[Ffmpeg-cvslog] r7554 - trunk/libavutil/aes.c
michael
subversion
Tue Jan 16 20:50:49 CET 2007
Author: michael
Date: Tue Jan 16 20:50:49 2007
New Revision: 7554
Modified:
trunk/libavutil/aes.c
Log:
fix CONFIG_SMALL again
Modified: trunk/libavutil/aes.c
==============================================================================
--- trunk/libavutil/aes.c (original)
+++ trunk/libavutil/aes.c Tue Jan 16 20:50:49 2007
@@ -59,30 +59,20 @@
s3[0][1]=box[s3[1][13]]; s3[0][13]=box[s3[1][ 9]]; s3[0][ 9]=box[s3[1][ 5]]; s3[0][ 5]=box[s3[1][ 1]];
}
-#define ROT(x,s) ((x<<s)|(x>>(32-s)))
-#if 0
-static inline void mix(uint8_t state[4][4], uint32_t multbl[4][256]){
- int i;
- for(i=0; i<4; i++)
+static inline int mix_core(uint32_t multbl[4][256], int a, int b, int c, int d){
#ifdef CONFIG_SMALL
- ((uint32_t *)(state))[i] = multbl[0][state[i][0]] ^ ROT(multbl[0][state[i][1]], 8)
- ^ROT(multbl[0][state[i][2]],16) ^ ROT(multbl[0][state[i][3]],24);
+#define ROT(x,s) ((x<<s)|(x>>(32-s)))
+ return multbl[0][a] ^ ROT(multbl[0][b], 8) ^ ROT(multbl[0][c], 16) ^ ROT(multbl[0][d], 24);
#else
- ((uint32_t *)(state))[i] = multbl[0][state[i][0]] ^ multbl[1][state[i][1]]
- ^multbl[2][state[i][2]] ^ multbl[3][state[i][3]];
+ return multbl[0][a] ^ multbl[1][b] ^ multbl[2][c] ^ multbl[3][d];
#endif
}
-#endif
static inline void mix(uint8_t state[2][4][4], uint32_t multbl[4][256], int s1, int s3){
- ((uint32_t *)(state))[0] = multbl[0][state[1][0][0]] ^ multbl[1][state[1][s1 ][1]]
- ^multbl[2][state[1][2][2]] ^ multbl[3][state[1][s3 ][3]];
- ((uint32_t *)(state))[1] = multbl[0][state[1][1][0]] ^ multbl[1][state[1][s3-1][1]]
- ^multbl[2][state[1][3][2]] ^ multbl[3][state[1][s1-1][3]];
- ((uint32_t *)(state))[2] = multbl[0][state[1][2][0]] ^ multbl[1][state[1][s3 ][1]]
- ^multbl[2][state[1][0][2]] ^ multbl[3][state[1][s1 ][3]];
- ((uint32_t *)(state))[3] = multbl[0][state[1][3][0]] ^ multbl[1][state[1][s1-1][1]]
- ^multbl[2][state[1][1][2]] ^ multbl[3][state[1][s3-1][3]];
+ ((uint32_t *)(state))[0] = mix_core(multbl, state[1][0][0], state[1][s1 ][1], state[1][2][2], state[1][s3 ][3]);
+ ((uint32_t *)(state))[1] = mix_core(multbl, state[1][1][0], state[1][s3-1][1], state[1][3][2], state[1][s1-1][3]);
+ ((uint32_t *)(state))[2] = mix_core(multbl, state[1][2][0], state[1][s3 ][1], state[1][0][2], state[1][s1 ][3]);
+ ((uint32_t *)(state))[3] = mix_core(multbl, state[1][3][0], state[1][s1-1][1], state[1][1][2], state[1][s3-1][3]);
}
static inline void crypt(AVAES *a, int s, uint8_t *sbox, uint32_t *multbl){
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