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pki: Add ecdsa support for signature_from_blob.

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This commit is contained in:
Andreas Schneider
2011-12-30 11:09:40 +01:00
parent 9070b04184
commit e9f5c7421e
1 changed files with 50 additions and 0 deletions
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50
src/pki_crypto.c
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@@ -1136,6 +1136,56 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
} }
break; break;
case SSH_KEYTYPE_ECDSA: case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
/* 40 is the dual signature blob len. */
if (len != 40) {
ssh_pki_log("Signature has wrong size: %lu",
(unsigned long)len);
ssh_signature_free(sig);
return NULL;
}
#ifdef DEBUG_CRYPTO
ssh_print_hexa("r", ssh_string_data(sig_blob), 20);
ssh_print_hexa("s", (unsigned char *)ssh_string_data(sig_blob) + 20, 20);
#endif
sig->ecdsa_sig = ECDSA_SIG_new();
if (sig->ecdsa_sig == NULL) {
ssh_signature_free(sig);
return NULL;
}
r = ssh_string_new(20);
if (r == NULL) {
ssh_signature_free(sig);
return NULL;
}
ssh_string_fill(r, ssh_string_data(sig_blob), 20);
sig->ecdsa_sig->r = make_string_bn(r);
ssh_string_free(r);
if (sig->ecdsa_sig->r == NULL) {
ssh_signature_free(sig);
return NULL;
}
s = ssh_string_new(20);
if (s == NULL) {
ssh_signature_free(sig);
return NULL;
}
ssh_string_fill(s, (char *)ssh_string_data(sig_blob) + 20, 20);
sig->ecdsa_sig->s = make_string_bn(s);
ssh_string_free(s);
if (sig->ecdsa_sig->s == NULL) {
ssh_signature_free(sig);
return NULL;
}
break;
#endif
case SSH_KEYTYPE_UNKNOWN: case SSH_KEYTYPE_UNKNOWN:
ssh_pki_log("Unknown signature type"); ssh_pki_log("Unknown signature type");
return NULL; return NULL;