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.
13 #include <ac/stdlib.h>
15 #include <ac/socket.h>
16 #include <ac/string.h>
18 #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 subsystem. Should be called only once.
103 ldap_pvt_tls_init( void )
105 static int tls_initialized = 0;
107 if ( tls_initialized ) return 0;
110 (void) tls_seed_PRNG( tls_opt_randfile );
112 #ifdef LDAP_R_COMPILE
116 SSL_load_error_strings();
117 SSLeay_add_ssl_algorithms();
119 /* FIXME: mod_ssl does this */
120 X509V3_add_standard_extensions();
125 * initialize the default context
128 ldap_pvt_tls_init_def_ctx( void )
130 STACK_OF(X509_NAME) *calist;
132 #ifdef LDAP_R_COMPILE
133 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
135 if ( tls_def_ctx == NULL ) {
136 tls_def_ctx = SSL_CTX_new( SSLv23_method() );
137 if ( tls_def_ctx == NULL ) {
138 Debug( LDAP_DEBUG_ANY,
139 "TLS: could not allocate default ctx.\n",0,0,0);
142 if ( tls_opt_ciphersuite &&
143 !SSL_CTX_set_cipher_list( tls_def_ctx,
144 tls_opt_ciphersuite ) ) {
145 Debug( LDAP_DEBUG_ANY,
146 "TLS: could not set cipher list %s.\n",
147 tls_opt_ciphersuite, 0, 0 );
151 if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
152 if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
155 || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
157 Debug( LDAP_DEBUG_ANY,
158 "TLS: could not load verify locations (file:`%s',dir:`%s').\n",
159 tls_opt_cacertfile,tls_opt_cacertdir,0);
163 calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
165 Debug( LDAP_DEBUG_ANY,
166 "TLS: could not load client CA list (file:`%s',dir:`%s').\n",
167 tls_opt_cacertfile,tls_opt_cacertdir,0);
171 SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
173 if ( tls_opt_keyfile &&
174 !SSL_CTX_use_PrivateKey_file( tls_def_ctx,
176 SSL_FILETYPE_PEM ) ) {
177 Debug( LDAP_DEBUG_ANY,
178 "TLS: could not use key file `%s'.\n",
179 tls_opt_keyfile,0,0);
183 if ( tls_opt_certfile &&
184 !SSL_CTX_use_certificate_file( tls_def_ctx,
186 SSL_FILETYPE_PEM ) ) {
187 Debug( LDAP_DEBUG_ANY,
188 "TLS: could not use certificate `%s'.\n",
189 tls_opt_certfile,0,0);
193 if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
194 !SSL_CTX_check_private_key( tls_def_ctx ) ) {
195 Debug( LDAP_DEBUG_ANY,
196 "TLS: private key mismatch.\n",
201 if ( tls_opt_trace ) {
202 SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
204 SSL_CTX_set_verify( tls_def_ctx,
205 tls_opt_require_cert ?
206 (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
209 SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
210 /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
212 #ifdef LDAP_R_COMPILE
213 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
217 if ( tls_def_ctx != NULL ) {
218 SSL_CTX_free( tls_def_ctx );
221 #ifdef LDAP_R_COMPILE
222 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
227 static STACK_OF(X509_NAME) *
228 get_ca_list( char * bundle, char * dir )
230 STACK_OF(X509_NAME) *ca_list = NULL;
233 ca_list = SSL_load_client_CA_file( bundle );
236 * FIXME: We have now to go over all files in dir, load them
237 * and add every certificate there to ca_list.
243 alloc_handle( void *ctx_arg )
249 ctx = (SSL_CTX *) ctx_arg;
251 if ( ldap_pvt_tls_init_def_ctx() < 0 )
256 ssl = SSL_new( ctx );
258 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
262 if ( tls_opt_trace ) {
263 SSL_set_info_callback( ssl, tls_info_cb );
269 update_flags( Sockbuf *sb, SSL * ssl, int rc )
271 int err = SSL_get_error(ssl, rc);
273 sb->sb_trans_needs_read = 0;
274 sb->sb_trans_needs_write = 0;
275 if (err == SSL_ERROR_WANT_READ)
277 sb->sb_trans_needs_read = 1;
279 } else if (err == SSL_ERROR_WANT_WRITE)
281 sb->sb_trans_needs_write = 1;
283 } else if (err == SSL_ERROR_WANT_CONNECT)
291 * TLS support for LBER Sockbufs
296 Sockbuf_IO_Desc *sbiod;
299 extern BIO_METHOD ldap_pvt_sb_bio_method;
302 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
307 assert( sbiod != NULL );
309 p = LBER_MALLOC( sizeof( *p ) );
315 bio = BIO_new( &ldap_pvt_sb_bio_method );
316 bio->ptr = (void *)p;
317 SSL_set_bio( p->ssl, bio, bio );
318 sbiod->sbiod_pvt = p;
323 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
327 assert( sbiod != NULL );
328 assert( sbiod->sbiod_pvt != NULL );
330 p = (struct tls_data *)sbiod->sbiod_pvt;
332 LBER_FREE( sbiod->sbiod_pvt );
333 sbiod->sbiod_pvt = NULL;
338 sb_tls_close( Sockbuf_IO_Desc *sbiod )
342 assert( sbiod != NULL );
343 assert( sbiod->sbiod_pvt != NULL );
345 p = (struct tls_data *)sbiod->sbiod_pvt;
346 SSL_shutdown( p->ssl );
351 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
355 assert( sbiod != NULL );
356 assert( sbiod->sbiod_pvt != NULL );
358 p = (struct tls_data *)sbiod->sbiod_pvt;
360 if ( opt == LBER_SB_OPT_GET_SSL ) {
361 *((SSL **)arg) = p->ssl;
365 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
369 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
375 assert( sbiod != NULL );
376 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
378 p = (struct tls_data *)sbiod->sbiod_pvt;
380 ret = SSL_read( p->ssl, (char *)buf, len );
382 errno = WSAGetLastError();
384 err = SSL_get_error( p->ssl, ret );
385 if (err == SSL_ERROR_WANT_READ ) {
386 sbiod->sbiod_sb->sb_trans_needs_read = 1;
392 sbiod->sbiod_sb->sb_trans_needs_read = 0;
397 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
403 assert( sbiod != NULL );
404 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
406 p = (struct tls_data *)sbiod->sbiod_pvt;
408 ret = SSL_write( p->ssl, (char *)buf, len );
410 errno = WSAGetLastError();
412 err = SSL_get_error( p->ssl, ret );
413 if (err == SSL_ERROR_WANT_WRITE ) {
414 sbiod->sbiod_sb->sb_trans_needs_write = 1;
420 sbiod->sbiod_sb->sb_trans_needs_write = 0;
424 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
426 sb_tls_setup, /* sbi_setup */
427 sb_tls_remove, /* sbi_remove */
428 sb_tls_ctrl, /* sbi_ctrl */
429 sb_tls_read, /* sbi_read */
430 sb_tls_write, /* sbi_write */
431 sb_tls_close /* sbi_close */
435 sb_tls_bio_create( BIO *b ) {
444 sb_tls_bio_destroy( BIO *b )
449 b->ptr = NULL; /* sb_tls_remove() will free it */
456 sb_tls_bio_read( BIO *b, char *buf, int len )
461 if ( buf == NULL || len <= 0 )
464 p = (struct tls_data *)b->ptr;
466 if ( p == NULL || p->sbiod == NULL )
469 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
471 BIO_clear_retry_flags( b );
472 if ( ret < 0 && errno == EWOULDBLOCK )
473 BIO_set_retry_read( b );
479 sb_tls_bio_write( BIO *b, char *buf, int len )
484 if ( buf == NULL || len <= 0 )
487 p = (struct tls_data *)b->ptr;
489 if ( p == NULL || p->sbiod == NULL )
492 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, buf, len );
494 BIO_clear_retry_flags( b );
495 if ( ret < 0 && errno == EWOULDBLOCK )
496 BIO_set_retry_write( b );
502 sb_tls_bio_ctrl( BIO *b, int cmd, long num, char *ptr )
504 if ( cmd == BIO_CTRL_FLUSH ) {
505 /* The OpenSSL library needs this */
512 sb_tls_bio_gets( BIO *b, char *buf, int len )
518 sb_tls_bio_puts( BIO *b, char *str )
520 return sb_tls_bio_write( b, str, strlen( str ) );
523 BIO_METHOD ldap_pvt_sb_bio_method =
525 ( 100 | 0x400 ), /* it's a source/sink BIO */
537 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
538 * a SSL_CTX * or NULL, in which case the default ctx is used.
542 * 0 - Success. Connection is ready for communication.
543 * <0 - Error. Can't create a TLS stream.
544 * >0 - Partial success.
545 * Do a select (using information from lber_pvt_sb_needs_{read,write}
550 ldap_pvt_tls_connect( LDAP *ld, Sockbuf *sb, void *ctx_arg )
555 if ( HAS_TLS( sb ) ) {
556 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
558 ssl = alloc_handle( ctx_arg );
562 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
563 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
565 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
566 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
569 err = SSL_connect( ssl );
572 errno = WSAGetLastError();
575 if ( update_flags( sb, ssl, err ))
577 if ((err = ERR_peek_error())) {
579 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
581 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
582 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
583 LBER_SBIOD_LEVEL_TRANSPORT );
585 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
586 LBER_SBIOD_LEVEL_TRANSPORT );
594 * Call this to do a TLS accept on a sockbuf.
595 * Everything else is the same as with tls_connect.
598 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
603 if ( HAS_TLS( sb ) ) {
604 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
606 ssl = alloc_handle( ctx_arg );
610 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
611 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
613 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
614 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
617 err = SSL_accept( ssl );
620 errno = WSAGetLastError();
623 if ( update_flags( sb, ssl, err ))
625 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
627 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
628 LBER_SBIOD_LEVEL_TRANSPORT );
630 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
631 LBER_SBIOD_LEVEL_TRANSPORT );
640 ldap_pvt_tls_inplace ( Sockbuf *sb )
648 ldap_pvt_tls_sb_handle( Sockbuf *sb )
653 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
661 ldap_pvt_tls_get_handle( LDAP *ld )
663 return ldap_pvt_tls_sb_handle( ld->ld_sb );
667 ldap_pvt_tls_get_strength( void *s )
671 c = SSL_get_current_cipher((SSL *)s);
672 return SSL_CIPHER_get_bits(c, NULL);
677 ldap_pvt_tls_get_peer( void *s )
683 x = SSL_get_peer_certificate((SSL *)s);
688 xn = X509_get_subject_name(x);
689 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
695 ldap_pvt_tls_get_peer_issuer( void *s )
697 #if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
702 x = SSL_get_peer_certificate((SSL *)s);
707 xn = X509_get_issuer_name(x);
708 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
717 ldap_int_tls_config( struct ldapoptions *lo, int option, const char *arg )
722 case LDAP_OPT_X_TLS_CACERTFILE:
723 case LDAP_OPT_X_TLS_CACERTDIR:
724 case LDAP_OPT_X_TLS_CERTFILE:
725 case LDAP_OPT_X_TLS_KEYFILE:
726 case LDAP_OPT_X_TLS_RANDOM_FILE:
727 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
728 case LDAP_OPT_X_TLS_REQUIRE_CERT:
729 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
730 ( strcasecmp( arg, "yes" ) == 0) ||
731 ( strcasecmp( arg, "true" ) == 0 ) );
732 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
735 if ( strcasecmp( arg, "never" ) == 0 )
736 i = LDAP_OPT_X_TLS_NEVER ;
737 if ( strcasecmp( arg, "demand" ) == 0 )
738 i = LDAP_OPT_X_TLS_DEMAND ;
739 if ( strcasecmp( arg, "allow" ) == 0 )
740 i = LDAP_OPT_X_TLS_ALLOW ;
741 if ( strcasecmp( arg, "try" ) == 0 )
742 i = LDAP_OPT_X_TLS_TRY ;
743 if ( strcasecmp( arg, "hard" ) == 0 )
744 i = LDAP_OPT_X_TLS_HARD ;
746 return ldap_pvt_tls_set_option( lo, option, &i );
754 ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
758 *(int *)arg = lo->ldo_tls_mode;
760 case LDAP_OPT_X_TLS_CERT:
762 *(void **)arg = (void *) tls_def_ctx;
764 *(void **)arg = lo->ldo_tls_ctx;
766 case LDAP_OPT_X_TLS_CACERTFILE:
767 *(char **)arg = tls_opt_cacertfile ?
768 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
770 case LDAP_OPT_X_TLS_CACERTDIR:
771 *(char **)arg = tls_opt_cacertdir ?
772 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
774 case LDAP_OPT_X_TLS_CERTFILE:
775 *(char **)arg = tls_opt_certfile ?
776 LDAP_STRDUP( tls_opt_certfile ) : NULL;
778 case LDAP_OPT_X_TLS_KEYFILE:
779 *(char **)arg = tls_opt_keyfile ?
780 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
782 case LDAP_OPT_X_TLS_REQUIRE_CERT:
783 *(int *)arg = tls_opt_require_cert;
785 case LDAP_OPT_X_TLS_RANDOM_FILE:
786 *(char **)arg = tls_opt_randfile;
795 ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
799 switch( *(int *) arg ) {
800 case LDAP_OPT_X_TLS_NEVER:
801 case LDAP_OPT_X_TLS_DEMAND:
802 case LDAP_OPT_X_TLS_ALLOW:
803 case LDAP_OPT_X_TLS_TRY:
804 case LDAP_OPT_X_TLS_HARD:
806 lo->ldo_tls_mode = *(int *)arg;
813 case LDAP_OPT_X_TLS_CERT:
815 tls_def_ctx = (SSL_CTX *) arg;
818 lo->ldo_tls_ctx = arg;
828 case LDAP_OPT_X_TLS_CACERTFILE:
829 if ( tls_opt_cacertfile ) free( tls_opt_cacertfile );
830 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
832 case LDAP_OPT_X_TLS_CACERTDIR:
833 if ( tls_opt_cacertdir ) free( tls_opt_cacertdir );
834 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
836 case LDAP_OPT_X_TLS_CERTFILE:
837 if ( tls_opt_certfile ) free( tls_opt_certfile );
838 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
840 case LDAP_OPT_X_TLS_KEYFILE:
841 if ( tls_opt_keyfile ) free( tls_opt_keyfile );
842 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
844 case LDAP_OPT_X_TLS_REQUIRE_CERT:
845 tls_opt_require_cert = * (int *) arg;
847 case LDAP_OPT_X_TLS_CIPHER_SUITE:
848 if ( tls_opt_ciphersuite ) free( tls_opt_ciphersuite );
849 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
851 case LDAP_OPT_X_TLS_RANDOM_FILE:
852 if (tls_opt_randfile ) free (tls_opt_randfile );
853 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
862 ldap_pvt_tls_start ( LDAP *ld, Sockbuf *sb, void *ctx_arg )
865 * Fortunately, the lib uses blocking io...
867 if ( ldap_pvt_tls_connect( ld, sb, ctx_arg ) < 0 ) {
868 return LDAP_CONNECT_ERROR;
871 /* FIXME: hostname of server must be compared with name in
878 /* Derived from openssl/apps/s_cb.c */
880 tls_info_cb( SSL *ssl, int where, int ret )
885 w = where & ~SSL_ST_MASK;
886 if ( w & SSL_ST_CONNECT ) {
888 } else if ( w & SSL_ST_ACCEPT ) {
894 if ( where & SSL_CB_LOOP ) {
895 Debug( LDAP_DEBUG_TRACE,
896 "TLS trace: %s:%s\n",
897 op, SSL_state_string_long( ssl ), 0 );
898 } else if ( where & SSL_CB_ALERT ) {
899 op = ( where & SSL_CB_READ ) ? "read" : "write";
900 Debug( LDAP_DEBUG_TRACE,
901 "TLS trace: SSL3 alert %s:%s:%s\n",
903 SSL_alert_type_string_long( ret ),
904 SSL_alert_desc_string_long( ret) );
905 } else if ( where & SSL_CB_EXIT ) {
907 Debug( LDAP_DEBUG_TRACE,
908 "TLS trace: %s:failed in %s\n",
909 op, SSL_state_string_long( ssl ), 0 );
910 } else if ( ret < 0 ) {
911 Debug( LDAP_DEBUG_TRACE,
912 "TLS trace: %s:error in %s\n",
913 op, SSL_state_string_long( ssl ), 0 );
919 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
929 cert = X509_STORE_CTX_get_current_cert( ctx );
930 errnum = X509_STORE_CTX_get_error( ctx );
931 errdepth = X509_STORE_CTX_get_error_depth( ctx );
934 * X509_get_*_name return pointers to the internal copies of
935 * those things requested. So do not free them.
937 subject = X509_get_subject_name( cert );
938 issuer = X509_get_issuer_name( cert );
939 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
940 sname = X509_NAME_oneline( subject, NULL, 0 );
941 iname = X509_NAME_oneline( issuer, NULL, 0 );
942 Debug( LDAP_DEBUG_TRACE,
943 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
945 sname ? sname : "-unknown-",
946 iname ? iname : "-unknown-" );
948 CRYPTO_free ( sname );
950 CRYPTO_free ( iname );
955 /* Inspired by ERR_print_errors in OpenSSL */
957 tls_report_error( void )
964 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
965 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
966 ERR_error_string( l, buf ), file, line );
971 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
975 /* FIXME: Pregenerate the key on startup */
976 /* FIXME: Who frees the key? */
977 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
980 Debug( LDAP_DEBUG_ANY,
981 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
982 key_length, is_export ? "export" : "domestic", 0 );
989 tls_seed_PRNG( const char *randfile )
991 #ifndef URANDOM_DEVICE
992 /* no /dev/urandom (or equiv) */
995 static int egdsocket = 0;
997 if (randfile == NULL) {
998 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
999 * If $HOME is not set or buffer too small to hold the pathname,
1000 * an error occurs. - From RAND_file_name() man page.
1001 * The fact is that when $HOME is NULL, .rnd is used.
1003 randfile = RAND_file_name(buffer, sizeof( buffer ));
1005 } else if (RAND_egd(randfile) > 0) {
1011 if (randfile == NULL) {
1012 Debug( LDAP_DEBUG_ANY,
1013 "TLS: Use configuration file or $RANDFILE to define seed file",
1018 RAND_load_file(randfile, -1);
1020 if (RAND_status() == 0) {
1021 Debug( LDAP_DEBUG_ANY,
1022 "TLS: PRNG has not been seeded with enough data",
1033 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
1041 ldap_start_tls_s ( LDAP *ld,
1042 LDAPControl **serverctrls,
1043 LDAPControl **clientctrls )
1047 char *rspoid = NULL;
1048 struct berval *rspdata = NULL;
1050 /* XXYYZ: this initiates operaton only on default connection! */
1052 if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
1053 return LDAP_LOCAL_ERROR;
1056 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1057 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1058 if ( rc != LDAP_SUCCESS ) {
1062 if ( rspoid != NULL ) {
1066 if ( rspdata != NULL ) {
1067 ber_bvfree( rspdata );
1070 rc = ldap_pvt_tls_start( ld, ld->ld_sb, ld->ld_options.ldo_tls_ctx );
1073 return LDAP_NOT_SUPPORTED;