X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fbind.c;h=91fe75896155b8bc55f4ab4cd8a32395d5bcebc7;hb=2ece0ee378a47df99a05a0dd0db3763bdf9bb125;hp=29abd7869e58c45dd55980d48ea7cbb62165eff1;hpb=e2a15115b010b74ed5baf589614873994d9c36ec;p=openldap diff --git a/servers/slapd/bind.c b/servers/slapd/bind.c index 29abd7869e..91fe758961 100644 --- a/servers/slapd/bind.c +++ b/servers/slapd/bind.c @@ -1,4 +1,9 @@ /* bind.c - decode an ldap bind operation and pass it to a backend db */ +/* $OpenLDAP$ */ +/* + * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved. + * COPYING RESTRICTIONS APPLY, see COPYRIGHT file + */ /* * Copyright (c) 1995 Regents of the University of Michigan. @@ -19,23 +24,65 @@ #include #include +#include "ldap_pvt.h" #include "slap.h" -void +int do_bind( Connection *conn, Operation *op ) { BerElement *ber = op->o_ber; - int version, method, len; - char *cdn, *ndn; - unsigned long rc; + ber_int_t version; + ber_tag_t method; + char *mech; + char *dn; + char *ndn; + ber_tag_t tag; + int rc = LDAP_SUCCESS; + const char *text; struct berval cred; Backend *be; Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 ); + dn = NULL; + ndn = NULL; + mech = NULL; + cred.bv_val = NULL; + + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + + /* + * Force to connection to "anonymous" until bind succeeds. + */ + + if ( conn->c_cdn != NULL ) { + free( conn->c_cdn ); + conn->c_cdn = NULL; + } + + if ( conn->c_dn != NULL ) { + free( conn->c_dn ); + conn->c_dn = NULL; + } + + conn->c_authc_backend = NULL; + conn->c_authz_backend = NULL; + + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); + + if ( op->o_dn != NULL ) { + free( op->o_dn ); + op->o_dn = ch_strdup( "" ); + } + + if ( op->o_ndn != NULL ) { + free( op->o_ndn ); + op->o_ndn = ch_strdup( "" ); + } + /* * Parse the bind request. It looks like this: * @@ -45,98 +92,212 @@ do_bind( * authentication CHOICE { * simple [0] OCTET STRING -- passwd * krbv42ldap [1] OCTET STRING - * krbv42dsa [1] OCTET STRING + * krbv42dsa [2] OCTET STRING + * SASL [3] SaslCredentials * } + * } + * + * SaslCredentials ::= SEQUENCE { + * mechanism LDAPString, + * credentials OCTET STRING OPTIONAL * } */ -#ifdef LDAP_COMPAT30 - /* - * in version 3.0 there is an extra SEQUENCE tag after the - * BindRequest SEQUENCE tag. - */ + tag = ber_scanf( ber, "{iat" /*}*/, &version, &dn, &method ); + + if ( tag == LBER_ERROR ) { + Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 ); + send_ldap_disconnect( conn, op, + LDAP_PROTOCOL_ERROR, "decoding error" ); + rc = -1; + goto cleanup; + } + + op->o_protocol = version; - { - BerElement tber; - unsigned long tlen, ttag; + if( method != LDAP_AUTH_SASL ) { + tag = ber_scanf( ber, /*{*/ "o}", &cred ); - tber = *op->o_ber; - ttag = ber_skip_tag( &tber, &tlen ); - if ( ber_peek_tag( &tber, &tlen ) == LBER_SEQUENCE ) { - Debug( LDAP_DEBUG_ANY, "version 3.0 detected\n", 0, 0, 0 ); - conn->c_version = 30; - rc = ber_scanf(ber, "{{iato}}", &version, &cdn, &method, &cred); } else { - rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred ); + tag = ber_scanf( ber, "{a" /*}*/, &mech ); + + if ( tag != LBER_ERROR ) { + ber_len_t len; + tag = ber_peek_tag( ber, &len ); + + if ( tag == LDAP_TAG_LDAPCRED ) { + tag = ber_scanf( ber, "o", &cred ); + } + + if ( tag != LBER_ERROR ) { + tag = ber_scanf( ber, /*{{*/ "}}" ); + } + } } + + if ( tag == LBER_ERROR ) { + send_ldap_disconnect( conn, op, + LDAP_PROTOCOL_ERROR, + "decoding error" ); + rc = SLAPD_DISCONNECT; + goto cleanup; } -#else - rc = ber_scanf( ber, "{iato}", &version, &cdn, &method, &cred ); -#endif - if ( rc == LBER_ERROR ) { - Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 ); - send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL, - "decoding error" ); - return; - } -#ifdef LDAP_COMPAT30 - if ( conn->c_version == 30 ) { - switch ( method ) { - case LDAP_AUTH_SIMPLE_30: - method = LDAP_AUTH_SIMPLE; - break; -#ifdef HAVE_KERBEROS - case LDAP_AUTH_KRBV41_30: - method = LDAP_AUTH_KRBV41; - break; - case LDAP_AUTH_KRBV42_30: - method = LDAP_AUTH_KRBV42; - break; -#endif - } + if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 ); + goto cleanup; + } + + ndn = ch_strdup( dn ); + + if ( dn_normalize( ndn ) == NULL ) { + Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 ); + send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL, + "invalid DN", NULL, NULL ); + goto cleanup; } -#endif /* compat30 */ - Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n", - version, cdn, method ); + if( method == LDAP_AUTH_SASL ) { + Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n", + dn, mech, NULL ); + } else { + Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n", + (unsigned long) version, dn, (unsigned long) method ); + } - ndn = dn_normalize_case( ch_strdup( cdn ) ); + Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n", + op->o_connid, op->o_opid, ndn, (unsigned long) method, 0 ); - Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n", - conn->c_connid, op->o_opid, ndn, method, 0 ); + if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) { + Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n", + (unsigned long) version, 0, 0 ); + send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, + NULL, "requested protocol version not supported", NULL, NULL ); + goto cleanup; + } - if ( version != LDAP_VERSION2 ) { - if ( cdn != NULL ) { - free( cdn ); + /* we set connection version regardless of whether bind succeeds + * or not. + */ + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + conn->c_protocol = version; + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); + + if ( method == LDAP_AUTH_SASL ) { + char *edn; + + if ( version < LDAP_VERSION3 ) { + Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n", + (unsigned long) version, 0, 0 ); + send_ldap_disconnect( conn, op, + LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" ); + rc = SLAPD_DISCONNECT; + goto cleanup; } - if ( ndn != NULL ) { - free( ndn ); + + if( mech == NULL || *mech == '\0' ) { + Debug( LDAP_DEBUG_ANY, + "do_bind: no sasl mechanism provided\n", + 0, 0, 0 ); + send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED, + NULL, "no SASL mechanism provided", NULL, NULL ); + goto cleanup; } - if ( cred.bv_val != NULL ) { - free( cred.bv_val ); + + if( !charray_inlist( supportedSASLMechanisms, mech ) ) { + Debug( LDAP_DEBUG_ANY, + "do_bind: sasl mechanism=\"%s\" not supported.\n", + mech, 0, 0 ); + send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED, + NULL, "SASL mechanism not supported", NULL, NULL ); + goto cleanup; } - Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 ); - send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL, - "version not supported" ); - return; - } + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + + if ( conn->c_sasl_bind_mech != NULL ) { + if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) { + /* mechanism changed, cancel in progress bind */ +#ifdef HAVE_CYRUS_SASL + sasl_dispose(&conn->c_sasl_bind_context); + conn->c_sasl_bind_context = NULL; +#endif + } + free( conn->c_sasl_bind_mech ); + conn->c_sasl_bind_mech = NULL; - /* accept null binds */ - if ( ndn == NULL || *ndn == '\0' ) { - if ( cdn != NULL ) { - free( cdn ); +#ifdef LDAP_DEBUG +#ifdef HAVE_CYRUS_SASL + } else { + assert( conn->c_sasl_bind_context == NULL ); +#endif +#endif } - if ( ndn != NULL ) { - free( ndn ); + + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); + + edn = NULL; + rc = sasl_bind( conn, op, dn, ndn, mech, &cred, &edn ); + + if( rc == LDAP_SUCCESS ) { + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); +#ifdef HAVE_CYRUS_SASL + assert( conn->c_sasl_bind_context == NULL ); +#endif + conn->c_dn = edn; + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); + + } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) { +#ifdef HAVE_CYRUS_SASL + assert( conn->c_sasl_bind_context != NULL ); +#endif + conn->c_sasl_bind_mech = mech; + mech = NULL; + +#ifdef HAVE_CYRUS_SASL + } else { + assert( conn->c_sasl_bind_context != NULL ); +#endif } - if ( cred.bv_val != NULL ) { - free( cred.bv_val ); + + goto cleanup; + + } else { + /* Not SASL, cancel any in-progress bind */ + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + + if ( conn->c_sasl_bind_mech != NULL ) { + assert( conn->c_sasl_bind_in_progress ); + + free(conn->c_sasl_bind_mech); + conn->c_sasl_bind_mech = NULL; + +#ifdef HAVE_CYRUS_SASL + assert( conn->c_sasl_bind_context != NULL ); + sasl_dispose(&conn->c_sasl_bind_context); + conn->c_sasl_bind_context = NULL; +#endif + } else { + assert( !conn->c_sasl_bind_in_progress ); +#ifdef HAVE_CYRUS_SASL + assert( conn->c_sasl_bind_context == NULL ); +#endif } - send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL ); - return; + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); + } + + /* accept "anonymous" binds */ + if ( cred.bv_len == 0 || ndn == NULL || *ndn == '\0' ) { + /* + * we already forced connection to "anonymous", + * just need to send success + */ + send_ldap_result( conn, op, LDAP_SUCCESS, + NULL, NULL, NULL, NULL ); + Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n", + version, 0, 0 ); + goto cleanup; } /* @@ -146,44 +307,46 @@ do_bind( */ if ( (be = select_backend( ndn )) == NULL ) { - free( cdn ); - free( ndn ); - if ( cred.bv_val != NULL ) { - free( cred.bv_val ); - } - if ( cred.bv_len == 0 ) { - send_ldap_result( conn, op, LDAP_SUCCESS, - NULL, NULL ); - } else if ( default_referral && *default_referral ) { - send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS, - NULL, default_referral ); + if ( default_referral ) { + send_ldap_result( conn, op, rc = LDAP_REFERRAL, + NULL, NULL, default_referral, NULL ); + } else { - send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS, - NULL, default_referral ); + /* noSuchObject is not allowed to be returned by bind */ + send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS, + NULL, NULL, NULL, NULL ); } - return; + + goto cleanup; } - if ( be->be_bind != NULL ) { - /* alias suffix */ - char *edn; + conn->c_authz_backend = be; - ndn = suffixAlias( ndn, op, be ); - dn_normalize_case( ndn ); + /* make sure this backend recongizes critical controls */ + rc = backend_check_controls( be, conn, op, &text ) ; - if ( (*be->be_bind)( be, conn, op, ndn, method, &cred, &edn ) == 0 ) { - pthread_mutex_lock( &conn->c_dnmutex ); + if( rc != LDAP_SUCCESS ) { + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); + goto cleanup; + } - if ( conn->c_cdn != NULL ) { - free( conn->c_cdn ); - } + if ( be->be_bind ) { + int ret; + /* alias suffix */ + char *edn = NULL; - conn->c_cdn = cdn; - cdn = NULL; + /* deref suffix alias if appropriate */ + ndn = suffix_alias( be, ndn ); - if ( conn->c_cdn != NULL ) { - free( conn->c_dn ); - } + ret = (*be->be_bind)( be, conn, op, dn, ndn, + method, &cred, &edn ); + + if ( ret == 0 ) { + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + + conn->c_cdn = dn; + dn = NULL; if(edn != NULL) { conn->c_dn = edn; @@ -192,30 +355,37 @@ do_bind( ndn = NULL; } - Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n", - conn->c_cdn, conn->c_dn, method ); + Debug( LDAP_DEBUG_TRACE, "do_bind: v%d bind: \"%s\" to \"%s\"\n", + version, conn->c_cdn, conn->c_dn ); - pthread_mutex_unlock( &conn->c_dnmutex ); + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); /* send this here to avoid a race condition */ - send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL ); + send_ldap_result( conn, op, LDAP_SUCCESS, + NULL, NULL, NULL, NULL ); } else if (edn != NULL) { free( edn ); } } else { - send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL, - "Function not implemented" ); + send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM, + NULL, "operation not supported within namingContext", NULL, NULL ); } - if( cdn != NULL ) { - free( cdn ); +cleanup: + if( dn != NULL ) { + free( dn ); } if( ndn != NULL ) { free( ndn ); } + if ( mech != NULL ) { + free( mech ); + } if ( cred.bv_val != NULL ) { free( cred.bv_val ); } + + return rc; }