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S2S-TLS/OpenSSL: Fix handling of certificate information for incoming connections

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Show proper certificate information for incoming connections, too, and
not "peer did not present a certificate", regardless if the client sent
a certificate or not.

And free the client certificate structure "peer_cert" on incoming
connections as well!
This commit is contained in:
Alexander Barton 2024-01-02 21:10:17 +01:00
parent 08647ab1e7
commit 679505aab9
1 changed files with 30 additions and 16 deletions
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46
src/ngircd/conn-ssl.c
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@ -935,22 +935,36 @@ ConnSSL_LogCertInfo( CONNECTION * c, bool connect)
Log(LOG_INFO, "Connection %d: initialized %s using cipher %s, %s.",
c->sock, SSL_get_version(ssl), SSL_get_cipher(ssl), comp_alg);
peer_cert = SSL_get_peer_certificate(ssl);
if (peer_cert && connect) {
if (peer_cert) {
cert_seen = true;
/* Client: Check server certificate */
int err = SSL_get_verify_result(ssl);
if (err == X509_V_OK) {
const char *peername = SSL_get0_peername(ssl);
if (peername != NULL)
cert_ok = true;
LogDebug("X509_V_OK, peername = '%s'", peername);
} else
Log(LOG_ERR, "Certificate validation failed: %s",
X509_verify_cert_error_string(err));
snprintf(msg, sizeof(msg), "%svalid peer certificate",
cert_ok ? "" : "in");
LogOpenSSL_CertInfo(cert_ok ? LOG_DEBUG : LOG_ERR, peer_cert,
msg);
if (connect) {
/* Outgoing connection. Verify the remote server! */
int err = SSL_get_verify_result(ssl);
if (err == X509_V_OK) {
const char *peername = SSL_get0_peername(ssl);
if (peername != NULL)
cert_ok = true;
LogDebug("X509_V_OK, peername = '%s'", peername);
} else
Log(LOG_WARNING, "Certificate validation failed: %s!",
X509_verify_cert_error_string(err));
snprintf(msg, sizeof(msg), "Got %svalid server certificate",
cert_ok ? "" : "in");
LogOpenSSL_CertInfo(LOG_INFO, peer_cert, msg);
} else {
/* Incoming connection.
* Accept all certificates, don't depend on their
* validity: for example, we don't know the hostname
* to check, because we not yet even know if this is a
* server connection at all and if so, which one, so we
* don't know a host name to look for. On the other
* hand we want client certificates, for example for
* "CertFP" authentication with services ... */
LogOpenSSL_CertInfo(LOG_INFO, peer_cert,
"Got unchecked client certificate");
}
X509_free(peer_cert);
}
@ -1038,7 +1052,7 @@ done_cn_validation:
if (cert_ok)
Conn_OPTION_ADD(c, CONN_SSL_PEERCERT_OK);
if (!cert_seen)
Log(LOG_INFO, "Peer did not present a certificate");
Log(LOG_INFO, "Peer did not present a certificate.");
}