X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fbind.c;h=6480cf7fb82b5fcaa375e44e08ab3e2a9737df07;hb=0f30fb0d8f0adbbb7b41fd455c57aa56d64c9853;hp=4fa847853540897df6232299bade1f27978846bf;hpb=b76c56ba3f45576b9c418ea9fe7f7b3440052904;p=openldap diff --git a/servers/slapd/bind.c b/servers/slapd/bind.c index 4fa8478535..6480cf7fb8 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. @@ -15,28 +20,58 @@ #include "portable.h" #include -#include -#include -#include -#include "slap.h" -extern Backend *select_backend(); +#include +#include -extern char *default_referral; +#include "ldap_pvt.h" +#include "slap.h" -void +int do_bind( Connection *conn, Operation *op ) { BerElement *ber = op->o_ber; - int version, method, len, 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; +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY, "do_bind: conn %d\n", conn->c_connid )); +#else Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 ); +#endif + + dn = NULL; + ndn = NULL; + mech = NULL; + cred.bv_val = NULL; + + /* + * Force to connection to "anonymous" until bind succeeds. + */ + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + connection2anonymous( conn ); + 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: @@ -47,90 +82,344 @@ 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 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 ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_ERR, + "do_bind: conn %d ber_scanf failed\n", conn->c_connid )); +#else + Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 ); +#endif + send_ldap_disconnect( conn, op, + LDAP_PROTOCOL_ERROR, "decoding error" ); + rc = -1; + goto cleanup; + } + + op->o_protocol = version; + + if( method != LDAP_AUTH_SASL ) { + tag = ber_scanf( ber, /*{*/ "o}", &cred ); - { - BerElement tber; - unsigned long tlen, ttag; - - 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, &dn, &method, &cred); } else { - rc = ber_scanf( ber, "{iato}", &version, &dn, &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 ); + } else { + tag = LDAP_TAG_LDAPCRED; + cred.bv_val = NULL; + cred.bv_len = 0; + } + + 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; } + + if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d get_ctrls failed\n", conn->c_connid )); +#else + Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 ); +#endif + goto cleanup; + } + + ndn = ch_strdup( dn ); + + if ( dn_normalize( ndn ) == NULL ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d invalid dn (%s)\n", conn->c_connid, dn )); +#else + Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 ); +#endif + send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL, + "invalid DN", NULL, NULL ); + goto cleanup; } + + if( method == LDAP_AUTH_SASL ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1, + "do_sasl_bind: conn %d dn (%s) mech %s\n", conn->c_connid, + dn, mech )); #else - rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred ); + Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n", + dn, mech, NULL ); #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 COMPAT30 - if ( conn->c_version == 30 ) { - switch ( method ) { - case LDAP_AUTH_SIMPLE_30: - method = LDAP_AUTH_SIMPLE; - break; -#ifdef KERBEROS - case LDAP_AUTH_KRBV41_30: - method = LDAP_AUTH_KRBV41; - break; - case LDAP_AUTH_KRBV42_30: - method = LDAP_AUTH_KRBV42; - break; + } else { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1, + "do_bind: conn %d version=%ld dn=\"%s\" method=%ld\n", + conn->c_connid, (unsigned long) version, dn, (unsigned long)method )); +#else + Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n", + (unsigned long) version, dn, (unsigned long) method ); #endif - } } -#endif /* compat30 */ - dn_normalize( dn ); - Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n", - conn->c_connid, op->o_opid, dn, method, 0 ); + 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 ); + + if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d unknown version = %ld\n", + conn->c_connid, (unsigned long)version )); +#else + Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n", + (unsigned long) version, 0, 0 ); +#endif + send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, + NULL, "requested protocol version not supported", NULL, NULL ); + goto cleanup; + + } else if (( global_disallows & SLAP_DISALLOW_BIND_V2 ) && + version < LDAP_VERSION3 ) + { + send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR, + NULL, "requested protocol version not allowed", NULL, NULL ); + goto cleanup; + } + + /* 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; + slap_ssf_t ssf = 0; + + if ( version < LDAP_VERSION3 ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d sasl with LDAPv%ld\n", + conn->c_connid, (unsigned long)version )); +#else + Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n", + (unsigned long) version, 0, 0 ); +#endif + send_ldap_disconnect( conn, op, + LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" ); + rc = SLAPD_DISCONNECT; + goto cleanup; + } + + if( mech == NULL || *mech == '\0' ) { +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d no SASL mechanism provided\n", + conn->c_connid )); +#else + Debug( LDAP_DEBUG_ANY, + "do_bind: no sasl mechanism provided\n", + 0, 0, 0 ); +#endif + send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED, + NULL, "no SASL mechanism provided", NULL, NULL ); + goto cleanup; + } - if ( version != LDAP_VERSION2 ) { - if ( dn != NULL ) { - free( dn ); + /* check restrictions */ + rc = backend_check_restrictions( NULL, conn, op, mech, &text ); + if( rc != LDAP_SUCCESS ) { + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); + goto cleanup; } - if ( cred.bv_val != NULL ) { - free( cred.bv_val ); + + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + if ( conn->c_sasl_bind_in_progress ) { + if((strcmp(conn->c_sasl_bind_mech, mech) != 0)) { + /* mechanism changed between bind steps */ + slap_sasl_reset(conn); + } + } else { + conn->c_sasl_bind_mech = mech; + mech = NULL; } + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); - Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 ); - send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL, - "version not supported" ); - return; + edn = NULL; + rc = slap_sasl_bind( conn, op, dn, ndn, &cred, &edn, &ssf ); + + ldap_pvt_thread_mutex_lock( &conn->c_mutex ); + if( rc == LDAP_SUCCESS ) { + conn->c_dn = edn; + conn->c_authmech = conn->c_sasl_bind_mech; + conn->c_sasl_bind_mech = NULL; + conn->c_sasl_bind_in_progress = 0; + + conn->c_sasl_ssf = ssf; + if( ssf > conn->c_ssf ) { + conn->c_ssf = ssf; + } + + if( conn->c_dn != NULL ) { + ber_len_t max = sockbuf_max_incoming; + ber_sockbuf_ctrl( conn->c_sb, + LBER_SB_OPT_SET_MAX_INCOMING, &max ); + } + + } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) { + conn->c_sasl_bind_in_progress = 1; + + } else { + if ( conn->c_sasl_bind_mech ) { + free( conn->c_sasl_bind_mech ); + conn->c_sasl_bind_mech = NULL; + } + conn->c_sasl_bind_in_progress = 0; + } + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); + + 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 ) { + free(conn->c_sasl_bind_mech); + conn->c_sasl_bind_mech = NULL; + } + conn->c_sasl_bind_in_progress = 0; + + slap_sasl_reset( conn ); + ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); } - Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n", - version, dn, method ); + if ( method == LDAP_AUTH_SIMPLE ) { + /* accept "anonymous" binds */ + if ( cred.bv_len == 0 || ndn == NULL || *ndn == '\0' ) { + rc = LDAP_SUCCESS; + text = NULL; - /* accept null binds */ - if ( dn == NULL || *dn == '\0' ) { - if ( dn != NULL ) { - free( dn ); + if( cred.bv_len && + ( global_disallows & SLAP_DISALLOW_BIND_ANON_CRED )) + { + /* cred is not empty, disallow */ + rc = LDAP_INVALID_CREDENTIALS; + + } else if ( ndn != NULL && *ndn != '\0' && + ( global_disallows & SLAP_DISALLOW_BIND_ANON_DN )) + { + /* DN is not empty, disallow */ + rc = LDAP_UNWILLING_TO_PERFORM; + text = "unwilling to allow anonymous bind with non-empty DN"; + + } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) { + /* disallow */ + rc = LDAP_INAPPROPRIATE_AUTH; + text = "anonymous bind disallowed"; + + } else { + rc = backend_check_restrictions( NULL, conn, op, mech, &text ); + } + + /* + * we already forced connection to "anonymous", + * just need to send success + */ + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1, + "do_bind: conn %d v%d anonymous bind\n", + conn->c_connid, version )); +#else + Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n", + version, 0, 0 ); +#endif + goto cleanup; + + } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) { + /* disallow simple authentication */ + rc = LDAP_UNWILLING_TO_PERFORM; + text = "unwilling to perform simple authentication"; + + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d v%d simple bind(%s) disallowed\n", + conn->c_connid, version, ndn )); +#else + Debug( LDAP_DEBUG_TRACE, + "do_bind: v%d simple bind(%s) disallowed\n", + version, ndn, 0 ); +#endif + goto cleanup; } - if ( cred.bv_val != NULL ) { - free( cred.bv_val ); + +#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND + } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) { + if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) { + /* disallow simple authentication */ + rc = LDAP_UNWILLING_TO_PERFORM; + text = "unwilling to perform Kerberos V4 bind"; + + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1, + "do_bind: conn %d v%d Kerberos V4 bind\n", + conn->c_connid, version )); +#else + Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n", + version, 0, 0 ); +#endif + goto cleanup; } +#endif - send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL ); - return; + } else { + rc = LDAP_AUTH_METHOD_NOT_SUPPORTED; + text = "unknown authentication method"; + + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_INFO, + "do_bind: conn %d v%d unknown authentication method (%d)\n", + conn->c_connid, version, method )); +#else + Debug( LDAP_DEBUG_TRACE, + "do_bind: v%d unknown authentication method (%d)\n", + version, method, 0 ); +#endif + goto cleanup; } /* @@ -139,39 +428,102 @@ do_bind( * if we don't hold it. */ - if ( (be = select_backend( dn )) == NULL ) { - free( dn ); - if ( cred.bv_val != NULL ) { - free( cred.bv_val ); - } - if ( cred.bv_len == 0 ) { - send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL ); + if ( (be = select_backend( ndn, 0 )) == NULL ) { + if ( default_referral ) { + struct berval **ref = referral_rewrite( default_referral, + NULL, dn, LDAP_SCOPE_DEFAULT ); + + send_ldap_result( conn, op, rc = LDAP_REFERRAL, + NULL, NULL, ref ? ref : default_referral, NULL ); + + ber_bvecfree( ref ); + } else { - send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS, 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; + } + + /* check restrictions */ + rc = backend_check_restrictions( be, conn, op, NULL, &text ); + if( rc != LDAP_SUCCESS ) { + send_ldap_result( conn, op, rc, + NULL, text, NULL, NULL ); + goto cleanup; } - if ( be->be_bind != NULL ) { - if ( (*be->be_bind)( be, conn, op, dn, method, &cred ) == 0 ) { - pthread_mutex_lock( &conn->c_dnmutex ); - if ( conn->c_dn != NULL ) { - free( conn->c_dn ); + conn->c_authz_backend = be; + + if ( be->be_bind ) { + int ret; + /* alias suffix */ + char *edn = NULL; + + /* deref suffix alias if appropriate */ + ndn = suffix_alias( be, ndn ); + + 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; + } else { + conn->c_dn = ndn; + ndn = NULL; + } + + if( conn->c_dn != NULL ) { + ber_len_t max = sockbuf_max_incoming; + ber_sockbuf_ctrl( conn->c_sb, + LBER_SB_OPT_SET_MAX_INCOMING, &max ); } - conn->c_dn = strdup( dn ); - pthread_mutex_unlock( &conn->c_dnmutex ); + +#ifdef NEW_LOGGING + LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1, + "do_bind: conn %d v%d bind: \"%s\" to \"%s\" \n", + conn->c_connid, version, conn->c_cdn, conn->c_dn )); +#else + Debug( LDAP_DEBUG_TRACE, "do_bind: v%d bind: \"%s\" to \"%s\"\n", + version, conn->c_cdn, conn->c_dn ); +#endif + + 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 ); } - free( dn ); +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; }