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decrease RAM usage using PROGMEM

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This commit is contained in:
AndreiD
2017-02-19 14:53:17 +02:00
committed by Ivan Grokhotkov
parent 8afe55267a
commit feed1ca219
9 changed files with 103 additions and 35 deletions
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32
crypto/aes.c
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@@ -220,20 +220,20 @@ void AES_set_key(AES_CTX *ctx, const uint8_t *key,
if ((i % words) == 0)
{
tmp2 =(uint32_t)aes_sbox[(tmp )&0xff]<< 8;
tmp2|=(uint32_t)aes_sbox[(tmp>> 8)&0xff]<<16;
tmp2|=(uint32_t)aes_sbox[(tmp>>16)&0xff]<<24;
tmp2|=(uint32_t)aes_sbox[(tmp>>24) ];
tmp2 =(uint32_t)(ax_array_read_u8(aes_sbox, (tmp )&0xff))<< 8;
tmp2|=(uint32_t)(ax_array_read_u8(aes_sbox, (tmp>> 8)&0xff))<<16;
tmp2|=(uint32_t)(ax_array_read_u8(aes_sbox, (tmp>>16)&0xff))<<24;
tmp2|=(uint32_t)(ax_array_read_u8(aes_sbox, (tmp>>24)));
tmp=tmp2^(((unsigned int)*ip)<<24);
ip++;
}
if ((words == 8) && ((i % words) == 4))
{
tmp2 =(uint32_t)aes_sbox[(tmp )&0xff] ;
tmp2|=(uint32_t)aes_sbox[(tmp>> 8)&0xff]<< 8;
tmp2|=(uint32_t)aes_sbox[(tmp>>16)&0xff]<<16;
tmp2|=(uint32_t)aes_sbox[(tmp>>24) ]<<24;
tmp2 =(uint32_t)(ax_array_read_u8(aes_sbox, (tmp )&0xff)) ;
tmp2|=(uint32_t)(ax_array_read_u8(aes_sbox, (tmp>> 8)&0xff))<< 8;
tmp2|=(uint32_t)(ax_array_read_u8(aes_sbox, (tmp>>16)&0xff))<<16;
tmp2|=(uint32_t)(ax_array_read_u8(aes_sbox, (tmp>>24) ))<<24;
tmp=tmp2;
}
@@ -369,10 +369,10 @@ static void AES_encrypt(const AES_CTX *ctx, uint32_t *data)
/* Perform ByteSub and ShiftRow operations together */
for (row = 0; row < 4; row++)
{
a0 = (uint32_t)aes_sbox[(data[row%4]>>24)&0xFF];
a1 = (uint32_t)aes_sbox[(data[(row+1)%4]>>16)&0xFF];
a2 = (uint32_t)aes_sbox[(data[(row+2)%4]>>8)&0xFF];
a3 = (uint32_t)aes_sbox[(data[(row+3)%4])&0xFF];
a0 = (uint32_t)(ax_array_read_u8(aes_sbox, (data[row%4]>>24)&0xFF));
a1 = (uint32_t)(ax_array_read_u8(aes_sbox, (data[(row+1)%4]>>16)&0xFF));
a2 = (uint32_t)(ax_array_read_u8(aes_sbox, (data[(row+2)%4]>>8)&0xFF));
a3 = (uint32_t)(ax_array_read_u8(aes_sbox, (data[(row+3)%4])&0xFF));
/* Perform MixColumn iff not last round */
if (curr_rnd < (rounds - 1))
@@ -417,10 +417,10 @@ static void AES_decrypt(const AES_CTX *ctx, uint32_t *data)
/* Perform ByteSub and ShiftRow operations together */
for (row = 4; row > 0; row--)
{
a0 = aes_isbox[(data[(row+3)%4]>>24)&0xFF];
a1 = aes_isbox[(data[(row+2)%4]>>16)&0xFF];
a2 = aes_isbox[(data[(row+1)%4]>>8)&0xFF];
a3 = aes_isbox[(data[row%4])&0xFF];
a0 = ax_array_read_u8(aes_isbox, (data[(row+3)%4]>>24)&0xFF);
a1 = ax_array_read_u8(aes_isbox, (data[(row+2)%4]>>16)&0xFF);
a2 = ax_array_read_u8(aes_isbox, (data[(row+1)%4]>>8)&0xFF);
a3 = ax_array_read_u8(aes_isbox, (data[row%4])&0xFF);
/* Perform MixColumn iff not last round */
if (curr_rnd<(rounds-1))