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;
62 static int tls_seed_PRNG( const char *randfile );
66 * provide mutexes for the SSLeay library.
68 static ldap_pvt_thread_mutex_t tls_mutexes[CRYPTO_NUM_LOCKS];
70 static void tls_locking_cb( int mode, int type, const char *file, int line )
72 if ( mode & CRYPTO_LOCK ) {
73 ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
75 ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
80 * an extra mutex for the default ctx.
83 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
85 static void tls_init_threads( void )
89 for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
90 ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
92 CRYPTO_set_locking_callback( tls_locking_cb );
93 /* FIXME: the thread id should be added somehow... */
95 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
97 #endif /* LDAP_R_COMPILE */
100 * Initialize tls system. Should be called only once.
103 ldap_pvt_tls_init( void )
105 static int tls_initialized = 0;
107 if ( tls_initialized ) return 0;
109 (void) tls_seed_PRNG( tls_opt_randfile );
112 #ifdef LDAP_R_COMPILE
115 SSL_load_error_strings();
116 SSLeay_add_ssl_algorithms();
117 /* FIXME: mod_ssl does this */
118 X509V3_add_standard_extensions();
123 * initialize the default context
126 ldap_pvt_tls_init_def_ctx( void )
128 STACK_OF(X509_NAME) *calist;
130 #ifdef LDAP_R_COMPILE
131 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
133 if ( tls_def_ctx == NULL ) {
134 tls_def_ctx = SSL_CTX_new( SSLv23_method() );
135 if ( tls_def_ctx == NULL ) {
136 Debug( LDAP_DEBUG_ANY,
137 "TLS: could not allocate default ctx.\n",0,0,0);
140 if ( tls_opt_ciphersuite &&
141 !SSL_CTX_set_cipher_list( tls_def_ctx,
142 tls_opt_ciphersuite ) ) {
143 Debug( LDAP_DEBUG_ANY,
144 "TLS: could not set cipher list %s.\n",
145 tls_opt_ciphersuite, 0, 0 );
149 if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
150 if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
153 || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
155 Debug( LDAP_DEBUG_ANY,
156 "TLS: could not load verify locations (file:`%s',dir:`%s').\n",
157 tls_opt_cacertfile,tls_opt_cacertdir,0);
161 calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
163 Debug( LDAP_DEBUG_ANY,
164 "TLS: could not load client CA list (file:`%s',dir:`%s').\n",
165 tls_opt_cacertfile,tls_opt_cacertdir,0);
169 SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
171 if ( tls_opt_keyfile &&
172 !SSL_CTX_use_PrivateKey_file( tls_def_ctx,
174 SSL_FILETYPE_PEM ) ) {
175 Debug( LDAP_DEBUG_ANY,
176 "TLS: could not use key file `%s'.\n",
177 tls_opt_keyfile,0,0);
181 if ( tls_opt_certfile &&
182 !SSL_CTX_use_certificate_file( tls_def_ctx,
184 SSL_FILETYPE_PEM ) ) {
185 Debug( LDAP_DEBUG_ANY,
186 "TLS: could not use certificate `%s'.\n",
187 tls_opt_certfile,0,0);
191 if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
192 !SSL_CTX_check_private_key( tls_def_ctx ) ) {
193 Debug( LDAP_DEBUG_ANY,
194 "TLS: private key mismatch.\n",
199 if ( tls_opt_trace ) {
200 SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
202 SSL_CTX_set_verify( tls_def_ctx, (tls_opt_require_cert) ?
203 (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
204 SSL_VERIFY_PEER, tls_verify_cb );
205 SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
206 /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
208 #ifdef LDAP_R_COMPILE
209 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
213 if ( tls_def_ctx != NULL ) {
214 SSL_CTX_free( tls_def_ctx );
217 #ifdef LDAP_R_COMPILE
218 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
223 static STACK_OF(X509_NAME) *
224 get_ca_list( char * bundle, char * dir )
226 STACK_OF(X509_NAME) *ca_list = NULL;
229 ca_list = SSL_load_client_CA_file( bundle );
232 * FIXME: We have now to go over all files in dir, load them
233 * and add every certificate there to ca_list.
239 alloc_handle( void *ctx_arg )
245 ctx = (SSL_CTX *) ctx_arg;
247 if ( ldap_pvt_tls_init_def_ctx() < 0 )
252 ssl = SSL_new( ctx );
254 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
258 if ( tls_opt_trace ) {
259 SSL_set_info_callback( ssl, tls_info_cb );
265 update_flags( Sockbuf *sb, SSL * ssl, int rc )
267 int err = SSL_get_error(ssl, rc);
269 sb->sb_trans_needs_read = 0;
270 sb->sb_trans_needs_write = 0;
271 if (err == SSL_ERROR_WANT_READ)
273 sb->sb_trans_needs_read = 1;
275 } else if (err == SSL_ERROR_WANT_WRITE)
277 sb->sb_trans_needs_write = 1;
279 } else if (err == SSL_ERROR_WANT_CONNECT)
287 * TLS support for LBER Sockbufs
292 Sockbuf_IO_Desc *sbiod;
295 extern BIO_METHOD ldap_pvt_sb_bio_method;
298 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
303 assert( sbiod != NULL );
305 p = LBER_MALLOC( sizeof( *p ) );
311 bio = BIO_new( &ldap_pvt_sb_bio_method );
312 bio->ptr = (void *)p;
313 SSL_set_bio( p->ssl, bio, bio );
314 sbiod->sbiod_pvt = p;
319 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
323 assert( sbiod != NULL );
324 assert( sbiod->sbiod_pvt != NULL );
326 p = (struct tls_data *)sbiod->sbiod_pvt;
328 LBER_FREE( sbiod->sbiod_pvt );
329 sbiod->sbiod_pvt = NULL;
334 sb_tls_close( Sockbuf_IO_Desc *sbiod )
338 assert( sbiod != NULL );
339 assert( sbiod->sbiod_pvt != NULL );
341 p = (struct tls_data *)sbiod->sbiod_pvt;
342 SSL_shutdown( p->ssl );
347 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
351 assert( sbiod != NULL );
352 assert( sbiod->sbiod_pvt != NULL );
354 p = (struct tls_data *)sbiod->sbiod_pvt;
356 if ( opt == LBER_SB_OPT_GET_SSL ) {
357 *((SSL **)arg) = p->ssl;
361 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
365 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
371 assert( sbiod != NULL );
372 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
374 p = (struct tls_data *)sbiod->sbiod_pvt;
376 ret = SSL_read( p->ssl, (char *)buf, len );
378 errno = WSAGetLastError();
380 err = SSL_get_error( p->ssl, ret );
381 if (err == SSL_ERROR_WANT_READ ) {
382 sbiod->sbiod_sb->sb_trans_needs_read = 1;
388 sbiod->sbiod_sb->sb_trans_needs_read = 0;
393 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
399 assert( sbiod != NULL );
400 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
402 p = (struct tls_data *)sbiod->sbiod_pvt;
404 ret = SSL_write( p->ssl, (char *)buf, len );
406 errno = WSAGetLastError();
408 err = SSL_get_error( p->ssl, ret );
409 if (err == SSL_ERROR_WANT_WRITE ) {
410 sbiod->sbiod_sb->sb_trans_needs_write = 1;
416 sbiod->sbiod_sb->sb_trans_needs_write = 0;
420 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
422 sb_tls_setup, /* sbi_setup */
423 sb_tls_remove, /* sbi_remove */
424 sb_tls_ctrl, /* sbi_ctrl */
425 sb_tls_read, /* sbi_read */
426 sb_tls_write, /* sbi_write */
427 sb_tls_close /* sbi_close */
431 sb_tls_bio_create( BIO *b ) {
440 sb_tls_bio_destroy( BIO *b )
445 b->ptr = NULL; /* sb_tls_remove() will free it */
452 sb_tls_bio_read( BIO *b, char *buf, int len )
457 if ( buf == NULL || len <= 0 )
460 p = (struct tls_data *)b->ptr;
462 if ( p == NULL || p->sbiod == NULL )
465 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
467 BIO_clear_retry_flags( b );
468 if ( ret < 0 && errno == EWOULDBLOCK )
469 BIO_set_retry_read( b );
475 sb_tls_bio_write( BIO *b, char *buf, int len )
480 if ( buf == NULL || len <= 0 )
483 p = (struct tls_data *)b->ptr;
485 if ( p == NULL || p->sbiod == NULL )
488 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, buf, len );
490 BIO_clear_retry_flags( b );
491 if ( ret < 0 && errno == EWOULDBLOCK )
492 BIO_set_retry_write( b );
498 sb_tls_bio_ctrl( BIO *b, int cmd, long num, char *ptr )
500 if ( cmd == BIO_CTRL_FLUSH ) {
501 /* The OpenSSL library needs this */
508 sb_tls_bio_gets( BIO *b, char *buf, int len )
514 sb_tls_bio_puts( BIO *b, char *str )
516 return sb_tls_bio_write( b, str, strlen( str ) );
519 BIO_METHOD ldap_pvt_sb_bio_method =
521 ( 100 | 0x400 ), /* it's a source/sink BIO */
533 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
534 * a SSL_CTX * or NULL, in which case the default ctx is used.
538 * 0 - Success. Connection is ready for communication.
539 * <0 - Error. Can't create a TLS stream.
540 * >0 - Partial success.
541 * Do a select (using information from lber_pvt_sb_needs_{read,write}
546 ldap_pvt_tls_connect( LDAP *ld, Sockbuf *sb, void *ctx_arg )
551 if ( HAS_TLS( sb ) ) {
552 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
554 ssl = alloc_handle( ctx_arg );
558 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
559 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
561 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
562 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
565 err = SSL_connect( ssl );
568 errno = WSAGetLastError();
571 if ( update_flags( sb, ssl, err ))
573 if ((err = ERR_peek_error())) {
575 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
577 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
578 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
579 LBER_SBIOD_LEVEL_TRANSPORT );
581 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
582 LBER_SBIOD_LEVEL_TRANSPORT );
590 * Call this to do a TLS accept on a sockbuf.
591 * Everything else is the same as with tls_connect.
594 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
599 if ( HAS_TLS( sb ) ) {
600 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
602 ssl = alloc_handle( ctx_arg );
606 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
607 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
609 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
610 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
613 err = SSL_accept( ssl );
616 errno = WSAGetLastError();
619 if ( update_flags( sb, ssl, err ))
621 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
623 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
624 LBER_SBIOD_LEVEL_TRANSPORT );
626 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
627 LBER_SBIOD_LEVEL_TRANSPORT );
636 ldap_pvt_tls_inplace ( Sockbuf *sb )
644 ldap_pvt_tls_sb_handle( Sockbuf *sb )
649 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
656 ldap_pvt_tls_get_handle( LDAP *ld )
658 return ldap_pvt_tls_sb_handle( ld->ld_sb );
662 ldap_pvt_tls_get_peer( LDAP *ld )
668 ldap_pvt_tls_get_peer_issuer( LDAP *ld )
674 ldap_int_tls_config( struct ldapoptions *lo, int option, const char *arg )
679 case LDAP_OPT_X_TLS_CACERTFILE:
680 case LDAP_OPT_X_TLS_CACERTDIR:
681 case LDAP_OPT_X_TLS_CERTFILE:
682 case LDAP_OPT_X_TLS_KEYFILE:
683 case LDAP_OPT_X_TLS_RANDOM_FILE:
684 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
685 case LDAP_OPT_X_TLS_REQUIRE_CERT:
686 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
687 ( strcasecmp( arg, "yes" ) == 0) ||
688 ( strcasecmp( arg, "true" ) == 0 ) );
689 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
692 if ( strcasecmp( arg, "never" ) == 0 )
693 i = LDAP_OPT_X_TLS_NEVER ;
694 if ( strcasecmp( arg, "demand" ) == 0 )
695 i = LDAP_OPT_X_TLS_DEMAND ;
696 if ( strcasecmp( arg, "allow" ) == 0 )
697 i = LDAP_OPT_X_TLS_ALLOW ;
698 if ( strcasecmp( arg, "try" ) == 0 )
699 i = LDAP_OPT_X_TLS_TRY ;
700 if ( strcasecmp( arg, "hard" ) == 0 )
701 i = LDAP_OPT_X_TLS_HARD ;
703 return ldap_pvt_tls_set_option( lo, option, &i );
711 ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
715 *(int *)arg = lo->ldo_tls_mode;
717 case LDAP_OPT_X_TLS_CERT:
719 *(void **)arg = (void *) tls_def_ctx;
721 *(void **)arg = lo->ldo_tls_ctx;
723 case LDAP_OPT_X_TLS_CACERTFILE:
724 *(char **)arg = tls_opt_cacertfile ?
725 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
727 case LDAP_OPT_X_TLS_CACERTDIR:
728 *(char **)arg = tls_opt_cacertdir ?
729 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
731 case LDAP_OPT_X_TLS_CERTFILE:
732 *(char **)arg = tls_opt_certfile ?
733 LDAP_STRDUP( tls_opt_certfile ) : NULL;
735 case LDAP_OPT_X_TLS_KEYFILE:
736 *(char **)arg = tls_opt_keyfile ?
737 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
739 case LDAP_OPT_X_TLS_REQUIRE_CERT:
740 *(int *)arg = tls_opt_require_cert;
742 case LDAP_OPT_X_TLS_RANDOM_FILE:
743 *(char **)arg = tls_opt_randfile;
752 ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
756 switch( *(int *) arg ) {
757 case LDAP_OPT_X_TLS_NEVER:
758 case LDAP_OPT_X_TLS_DEMAND:
759 case LDAP_OPT_X_TLS_ALLOW:
760 case LDAP_OPT_X_TLS_TRY:
761 case LDAP_OPT_X_TLS_HARD:
763 lo->ldo_tls_mode = *(int *)arg;
770 case LDAP_OPT_X_TLS_CERT:
772 tls_def_ctx = (SSL_CTX *) arg;
775 lo->ldo_tls_ctx = arg;
785 case LDAP_OPT_X_TLS_CACERTFILE:
786 if ( tls_opt_cacertfile ) free( tls_opt_cacertfile );
787 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
789 case LDAP_OPT_X_TLS_CACERTDIR:
790 if ( tls_opt_cacertdir ) free( tls_opt_cacertdir );
791 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
793 case LDAP_OPT_X_TLS_CERTFILE:
794 if ( tls_opt_certfile ) free( tls_opt_certfile );
795 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
797 case LDAP_OPT_X_TLS_KEYFILE:
798 if ( tls_opt_keyfile ) free( tls_opt_keyfile );
799 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
801 case LDAP_OPT_X_TLS_REQUIRE_CERT:
802 tls_opt_require_cert = * (int *) arg;
804 case LDAP_OPT_X_TLS_CIPHER_SUITE:
805 if ( tls_opt_ciphersuite ) free( tls_opt_ciphersuite );
806 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
808 case LDAP_OPT_X_TLS_RANDOM_FILE:
809 if (tls_opt_randfile ) free (tls_opt_randfile );
810 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
819 ldap_pvt_tls_start ( LDAP *ld, Sockbuf *sb, void *ctx_arg )
821 /* Make sure tls is initialized, including PRNG properly seeded. */
825 * Fortunately, the lib uses blocking io...
827 if ( ldap_pvt_tls_connect( ld, sb, ctx_arg ) < 0 ) {
828 return LDAP_CONNECT_ERROR;
831 /* FIXME: hostname of server must be compared with name in
838 /* Derived from openssl/apps/s_cb.c */
840 tls_info_cb( SSL *ssl, int where, int ret )
845 w = where & ~SSL_ST_MASK;
846 if ( w & SSL_ST_CONNECT ) {
848 } else if ( w & SSL_ST_ACCEPT ) {
854 if ( where & SSL_CB_LOOP ) {
855 Debug( LDAP_DEBUG_TRACE,
856 "TLS trace: %s:%s\n",
857 op, SSL_state_string_long( ssl ), 0 );
858 } else if ( where & SSL_CB_ALERT ) {
859 op = ( where & SSL_CB_READ ) ? "read" : "write";
860 Debug( LDAP_DEBUG_TRACE,
861 "TLS trace: SSL3 alert %s:%s:%s\n",
863 SSL_alert_type_string_long( ret ),
864 SSL_alert_desc_string_long( ret) );
865 } else if ( where & SSL_CB_EXIT ) {
867 Debug( LDAP_DEBUG_TRACE,
868 "TLS trace: %s:failed in %s\n",
869 op, SSL_state_string_long( ssl ), 0 );
870 } else if ( ret < 0 ) {
871 Debug( LDAP_DEBUG_TRACE,
872 "TLS trace: %s:error in %s\n",
873 op, SSL_state_string_long( ssl ), 0 );
879 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
889 cert = X509_STORE_CTX_get_current_cert( ctx );
890 errnum = X509_STORE_CTX_get_error( ctx );
891 errdepth = X509_STORE_CTX_get_error_depth( ctx );
894 * X509_get_*_name return pointers to the internal copies of
895 * those things requested. So do not free them.
897 subject = X509_get_subject_name( cert );
898 issuer = X509_get_issuer_name( cert );
899 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
900 sname = X509_NAME_oneline( subject, NULL, 0 );
901 iname = X509_NAME_oneline( issuer, NULL, 0 );
902 Debug( LDAP_DEBUG_TRACE,
903 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
905 sname ? sname : "-unknown-",
906 iname ? iname : "-unknown-" );
908 CRYPTO_free ( sname );
910 CRYPTO_free ( iname );
915 /* Inspired by ERR_print_errors in OpenSSL */
917 tls_report_error( void )
924 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
925 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
926 ERR_error_string( l, buf ), file, line );
931 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
935 /* FIXME: Pregenerate the key on startup */
936 /* FIXME: Who frees the key? */
937 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
940 Debug( LDAP_DEBUG_ANY,
941 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
942 key_length, is_export ? "export" : "domestic", 0 );
949 tls_seed_PRNG( const char *randfile )
951 #ifndef URANDOM_DEVICE
952 /* no /dev/urandom (or equiv) */
955 static int egdsocket = 0;
957 if (randfile == NULL) {
958 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
959 * If $HOME is not set or buffer too small to hold the pathname,
960 * an error occurs. - From RAND_file_name() man page.
961 * The fact is that when $HOME is NULL, .rnd is used.
963 randfile = RAND_file_name(buffer, sizeof( buffer ));
965 } else if (RAND_egd(randfile) > 0) {
971 if (randfile == NULL) {
972 Debug( LDAP_DEBUG_ANY,
973 "TLS: Use configuration file or $RANDFILE to define seed file",
978 RAND_load_file(randfile, -1);
980 if (RAND_status() == 0) {
981 Debug( LDAP_DEBUG_ANY,
982 "TLS: PRNG has not been seeded with enough data",
993 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )