📄 aes.cpp
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if (nrounds > 10)
{
/* round 10: */
s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[40];
s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[41];
s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[42];
s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[43];
/* round 11: */
t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[44];
t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[45];
t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[46];
t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[47];
if (nrounds > 12)
{
/* round 12: */
s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[48];
s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[49];
s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[50];
s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[51];
/* round 13: */
t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[52];
t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[53];
t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[54];
t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[55];
}
}
rk += nrounds << 2;
#else /* !FULL_UNROLL */
/*
* nrounds - 1 full rounds:
*/
r = nrounds >> 1;
for (;;)
{
t0 =
Te0[(s0 >> 24) ] ^
Te1[(s1 >> 16) & 0xff] ^
Te2[(s2 >> 8) & 0xff] ^
Te3[(s3 ) & 0xff] ^
rk[4];
t1 =
Te0[(s1 >> 24) ] ^
Te1[(s2 >> 16) & 0xff] ^
Te2[(s3 >> 8) & 0xff] ^
Te3[(s0 ) & 0xff] ^
rk[5];
t2 =
Te0[(s2 >> 24) ] ^
Te1[(s3 >> 16) & 0xff] ^
Te2[(s0 >> 8) & 0xff] ^
Te3[(s1 ) & 0xff] ^
rk[6];
t3 =
Te0[(s3 >> 24) ] ^
Te1[(s0 >> 16) & 0xff] ^
Te2[(s1 >> 8) & 0xff] ^
Te3[(s2 ) & 0xff] ^
rk[7];
rk += 8;
if (--r == 0)
break;
s0 =
Te0[(t0 >> 24) ] ^
Te1[(t1 >> 16) & 0xff] ^
Te2[(t2 >> 8) & 0xff] ^
Te3[(t3 ) & 0xff] ^
rk[0];
s1 =
Te0[(t1 >> 24) ] ^
Te1[(t2 >> 16) & 0xff] ^
Te2[(t3 >> 8) & 0xff] ^
Te3[(t0 ) & 0xff] ^
rk[1];
s2 =
Te0[(t2 >> 24) ] ^
Te1[(t3 >> 16) & 0xff] ^
Te2[(t0 >> 8) & 0xff] ^
Te3[(t1 ) & 0xff] ^
rk[2];
s3 =
Te0[(t3 >> 24) ] ^
Te1[(t0 >> 16) & 0xff] ^
Te2[(t1 >> 8) & 0xff] ^
Te3[(t2 ) & 0xff] ^
rk[3];
}
#endif /* ?FULL_UNROLL */
/*
* apply last round and
* map cipher state to byte array block:
*/
s0 =
(Te4[(t0 >> 24) ] & 0xff000000) ^
(Te4[(t1 >> 16) & 0xff] & 0x00ff0000) ^
(Te4[(t2 >> 8) & 0xff] & 0x0000ff00) ^
(Te4[(t3 ) & 0xff] & 0x000000ff) ^
rk[0];
PUTU32(ciphertext , s0);
s1 =
(Te4[(t1 >> 24) ] & 0xff000000) ^
(Te4[(t2 >> 16) & 0xff] & 0x00ff0000) ^
(Te4[(t3 >> 8) & 0xff] & 0x0000ff00) ^
(Te4[(t0 ) & 0xff] & 0x000000ff) ^
rk[1];
PUTU32(ciphertext + 4, s1);
s2 =
(Te4[(t2 >> 24) ] & 0xff000000) ^
(Te4[(t3 >> 16) & 0xff] & 0x00ff0000) ^
(Te4[(t0 >> 8) & 0xff] & 0x0000ff00) ^
(Te4[(t1 ) & 0xff] & 0x000000ff) ^
rk[2];
PUTU32(ciphertext + 8, s2);
s3 =
(Te4[(t3 >> 24) ] & 0xff000000) ^
(Te4[(t0 >> 16) & 0xff] & 0x00ff0000) ^
(Te4[(t1 >> 8) & 0xff] & 0x0000ff00) ^
(Te4[(t2 ) & 0xff] & 0x000000ff) ^
rk[3];
PUTU32(ciphertext + 12, s3);
}
void Rijndael::rijndaelDecrypt(ULONG *rk, int nrounds, BYTE ciphertext[16], BYTE plaintext[16])
{
u32 s0, s1, s2, s3, t0, t1, t2, t3;
#ifndef FULL_UNROLL
int r;
#endif /* ?FULL_UNROLL */
/*
* map byte array block to cipher state
* and add initial round key:
*/
s0 = GETU32(ciphertext ) ^ rk[0];
s1 = GETU32(ciphertext + 4) ^ rk[1];
s2 = GETU32(ciphertext + 8) ^ rk[2];
s3 = GETU32(ciphertext + 12) ^ rk[3];
#ifdef FULL_UNROLL
/* round 1: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[ 4];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[ 5];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[ 6];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[ 7];
/* round 2: */
s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[ 8];
s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[ 9];
s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[10];
s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[11];
/* round 3: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[12];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[13];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[14];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[15];
/* round 4: */
s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[16];
s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[17];
s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[18];
s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[19];
/* round 5: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[20];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[21];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[22];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[23];
/* round 6: */
s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[24];
s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[25];
s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[26];
s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[27];
/* round 7: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[28];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[29];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[30];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[31];
/* round 8: */
s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[32];
s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[33];
s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[34];
s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[35];
/* round 9: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[36];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[37];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[38];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[39];
if (nrounds > 10)
{
/* round 10: */
s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[40];
s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[41];
s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[42];
s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[43];
/* round 11: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[44];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[45];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[46];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[47];
if (nrounds > 12)
{
/* round 12: */
s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[48];
s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[49];
s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[50];
s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[51];
/* round 13: */
t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[52];
t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[53];
t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[54];
t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[55];
}
}
rk += nrounds << 2;
#else /* !FULL_UNROLL */
/*
* nrounds - 1 full rounds:
*/
r = nrounds >> 1;
for (;;)
{
t0 =
Td0[(s0 >> 24) ] ^
Td1[(s3 >> 16) & 0xff] ^
Td2[(s2 >> 8) & 0xff] ^
Td3[(s1 ) & 0xff] ^
rk[4];
t1 =
Td0[(s1 >> 24) ] ^
Td1[(s0 >> 16) & 0xff] ^
Td2[(s3 >> 8) & 0xff] ^
Td3[(s2 ) & 0xff] ^
rk[5];
t2 =
Td0[(s2 >> 24) ] ^
Td1[(s1 >> 16) & 0xff] ^
Td2[(s0 >> 8) & 0xff] ^
Td3[(s3 ) & 0xff] ^
rk[6];
t3 =
Td0[(s3 >> 24) ] ^
Td1[(s2 >> 16) & 0xff] ^
Td2[(s1 >> 8) & 0xff] ^
Td3[(s0 ) & 0xff] ^
rk[7];
rk += 8;
if (--r == 0)
break;
s0 =
Td0[(t0 >> 24) ] ^
Td1[(t3 >> 16) & 0xff] ^
Td2[(t2 >> 8) & 0xff] ^
Td3[(t1 ) & 0xff] ^
rk[0];
s1 =
Td0[(t1 >> 24) ] ^
Td1[(t0 >> 16) & 0xff] ^
Td2[(t3 >> 8) & 0xff] ^
Td3[(t2 ) & 0xff] ^
rk[1];
s2 =
Td0[(t2 >> 24) ] ^
Td1[(t1 >> 16) & 0xff] ^
Td2[(t0 >> 8) & 0xff] ^
Td3[(t3 ) & 0xff] ^
rk[2];
s3 =
Td0[(t3 >> 24) ] ^
Td1[(t2 >> 16) & 0xff] ^
Td2[(t1 >> 8) & 0xff] ^
Td3[(t0 ) & 0xff] ^
rk[3];
}
#endif /* ?FULL_UNROLL */
/*
* apply last round and
* map cipher state to byte array block:
*/
s0 =
(Td4[(t0 >> 24) ] & 0xff000000) ^
(Td4[(t3 >> 16) & 0xff] & 0x00ff0000) ^
(Td4[(t2 >> 8) & 0xff] & 0x0000ff00) ^
(Td4[(t1 ) & 0xff] & 0x000000ff) ^
rk[0];
PUTU32(plaintext , s0);
s1 =
(Td4[(t1 >> 24) ] & 0xff000000) ^
(Td4[(t0 >> 16) & 0xff] & 0x00ff0000) ^
(Td4[(t3 >> 8) & 0xff] & 0x0000ff00) ^
(Td4[(t2 ) & 0xff] & 0x000000ff) ^
rk[1];
PUTU32(plaintext + 4, s1);
s2 =
(Td4[(t2 >> 24) ] & 0xff000000) ^
(Td4[(t1 >> 16) & 0xff] & 0x00ff0000) ^
(Td4[(t0 >> 8) & 0xff] & 0x0000ff00) ^
(Td4[(t3 ) & 0xff] & 0x000000ff) ^
rk[2];
PUTU32(plaintext + 8, s2);
s3 =
(Td4[(t3 >> 24) ] & 0xff000000) ^
(Td4[(t2 >> 16) & 0xff] & 0x00ff0000) ^
(Td4[(t1 >> 8) & 0xff] & 0x0000ff00) ^
(Td4[(t0 ) & 0xff] & 0x000000ff) ^
rk[3];
PUTU32(plaintext + 12, s3);
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