diff options
Diffstat (limited to 'libraries/libldap/tls2.c')
| -rw-r--r-- | libraries/libldap/tls2.c | 1371 |
1 files changed, 1371 insertions, 0 deletions
diff --git a/libraries/libldap/tls2.c b/libraries/libldap/tls2.c new file mode 100644 index 0000000..d25c190 --- /dev/null +++ b/libraries/libldap/tls2.c @@ -0,0 +1,1371 @@ +/* tls.c - Handle tls/ssl. */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2018 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 + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENTS: restructured by Howard Chu. + */ + +#include "portable.h" +#include "ldap_config.h" + +#include <stdio.h> + +#include <ac/stdlib.h> +#include <ac/errno.h> +#include <ac/socket.h> +#include <ac/string.h> +#include <ac/ctype.h> +#include <ac/time.h> +#include <ac/unistd.h> +#include <ac/param.h> +#include <ac/dirent.h> + +#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_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 ); + } +#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 ); +#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_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 ? 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 ? 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 ? 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 ? 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 ? 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 ? 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 ? 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 ? 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; +#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 + */ + if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) { + 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 */ + 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 ); + } + } + } + if ( 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; bits<maxBits; bits++) { + if (0x80 & byte) + *tmpStr='1'; + else + *tmpStr='0'; + tmpStr++; + byte<<=1; + } + valPtr++; + valLen--; + } + *tmpStr++ ='\''; + *tmpStr++ ='B'; + *tmpStr=0; + + return LDAP_SUCCESS; +} + +/* Convert a structured DN from an X.509 certificate into an LDAPV3 DN. + * x509_name must be raw DER. If func is non-NULL, the + * constructed DN will use numeric OIDs to identify attributeTypes, + * and the func() will be invoked to rewrite the DN with the given + * flags. + * + * Otherwise the DN will use shortNames from a hardcoded table. + */ +int +ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func, + unsigned flags ) +{ + LDAPDN newDN; + LDAPRDN newRDN; + LDAPAVA *newAVA, *baseAVA; + BerElementBuffer berbuf; + BerElement *ber = (BerElement *)&berbuf; + char oids[8192], *oidptr = oids, *oidbuf = NULL; + void *ptrs[2048]; + char *dn_end, *rdn_end; + int i, navas, nrdns, rc = LDAP_SUCCESS; + size_t dnsize, oidrem = sizeof(oids), oidsize = 0; + int csize; + ber_tag_t tag; + ber_len_t len; + oid_name *oidname; + + struct berval Oid, Val, oid2, *in = x509_name; + + assert( bv != NULL ); + + bv->bv_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; +} + |