return ECDSA_size(*ecdsa);
}
+// TODO: standardise output format?
+
bool ecdsa_sign(ecdsa_t *ecdsa, const void *in, size_t len, void *sig) {
- logger(LOG_ERR, "Unable to perform ECDSA signature: %s", ERR_error_string(ERR_get_error(), NULL));
- return false;
+ unsigned int siglen = ECDSA_size(*ecdsa);
+
+ char hash[SHA512_DIGEST_LENGTH];
+ SHA512(in, len, hash);
+
+ memset(sig, 0, siglen);
+
+ if(!ECDSA_sign(0, hash, sizeof hash, sig, &siglen, *ecdsa)) {
+ logger(LOG_DEBUG, "ECDSA_sign() failed: %s", ERR_error_string(ERR_get_error(), NULL));
+ return false;
+ }
+
+ if(siglen != ECDSA_size(*ecdsa)) {
+ logger(LOG_ERR, "Signature length %d != %d", siglen, ECDSA_size(*ecdsa));
+ }
+
+ return true;
}
bool ecdsa_verify(ecdsa_t *ecdsa, const void *in, size_t len, const void *sig) {
- logger(LOG_ERR, "Unable to perform ECDSA verification: %s", ERR_error_string(ERR_get_error(), NULL));
- return false;
+ unsigned int siglen = ECDSA_size(*ecdsa);
+
+ char hash[SHA512_DIGEST_LENGTH];
+ SHA512(in, len, hash);
+
+ if(!ECDSA_verify(0, hash, sizeof hash, sig, siglen, *ecdsa)) {
+ logger(LOG_DEBUG, "ECDSA_verify() failed: %s", ERR_error_string(ERR_get_error(), NULL));
+ return false;
+ }
+
+ return true;
}