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>
26 #include <ldap_pvt_thread.h>
29 #ifdef HAVE_OPENSSL_SSL_H
30 #include <openssl/ssl.h>
31 #include <openssl/x509v3.h>
32 #include <openssl/err.h>
33 #include <openssl/rand.h>
34 #include <openssl/safestack.h>
35 #elif defined( HAVE_SSL_H )
39 static int tls_opt_trace = 1;
40 static char *tls_opt_certfile = NULL;
41 static char *tls_opt_keyfile = NULL;
42 static char *tls_opt_cacertfile = NULL;
43 static char *tls_opt_cacertdir = NULL;
44 static int tls_opt_require_cert = 0;
45 static char *tls_opt_ciphersuite = NULL;
46 static char *tls_opt_randfile = NULL;
48 #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
49 (void *)&ldap_pvt_sockbuf_io_tls )
51 static void tls_report_error( void );
53 static void tls_info_cb( SSL *ssl, int where, int ret );
54 static int tls_verify_cb( int ok, X509_STORE_CTX *ctx );
55 static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
56 static STACK_OF(X509_NAME) * get_ca_list( char * bundle, char * dir );
58 #if 0 /* Currently this is not used by anyone */
59 static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
62 static SSL_CTX *tls_def_ctx = NULL;
64 static int tls_seed_PRNG( const char *randfile );
68 * provide mutexes for the SSLeay library.
70 static ldap_pvt_thread_mutex_t tls_mutexes[CRYPTO_NUM_LOCKS];
72 static void tls_locking_cb( int mode, int type, const char *file, int line )
74 if ( mode & CRYPTO_LOCK ) {
75 ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
77 ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
82 * an extra mutex for the default ctx.
85 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
87 static void tls_init_threads( void )
91 for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
92 ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
94 CRYPTO_set_locking_callback( tls_locking_cb );
95 /* FIXME: the thread id should be added somehow... */
97 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
99 #endif /* LDAP_R_COMPILE */
102 * Tear down the TLS subsystem. Should only be called once.
105 ldap_pvt_tls_destroy( void )
107 SSL_CTX_free(tls_def_ctx);
113 * Initialize TLS subsystem. Should be called only once.
116 ldap_pvt_tls_init( void )
118 static int tls_initialized = 0;
120 if ( tls_initialized ) return 0;
123 (void) tls_seed_PRNG( tls_opt_randfile );
125 #ifdef LDAP_R_COMPILE
129 SSL_load_error_strings();
130 SSLeay_add_ssl_algorithms();
132 /* FIXME: mod_ssl does this */
133 X509V3_add_standard_extensions();
138 * initialize the default context
141 ldap_pvt_tls_init_def_ctx( void )
143 STACK_OF(X509_NAME) *calist;
145 #ifdef LDAP_R_COMPILE
146 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
148 if ( tls_def_ctx == NULL ) {
149 tls_def_ctx = SSL_CTX_new( SSLv23_method() );
150 if ( tls_def_ctx == NULL ) {
151 Debug( LDAP_DEBUG_ANY,
152 "TLS: could not allocate default ctx (%d).\n",
153 ERR_peek_error(),0,0);
156 if ( tls_opt_ciphersuite &&
157 !SSL_CTX_set_cipher_list( tls_def_ctx,
158 tls_opt_ciphersuite ) )
160 Debug( LDAP_DEBUG_ANY,
161 "TLS: could not set cipher list %s.\n",
162 tls_opt_ciphersuite, 0, 0 );
166 if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
167 if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
170 || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
172 Debug( LDAP_DEBUG_ANY, "TLS: "
173 "could not load verify locations (file:`%s',dir:`%s').\n",
174 tls_opt_cacertfile ? tls_opt_cacertfile : "",
175 tls_opt_cacertdir ? tls_opt_cacertdir : "",
180 calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
182 Debug( LDAP_DEBUG_ANY, "TLS: "
183 "could not load client CA list (file:`%s',dir:`%s').\n",
184 tls_opt_cacertfile ? tls_opt_cacertfile : "",
185 tls_opt_cacertdir ? tls_opt_cacertdir : "",
190 SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
192 if ( tls_opt_keyfile &&
193 !SSL_CTX_use_PrivateKey_file( tls_def_ctx,
197 Debug( LDAP_DEBUG_ANY,
198 "TLS: could not use key file `%s'.\n",
199 tls_opt_keyfile,0,0);
203 if ( tls_opt_certfile &&
204 !SSL_CTX_use_certificate_file( tls_def_ctx,
208 Debug( LDAP_DEBUG_ANY,
209 "TLS: could not use certificate `%s'.\n",
210 tls_opt_certfile,0,0);
214 if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
215 !SSL_CTX_check_private_key( tls_def_ctx ) )
217 Debug( LDAP_DEBUG_ANY,
218 "TLS: private key mismatch.\n",
223 if ( tls_opt_trace ) {
224 SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
226 SSL_CTX_set_verify( tls_def_ctx,
227 tls_opt_require_cert ?
228 (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
231 SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
232 /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
234 #ifdef LDAP_R_COMPILE
235 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
239 if ( tls_def_ctx != NULL ) {
240 SSL_CTX_free( tls_def_ctx );
243 #ifdef LDAP_R_COMPILE
244 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
249 static STACK_OF(X509_NAME) *
250 get_ca_list( char * bundle, char * dir )
252 STACK_OF(X509_NAME) *ca_list = NULL;
255 ca_list = SSL_load_client_CA_file( bundle );
258 * FIXME: We have now to go over all files in dir, load them
259 * and add every certificate there to ca_list.
265 alloc_handle( void *ctx_arg )
271 ctx = (SSL_CTX *) ctx_arg;
273 if ( ldap_pvt_tls_init_def_ctx() < 0 ) return NULL;
277 ssl = SSL_new( ctx );
279 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
286 update_flags( Sockbuf *sb, SSL * ssl, int rc )
288 int err = SSL_get_error(ssl, rc);
290 sb->sb_trans_needs_read = 0;
291 sb->sb_trans_needs_write = 0;
292 if (err == SSL_ERROR_WANT_READ)
294 sb->sb_trans_needs_read = 1;
296 } else if (err == SSL_ERROR_WANT_WRITE)
298 sb->sb_trans_needs_write = 1;
300 } else if (err == SSL_ERROR_WANT_CONNECT)
308 * TLS support for LBER Sockbufs
313 Sockbuf_IO_Desc *sbiod;
316 extern BIO_METHOD ldap_pvt_sb_bio_method;
319 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
324 assert( sbiod != NULL );
326 p = LBER_MALLOC( sizeof( *p ) );
332 bio = BIO_new( &ldap_pvt_sb_bio_method );
333 bio->ptr = (void *)p;
334 SSL_set_bio( p->ssl, bio, bio );
335 sbiod->sbiod_pvt = p;
340 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
344 assert( sbiod != NULL );
345 assert( sbiod->sbiod_pvt != NULL );
347 p = (struct tls_data *)sbiod->sbiod_pvt;
349 LBER_FREE( sbiod->sbiod_pvt );
350 sbiod->sbiod_pvt = NULL;
355 sb_tls_close( Sockbuf_IO_Desc *sbiod )
359 assert( sbiod != NULL );
360 assert( sbiod->sbiod_pvt != NULL );
362 p = (struct tls_data *)sbiod->sbiod_pvt;
363 SSL_shutdown( p->ssl );
368 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
372 assert( sbiod != NULL );
373 assert( sbiod->sbiod_pvt != NULL );
375 p = (struct tls_data *)sbiod->sbiod_pvt;
377 if ( opt == LBER_SB_OPT_GET_SSL ) {
378 *((SSL **)arg) = p->ssl;
381 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
382 if( SSL_pending( p->ssl ) > 0 ) {
387 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
391 sb_tls_read( 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_read( p->ssl, (char *)buf, len );
404 errno = WSAGetLastError();
406 err = SSL_get_error( p->ssl, ret );
407 if (err == SSL_ERROR_WANT_READ ) {
408 sbiod->sbiod_sb->sb_trans_needs_read = 1;
414 sbiod->sbiod_sb->sb_trans_needs_read = 0;
419 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
425 assert( sbiod != NULL );
426 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
428 p = (struct tls_data *)sbiod->sbiod_pvt;
430 ret = SSL_write( p->ssl, (char *)buf, len );
432 errno = WSAGetLastError();
434 err = SSL_get_error( p->ssl, ret );
435 if (err == SSL_ERROR_WANT_WRITE ) {
436 sbiod->sbiod_sb->sb_trans_needs_write = 1;
442 sbiod->sbiod_sb->sb_trans_needs_write = 0;
446 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
448 sb_tls_setup, /* sbi_setup */
449 sb_tls_remove, /* sbi_remove */
450 sb_tls_ctrl, /* sbi_ctrl */
451 sb_tls_read, /* sbi_read */
452 sb_tls_write, /* sbi_write */
453 sb_tls_close /* sbi_close */
457 sb_tls_bio_create( BIO *b ) {
466 sb_tls_bio_destroy( BIO *b )
471 b->ptr = NULL; /* sb_tls_remove() will free it */
478 sb_tls_bio_read( BIO *b, char *buf, int len )
483 if ( buf == NULL || len <= 0 )
486 p = (struct tls_data *)b->ptr;
488 if ( p == NULL || p->sbiod == NULL )
491 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
493 BIO_clear_retry_flags( b );
494 if ( ret < 0 && errno == EWOULDBLOCK )
495 BIO_set_retry_read( b );
501 sb_tls_bio_write( BIO *b, const char *buf, int len )
506 if ( buf == NULL || len <= 0 )
509 p = (struct tls_data *)b->ptr;
511 if ( p == NULL || p->sbiod == NULL )
514 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
516 BIO_clear_retry_flags( b );
517 if ( ret < 0 && errno == EWOULDBLOCK )
518 BIO_set_retry_write( b );
524 sb_tls_bio_ctrl( BIO *b, int cmd, long num, void *ptr )
526 if ( cmd == BIO_CTRL_FLUSH ) {
527 /* The OpenSSL library needs this */
534 sb_tls_bio_gets( BIO *b, char *buf, int len )
540 sb_tls_bio_puts( BIO *b, const char *str )
542 return sb_tls_bio_write( b, str, strlen( str ) );
545 BIO_METHOD ldap_pvt_sb_bio_method =
547 ( 100 | 0x400 ), /* it's a source/sink BIO */
559 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
560 * a SSL_CTX * or NULL, in which case the default ctx is used.
564 * 0 - Success. Connection is ready for communication.
565 * <0 - Error. Can't create a TLS stream.
566 * >0 - Partial success.
567 * Do a select (using information from lber_pvt_sb_needs_{read,write}
572 ldap_int_tls_connect( LDAP *ld, LDAPConn *conn )
574 Sockbuf *sb = conn->lconn_sb;
578 if ( HAS_TLS( sb ) ) {
579 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
582 void *ctx = ld->ld_defconn
583 ? ld->ld_defconn->lconn_tls_ctx : NULL;
585 ssl = alloc_handle( ctx );
587 if ( ssl == NULL ) return -1;
590 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
591 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
593 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
594 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
597 conn->lconn_tls_ctx = tls_def_ctx;
601 err = SSL_connect( ssl );
604 errno = WSAGetLastError();
607 if ( update_flags( sb, ssl, err )) {
610 if ((err = ERR_peek_error())) {
612 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
614 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
615 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
616 LBER_SBIOD_LEVEL_TRANSPORT );
618 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
619 LBER_SBIOD_LEVEL_TRANSPORT );
628 * Call this to do a TLS accept on a sockbuf.
629 * Everything else is the same as with tls_connect.
632 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
637 if ( HAS_TLS( sb ) ) {
638 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
640 ssl = alloc_handle( ctx_arg );
644 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
645 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
647 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
648 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
651 err = SSL_accept( ssl );
654 errno = WSAGetLastError();
657 if ( update_flags( sb, ssl, err ))
659 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
661 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
662 LBER_SBIOD_LEVEL_TRANSPORT );
664 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
665 LBER_SBIOD_LEVEL_TRANSPORT );
674 ldap_pvt_tls_inplace ( Sockbuf *sb )
682 ldap_pvt_tls_sb_ctx( Sockbuf *sb )
687 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
695 ldap_pvt_tls_get_strength( void *s )
699 c = SSL_get_current_cipher((SSL *)s);
700 return SSL_CIPHER_get_bits(c, NULL);
705 ldap_pvt_tls_get_peer( void *s )
711 x = SSL_get_peer_certificate((SSL *)s);
716 xn = X509_get_subject_name(x);
717 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
723 ldap_pvt_tls_get_peer_dn( void *s )
727 char buf[2048], *p, *dn;
729 x = SSL_get_peer_certificate((SSL *)s);
733 xn = X509_get_subject_name(x);
734 p = X509_NAME_oneline(xn, buf, sizeof(buf));
736 dn = ldap_dcedn2dn( p );
743 ldap_pvt_tls_get_peer_hostname( void *s )
750 x = SSL_get_peer_certificate((SSL *)s);
755 xn = X509_get_subject_name(x);
757 ret = X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf));
763 p = LDAP_STRDUP(buf);
769 ldap_pvt_tls_check_hostname( void *s, char *name )
771 int i, ret = LDAP_LOCAL_ERROR;
774 x = SSL_get_peer_certificate((SSL *)s);
777 Debug( LDAP_DEBUG_ANY,
778 "TLS: unable to get peer certificate.\n",
783 i = X509_get_ext_by_NID(x, NID_subject_alt_name, -1);
787 STACK_OF(GENERAL_NAME) *alt;
789 ex = X509_get_ext(x, i);
790 alt = X509V3_EXT_d2i(ex);
796 X509V3_EXT_METHOD *method;
799 n = sk_GENERAL_NAME_num(alt);
800 domain = strchr(name, '.');
802 len2 = len1 - (domain-name);
805 gn = sk_GENERAL_NAME_value(alt, i);
806 if (gn->type == GEN_DNS)
808 char *sn = ASN1_STRING_data(gn->d.ia5);
809 int sl = ASN1_STRING_length(gn->d.ia5);
811 /* Is this an exact match? */
812 if ((len1 == sl) && !strncasecmp(name, sn, len1))
815 /* Is this a wildcard match? */
816 if ((*sn == '*') && domain && (len2 == sl-1) &&
817 !strncasecmp(domain, sn+1, len2))
821 method = X509V3_EXT_get(ex);
822 method->ext_free(alt);
823 if (i < n) /* Found a match */
828 if (ret != LDAP_SUCCESS)
833 xn = X509_get_subject_name(x);
835 if (X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf))
838 Debug( LDAP_DEBUG_ANY,
839 "TLS: unable to get common name from peer certificate.\n",
841 } else if (strcasecmp(name, buf))
843 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
844 "common name in certificate (%s).\n",
846 ret = LDAP_CONNECT_ERROR;
857 ldap_pvt_tls_get_peer_issuer( void *s )
859 #if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
864 x = SSL_get_peer_certificate((SSL *)s);
869 xn = X509_get_issuer_name(x);
870 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
879 ldap_int_tls_config( LDAP *ld, int option, const char *arg )
884 case LDAP_OPT_X_TLS_CACERTFILE:
885 case LDAP_OPT_X_TLS_CACERTDIR:
886 case LDAP_OPT_X_TLS_CERTFILE:
887 case LDAP_OPT_X_TLS_KEYFILE:
888 case LDAP_OPT_X_TLS_RANDOM_FILE:
889 return ldap_pvt_tls_set_option( ld, option, (void *) arg );
891 case LDAP_OPT_X_TLS_REQUIRE_CERT:
892 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
893 ( strcasecmp( arg, "yes" ) == 0) ||
894 ( strcasecmp( arg, "true" ) == 0 ) );
895 return ldap_pvt_tls_set_option( ld, option, (void *) &i );
899 if ( strcasecmp( arg, "never" ) == 0 )
900 i = LDAP_OPT_X_TLS_NEVER ;
901 if ( strcasecmp( arg, "demand" ) == 0 )
902 i = LDAP_OPT_X_TLS_DEMAND ;
903 if ( strcasecmp( arg, "allow" ) == 0 )
904 i = LDAP_OPT_X_TLS_ALLOW ;
905 if ( strcasecmp( arg, "try" ) == 0 )
906 i = LDAP_OPT_X_TLS_TRY ;
907 if ( strcasecmp( arg, "hard" ) == 0 )
908 i = LDAP_OPT_X_TLS_HARD ;
911 return ldap_pvt_tls_set_option( ld, option, &i );
920 ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
922 struct ldapoptions *lo;
925 assert( LDAP_VALID( ld ) );
927 if( !LDAP_VALID( ld ) ) {
928 return LDAP_OPT_ERROR;
931 lo = &ld->ld_options;
934 /* Get pointer to global option structure */
935 lo = LDAP_INT_GLOBAL_OPT();
937 return LDAP_NO_MEMORY;
943 *(int *)arg = lo->ldo_tls_mode;
945 case LDAP_OPT_X_TLS_CTX:
947 *(void **)arg = (void *) tls_def_ctx;
949 *(void **)arg = ld->ld_defconn->lconn_tls_ctx;
951 case LDAP_OPT_X_TLS_CACERTFILE:
952 *(char **)arg = tls_opt_cacertfile ?
953 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
955 case LDAP_OPT_X_TLS_CACERTDIR:
956 *(char **)arg = tls_opt_cacertdir ?
957 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
959 case LDAP_OPT_X_TLS_CERTFILE:
960 *(char **)arg = tls_opt_certfile ?
961 LDAP_STRDUP( tls_opt_certfile ) : NULL;
963 case LDAP_OPT_X_TLS_KEYFILE:
964 *(char **)arg = tls_opt_keyfile ?
965 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
967 case LDAP_OPT_X_TLS_REQUIRE_CERT:
968 *(int *)arg = tls_opt_require_cert;
970 case LDAP_OPT_X_TLS_RANDOM_FILE:
971 *(char **)arg = tls_opt_randfile;
980 ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
982 struct ldapoptions *lo;
985 assert( LDAP_VALID( ld ) );
987 if( !LDAP_VALID( ld ) ) {
988 return LDAP_OPT_ERROR;
991 lo = &ld->ld_options;
994 /* Get pointer to global option structure */
995 lo = LDAP_INT_GLOBAL_OPT();
997 return LDAP_NO_MEMORY;
1002 case LDAP_OPT_X_TLS:
1003 switch( *(int *) arg ) {
1004 case LDAP_OPT_X_TLS_NEVER:
1005 case LDAP_OPT_X_TLS_DEMAND:
1006 case LDAP_OPT_X_TLS_ALLOW:
1007 case LDAP_OPT_X_TLS_TRY:
1008 case LDAP_OPT_X_TLS_HARD:
1010 lo->ldo_tls_mode = *(int *)arg;
1017 case LDAP_OPT_X_TLS_CTX:
1019 tls_def_ctx = (SSL_CTX *) arg;
1022 ld->ld_defconn->lconn_tls_ctx = arg;
1032 case LDAP_OPT_X_TLS_CACERTFILE:
1033 if ( tls_opt_cacertfile ) LDAP_FREE( tls_opt_cacertfile );
1034 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
1036 case LDAP_OPT_X_TLS_CACERTDIR:
1037 if ( tls_opt_cacertdir ) LDAP_FREE( tls_opt_cacertdir );
1038 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
1040 case LDAP_OPT_X_TLS_CERTFILE:
1041 if ( tls_opt_certfile ) LDAP_FREE( tls_opt_certfile );
1042 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
1044 case LDAP_OPT_X_TLS_KEYFILE:
1045 if ( tls_opt_keyfile ) LDAP_FREE( tls_opt_keyfile );
1046 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
1048 case LDAP_OPT_X_TLS_REQUIRE_CERT:
1049 tls_opt_require_cert = * (int *) arg;
1051 case LDAP_OPT_X_TLS_CIPHER_SUITE:
1052 if ( tls_opt_ciphersuite ) LDAP_FREE( tls_opt_ciphersuite );
1053 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
1055 case LDAP_OPT_X_TLS_RANDOM_FILE:
1056 if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
1057 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
1066 ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
1068 Sockbuf *sb = conn->lconn_sb;
1073 host = srv->lud_host;
1075 host = conn->lconn_server->lud_host;
1078 /* avoid NULL host */
1079 if( host == NULL ) host = "localhost";
1081 (void) ldap_pvt_tls_init();
1084 * Fortunately, the lib uses blocking io...
1086 if ( ldap_int_tls_connect( ld, conn ) < 0 ) {
1087 ld->ld_errno = LDAP_CONNECT_ERROR;
1088 return (ld->ld_errno);
1091 ssl = (void *) ldap_pvt_tls_sb_ctx( sb );
1092 assert( ssl != NULL );
1095 * compare host with name(s) in certificate
1097 ld->ld_errno = ldap_pvt_tls_check_hostname( ssl, host );
1098 if (ld->ld_errno != LDAP_SUCCESS) {
1099 return ld->ld_errno;
1103 * set SASL properties to TLS ssf and authid
1109 /* we need to let SASL know */
1110 ssf = ldap_pvt_tls_get_strength( ssl );
1111 authid = ldap_pvt_tls_get_peer( ssl );
1113 (void) ldap_int_sasl_external( ld, conn, authid, ssf );
1116 return LDAP_SUCCESS;
1119 /* Derived from openssl/apps/s_cb.c */
1121 tls_info_cb( SSL *ssl, int where, int ret )
1126 w = where & ~SSL_ST_MASK;
1127 if ( w & SSL_ST_CONNECT ) {
1129 } else if ( w & SSL_ST_ACCEPT ) {
1135 if ( where & SSL_CB_LOOP ) {
1136 Debug( LDAP_DEBUG_TRACE,
1137 "TLS trace: %s:%s\n",
1138 op, SSL_state_string_long( ssl ), 0 );
1139 } else if ( where & SSL_CB_ALERT ) {
1140 op = ( where & SSL_CB_READ ) ? "read" : "write";
1141 Debug( LDAP_DEBUG_TRACE,
1142 "TLS trace: SSL3 alert %s:%s:%s\n",
1144 SSL_alert_type_string_long( ret ),
1145 SSL_alert_desc_string_long( ret) );
1146 } else if ( where & SSL_CB_EXIT ) {
1148 Debug( LDAP_DEBUG_TRACE,
1149 "TLS trace: %s:failed in %s\n",
1150 op, SSL_state_string_long( ssl ), 0 );
1151 } else if ( ret < 0 ) {
1152 Debug( LDAP_DEBUG_TRACE,
1153 "TLS trace: %s:error in %s\n",
1154 op, SSL_state_string_long( ssl ), 0 );
1160 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
1170 cert = X509_STORE_CTX_get_current_cert( ctx );
1171 errnum = X509_STORE_CTX_get_error( ctx );
1172 errdepth = X509_STORE_CTX_get_error_depth( ctx );
1175 * X509_get_*_name return pointers to the internal copies of
1176 * those things requested. So do not free them.
1178 subject = X509_get_subject_name( cert );
1179 issuer = X509_get_issuer_name( cert );
1180 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
1181 sname = X509_NAME_oneline( subject, NULL, 0 );
1182 iname = X509_NAME_oneline( issuer, NULL, 0 );
1183 Debug( LDAP_DEBUG_TRACE,
1184 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
1186 sname ? sname : "-unknown-",
1187 iname ? iname : "-unknown-" );
1189 CRYPTO_free ( sname );
1191 CRYPTO_free ( iname );
1196 /* Inspired by ERR_print_errors in OpenSSL */
1198 tls_report_error( void )
1205 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
1206 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
1207 ERR_error_string( l, buf ), file, line );
1212 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
1216 /* FIXME: Pregenerate the key on startup */
1217 /* FIXME: Who frees the key? */
1218 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
1221 Debug( LDAP_DEBUG_ANY,
1222 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
1223 key_length, is_export ? "export" : "domestic", 0 );
1230 tls_seed_PRNG( const char *randfile )
1232 #ifndef URANDOM_DEVICE
1233 /* no /dev/urandom (or equiv) */
1235 char buffer[MAXPATHLEN];
1237 if (randfile == NULL) {
1238 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
1239 * If $HOME is not set or buffer too small to hold the pathname,
1240 * an error occurs. - From RAND_file_name() man page.
1241 * The fact is that when $HOME is NULL, .rnd is used.
1243 randfile = RAND_file_name( buffer, sizeof( buffer ) );
1245 } else if (RAND_egd(randfile) > 0) {
1250 if (randfile == NULL) {
1251 Debug( LDAP_DEBUG_ANY,
1252 "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
1257 total = RAND_load_file(randfile, -1);
1259 if (RAND_status() == 0) {
1260 Debug( LDAP_DEBUG_ANY,
1261 "TLS: PRNG not been seeded with enough data\n",
1266 /* assume if there was enough bits to seed that it's okay
1267 * to write derived bits to the file
1269 RAND_write_file(randfile);
1278 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
1286 ldap_start_tls_s ( LDAP *ld,
1287 LDAPControl **serverctrls,
1288 LDAPControl **clientctrls )
1293 char *rspoid = NULL;
1294 struct berval *rspdata = NULL;
1296 /* XXYYZ: this initiates operation only on default connection! */
1298 if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
1299 return LDAP_LOCAL_ERROR;
1302 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1303 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1304 if ( rc != LDAP_SUCCESS ) {
1308 if ( rspoid != NULL ) {
1312 if ( rspdata != NULL ) {
1313 ber_bvfree( rspdata );
1316 rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
1318 rc = LDAP_NOT_SUPPORTED;