/*******************************************************************************
* Function Name : AES_encrypt
* Description : Encrypts one block of 16 bytes
* Input : - input_pointer: input block address
* - expkey: encryption key
* Output : output_pointer
* Return : None
*******************************************************************************/
void AES_encrypt(u32* input_pointer, u32* output_pointer, u32* expkey)
{
register u32 t0;
register u32 t1;
register u32 t2;
register u32 t3;
register u32 s0;
register u32 s1;
register u32 s2;
register u32 s3;
register int r = 10;/*Round counter */
register u32* local_pointer = expkey;
s0 = input_pointer[0] ^ local_pointer[0];
s1 = input_pointer[1] ^ local_pointer[1];
s2 = input_pointer[2] ^ local_pointer[2];
s3 = input_pointer[3] ^ local_pointer[3];
local_pointer += 4;
/* ADD KEY before start round*/
for (;;)
{
t0 = WORD8_TO_WORD32( Sbox[byte0(s0)],
Sbox[byte1(s1)],
Sbox[byte2(s2)],
Sbox[byte3(s3)]);
t1 = WORD8_TO_WORD32( Sbox[byte0(s1)],
Sbox[byte1(s2)],
Sbox[byte2(s3)],
Sbox[byte3(s0)]);
t2 = WORD8_TO_WORD32( Sbox[byte0(s2)],
Sbox[byte1(s3)],
Sbox[byte2(s0)],
Sbox[byte3(s1)]);
t3 = WORD8_TO_WORD32( Sbox[byte0(s3)],
Sbox[byte1(s0)],
Sbox[byte2(s1)],
Sbox[byte3(s2)]);
/*End of SBOX + Shift ROW*/
s0 = fwd_mcol(t0)^local_pointer[0];
s1 = fwd_mcol(t1)^local_pointer[1];
s2 = fwd_mcol(t2)^local_pointer[2];
s3 = fwd_mcol(t3)^local_pointer[3];
/*End of mix colomn*/
local_pointer += 4;
if ( --r == 1)
{
break;
}
}/*End for(;;)*/
/*Start Last round*/
t0 = WORD8_TO_WORD32( Sbox[byte0(s0)],
Sbox[byte1(s1)],
Sbox[byte2(s2)],
Sbox[byte3(s3)]);
t1 = WORD8_TO_WORD32( Sbox[byte0(s1)],
Sbox[byte1(s2)],
Sbox[byte2(s3)],
Sbox[byte3(s0)]);
t2 = WORD8_TO_WORD32( Sbox[byte0(s2)],
Sbox[byte1(s3)],
Sbox[byte2(s0)],
Sbox[byte3(s1)]);
t3 = WORD8_TO_WORD32( Sbox[byte0(s3)],
Sbox[byte1(s0)],
Sbox[byte2(s1)],
Sbox[byte3(s2)]);
t0 ^= local_pointer[0];
t1 ^= local_pointer[1];
t2 ^= local_pointer[2];
t3 ^= local_pointer[3];
/*Store of the result of encryption*/
output_pointer[0] = t0;
output_pointer[1] = t1;
output_pointer[2] = t2;
output_pointer[3] = t3;
}
/*******************************************************************************
* Function Name : AES_encrypt
* Description : Encrypts one block of 16 bytes
* Input : - input_pointer: input block address
* - expkey: encryption key
* Output : output_pointer
* Return : None
*******************************************************************************/
void AES_encrypt(ot_u32* input_pointer, ot_u32* output_pointer, ot_u32* expkey) {
#if (AES_USEHW == ENABLED)
#elif (AES_USEFAST == ENABLED)
register ot_u32 s0;
register ot_u32 s1;
register ot_u32 s2;
register ot_u32 s3;
register ot_u32 t0;
register ot_u32 t1;
register ot_u32 t2;
register ot_u32 t3;
register int r = 10 >> 1;
register ot_u32* local_pointer = expkey;
s0 = input_pointer[0] ^ local_pointer[0];
s1 = input_pointer[1] ^ local_pointer[1];
s2 = input_pointer[2] ^ local_pointer[2];
s3 = input_pointer[3] ^ local_pointer[3];
for (;;) {
t0 = enc_table[byte0(s0)] ^
rot1(enc_table[byte1(s1)]) ^
rot2(enc_table[byte2(s2)]) ^
rot3(enc_table[byte3(s3)]) ^
local_pointer[4];
t1 = enc_table[byte0(s1)] ^
rot1(enc_table[byte1(s2)]) ^
rot2(enc_table[byte2(s3)]) ^
rot3(enc_table[byte3(s0)]) ^
local_pointer[5];
t2 = enc_table[byte0(s2)] ^
rot1(enc_table[byte1(s3)]) ^
rot2(enc_table[byte2(s0)]) ^
rot3(enc_table[byte3(s1)]) ^
local_pointer[6];
t3 = enc_table[byte0(s3)] ^
rot1(enc_table[byte1(s0)]) ^
rot2(enc_table[byte2(s1)]) ^
rot3(enc_table[byte3(s2)]) ^
local_pointer[7];
local_pointer += 8;
if (--r == 0) {
break;
}
s0 = enc_table[byte0(t0)] ^
rot1(enc_table[byte1(t1)]) ^
rot2(enc_table[byte2(t2)]) ^
rot3(enc_table[byte3(t3)]) ^
local_pointer[0];
s1 = enc_table[byte0(t1)] ^
rot1(enc_table[byte1(t2)]) ^
rot2(enc_table[byte2(t3)]) ^
rot3(enc_table[byte3(t0)]) ^
local_pointer[1];
s2 = enc_table[byte0(t2)] ^
rot1(enc_table[byte1(t3)]) ^
rot2(enc_table[byte2(t0)]) ^
rot3(enc_table[byte3(t1)]) ^
local_pointer[2];
s3 = enc_table[byte0(t3)] ^
rot1(enc_table[byte1(t0)]) ^
rot2(enc_table[byte2(t1)]) ^
rot3(enc_table[byte3(t2)]) ^
local_pointer[3];
}
output_pointer[0] = WORD8_TO_WORD32( Sbox[byte0(t0)],
Sbox[byte1(t1)],
Sbox[byte2(t2)],
Sbox[byte3(t3)]) ^ local_pointer[0];
output_pointer[1] = WORD8_TO_WORD32( Sbox[byte0(t1)],
Sbox[byte1(t2)],
Sbox[byte2(t3)],
Sbox[byte3(t0)]) ^ local_pointer[1];
output_pointer[2] = WORD8_TO_WORD32( Sbox[byte0(t2)],
Sbox[byte1(t3)],
Sbox[byte2(t0)],
Sbox[byte3(t1)]) ^ local_pointer[2];
output_pointer[3] = WORD8_TO_WORD32( Sbox[byte0(t3)],
Sbox[byte1(t0)],
Sbox[byte2(t1)],
Sbox[byte3(t2)]) ^ local_pointer[3];
#elif (AES_USELITE == ENABLED)
register ot_u32 t0;
register ot_u32 t1;
register ot_u32 t2;
register ot_u32 t3;
register ot_u32 s0;
register ot_u32 s1;
register ot_u32 s2;
register ot_u32 s3;
register int r = 10; // Round counter
register ot_u32* local_pointer = expkey;
s0 = input_pointer[0] ^ local_pointer[0];
s1 = input_pointer[1] ^ local_pointer[1];
s2 = input_pointer[2] ^ local_pointer[2];
s3 = input_pointer[3] ^ local_pointer[3];
local_pointer += 4;
// ADD KEY before start round
for (;;)
{
t0 = WORD8_TO_WORD32( Sbox[byte0(s0)],
Sbox[byte1(s1)],
Sbox[byte2(s2)],
Sbox[byte3(s3)]);
t1 = WORD8_TO_WORD32( Sbox[byte0(s1)],
Sbox[byte1(s2)],
Sbox[byte2(s3)],
Sbox[byte3(s0)]);
t2 = WORD8_TO_WORD32( Sbox[byte0(s2)],
Sbox[byte1(s3)],
Sbox[byte2(s0)],
Sbox[byte3(s1)]);
t3 = WORD8_TO_WORD32( Sbox[byte0(s3)],
Sbox[byte1(s0)],
Sbox[byte2(s1)],
Sbox[byte3(s2)]);
/*End of SBOX + Shift ROW*/
s0 = fwd_mcol(t0)^local_pointer[0];
s1 = fwd_mcol(t1)^local_pointer[1];
s2 = fwd_mcol(t2)^local_pointer[2];
s3 = fwd_mcol(t3)^local_pointer[3];
/*End of mix colomn*/
local_pointer += 4;
if ( --r == 1)
{
break;
}
}/*End for(;;)*/
/*Start Last round*/
t0 = WORD8_TO_WORD32( Sbox[byte0(s0)],
Sbox[byte1(s1)],
Sbox[byte2(s2)],
Sbox[byte3(s3)]);
t1 = WORD8_TO_WORD32( Sbox[byte0(s1)],
Sbox[byte1(s2)],
Sbox[byte2(s3)],
Sbox[byte3(s0)]);
t2 = WORD8_TO_WORD32( Sbox[byte0(s2)],
Sbox[byte1(s3)],
Sbox[byte2(s0)],
Sbox[byte3(s1)]);
t3 = WORD8_TO_WORD32( Sbox[byte0(s3)],
Sbox[byte1(s0)],
Sbox[byte2(s1)],
Sbox[byte3(s2)]);
t0 ^= local_pointer[0];
t1 ^= local_pointer[1];
t2 ^= local_pointer[2];
t3 ^= local_pointer[3];
/*Store of the result of encryption*/
output_pointer[0] = t0;
output_pointer[1] = t1;
output_pointer[2] = t2;
output_pointer[3] = t3;
#endif
}
