Upgrade TLS suites for GnuTLS, mbedTLS and OpenSSL

[umurmur.git] / src / ssli_gnutls.c

diff --git a/src/ssli_gnutls.c b/src/ssli_gnutls.c
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..1f72857fde756ee19b608000bab87538b0c3839b 100644 (file)
--- a/src/ssli_gnutls.c
+++ b/src/ssli_gnutls.c
@@ -0,0 +1,169 @@
+/* Copyright (C) 2015-2016, Felix Morgner <felix.morgner@gmail.com>
+
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   - Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+   - Neither the name of the Developers nor the names of its contributors may
+     be used to endorse or promote products derived from this software without
+     specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "ssl.h"
+#include "conf.h"
+#include "log.h"
+#include "memory.h"
+
+#include <stdlib.h>
+
+static gnutls_dh_params_t dhParameters;
+static gnutls_certificate_credentials_t certificate;
+
+static const char * ciphers = "NONE:"
+                                                         "+ECDHE-ECDSA:+ECDHE-RSA:+RSA:"
+                                                         "+AES-256-GCM:+AES-128-GCM:"
+                                                         "+AEAD:+SHA384:+SHA256:+SHA1:"
+                                                         "+CURVE-ALL:"
+                                                         "+COMP-NULL:"
+                                                         "+SIGN-ALL:"
+                                                         "+VERS-TLS1.2:+VERS-TLS1.0:"
+                                                         "+CTYPE-X509";
+
+static gnutls_priority_t cipherCache;
+
+void initializeCertificate()
+{
+       char* certificatePath = (char*) getStrConf(CERTIFICATE);
+
+       if(!certificatePath) {
+               Log_fatal("No certificate file specified.");
+       }
+
+       char* keyPath = (char*) getStrConf(KEY);
+
+       if(!keyPath) {
+               Log_fatal("No key file specified");
+       }
+
+       gnutls_certificate_allocate_credentials(&certificate);
+
+       int error = gnutls_certificate_set_x509_key_file(certificate, certificatePath, keyPath, GNUTLS_X509_FMT_PEM);
+
+       if( error != GNUTLS_E_SUCCESS ) {
+               Log_fatal("Could not open key (%s) or certificate (%s).", keyPath, certificatePath);
+       }
+}
+
+void SSLi_init()
+{
+       if(gnutls_priority_init(&cipherCache, ciphers, NULL) != GNUTLS_E_SUCCESS)
+       {
+               Log_fatal("Failed to set priorities");
+       }
+
+       initializeCertificate();
+
+       Log_info("Sucessfully initialized GNUTLS version %s", gnutls_check_version(NULL));
+}
+
+void SSLi_deinit()
+{
+       gnutls_certificate_free_credentials(certificate);
+       gnutls_priority_deinit(cipherCache);
+       gnutls_global_deinit();
+}
+
+SSL_handle_t * SSLi_newconnection( int * fileDescriptor, bool_t * isSSLReady )
+{
+       gnutls_session_t * session
+               = Memory_safeCalloc(1, sizeof(gnutls_session_t));
+
+       gnutls_init(session, GNUTLS_SERVER);
+       gnutls_priority_set(*session, cipherCache);
+       gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE, certificate);
+
+       gnutls_certificate_server_set_request(*session, GNUTLS_CERT_REQUIRE);
+
+       gnutls_transport_set_int(*session, *fileDescriptor);
+
+       if(isSSLReady && SSLi_nonblockaccept(session, isSSLReady))
+               *isSSLReady = true;
+
+       return session;
+}
+
+bool_t SSLi_getSHA1Hash(SSL_handle_t *session, uint8_t *hash)
+{
+       gnutls_datum_t const * certificateData = gnutls_certificate_get_peers(*session, NULL);
+
+       size_t resultSize = 0;
+       int error = gnutls_fingerprint( GNUTLS_DIG_SHA1, certificateData, hash, &resultSize);
+       return error == GNUTLS_E_SUCCESS && resultSize == 20;
+}
+
+int SSLi_nonblockaccept( SSL_handle_t *session, bool_t * isSSLReady )
+{
+       int error;
+       do {
+               error = gnutls_handshake(*session);
+       } while(error < GNUTLS_E_SUCCESS && !gnutls_error_is_fatal(error));
+
+       if ( error < GNUTLS_E_SUCCESS ) {
+               Log_warn("TLS handshake failed with error %i (%s).", error, gnutls_strerror(error));
+       }
+
+       if(isSSLReady)
+               *isSSLReady = true;
+
+       return error;
+}
+
+int SSLi_read(SSL_handle_t *session, uint8_t *buffer, int length)
+{
+       return gnutls_record_recv(*session, buffer, length);
+}
+
+int SSLi_write(SSL_handle_t *session, uint8_t *buffer, int length)
+{
+       return gnutls_record_send(*session, buffer, length);
+}
+
+int SSLi_get_error(SSL_handle_t *session, int code)
+{
+       return code;
+}
+
+bool_t SSLi_data_pending(SSL_handle_t *session)
+{
+       return gnutls_record_check_pending(*session);
+}
+
+void SSLi_shutdown(SSL_handle_t *session)
+{
+       gnutls_bye(*session, GNUTLS_SHUT_WR);
+}
+
+void SSLi_free(SSL_handle_t *session)
+{
+       gnutls_deinit(*session);
+       free(session);
+}