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give crypt a src and dst

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same speed, 100bytes larger object file

Originally committed as revision 7548 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-01-16 17:51:54 +00:00
parent b18e5c031c
commit 7465619af8
1 changed files with 21 additions and 23 deletions
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44
libavutil/aes.c
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@ -45,9 +45,9 @@ static uint32_t enc_multbl[4][256];
static uint32_t dec_multbl[4][256];
#endif
static inline void addkey(uint64_t state[2], uint64_t round_key[2]){
state[2] = state[0] ^ round_key[0];
state[3] = state[1] ^ round_key[1];
static inline void addkey(uint64_t dst[2], uint64_t src[2], uint64_t round_key[2]){
dst[0] = src[0] ^ round_key[0];
dst[1] = src[1] ^ round_key[1];
}
static void subshift(uint8_t s0[2][16], int s, uint8_t *box){
@ -85,24 +85,24 @@ static inline void mix(uint8_t state[2][4][4], uint32_t multbl[4][256], int s1,
^multbl[2][state[1][1][2]] ^ multbl[3][state[1][s3-1][3]];
}
static inline void crypt(AVAES *a, int s, uint8_t *sbox, uint32_t *multbl){
static inline void crypt(AVAES *a, int s, uint8_t *sbox, uint32_t *multbl, uint8_t *dst, uint8_t *src){
int r;
for(r=a->rounds; r>1; r--){
addkey(a->state, a->round_key[r]);
addkey(a->state[1], src, a->round_key[a->rounds]);
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]);
}
addkey(a->state, a->round_key[1]);
subshift(a->state[0][0], s, sbox);
addkey(a->state, a->round_key[0]);
addkey(dst, a->state[0], a->round_key[0]);
}
static void aes_decrypt(AVAES *a){
crypt(a, 0, inv_sbox, dec_multbl);
static void aes_decrypt(AVAES *a, uint8_t *dst, uint8_t *src){
crypt(a, 0, inv_sbox, dec_multbl, dst, src);
}
static void aes_encrypt(AVAES *a){
crypt(a, 2, sbox, enc_multbl);
static void aes_encrypt(AVAES *a, uint8_t *dst, uint8_t *src){
crypt(a, 2, sbox, enc_multbl, dst, src);
}
static void init_multbl2(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8, uint8_t *sbox){
@ -204,6 +204,7 @@ int main(){
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];
av_aes_init(&ae, "PI=3.141592654..", 128, 0);
av_aes_init(&ad, "PI=3.141592654..", 128, 1);
@ -211,28 +212,25 @@ int main(){
for(i=0; i<2; i++){
av_aes_init(&b, rkey[i], 128, 1);
memcpy(b.state, rct[i], 16);
aes_decrypt(&b);
aes_decrypt(&b, temp, rct[i]);
for(j=0; j<16; j++)
if(rpt[i][j] != b.state[1][0][j])
av_log(NULL, AV_LOG_ERROR, "%d %02X %02X\n", j, rpt[i][j], b.state[1][0][j]);
if(rpt[i][j] != temp[j])
av_log(NULL, AV_LOG_ERROR, "%d %02X %02X\n", j, rpt[i][j], temp[j]);
}
for(i=0; i<10000; i++){
for(j=0; j<16; j++){
pt[j]= random();
}
memcpy(ae.state, pt, 16);
{START_TIMER
aes_encrypt(&ae);
aes_encrypt(&ae, temp, pt);
if(!(i&(i-1)))
av_log(NULL, AV_LOG_ERROR, "%02X %02X %02X %02X\n", ae.state[1][0][0], ae.state[1][1][1], ae.state[1][2][2], ae.state[1][3][3]);
memcpy(ad.state[0], ae.state[1], 16);
aes_decrypt(&ad);
av_log(NULL, AV_LOG_ERROR, "%02X %02X %02X %02X\n", temp[0], temp[5], temp[10], temp[15]);
aes_decrypt(&ad, temp, temp);
STOP_TIMER("aes")}
for(j=0; j<16; j++){
if(pt[j] != ad.state[1][0][j]){
av_log(NULL, AV_LOG_ERROR, "%d %d %02X %02X\n", i,j, pt[j], ad.state[1][0][j]);
if(pt[j] != temp[j]){
av_log(NULL, AV_LOG_ERROR, "%d %d %02X %02X\n", i,j, pt[j], temp[j]);
}
}
}