/* * 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 "config.h" #include "attributes.h" #include "bswap.h" #include "error.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, size_t len) { unsigned int j; size_t i; 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 (len >= 128 - j) { const uint8_t *end; memcpy(&ctx->buffer[j], data, (i = 128 - j)); sha512_transform(ctx->state, ctx->buffer); data += i; len -= i; end = data + (len & ~127); len = len % 128; for (; data < end; data += 128) sha512_transform(ctx->state, data); j = 0; } memcpy(&ctx->buffer[j], data, len); #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); }