3 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
6 * tls.c - Handle tls/ssl using SSLeay or OpenSSL.
15 #include <ac/stdlib.h>
17 #include <ac/socket.h>
18 #include <ac/string.h>
20 #include <ac/unistd.h>
25 #include <ldap_pvt_thread.h>
28 #ifdef HAVE_OPENSSL_SSL_H
29 #include <openssl/ssl.h>
30 #include <openssl/x509v3.h>
31 #include <openssl/err.h>
32 #include <openssl/rand.h>
33 #elif defined( HAVE_SSL_H )
37 static int tls_opt_trace = 1;
38 static char *tls_opt_certfile = NULL;
39 static char *tls_opt_keyfile = NULL;
40 static char *tls_opt_cacertfile = NULL;
41 static char *tls_opt_cacertdir = NULL;
42 static int tls_opt_require_cert = 0;
43 static char *tls_opt_ciphersuite = NULL;
44 static char *tls_opt_randfile = NULL;
46 #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
47 (void *)&ldap_pvt_sockbuf_io_tls )
49 static void tls_report_error( void );
51 static void tls_info_cb( SSL *ssl, int where, int ret );
52 static int tls_verify_cb( int ok, X509_STORE_CTX *ctx );
53 static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
54 static STACK_OF(X509_NAME) * get_ca_list( char * bundle, char * dir );
56 #if 0 /* Currently this is not used by anyone */
57 static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
60 static SSL_CTX *tls_def_ctx = NULL;
64 * provide mutexes for the SSLeay library.
66 static ldap_pvt_thread_mutex_t tls_mutexes[CRYPTO_NUM_LOCKS];
68 static void tls_locking_cb( int mode, int type, const char *file, int line )
70 if ( mode & CRYPTO_LOCK ) {
71 ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
73 ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
78 * an extra mutex for the default ctx.
81 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
83 static void tls_init_threads( void )
87 for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
88 ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
90 CRYPTO_set_locking_callback( tls_locking_cb );
91 /* FIXME: the thread id should be added somehow... */
93 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
95 #endif /* LDAP_R_COMPILE */
98 * Initialize tls system. Should be called only once.
101 ldap_pvt_tls_init( void )
103 static int tls_initialized = 0;
105 if ( tls_initialized ) return 0;
107 (void) tls_seed_PRNG( tls_opt_randfile );
110 #ifdef LDAP_R_COMPILE
113 SSL_load_error_strings();
114 SSLeay_add_ssl_algorithms();
115 /* FIXME: mod_ssl does this */
116 X509V3_add_standard_extensions();
121 * initialize the default context
124 ldap_pvt_tls_init_def_ctx( void )
126 STACK_OF(X509_NAME) *calist;
128 #ifdef LDAP_R_COMPILE
129 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
131 if ( tls_def_ctx == NULL ) {
132 tls_def_ctx = SSL_CTX_new( SSLv23_method() );
133 if ( tls_def_ctx == NULL ) {
134 Debug( LDAP_DEBUG_ANY,
135 "TLS: could not allocate default ctx.\n",0,0,0);
138 if ( tls_opt_ciphersuite &&
139 !SSL_CTX_set_cipher_list( tls_def_ctx,
140 tls_opt_ciphersuite ) ) {
141 Debug( LDAP_DEBUG_ANY,
142 "TLS: could not set cipher list %s.\n",
143 tls_opt_ciphersuite, 0, 0 );
147 if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
148 if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
151 || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
153 Debug( LDAP_DEBUG_ANY,
154 "TLS: could not load verify locations (file:`%s',dir:`%s').\n",
155 tls_opt_cacertfile,tls_opt_cacertdir,0);
159 calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
161 Debug( LDAP_DEBUG_ANY,
162 "TLS: could not load client CA list (file:`%s',dir:`%s').\n",
163 tls_opt_cacertfile,tls_opt_cacertdir,0);
167 SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
169 if ( tls_opt_keyfile &&
170 !SSL_CTX_use_PrivateKey_file( tls_def_ctx,
172 SSL_FILETYPE_PEM ) ) {
173 Debug( LDAP_DEBUG_ANY,
174 "TLS: could not use key file `%s'.\n",
175 tls_opt_keyfile,0,0);
179 if ( tls_opt_certfile &&
180 !SSL_CTX_use_certificate_file( tls_def_ctx,
182 SSL_FILETYPE_PEM ) ) {
183 Debug( LDAP_DEBUG_ANY,
184 "TLS: could not use certificate `%s'.\n",
185 tls_opt_certfile,0,0);
189 if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
190 !SSL_CTX_check_private_key( tls_def_ctx ) ) {
191 Debug( LDAP_DEBUG_ANY,
192 "TLS: private key mismatch.\n",
197 if ( tls_opt_trace ) {
198 SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
200 SSL_CTX_set_verify( tls_def_ctx, (tls_opt_require_cert) ?
201 (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
202 SSL_VERIFY_PEER, tls_verify_cb );
203 SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
204 /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
206 #ifdef LDAP_R_COMPILE
207 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
211 if ( tls_def_ctx != NULL ) {
212 SSL_CTX_free( tls_def_ctx );
215 #ifdef LDAP_R_COMPILE
216 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
221 static STACK_OF(X509_NAME) *
222 get_ca_list( char * bundle, char * dir )
224 STACK_OF(X509_NAME) *ca_list = NULL;
227 ca_list = SSL_load_client_CA_file( bundle );
230 * FIXME: We have now to go over all files in dir, load them
231 * and add every certificate there to ca_list.
237 alloc_handle( void *ctx_arg )
243 ctx = (SSL_CTX *) ctx_arg;
245 if ( ldap_pvt_tls_init_def_ctx() < 0 )
250 ssl = SSL_new( ctx );
252 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
256 if ( tls_opt_trace ) {
257 SSL_set_info_callback( ssl, tls_info_cb );
263 update_flags( Sockbuf *sb, SSL * ssl, int rc )
265 int err = SSL_get_error(ssl, rc);
267 sb->sb_trans_needs_read = 0;
268 sb->sb_trans_needs_write = 0;
269 if (err == SSL_ERROR_WANT_READ)
271 sb->sb_trans_needs_read = 1;
273 } else if (err == SSL_ERROR_WANT_WRITE)
275 sb->sb_trans_needs_write = 1;
277 } else if (err == SSL_ERROR_WANT_CONNECT)
285 * TLS support for LBER Sockbufs
290 Sockbuf_IO_Desc *sbiod;
293 extern BIO_METHOD ldap_pvt_sb_bio_method;
296 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
301 assert( sbiod != NULL );
303 p = LBER_MALLOC( sizeof( *p ) );
309 bio = BIO_new( &ldap_pvt_sb_bio_method );
310 bio->ptr = (void *)p;
311 SSL_set_bio( p->ssl, bio, bio );
312 sbiod->sbiod_pvt = p;
317 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
321 assert( sbiod != NULL );
322 assert( sbiod->sbiod_pvt != NULL );
324 p = (struct tls_data *)sbiod->sbiod_pvt;
326 LBER_FREE( sbiod->sbiod_pvt );
327 sbiod->sbiod_pvt = NULL;
332 sb_tls_close( Sockbuf_IO_Desc *sbiod )
336 assert( sbiod != NULL );
337 assert( sbiod->sbiod_pvt != NULL );
339 p = (struct tls_data *)sbiod->sbiod_pvt;
340 SSL_shutdown( p->ssl );
345 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
349 assert( sbiod != NULL );
350 assert( sbiod->sbiod_pvt != NULL );
352 p = (struct tls_data *)sbiod->sbiod_pvt;
354 if ( opt == LBER_SB_OPT_GET_SSL ) {
355 *((SSL **)arg) = p->ssl;
359 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
363 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
369 assert( sbiod != NULL );
370 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
372 p = (struct tls_data *)sbiod->sbiod_pvt;
374 ret = SSL_read( p->ssl, (char *)buf, len );
376 errno = WSAGetLastError();
378 err = SSL_get_error( p->ssl, ret );
379 if (err == SSL_ERROR_WANT_READ ) {
380 sbiod->sbiod_sb->sb_trans_needs_read = 1;
386 sbiod->sbiod_sb->sb_trans_needs_read = 0;
391 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
397 assert( sbiod != NULL );
398 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
400 p = (struct tls_data *)sbiod->sbiod_pvt;
402 ret = SSL_write( p->ssl, (char *)buf, len );
404 errno = WSAGetLastError();
406 err = SSL_get_error( p->ssl, ret );
407 if (err == SSL_ERROR_WANT_WRITE ) {
408 sbiod->sbiod_sb->sb_trans_needs_write = 1;
414 sbiod->sbiod_sb->sb_trans_needs_write = 0;
418 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
420 sb_tls_setup, /* sbi_setup */
421 sb_tls_remove, /* sbi_remove */
422 sb_tls_ctrl, /* sbi_ctrl */
423 sb_tls_read, /* sbi_read */
424 sb_tls_write, /* sbi_write */
425 sb_tls_close /* sbi_close */
429 sb_tls_bio_create( BIO *b ) {
438 sb_tls_bio_destroy( BIO *b )
443 b->ptr = NULL; /* sb_tls_remove() will free it */
450 sb_tls_bio_read( BIO *b, char *buf, int len )
455 if ( buf == NULL || len <= 0 )
458 p = (struct tls_data *)b->ptr;
460 if ( p == NULL || p->sbiod == NULL )
463 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
465 BIO_clear_retry_flags( b );
466 if ( ret < 0 && errno == EWOULDBLOCK )
467 BIO_set_retry_read( b );
473 sb_tls_bio_write( BIO *b, char *buf, int len )
478 if ( buf == NULL || len <= 0 )
481 p = (struct tls_data *)b->ptr;
483 if ( p == NULL || p->sbiod == NULL )
486 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, buf, len );
488 BIO_clear_retry_flags( b );
489 if ( ret < 0 && errno == EWOULDBLOCK )
490 BIO_set_retry_write( b );
496 sb_tls_bio_ctrl( BIO *b, int cmd, long num, char *ptr )
498 if ( cmd == BIO_CTRL_FLUSH ) {
499 /* The OpenSSL library needs this */
506 sb_tls_bio_gets( BIO *b, char *buf, int len )
512 sb_tls_bio_puts( BIO *b, char *str )
514 return sb_tls_bio_write( b, str, strlen( str ) );
517 BIO_METHOD ldap_pvt_sb_bio_method =
519 ( 100 | 0x400 ), /* it's a source/sink BIO */
531 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
532 * a SSL_CTX * or NULL, in which case the default ctx is used.
536 * 0 - Success. Connection is ready for communication.
537 * <0 - Error. Can't create a TLS stream.
538 * >0 - Partial success.
539 * Do a select (using information from lber_pvt_sb_needs_{read,write}
544 ldap_pvt_tls_connect( LDAP *ld, Sockbuf *sb, void *ctx_arg )
549 if ( HAS_TLS( sb ) ) {
550 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
552 ssl = alloc_handle( ctx_arg );
556 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
557 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
559 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
560 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
563 err = SSL_connect( ssl );
566 errno = WSAGetLastError();
569 if ( update_flags( sb, ssl, err ))
571 if ((err = ERR_peek_error())) {
573 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
575 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
576 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
577 LBER_SBIOD_LEVEL_TRANSPORT );
579 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
580 LBER_SBIOD_LEVEL_TRANSPORT );
588 * Call this to do a TLS accept on a sockbuf.
589 * Everything else is the same as with tls_connect.
592 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
597 if ( HAS_TLS( sb ) ) {
598 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
600 ssl = alloc_handle( ctx_arg );
604 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
605 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
607 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
608 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
611 err = SSL_accept( ssl );
614 errno = WSAGetLastError();
617 if ( update_flags( sb, ssl, err ))
619 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
621 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
622 LBER_SBIOD_LEVEL_TRANSPORT );
624 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
625 LBER_SBIOD_LEVEL_TRANSPORT );
633 ldap_pvt_tls_inplace ( Sockbuf *sb )
641 ldap_pvt_tls_sb_handle( Sockbuf *sb )
646 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
653 ldap_pvt_tls_get_handle( LDAP *ld )
655 return ldap_pvt_tls_sb_handle( ld->ld_sb );
659 ldap_pvt_tls_get_peer( LDAP *ld )
665 ldap_pvt_tls_get_peer_issuer( LDAP *ld )
671 ldap_pvt_tls_config( struct ldapoptions *lo, int option, const char *arg )
676 case LDAP_OPT_X_TLS_CACERTFILE:
677 case LDAP_OPT_X_TLS_CACERTDIR:
678 case LDAP_OPT_X_TLS_CERTFILE:
679 case LDAP_OPT_X_TLS_KEYFILE:
680 case LDAP_OPT_X_TLS_RANDOM_FILE:
681 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
682 case LDAP_OPT_X_TLS_REQUIRE_CERT:
683 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
684 ( strcasecmp( arg, "yes" ) == 0) ||
685 ( strcasecmp( arg, "true" ) == 0 ) );
686 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
689 if ( strcasecmp( arg, "never" ) == 0 )
690 i = LDAP_OPT_X_TLS_NEVER ;
691 if ( strcasecmp( arg, "demand" ) == 0 )
692 i = LDAP_OPT_X_TLS_DEMAND ;
693 if ( strcasecmp( arg, "allow" ) == 0 )
694 i = LDAP_OPT_X_TLS_ALLOW ;
695 if ( strcasecmp( arg, "try" ) == 0 )
696 i = LDAP_OPT_X_TLS_TRY ;
697 if ( strcasecmp( arg, "hard" ) == 0 )
698 i = LDAP_OPT_X_TLS_HARD ;
700 return ldap_pvt_tls_set_option( lo, option, &i );
708 ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
712 *(int *)arg = lo->ldo_tls_mode;
714 case LDAP_OPT_X_TLS_CERT:
716 *(void **)arg = (void *) tls_def_ctx;
718 *(void **)arg = lo->ldo_tls_ctx;
720 case LDAP_OPT_X_TLS_CACERTFILE:
721 *(char **)arg = tls_opt_cacertfile ?
722 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
724 case LDAP_OPT_X_TLS_CACERTDIR:
725 *(char **)arg = tls_opt_cacertdir ?
726 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
728 case LDAP_OPT_X_TLS_CERTFILE:
729 *(char **)arg = tls_opt_certfile ?
730 LDAP_STRDUP( tls_opt_certfile ) : NULL;
732 case LDAP_OPT_X_TLS_KEYFILE:
733 *(char **)arg = tls_opt_keyfile ?
734 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
736 case LDAP_OPT_X_TLS_REQUIRE_CERT:
737 *(int *)arg = tls_opt_require_cert;
739 case LDAP_OPT_X_TLS_RANDOM_FILE:
740 *(char **)arg = tls_opt_randfile;
749 ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
753 switch( *(int *) arg ) {
754 case LDAP_OPT_X_TLS_NEVER:
755 case LDAP_OPT_X_TLS_DEMAND:
756 case LDAP_OPT_X_TLS_ALLOW:
757 case LDAP_OPT_X_TLS_TRY:
758 case LDAP_OPT_X_TLS_HARD:
760 lo->ldo_tls_mode = *(int *)arg;
767 case LDAP_OPT_X_TLS_CERT:
769 tls_def_ctx = (SSL_CTX *) arg;
772 lo->ldo_tls_ctx = arg;
782 case LDAP_OPT_X_TLS_CACERTFILE:
783 if ( tls_opt_cacertfile ) free( tls_opt_cacertfile );
784 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
786 case LDAP_OPT_X_TLS_CACERTDIR:
787 if ( tls_opt_cacertdir ) free( tls_opt_cacertdir );
788 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
790 case LDAP_OPT_X_TLS_CERTFILE:
791 if ( tls_opt_certfile ) free( tls_opt_certfile );
792 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
794 case LDAP_OPT_X_TLS_KEYFILE:
795 if ( tls_opt_keyfile ) free( tls_opt_keyfile );
796 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
798 case LDAP_OPT_X_TLS_REQUIRE_CERT:
799 tls_opt_require_cert = * (int *) arg;
801 case LDAP_OPT_X_TLS_CIPHER_SUITE:
802 if ( tls_opt_ciphersuite ) free( tls_opt_ciphersuite );
803 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
805 case LDAP_OPT_X_TLS_RANDOM_FILE:
806 if (tls_opt_randfile ) free (tls_opt_randfile );
807 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
816 ldap_pvt_tls_start ( LDAP *ld, Sockbuf *sb, void *ctx_arg )
818 /* Make sure tls is initialized, including PRNG properly seeded. */
822 * Fortunately, the lib uses blocking io...
824 if ( ldap_pvt_tls_connect( ld, sb, ctx_arg ) < 0 ) {
825 return LDAP_CONNECT_ERROR;
828 /* FIXME: hostname of server must be compared with name in
835 /* Derived from openssl/apps/s_cb.c */
837 tls_info_cb( SSL *ssl, int where, int ret )
842 w = where & ~SSL_ST_MASK;
843 if ( w & SSL_ST_CONNECT ) {
845 } else if ( w & SSL_ST_ACCEPT ) {
851 if ( where & SSL_CB_LOOP ) {
852 Debug( LDAP_DEBUG_TRACE,
853 "TLS trace: %s:%s\n",
854 op, SSL_state_string_long( ssl ), 0 );
855 } else if ( where & SSL_CB_ALERT ) {
856 op = ( where & SSL_CB_READ ) ? "read" : "write";
857 Debug( LDAP_DEBUG_TRACE,
858 "TLS trace: SSL3 alert %s:%s:%s\n",
860 SSL_alert_type_string_long( ret ),
861 SSL_alert_desc_string_long( ret) );
862 } else if ( where & SSL_CB_EXIT ) {
864 Debug( LDAP_DEBUG_TRACE,
865 "TLS trace: %s:failed in %s\n",
866 op, SSL_state_string_long( ssl ), 0 );
867 } else if ( ret < 0 ) {
868 Debug( LDAP_DEBUG_TRACE,
869 "TLS trace: %s:error in %s\n",
870 op, SSL_state_string_long( ssl ), 0 );
876 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
886 cert = X509_STORE_CTX_get_current_cert( ctx );
887 errnum = X509_STORE_CTX_get_error( ctx );
888 errdepth = X509_STORE_CTX_get_error_depth( ctx );
891 * X509_get_*_name return pointers to the internal copies of
892 * those things requested. So do not free them.
894 subject = X509_get_subject_name( cert );
895 issuer = X509_get_issuer_name( cert );
896 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
897 sname = X509_NAME_oneline( subject, NULL, 0 );
898 iname = X509_NAME_oneline( issuer, NULL, 0 );
899 Debug( LDAP_DEBUG_TRACE,
900 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
902 sname ? sname : "-unknown-",
903 iname ? iname : "-unknown-" );
905 CRYPTO_free ( sname );
907 CRYPTO_free ( iname );
912 /* Inspired by ERR_print_errors in OpenSSL */
914 tls_report_error( void )
921 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
922 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
923 ERR_error_string( l, buf ), file, line );
928 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
932 /* FIXME: Pregenerate the key on startup */
933 /* FIXME: Who frees the key? */
934 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
937 Debug( LDAP_DEBUG_ANY,
938 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
939 key_length, is_export ? "export" : "domestic", 0 );
946 tls_seed_PRNG( const char *randfile )
948 #ifndef URANDOM_DEVICE
949 /* no /dev/urandom (or equiv) */
952 static int egdsocket = 0;
954 if (randfile == NULL) {
955 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
956 * If $HOME is not set or buffer too small to hold the pathname,
957 * an error occurs. - From RAND_file_name() man page.
958 * The fact is that when $HOME is NULL, .rnd is used.
960 randfile = RAND_file_name(buffer, sizeof( buffer ));
962 } else if (RAND_egd(randfile) > 0) {
968 if (randfile == NULL) {
969 Debug( LDAP_DEBUG_ANY,
970 "TLS: Use configuration file or $RANDFILE to define seed file",
975 RAND_load_file(randfile, -1);
977 if (RAND_status() == 0) {
978 Debug( LDAP_DEBUG_ANY,
979 "TLS: PRNG has not been seeded with enough data",
990 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )