summaryrefslogtreecommitdiffstats
path: root/aes.c
diff options
context:
space:
mode:
Diffstat (limited to 'aes.c')
-rw-r--r--aes.c80
1 files changed, 40 insertions, 40 deletions
diff --git a/aes.c b/aes.c
index e51f6d8..13c0a5f 100644
--- a/aes.c
+++ b/aes.c
@@ -168,7 +168,7 @@ static void KeyExpansion(void)
uint8_t tempa[4]; // Used for the column/row operations
// The first round key is the key itself.
- for(i = 0; i < Nk; ++i)
+ for (i = 0; i < Nk; ++i)
{
RoundKey[(i * 4) + 0] = Key[(i * 4) + 0];
RoundKey[(i * 4) + 1] = Key[(i * 4) + 1];
@@ -178,7 +178,7 @@ static void KeyExpansion(void)
// All other round keys are found from the previous round keys.
//i == Nk
- for(; i < Nb * (Nr + 1); ++i)
+ for (; i < Nb * (Nr + 1); ++i)
{
{
tempa[0]=RoundKey[(i-1) * 4 + 0];
@@ -238,9 +238,9 @@ static void KeyExpansion(void)
static void AddRoundKey(uint8_t round)
{
uint8_t i,j;
- for(i=0;i<4;++i)
+ for (i=0;i<4;++i)
{
- for(j = 0; j < 4; ++j)
+ for (j = 0; j < 4; ++j)
{
(*state)[i][j] ^= RoundKey[round * Nb * 4 + i * Nb + j];
}
@@ -252,9 +252,9 @@ static void AddRoundKey(uint8_t round)
static void SubBytes(void)
{
uint8_t i, j;
- for(i = 0; i < 4; ++i)
+ for (i = 0; i < 4; ++i)
{
- for(j = 0; j < 4; ++j)
+ for (j = 0; j < 4; ++j)
{
(*state)[j][i] = getSBoxValue((*state)[j][i]);
}
@@ -280,7 +280,7 @@ static void ShiftRows(void)
(*state)[0][2] = (*state)[2][2];
(*state)[2][2] = temp;
- temp = (*state)[1][2];
+ temp = (*state)[1][2];
(*state)[1][2] = (*state)[3][2];
(*state)[3][2] = temp;
@@ -302,7 +302,7 @@ static void MixColumns(void)
{
uint8_t i;
uint8_t Tmp,Tm,t;
- for(i = 0; i < 4; ++i)
+ for (i = 0; i < 4; ++i)
{
t = (*state)[i][0];
Tmp = (*state)[i][0] ^ (*state)[i][1] ^ (*state)[i][2] ^ (*state)[i][3] ;
@@ -339,8 +339,8 @@ static uint8_t Multiply(uint8_t x, uint8_t y)
static void InvMixColumns(void)
{
int i;
- uint8_t a,b,c,d;
- for(i=0;i<4;++i)
+ uint8_t a, b, c, d;
+ for (i = 0; i < 4; ++i)
{
a = (*state)[i][0];
b = (*state)[i][1];
@@ -360,9 +360,9 @@ static void InvMixColumns(void)
static void InvSubBytes(void)
{
uint8_t i,j;
- for(i=0;i<4;++i)
+ for (i = 0; i < 4; ++i)
{
- for(j=0;j<4;++j)
+ for (j = 0; j < 4; ++j)
{
(*state)[j][i] = getSBoxInvert((*state)[j][i]);
}
@@ -374,27 +374,27 @@ static void InvShiftRows(void)
uint8_t temp;
// Rotate first row 1 columns to right
- temp=(*state)[3][1];
- (*state)[3][1]=(*state)[2][1];
- (*state)[2][1]=(*state)[1][1];
- (*state)[1][1]=(*state)[0][1];
- (*state)[0][1]=temp;
+ temp = (*state)[3][1];
+ (*state)[3][1] = (*state)[2][1];
+ (*state)[2][1] = (*state)[1][1];
+ (*state)[1][1] = (*state)[0][1];
+ (*state)[0][1] = temp;
// Rotate second row 2 columns to right
- temp=(*state)[0][2];
- (*state)[0][2]=(*state)[2][2];
- (*state)[2][2]=temp;
+ temp = (*state)[0][2];
+ (*state)[0][2] = (*state)[2][2];
+ (*state)[2][2] = temp;
- temp=(*state)[1][2];
- (*state)[1][2]=(*state)[3][2];
- (*state)[3][2]=temp;
+ temp = (*state)[1][2];
+ (*state)[1][2] = (*state)[3][2];
+ (*state)[3][2] = temp;
// Rotate third row 3 columns to right
- temp=(*state)[0][3];
- (*state)[0][3]=(*state)[1][3];
- (*state)[1][3]=(*state)[2][3];
- (*state)[2][3]=(*state)[3][3];
- (*state)[3][3]=temp;
+ temp = (*state)[0][3];
+ (*state)[0][3] = (*state)[1][3];
+ (*state)[1][3] = (*state)[2][3];
+ (*state)[2][3] = (*state)[3][3];
+ (*state)[3][3] = temp;
}
@@ -409,7 +409,7 @@ static void Cipher(void)
// There will be Nr rounds.
// The first Nr-1 rounds are identical.
// These Nr-1 rounds are executed in the loop below.
- for(round = 1; round < Nr; ++round)
+ for (round = 1; round < Nr; ++round)
{
SubBytes();
ShiftRows();
@@ -434,7 +434,7 @@ static void InvCipher(void)
// There will be Nr rounds.
// The first Nr-1 rounds are identical.
// These Nr-1 rounds are executed in the loop below.
- for(round=Nr-1;round>0;round--)
+ for (round = (Nr - 1); round > 0; --round)
{
InvShiftRows();
InvSubBytes();
@@ -483,7 +483,7 @@ void AES_ECB_decrypt(const uint8_t* input, const uint8_t* key, uint8_t *output,
}
-#endif // #if defined(ECB) && ECB
+#endif // #if defined(ECB) && (ECB == 1)
@@ -495,7 +495,7 @@ void AES_ECB_decrypt(const uint8_t* input, const uint8_t* key, uint8_t *output,
static void XorWithIv(uint8_t* buf)
{
uint8_t i;
- for(i = 0; i < BLOCKLEN; ++i) //WAS for(i = 0; i < KEYLEN; ++i) but the block in AES is always 128bit so 16 bytes!
+ for (i = 0; i < BLOCKLEN; ++i) //WAS for(i = 0; i < KEYLEN; ++i) but the block in AES is always 128bit so 16 bytes!
{
buf[i] ^= Iv[i];
}
@@ -507,18 +507,18 @@ void AES_CBC_encrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, co
uint8_t extra = length % BLOCKLEN; /* Remaining bytes in the last non-full block */
// Skip the key expansion if key is passed as 0
- if(0 != key)
+ if (0 != key)
{
Key = key;
KeyExpansion();
}
- if(iv != 0)
+ if (iv != 0)
{
Iv = (uint8_t*)iv;
}
- for(i = 0; i < length; i += BLOCKLEN)
+ for (i = 0; i < length; i += BLOCKLEN)
{
XorWithIv(input);
memcpy(output, input, BLOCKLEN);
@@ -530,7 +530,7 @@ void AES_CBC_encrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, co
//printf("Step %d - %d", i/16, i);
}
- if(extra)
+ if (extra)
{
memcpy(output, input, extra);
state = (state_t*)output;
@@ -544,19 +544,19 @@ void AES_CBC_decrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, co
uint8_t extra = length % BLOCKLEN; /* Remaining bytes in the last non-full block */
// Skip the key expansion if key is passed as 0
- if(0 != key)
+ if (0 != key)
{
Key = key;
KeyExpansion();
}
// If iv is passed as 0, we continue to encrypt without re-setting the Iv
- if(iv != 0)
+ if (iv != 0)
{
Iv = (uint8_t*)iv;
}
- for(i = 0; i < length; i += BLOCKLEN)
+ for (i = 0; i < length; i += BLOCKLEN)
{
memcpy(output, input, BLOCKLEN);
state = (state_t*)output;
@@ -567,7 +567,7 @@ void AES_CBC_decrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, co
output += BLOCKLEN;
}
- if(extra)
+ if (extra)
{
memcpy(output, input, extra);
state = (state_t*)output;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 17:08:25 +0100