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#include "config.h"
#include "endian.h"
#include "hash_u5.h"
#include <string.h>
void hash_u5_init(struct hash_u5 *hu5, const char *hrp)
{
hu5->buf = 0;
hu5->num_bits = 0;
sha256_init(&hu5->hash);
sha256_update(&hu5->hash, hrp, strlen(hrp));
}
void hash_u5(struct hash_u5 *hu5, const u8 *u5, size_t len)
{
size_t bits = len * 5;
while (bits) {
size_t n = 5;
if (bits < n)
n = bits;
hu5->buf <<= n;
hu5->buf |= (*u5 >> (5-n));
bits -= n;
hu5->num_bits += n;
if (n == 5)
u5++;
if (hu5->num_bits >= 32) {
be32 be32 = cpu_to_be32((u32)(hu5->buf >> (hu5->num_bits-32)));
sha256_update(&hu5->hash, &be32, sizeof(be32));
hu5->num_bits -= 32;
}
}
}
void hash_u5_done(struct hash_u5 *hu5, struct sha256 *res)
{
if (hu5->num_bits) {
be32 be32 = cpu_to_be32((u32)(hu5->buf << (32 - hu5->num_bits)));
sha256_update(&hu5->hash, &be32, (hu5->num_bits + 7) / 8);
}
sha256_done(&hu5->hash, res);
}