42 #if FF_API_CONTEXT_SIZE
52 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36
66 # define ROT(x, s) ((x >> s) | (x << (32-s)))
68 # define ROT(x, s) ((x << s) | (x >> (32-s)))
74 dst->
u64[0] = src->
u64[0] ^ round_key->
u64[0];
75 dst->
u64[1] = src->
u64[1] ^ round_key->
u64[1];
97 s0[0].
u8[ 0] = box[s0[1].
u8[ 0]];
98 s0[0].
u8[ 4] = box[s0[1].
u8[ 4]];
99 s0[0].
u8[ 8] = box[s0[1].
u8[ 8]];
100 s0[0].
u8[12] = box[s0[1].
u8[12]];
101 s1[0].
u8[ 3] = box[s1[1].
u8[ 7]];
102 s1[0].
u8[ 7] = box[s1[1].
u8[11]];
103 s1[0].
u8[11] = box[s1[1].
u8[15]];
104 s1[0].
u8[15] = box[s1[1].
u8[ 3]];
105 s0[0].
u8[ 2] = box[s0[1].
u8[10]];
106 s0[0].
u8[10] = box[s0[1].
u8[ 2]];
107 s0[0].
u8[ 6] = box[s0[1].
u8[14]];
108 s0[0].
u8[14] = box[s0[1].
u8[ 6]];
109 s3[0].
u8[ 1] = box[s3[1].
u8[13]];
110 s3[0].
u8[13] = box[s3[1].
u8[ 9]];
111 s3[0].
u8[ 9] = box[s3[1].
u8[ 5]];
112 s3[0].
u8[ 5] = box[s3[1].
u8[ 1]];
115 static inline int mix_core(uint32_t multbl[][256],
int a,
int b,
int c,
int d){
117 return multbl[0][
a] ^
ROT(multbl[0][b], 8) ^
ROT(multbl[0][c], 16) ^
ROT(multbl[0][d], 24);
119 return multbl[0][
a] ^ multbl[1][
b] ^ multbl[2][c] ^ multbl[3][d];
125 state[0].
u32[0] =
mix_core(multbl, src[0][0], src[s1 ][1], src[2][2], src[s3 ][3]);
126 state[0].
u32[1] =
mix_core(multbl, src[1][0], src[s3-1][1], src[3][2], src[s1-1][3]);
127 state[0].
u32[2] =
mix_core(multbl, src[2][0], src[s3 ][1], src[0][2], src[s1 ][3]);
128 state[0].
u32[3] =
mix_core(multbl, src[3][0], src[s1-1][1], src[1][2], src[s3-1][3]);
132 uint32_t multbl[][256])
136 for (r = a->
rounds - 1; r > 0; r--) {
137 mix(a->
state, multbl, 3 - s, 1 + s);
145 int count,
uint8_t *iv,
int decrypt)
175 for (i = 0; i < 256; i++) {
180 k = alog8[x + log8[c[0]]];
181 l = alog8[x + log8[c[1]]];
182 m = alog8[x + log8[c[2]]];
183 n = alog8[x + log8[c[3]]];
186 tbl[1][i] =
ROT(tbl[0][i], 8);
187 tbl[2][i] =
ROT(tbl[0][i], 16);
188 tbl[3][i] =
ROT(tbl[0][i], 24);
197 int i, j,
t, rconpointer = 0;
199 int KC = key_bits >> 5;
206 for (i = 0; i < 255; i++) {
207 alog8[i] = alog8[i + 255] = j;
213 for (i = 0; i < 256; i++) {
214 j = i ? alog8[255 - log8[i]] : 0;
215 j ^= (j << 1) ^ (j << 2) ^ (j << 3) ^ (j << 4);
216 j = (j ^ (j >> 8) ^ 99) & 255;
226 if (key_bits != 128 && key_bits != 192 && key_bits != 256)
231 memcpy(tk, key, KC * 4);
234 for (t = KC * 4; t < (rounds + 1) * 16; t += KC * 4) {
235 for (i = 0; i < 4; i++)
236 tk[0][i] ^=
sbox[tk[KC - 1][(i + 1) & 3]];
237 tk[0][0] ^=
rcon[rconpointer++];
239 for (j = 1; j < KC; j++) {
240 if (KC != 8 || j != KC >> 1)
241 for (i = 0; i < 4; i++)
242 tk[j][i] ^= tk[j - 1][i];
244 for (i = 0; i < 4; i++)
245 tk[j][i] ^=
sbox[tk[j - 1][i]];
252 for (i = 1; i <
rounds; i++) {
260 for (i = 0; i < (rounds + 1) >> 1; i++) {
273 int main(
int argc,
char **argv)
279 { 0x10, 0xa5, 0x88, 0x69, 0xd7, 0x4b, 0xe5, 0xa3,
280 0x74, 0xcf, 0x86, 0x7c, 0xfb, 0x47, 0x38, 0x59 }
283 { 0x6a, 0x84, 0x86, 0x7c, 0xd7, 0x7e, 0x12, 0xad,
284 0x07, 0xea, 0x1b, 0xe8, 0x95, 0xc5, 0x3f, 0xa3 },
288 { 0x73, 0x22, 0x81, 0xc0, 0xa0, 0xaa, 0xb8, 0xf7,
289 0xa5, 0x4a, 0x0c, 0x67, 0xa0, 0xc4, 0x5e, 0xcf },
290 { 0x6d, 0x25, 0x1e, 0x69, 0x44, 0xb0, 0x51, 0xe0,
291 0x4e, 0xaa, 0x6f, 0xb4, 0xdb, 0xf7, 0x84, 0x65 }
298 for (i = 0; i < 2; i++) {
301 for (j = 0; j < 16; j++) {
302 if (rpt[i][j] != temp[j]) {
304 j, rpt[i][j], temp[j]);
310 if (argc > 1 && !strcmp(argv[1],
"-t")) {
318 for (i = 0; i < 10000; i++) {
319 for (j = 0; j < 16; j++) {
326 av_log(
NULL, AV_LOG_ERROR,
"%02X %02X %02X %02X\n",
327 temp[0], temp[5], temp[10], temp[15]);
331 for (j = 0; j < 16; j++) {
332 if (pt[j] != temp[j]) {
333 av_log(
NULL, AV_LOG_ERROR,
"%d %d %02X %02X\n",
334 i, j, pt[j], temp[j]);