--- libraries/libldap/sasl.c 1999/12/12 02:16:46 1.3 +++ libraries/libldap/sasl.c 2006/01/03 22:12:09 1.63 @@ -1,7 +1,19 @@ -/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.2 1999/09/08 17:06:29 kdz Exp $ */ -/* - * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved. - * COPYING RESTRICTIONS APPLY, see COPYRIGHT file +/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.62 2005/12/13 19:11:26 ando Exp $ */ +/* This work is part of OpenLDAP Software . + * + * Copyright 1998-2006 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 + * . + */ +/* Portions Copyright (C) The Internet Society (1997) + * ASN.1 fragments are from RFC 2251; see RFC for full legal notices. */ /* @@ -10,7 +22,7 @@ * name DistinguishedName, -- who * authentication CHOICE { * simple [0] OCTET STRING -- passwd -#ifdef HAVE_KERBEROS +#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND * krbv42ldap [1] OCTET STRING * krbv42dsa [2] OCTET STRING #endif @@ -30,20 +42,22 @@ #include #include +#include #include #include +#include #include "ldap-int.h" - /* - * ldap_sasl_bind - bind to the ldap server (and X.500). The dn, mechanism, and - * credentials of the entry to which to bind are supplied. The message id - * of the request initiated is provided upon successful (LDAP_SUCCESS) return. + * ldap_sasl_bind - bind to the ldap server (and X.500). + * The dn (usually NULL), mechanism, and credentials are provided. + * The message id of the request initiated is provided upon successful + * (LDAP_SUCCESS) return. * * Example: - * ldap_sasl_bind( ld, "cn=manager, o=university of michigan, c=us", - * "mechanism", "secret", NULL, NULL, &msgid ) + * ldap_sasl_bind( ld, NULL, "mechanism", + * cred, NULL, NULL, &msgid ) */ int @@ -58,6 +72,7 @@ ldap_sasl_bind( { BerElement *ber; int rc; + ber_int_t id; Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 ); @@ -65,20 +80,24 @@ ldap_sasl_bind( assert( LDAP_VALID( ld ) ); assert( msgidp != NULL ); - if( msgidp == NULL ) { - ld->ld_errno = LDAP_PARAM_ERROR; - return ld->ld_errno; - } + /* check client controls */ + rc = ldap_int_client_controls( ld, cctrls ); + if( rc != LDAP_SUCCESS ) return rc; + + if( mechanism == LDAP_SASL_SIMPLE ) { + if( dn == NULL && cred != NULL && cred->bv_len ) { + /* use default binddn */ + dn = ld->ld_defbinddn; + } - if( mechanism != LDAP_SASL_SIMPLE - && ld->ld_version < LDAP_VERSION3) - { + } else if( ld->ld_version < LDAP_VERSION3 ) { ld->ld_errno = LDAP_NOT_SUPPORTED; return ld->ld_errno; } - if ( dn == NULL ) + if ( dn == NULL ) { dn = ""; + } /* create a message to send */ if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) { @@ -86,26 +105,27 @@ ldap_sasl_bind( return ld->ld_errno; } - assert( BER_VALID( ber ) ); + assert( LBER_VALID( ber ) ); + LDAP_NEXT_MSGID( ld, id ); if( mechanism == LDAP_SASL_SIMPLE ) { /* simple bind */ - rc = ber_printf( ber, "{it{istO}" /*}*/, - ++ld->ld_msgid, LDAP_REQ_BIND, + rc = ber_printf( ber, "{it{istON}" /*}*/, + id, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SIMPLE, cred ); - } else if ( cred == NULL ) { - /* SASL bind w/o creditials */ - rc = ber_printf( ber, "{it{ist{s}}" /*}*/, - ++ld->ld_msgid, LDAP_REQ_BIND, + } else if ( cred == NULL || cred->bv_val == NULL ) { + /* SASL bind w/o credentials */ + rc = ber_printf( ber, "{it{ist{sN}N}" /*}*/, + id, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SASL, mechanism ); } else { - /* SASL bind w/ creditials */ - rc = ber_printf( ber, "{it{ist{sO}}" /*}*/, - ++ld->ld_msgid, LDAP_REQ_BIND, + /* SASL bind w/ credentials */ + rc = ber_printf( ber, "{it{ist{sON}N}" /*}*/, + id, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SASL, mechanism, cred ); } @@ -122,20 +142,15 @@ ldap_sasl_bind( return ld->ld_errno; } - if ( ber_printf( ber, /*{*/ "}" ) == -1 ) { + if ( ber_printf( ber, /*{*/ "N}" ) == -1 ) { ld->ld_errno = LDAP_ENCODING_ERROR; ber_free( ber, 1 ); return ld->ld_errno; } -#ifndef LDAP_NOCACHE - if ( ld->ld_cache != NULL ) { - ldap_flush_cache( ld ); - } -#endif /* !LDAP_NOCACHE */ /* send the message */ - *msgidp = ldap_send_initial_request( ld, LDAP_REQ_BIND, dn, ber ); + *msgidp = ldap_send_initial_request( ld, LDAP_REQ_BIND, dn, ber, id ); if(*msgidp < 0) return ld->ld_errno; @@ -143,16 +158,6 @@ ldap_sasl_bind( return LDAP_SUCCESS; } -/* - * ldap_sasl_bind_s - bind to the ldap server (and X.500) using simple - * authentication. The dn and password of the entry to which to bind are - * supplied. LDAP_SUCCESS is returned upon success, the ldap error code - * otherwise. - * - * Example: - * ldap_sasl_bind_s( ld, "cn=manager, o=university of michigan, c=us", - * "mechanism", "secret", NULL, NULL, &servercred ) - */ int ldap_sasl_bind_s( @@ -185,7 +190,13 @@ ldap_sasl_bind_s( return( rc ); } - if ( ldap_result( ld, msgid, 1, NULL, &result ) == -1 ) { +#ifdef LDAP_CONNECTIONLESS + if (LDAP_IS_UDP(ld)) { + return( rc ); + } +#endif + + if ( ldap_result( ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 ) { return( ld->ld_errno ); /* ldap_result sets ld_errno */ } @@ -195,19 +206,21 @@ ldap_sasl_bind_s( rc = ldap_parse_sasl_bind_result( ld, result, &scredp, 0 ); } - if( rc != LDAP_SUCCESS ) { + if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) { ldap_msgfree( result ); return( rc ); } rc = ldap_result2error( ld, result, 1 ); - if( rc == LDAP_SUCCESS ) { + if ( rc == LDAP_SUCCESS || rc == LDAP_SASL_BIND_IN_PROGRESS ) { if( servercredp != NULL ) { *servercredp = scredp; + scredp = NULL; } + } - } else if (scredp != NULL ) { + if ( scredp != NULL ) { ber_bvfree(scredp); } @@ -216,18 +229,18 @@ ldap_sasl_bind_s( /* - * Parse BindResponse: - * - * BindResponse ::= [APPLICATION 1] SEQUENCE { - * COMPONENTS OF LDAPResult, - * serverSaslCreds [7] OCTET STRING OPTIONAL } - * - * LDAPResult ::= SEQUENCE { - * resultCode ENUMERATED, - * matchedDN LDAPDN, - * errorMessage LDAPString, - * referral [3] Referral OPTIONAL } - */ +* Parse BindResponse: +* +* BindResponse ::= [APPLICATION 1] SEQUENCE { +* COMPONENTS OF LDAPResult, +* serverSaslCreds [7] OCTET STRING OPTIONAL } +* +* LDAPResult ::= SEQUENCE { +* resultCode ENUMERATED, +* matchedDN LDAPDN, +* errorMessage LDAPString, +* referral [3] Referral OPTIONAL } +*/ int ldap_parse_sasl_bind_result( @@ -248,18 +261,14 @@ ldap_parse_sasl_bind_result( assert( LDAP_VALID( ld ) ); assert( res != NULL ); - if ( ld == NULL || res == NULL ) { - return LDAP_PARAM_ERROR; - } - - if(servercredp != NULL) { + if( servercredp != NULL ) { if( ld->ld_version < LDAP_VERSION2 ) { return LDAP_NOT_SUPPORTED; } *servercredp = NULL; } - if( res->lm_msgtype == LDAP_RES_BIND ) { + if( res->lm_msgtype != LDAP_RES_BIND ) { ld->ld_errno = LDAP_PARAM_ERROR; return ld->ld_errno; } @@ -285,8 +294,13 @@ ldap_parse_sasl_bind_result( } if ( ld->ld_version < LDAP_VERSION2 ) { +#ifdef LDAP_NULL_IS_NULL + tag = ber_scanf( ber, "{iA}", + &errcode, &ld->ld_error ); +#else /* ! LDAP_NULL_IS_NULL */ tag = ber_scanf( ber, "{ia}", &errcode, &ld->ld_error ); +#endif /* ! LDAP_NULL_IS_NULL */ if( tag == LBER_ERROR ) { ber_free( ber, 0 ); @@ -297,8 +311,13 @@ ldap_parse_sasl_bind_result( } else { ber_len_t len; - tag = ber_scanf( ber, "{iaa" /*}*/, +#ifdef LDAP_NULL_IS_NULL + tag = ber_scanf( ber, "{eAA" /*}*/, &errcode, &ld->ld_matched, &ld->ld_error ); +#else /* ! LDAP_NULL_IS_NULL */ + tag = ber_scanf( ber, "{eaa" /*}*/, + &errcode, &ld->ld_matched, &ld->ld_error ); +#endif /* ! LDAP_NULL_IS_NULL */ if( tag == LBER_ERROR ) { ber_free( ber, 0 ); @@ -345,3 +364,127 @@ ldap_parse_sasl_bind_result( return( ld->ld_errno ); } + +int +ldap_pvt_sasl_getmechs ( LDAP *ld, char **pmechlist ) +{ + /* we need to query the server for supported mechs anyway */ + LDAPMessage *res, *e; + char *attrs[] = { "supportedSASLMechanisms", NULL }; + char **values, *mechlist; + int rc; + + Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_getmech\n", 0, 0, 0 ); + + rc = ldap_search_s( ld, "", LDAP_SCOPE_BASE, + NULL, attrs, 0, &res ); + + if ( rc != LDAP_SUCCESS ) { + return ld->ld_errno; + } + + e = ldap_first_entry( ld, res ); + if ( e == NULL ) { + ldap_msgfree( res ); + if ( ld->ld_errno == LDAP_SUCCESS ) { + ld->ld_errno = LDAP_NO_SUCH_OBJECT; + } + return ld->ld_errno; + } + + values = ldap_get_values( ld, e, "supportedSASLMechanisms" ); + if ( values == NULL ) { + ldap_msgfree( res ); + ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE; + return ld->ld_errno; + } + + mechlist = ldap_charray2str( values, " " ); + if ( mechlist == NULL ) { + LDAP_VFREE( values ); + ldap_msgfree( res ); + ld->ld_errno = LDAP_NO_MEMORY; + return ld->ld_errno; + } + + LDAP_VFREE( values ); + ldap_msgfree( res ); + + *pmechlist = mechlist; + + return LDAP_SUCCESS; +} + +/* + * ldap_sasl_interactive_bind_s - interactive SASL authentication + * + * This routine uses interactive callbacks. + * + * LDAP_SUCCESS is returned upon success, the ldap error code + * otherwise. + */ +int +ldap_sasl_interactive_bind_s( + LDAP *ld, + LDAP_CONST char *dn, /* usually NULL */ + LDAP_CONST char *mechs, + LDAPControl **serverControls, + LDAPControl **clientControls, + unsigned flags, + LDAP_SASL_INTERACT_PROC *interact, + void *defaults ) +{ + int rc; + char *smechs = NULL; + +#if defined( LDAP_R_COMPILE ) && defined( HAVE_CYRUS_SASL ) + ldap_pvt_thread_mutex_lock( &ldap_int_sasl_mutex ); +#endif +#ifdef LDAP_CONNECTIONLESS + if( LDAP_IS_UDP(ld) ) { + /* Just force it to simple bind, silly to make the user + * ask all the time. No, we don't ever actually bind, but I'll + * let the final bind handler take care of saving the cdn. + */ + rc = ldap_simple_bind( ld, dn, NULL ); + rc = rc < 0 ? rc : 0; + goto done; + } else +#endif + +#ifdef HAVE_CYRUS_SASL + if( mechs == NULL || *mechs == '\0' ) { + mechs = ld->ld_options.ldo_def_sasl_mech; + } +#endif + + if( mechs == NULL || *mechs == '\0' ) { + rc = ldap_pvt_sasl_getmechs( ld, &smechs ); + if( rc != LDAP_SUCCESS ) { + goto done; + } + + Debug( LDAP_DEBUG_TRACE, + "ldap_sasl_interactive_bind_s: server supports: %s\n", + smechs, 0, 0 ); + + mechs = smechs; + + } else { + Debug( LDAP_DEBUG_TRACE, + "ldap_sasl_interactive_bind_s: user selected: %s\n", + mechs, 0, 0 ); + } + + rc = ldap_int_sasl_bind( ld, dn, mechs, + serverControls, clientControls, + flags, interact, defaults ); + +done: +#if defined( LDAP_R_COMPILE ) && defined( HAVE_CYRUS_SASL ) + ldap_pvt_thread_mutex_unlock( &ldap_int_sasl_mutex ); +#endif + if ( smechs ) LDAP_FREE( smechs ); + + return rc; +}