1 /* tls_g.c - Handle tls/ssl using GNUTLS. */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2008-2011 The OpenLDAP Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
16 /* ACKNOWLEDGEMENTS: GNUTLS support written by Howard Chu and
17 * Matt Backes; sponsored by The Written Word (thewrittenword.com)
18 * and Stanford University (stanford.edu).
25 #include "ldap_config.h"
29 #include <ac/stdlib.h>
31 #include <ac/socket.h>
32 #include <ac/string.h>
35 #include <ac/unistd.h>
37 #include <ac/dirent.h>
44 #include <gnutls/gnutls.h>
45 #include <gnutls/x509.h>
48 #define DH_BITS (1024)
50 #if LIBGNUTLS_VERSION_NUMBER >= 0x020200
51 #define HAVE_CIPHERSUITES 1
52 /* This is a kludge. gcrypt 1.4.x has support. Recent GnuTLS requires gcrypt 1.4.x
53 * but that dependency isn't reflected in their configure script, resulting in
54 * build errors on older gcrypt. So, if they have a working build environment,
55 * assume gcrypt is new enough.
57 #define HAVE_GCRYPT_RAND 1
59 #undef HAVE_CIPHERSUITES
60 #undef HAVE_GCRYPT_RAND
63 #ifndef HAVE_CIPHERSUITES
64 /* Versions prior to 2.2.0 didn't handle cipher suites, so we had to
65 * kludge them ourselves.
67 typedef struct tls_cipher_suite {
69 gnutls_kx_algorithm_t kx;
70 gnutls_cipher_algorithm_t cipher;
71 gnutls_mac_algorithm_t mac;
72 gnutls_protocol_t version;
76 typedef struct tlsg_ctx {
77 struct ldapoptions *lo;
78 gnutls_certificate_credentials_t cred;
79 gnutls_dh_params_t dh_params;
80 unsigned long verify_depth;
82 #ifdef HAVE_CIPHERSUITES
83 gnutls_priority_t prios;
90 ldap_pvt_thread_mutex_t ref_mutex;
94 typedef struct tlsg_session {
95 gnutls_session_t session;
97 struct berval peer_der_dn;
100 #ifndef HAVE_CIPHERSUITES
101 static tls_cipher_suite *tlsg_ciphers;
102 static int tlsg_n_ciphers;
105 static int tlsg_parse_ciphers( tlsg_ctx *ctx, char *suites );
106 static int tlsg_cert_verify( tlsg_session *s );
108 #ifdef LDAP_R_COMPILE
111 tlsg_mutex_init( void **priv )
114 ldap_pvt_thread_mutex_t *lock = LDAP_MALLOC( sizeof( ldap_pvt_thread_mutex_t ));
119 err = ldap_pvt_thread_mutex_init( lock );
129 tlsg_mutex_destroy( void **lock )
131 int err = ldap_pvt_thread_mutex_destroy( *lock );
137 tlsg_mutex_lock( void **lock )
139 return ldap_pvt_thread_mutex_lock( *lock );
143 tlsg_mutex_unlock( void **lock )
145 return ldap_pvt_thread_mutex_unlock( *lock );
148 static struct gcry_thread_cbs tlsg_thread_cbs = {
149 GCRY_THREAD_OPTION_USER,
155 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
159 tlsg_thr_init( void )
161 gcry_control (GCRYCTL_SET_THREAD_CBS, &tlsg_thread_cbs);
163 #endif /* LDAP_R_COMPILE */
166 * Initialize TLS subsystem. Should be called only once.
171 #ifdef HAVE_GCRYPT_RAND
172 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
173 if ( lo->ldo_tls_randfile &&
174 gcry_control( GCRYCTL_SET_RNDEGD_SOCKET, lo->ldo_tls_randfile )) {
175 Debug( LDAP_DEBUG_ANY,
176 "TLS: gcry_control GCRYCTL_SET_RNDEGD_SOCKET failed\n",
182 gnutls_global_init();
184 #ifndef HAVE_CIPHERSUITES
185 /* GNUtls cipher suite handling: The library ought to parse suite
186 * names for us, but it doesn't. It will return a list of suite names
187 * that it supports, so we can do parsing ourselves. It ought to tell
188 * us how long the list is, but it doesn't do that either, so we just
189 * have to count it manually...
193 tls_cipher_suite *ptr, tmp;
196 while ( gnutls_cipher_suite_info( i, cs_id, &tmp.kx, &tmp.cipher,
197 &tmp.mac, &tmp.version ))
202 tlsg_ciphers = LDAP_MALLOC(tlsg_n_ciphers * sizeof(tls_cipher_suite));
205 for ( i=0; i<tlsg_n_ciphers; i++ ) {
206 tlsg_ciphers[i].name = gnutls_cipher_suite_info( i, cs_id,
207 &tlsg_ciphers[i].kx, &tlsg_ciphers[i].cipher, &tlsg_ciphers[i].mac,
208 &tlsg_ciphers[i].version );
216 * Tear down the TLS subsystem. Should only be called once.
221 #ifndef HAVE_CIPHERSUITES
222 LDAP_FREE( tlsg_ciphers );
226 gnutls_global_deinit();
230 tlsg_ctx_new ( struct ldapoptions *lo )
234 ctx = ber_memcalloc ( 1, sizeof (*ctx) );
237 if ( gnutls_certificate_allocate_credentials( &ctx->cred )) {
242 #ifdef HAVE_CIPHERSUITES
243 gnutls_priority_init( &ctx->prios, "NORMAL", NULL );
245 #ifdef LDAP_R_COMPILE
246 ldap_pvt_thread_mutex_init( &ctx->ref_mutex );
249 return (tls_ctx *)ctx;
253 tlsg_ctx_ref( tls_ctx *ctx )
255 tlsg_ctx *c = (tlsg_ctx *)ctx;
256 LDAP_MUTEX_LOCK( &c->ref_mutex );
258 LDAP_MUTEX_UNLOCK( &c->ref_mutex );
262 tlsg_ctx_free ( tls_ctx *ctx )
264 tlsg_ctx *c = (tlsg_ctx *)ctx;
269 LDAP_MUTEX_LOCK( &c->ref_mutex );
270 refcount = --c->refcount;
271 LDAP_MUTEX_UNLOCK( &c->ref_mutex );
274 #ifdef HAVE_CIPHERSUITES
275 gnutls_priority_deinit( c->prios );
277 LDAP_FREE( c->kx_list );
279 gnutls_certificate_free_credentials( c->cred );
284 tlsg_getfile( const char *path, gnutls_datum_t *buf )
289 fd = open( path, O_RDONLY );
290 if ( fd >= 0 && fstat( fd, &st ) == 0 ) {
291 buf->size = st.st_size;
292 buf->data = LDAP_MALLOC( st.st_size + 1 );
294 rc = read( fd, buf->data, st.st_size );
296 if ( rc < st.st_size )
305 /* This is the GnuTLS default */
306 #define VERIFY_DEPTH 6
309 * initialize a new TLS context
312 tlsg_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server )
314 tlsg_ctx *ctx = lo->ldo_tls_ctx;
317 if ( lo->ldo_tls_ciphersuite &&
318 tlsg_parse_ciphers( ctx, lt->lt_ciphersuite )) {
319 Debug( LDAP_DEBUG_ANY,
320 "TLS: could not set cipher list %s.\n",
321 lo->ldo_tls_ciphersuite, 0, 0 );
325 if (lo->ldo_tls_cacertdir != NULL) {
326 Debug( LDAP_DEBUG_ANY,
327 "TLS: warning: cacertdir not implemented for gnutls\n",
331 if (lo->ldo_tls_cacertfile != NULL) {
332 rc = gnutls_certificate_set_x509_trust_file(
335 GNUTLS_X509_FMT_PEM );
336 if ( rc < 0 ) return -1;
339 if ( lo->ldo_tls_certfile && lo->ldo_tls_keyfile ) {
340 gnutls_x509_privkey_t key;
342 gnutls_x509_crt_t certs[VERIFY_DEPTH];
343 unsigned int max = VERIFY_DEPTH;
345 rc = gnutls_x509_privkey_init( &key );
348 /* OpenSSL builds the cert chain for us, but GnuTLS
349 * expects it to be present in the certfile. If it's
350 * not, we have to build it ourselves. So we have to
351 * do some special checks here...
353 rc = tlsg_getfile( lt->lt_keyfile, &buf );
355 rc = gnutls_x509_privkey_import( key, &buf,
356 GNUTLS_X509_FMT_PEM );
357 LDAP_FREE( buf.data );
358 if ( rc < 0 ) return rc;
360 rc = tlsg_getfile( lt->lt_certfile, &buf );
362 rc = gnutls_x509_crt_list_import( certs, &max, &buf,
363 GNUTLS_X509_FMT_PEM, 0 );
364 LDAP_FREE( buf.data );
365 if ( rc < 0 ) return rc;
367 /* If there's only one cert and it's not self-signed,
368 * then we have to build the cert chain.
370 if ( max == 1 && !gnutls_x509_crt_check_issuer( certs[0], certs[0] )) {
371 gnutls_x509_crt_t *cas;
372 unsigned int i, j, ncas;
374 gnutls_certificate_get_x509_cas( ctx->cred, &cas, &ncas );
375 for ( i = 1; i<VERIFY_DEPTH; i++ ) {
376 for ( j = 0; j<ncas; j++ ) {
377 if ( gnutls_x509_crt_check_issuer( certs[i-1], cas[j] )) {
380 /* If this CA is self-signed, we're done */
381 if ( gnutls_x509_crt_check_issuer( cas[j], cas[j] ))
386 /* only continue if we found a CA and it was not self-signed */
391 rc = gnutls_certificate_set_x509_key( ctx->cred, certs, max, key );
393 } else if ( lo->ldo_tls_certfile || lo->ldo_tls_keyfile ) {
394 Debug( LDAP_DEBUG_ANY,
395 "TLS: only one of certfile and keyfile specified\n",
400 if ( lo->ldo_tls_dhfile ) {
401 Debug( LDAP_DEBUG_ANY,
402 "TLS: warning: ignoring dhfile\n",
406 if ( lo->ldo_tls_crlfile ) {
407 rc = gnutls_certificate_set_x509_crl_file(
410 GNUTLS_X509_FMT_PEM );
411 if ( rc < 0 ) return -1;
415 /* FIXME: ITS#5992 - this should go be configurable,
416 * and V1 CA certs should be phased out ASAP.
418 gnutls_certificate_set_verify_flags( ctx->cred,
419 GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT );
422 gnutls_dh_params_init(&ctx->dh_params);
423 gnutls_dh_params_generate2(ctx->dh_params, DH_BITS);
429 tlsg_session_new ( tls_ctx * ctx, int is_server )
431 tlsg_ctx *c = (tlsg_ctx *)ctx;
432 tlsg_session *session;
434 session = ber_memcalloc ( 1, sizeof (*session) );
439 gnutls_init( &session->session, is_server ? GNUTLS_SERVER : GNUTLS_CLIENT );
440 #ifdef HAVE_CIPHERSUITES
441 gnutls_priority_set( session->session, c->prios );
443 gnutls_set_default_priority( session->session );
445 gnutls_kx_set_priority( session->session, c->kx_list );
446 gnutls_cipher_set_priority( session->session, c->cipher_list );
447 gnutls_mac_set_priority( session->session, c->mac_list );
451 gnutls_credentials_set( session->session, GNUTLS_CRD_CERTIFICATE, c->cred );
455 if ( c->lo->ldo_tls_require_cert ) {
456 flag = GNUTLS_CERT_REQUEST;
457 if ( c->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
458 c->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD )
459 flag = GNUTLS_CERT_REQUIRE;
460 gnutls_certificate_server_set_request( session->session, flag );
463 return (tls_session *)session;
467 tlsg_session_accept( tls_session *session )
469 tlsg_session *s = (tlsg_session *)session;
472 rc = gnutls_handshake( s->session );
473 if ( rc == 0 && s->ctx->lo->ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER ) {
474 const gnutls_datum_t *peer_cert_list;
475 unsigned int list_size;
477 peer_cert_list = gnutls_certificate_get_peers( s->session,
479 if ( !peer_cert_list && s->ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_TRY )
482 rc = tlsg_cert_verify( s );
483 if ( rc && s->ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_ALLOW )
491 tlsg_session_connect( LDAP *ld, tls_session *session )
493 return tlsg_session_accept( session);
497 tlsg_session_upflags( Sockbuf *sb, tls_session *session, int rc )
499 tlsg_session *s = (tlsg_session *)session;
501 if ( rc != GNUTLS_E_INTERRUPTED && rc != GNUTLS_E_AGAIN )
504 switch (gnutls_record_get_direction (s->session)) {
506 sb->sb_trans_needs_read = 1;
509 sb->sb_trans_needs_write = 1;
516 tlsg_session_errmsg( tls_session *sess, int rc, char *buf, size_t len )
518 return (char *)gnutls_strerror( rc );
522 tlsg_x509_cert_dn( struct berval *cert, struct berval *dn, int get_subject )
524 BerElementBuffer berbuf;
525 BerElement *ber = (BerElement *)&berbuf;
530 ber_init2( ber, cert, LBER_USE_DER );
531 tag = ber_skip_tag( ber, &len ); /* Sequence */
532 tag = ber_skip_tag( ber, &len ); /* Sequence */
533 tag = ber_skip_tag( ber, &len ); /* Context + Constructed (version) */
534 if ( tag == 0xa0 ) /* Version is optional */
535 tag = ber_get_int( ber, &i ); /* Int: Version */
536 tag = ber_skip_tag( ber, &len ); /* Int: Serial (can be longer than ber_int_t) */
537 ber_skip_data( ber, len );
538 tag = ber_skip_tag( ber, &len ); /* Sequence: Signature */
539 ber_skip_data( ber, len );
540 if ( !get_subject ) {
541 tag = ber_peek_tag( ber, &len ); /* Sequence: Issuer DN */
543 tag = ber_skip_tag( ber, &len );
544 ber_skip_data( ber, len );
545 tag = ber_skip_tag( ber, &len ); /* Sequence: Validity */
546 ber_skip_data( ber, len );
547 tag = ber_peek_tag( ber, &len ); /* Sequence: Subject DN */
549 len = ber_ptrlen( ber );
550 dn->bv_val = cert->bv_val + len;
551 dn->bv_len = cert->bv_len - len;
555 tlsg_session_my_dn( tls_session *session, struct berval *der_dn )
557 tlsg_session *s = (tlsg_session *)session;
558 const gnutls_datum_t *x;
561 x = gnutls_certificate_get_ours( s->session );
563 if (!x) return LDAP_INVALID_CREDENTIALS;
565 bv.bv_val = (char *) x->data;
568 tlsg_x509_cert_dn( &bv, der_dn, 1 );
573 tlsg_session_peer_dn( tls_session *session, struct berval *der_dn )
575 tlsg_session *s = (tlsg_session *)session;
576 if ( !s->peer_der_dn.bv_val ) {
577 const gnutls_datum_t *peer_cert_list;
578 unsigned int list_size;
581 peer_cert_list = gnutls_certificate_get_peers( s->session,
583 if ( !peer_cert_list ) return LDAP_INVALID_CREDENTIALS;
585 bv.bv_len = peer_cert_list->size;
586 bv.bv_val = (char *) peer_cert_list->data;
588 tlsg_x509_cert_dn( &bv, &s->peer_der_dn, 1 );
590 *der_dn = s->peer_der_dn;
594 /* what kind of hostname were we given? */
599 #define CN_OID "2.5.4.3"
602 tlsg_session_chkhost( LDAP *ld, tls_session *session, const char *name_in )
604 tlsg_session *s = (tlsg_session *)session;
606 const gnutls_datum_t *peer_cert_list;
607 unsigned int list_size;
608 char altname[NI_MAXHOST];
611 gnutls_x509_crt_t cert;
616 struct in6_addr addr;
620 int len1 = 0, len2 = 0;
623 if( ldap_int_hostname &&
624 ( !name_in || !strcasecmp( name_in, "localhost" ) ) )
626 name = ldap_int_hostname;
631 peer_cert_list = gnutls_certificate_get_peers( s->session,
633 if ( !peer_cert_list ) {
634 Debug( LDAP_DEBUG_ANY,
635 "TLS: unable to get peer certificate.\n",
637 /* If this was a fatal condition, things would have
638 * aborted long before now.
642 ret = gnutls_x509_crt_init( &cert );
644 return LDAP_LOCAL_ERROR;
645 ret = gnutls_x509_crt_import( cert, peer_cert_list, GNUTLS_X509_FMT_DER );
647 gnutls_x509_crt_deinit( cert );
648 return LDAP_LOCAL_ERROR;
652 if (name[0] == '[' && strchr(name, ']')) {
653 char *n2 = ldap_strdup(name+1);
654 *strchr(n2, ']') = 0;
655 if (inet_pton(AF_INET6, n2, &addr))
660 if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
661 if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
664 if (ntype == IS_DNS) {
666 domain = strchr(name, '.');
668 len2 = len1 - (domain-name);
672 for ( i=0, ret=0; ret >= 0; i++ ) {
673 altnamesize = sizeof(altname);
674 ret = gnutls_x509_crt_get_subject_alt_name( cert, i,
675 altname, &altnamesize, NULL );
676 if ( ret < 0 ) break;
679 if ( altnamesize == 0 ) continue;
681 if ( ret == GNUTLS_SAN_DNSNAME ) {
682 if (ntype != IS_DNS) continue;
684 /* Is this an exact match? */
685 if ((len1 == altnamesize) && !strncasecmp(name, altname, len1)) {
689 /* Is this a wildcard match? */
690 if (domain && (altname[0] == '*') && (altname[1] == '.') &&
691 (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2))
695 } else if ( ret == GNUTLS_SAN_IPADDRESS ) {
696 if (ntype == IS_DNS) continue;
699 if (ntype == IS_IP6 && altnamesize != sizeof(struct in6_addr)) {
703 if (ntype == IS_IP4 && altnamesize != sizeof(struct in_addr)) {
706 if (!memcmp(altname, &addr, altnamesize)) {
714 /* find the last CN */
718 ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
719 i, 1, altname, &altnamesize );
720 if ( ret == GNUTLS_E_SHORT_MEMORY_BUFFER )
727 altnamesize = sizeof(altname);
728 ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
729 i-1, 0, altname, &altnamesize );
733 Debug( LDAP_DEBUG_ANY,
734 "TLS: unable to get common name from peer certificate.\n",
736 ret = LDAP_CONNECT_ERROR;
737 if ( ld->ld_error ) {
738 LDAP_FREE( ld->ld_error );
740 ld->ld_error = LDAP_STRDUP(
741 _("TLS: unable to get CN from peer certificate"));
744 ret = LDAP_LOCAL_ERROR;
745 if ( !len1 ) len1 = strlen( name );
746 if ( len1 == altnamesize && strncasecmp(name, altname, altnamesize) == 0 ) {
749 } else if (( altname[0] == '*' ) && ( altname[1] == '.' )) {
750 /* Is this a wildcard match? */
752 (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2)) {
758 if( ret == LDAP_LOCAL_ERROR ) {
759 altname[altnamesize] = '\0';
760 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
761 "common name in certificate (%s).\n",
763 ret = LDAP_CONNECT_ERROR;
764 if ( ld->ld_error ) {
765 LDAP_FREE( ld->ld_error );
767 ld->ld_error = LDAP_STRDUP(
768 _("TLS: hostname does not match CN in peer certificate"));
771 gnutls_x509_crt_deinit( cert );
776 tlsg_session_strength( tls_session *session )
778 tlsg_session *s = (tlsg_session *)session;
779 gnutls_cipher_algorithm_t c;
781 c = gnutls_cipher_get( s->session );
782 return gnutls_cipher_get_key_size( c ) * 8;
785 /* suites is a string of colon-separated cipher suite names. */
787 tlsg_parse_ciphers( tlsg_ctx *ctx, char *suites )
789 #ifdef HAVE_CIPHERSUITES
791 return gnutls_priority_init( &ctx->prios, suites, &err );
795 int *list, nkx = 0, ncipher = 0, nmac = 0;
796 int *kx, *cipher, *mac;
801 end = strchr(ptr, ':');
806 for (i=0; i<tlsg_n_ciphers; i++) {
807 if ( !strncasecmp( tlsg_ciphers[i].name, ptr, len )) {
812 if ( i == tlsg_n_ciphers ) {
813 /* unrecognized cipher suite */
819 /* Space for all 3 lists */
820 list = LDAP_MALLOC( (num+1) * sizeof(int) * 3 );
829 end = strchr(ptr, ':');
834 for (i=0; i<tlsg_n_ciphers; i++) {
835 /* For each cipher suite, insert its algorithms into
836 * their respective priority lists. Make sure they
837 * only appear once in each list.
839 if ( !strncasecmp( tlsg_ciphers[i].name, ptr, len )) {
840 for (j=0; j<nkx; j++)
841 if ( kx[j] == tlsg_ciphers[i].kx )
844 kx[nkx++] = tlsg_ciphers[i].kx;
845 for (j=0; j<ncipher; j++)
846 if ( cipher[j] == tlsg_ciphers[i].cipher )
849 cipher[ncipher++] = tlsg_ciphers[i].cipher;
850 for (j=0; j<nmac; j++)
851 if ( mac[j] == tlsg_ciphers[i].mac )
854 mac[nmac++] = tlsg_ciphers[i].mac;
864 ctx->cipher_list = cipher;
871 * TLS support for LBER Sockbufs
875 tlsg_session *session;
876 Sockbuf_IO_Desc *sbiod;
880 tlsg_recv( gnutls_transport_ptr_t ptr, void *buf, size_t len )
884 if ( buf == NULL || len <= 0 ) return 0;
886 p = (struct tls_data *)ptr;
888 if ( p == NULL || p->sbiod == NULL ) {
892 return LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
896 tlsg_send( gnutls_transport_ptr_t ptr, const void *buf, size_t len )
900 if ( buf == NULL || len <= 0 ) return 0;
902 p = (struct tls_data *)ptr;
904 if ( p == NULL || p->sbiod == NULL ) {
908 return LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
912 tlsg_sb_setup( Sockbuf_IO_Desc *sbiod, void *arg )
915 tlsg_session *session = arg;
917 assert( sbiod != NULL );
919 p = LBER_MALLOC( sizeof( *p ) );
924 gnutls_transport_set_ptr( session->session, (gnutls_transport_ptr)p );
925 gnutls_transport_set_pull_function( session->session, tlsg_recv );
926 gnutls_transport_set_push_function( session->session, tlsg_send );
927 p->session = session;
929 sbiod->sbiod_pvt = p;
934 tlsg_sb_remove( Sockbuf_IO_Desc *sbiod )
938 assert( sbiod != NULL );
939 assert( sbiod->sbiod_pvt != NULL );
941 p = (struct tls_data *)sbiod->sbiod_pvt;
942 gnutls_deinit ( p->session->session );
943 LBER_FREE( p->session );
944 LBER_FREE( sbiod->sbiod_pvt );
945 sbiod->sbiod_pvt = NULL;
950 tlsg_sb_close( Sockbuf_IO_Desc *sbiod )
954 assert( sbiod != NULL );
955 assert( sbiod->sbiod_pvt != NULL );
957 p = (struct tls_data *)sbiod->sbiod_pvt;
958 gnutls_bye ( p->session->session, GNUTLS_SHUT_WR );
963 tlsg_sb_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
967 assert( sbiod != NULL );
968 assert( sbiod->sbiod_pvt != NULL );
970 p = (struct tls_data *)sbiod->sbiod_pvt;
972 if ( opt == LBER_SB_OPT_GET_SSL ) {
973 *((tlsg_session **)arg) = p->session;
976 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
977 if( gnutls_record_check_pending( p->session->session ) > 0 ) {
982 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
986 tlsg_sb_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
991 assert( sbiod != NULL );
992 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
994 p = (struct tls_data *)sbiod->sbiod_pvt;
996 ret = gnutls_record_recv ( p->session->session, buf, len );
998 case GNUTLS_E_INTERRUPTED:
1000 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1001 sock_errset(EWOULDBLOCK);
1004 case GNUTLS_E_REHANDSHAKE:
1005 for ( ret = gnutls_handshake ( p->session->session );
1006 ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN;
1007 ret = gnutls_handshake ( p->session->session ) );
1008 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1012 sbiod->sbiod_sb->sb_trans_needs_read = 0;
1018 tlsg_sb_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1023 assert( sbiod != NULL );
1024 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1026 p = (struct tls_data *)sbiod->sbiod_pvt;
1028 ret = gnutls_record_send ( p->session->session, (char *)buf, len );
1030 if ( ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN ) {
1031 sbiod->sbiod_sb->sb_trans_needs_write = 1;
1032 sock_errset(EWOULDBLOCK);
1035 sbiod->sbiod_sb->sb_trans_needs_write = 0;
1040 static Sockbuf_IO tlsg_sbio =
1042 tlsg_sb_setup, /* sbi_setup */
1043 tlsg_sb_remove, /* sbi_remove */
1044 tlsg_sb_ctrl, /* sbi_ctrl */
1045 tlsg_sb_read, /* sbi_read */
1046 tlsg_sb_write, /* sbi_write */
1047 tlsg_sb_close /* sbi_close */
1050 /* Certs are not automatically varified during the handshake */
1052 tlsg_cert_verify( tlsg_session *ssl )
1054 unsigned int status = 0;
1056 time_t now = time(0);
1059 err = gnutls_certificate_verify_peers2( ssl->session, &status );
1061 Debug( LDAP_DEBUG_ANY,"TLS: gnutls_certificate_verify_peers2 failed %d\n",
1066 Debug( LDAP_DEBUG_TRACE,"TLS: peer cert untrusted or revoked (0x%x)\n",
1070 peertime = gnutls_certificate_expiration_time_peers( ssl->session );
1071 if ( peertime == (time_t) -1 ) {
1072 Debug( LDAP_DEBUG_ANY, "TLS: gnutls_certificate_expiration_time_peers failed\n",
1076 if ( peertime < now ) {
1077 Debug( LDAP_DEBUG_ANY, "TLS: peer certificate is expired\n",
1081 peertime = gnutls_certificate_activation_time_peers( ssl->session );
1082 if ( peertime == (time_t) -1 ) {
1083 Debug( LDAP_DEBUG_ANY, "TLS: gnutls_certificate_activation_time_peers failed\n",
1087 if ( peertime > now ) {
1088 Debug( LDAP_DEBUG_ANY, "TLS: peer certificate not yet active\n",
1095 tls_impl ldap_int_tls_impl = {
1107 tlsg_session_connect,
1108 tlsg_session_accept,
1109 tlsg_session_upflags,
1110 tlsg_session_errmsg,
1112 tlsg_session_peer_dn,
1113 tlsg_session_chkhost,
1114 tlsg_session_strength,
1118 #ifdef LDAP_R_COMPILE
1127 #endif /* HAVE_GNUTLS */