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-rw-r--r--ffmpeg/libavutil/aes.c341
1 files changed, 0 insertions, 341 deletions
diff --git a/ffmpeg/libavutil/aes.c b/ffmpeg/libavutil/aes.c
deleted file mode 100644
index a3eb295..0000000
--- a/ffmpeg/libavutil/aes.c
+++ /dev/null
@@ -1,341 +0,0 @@
-/*
- * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
- *
- * some optimization ideas from aes128.c by Reimar Doeffinger
- *
- * 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 "common.h"
-#include "aes.h"
-#include "intreadwrite.h"
-
-typedef union {
- uint64_t u64[2];
- uint32_t u32[4];
- uint8_t u8x4[4][4];
- uint8_t u8[16];
-} av_aes_block;
-
-typedef struct AVAES {
- // Note: round_key[16] is accessed in the init code, but this only
- // overwrites state, which does not matter (see also commit ba554c0).
- av_aes_block round_key[15];
- av_aes_block state[2];
- int rounds;
-} AVAES;
-
-const int av_aes_size= sizeof(AVAES);
-
-struct AVAES *av_aes_alloc(void)
-{
- return av_mallocz(sizeof(struct AVAES));
-}
-
-static const uint8_t rcon[10] = {
- 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36
-};
-
-static uint8_t sbox[256];
-static uint8_t inv_sbox[256];
-#if CONFIG_SMALL
-static uint32_t enc_multbl[1][256];
-static uint32_t dec_multbl[1][256];
-#else
-static uint32_t enc_multbl[4][256];
-static uint32_t dec_multbl[4][256];
-#endif
-
-#if HAVE_BIGENDIAN
-# define ROT(x, s) ((x >> s) | (x << (32-s)))
-#else
-# define ROT(x, s) ((x << s) | (x >> (32-s)))
-#endif
-
-static inline void addkey(av_aes_block *dst, const av_aes_block *src,
- const av_aes_block *round_key)
-{
- dst->u64[0] = src->u64[0] ^ round_key->u64[0];
- dst->u64[1] = src->u64[1] ^ round_key->u64[1];
-}
-
-static inline void addkey_s(av_aes_block *dst, const uint8_t *src,
- const av_aes_block *round_key)
-{
- dst->u64[0] = AV_RN64(src) ^ round_key->u64[0];
- dst->u64[1] = AV_RN64(src + 8) ^ round_key->u64[1];
-}
-
-static inline void addkey_d(uint8_t *dst, const av_aes_block *src,
- const av_aes_block *round_key)
-{
- AV_WN64(dst, src->u64[0] ^ round_key->u64[0]);
- AV_WN64(dst + 8, src->u64[1] ^ round_key->u64[1]);
-}
-
-static void subshift(av_aes_block s0[2], int s, const uint8_t *box)
-{
- av_aes_block *s1 = (av_aes_block *) (s0[0].u8 - s);
- av_aes_block *s3 = (av_aes_block *) (s0[0].u8 + s);
-
- s0[0].u8[ 0] = box[s0[1].u8[ 0]];
- s0[0].u8[ 4] = box[s0[1].u8[ 4]];
- s0[0].u8[ 8] = box[s0[1].u8[ 8]];
- s0[0].u8[12] = box[s0[1].u8[12]];
- s1[0].u8[ 3] = box[s1[1].u8[ 7]];
- s1[0].u8[ 7] = box[s1[1].u8[11]];
- s1[0].u8[11] = box[s1[1].u8[15]];
- s1[0].u8[15] = box[s1[1].u8[ 3]];
- s0[0].u8[ 2] = box[s0[1].u8[10]];
- s0[0].u8[10] = box[s0[1].u8[ 2]];
- s0[0].u8[ 6] = box[s0[1].u8[14]];
- s0[0].u8[14] = box[s0[1].u8[ 6]];
- s3[0].u8[ 1] = box[s3[1].u8[13]];
- s3[0].u8[13] = box[s3[1].u8[ 9]];
- s3[0].u8[ 9] = box[s3[1].u8[ 5]];
- s3[0].u8[ 5] = box[s3[1].u8[ 1]];
-}
-
-static inline int mix_core(uint32_t multbl[][256], int a, int b, int c, int d){
-#if CONFIG_SMALL
- return multbl[0][a] ^ ROT(multbl[0][b], 8) ^ ROT(multbl[0][c], 16) ^ ROT(multbl[0][d], 24);
-#else
- return multbl[0][a] ^ multbl[1][b] ^ multbl[2][c] ^ multbl[3][d];
-#endif
-}
-
-static inline void mix(av_aes_block state[2], uint32_t multbl[][256], int s1, int s3){
- uint8_t (*src)[4] = state[1].u8x4;
- state[0].u32[0] = mix_core(multbl, src[0][0], src[s1 ][1], src[2][2], src[s3 ][3]);
- state[0].u32[1] = mix_core(multbl, src[1][0], src[s3-1][1], src[3][2], src[s1-1][3]);
- state[0].u32[2] = mix_core(multbl, src[2][0], src[s3 ][1], src[0][2], src[s1 ][3]);
- state[0].u32[3] = mix_core(multbl, src[3][0], src[s1-1][1], src[1][2], src[s3-1][3]);
-}
-
-static inline void crypt(AVAES *a, int s, const uint8_t *sbox,
- uint32_t multbl[][256])
-{
- int r;
-
- for (r = a->rounds - 1; r > 0; r--) {
- mix(a->state, multbl, 3 - s, 1 + s);
- addkey(&a->state[1], &a->state[0], &a->round_key[r]);
- }
-
- subshift(&a->state[0], s, sbox);
-}
-
-void av_aes_crypt(AVAES *a, uint8_t *dst, const uint8_t *src,
- int count, uint8_t *iv, int decrypt)
-{
- while (count--) {
- addkey_s(&a->state[1], src, &a->round_key[a->rounds]);
- if (decrypt) {
- crypt(a, 0, inv_sbox, dec_multbl);
- if (iv) {
- addkey_s(&a->state[0], iv, &a->state[0]);
- memcpy(iv, src, 16);
- }
- addkey_d(dst, &a->state[0], &a->round_key[0]);
- } else {
- if (iv)
- addkey_s(&a->state[1], iv, &a->state[1]);
- crypt(a, 2, sbox, enc_multbl);
- addkey_d(dst, &a->state[0], &a->round_key[0]);
- if (iv)
- memcpy(iv, dst, 16);
- }
- src += 16;
- dst += 16;
- }
-}
-
-static void init_multbl2(uint32_t tbl[][256], const int c[4],
- const uint8_t *log8, const uint8_t *alog8,
- const uint8_t *sbox)
-{
- int i;
-
- for (i = 0; i < 256; i++) {
- int x = sbox[i];
- if (x) {
- int k, l, m, n;
- x = log8[x];
- k = alog8[x + log8[c[0]]];
- l = alog8[x + log8[c[1]]];
- m = alog8[x + log8[c[2]]];
- n = alog8[x + log8[c[3]]];
- tbl[0][i] = AV_NE(MKBETAG(k,l,m,n), MKTAG(k,l,m,n));
-#if !CONFIG_SMALL
- tbl[1][i] = ROT(tbl[0][i], 8);
- tbl[2][i] = ROT(tbl[0][i], 16);
- tbl[3][i] = ROT(tbl[0][i], 24);
-#endif
- }
- }
-}
-
-// this is based on the reference AES code by Paulo Barreto and Vincent Rijmen
-int av_aes_init(AVAES *a, const uint8_t *key, int key_bits, int decrypt)
-{
- int i, j, t, rconpointer = 0;
- uint8_t tk[8][4];
- int KC = key_bits >> 5;
- int rounds = KC + 6;
- uint8_t log8[256];
- uint8_t alog8[512];
-
- if (!enc_multbl[FF_ARRAY_ELEMS(enc_multbl)-1][FF_ARRAY_ELEMS(enc_multbl[0])-1]) {
- j = 1;
- for (i = 0; i < 255; i++) {
- alog8[i] = alog8[i + 255] = j;
- log8[j] = i;
- j ^= j + j;
- if (j > 255)
- j ^= 0x11B;
- }
- for (i = 0; i < 256; i++) {
- j = i ? alog8[255 - log8[i]] : 0;
- j ^= (j << 1) ^ (j << 2) ^ (j << 3) ^ (j << 4);
- j = (j ^ (j >> 8) ^ 99) & 255;
- inv_sbox[j] = i;
- sbox[i] = j;
- }
- init_multbl2(dec_multbl, (const int[4]) { 0xe, 0x9, 0xd, 0xb },
- log8, alog8, inv_sbox);
- init_multbl2(enc_multbl, (const int[4]) { 0x2, 0x1, 0x1, 0x3 },
- log8, alog8, sbox);
- }
-
- if (key_bits != 128 && key_bits != 192 && key_bits != 256)
- return -1;
-
- a->rounds = rounds;
-
- memcpy(tk, key, KC * 4);
- memcpy(a->round_key[0].u8, key, KC * 4);
-
- for (t = KC * 4; t < (rounds + 1) * 16; t += KC * 4) {
- for (i = 0; i < 4; i++)
- tk[0][i] ^= sbox[tk[KC - 1][(i + 1) & 3]];
- tk[0][0] ^= rcon[rconpointer++];
-
- for (j = 1; j < KC; j++) {
- if (KC != 8 || j != KC >> 1)
- for (i = 0; i < 4; i++)
- tk[j][i] ^= tk[j - 1][i];
- else
- for (i = 0; i < 4; i++)
- tk[j][i] ^= sbox[tk[j - 1][i]];
- }
-
- memcpy(a->round_key[0].u8 + t, tk, KC * 4);
- }
-
- if (decrypt) {
- for (i = 1; i < rounds; i++) {
- av_aes_block tmp[3];
- tmp[2] = a->round_key[i];
- subshift(&tmp[1], 0, sbox);
- mix(tmp, dec_multbl, 1, 3);
- a->round_key[i] = tmp[0];
- }
- } else {
- for (i = 0; i < (rounds + 1) >> 1; i++) {
- FFSWAP(av_aes_block, a->round_key[i], a->round_key[rounds-i]);
- }
- }
-
- return 0;
-}
-
-#ifdef TEST
-// LCOV_EXCL_START
-#include <string.h>
-#include "lfg.h"
-#include "log.h"
-
-int main(int argc, char **argv)
-{
- int i, j;
- AVAES b;
- uint8_t rkey[2][16] = {
- { 0 },
- { 0x10, 0xa5, 0x88, 0x69, 0xd7, 0x4b, 0xe5, 0xa3,
- 0x74, 0xcf, 0x86, 0x7c, 0xfb, 0x47, 0x38, 0x59 }
- };
- uint8_t pt[16], rpt[2][16]= {
- { 0x6a, 0x84, 0x86, 0x7c, 0xd7, 0x7e, 0x12, 0xad,
- 0x07, 0xea, 0x1b, 0xe8, 0x95, 0xc5, 0x3f, 0xa3 },
- { 0 }
- };
- uint8_t rct[2][16]= {
- { 0x73, 0x22, 0x81, 0xc0, 0xa0, 0xaa, 0xb8, 0xf7,
- 0xa5, 0x4a, 0x0c, 0x67, 0xa0, 0xc4, 0x5e, 0xcf },
- { 0x6d, 0x25, 0x1e, 0x69, 0x44, 0xb0, 0x51, 0xe0,
- 0x4e, 0xaa, 0x6f, 0xb4, 0xdb, 0xf7, 0x84, 0x65 }
- };
- uint8_t temp[16];
- int err = 0;
-
- av_log_set_level(AV_LOG_DEBUG);
-
- for (i = 0; i < 2; i++) {
- av_aes_init(&b, rkey[i], 128, 1);
- av_aes_crypt(&b, temp, rct[i], 1, NULL, 1);
- for (j = 0; j < 16; j++) {
- if (rpt[i][j] != temp[j]) {
- av_log(NULL, AV_LOG_ERROR, "%d %02X %02X\n",
- j, rpt[i][j], temp[j]);
- err = 1;
- }
- }
- }
-
- if (argc > 1 && !strcmp(argv[1], "-t")) {
- AVAES ae, ad;
- AVLFG prng;
-
- av_aes_init(&ae, "PI=3.141592654..", 128, 0);
- av_aes_init(&ad, "PI=3.141592654..", 128, 1);
- av_lfg_init(&prng, 1);
-
- for (i = 0; i < 10000; i++) {
- for (j = 0; j < 16; j++) {
- pt[j] = av_lfg_get(&prng);
- }
- {
- START_TIMER;
- av_aes_crypt(&ae, temp, pt, 1, NULL, 0);
- if (!(i & (i - 1)))
- av_log(NULL, AV_LOG_ERROR, "%02X %02X %02X %02X\n",
- temp[0], temp[5], temp[10], temp[15]);
- av_aes_crypt(&ad, temp, temp, 1, NULL, 1);
- STOP_TIMER("aes");
- }
- for (j = 0; j < 16; j++) {
- if (pt[j] != temp[j]) {
- av_log(NULL, AV_LOG_ERROR, "%d %d %02X %02X\n",
- i, j, pt[j], temp[j]);
- }
- }
- }
- }
- return err;
-}
-// LCOV_EXCL_STOP
-#endif
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