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Code Issues Releases Activity

fix CONFIG_SMALL case

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Originally committed as revision 7482 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-01-14 17:19:04 +00:00
parent 388b5e69ec
commit 95d1236bf5
1 changed files with 6 additions and 2 deletions
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8
libavutil/aes.c
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@ -52,7 +52,7 @@ static inline void addkey(uint64_t state[2], uint64_t round_key[2]){
#define SUBSHIFT2(s, box) t=s[0]; s[0]=box[s[ 8]]; s[ 8]=box[ t]; t=s[ 4]; s[ 4]=box[s[12]]; s[12]=box[t];
#define SUBSHIFT3(s, box) t=s[0]; s[0]=box[s[12]]; s[12]=box[s[ 8]]; s[ 8]=box[s[ 4]]; s[ 4]=box[t];
#define ROT(x,s) ((x>>s)|(x<<(32-s))
#define ROT(x,s) ((x<<s)|(x>>(32-s)))
static inline void mix(uint8_t state[4][4], uint32_t multbl[4][256]){
int i;
@ -97,7 +97,7 @@ void av_aes_encrypt(AVAES *a){
addkey(a->state, a->round_key[r]);
}
static init_multbl(uint8_t tbl[256], int c[4], uint8_t *log8, uint8_t *alog8){
static init_multbl(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8){
int i;
for(i=4; i<1024; i++)
tbl[i]= alog8[ log8[i/4] + log8[c[i&3]] ];
@ -132,13 +132,17 @@ AVAES *av_aes_init(uint8_t *key, int key_bits) {
// av_log(NULL, AV_LOG_ERROR, "%d, ", log8[i]);
}
init_multbl(dec_multbl[0], (int[4]){0xe, 0x9, 0xd, 0xb}, log8, alog8);
#ifndef CONFIG_SMALL
init_multbl(dec_multbl[1], (int[4]){0xb, 0xe, 0x9, 0xd}, log8, alog8);
init_multbl(dec_multbl[2], (int[4]){0xd, 0xb, 0xe, 0x9}, log8, alog8);
init_multbl(dec_multbl[3], (int[4]){0x9, 0xd, 0xb, 0xe}, log8, alog8);
#endif
init_multbl(enc_multbl[0], (int[4]){0x2, 0x1, 0x1, 0x3}, log8, alog8);
#ifndef CONFIG_SMALL
init_multbl(enc_multbl[1], (int[4]){0x3, 0x2, 0x1, 0x1}, log8, alog8);
init_multbl(enc_multbl[2], (int[4]){0x1, 0x3, 0x2, 0x1}, log8, alog8);
init_multbl(enc_multbl[3], (int[4]){0x1, 0x1, 0x3, 0x2}, log8, alog8);
#endif
}
if(key_bits!=128 && key_bits!=192 && key_bits!=256)