/* $NetBSD: tls2.c,v 1.1.1.5.6.1 2019/08/10 06:17:14 martin Exp $ */ /* tls.c - Handle tls/ssl. */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2019 The OpenLDAP Foundation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /* ACKNOWLEDGEMENTS: restructured by Howard Chu. */ #include __RCSID("$NetBSD: tls2.c,v 1.1.1.5.6.1 2019/08/10 06:17:14 martin Exp $"); #include "portable.h" #include "ldap_config.h" #include #include #include #include #include #include #include #include #include #include #include "ldap-int.h" #ifdef HAVE_TLS #include "ldap-tls.h" static tls_impl *tls_imp = &ldap_int_tls_impl; #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \ (void *)tls_imp->ti_sbio ) #endif /* HAVE_TLS */ #ifdef LDAP_DEVEL #define LDAP_USE_NON_BLOCKING_TLS #endif /* LDAP_DEVEL */ /* RFC2459 minimum required set of supported attribute types * in a certificate DN */ typedef struct oid_name { struct berval oid; struct berval name; } oid_name; static oid_name oids[] = { { BER_BVC("2.5.4.3"), BER_BVC("cn") }, { BER_BVC("2.5.4.4"), BER_BVC("sn") }, { BER_BVC("2.5.4.6"), BER_BVC("c") }, { BER_BVC("2.5.4.7"), BER_BVC("l") }, { BER_BVC("2.5.4.8"), BER_BVC("st") }, { BER_BVC("2.5.4.10"), BER_BVC("o") }, { BER_BVC("2.5.4.11"), BER_BVC("ou") }, { BER_BVC("2.5.4.12"), BER_BVC("title") }, { BER_BVC("2.5.4.41"), BER_BVC("name") }, { BER_BVC("2.5.4.42"), BER_BVC("givenName") }, { BER_BVC("2.5.4.43"), BER_BVC("initials") }, { BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") }, { BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") }, { BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") }, { BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") }, { BER_BVNULL, BER_BVNULL } }; #ifdef HAVE_TLS void ldap_pvt_tls_ctx_free ( void *c ) { if ( !c ) return; tls_imp->ti_ctx_free( c ); } static void tls_ctx_ref( tls_ctx *ctx ) { if ( !ctx ) return; tls_imp->ti_ctx_ref( ctx ); } #ifdef LDAP_R_COMPILE /* * an extra mutex for the default ctx. */ static ldap_pvt_thread_mutex_t tls_def_ctx_mutex; #endif void ldap_int_tls_destroy( struct ldapoptions *lo ) { if ( lo->ldo_tls_ctx ) { ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); lo->ldo_tls_ctx = NULL; } if ( lo->ldo_tls_certfile ) { LDAP_FREE( lo->ldo_tls_certfile ); lo->ldo_tls_certfile = NULL; } if ( lo->ldo_tls_keyfile ) { LDAP_FREE( lo->ldo_tls_keyfile ); lo->ldo_tls_keyfile = NULL; } if ( lo->ldo_tls_dhfile ) { LDAP_FREE( lo->ldo_tls_dhfile ); lo->ldo_tls_dhfile = NULL; } if ( lo->ldo_tls_ecname ) { LDAP_FREE( lo->ldo_tls_ecname ); lo->ldo_tls_ecname = NULL; } if ( lo->ldo_tls_cacertfile ) { LDAP_FREE( lo->ldo_tls_cacertfile ); lo->ldo_tls_cacertfile = NULL; } if ( lo->ldo_tls_cacertdir ) { LDAP_FREE( lo->ldo_tls_cacertdir ); lo->ldo_tls_cacertdir = NULL; } if ( lo->ldo_tls_ciphersuite ) { LDAP_FREE( lo->ldo_tls_ciphersuite ); lo->ldo_tls_ciphersuite = NULL; } if ( lo->ldo_tls_crlfile ) { LDAP_FREE( lo->ldo_tls_crlfile ); lo->ldo_tls_crlfile = NULL; } } /* * Tear down the TLS subsystem. Should only be called once. */ void ldap_pvt_tls_destroy( void ) { struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT(); ldap_int_tls_destroy( lo ); tls_imp->ti_tls_destroy(); } /* * Initialize a particular TLS implementation. * Called once per implementation. */ static int tls_init(tls_impl *impl ) { static int tls_initialized = 0; if ( !tls_initialized++ ) { #ifdef LDAP_R_COMPILE ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex ); #endif } if ( impl->ti_inited++ ) return 0; #ifdef LDAP_R_COMPILE impl->ti_thr_init(); #endif return impl->ti_tls_init(); } /* * Initialize TLS subsystem. Called once per implementation. */ int ldap_pvt_tls_init( void ) { return tls_init( tls_imp ); } /* * initialize a new TLS context */ static int ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server ) { int rc = 0; tls_impl *ti = tls_imp; struct ldaptls lts = lo->ldo_tls_info; if ( lo->ldo_tls_ctx ) return 0; tls_init( ti ); if ( is_server && !lts.lt_certfile && !lts.lt_keyfile && !lts.lt_cacertfile && !lts.lt_cacertdir ) { /* minimum configuration not provided */ return LDAP_NOT_SUPPORTED; } #ifdef HAVE_EBCDIC /* This ASCII/EBCDIC handling is a real pain! */ if ( lts.lt_ciphersuite ) { lts.lt_ciphersuite = LDAP_STRDUP( lts.lt_ciphersuite ); __atoe( lts.lt_ciphersuite ); } if ( lts.lt_cacertfile ) { lts.lt_cacertfile = LDAP_STRDUP( lts.lt_cacertfile ); __atoe( lts.lt_cacertfile ); } if ( lts.lt_certfile ) { lts.lt_certfile = LDAP_STRDUP( lts.lt_certfile ); __atoe( lts.lt_certfile ); } if ( lts.lt_keyfile ) { lts.lt_keyfile = LDAP_STRDUP( lts.lt_keyfile ); __atoe( lts.lt_keyfile ); } if ( lts.lt_crlfile ) { lts.lt_crlfile = LDAP_STRDUP( lts.lt_crlfile ); __atoe( lts.lt_crlfile ); } if ( lts.lt_cacertdir ) { lts.lt_cacertdir = LDAP_STRDUP( lts.lt_cacertdir ); __atoe( lts.lt_cacertdir ); } if ( lts.lt_dhfile ) { lts.lt_dhfile = LDAP_STRDUP( lts.lt_dhfile ); __atoe( lts.lt_dhfile ); } if ( lts.lt_ecname ) { lts.lt_ecname = LDAP_STRDUP( lts.lt_ecname ); __atoe( lts.lt_ecname ); } #endif lo->ldo_tls_ctx = ti->ti_ctx_new( lo ); if ( lo->ldo_tls_ctx == NULL ) { Debug( LDAP_DEBUG_ANY, "TLS: could not allocate default ctx.\n", 0,0,0); rc = -1; goto error_exit; } rc = ti->ti_ctx_init( lo, <s, is_server ); error_exit: if ( rc < 0 && lo->ldo_tls_ctx != NULL ) { ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); lo->ldo_tls_ctx = NULL; } #ifdef HAVE_EBCDIC LDAP_FREE( lts.lt_ciphersuite ); LDAP_FREE( lts.lt_cacertfile ); LDAP_FREE( lts.lt_certfile ); LDAP_FREE( lts.lt_keyfile ); LDAP_FREE( lts.lt_crlfile ); LDAP_FREE( lts.lt_cacertdir ); LDAP_FREE( lts.lt_dhfile ); LDAP_FREE( lts.lt_ecname ); #endif return rc; } /* * initialize the default context */ int ldap_pvt_tls_init_def_ctx( int is_server ) { struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT(); int rc; LDAP_MUTEX_LOCK( &tls_def_ctx_mutex ); rc = ldap_int_tls_init_ctx( lo, is_server ); LDAP_MUTEX_UNLOCK( &tls_def_ctx_mutex ); return rc; } static tls_session * alloc_handle( void *ctx_arg, int is_server ) { tls_ctx *ctx; tls_session *ssl; if ( ctx_arg ) { ctx = ctx_arg; } else { struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT(); if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL; ctx = lo->ldo_tls_ctx; } ssl = tls_imp->ti_session_new( ctx, is_server ); if ( ssl == NULL ) { Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0); return NULL; } return ssl; } static int update_flags( Sockbuf *sb, tls_session * ssl, int rc ) { sb->sb_trans_needs_read = 0; sb->sb_trans_needs_write = 0; return tls_imp->ti_session_upflags( sb, ssl, rc ); } /* * Call this to do a TLS connect on a sockbuf. ctx_arg can be * a SSL_CTX * or NULL, in which case the default ctx is used. * * Return value: * * 0 - Success. Connection is ready for communication. * <0 - Error. Can't create a TLS stream. * >0 - Partial success. * Do a select (using information from lber_pvt_sb_needs_{read,write} * and call again. */ static int ldap_int_tls_connect( LDAP *ld, LDAPConn *conn, const char *host ) { Sockbuf *sb = conn->lconn_sb; int err; tls_session *ssl = NULL; if ( HAS_TLS( sb )) { ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl ); } else { struct ldapoptions *lo; tls_ctx *ctx; ctx = ld->ld_options.ldo_tls_ctx; ssl = alloc_handle( ctx, 0 ); if ( ssl == NULL ) return -1; #ifdef LDAP_DEBUG ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" ); #endif ber_sockbuf_add_io( sb, tls_imp->ti_sbio, LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl ); lo = LDAP_INT_GLOBAL_OPT(); if( ctx == NULL ) { ctx = lo->ldo_tls_ctx; ld->ld_options.ldo_tls_ctx = ctx; tls_ctx_ref( ctx ); } if ( ld->ld_options.ldo_tls_connect_cb ) ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx, ld->ld_options.ldo_tls_connect_arg ); if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb != ld->ld_options.ldo_tls_connect_cb ) lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg ); } err = tls_imp->ti_session_connect( ld, ssl ); #ifdef HAVE_WINSOCK errno = WSAGetLastError(); #endif if ( err == 0 ) { err = ldap_pvt_tls_check_hostname( ld, ssl, host ); } if ( err < 0 ) { char buf[256], *msg; if ( update_flags( sb, ssl, err )) { return 1; } msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) ); if ( msg ) { if ( ld->ld_error ) { LDAP_FREE( ld->ld_error ); } ld->ld_error = LDAP_STRDUP( msg ); #ifdef HAVE_EBCDIC if ( ld->ld_error ) __etoa(ld->ld_error); #endif } Debug( LDAP_DEBUG_ANY,"TLS: can't connect: %s.\n", ld->ld_error ? ld->ld_error : "" ,0,0); ber_sockbuf_remove_io( sb, tls_imp->ti_sbio, LBER_SBIOD_LEVEL_TRANSPORT ); #ifdef LDAP_DEBUG ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, LBER_SBIOD_LEVEL_TRANSPORT ); #endif return -1; } return 0; } /* * Call this to do a TLS accept on a sockbuf. * Everything else is the same as with tls_connect. */ int ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg ) { int err; tls_session *ssl = NULL; if ( HAS_TLS( sb )) { ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl ); } else { ssl = alloc_handle( ctx_arg, 1 ); if ( ssl == NULL ) return -1; #ifdef LDAP_DEBUG ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" ); #endif ber_sockbuf_add_io( sb, tls_imp->ti_sbio, LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl ); } err = tls_imp->ti_session_accept( ssl ); #ifdef HAVE_WINSOCK errno = WSAGetLastError(); #endif if ( err < 0 ) { if ( update_flags( sb, ssl, err )) return 1; if ( DebugTest( LDAP_DEBUG_ANY ) ) { char buf[256], *msg; msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) ); Debug( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n", msg ? msg : "(unknown)", 0, 0 ); } ber_sockbuf_remove_io( sb, tls_imp->ti_sbio, LBER_SBIOD_LEVEL_TRANSPORT ); #ifdef LDAP_DEBUG ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, LBER_SBIOD_LEVEL_TRANSPORT ); #endif return -1; } return 0; } int ldap_pvt_tls_inplace ( Sockbuf *sb ) { return HAS_TLS( sb ) ? 1 : 0; } int ldap_tls_inplace( LDAP *ld ) { Sockbuf *sb = NULL; if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) { sb = ld->ld_defconn->lconn_sb; } else if ( ld->ld_sb ) { sb = ld->ld_sb; } else { return 0; } return ldap_pvt_tls_inplace( sb ); } int ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags ) { tls_session *session = s; struct berval bvdn; int rc; rc = tls_imp->ti_session_peer_dn( session, &bvdn ); if ( rc ) return rc; rc = ldap_X509dn2bv( &bvdn, dn, (LDAPDN_rewrite_func *)func, flags); return rc; } int ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in ) { tls_session *session = s; if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER && ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW) { ld->ld_errno = tls_imp->ti_session_chkhost( ld, session, name_in ); if (ld->ld_errno != LDAP_SUCCESS) { return ld->ld_errno; } } return LDAP_SUCCESS; } int ldap_int_tls_config( LDAP *ld, int option, const char *arg ) { int i; switch( option ) { case LDAP_OPT_X_TLS_CACERTFILE: case LDAP_OPT_X_TLS_CACERTDIR: case LDAP_OPT_X_TLS_CERTFILE: case LDAP_OPT_X_TLS_KEYFILE: case LDAP_OPT_X_TLS_RANDOM_FILE: case LDAP_OPT_X_TLS_CIPHER_SUITE: case LDAP_OPT_X_TLS_DHFILE: case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */ return ldap_pvt_tls_set_option( ld, option, (void *) arg ); case LDAP_OPT_X_TLS_REQUIRE_CERT: case LDAP_OPT_X_TLS: i = -1; if ( strcasecmp( arg, "never" ) == 0 ) { i = LDAP_OPT_X_TLS_NEVER ; } else if ( strcasecmp( arg, "demand" ) == 0 ) { i = LDAP_OPT_X_TLS_DEMAND ; } else if ( strcasecmp( arg, "allow" ) == 0 ) { i = LDAP_OPT_X_TLS_ALLOW ; } else if ( strcasecmp( arg, "try" ) == 0 ) { i = LDAP_OPT_X_TLS_TRY ; } else if ( ( strcasecmp( arg, "hard" ) == 0 ) || ( strcasecmp( arg, "on" ) == 0 ) || ( strcasecmp( arg, "yes" ) == 0) || ( strcasecmp( arg, "true" ) == 0 ) ) { i = LDAP_OPT_X_TLS_HARD ; } if (i >= 0) { return ldap_pvt_tls_set_option( ld, option, &i ); } return -1; case LDAP_OPT_X_TLS_PROTOCOL_MIN: { char *next; long l; l = strtol( arg, &next, 10 ); if ( l < 0 || l > 0xff || next == arg || ( *next != '\0' && *next != '.' ) ) return -1; i = l << 8; if (*next == '.') { arg = next + 1; l = strtol( arg, &next, 10 ); if ( l < 0 || l > 0xff || next == arg || *next != '\0' ) return -1; i += l; } return ldap_pvt_tls_set_option( ld, option, &i ); } #ifdef HAVE_OPENSSL_CRL case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */ i = -1; if ( strcasecmp( arg, "none" ) == 0 ) { i = LDAP_OPT_X_TLS_CRL_NONE ; } else if ( strcasecmp( arg, "peer" ) == 0 ) { i = LDAP_OPT_X_TLS_CRL_PEER ; } else if ( strcasecmp( arg, "all" ) == 0 ) { i = LDAP_OPT_X_TLS_CRL_ALL ; } if (i >= 0) { return ldap_pvt_tls_set_option( ld, option, &i ); } return -1; #endif } return -1; } int ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg ) { struct ldapoptions *lo; if( option == LDAP_OPT_X_TLS_PACKAGE ) { *(char **)arg = LDAP_STRDUP( tls_imp->ti_name ); return 0; } if( ld != NULL ) { assert( LDAP_VALID( ld ) ); if( !LDAP_VALID( ld ) ) { return LDAP_OPT_ERROR; } lo = &ld->ld_options; } else { /* Get pointer to global option structure */ lo = LDAP_INT_GLOBAL_OPT(); if ( lo == NULL ) { return LDAP_NO_MEMORY; } } switch( option ) { case LDAP_OPT_X_TLS: *(int *)arg = lo->ldo_tls_mode; break; case LDAP_OPT_X_TLS_CTX: *(void **)arg = lo->ldo_tls_ctx; if ( lo->ldo_tls_ctx ) { tls_ctx_ref( lo->ldo_tls_ctx ); } break; case LDAP_OPT_X_TLS_CACERTFILE: *(char **)arg = lo->ldo_tls_cacertfile ? LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL; break; case LDAP_OPT_X_TLS_CACERTDIR: *(char **)arg = lo->ldo_tls_cacertdir ? LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL; break; case LDAP_OPT_X_TLS_CERTFILE: *(char **)arg = lo->ldo_tls_certfile ? LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL; break; case LDAP_OPT_X_TLS_KEYFILE: *(char **)arg = lo->ldo_tls_keyfile ? LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL; break; case LDAP_OPT_X_TLS_DHFILE: *(char **)arg = lo->ldo_tls_dhfile ? LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL; break; case LDAP_OPT_X_TLS_ECNAME: *(char **)arg = lo->ldo_tls_ecname ? LDAP_STRDUP( lo->ldo_tls_ecname ) : NULL; break; case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */ *(char **)arg = lo->ldo_tls_crlfile ? LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL; break; case LDAP_OPT_X_TLS_REQUIRE_CERT: *(int *)arg = lo->ldo_tls_require_cert; break; #ifdef HAVE_OPENSSL_CRL case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */ *(int *)arg = lo->ldo_tls_crlcheck; break; #endif case LDAP_OPT_X_TLS_CIPHER_SUITE: *(char **)arg = lo->ldo_tls_ciphersuite ? LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL; break; case LDAP_OPT_X_TLS_PROTOCOL_MIN: *(int *)arg = lo->ldo_tls_protocol_min; break; case LDAP_OPT_X_TLS_RANDOM_FILE: *(char **)arg = lo->ldo_tls_randfile ? LDAP_STRDUP( lo->ldo_tls_randfile ) : NULL; break; case LDAP_OPT_X_TLS_SSL_CTX: { void *retval = 0; if ( ld != NULL ) { LDAPConn *conn = ld->ld_defconn; if ( conn != NULL ) { Sockbuf *sb = conn->lconn_sb; retval = ldap_pvt_tls_sb_ctx( sb ); } } *(void **)arg = retval; break; } case LDAP_OPT_X_TLS_CONNECT_CB: *(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb; break; case LDAP_OPT_X_TLS_CONNECT_ARG: *(void **)arg = lo->ldo_tls_connect_arg; break; default: return -1; } return 0; } int ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg ) { struct ldapoptions *lo; if( ld != NULL ) { assert( LDAP_VALID( ld ) ); if( !LDAP_VALID( ld ) ) { return LDAP_OPT_ERROR; } lo = &ld->ld_options; } else { /* Get pointer to global option structure */ lo = LDAP_INT_GLOBAL_OPT(); if ( lo == NULL ) { return LDAP_NO_MEMORY; } } switch( option ) { case LDAP_OPT_X_TLS: if ( !arg ) return -1; switch( *(int *) arg ) { case LDAP_OPT_X_TLS_NEVER: case LDAP_OPT_X_TLS_DEMAND: case LDAP_OPT_X_TLS_ALLOW: case LDAP_OPT_X_TLS_TRY: case LDAP_OPT_X_TLS_HARD: if (lo != NULL) { lo->ldo_tls_mode = *(int *)arg; } return 0; } return -1; case LDAP_OPT_X_TLS_CTX: if ( lo->ldo_tls_ctx ) ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); lo->ldo_tls_ctx = arg; tls_ctx_ref( lo->ldo_tls_ctx ); return 0; case LDAP_OPT_X_TLS_CONNECT_CB: lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg; return 0; case LDAP_OPT_X_TLS_CONNECT_ARG: lo->ldo_tls_connect_arg = arg; return 0; case LDAP_OPT_X_TLS_CACERTFILE: if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile ); lo->ldo_tls_cacertfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_CACERTDIR: if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir ); lo->ldo_tls_cacertdir = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_CERTFILE: if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile ); lo->ldo_tls_certfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_KEYFILE: if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile ); lo->ldo_tls_keyfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_DHFILE: if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile ); lo->ldo_tls_dhfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_ECNAME: if ( lo->ldo_tls_ecname ) LDAP_FREE( lo->ldo_tls_ecname ); lo->ldo_tls_ecname = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */ if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile ); lo->ldo_tls_crlfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_REQUIRE_CERT: if ( !arg ) return -1; switch( *(int *) arg ) { case LDAP_OPT_X_TLS_NEVER: case LDAP_OPT_X_TLS_DEMAND: case LDAP_OPT_X_TLS_ALLOW: case LDAP_OPT_X_TLS_TRY: case LDAP_OPT_X_TLS_HARD: lo->ldo_tls_require_cert = * (int *) arg; return 0; } return -1; #ifdef HAVE_OPENSSL_CRL case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */ if ( !arg ) return -1; switch( *(int *) arg ) { case LDAP_OPT_X_TLS_CRL_NONE: case LDAP_OPT_X_TLS_CRL_PEER: case LDAP_OPT_X_TLS_CRL_ALL: lo->ldo_tls_crlcheck = * (int *) arg; return 0; } return -1; #endif case LDAP_OPT_X_TLS_CIPHER_SUITE: if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite ); lo->ldo_tls_ciphersuite = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; return 0; case LDAP_OPT_X_TLS_PROTOCOL_MIN: if ( !arg ) return -1; lo->ldo_tls_protocol_min = *(int *)arg; return 0; case LDAP_OPT_X_TLS_RANDOM_FILE: if ( ld != NULL ) return -1; if ( lo->ldo_tls_randfile ) LDAP_FREE (lo->ldo_tls_randfile ); lo->ldo_tls_randfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL; break; case LDAP_OPT_X_TLS_NEWCTX: if ( !arg ) return -1; if ( lo->ldo_tls_ctx ) ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx ); lo->ldo_tls_ctx = NULL; return ldap_int_tls_init_ctx( lo, *(int *)arg ); default: return -1; } return 0; } int ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv ) { Sockbuf *sb; char *host; void *ssl; int ret, async; #ifdef LDAP_USE_NON_BLOCKING_TLS struct timeval start_time_tv, tv, tv0; ber_socket_t sd = AC_SOCKET_ERROR; #endif /* LDAP_USE_NON_BLOCKING_TLS */ if ( !conn ) return LDAP_PARAM_ERROR; sb = conn->lconn_sb; if( srv ) { host = srv->lud_host; } else { host = conn->lconn_server->lud_host; } /* avoid NULL host */ if( host == NULL ) { host = "localhost"; } (void) tls_init( tls_imp ); #ifdef LDAP_USE_NON_BLOCKING_TLS /* * Use non-blocking io during SSL Handshake when a timeout is configured */ async = LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_CONNECT_ASYNC ); if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) { if ( !async ) { /* if async, this has already been set */ ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, (void*)1 ); } ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd ); tv = ld->ld_options.ldo_tm_net; tv0 = tv; #ifdef HAVE_GETTIMEOFDAY gettimeofday( &start_time_tv, NULL ); #else /* ! HAVE_GETTIMEOFDAY */ time( &start_time_tv.tv_sec ); start_time_tv.tv_usec = 0; #endif /* ! HAVE_GETTIMEOFDAY */ } #endif /* LDAP_USE_NON_BLOCKING_TLS */ ld->ld_errno = LDAP_SUCCESS; ret = ldap_int_tls_connect( ld, conn, host ); #ifdef LDAP_USE_NON_BLOCKING_TLS while ( ret > 0 ) { /* this should only happen for non-blocking io */ int wr=0; if ( sb->sb_trans_needs_read ) { wr=0; } else if ( sb->sb_trans_needs_write ) { wr=1; } Debug( LDAP_DEBUG_TRACE, "ldap_int_tls_start: ldap_int_tls_connect needs %s\n", wr ? "write": "read", 0, 0); ret = ldap_int_poll( ld, sd, &tv, wr); if ( ret < 0 ) { ld->ld_errno = LDAP_TIMEOUT; break; } else { /* ldap_int_poll called ldap_pvt_ndelay_off if not async */ if ( !async ) { ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, (void*)1 ); } ret = ldap_int_tls_connect( ld, conn, host ); if ( ret > 0 ) { /* need to call tls_connect once more */ struct timeval curr_time_tv, delta_tv; /* This is mostly copied from result.c:wait4msg(), should * probably be moved into a separate function */ #ifdef HAVE_GETTIMEOFDAY gettimeofday( &curr_time_tv, NULL ); #else /* ! HAVE_GETTIMEOFDAY */ time( &curr_time_tv.tv_sec ); curr_time_tv.tv_usec = 0; #endif /* ! HAVE_GETTIMEOFDAY */ /* delta = curr - start */ delta_tv.tv_sec = curr_time_tv.tv_sec - start_time_tv.tv_sec; delta_tv.tv_usec = curr_time_tv.tv_usec - start_time_tv.tv_usec; if ( delta_tv.tv_usec < 0 ) { delta_tv.tv_sec--; delta_tv.tv_usec += 1000000; } /* tv0 < delta ? */ if ( ( tv0.tv_sec < delta_tv.tv_sec ) || ( ( tv0.tv_sec == delta_tv.tv_sec ) && ( tv0.tv_usec < delta_tv.tv_usec ) ) ) { ret = -1; ld->ld_errno = LDAP_TIMEOUT; break; } else { /* timeout -= delta_time */ tv0.tv_sec -= delta_tv.tv_sec; tv0.tv_usec -= delta_tv.tv_usec; if ( tv0.tv_usec < 0 ) { tv0.tv_sec--; tv0.tv_usec += 1000000; } start_time_tv.tv_sec = curr_time_tv.tv_sec; start_time_tv.tv_usec = curr_time_tv.tv_usec; } tv = tv0; Debug( LDAP_DEBUG_TRACE, "ldap_int_tls_start: ld %p %ld s %ld us to go\n", (void *)ld, (long) tv.tv_sec, (long) tv.tv_usec ); } } } /* Leave it nonblocking if async */ if ( !async && ld->ld_options.ldo_tm_net.tv_sec >= 0 ) { ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, NULL ); } #endif /* LDAP_USE_NON_BLOCKING_TLS */ if ( ret < 0 ) { if ( ld->ld_errno == LDAP_SUCCESS ) ld->ld_errno = LDAP_CONNECT_ERROR; return (ld->ld_errno); } return LDAP_SUCCESS; } void * ldap_pvt_tls_sb_ctx( Sockbuf *sb ) { void *p = NULL; ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p ); return p; } int ldap_pvt_tls_get_strength( void *s ) { tls_session *session = s; return tls_imp->ti_session_strength( session ); } int ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags ) { tls_session *session = s; struct berval der_dn; int rc; rc = tls_imp->ti_session_my_dn( session, &der_dn ); if ( rc == LDAP_SUCCESS ) rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags ); return rc; } #endif /* HAVE_TLS */ int ldap_start_tls( LDAP *ld, LDAPControl **serverctrls, LDAPControl **clientctrls, int *msgidp ) { return ldap_extended_operation( ld, LDAP_EXOP_START_TLS, NULL, serverctrls, clientctrls, msgidp ); } int ldap_install_tls( LDAP *ld ) { #ifndef HAVE_TLS return LDAP_NOT_SUPPORTED; #else if ( ldap_tls_inplace( ld ) ) { return LDAP_LOCAL_ERROR; } return ldap_int_tls_start( ld, ld->ld_defconn, NULL ); #endif } int ldap_start_tls_s ( LDAP *ld, LDAPControl **serverctrls, LDAPControl **clientctrls ) { #ifndef HAVE_TLS return LDAP_NOT_SUPPORTED; #else int rc; char *rspoid = NULL; struct berval *rspdata = NULL; /* XXYYZ: this initiates operation only on default connection! */ if ( ldap_tls_inplace( ld ) ) { return LDAP_LOCAL_ERROR; } rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS, NULL, serverctrls, clientctrls, &rspoid, &rspdata ); if ( rspoid != NULL ) { LDAP_FREE(rspoid); } if ( rspdata != NULL ) { ber_bvfree( rspdata ); } if ( rc == LDAP_SUCCESS ) { rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL ); } return rc; #endif } /* These tags probably all belong in lber.h, but they're * not normally encountered when processing LDAP, so maybe * they belong somewhere else instead. */ #define LBER_TAG_OID ((ber_tag_t) 0x06UL) /* Tags for string types used in a DirectoryString. * * Note that IA5string is not one of the defined choices for * DirectoryString in X.520, but it gets used for email AVAs. */ #define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL) #define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL) #define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL) #define LBER_TAG_IA5 ((ber_tag_t) 0x16UL) #define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL) #define LBER_TAG_BMP ((ber_tag_t) 0x1eUL) static oid_name * find_oid( struct berval *oid ) { int i; for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) { if ( oids[i].oid.bv_len != oid->bv_len ) continue; if ( !strcmp( oids[i].oid.bv_val, oid->bv_val )) return &oids[i]; } return NULL; } /* Converts BER Bitstring value to LDAP BitString value (RFC4517) * * berValue : IN * rfc4517Value: OUT * * berValue and ldapValue should not be NULL */ #define BITS_PER_BYTE 8 #define SQUOTE_LENGTH 1 #define B_CHAR_LENGTH 1 #define STR_OVERHEAD (2*SQUOTE_LENGTH + B_CHAR_LENGTH) static int der_to_ldap_BitString (struct berval *berValue, struct berval *ldapValue) { ber_len_t bitPadding=0; ber_len_t bits, maxBits; char *tmpStr; unsigned char byte; ber_len_t bitLength; ber_len_t valLen; unsigned char* valPtr; ldapValue->bv_len=0; ldapValue->bv_val=NULL; /* Gets padding and points to binary data */ valLen=berValue->bv_len; valPtr=(unsigned char*)berValue->bv_val; if (valLen) { bitPadding=(ber_len_t)(valPtr[0]); valLen--; valPtr++; } /* If Block is non DER encoding fixes to DER encoding */ if (bitPadding >= BITS_PER_BYTE) { if (valLen*BITS_PER_BYTE > bitPadding ) { valLen-=(bitPadding/BITS_PER_BYTE); bitPadding%=BITS_PER_BYTE; } else { valLen=0; bitPadding=0; } } /* Just in case bad encoding */ if (valLen*BITS_PER_BYTE < bitPadding ) { bitPadding=0; valLen=0; } /* Gets buffer to hold RFC4517 Bit String format */ bitLength=valLen*BITS_PER_BYTE-bitPadding; tmpStr=LDAP_MALLOC(bitLength + STR_OVERHEAD + 1); if (!tmpStr) return LDAP_NO_MEMORY; ldapValue->bv_val=tmpStr; ldapValue->bv_len=bitLength + STR_OVERHEAD; /* Formatting in '*binary-digit'B format */ maxBits=BITS_PER_BYTE; *tmpStr++ ='\''; while(valLen) { byte=*valPtr; if (valLen==1) maxBits-=bitPadding; for (bits=0; bitsbv_len = 0; bv->bv_val = NULL; navas = 0; nrdns = 0; /* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs. * An AVA is a SEQUENCE of attr and value. * Count the number of AVAs and RDNs */ ber_init2( ber, in, LBER_USE_DER ); tag = ber_peek_tag( ber, &len ); if ( tag != LBER_SEQUENCE ) return LDAP_DECODING_ERROR; for ( tag = ber_first_element( ber, &len, &dn_end ); tag == LBER_SET; tag = ber_next_element( ber, &len, dn_end )) { nrdns++; for ( tag = ber_first_element( ber, &len, &rdn_end ); tag == LBER_SEQUENCE; tag = ber_next_element( ber, &len, rdn_end )) { tag = ber_skip_tag( ber, &len ); ber_skip_data( ber, len ); navas++; } } /* Allocate the DN/RDN/AVA stuff as a single block */ dnsize = sizeof(LDAPRDN) * (nrdns+1); dnsize += sizeof(LDAPAVA *) * (navas+nrdns); dnsize += sizeof(LDAPAVA) * navas; if (dnsize > sizeof(ptrs)) { newDN = (LDAPDN)LDAP_MALLOC( dnsize ); if ( newDN == NULL ) return LDAP_NO_MEMORY; } else { newDN = (LDAPDN)(char *)ptrs; } newDN[nrdns] = NULL; newRDN = (LDAPRDN)(newDN + nrdns+1); newAVA = (LDAPAVA *)(newRDN + navas + nrdns); baseAVA = newAVA; /* Rewind and start extracting */ ber_rewind( ber ); tag = ber_first_element( ber, &len, &dn_end ); for ( i = nrdns - 1; i >= 0; i-- ) { newDN[i] = newRDN; for ( tag = ber_first_element( ber, &len, &rdn_end ); tag == LBER_SEQUENCE; tag = ber_next_element( ber, &len, rdn_end )) { *newRDN++ = newAVA; tag = ber_skip_tag( ber, &len ); tag = ber_get_stringbv( ber, &Oid, LBER_BV_NOTERM ); if ( tag != LBER_TAG_OID ) { rc = LDAP_DECODING_ERROR; goto nomem; } oid2.bv_val = oidptr; oid2.bv_len = oidrem; if ( ber_decode_oid( &Oid, &oid2 ) < 0 ) { rc = LDAP_DECODING_ERROR; goto nomem; } oidname = find_oid( &oid2 ); if ( !oidname ) { newAVA->la_attr = oid2; oidptr += oid2.bv_len + 1; oidrem -= oid2.bv_len + 1; /* Running out of OID buffer space? */ if (oidrem < 128) { if ( oidsize == 0 ) { oidsize = sizeof(oids) * 2; oidrem = oidsize; oidbuf = LDAP_MALLOC( oidsize ); if ( oidbuf == NULL ) goto nomem; oidptr = oidbuf; } else { char *old = oidbuf; oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 ); if ( oidbuf == NULL ) goto nomem; /* Buffer moved! Fix AVA pointers */ if ( old != oidbuf ) { LDAPAVA *a; long dif = oidbuf - old; for (a=baseAVA; a<=newAVA; a++){ if (a->la_attr.bv_val >= old && a->la_attr.bv_val <= (old + oidsize)) a->la_attr.bv_val += dif; } } oidptr = oidbuf + oidsize - oidrem; oidrem += oidsize; oidsize *= 2; } } } else { if ( func ) { newAVA->la_attr = oidname->oid; } else { newAVA->la_attr = oidname->name; } } newAVA->la_private = NULL; newAVA->la_flags = LDAP_AVA_STRING; tag = ber_get_stringbv( ber, &Val, LBER_BV_NOTERM ); switch(tag) { case LBER_TAG_UNIVERSAL: /* This uses 32-bit ISO 10646-1 */ csize = 4; goto to_utf8; case LBER_TAG_BMP: /* This uses 16-bit ISO 10646-1 */ csize = 2; goto to_utf8; case LBER_TAG_TELETEX: /* This uses 8-bit, assume ISO 8859-1 */ csize = 1; to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value ); newAVA->la_flags |= LDAP_AVA_NONPRINTABLE; allocd: newAVA->la_flags |= LDAP_AVA_FREE_VALUE; if (rc != LDAP_SUCCESS) goto nomem; break; case LBER_TAG_UTF8: newAVA->la_flags |= LDAP_AVA_NONPRINTABLE; /* This is already in UTF-8 encoding */ case LBER_TAG_IA5: case LBER_TAG_PRINTABLE: /* These are always 7-bit strings */ newAVA->la_value = Val; break; case LBER_BITSTRING: /* X.690 bitString value converted to RFC4517 Bit String */ rc = der_to_ldap_BitString( &Val, &newAVA->la_value ); goto allocd; default: /* Not a string type at all */ newAVA->la_flags = 0; newAVA->la_value = Val; break; } newAVA++; } *newRDN++ = NULL; tag = ber_next_element( ber, &len, dn_end ); } if ( func ) { rc = func( newDN, flags, NULL ); if ( rc != LDAP_SUCCESS ) goto nomem; } rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL ); nomem: for (;baseAVA < newAVA; baseAVA++) { if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR) LDAP_FREE( baseAVA->la_attr.bv_val ); if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE) LDAP_FREE( baseAVA->la_value.bv_val ); } if ( oidsize != 0 ) LDAP_FREE( oidbuf ); if ( newDN != (LDAPDN)(char *) ptrs ) LDAP_FREE( newDN ); return rc; }