/*
* 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;
}
#if FF_API_CRYPTO_SIZE_T
void av_sha512_update(AVSHA512* ctx, const uint8_t* data, unsigned int len)
#else
void av_sha512_update(AVSHA512* ctx, const uint8_t* data, size_t len)
#endif
{
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);
}