-/*
- * tls.c TLS support functions
- *
- * Author: Landon Fuller <landonf@threerings.net>
- *
- * Version $Id$
- *
- * This file was contributed to the Bacula project by Landon Fuller
- * and Three Rings Design, Inc.
- *
- * Three Rings Design, Inc. has been granted a perpetual, worldwide,
- * non-exclusive, no-charge, royalty-free, irrevocable copyright
- * license to reproduce, prepare derivative works of, publicly
- * display, publicly perform, sublicense, and distribute the original
- * work contributed by Three Rings Design, Inc. and its employees to
- * the Bacula project in source or object form.
- *
- * If you wish to license contributions from Three Rings Design, Inc,
- * under an alternate open source license please contact
- * Landon Fuller <landonf@threerings.net>.
- */
/*
Bacula® - The Network Backup Solution
- Copyright (C) 2005-2006 Free Software Foundation Europe e.V.
+ Copyright (C) 2005-2010 Free Software Foundation Europe e.V.
The main author of Bacula is Kern Sibbald, with contributions from
many others, a complete list can be found in the file AUTHORS.
This program is Free Software; you can redistribute it and/or
- modify it under the terms of version two of the GNU General Public
- License as published by the Free Software Foundation plus additions
- that are listed in the file LICENSE.
+ modify it under the terms of version three of the GNU Affero General Public
+ License as published by the Free Software Foundation and included
+ in the file LICENSE.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Bacula® is a registered trademark of John Walker.
+ Bacula® is a registered trademark of Kern Sibbald.
The licensor of Bacula is the Free Software Foundation Europe
(FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
Switzerland, email:ftf@fsfeurope.org.
*/
+/*
+ * tls.c TLS support functions
+ *
+ * Author: Landon Fuller <landonf@threerings.net>
+ *
+ * This file was contributed to the Bacula project by Landon Fuller
+ * and Three Rings Design, Inc.
+ *
+ * Three Rings Design, Inc. has been granted a perpetual, worldwide,
+ * non-exclusive, no-charge, royalty-free, irrevocable copyright
+ * license to reproduce, prepare derivative works of, publicly
+ * display, publicly perform, sublicense, and distribute the original
+ * work contributed by Three Rings Design, Inc. and its employees to
+ * the Bacula project in source or object form.
+ *
+ * If you wish to license contributions from Three Rings Design, Inc,
+ * under an alternate open source license please contact
+ * Landon Fuller <landonf@threerings.net>.
+ */
#include "bacula.h"
#include <assert.h>
-extern time_t watchdog_time;
#ifdef HAVE_TLS /* Is TLS enabled? */
SSL_CTX *openssl;
CRYPTO_PEM_PASSWD_CB *pem_callback;
const void *pem_userdata;
+ bool tls_enable;
+ bool tls_require;
};
struct TLS_Connection {
*/
static int openssl_verify_peer(int ok, X509_STORE_CTX *store)
{
-
if (!ok) {
X509 *cert = X509_STORE_CTX_get_current_cert(store);
int depth = X509_STORE_CTX_get_error_depth(store);
X509_NAME_oneline(X509_get_issuer_name(cert), issuer, 256);
X509_NAME_oneline(X509_get_subject_name(cert), subject, 256);
- Emsg5(M_ERROR, 0, _("Error with certificate at depth: %d, issuer = %s,"
- " subject = %s, ERR=%d:%s\n"), depth, issuer,
- subject, err, X509_verify_cert_error_string(err));
+ Jmsg5(NULL, M_ERROR, 0, _("Error with certificate at depth: %d, issuer = %s,"
+ " subject = %s, ERR=%d:%s\n"), depth, issuer,
+ subject, err, X509_verify_cert_error_string(err));
}
/* Dispatch user PEM encryption callbacks */
static int tls_pem_callback_dispatch (char *buf, int size, int rwflag, void *userdata)
{
- TLS_CONTEXT *ctx = (TLS_CONTEXT *) userdata;
+ TLS_CONTEXT *ctx = (TLS_CONTEXT *)userdata;
return (ctx->pem_callback(buf, size, ctx->pem_userdata));
}
BIO *bio;
DH *dh;
- ctx = (TLS_CONTEXT *) malloc(sizeof(TLS_CONTEXT));
+ ctx = (TLS_CONTEXT *)malloc(sizeof(TLS_CONTEXT));
/* Allocate our OpenSSL TLSv1 Context */
ctx->openssl = SSL_CTX_new(TLSv1_method());
if (!ctx->openssl) {
- openssl_post_errors(M_ERROR, _("Error initializing SSL context"));
+ openssl_post_errors(M_FATAL, _("Error initializing SSL context"));
goto err;
}
*/
if (ca_certfile || ca_certdir) {
if (!SSL_CTX_load_verify_locations(ctx->openssl, ca_certfile, ca_certdir)) {
- openssl_post_errors(M_ERROR, _("Error loading certificate verification stores"));
+ openssl_post_errors(M_FATAL, _("Error loading certificate verification stores"));
goto err;
}
} else if (verify_peer) {
/* At least one CA is required for peer verification */
- Emsg0(M_ERROR, 0, _("Either a certificate file or a directory must be"
+ Jmsg0(NULL, M_ERROR, 0, _("Either a certificate file or a directory must be"
" specified as a verification store\n"));
goto err;
}
*/
if (certfile) {
if (!SSL_CTX_use_certificate_chain_file(ctx->openssl, certfile)) {
- openssl_post_errors(M_ERROR, _("Error loading certificate file"));
+ openssl_post_errors(M_FATAL, _("Error loading certificate file"));
goto err;
}
}
/* Load our private key. */
if (keyfile) {
if (!SSL_CTX_use_PrivateKey_file(ctx->openssl, keyfile, SSL_FILETYPE_PEM)) {
- openssl_post_errors(M_ERROR, _("Error loading private key"));
+ openssl_post_errors(M_FATAL, _("Error loading private key"));
goto err;
}
}
/* Load Diffie-Hellman Parameters. */
if (dhfile) {
if (!(bio = BIO_new_file(dhfile, "r"))) {
- openssl_post_errors(M_ERROR, _("Unable to open DH parameters file"));
+ openssl_post_errors(M_FATAL, _("Unable to open DH parameters file"));
goto err;
}
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
BIO_free(bio);
if (!dh) {
- openssl_post_errors(M_ERROR, _("Unable to load DH parameters from specified file"));
+ openssl_post_errors(M_FATAL, _("Unable to load DH parameters from specified file"));
goto err;
}
if (!SSL_CTX_set_tmp_dh(ctx->openssl, dh)) {
- openssl_post_errors(M_ERROR, _("Failed to set TLS Diffie-Hellman parameters"));
+ openssl_post_errors(M_FATAL, _("Failed to set TLS Diffie-Hellman parameters"));
DH_free(dh);
goto err;
}
}
if (SSL_CTX_set_cipher_list(ctx->openssl, TLS_DEFAULT_CIPHERS) != 1) {
- Emsg0(M_ERROR, 0, _("Error setting cipher list, no valid ciphers available\n"));
+ Jmsg0(NULL, M_ERROR, 0,
+ _("Error setting cipher list, no valid ciphers available\n"));
goto err;
}
/* Verify Peer Certificate */
if (verify_peer) {
- /* SSL_VERIFY_FAIL_IF_NO_PEER_CERT has no effect in client mode */
- SSL_CTX_set_verify(ctx->openssl,
- SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
- openssl_verify_peer);
+ /* SSL_VERIFY_FAIL_IF_NO_PEER_CERT has no effect in client mode */
+ SSL_CTX_set_verify(ctx->openssl,
+ SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
+ openssl_verify_peer);
}
return ctx;
free(ctx);
}
+bool get_tls_require(TLS_CONTEXT *ctx)
+{
+ return ctx->tls_require;
+}
+
+bool get_tls_enable(TLS_CONTEXT *ctx)
+{
+ return ctx->tls_enable;
+}
+
+
/*
* Verifies a list of common names against the certificate
* commonName attribute.
* Returns: true on success
* false on failure
*/
-bool tls_postconnect_verify_cn(TLS_CONNECTION *tls, alist *verify_list)
+bool tls_postconnect_verify_cn(JCR *jcr, TLS_CONNECTION *tls, alist *verify_list)
{
SSL *ssl = tls->openssl;
X509 *cert;
/* Check if peer provided a certificate */
if (!(cert = SSL_get_peer_certificate(ssl))) {
- Emsg0(M_ERROR, 0, _("Peer failed to present a TLS certificate\n"));
+ Qmsg0(jcr, M_ERROR, 0, _("Peer failed to present a TLS certificate\n"));
return false;
}
* Returns: true on success
* false on failure
*/
-bool tls_postconnect_verify_host(TLS_CONNECTION *tls, const char *host)
+bool tls_postconnect_verify_host(JCR *jcr, TLS_CONNECTION *tls, const char *host)
{
SSL *ssl = tls->openssl;
X509 *cert;
X509_NAME *subject;
bool auth_success = false;
int extensions;
- char data[256];
int i, j;
+ int cnLastPos = -1;
+ X509_NAME_ENTRY *neCN;
+ ASN1_STRING *asn1CN;
/* Check if peer provided a certificate */
if (!(cert = SSL_get_peer_certificate(ssl))) {
- Emsg1(M_ERROR, 0, _("Peer %s failed to present a TLS certificate\n"), host);
+ Qmsg1(jcr, M_ERROR, 0,
+ _("Peer %s failed to present a TLS certificate\n"), host);
return false;
}
extname = OBJ_nid2sn(OBJ_obj2nid(X509_EXTENSION_get_object(ext)));
if (strcmp(extname, "subjectAltName") == 0) {
+#ifdef HAVE_OPENSSLv1
+ const X509V3_EXT_METHOD *method;
+#else
X509V3_EXT_METHOD *method;
+#endif
STACK_OF(CONF_VALUE) *val;
CONF_VALUE *nval;
void *extstr = NULL;
/* Try verifying against the subject name */
if (!auth_success) {
if ((subject = X509_get_subject_name(cert)) != NULL) {
- if (X509_NAME_get_text_by_NID(subject, NID_commonName, data, sizeof(data)) > 0) {
- /* NULL terminate data */
- data[255] = 0;
- if (strcasecmp(data, host) == 0) {
+ /* Loop through all CNs */
+ for (;;) {
+ cnLastPos = X509_NAME_get_index_by_NID(subject, NID_commonName, cnLastPos);
+ if (cnLastPos == -1) {
+ break;
+ }
+ neCN = X509_NAME_get_entry(subject, cnLastPos);
+ asn1CN = X509_NAME_ENTRY_get_data(neCN);
+ if (strcasecmp((const char*)asn1CN->data, host) == 0) {
auth_success = true;
+ break;
}
}
}
}
-
success:
X509_free(cert);
* Returns: Pointer to TLS_CONNECTION instance on success
* NULL on failure;
*/
-TLS_CONNECTION *new_tls_connection (TLS_CONTEXT *ctx, int fd)
+TLS_CONNECTION *new_tls_connection(TLS_CONTEXT *ctx, int fd)
{
BIO *bio;
bio = BIO_new(BIO_s_socket());
if (!bio) {
/* Not likely, but never say never */
- openssl_post_errors(M_ERROR, _("Error creating file descriptor-based BIO"));
+ openssl_post_errors(M_FATAL, _("Error creating file descriptor-based BIO"));
return NULL; /* Nothing allocated, nothing to clean up */
}
BIO_set_fd(bio, fd, BIO_NOCLOSE);
/* Allocate our new tls connection */
- TLS_CONNECTION *tls = (TLS_CONNECTION *) malloc(sizeof(TLS_CONNECTION));
+ TLS_CONNECTION *tls = (TLS_CONNECTION *)malloc(sizeof(TLS_CONNECTION));
/* Create the SSL object and attach the socket BIO */
if ((tls->openssl = SSL_new(ctx->openssl)) == NULL) {
/* Not likely, but never say never */
- openssl_post_errors(M_ERROR, _("Error creating new SSL object"));
+ openssl_post_errors(M_FATAL, _("Error creating new SSL object"));
goto err;
}
/* Non-blocking partial writes */
SSL_set_mode(tls->openssl, SSL_MODE_ENABLE_PARTIAL_WRITE|SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
- return (tls);
+ return tls;
err:
/* Clean up */
BIO_free(bio);
SSL_free(tls->openssl);
free(tls);
-
return NULL;
}
/*
* Free TLS_CONNECTION instance
*/
-void free_tls_connection (TLS_CONNECTION *tls)
+void free_tls_connection(TLS_CONNECTION *tls)
{
SSL_free(tls->openssl);
free(tls);
/* Zero the fdset, we'll set our fd prior to each invocation of select() */
FD_ZERO(&fdset);
- fdmax = bsock->fd + 1;
+ fdmax = bsock->m_fd + 1;
/* Ensure that socket is non-blocking */
- flags = bnet_set_nonblocking(bsock);
+ flags = bsock->set_nonblocking();
/* start timer */
bsock->timer_start = watchdog_time;
- bsock->timed_out = 0;
+ bsock->clear_timed_out();
for (;;) {
if (server) {
goto cleanup;
case SSL_ERROR_ZERO_RETURN:
/* TLS connection was cleanly shut down */
- openssl_post_errors(M_ERROR, _("Connect failure"));
+ openssl_post_errors(bsock->get_jcr(), M_FATAL, _("Connect failure"));
stat = false;
goto cleanup;
case SSL_ERROR_WANT_READ:
/* If we timeout of a select, this will be unset */
- FD_SET((unsigned) bsock->fd, &fdset);
+ FD_SET((unsigned) bsock->m_fd, &fdset);
/* Set our timeout */
tv.tv_sec = 10;
tv.tv_usec = 0;
/* Block until we can read */
- select(fdmax, &fdset, NULL, &fdset, &tv);
+ select(fdmax, &fdset, NULL, NULL, &tv);
break;
case SSL_ERROR_WANT_WRITE:
/* If we timeout of a select, this will be unset */
- FD_SET((unsigned) bsock->fd, &fdset);
+ FD_SET((unsigned) bsock->m_fd, &fdset);
/* Set our timeout */
tv.tv_sec = 10;
tv.tv_usec = 0;
/* Block until we can write */
- select(fdmax, NULL, &fdset, &fdset, &tv);
+ select(fdmax, NULL, &fdset, NULL, &tv);
break;
default:
- /* Socket Error Occured */
- openssl_post_errors(M_ERROR, _("Connect failure"));
+ /* Socket Error Occurred */
+ openssl_post_errors(bsock->get_jcr(), M_FATAL, _("Connect failure"));
stat = false;
goto cleanup;
}
- if (bsock->timed_out) {
+ if (bsock->is_timed_out()) {
goto cleanup;
}
}
cleanup:
/* Restore saved flags */
- bnet_restore_blocking(bsock, flags);
+ bsock->restore_blocking(flags);
/* Clear timer */
bsock->timer_start = 0;
bool tls_bsock_connect(BSOCK *bsock)
{
/* SSL_connect(bsock->tls) */
- return (openssl_bsock_session_start(bsock, false));
+ return openssl_bsock_session_start(bsock, false);
}
/*
bool tls_bsock_accept(BSOCK *bsock)
{
/* SSL_accept(bsock->tls) */
- return (openssl_bsock_session_start(bsock, true));
+ return openssl_bsock_session_start(bsock, true);
}
/*
* Shutdown TLS_CONNECTION instance
*/
-void tls_bsock_shutdown (BSOCK *bsock)
+void tls_bsock_shutdown(BSOCK *bsock)
{
/*
* SSL_shutdown must be called twice to fully complete the process -
* The first time to initiate the shutdown handshake, and the second to
* receive the peer's reply.
*
- * However, it is valid to close the SSL connection after the initial
- * shutdown notification is sent to the peer, without waiting for the
- * peer's reply, as long as you do not plan to re-use that particular
- * SSL connection object.
- *
- * Because we do not re-use SSL connection objects, I do not bother
- * calling SSL_shutdown a second time.
- *
* In addition, if the underlying socket is blocking, SSL_shutdown()
* will not return until the current stage of the shutdown process has
* completed or an error has occured. By setting the socket blocking
* we can avoid the ugly for()/switch()/select() loop.
*/
int err;
- int flags;
+
+ btimer_t *tid;
/* Set socket blocking for shutdown */
- flags = bnet_set_blocking(bsock);
+ bsock->set_blocking();
+ tid = start_bsock_timer(bsock, 60 * 2);
err = SSL_shutdown(bsock->tls->openssl);
+ stop_bsock_timer(tid);
+ if (err == 0) {
+ /* Complete shutdown */
+ tid = start_bsock_timer(bsock, 60 * 2);
+ err = SSL_shutdown(bsock->tls->openssl);
+ stop_bsock_timer(tid);
+ }
+
switch (SSL_get_error(bsock->tls->openssl, err)) {
- case SSL_ERROR_NONE:
- break;
- case SSL_ERROR_ZERO_RETURN:
- /* TLS connection was shut down on us via a TLS protocol-level closure */
- openssl_post_errors(M_ERROR, _("TLS shutdown failure."));
- break;
- default:
- /* Socket Error Occured */
- openssl_post_errors(M_ERROR, _("TLS shutdown failure."));
- break;
+ case SSL_ERROR_NONE:
+ break;
+ case SSL_ERROR_ZERO_RETURN:
+ /* TLS connection was shut down on us via a TLS protocol-level closure */
+ openssl_post_errors(bsock->get_jcr(), M_ERROR, _("TLS shutdown failure."));
+ break;
+ default:
+ /* Socket Error Occurred */
+ openssl_post_errors(bsock->get_jcr(), M_ERROR, _("TLS shutdown failure."));
+ break;
}
-
- /* Restore saved flags */
- bnet_restore_blocking(bsock, flags);
}
/* Does all the manual labor for tls_bsock_readn() and tls_bsock_writen() */
/* Zero the fdset, we'll set our fd prior to each invocation of select() */
FD_ZERO(&fdset);
- fdmax = bsock->fd + 1;
+ fdmax = bsock->m_fd + 1;
/* Ensure that socket is non-blocking */
- flags = bnet_set_nonblocking(bsock);
+ flags = bsock->set_nonblocking();
/* start timer */
bsock->timer_start = watchdog_time;
- bsock->timed_out = 0;
+ bsock->clear_timed_out();
nleft = nbytes;
while (nleft > 0) {
-
if (write) {
nwritten = SSL_write(tls->openssl, ptr, nleft);
} else {
ptr += nwritten;
}
break;
- case SSL_ERROR_ZERO_RETURN:
- /* TLS connection was cleanly shut down */
- openssl_post_errors(M_ERROR, _("TLS read/write failure."));
+
+ case SSL_ERROR_SYSCALL:
+ if (nwritten == -1) {
+ if (errno == EINTR) {
+ continue;
+ }
+ if (errno == EAGAIN) {
+ bmicrosleep(0, 20000); /* try again in 20 ms */
+ continue;
+ }
+ }
+ openssl_post_errors(bsock->get_jcr(), M_FATAL, _("TLS read/write failure."));
goto cleanup;
+
case SSL_ERROR_WANT_READ:
- /* If we timeout of a select, this will be unset */
- FD_SET((unsigned) bsock->fd, &fdset);
+ /* If we timeout on a select, this will be unset */
+ FD_SET((unsigned)bsock->m_fd, &fdset);
tv.tv_sec = 10;
tv.tv_usec = 0;
/* Block until we can read */
- select(fdmax, &fdset, NULL, &fdset, &tv);
+ select(fdmax, &fdset, NULL, NULL, &tv);
break;
+
case SSL_ERROR_WANT_WRITE:
- /* If we timeout of a select, this will be unset */
- FD_SET((unsigned) bsock->fd, &fdset);
+ /* If we timeout on a select, this will be unset */
+ FD_SET((unsigned)bsock->m_fd, &fdset);
tv.tv_sec = 10;
tv.tv_usec = 0;
/* Block until we can write */
- select(fdmax, NULL, &fdset, &fdset, &tv);
+ select(fdmax, NULL, &fdset, NULL, &tv);
break;
+
+ case SSL_ERROR_ZERO_RETURN:
+ /* TLS connection was cleanly shut down */
+ /* Fall through wanted */
default:
/* Socket Error Occured */
- openssl_post_errors(M_ERROR, _("TLS read/write failure."));
+ openssl_post_errors(bsock->get_jcr(), M_FATAL, _("TLS read/write failure."));
goto cleanup;
}
}
/* Timeout/Termination, let's take what we can get */
- if (bsock->timed_out || bsock->terminated) {
+ if (bsock->is_timed_out() || bsock->is_terminated()) {
goto cleanup;
}
}
cleanup:
/* Restore saved flags */
- bnet_restore_blocking(bsock, flags);
+ bsock->restore_blocking(flags);
/* Clear timer */
bsock->timer_start = 0;
-
return nbytes - nleft;
}
-int tls_bsock_writen(BSOCK *bsock, char *ptr, int32_t nbytes) {
+int tls_bsock_writen(BSOCK *bsock, char *ptr, int32_t nbytes)
+{
/* SSL_write(bsock->tls->openssl, ptr, nbytes) */
- return (openssl_bsock_readwrite(bsock, ptr, nbytes, true));
+ return openssl_bsock_readwrite(bsock, ptr, nbytes, true);
}
-int tls_bsock_readn(BSOCK *bsock, char *ptr, int32_t nbytes) {
+int tls_bsock_readn(BSOCK *bsock, char *ptr, int32_t nbytes)
+{
/* SSL_read(bsock->tls->openssl, ptr, nbytes) */
- return (openssl_bsock_readwrite(bsock, ptr, nbytes, false));
+ return openssl_bsock_readwrite(bsock, ptr, nbytes, false);
}
#else /* HAVE_OPENSSL */
# error No TLS implementation available.
#endif /* !HAVE_OPENSSL */
-#else
+
+#else /* TLS NOT enabled, dummy routines substituted */
+
/* Dummy routines */
TLS_CONTEXT *new_tls_context(const char *ca_certfile, const char *ca_certdir,
}
void free_tls_context(TLS_CONTEXT *ctx) { }
+void tls_bsock_shutdown(BSOCK *bsock) { }
+
+void free_tls_connection(TLS_CONNECTION *tls) { }
+
+bool get_tls_require(TLS_CONTEXT *ctx)
+{
+ return false;
+}
+
+bool get_tls_enable(TLS_CONTEXT *ctx)
+{
+ return false;
+}
+
#endif /* HAVE_TLS */
projects / bacula / bacula / blobdiff