |
download | mupdf-0a927854a10e1e6b9770a81e2e1d9f3093631757.tar.xz |
Rearrange source files.
Diffstat (limited to 'source/fitz/crypt-sha2.c')
-rw-r--r-- | source/fitz/crypt-sha2.c | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/source/fitz/crypt-sha2.c b/source/fitz/crypt-sha2.c new file mode 100644 index 00000000..ffedfc95 --- /dev/null +++ b/source/fitz/crypt-sha2.c @@ -0,0 +1,393 @@ +/* +This code is based on the code found from 7-Zip, which has a modified +version of the SHA-256 found from Crypto++ <http://www.cryptopp.com/>. +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 "mupdf/fitz.h" + +static inline int isbigendian(void) +{ + static const int one = 1; + return *(char*)&one == 0; +} + +static inline unsigned int bswap32(unsigned int num) +{ + if (!isbigendian()) + { + return ( (((num) << 24)) + | (((num) << 8) & 0x00FF0000) + | (((num) >> 8) & 0x0000FF00) + | (((num) >> 24)) ); + } + 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))) + +#define blk0(i) (W[i] = data[i]) +#define blk2(i) (W[i & 15] += s1(W[(i - 2) & 15]) + W[(i - 7) & 15] \ + + s0(W[(i - 15) & 15])) + +#define Ch(x, y, z) (z ^ (x & (y ^ z))) +#define Maj(x, y, z) ((x & y) | (z & (x | y))) + +#define a(i) T[(0 - i) & 7] +#define b(i) T[(1 - i) & 7] +#define c(i) T[(2 - i) & 7] +#define d(i) T[(3 - i) & 7] +#define e(i) T[(4 - i) & 7] +#define f(i) T[(5 - i) & 7] +#define g(i) T[(6 - i) & 7] +#define h(i) T[(7 - i) & 7] + +#define R(i) \ + h(i) += S1(e(i)) + Ch(e(i), f(i), g(i)) + K[i + j] \ + + (j ? blk2(i) : blk0(i)); \ + d(i) += h(i); \ + h(i) += S0(a(i)) + Maj(a(i), b(i), c(i)) + +/* For SHA256 */ + +#define S0(x) (rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22)) +#define S1(x) (rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25)) +#define s0(x) (rotr(x, 7) ^ rotr(x, 18) ^ (x >> 3)) +#define s1(x) (rotr(x, 17) ^ rotr(x, 19) ^ (x >> 10)) + +static const unsigned int SHA256_K[64] = { + 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, + 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, + 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, + 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, + 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC, + 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, + 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, + 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967, + 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, + 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, + 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, + 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, + 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, + 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, + 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, + 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2, +}; + +static void +transform256(unsigned int state[8], const unsigned int data_xe[16]) +{ + const unsigned int *K = SHA256_K; + unsigned int data[16]; + unsigned int W[16]; + unsigned int T[8]; + unsigned int j; + + /* ensure big-endian integers */ + for (j = 0; j < 16; j++) + data[j] = bswap32(data_xe[j]); + + /* Copy state[] to working vars. */ + memcpy(T, state, sizeof(T)); + + /* 64 operations, partially loop unrolled */ + for (j = 0; j < 64; 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_sha256_init(fz_sha256 *context) +{ + context->count[0] = context->count[1] = 0; + + context->state[0] = 0x6A09E667; + context->state[1] = 0xBB67AE85; + context->state[2] = 0x3C6EF372; + context->state[3] = 0xA54FF53A; + context->state[4] = 0x510E527F; + context->state[5] = 0x9B05688C; + context->state[6] = 0x1F83D9AB; + context->state[7] = 0x5BE0CD19; +} + +void fz_sha256_update(fz_sha256 *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 64 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] & 0x3F; + unsigned int copy_size = 64 - 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] & 0x3F) == 0) + transform256(context->state, context->buffer.u32); + } +} + +void fz_sha256_final(fz_sha256 *context, unsigned char digest[32]) +{ + /* Add padding as described in RFC 3174 (it describes SHA-1 but + * the same padding style is used for SHA-256 too). */ + unsigned int j = context->count[0] & 0x3F; + context->buffer.u8[j++] = 0x80; + + while (j != 56) + { + if (j == 64) + { + transform256(context->state, context->buffer.u32); + 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.u32[14] = bswap32(context->count[1]); + context->buffer.u32[15] = bswap32(context->count[0]); + transform256(context->state, context->buffer.u32); + + for (j = 0; j < 8; j++) + ((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] = 0x6A09E667F3BCC908ull; + context->state[1] = 0xBB67AE8584CAA73Bull; + context->state[2] = 0x3C6EF372FE94F82Bull; + context->state[3] = 0xA54FF53A5F1D36F1ull; + context->state[4] = 0x510E527FADE682D1ull; + context->state[5] = 0x9B05688C2B3E6C1Full; + context->state[6] = 0x1F83D9ABFB41BD6Bull; + context->state[7] = 0x5BE0CD19137E2179ull; +} + +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[64]) +{ + /* 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 != 112) + { + 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 < 8; 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] = 0xCBBB9D5DC1059ED8ull; + context->state[1] = 0x629A292A367CD507ull; + context->state[2] = 0x9159015A3070DD17ull; + context->state[3] = 0x152FECD8F70E5939ull; + context->state[4] = 0x67332667FFC00B31ull; + context->state[5] = 0x8EB44A8768581511ull; + context->state[6] = 0xDB0C2E0D64F98FA7ull; + context->state[7] = 0x47B5481DBEFA4FA4ull; +} + +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[64]) +{ + fz_sha512_final(context, digest); +} |