diff options
Diffstat (limited to 'librabbitmq/amqp-gnutls.c')
| -rw-r--r-- | librabbitmq/amqp-gnutls.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/librabbitmq/amqp-gnutls.c b/librabbitmq/amqp-gnutls.c new file mode 100644 index 0000000..a435371 --- /dev/null +++ b/librabbitmq/amqp-gnutls.c @@ -0,0 +1,244 @@ +/* + * Copyright 2012 Michael Steinert + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "amqp_private.h" +#include "amqp-ssl.h" +#include <gnutls/gnutls.h> +#include <gnutls/x509.h> +#include <stdlib.h> + +struct amqp_ssl_socket_context { + gnutls_session_t session; + gnutls_certificate_credentials_t credentials; + char *host; +}; + +static ssize_t +amqp_ssl_socket_send(AMQP_UNUSED int sockfd, + const void *buf, + size_t len, + AMQP_UNUSED int flags, + void *user_data) +{ + struct amqp_ssl_socket_context *self = user_data; + return gnutls_record_send(self->session, buf, len); +} + +static ssize_t +amqp_ssl_socket_writev(AMQP_UNUSED int sockfd, + const struct iovec *iov, + int iovcnt, + void *user_data) +{ + struct amqp_ssl_socket_context *self = user_data; + char *buffer, *bufferp; + ssize_t written = -1; + size_t bytes; + int i; + bytes = 0; + for (i = 0; i < iovcnt; ++i) { + bytes += iov[i].iov_len; + } + buffer = malloc(bytes); + if (!buffer) { + goto exit; + } + bufferp = buffer; + for (i = 0; i < iovcnt; ++i) { + memcpy(bufferp, iov[i].iov_base, iov[i].iov_len); + bufferp += iov[i].iov_len; + } + written = gnutls_record_send(self->session, buffer, bytes); +exit: + free(buffer); + return written; +} + +static ssize_t +amqp_ssl_socket_recv(AMQP_UNUSED int sockfd, + void *buf, + size_t len, + AMQP_UNUSED int flags, + void *user_data) +{ + struct amqp_ssl_socket_context *self = user_data; + return gnutls_record_recv(self->session, buf, len); +} + +static int +amqp_ssl_socket_close(int sockfd, + void *user_data) +{ + int status = -1; + struct amqp_ssl_socket_context *self = user_data; + if (sockfd >= 0) { + status = amqp_socket_close(sockfd, 0); + } + if (self) { + gnutls_deinit(self->session); + gnutls_certificate_free_credentials(self->credentials); + free(self->host); + free(self); + } + return status; +} + +static int +amqp_ssl_socket_error(AMQP_UNUSED void *user_data) +{ + return -1; +} + +static int +amqp_ssl_verify(gnutls_session_t session) +{ + int ret; + unsigned int status, size; + const gnutls_datum_t *list; + gnutls_x509_crt_t cert = NULL; + struct amqp_ssl_socket_context *self = gnutls_session_get_ptr(session); + ret = gnutls_certificate_verify_peers2(session, &status); + if (0 > ret) { + goto error; + } + if (status & GNUTLS_CERT_INVALID) { + goto error; + } + if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) { + goto error; + } + if (status & GNUTLS_CERT_REVOKED) { + goto error; + } + if (status & GNUTLS_CERT_EXPIRED) { + goto error; + } + if (status & GNUTLS_CERT_NOT_ACTIVATED) { + goto error; + } + if (gnutls_certificate_type_get(session) != GNUTLS_CRT_X509) { + goto error; + } + if (gnutls_x509_crt_init(&cert) < 0) { + goto error; + } + list = gnutls_certificate_get_peers(session, &size); + if (!list) { + goto error; + } + ret = gnutls_x509_crt_import(cert, &list[0], GNUTLS_X509_FMT_DER); + if (0 > ret) { + goto error; + } + if (!gnutls_x509_crt_check_hostname(cert, self->host)) { + goto error; + } + gnutls_x509_crt_deinit(cert); + return 0; +error: + if (cert) { + gnutls_x509_crt_deinit (cert); + } + return GNUTLS_E_CERTIFICATE_ERROR; +} + +int +amqp_open_ssl_socket(amqp_connection_state_t state, + const char *host, + int port, + const char *cacert, + const char *key, + const char *cert) +{ + struct amqp_ssl_socket_context *self; + const char *error; + int sockfd = -1; + int ret; + gnutls_global_init(); + self = calloc(1, sizeof(*self)); + if (!self) { + goto error; + } + self->host = strdup(host); + if (!self->host) { + goto error; + } + ret = gnutls_certificate_allocate_credentials(&self->credentials); + if (GNUTLS_E_SUCCESS != ret) { + goto error; + } + ret = gnutls_certificate_set_x509_trust_file(self->credentials, + cacert, + GNUTLS_X509_FMT_PEM); + if (0 > ret) { + goto error; + } + gnutls_certificate_set_verify_function(self->credentials, + amqp_ssl_verify); + if (key && cert) { + ret = gnutls_certificate_set_x509_key_file( + self->credentials, cert, key, + GNUTLS_X509_FMT_PEM); + if (0 > ret) { + goto error; + } + } + ret = gnutls_init(&self->session, GNUTLS_CLIENT); + if (GNUTLS_E_SUCCESS != ret) { + goto error; + } + gnutls_session_set_ptr(self->session, self); + ret = gnutls_priority_set_direct(self->session, "NORMAL", &error); + if (GNUTLS_E_SUCCESS != ret) { + goto error; + } + ret = gnutls_credentials_set(self->session, GNUTLS_CRD_CERTIFICATE, + self->credentials); + if (GNUTLS_E_SUCCESS != ret) { + goto error; + } + sockfd = amqp_open_socket(host, port); + if (0 > sockfd) { + goto error; + } + gnutls_transport_set_ptr(self->session, (gnutls_transport_ptr_t)sockfd); + do { + ret = gnutls_handshake(self->session); + } while (ret < 0 && !gnutls_error_is_fatal(ret)); + amqp_set_sockfd_full(state, sockfd, + amqp_ssl_socket_writev, + amqp_ssl_socket_send, + amqp_ssl_socket_recv, + amqp_ssl_socket_close, + amqp_ssl_socket_error, + self); +exit: + return sockfd; +error: + amqp_ssl_socket_close(sockfd, self); + sockfd = -1; + goto exit; +} |