/* initialise context */
HashReturn Init(hashState* ctx) {
u8 i = 0;
/* output size (in bits) must be a positive integer less than or
equal to 512, and divisible by 8 */
if (LENGTH <= 0 || (LENGTH%8) || LENGTH > 512)
return BAD_HASHLEN;
/* set number of state columns and state size depending on
variant */
ctx->columns = COLS;
ctx->statesize = SIZE;
#if (LENGTH <= 256)
ctx->v = SHORT;
#else
ctx->v = LONG;
#endif
SET_CONSTANTS();
for (i=0; i<SIZE/8; i++)
ctx->chaining[i] = 0;
for (i=0; i<SIZE; i++)
ctx->buffer[i] = 0;
if (ctx->chaining == NULL || ctx->buffer == NULL)
return FAIL;
/* set initial value */
ctx->chaining[ctx->columns-1] = U64BIG((u64)LENGTH);
INIT(ctx->chaining);
/* set other variables */
ctx->buf_ptr = 0;
ctx->block_counter = 0;
ctx->bits_in_last_byte = 0;
return SUCCESS;
}
HashReturn_gr init_groestl( hashState_groestl* ctx, int hashlen )
{
int i;
ctx->hashlen = hashlen;
SET_CONSTANTS();
if (ctx->chaining == NULL || ctx->buffer == NULL)
return FAIL_GR;
for ( i = 0; i < SIZE512; i++ )
{
ctx->chaining[i] = _mm_setzero_si128();
ctx->buffer[i] = _mm_setzero_si128();
}
((u64*)ctx->chaining)[COLS-1] = U64BIG((u64)LENGTH);
INIT(ctx->chaining);
ctx->buf_ptr = 0;
ctx->rem_ptr = 0;
return SUCCESS_GR;
}
