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Implement AES algorithm

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This commit is contained in:
Manuel Thalmann 2023-11-14 11:06:11 +01:00
parent afe36cebe6
commit 4720e95cf2
1 changed files with 21 additions and 6 deletions
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27
aes/aes.cpp
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@ -161,9 +161,9 @@ void expandKey(uint8_t k[16], uint32_t ek[44]) {
/* Adding expanded round key (prepared before) */
void addRoundKey(t_state s, uint32_t ek[], short round) {
s[0] ^= ek[round];
s[1] ^= ek[round + 1];
s[2] ^= ek[round + 2];
s[3] ^= ek[round + 3];
s[1] ^= ek[round + 1];
s[2] ^= ek[round + 2];
s[3] ^= ek[round + 3];
}
void aes(uint8_t *in, uint8_t *out, uint8_t *skey)
@ -191,10 +191,25 @@ void aes(uint8_t *in, uint8_t *out, uint8_t *skey)
addRoundKey(state, expKey, 0);
printf("ARK: "); printstate(state);
/* ??? */
/* ??? */
/* ??? */
for (int i = 1; i <= 10; i++) {
subBytes(state);
printf("SB: ");
printstate(state);
shiftRows(state);
printf("SR: ");
printstate(state);
if (i < 10) {
mixColumns(state);
printf("MC: ");
printstate(state);
}
addRoundKey(state, expKey, 4*i);
printf("ARK: ");
printstate(state);
}
for (int i = 0; i < 16; i++) {
if (i < 4) out[i] = wbyte(state[0], i % 4);