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 Jmsg2(jcr, M_ERROR, 0, "%s: ERR=%s\n", errstring, buf);
84 * Return an OpenSSL thread ID
88 static unsigned long get_openssl_thread_id (void)
90 /* Comparison without use of pthread_equal() is mandated by the OpenSSL API */
91 return ((unsigned long) pthread_self());
95 * Allocate a dynamic OpenSSL mutex
97 static struct CRYPTO_dynlock_value *openssl_create_dynamic_mutex (const char *file, int line)
99 struct CRYPTO_dynlock_value *dynlock;
102 dynlock = (struct CRYPTO_dynlock_value *) malloc(sizeof(struct CRYPTO_dynlock_value));
104 if ((stat = pthread_mutex_init(&dynlock->mutex, NULL)) != 0) {
105 Emsg1(M_ABORT, 0, _("Unable to init mutex: ERR=%s\n"), strerror(stat));
111 static void openssl_update_dynamic_mutex (int mode, struct CRYPTO_dynlock_value *dynlock, const char *file, int line)
113 if (mode & CRYPTO_LOCK) {
120 static void openssl_destroy_dynamic_mutex (struct CRYPTO_dynlock_value *dynlock, const char *file, int line)
124 if ((stat = pthread_mutex_destroy(&dynlock->mutex)) != 0) {
125 Emsg1(M_ABORT, 0, _("Unable to destroy mutex: ERR=%s\n"), strerror(stat));
132 * (Un)Lock a static OpenSSL mutex
134 static void openssl_update_static_mutex (int mode, int i, const char *file, int line)
136 if (mode & CRYPTO_LOCK) {
144 * Initialize OpenSSL thread support
145 * Returns: 0 on success
148 int openssl_init_threads (void)
154 /* Set thread ID callback */
155 CRYPTO_set_id_callback(get_openssl_thread_id);
157 /* Initialize static locking */
158 numlocks = CRYPTO_num_locks();
159 mutexes = (pthread_mutex_t *) malloc(numlocks * sizeof(pthread_mutex_t));
160 for (i = 0; i < numlocks; i++) {
161 if ((stat = pthread_mutex_init(&mutexes[i], NULL)) != 0) {
162 Emsg1(M_ERROR, 0, _("Unable to init mutex: ERR=%s\n"), strerror(stat));
167 /* Set static locking callback */
168 CRYPTO_set_locking_callback(openssl_update_static_mutex);
170 /* Initialize dyanmic locking */
171 CRYPTO_set_dynlock_create_callback(openssl_create_dynamic_mutex);
172 CRYPTO_set_dynlock_lock_callback(openssl_update_dynamic_mutex);
173 CRYPTO_set_dynlock_destroy_callback(openssl_destroy_dynamic_mutex);
179 * Clean up OpenSSL threading support
181 void openssl_cleanup_threads (void)
186 /* Unset thread ID callback */
187 CRYPTO_set_id_callback(NULL);
189 /* Deallocate static lock mutexes */
190 numlocks = CRYPTO_num_locks();
191 for (i = 0; i < numlocks; i++) {
192 if ((stat = pthread_mutex_destroy(&mutexes[i])) != 0) {
193 /* We don't halt execution, reporting the error should be sufficient */
194 Emsg1(M_ERROR, 0, _("Unable to destroy mutex: ERR=%s\n"), strerror(stat));
198 /* Unset static locking callback */
199 CRYPTO_set_locking_callback(NULL);
201 /* Free static lock array */
204 /* Unset dynamic locking callbacks */
205 CRYPTO_set_dynlock_create_callback(NULL);
206 CRYPTO_set_dynlock_lock_callback(NULL);
207 CRYPTO_set_dynlock_destroy_callback(NULL);
213 * Returns: 1 on success
216 int openssl_seed_prng (void)
218 const char *names[] = { "/dev/urandom", "/dev/random", NULL };
223 // Read saved entropy?
225 for (i = 0; names[i]; i++) {
226 if (RAND_load_file(names[i], 1024) != -1) {
237 * Save OpenSSL Entropy
238 * Returns: 1 on success
241 int openssl_save_prng (void)
244 // Implement PRNG state save
248 #endif /* HAVE_OPENSSL */