void ECRYPT_FFCSR::ECRYPT_ivsetup(
void* ctxa,
const u8* iv)
{
FFCSR_ctx* ctx = (FFCSR_ctx*)ctxa;
u32 i=0;
ctx->state[0] = ctx->init[0];
ctx->state[1] = ctx->init[1];
ctx->state[2] = ctx->init[2];
ctx->state[2] ^= iv[9]<<16 | iv[8]<<24;
ctx->state[3] = iv[7] | iv[6]<<8 | iv[5]<<16 | iv[4]<<24;
ctx->state[4] = iv[3] | iv[2]<<8 | iv[1]<<16 | iv[0]<<24;
ctx->carry[0] = 0;
ctx->carry[1] = 0;
ctx->carry[2] = 0;
ctx->carry[3] = 0;
ctx->carry[4] = 0;
for( i=0; i<160*(float(numRounds)/5) ; i++)
{
FFCSR_clock(ctx, numRounds);
}
}
void ECRYPT_FFCSR::FFCSR_process_bytes(int action, /* 0 = encrypt; 1 = decrypt; */
void* ctxa,
const u8* input,
u8* output,
u32 msglen) /* Message length in bytes. */
{
FFCSR_ctx* ctx = (FFCSR_ctx*)ctxa;
u32 i;
for (i = 0; i < msglen; i++) {
FFCSR_clock(ctx, _rounds);
output[i] = input[i] ^ FFCSR_filter(ctx, _rounds);
}
}