LCOV - code coverage report
Current view: top level - src/libavutil - sha512.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 89 91 97.8 %
Date: 2017-01-24 04:42:20 Functions: 5 5 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
       3             :  * Copyright (C) 2009 Konstantin Shishkov
       4             :  * Copyright (C) 2013 James Almer
       5             :  * based on BSD-licensed SHA-2 code by Aaron D. Gifford
       6             :  *
       7             :  * This file is part of FFmpeg.
       8             :  *
       9             :  * FFmpeg is free software; you can redistribute it and/or
      10             :  * modify it under the terms of the GNU Lesser General Public
      11             :  * License as published by the Free Software Foundation; either
      12             :  * version 2.1 of the License, or (at your option) any later version.
      13             :  *
      14             :  * FFmpeg is distributed in the hope that it will be useful,
      15             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      17             :  * Lesser General Public License for more details.
      18             :  *
      19             :  * You should have received a copy of the GNU Lesser General Public
      20             :  * License along with FFmpeg; if not, write to the Free Software
      21             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      22             :  */
      23             : 
      24             : #include <string.h>
      25             : 
      26             : #include "attributes.h"
      27             : #include "avutil.h"
      28             : #include "bswap.h"
      29             : #include "sha512.h"
      30             : #include "intreadwrite.h"
      31             : #include "mem.h"
      32             : 
      33             : /** hash context */
      34             : typedef struct AVSHA512 {
      35             :     uint8_t  digest_len;  ///< digest length in 64-bit words
      36             :     uint64_t count;       ///< number of bytes in buffer
      37             :     uint8_t  buffer[128]; ///< 1024-bit buffer of input values used in hash updating
      38             :     uint64_t state[8];    ///< current hash value
      39             : } AVSHA512;
      40             : 
      41             : const int av_sha512_size = sizeof(AVSHA512);
      42             : 
      43           7 : struct AVSHA512 *av_sha512_alloc(void)
      44             : {
      45           7 :     return av_mallocz(sizeof(struct AVSHA512));
      46             : }
      47             : 
      48             : static const uint64_t K512[80] = {
      49             :     UINT64_C(0x428a2f98d728ae22),  UINT64_C(0x7137449123ef65cd),
      50             :     UINT64_C(0xb5c0fbcfec4d3b2f),  UINT64_C(0xe9b5dba58189dbbc),
      51             :     UINT64_C(0x3956c25bf348b538),  UINT64_C(0x59f111f1b605d019),
      52             :     UINT64_C(0x923f82a4af194f9b),  UINT64_C(0xab1c5ed5da6d8118),
      53             :     UINT64_C(0xd807aa98a3030242),  UINT64_C(0x12835b0145706fbe),
      54             :     UINT64_C(0x243185be4ee4b28c),  UINT64_C(0x550c7dc3d5ffb4e2),
      55             :     UINT64_C(0x72be5d74f27b896f),  UINT64_C(0x80deb1fe3b1696b1),
      56             :     UINT64_C(0x9bdc06a725c71235),  UINT64_C(0xc19bf174cf692694),
      57             :     UINT64_C(0xe49b69c19ef14ad2),  UINT64_C(0xefbe4786384f25e3),
      58             :     UINT64_C(0x0fc19dc68b8cd5b5),  UINT64_C(0x240ca1cc77ac9c65),
      59             :     UINT64_C(0x2de92c6f592b0275),  UINT64_C(0x4a7484aa6ea6e483),
      60             :     UINT64_C(0x5cb0a9dcbd41fbd4),  UINT64_C(0x76f988da831153b5),
      61             :     UINT64_C(0x983e5152ee66dfab),  UINT64_C(0xa831c66d2db43210),
      62             :     UINT64_C(0xb00327c898fb213f),  UINT64_C(0xbf597fc7beef0ee4),
      63             :     UINT64_C(0xc6e00bf33da88fc2),  UINT64_C(0xd5a79147930aa725),
      64             :     UINT64_C(0x06ca6351e003826f),  UINT64_C(0x142929670a0e6e70),
      65             :     UINT64_C(0x27b70a8546d22ffc),  UINT64_C(0x2e1b21385c26c926),
      66             :     UINT64_C(0x4d2c6dfc5ac42aed),  UINT64_C(0x53380d139d95b3df),
      67             :     UINT64_C(0x650a73548baf63de),  UINT64_C(0x766a0abb3c77b2a8),
      68             :     UINT64_C(0x81c2c92e47edaee6),  UINT64_C(0x92722c851482353b),
      69             :     UINT64_C(0xa2bfe8a14cf10364),  UINT64_C(0xa81a664bbc423001),
      70             :     UINT64_C(0xc24b8b70d0f89791),  UINT64_C(0xc76c51a30654be30),
      71             :     UINT64_C(0xd192e819d6ef5218),  UINT64_C(0xd69906245565a910),
      72             :     UINT64_C(0xf40e35855771202a),  UINT64_C(0x106aa07032bbd1b8),
      73             :     UINT64_C(0x19a4c116b8d2d0c8),  UINT64_C(0x1e376c085141ab53),
      74             :     UINT64_C(0x2748774cdf8eeb99),  UINT64_C(0x34b0bcb5e19b48a8),
      75             :     UINT64_C(0x391c0cb3c5c95a63),  UINT64_C(0x4ed8aa4ae3418acb),
      76             :     UINT64_C(0x5b9cca4f7763e373),  UINT64_C(0x682e6ff3d6b2b8a3),
      77             :     UINT64_C(0x748f82ee5defb2fc),  UINT64_C(0x78a5636f43172f60),
      78             :     UINT64_C(0x84c87814a1f0ab72),  UINT64_C(0x8cc702081a6439ec),
      79             :     UINT64_C(0x90befffa23631e28),  UINT64_C(0xa4506cebde82bde9),
      80             :     UINT64_C(0xbef9a3f7b2c67915),  UINT64_C(0xc67178f2e372532b),
      81             :     UINT64_C(0xca273eceea26619c),  UINT64_C(0xd186b8c721c0c207),
      82             :     UINT64_C(0xeada7dd6cde0eb1e),  UINT64_C(0xf57d4f7fee6ed178),
      83             :     UINT64_C(0x06f067aa72176fba),  UINT64_C(0x0a637dc5a2c898a6),
      84             :     UINT64_C(0x113f9804bef90dae),  UINT64_C(0x1b710b35131c471b),
      85             :     UINT64_C(0x28db77f523047d84),  UINT64_C(0x32caab7b40c72493),
      86             :     UINT64_C(0x3c9ebe0a15c9bebc),  UINT64_C(0x431d67c49c100d4c),
      87             :     UINT64_C(0x4cc5d4becb3e42b6),  UINT64_C(0x597f299cfc657e2a),
      88             :     UINT64_C(0x5fcb6fab3ad6faec),  UINT64_C(0x6c44198c4a475817),
      89             : };
      90             : 
      91             : #define ror(value, bits) (((value) >> (bits)) | ((value) << (64 - (bits))))
      92             : 
      93             : #define Ch(x,y,z)   (((x) & ((y) ^ (z))) ^ (z))
      94             : #define Maj(z,y,x)  ((((x) | (y)) & (z)) | ((x) & (y)))
      95             : 
      96             : #define Sigma0_512(x)   (ror((x), 28) ^ ror((x), 34) ^ ror((x), 39))
      97             : #define Sigma1_512(x)   (ror((x), 14) ^ ror((x), 18) ^ ror((x), 41))
      98             : #define sigma0_512(x)   (ror((x),  1) ^ ror((x),  8) ^ ((x) >> 7))
      99             : #define sigma1_512(x)   (ror((x), 19) ^ ror((x), 61) ^ ((x) >> 6))
     100             : 
     101             : #define blk0(i) (block[i] = AV_RB64(buffer + 8 * (i)))
     102             : #define blk(i)  (block[i] = block[i - 16] + sigma0_512(block[i - 15]) + \
     103             :                             sigma1_512(block[i - 2]) + block[i - 7])
     104             : 
     105             : #define ROUND512(a,b,c,d,e,f,g,h)   \
     106             :     T1 += (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[i]; \
     107             :     (d) += T1; \
     108             :     (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
     109             :     i++
     110             : 
     111             : #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h)   \
     112             :     T1 = blk0(i); \
     113             :     ROUND512(a,b,c,d,e,f,g,h)
     114             : 
     115             : #define ROUND512_16_TO_80(a,b,c,d,e,f,g,h)   \
     116             :     T1 = blk(i); \
     117             :     ROUND512(a,b,c,d,e,f,g,h)
     118             : 
     119       31326 : static void sha512_transform(uint64_t *state, const uint8_t buffer[128])
     120             : {
     121             :     uint64_t a, b, c, d, e, f, g, h;
     122             :     uint64_t block[80];
     123             :     uint64_t T1;
     124             :     int i;
     125             : 
     126       31326 :     a = state[0];
     127       31326 :     b = state[1];
     128       31326 :     c = state[2];
     129       31326 :     d = state[3];
     130       31326 :     e = state[4];
     131       31326 :     f = state[5];
     132       31326 :     g = state[6];
     133       31326 :     h = state[7];
     134             : #if CONFIG_SMALL
     135             :     for (i = 0; i < 80; i++) {
     136             :         uint64_t T2;
     137             :         if (i < 16)
     138             :             T1 = blk0(i);
     139             :         else
     140             :             T1 = blk(i);
     141             :         T1 += h + Sigma1_512(e) + Ch(e, f, g) + K512[i];
     142             :         T2 = Sigma0_512(a) + Maj(a, b, c);
     143             :         h = g;
     144             :         g = f;
     145             :         f = e;
     146             :         e = d + T1;
     147             :         d = c;
     148             :         c = b;
     149             :         b = a;
     150             :         a = T1 + T2;
     151             :     }
     152             : #else
     153             : 
     154             : #define R512_0 \
     155             :     ROUND512_0_TO_15(a, b, c, d, e, f, g, h); \
     156             :     ROUND512_0_TO_15(h, a, b, c, d, e, f, g); \
     157             :     ROUND512_0_TO_15(g, h, a, b, c, d, e, f); \
     158             :     ROUND512_0_TO_15(f, g, h, a, b, c, d, e); \
     159             :     ROUND512_0_TO_15(e, f, g, h, a, b, c, d); \
     160             :     ROUND512_0_TO_15(d, e, f, g, h, a, b, c); \
     161             :     ROUND512_0_TO_15(c, d, e, f, g, h, a, b); \
     162             :     ROUND512_0_TO_15(b, c, d, e, f, g, h, a)
     163             : 
     164       31326 :     i = 0;
     165       31326 :     R512_0; R512_0;
     166             : 
     167             : #define R512_16 \
     168             :     ROUND512_16_TO_80(a, b, c, d, e, f, g, h); \
     169             :     ROUND512_16_TO_80(h, a, b, c, d, e, f, g); \
     170             :     ROUND512_16_TO_80(g, h, a, b, c, d, e, f); \
     171             :     ROUND512_16_TO_80(f, g, h, a, b, c, d, e); \
     172             :     ROUND512_16_TO_80(e, f, g, h, a, b, c, d); \
     173             :     ROUND512_16_TO_80(d, e, f, g, h, a, b, c); \
     174             :     ROUND512_16_TO_80(c, d, e, f, g, h, a, b); \
     175             :     ROUND512_16_TO_80(b, c, d, e, f, g, h, a)
     176             : 
     177       31326 :     R512_16; R512_16; R512_16; R512_16;
     178       31326 :     R512_16; R512_16; R512_16; R512_16;
     179             : #endif
     180       31326 :     state[0] += a;
     181       31326 :     state[1] += b;
     182       31326 :     state[2] += c;
     183       31326 :     state[3] += d;
     184       31326 :     state[4] += e;
     185       31326 :     state[5] += f;
     186       31326 :     state[6] += g;
     187       31326 :     state[7] += h;
     188       31326 : }
     189             : 
     190             : 
     191          48 : av_cold int av_sha512_init(AVSHA512 *ctx, int bits)
     192             : {
     193          48 :     ctx->digest_len = bits >> 6;
     194          48 :     switch (bits) {
     195             :     case 224: // SHA-512/224
     196           6 :         ctx->state[0] = UINT64_C(0x8C3D37C819544DA2);
     197           6 :         ctx->state[1] = UINT64_C(0x73E1996689DCD4D6);
     198           6 :         ctx->state[2] = UINT64_C(0x1DFAB7AE32FF9C82);
     199           6 :         ctx->state[3] = UINT64_C(0x679DD514582F9FCF);
     200           6 :         ctx->state[4] = UINT64_C(0x0F6D2B697BD44DA8);
     201           6 :         ctx->state[5] = UINT64_C(0x77E36F7304C48942);
     202           6 :         ctx->state[6] = UINT64_C(0x3F9D85A86A1D36C8);
     203           6 :         ctx->state[7] = UINT64_C(0x1112E6AD91D692A1);
     204           6 :         break;
     205             :     case 256: // SHA-512/256
     206           6 :         ctx->state[0] = UINT64_C(0x22312194FC2BF72C);
     207           6 :         ctx->state[1] = UINT64_C(0x9F555FA3C84C64C2);
     208           6 :         ctx->state[2] = UINT64_C(0x2393B86B6F53B151);
     209           6 :         ctx->state[3] = UINT64_C(0x963877195940EABD);
     210           6 :         ctx->state[4] = UINT64_C(0x96283EE2A88EFFE3);
     211           6 :         ctx->state[5] = UINT64_C(0xBE5E1E2553863992);
     212           6 :         ctx->state[6] = UINT64_C(0x2B0199FC2C85B8AA);
     213           6 :         ctx->state[7] = UINT64_C(0x0EB72DDC81C52CA2);
     214           6 :         break;
     215             :     case 384: // SHA-384
     216          18 :         ctx->state[0] = UINT64_C(0xCBBB9D5DC1059ED8);
     217          18 :         ctx->state[1] = UINT64_C(0x629A292A367CD507);
     218          18 :         ctx->state[2] = UINT64_C(0x9159015A3070DD17);
     219          18 :         ctx->state[3] = UINT64_C(0x152FECD8F70E5939);
     220          18 :         ctx->state[4] = UINT64_C(0x67332667FFC00B31);
     221          18 :         ctx->state[5] = UINT64_C(0x8EB44A8768581511);
     222          18 :         ctx->state[6] = UINT64_C(0xDB0C2E0D64F98FA7);
     223          18 :         ctx->state[7] = UINT64_C(0x47B5481DBEFA4FA4);
     224          18 :         break;
     225             :     case 512: // SHA-512
     226          18 :         ctx->state[0] = UINT64_C(0x6A09E667F3BCC908);
     227          18 :         ctx->state[1] = UINT64_C(0xBB67AE8584CAA73B);
     228          18 :         ctx->state[2] = UINT64_C(0x3C6EF372FE94F82B);
     229          18 :         ctx->state[3] = UINT64_C(0xA54FF53A5F1D36F1);
     230          18 :         ctx->state[4] = UINT64_C(0x510E527FADE682D1);
     231          18 :         ctx->state[5] = UINT64_C(0x9B05688C2B3E6C1F);
     232          18 :         ctx->state[6] = UINT64_C(0x1F83D9ABFB41BD6B);
     233          18 :         ctx->state[7] = UINT64_C(0x5BE0CD19137E2179);
     234          18 :         break;
     235             :     default:
     236           0 :         return AVERROR(EINVAL);
     237             :     }
     238          48 :     ctx->count = 0;
     239          48 :     return 0;
     240             : }
     241             : 
     242     4003664 : void av_sha512_update(AVSHA512* ctx, const uint8_t* data, unsigned int len)
     243             : {
     244             :     unsigned int i, j;
     245             : 
     246     4003664 :     j = ctx->count & 127;
     247     4003664 :     ctx->count += len;
     248             : #if CONFIG_SMALL
     249             :     for (i = 0; i < len; i++) {
     250             :         ctx->buffer[j++] = data[i];
     251             :         if (128 == j) {
     252             :             sha512_transform(ctx->state, ctx->buffer);
     253             :             j = 0;
     254             :         }
     255             :     }
     256             : #else
     257     4003664 :     if ((j + len) > 127) {
     258       31326 :         memcpy(&ctx->buffer[j], data, (i = 128 - j));
     259       31326 :         sha512_transform(ctx->state, ctx->buffer);
     260       31326 :         for (; i + 127 < len; i += 128)
     261           0 :             sha512_transform(ctx->state, &data[i]);
     262       31326 :         j = 0;
     263             :     } else
     264     3972338 :         i = 0;
     265     4003664 :     memcpy(&ctx->buffer[j], &data[i], len - i);
     266             : #endif
     267     4003664 : }
     268             : 
     269          48 : void av_sha512_final(AVSHA512* ctx, uint8_t *digest)
     270             : {
     271          48 :     uint64_t i = 0;
     272          48 :     uint64_t finalcount = av_be2ne64(ctx->count << 3);
     273             : 
     274          48 :     av_sha512_update(ctx, "\200", 1);
     275        3552 :     while ((ctx->count & 127) != 112)
     276        3456 :         av_sha512_update(ctx, "", 1);
     277          48 :     av_sha512_update(ctx, (uint8_t *)&i, 8);
     278          48 :     av_sha512_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */
     279         342 :     for (i = 0; i < ctx->digest_len; i++)
     280         294 :         AV_WB64(digest + i*8, ctx->state[i]);
     281          48 :     if (ctx->digest_len & 1) /* SHA512/224 is 28 bytes, and is not divisible by 8. */
     282           6 :         AV_WB32(digest + i*8, ctx->state[i] >> 32);
     283          48 : }

Generated by: LCOV version 1.12