2 Bacula® - The Network Backup Solution
4 Copyright (C) 2005-2007 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation plus additions
11 that are listed in the file LICENSE.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of John Walker.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * openssl.c OpenSSL support functions
31 * Author: Landon Fuller <landonf@opendarwin.org>
35 * This file was contributed to the Bacula project by Landon Fuller.
37 * Landon Fuller has been granted a perpetual, worldwide, non-exclusive,
38 * no-charge, royalty-free, irrevocable copyright license to reproduce,
39 * prepare derivative works of, publicly display, publicly perform,
40 * sublicense, and distribute the original work contributed by Landon Fuller
41 * to the Bacula project in source or object form.
43 * If you wish to license these contributions under an alternate open source
44 * license please contact Landon Fuller <landonf@opendarwin.org>.
53 /* Array of mutexes for use with OpenSSL static locking */
54 static pthread_mutex_t *mutexes;
56 /* OpenSSL dynamic locking structure */
57 struct CRYPTO_dynlock_value {
58 pthread_mutex_t mutex;
61 void openssl_post_errors(int code, const char *errstring)
63 openssl_post_errors(NULL, code, errstring);
68 * Post all per-thread openssl errors
70 void openssl_post_errors(JCR *jcr, int code, const char *errstring)
75 /* Pop errors off of the per-thread queue */
76 while((sslerr = ERR_get_error()) != 0) {
77 /* Acquire the human readable string */
78 ERR_error_string_n(sslerr, (char *) &buf, sizeof(buf));
79 Dmsg3(100, "jcr=%p %s: ERR=%s\n", jcr, errstring, buf);
80 Jmsg2(jcr, M_ERROR, 0, "%s: ERR=%s\n", errstring, buf);
85 * Return an OpenSSL thread ID
89 static unsigned long get_openssl_thread_id (void)
91 /* Comparison without use of pthread_equal() is mandated by the OpenSSL API */
92 return ((unsigned long) pthread_self());
96 * Allocate a dynamic OpenSSL mutex
98 static struct CRYPTO_dynlock_value *openssl_create_dynamic_mutex (const char *file, int line)
100 struct CRYPTO_dynlock_value *dynlock;
103 dynlock = (struct CRYPTO_dynlock_value *) malloc(sizeof(struct CRYPTO_dynlock_value));
105 if ((stat = pthread_mutex_init(&dynlock->mutex, NULL)) != 0) {
106 Emsg1(M_ABORT, 0, _("Unable to init mutex: ERR=%s\n"), strerror(stat));
112 static void openssl_update_dynamic_mutex (int mode, struct CRYPTO_dynlock_value *dynlock, const char *file, int line)
114 if (mode & CRYPTO_LOCK) {
121 static void openssl_destroy_dynamic_mutex (struct CRYPTO_dynlock_value *dynlock, const char *file, int line)
125 if ((stat = pthread_mutex_destroy(&dynlock->mutex)) != 0) {
126 Emsg1(M_ABORT, 0, _("Unable to destroy mutex: ERR=%s\n"), strerror(stat));
133 * (Un)Lock a static OpenSSL mutex
135 static void openssl_update_static_mutex (int mode, int i, const char *file, int line)
137 if (mode & CRYPTO_LOCK) {
145 * Initialize OpenSSL thread support
146 * Returns: 0 on success
149 int openssl_init_threads (void)
155 /* Set thread ID callback */
156 CRYPTO_set_id_callback(get_openssl_thread_id);
158 /* Initialize static locking */
159 numlocks = CRYPTO_num_locks();
160 mutexes = (pthread_mutex_t *) malloc(numlocks * sizeof(pthread_mutex_t));
161 for (i = 0; i < numlocks; i++) {
162 if ((stat = pthread_mutex_init(&mutexes[i], NULL)) != 0) {
163 Emsg1(M_ERROR, 0, _("Unable to init mutex: ERR=%s\n"), strerror(stat));
168 /* Set static locking callback */
169 CRYPTO_set_locking_callback(openssl_update_static_mutex);
171 /* Initialize dyanmic locking */
172 CRYPTO_set_dynlock_create_callback(openssl_create_dynamic_mutex);
173 CRYPTO_set_dynlock_lock_callback(openssl_update_dynamic_mutex);
174 CRYPTO_set_dynlock_destroy_callback(openssl_destroy_dynamic_mutex);
180 * Clean up OpenSSL threading support
182 void openssl_cleanup_threads (void)
187 /* Unset thread ID callback */
188 CRYPTO_set_id_callback(NULL);
190 /* Deallocate static lock mutexes */
191 numlocks = CRYPTO_num_locks();
192 for (i = 0; i < numlocks; i++) {
193 if ((stat = pthread_mutex_destroy(&mutexes[i])) != 0) {
194 /* We don't halt execution, reporting the error should be sufficient */
195 Emsg1(M_ERROR, 0, _("Unable to destroy mutex: ERR=%s\n"), strerror(stat));
199 /* Unset static locking callback */
200 CRYPTO_set_locking_callback(NULL);
202 /* Free static lock array */
205 /* Unset dynamic locking callbacks */
206 CRYPTO_set_dynlock_create_callback(NULL);
207 CRYPTO_set_dynlock_lock_callback(NULL);
208 CRYPTO_set_dynlock_destroy_callback(NULL);
214 * Returns: 1 on success
217 int openssl_seed_prng (void)
219 const char *names[] = { "/dev/urandom", "/dev/random", NULL };
224 // Read saved entropy?
226 for (i = 0; names[i]; i++) {
227 if (RAND_load_file(names[i], 1024) != -1) {
238 * Save OpenSSL Entropy
239 * Returns: 1 on success
242 int openssl_save_prng (void)
245 // Implement PRNG state save
249 #endif /* HAVE_OPENSSL */