We use SHA512 instead of MD5 and SHA1.
*/
-static bool prf_xor(int nid, const uint8_t *secret, size_t secretlen, uint8_t *seed, size_t seedlen, uint8_t *out, size_t outlen) {
- digest_t *digest = digest_open_by_nid(nid, DIGEST_ALGO_SIZE);
+static bool prf_xor(nid_t nid, const uint8_t *secret, size_t secretlen, uint8_t *seed, size_t seedlen, uint8_t *out, size_t outlen) {
+ digest_t digest = {0};
- if(!digest) {
+ if(!digest_open_by_nid(&digest, nid, DIGEST_ALGO_SIZE)) {
+ digest_close(&digest);
return false;
}
- if(!digest_set_key(digest, secret, secretlen)) {
- digest_close(digest);
+ if(!digest_set_key(&digest, secret, secretlen)) {
+ digest_close(&digest);
return false;
}
- size_t len = digest_length(digest);
+ size_t len = digest_length(&digest);
/* Data is what the "inner" HMAC function processes.
It consists of the previous HMAC result plus the seed.
*/
- char data[len + seedlen];
+ char *data = alloca(len + seedlen);
memset(data, 0, len);
memcpy(data + len, seed, seedlen);
- uint8_t hash[len];
+ uint8_t *hash = alloca(len);
while(outlen > 0) {
/* Inner HMAC */
- if(!digest_create(digest, data, len + seedlen, data)) {
- digest_close(digest);
+ if(!digest_create(&digest, data, len + seedlen, data)) {
+ digest_close(&digest);
return false;
}
/* Outer HMAC */
- if(!digest_create(digest, data, len + seedlen, hash)) {
- digest_close(digest);
+ if(!digest_create(&digest, data, len + seedlen, hash)) {
+ digest_close(&digest);
return false;
}
outlen -= i;
}
- digest_close(digest);
+ digest_close(&digest);
return true;
}