diff options
Diffstat (limited to 'libavutil/sha512.c')
-rw-r--r-- | libavutil/sha512.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/libavutil/sha512.c b/libavutil/sha512.c new file mode 100644 index 0000000000..2c5da25591 --- /dev/null +++ b/libavutil/sha512.c @@ -0,0 +1,283 @@ +/* + * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> + * Copyright (C) 2009 Konstantin Shishkov + * Copyright (C) 2013 James Almer + * based on BSD-licensed SHA-2 code by Aaron D. Gifford + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <string.h> + +#include "attributes.h" +#include "avutil.h" +#include "bswap.h" +#include "sha512.h" +#include "intreadwrite.h" +#include "mem.h" + +/** hash context */ +typedef struct AVSHA512 { + uint8_t digest_len; ///< digest length in 64-bit words + uint64_t count; ///< number of bytes in buffer + uint8_t buffer[128]; ///< 1024-bit buffer of input values used in hash updating + uint64_t state[8]; ///< current hash value +} AVSHA512; + +const int av_sha512_size = sizeof(AVSHA512); + +struct AVSHA512 *av_sha512_alloc(void) +{ + return av_mallocz(sizeof(struct AVSHA512)); +} + +static const uint64_t K512[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), +}; + +#define ror(value, bits) (((value) >> (bits)) | ((value) << (64 - (bits)))) + +#define Ch(x,y,z) (((x) & ((y) ^ (z))) ^ (z)) +#define Maj(z,y,x) ((((x) | (y)) & (z)) | ((x) & (y))) + +#define Sigma0_512(x) (ror((x), 28) ^ ror((x), 34) ^ ror((x), 39)) +#define Sigma1_512(x) (ror((x), 14) ^ ror((x), 18) ^ ror((x), 41)) +#define sigma0_512(x) (ror((x), 1) ^ ror((x), 8) ^ ((x) >> 7)) +#define sigma1_512(x) (ror((x), 19) ^ ror((x), 61) ^ ((x) >> 6)) + +#define blk0(i) (block[i] = AV_RB64(buffer + 8 * (i))) +#define blk(i) (block[i] = block[i - 16] + sigma0_512(block[i - 15]) + \ + sigma1_512(block[i - 2]) + block[i - 7]) + +#define ROUND512(a,b,c,d,e,f,g,h) \ + T1 += (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[i]; \ + (d) += T1; \ + (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \ + i++ + +#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \ + T1 = blk0(i); \ + ROUND512(a,b,c,d,e,f,g,h) + +#define ROUND512_16_TO_80(a,b,c,d,e,f,g,h) \ + T1 = blk(i); \ + ROUND512(a,b,c,d,e,f,g,h) + +static void sha512_transform(uint64_t *state, const uint8_t buffer[128]) +{ + uint64_t a, b, c, d, e, f, g, h; + uint64_t block[80]; + uint64_t T1; + int i; + + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + f = state[5]; + g = state[6]; + h = state[7]; +#if CONFIG_SMALL + for (i = 0; i < 80; i++) { + uint64_t T2; + if (i < 16) + T1 = blk0(i); + else + T1 = blk(i); + T1 += h + Sigma1_512(e) + Ch(e, f, g) + K512[i]; + T2 = Sigma0_512(a) + Maj(a, b, c); + h = g; + g = f; + f = e; + e = d + T1; + d = c; + c = b; + b = a; + a = T1 + T2; + } +#else + +#define R512_0 \ + ROUND512_0_TO_15(a, b, c, d, e, f, g, h); \ + ROUND512_0_TO_15(h, a, b, c, d, e, f, g); \ + ROUND512_0_TO_15(g, h, a, b, c, d, e, f); \ + ROUND512_0_TO_15(f, g, h, a, b, c, d, e); \ + ROUND512_0_TO_15(e, f, g, h, a, b, c, d); \ + ROUND512_0_TO_15(d, e, f, g, h, a, b, c); \ + ROUND512_0_TO_15(c, d, e, f, g, h, a, b); \ + ROUND512_0_TO_15(b, c, d, e, f, g, h, a) + + i = 0; + R512_0; R512_0; + +#define R512_16 \ + ROUND512_16_TO_80(a, b, c, d, e, f, g, h); \ + ROUND512_16_TO_80(h, a, b, c, d, e, f, g); \ + ROUND512_16_TO_80(g, h, a, b, c, d, e, f); \ + ROUND512_16_TO_80(f, g, h, a, b, c, d, e); \ + ROUND512_16_TO_80(e, f, g, h, a, b, c, d); \ + ROUND512_16_TO_80(d, e, f, g, h, a, b, c); \ + ROUND512_16_TO_80(c, d, e, f, g, h, a, b); \ + ROUND512_16_TO_80(b, c, d, e, f, g, h, a) + + R512_16; R512_16; R512_16; R512_16; + R512_16; R512_16; R512_16; R512_16; +#endif + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + state[5] += f; + state[6] += g; + state[7] += h; +} + + +av_cold int av_sha512_init(AVSHA512 *ctx, int bits) +{ + ctx->digest_len = bits >> 6; + switch (bits) { + case 224: // SHA-512/224 + ctx->state[0] = UINT64_C(0x8C3D37C819544DA2); + ctx->state[1] = UINT64_C(0x73E1996689DCD4D6); + ctx->state[2] = UINT64_C(0x1DFAB7AE32FF9C82); + ctx->state[3] = UINT64_C(0x679DD514582F9FCF); + ctx->state[4] = UINT64_C(0x0F6D2B697BD44DA8); + ctx->state[5] = UINT64_C(0x77E36F7304C48942); + ctx->state[6] = UINT64_C(0x3F9D85A86A1D36C8); + ctx->state[7] = UINT64_C(0x1112E6AD91D692A1); + break; + case 256: // SHA-512/256 + ctx->state[0] = UINT64_C(0x22312194FC2BF72C); + ctx->state[1] = UINT64_C(0x9F555FA3C84C64C2); + ctx->state[2] = UINT64_C(0x2393B86B6F53B151); + ctx->state[3] = UINT64_C(0x963877195940EABD); + ctx->state[4] = UINT64_C(0x96283EE2A88EFFE3); + ctx->state[5] = UINT64_C(0xBE5E1E2553863992); + ctx->state[6] = UINT64_C(0x2B0199FC2C85B8AA); + ctx->state[7] = UINT64_C(0x0EB72DDC81C52CA2); + break; + case 384: // SHA-384 + ctx->state[0] = UINT64_C(0xCBBB9D5DC1059ED8); + ctx->state[1] = UINT64_C(0x629A292A367CD507); + ctx->state[2] = UINT64_C(0x9159015A3070DD17); + ctx->state[3] = UINT64_C(0x152FECD8F70E5939); + ctx->state[4] = UINT64_C(0x67332667FFC00B31); + ctx->state[5] = UINT64_C(0x8EB44A8768581511); + ctx->state[6] = UINT64_C(0xDB0C2E0D64F98FA7); + ctx->state[7] = UINT64_C(0x47B5481DBEFA4FA4); + break; + case 512: // SHA-512 + ctx->state[0] = UINT64_C(0x6A09E667F3BCC908); + ctx->state[1] = UINT64_C(0xBB67AE8584CAA73B); + ctx->state[2] = UINT64_C(0x3C6EF372FE94F82B); + ctx->state[3] = UINT64_C(0xA54FF53A5F1D36F1); + ctx->state[4] = UINT64_C(0x510E527FADE682D1); + ctx->state[5] = UINT64_C(0x9B05688C2B3E6C1F); + ctx->state[6] = UINT64_C(0x1F83D9ABFB41BD6B); + ctx->state[7] = UINT64_C(0x5BE0CD19137E2179); + break; + default: + return AVERROR(EINVAL); + } + ctx->count = 0; + return 0; +} + +void av_sha512_update(AVSHA512* ctx, const uint8_t* data, unsigned int len) +{ + unsigned int i, j; + + j = ctx->count & 127; + ctx->count += len; +#if CONFIG_SMALL + for (i = 0; i < len; i++) { + ctx->buffer[j++] = data[i]; + if (128 == j) { + sha512_transform(ctx->state, ctx->buffer); + j = 0; + } + } +#else + if ((j + len) > 127) { + memcpy(&ctx->buffer[j], data, (i = 128 - j)); + sha512_transform(ctx->state, ctx->buffer); + for (; i + 127 < len; i += 128) + sha512_transform(ctx->state, &data[i]); + j = 0; + } else + i = 0; + memcpy(&ctx->buffer[j], &data[i], len - i); +#endif +} + +void av_sha512_final(AVSHA512* ctx, uint8_t *digest) +{ + uint64_t i = 0; + uint64_t finalcount = av_be2ne64(ctx->count << 3); + + av_sha512_update(ctx, "\200", 1); + while ((ctx->count & 127) != 112) + av_sha512_update(ctx, "", 1); + av_sha512_update(ctx, (uint8_t *)&i, 8); + av_sha512_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */ + for (i = 0; i < ctx->digest_len; i++) + AV_WB64(digest + i*8, ctx->state[i]); + if (ctx->digest_len & 1) /* SHA512/224 is 28 bytes, and is not divisible by 8. */ + AV_WB32(digest + i*8, ctx->state[i] >> 32); +} |