#define DH_BITS 2048
#define DH_BITS_MIN 1024
+#define MAX_HASH_SIZE 64 /* from gnutls-int.h */
+
static gnutls_certificate_credentials_t x509_cred;
static gnutls_dh_params_t dh_params;
static bool ConnSSL_LoadServerKey_gnutls PARAMS(( void ));
#endif
+#define CERTFP_LEN (20 * 2 + 1)
+
static bool ConnSSL_Init_SSL PARAMS(( CONNECTION *c ));
static int ConnectAccept PARAMS(( CONNECTION *c, bool connect ));
static int ConnSSL_HandleError PARAMS(( CONNECTION *c, const int code, const char *fname ));
memcpy(buf, (char *)(array_start(pass)), size);
return size;
}
+
+
+static int
+Verify_openssl(UNUSED int preverify_ok, UNUSED X509_STORE_CTX *x509_ctx)
+{
+ return 1;
+}
#endif
bool ret = true;
if (!Conf_SSLOptions.DHFile) {
- Log(LOG_NOTICE, "Configuration option \"SSLDHFile\" not set!");
+ Log(LOG_NOTICE, "Configuration option \"DHFile\" not set!");
return false;
}
fp = fopen(Conf_SSLOptions.DHFile, "r");
}
if (need_dhgenerate) {
Log(LOG_WARNING,
- "SSLDHFile not set, generating %u bit DH parameters. This may take a while ...",
+ "DHFile not set, generating %u bit DH parameters. This may take a while ...",
DH_BITS);
err = gnutls_dh_params_generate2(tmp_dh_params, DH_BITS);
if (err < 0) {
SSL_shutdown(ssl);
SSL_free(ssl);
c->ssl_state.ssl = NULL;
+ if (c->ssl_state.fingerprint) {
+ free(c->ssl_state.fingerprint);
+ c->ssl_state.fingerprint = NULL;
+ }
}
#endif
#ifdef HAVE_LIBGNUTLS
bool
ConnSSL_InitLibrary( void )
{
- if (!array_bytes(&Conf_SSLOptions.ListenPorts))
+ if (!Conf_SSLInUse()) {
+ LogDebug("SSL not in use, skipping initialization.");
return true;
+ }
#ifdef HAVE_LIBSSL
SSL_CTX *newctx;
SSL_CTX_set_options(newctx, SSL_OP_SINGLE_DH_USE|SSL_OP_NO_SSLv2);
SSL_CTX_set_mode(newctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
+ SSL_CTX_set_verify(newctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE, Verify_openssl);
SSL_CTX_free(ssl_ctx);
ssl_ctx = newctx;
Log(LOG_INFO, "%s initialized.", SSLeay_version(SSLEAY_VERSION));
return false;
}
assert(c->ssl_state.ssl == NULL);
+ assert(c->ssl_state.fingerprint == NULL);
c->ssl_state.ssl = SSL_new(ssl_ctx);
if (!c->ssl_state.ssl) {
* http://www.mail-archive.com/help-gnutls@gnu.org/msg00286.html
*/
gnutls_transport_set_ptr(c->ssl_state.gnutls_session, (gnutls_transport_ptr_t) (long) c->sock);
+ gnutls_certificate_server_set_request(c->ssl_state.gnutls_session, GNUTLS_CERT_REQUEST);
ret = gnutls_credentials_set(c->ssl_state.gnutls_session, GNUTLS_CRD_CERTIFICATE, x509_cred);
if (ret < 0) {
Log(LOG_ERR, "gnutls_credentials_set: %s", gnutls_strerror(ret));
}
-/*
- Check an Handle Error return code after failed calls to ssl/tls functions.
- OpenSSL:
- SSL_connect(), SSL_accept(), SSL_do_handshake(), SSL_read(), SSL_peek(), or SSL_write() on ssl.
- GNUTLS:
- gnutlsssl_read(), gnutls_write() or gnutls_handshake().
- Return: -1 on fatal error, 0 if we can try again later.
+/**
+ * Check and handle error return codes after failed calls to SSL/TLS functions.
+ *
+ * OpenSSL:
+ * SSL_connect(), SSL_accept(), SSL_do_handshake(), SSL_read(), SSL_peek(), or
+ * SSL_write() on ssl.
+ *
+ * GNUTLS:
+ * gnutlsssl_read(), gnutls_write() or gnutls_handshake().
+ *
+ * @param c The connection handle.
+ * @prarm code The return code.
+ * @param fname The name of the function in which the error occurred.
+ * @return -1 on fatal errors, 0 if we can try again later.
*/
static int
-ConnSSL_HandleError( CONNECTION *c, const int code, const char *fname )
+ConnSSL_HandleError(CONNECTION * c, const int code, const char *fname)
{
#ifdef HAVE_LIBSSL
int ret = SSL_ERROR_SYSCALL;
case SSL_ERROR_ZERO_RETURN:
LogDebug("TLS/SSL connection shut down normally");
break;
- /*
- SSL_ERROR_WANT_CONNECT, SSL_ERROR_WANT_ACCEPT, SSL_ERROR_WANT_X509_LOOKUP
- */
case SSL_ERROR_SYSCALL:
+ /* SSL_ERROR_WANT_CONNECT, SSL_ERROR_WANT_ACCEPT,
+ * and SSL_ERROR_WANT_X509_LOOKUP */
sslerr = ERR_get_error();
if (sslerr) {
- Log( LOG_ERR, "%s: %s", fname, ERR_error_string(sslerr, NULL ));
+ Log(LOG_ERR, "%s: %s", fname,
+ ERR_error_string(sslerr, NULL));
} else {
switch (code) { /* EOF that violated protocol */
case 0:
- Log(LOG_ERR, "%s: Client Disconnected", fname );
+ Log(LOG_ERR, "%s: Client Disconnected", fname);
break;
- case -1: /* low level socket I/O error, check errno */
- Log(LOG_ERR, "%s: %s", fname, strerror(real_errno));
+ case -1: /* low level socket I/O error, check errno */
+ Log(LOG_ERR, "%s: %s", fname,
+ strerror(real_errno));
}
}
break;
LogOpenSSLError("TLS/SSL Protocol Error", fname);
break;
default:
- Log( LOG_ERR, "%s: Unknown error %d!", fname, ret);
+ Log(LOG_ERR, "%s: Unknown error %d!", fname, ret);
}
ConnSSL_Free(c);
return -1;
return ConnectAccept(c, true);
}
+static int
+ConnSSL_InitCertFp( CONNECTION *c )
+{
+ const char hex[] = "0123456789abcdef";
+ int i;
+
+#ifdef HAVE_LIBSSL
+ unsigned char digest[EVP_MAX_MD_SIZE];
+ unsigned int digest_size;
+ X509 *cert;
+
+ cert = SSL_get_peer_certificate(c->ssl_state.ssl);
+ if (!cert)
+ return 0;
+
+ if (!X509_digest(cert, EVP_sha1(), digest, &digest_size)) {
+ X509_free(cert);
+ return 0;
+ }
+
+ X509_free(cert);
+#endif /* HAVE_LIBSSL */
+#ifdef HAVE_LIBGNUTLS
+ gnutls_x509_crt_t cert;
+ unsigned int cert_list_size;
+ const gnutls_datum_t *cert_list;
+ unsigned char digest[MAX_HASH_SIZE];
+ size_t digest_size;
+
+ if (gnutls_certificate_type_get(c->ssl_state.gnutls_session) != GNUTLS_CRT_X509)
+ return 0;
+
+ if (gnutls_x509_crt_init(&cert) != GNUTLS_E_SUCCESS)
+ return 0;
+
+ cert_list_size = 0;
+ cert_list = gnutls_certificate_get_peers(c->ssl_state.gnutls_session,
+ &cert_list_size);
+ if (!cert_list) {
+ gnutls_x509_crt_deinit(cert);
+ return 0;
+ }
+
+ if (gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER) != GNUTLS_E_SUCCESS) {
+ gnutls_x509_crt_deinit(cert);
+ return 0;
+ }
+
+ digest_size = sizeof(digest);
+ if (gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_SHA1, digest, &digest_size)) {
+ gnutls_x509_crt_deinit(cert);
+ return 0;
+ }
+
+ gnutls_x509_crt_deinit(cert);
+#endif /* HAVE_LIBGNUTLS */
+
+ assert(c->ssl_state.fingerprint == NULL);
+
+ c->ssl_state.fingerprint = malloc(CERTFP_LEN);
+ if (!c->ssl_state.fingerprint)
+ return 0;
+
+ for (i = 0; i < (int)digest_size; i++) {
+ c->ssl_state.fingerprint[i * 2] = hex[digest[i] / 16];
+ c->ssl_state.fingerprint[i * 2 + 1] = hex[digest[i] % 16];
+ }
+ c->ssl_state.fingerprint[i * 2] = '\0';
+
+ return 1;
+}
/* accept/connect wrapper. if connect is true, connect to peer, otherwise wait for incoming connection */
static int
if (ret)
return ConnSSL_HandleError(c, ret, "gnutls_handshake");
#endif /* _GNUTLS */
+ (void)ConnSSL_InitCertFp(c);
+
Conn_OPTION_DEL(c, (CONN_SSL_WANT_WRITE|CONN_SSL_WANT_READ|CONN_SSL_CONNECT));
ConnSSL_LogCertInfo(c);
#endif
}
+char *
+ConnSSL_GetCertFp(CONNECTION *c)
+{
+ return c->ssl_state.fingerprint;
+}
+
+bool
+ConnSSL_SetCertFp(CONNECTION *c, const char *fingerprint)
+{
+ assert (c != NULL);
+ c->ssl_state.fingerprint = strdup(fingerprint);
+ return c->ssl_state.fingerprint != NULL;
+}
+#else
+
+bool
+ConnSSL_InitLibrary(void)
+{
+ return true;
+}
#endif /* SSL_SUPPORT */
/* -eof- */
projects / ngircd-alex.git / blobdiff