--- libraries/libldap/sasl.c 2000/07/04 17:58:52 1.1.4.3 +++ libraries/libldap/sasl.c 2009/10/31 00:11:22 1.64.2.7 @@ -1,7 +1,16 @@ -/* $OpenLDAP: pkg/ldap/libraries/libldap/sasl.c,v 1.1.4.2 2000/06/13 17:57:20 kurt Exp $ */ -/* - * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved. - * COPYING RESTRICTIONS APPLY, see COPYRIGHT file +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software . + * + * Copyright 1998-2009 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 + * . */ /* @@ -10,10 +19,8 @@ * name DistinguishedName, -- who * authentication CHOICE { * simple [0] OCTET STRING -- passwd -#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND - * krbv42ldap [1] OCTET STRING - * krbv42dsa [2] OCTET STRING -#endif + * krbv42ldap [1] OCTET STRING -- OBSOLETE + * krbv42dsa [2] OCTET STRING -- OBSOLETE * sasl [3] SaslCredentials -- LDAPv3 * } * } @@ -30,13 +37,13 @@ #include #include +#include #include #include #include #include "ldap-int.h" - /* * ldap_sasl_bind - bind to the ldap server (and X.500). * The dn (usually NULL), mechanism, and credentials are provided. @@ -60,6 +67,7 @@ ldap_sasl_bind( { BerElement *ber; int rc; + ber_int_t id; Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 ); @@ -67,13 +75,12 @@ 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 ) { + if( dn == NULL && cred != NULL && cred->bv_len ) { /* use default binddn */ dn = ld->ld_defbinddn; } @@ -93,26 +100,27 @@ 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{istON}" /*}*/, - ++ld->ld_msgid, LDAP_REQ_BIND, + id, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SIMPLE, cred ); - } else if ( cred == NULL ) { - /* SASL bind w/o creditials */ + } else if ( cred == NULL || cred->bv_val == NULL ) { + /* SASL bind w/o credentials */ rc = ber_printf( ber, "{it{ist{sN}N}" /*}*/, - ++ld->ld_msgid, LDAP_REQ_BIND, + id, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SASL, mechanism ); } else { - /* SASL bind w/ creditials */ + /* SASL bind w/ credentials */ rc = ber_printf( ber, "{it{ist{sON}N}" /*}*/, - ++ld->ld_msgid, LDAP_REQ_BIND, + id, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SASL, mechanism, cred ); } @@ -135,14 +143,9 @@ ldap_sasl_bind( 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; @@ -182,7 +185,13 @@ 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 || !result ) { return( ld->ld_errno ); /* ldap_result sets ld_errno */ } @@ -192,7 +201,7 @@ ldap_sasl_bind_s( rc = ldap_parse_sasl_bind_result( ld, result, &scredp, 0 ); } - if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) { + if ( rc != LDAP_SUCCESS ) { ldap_msgfree( result ); return( rc ); } @@ -247,10 +256,6 @@ 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( ld->ld_version < LDAP_VERSION2 ) { return LDAP_NOT_SUPPORTED; @@ -284,7 +289,7 @@ ldap_parse_sasl_bind_result( } if ( ld->ld_version < LDAP_VERSION2 ) { - tag = ber_scanf( ber, "{ia}", + tag = ber_scanf( ber, "{iA}", &errcode, &ld->ld_error ); if( tag == LBER_ERROR ) { @@ -296,7 +301,7 @@ ldap_parse_sasl_bind_result( } else { ber_len_t len; - tag = ber_scanf( ber, "{iaa" /*}*/, + tag = ber_scanf( ber, "{eAA" /*}*/, &errcode, &ld->ld_matched, &ld->ld_error ); if( tag == LBER_ERROR ) { @@ -342,118 +347,191 @@ ldap_parse_sasl_bind_result( ldap_msgfree( res ); } - return( ld->ld_errno ); + return( LDAP_SUCCESS ); } -#ifdef HAVE_CYRUS_SASL -/* -* Various Cyrus SASL related stuff. -*/ +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; -#define MAX_BUFF_SIZE 65536 -#define MIN_BUFF_SIZE 4096 + Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_getmech\n", 0, 0, 0 ); -static char * -array2str( char **a ) -{ - char *s, **v, *p; - int len = 0; + rc = ldap_search_s( ld, "", LDAP_SCOPE_BASE, + NULL, attrs, 0, &res ); - for ( v = a; *v != NULL; v++ ) { - len += strlen( *v ) + 1; /* for a space */ + if ( rc != LDAP_SUCCESS ) { + return ld->ld_errno; } - - if ( len == 0 ) { - return NULL; + + 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; } - s = LDAP_MALLOC ( len ); /* last space holds \0 */ - - if ( s == NULL ) { - return NULL; + values = ldap_get_values( ld, e, "supportedSASLMechanisms" ); + if ( values == NULL ) { + ldap_msgfree( res ); + ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE; + return ld->ld_errno; } - p = s; - for ( v = a; *v != NULL; v++ ) { - int len; + mechlist = ldap_charray2str( values, " " ); + if ( mechlist == NULL ) { + LDAP_VFREE( values ); + ldap_msgfree( res ); + ld->ld_errno = LDAP_NO_MEMORY; + return ld->ld_errno; + } - if ( v != a ) { - strncpy( p, " ", 1 ); - ++p; - } - len = strlen( *v ); - strncpy( p, *v, len ); - p += len; - } + LDAP_VFREE( values ); + ldap_msgfree( res ); - *p = '\0'; + *pmechlist = mechlist; - return s; + return LDAP_SUCCESS; } -int ldap_pvt_sasl_init( void ) +/* + * 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 ) { - /* XXX not threadsafe */ - static int sasl_initialized = 0; + int rc; + char *smechs = NULL; - if ( sasl_initialized ) { - return 0; +#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; } -#ifndef CSRIMALLOC - sasl_set_alloc( ber_memalloc, ber_memcalloc, ber_memrealloc, ber_memfree ); -#endif /* CSRIMALLOC */ +#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 ); - if ( sasl_client_init( NULL ) == SASL_OK ) { - sasl_initialized = 1; - return 0; + mechs = smechs; + + } else { + Debug( LDAP_DEBUG_TRACE, + "ldap_sasl_interactive_bind_s: user selected: %s\n", + mechs, 0, 0 ); } - return -1; + 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; } -/* - * SASL encryption support for LBER Sockbufs - */ +#ifdef HAVE_CYRUS_SASL -struct sb_sasl_data { - sasl_conn_t *sasl_context; - Sockbuf_Buf sec_buf_in; - Sockbuf_Buf buf_in; - Sockbuf_Buf buf_out; -}; +#ifdef HAVE_SASL_SASL_H +#include +#else +#include +#endif + +#endif /* HAVE_CYRUS_SASL */ static int -sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg ) +sb_sasl_generic_remove( Sockbuf_IO_Desc *sbiod ); + +static int +sb_sasl_generic_setup( Sockbuf_IO_Desc *sbiod, void *arg ) { - struct sb_sasl_data *p; + struct sb_sasl_generic_data *p; + struct sb_sasl_generic_install *i; assert( sbiod != NULL ); + i = (struct sb_sasl_generic_install *)arg; + p = LBER_MALLOC( sizeof( *p ) ); if ( p == NULL ) return -1; - p->sasl_context = (sasl_conn_t *)arg; + p->ops = i->ops; + p->ops_private = i->ops_private; + p->sbiod = sbiod; + p->flags = 0; ber_pvt_sb_buf_init( &p->sec_buf_in ); ber_pvt_sb_buf_init( &p->buf_in ); ber_pvt_sb_buf_init( &p->buf_out ); - if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, MIN_BUFF_SIZE ) < 0 ) { - errno = ENOMEM; - return -1; - } sbiod->sbiod_pvt = p; + p->ops->init( p, &p->min_send, &p->max_send, &p->max_recv ); + + if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, p->min_send ) < 0 ) { + sb_sasl_generic_remove( sbiod ); + sock_errset(ENOMEM); + return -1; + } + return 0; } static int -sb_sasl_remove( Sockbuf_IO_Desc *sbiod ) +sb_sasl_generic_remove( Sockbuf_IO_Desc *sbiod ) { - struct sb_sasl_data *p; + struct sb_sasl_generic_data *p; assert( sbiod != NULL ); - - p = (struct sb_sasl_data *)sbiod->sbiod_pvt; + + p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; + + p->ops->fini(p); + ber_pvt_sb_buf_destroy( &p->sec_buf_in ); ber_pvt_sb_buf_destroy( &p->buf_in ); ber_pvt_sb_buf_destroy( &p->buf_out ); @@ -463,58 +541,65 @@ sb_sasl_remove( Sockbuf_IO_Desc *sbiod ) } static ber_len_t -sb_sasl_pkt_length( const char *buf, int debuglevel ) +sb_sasl_generic_pkt_length( + struct sb_sasl_generic_data *p, + const unsigned char *buf, + int debuglevel ) { ber_len_t size; - long tmp; assert( buf != NULL ); - tmp = *((long *)buf); - size = ntohl( tmp ); - - if ( size > MAX_BUFF_SIZE ) { + size = buf[0] << 24 + | buf[1] << 16 + | buf[2] << 8 + | buf[3]; + + if ( size > p->max_recv ) { /* somebody is trying to mess me up. */ ber_log_printf( LDAP_DEBUG_ANY, debuglevel, - "sb_sasl_pkt_length: received illegal packet length " - "of %lu bytes\n", (unsigned long)size ); + "sb_sasl_generic_pkt_length: " + "received illegal packet length of %lu bytes\n", + (unsigned long)size ); size = 16; /* this should lead to an error. */ -} + } return size + 4; /* include the size !!! */ } /* Drop a processed packet from the input buffer */ static void -sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel ) +sb_sasl_generic_drop_packet ( + struct sb_sasl_generic_data *p, + int debuglevel ) { ber_slen_t len; - len = sec_buf_in->buf_ptr - sec_buf_in->buf_end; + len = p->sec_buf_in.buf_ptr - p->sec_buf_in.buf_end; if ( len > 0 ) - memmove( sec_buf_in->buf_base, sec_buf_in->buf_base + - sec_buf_in->buf_end, len ); - + AC_MEMCPY( p->sec_buf_in.buf_base, p->sec_buf_in.buf_base + + p->sec_buf_in.buf_end, len ); + if ( len >= 4 ) { - sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base, - debuglevel); + p->sec_buf_in.buf_end = sb_sasl_generic_pkt_length(p, + (unsigned char *) p->sec_buf_in.buf_base, debuglevel); } else { - sec_buf_in->buf_end = 0; + p->sec_buf_in.buf_end = 0; } - sec_buf_in->buf_ptr = len; + p->sec_buf_in.buf_ptr = len; } static ber_slen_t -sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) +sb_sasl_generic_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) { - struct sb_sasl_data *p; - ber_slen_t ret, bufptr; - + struct sb_sasl_generic_data *p; + ber_slen_t ret, bufptr; + assert( sbiod != NULL ); assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); - p = (struct sb_sasl_data *)sbiod->sbiod_pvt; + p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; /* Are there anything left in the buffer? */ ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len ); @@ -524,30 +609,32 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, vo if ( len == 0 ) return bufptr; - ber_pvt_sb_buf_destroy( &p->buf_in ); + p->ops->reset_buf( p, &p->buf_in ); /* Read the length of the packet */ while ( p->sec_buf_in.buf_ptr < 4 ) { - ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base, + ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base + + p->sec_buf_in.buf_ptr, 4 - p->sec_buf_in.buf_ptr ); #ifdef EINTR if ( ( ret < 0 ) && ( errno == EINTR ) ) continue; #endif if ( ret <= 0 ) - return ret; + return bufptr ? bufptr : ret; p->sec_buf_in.buf_ptr += ret; } /* The new packet always starts at p->sec_buf_in.buf_base */ - ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base, + ret = sb_sasl_generic_pkt_length(p, (unsigned char *) p->sec_buf_in.buf_base, sbiod->sbiod_sb->sb_debug ); /* Grow the packet buffer if neccessary */ - if ( ( p->sec_buf_in.buf_size < ret ) && - ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) { - errno = ENOMEM; + if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) && + ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) + { + sock_errset(ENOMEM); return -1; } p->sec_buf_in.buf_end = ret; @@ -564,29 +651,23 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, vo continue; #endif if ( ret <= 0 ) - return ret; + return bufptr ? bufptr : ret; p->sec_buf_in.buf_ptr += ret; } /* Decode the packet */ - ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base, - p->sec_buf_in.buf_end, &p->buf_in.buf_base, - (unsigned *)&p->buf_in.buf_end ); - if ( ret != SASL_OK ) { + ret = p->ops->decode( p, &p->sec_buf_in, &p->buf_in ); + + /* Drop the packet from the input buffer */ + sb_sasl_generic_drop_packet( p, sbiod->sbiod_sb->sb_debug ); + + if ( ret != 0 ) { ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, - "sb_sasl_read: failed to decode packet: %s\n", - sasl_errstring( ret, NULL, NULL ) ); - sb_sasl_drop_packet( &p->sec_buf_in, - sbiod->sbiod_sb->sb_debug ); - errno = EIO; + "sb_sasl_generic_read: failed to decode packet\n" ); + sock_errset(EIO); return -1; } - - /* Drop the packet from the input buffer */ - sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug ); - - p->buf_in.buf_size = p->buf_in.buf_end; bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len ); @@ -594,522 +675,126 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, vo } static ber_slen_t -sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) +sb_sasl_generic_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) { - struct sb_sasl_data *p; - int ret; + struct sb_sasl_generic_data *p; + int ret; + ber_len_t len2; assert( sbiod != NULL ); assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); - p = (struct sb_sasl_data *)sbiod->sbiod_pvt; + p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; - /* Are there anything left in the buffer? */ + /* Is there anything left in the buffer? */ if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { ret = ber_pvt_sb_do_write( sbiod, &p->buf_out ); - if ( ret <= 0 ) - return ret; + if ( ret < 0 ) return ret; + + /* Still have something left?? */ + if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { + sock_errset(EAGAIN); + return -1; + } + } + + len2 = p->max_send - 100; /* For safety margin */ + len2 = len > len2 ? len2 : len; + + /* If we're just retrying a partial write, tell the + * caller it's done. Let them call again if there's + * still more left to write. + */ + if ( p->flags & LDAP_PVT_SASL_PARTIAL_WRITE ) { + p->flags ^= LDAP_PVT_SASL_PARTIAL_WRITE; + return len2; } /* now encode the next packet. */ - ber_pvt_sb_buf_destroy( &p->buf_out ); - ret = sasl_encode( p->sasl_context, buf, len, &p->buf_out.buf_base, - (unsigned *)&p->buf_out.buf_size ); - if ( ret != SASL_OK ) { + p->ops->reset_buf( p, &p->buf_out ); + + ret = p->ops->encode( p, buf, len2, &p->buf_out ); + + if ( ret != 0 ) { ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug, - "sb_sasl_write: failed to encode packet: %s\n", - sasl_errstring( ret, NULL, NULL ) ); + "sb_sasl_generic_write: failed to encode packet\n" ); + sock_errset(EIO); return -1; } - p->buf_out.buf_end = p->buf_out.buf_size; ret = ber_pvt_sb_do_write( sbiod, &p->buf_out ); - if ( ret <= 0 ) + + if ( ret < 0 ) { + /* error? */ + int err = sock_errno(); + /* caller can retry this */ + if ( err == EAGAIN || err == EWOULDBLOCK || err == EINTR ) + p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; return ret; - return len; + } else if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) { + /* partial write? pretend nothing got written */ + len2 = 0; + p->flags |= LDAP_PVT_SASL_PARTIAL_WRITE; + } + + /* return number of bytes encoded, not written, to ensure + * no byte is encoded twice (even if only sent once). + */ + return len2; } static int -sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) +sb_sasl_generic_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) { - struct sb_sasl_data *p; + struct sb_sasl_generic_data *p; - p = (struct sb_sasl_data *)sbiod->sbiod_pvt; + p = (struct sb_sasl_generic_data *)sbiod->sbiod_pvt; if ( opt == LBER_SB_OPT_DATA_READY ) { - if ( p->buf_in.buf_ptr != p->buf_in.buf_end ) - return 1; + if ( p->buf_in.buf_ptr != p->buf_in.buf_end ) return 1; } - + return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg ); } -Sockbuf_IO ldap_pvt_sockbuf_io_sasl = -{ - sb_sasl_setup, /* sbi_setup */ - sb_sasl_remove, /* sbi_remove */ - sb_sasl_ctrl, /* sbi_ctrl */ - sb_sasl_read, /* sbi_read */ - sb_sasl_write, /* sbi_write */ +Sockbuf_IO ldap_pvt_sockbuf_io_sasl_generic = { + sb_sasl_generic_setup, /* sbi_setup */ + sb_sasl_generic_remove, /* sbi_remove */ + sb_sasl_generic_ctrl, /* sbi_ctrl */ + sb_sasl_generic_read, /* sbi_read */ + sb_sasl_generic_write, /* sbi_write */ NULL /* sbi_close */ }; -int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg ) +int ldap_pvt_sasl_generic_install( + Sockbuf *sb, + struct sb_sasl_generic_install *install_arg ) { + Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_generic_install\n", + 0, 0, 0 ); + /* don't install the stuff unless security has been negotiated */ if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, - &ldap_pvt_sockbuf_io_sasl ) ) - ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl, - LBER_SBIOD_LEVEL_APPLICATION, ctx_arg ); - - return LDAP_SUCCESS; -} - -static int -sasl_err2ldap( int saslerr ) -{ - int rc; - - switch (saslerr) { - case SASL_CONTINUE: - rc = LDAP_MORE_RESULTS_TO_RETURN; - break; - case SASL_OK: - rc = LDAP_SUCCESS; - break; - case SASL_FAIL: - rc = LDAP_LOCAL_ERROR; - break; - case SASL_NOMEM: - rc = LDAP_NO_MEMORY; - break; - case SASL_NOMECH: - rc = LDAP_AUTH_UNKNOWN; - break; - case SASL_BADAUTH: - rc = LDAP_AUTH_UNKNOWN; - break; - case SASL_NOAUTHZ: - rc = LDAP_PARAM_ERROR; - break; - case SASL_TOOWEAK: - case SASL_ENCRYPT: - rc = LDAP_AUTH_UNKNOWN; - break; - default: - rc = LDAP_LOCAL_ERROR; - break; - } - - assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) ); - return rc; -} - -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, NULL, LDAP_SCOPE_BASE, - NULL, attrs, 0, &res ); - - if ( rc != LDAP_SUCCESS ) { - return ld->ld_errno; - } - - e = ldap_first_entry( ld, res ); - if ( e == NULL ) { - if ( ld->ld_errno == LDAP_SUCCESS ) { - ld->ld_errno = LDAP_UNAVAILABLE; - } - return ld->ld_errno; - } - - values = ldap_get_values( ld, e, "supportedSASLMechanisms" ); - if ( values == NULL ) { - ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE; - ldap_msgfree( res ); - return ld->ld_errno; + &ldap_pvt_sockbuf_io_sasl_generic ) ) + { +#ifdef LDAP_DEBUG + ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug, + LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_generic_" ); +#endif + ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl_generic, + LBER_SBIOD_LEVEL_APPLICATION, install_arg ); } - mechlist = array2str( values ); - if ( mechlist == NULL ) { - ld->ld_errno = LDAP_NO_MEMORY; - LDAP_VFREE( values ); - ldap_msgfree( res ); - return ld->ld_errno; - } - - LDAP_VFREE( values ); - ldap_msgfree( res ); - - *pmechlist = mechlist; - return LDAP_SUCCESS; } -int -ldap_pvt_sasl_bind( - LDAP *ld, - LDAP_CONST char *dn, - LDAP_CONST char *mechs, - LDAP_CONST sasl_callback_t *callbacks, - LDAPControl **sctrls, - LDAPControl **cctrls ) -{ - const char *mech; - int saslrc, rc; - sasl_ssf_t *ssf = NULL; - unsigned credlen; - struct berval ccred, *scred; - char *host; - sasl_interact_t *client_interact = NULL; - struct sockaddr_in sin; - socklen_t len; - sasl_security_properties_t secprops; - ber_socket_t sd; - - Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_bind\n", 0, 0, 0 ); - - /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */ - if (ld->ld_version < LDAP_VERSION3) { - ld->ld_errno = LDAP_NOT_SUPPORTED; - return ld->ld_errno; - } - - ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd ); - - if ( sd == AC_SOCKET_INVALID ) { - /* not connected yet */ - int rc = ldap_open_defconn( ld ); - - if( rc < 0 ) return ld->ld_errno; - ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd ); - } - - /* XXX this doesn't work with PF_LOCAL hosts */ - host = ldap_host_connected_to( ld->ld_sb ); - - if ( host == NULL ) { - ld->ld_errno = LDAP_UNAVAILABLE; - return ld->ld_errno; - } - - if ( ld->ld_sasl_context != NULL ) { - sasl_dispose( &ld->ld_sasl_context ); - } - - saslrc = sasl_client_new( "ldap", host, callbacks, SASL_SECURITY_LAYER, - &ld->ld_sasl_context ); - - LDAP_FREE( host ); - - if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) { - ld->ld_errno = sasl_err2ldap( saslrc ); - sasl_dispose( &ld->ld_sasl_context ); - return ld->ld_errno; - } - - len = sizeof( sin ); - if ( getpeername( sd, (struct sockaddr *)&sin, &len ) == -1 ) { - Debug( LDAP_DEBUG_ANY, "SASL: can't query remote IP.\n", - 0, 0, 0 ); - ld->ld_errno = LDAP_OPERATIONS_ERROR; - return ld->ld_errno; - } - sasl_setprop( ld->ld_sasl_context, SASL_IP_REMOTE, &sin ); - - len = sizeof( sin ); - if ( getsockname( sd, (struct sockaddr *)&sin, &len ) == -1 ) { - Debug( LDAP_DEBUG_ANY, "SASL: can't query local IP.\n", - 0, 0, 0 ); - ld->ld_errno = LDAP_OPERATIONS_ERROR; - return ld->ld_errno; - } - sasl_setprop( ld->ld_sasl_context, SASL_IP_LOCAL, &sin ); - - memset( &secprops, '\0', sizeof( secprops ) ); - secprops.min_ssf = ld->ld_options.ldo_sasl_minssf; - secprops.max_ssf = ld->ld_options.ldo_sasl_maxssf; - secprops.security_flags = SASL_SECURITY_LAYER; - secprops.maxbufsize = 65536; - sasl_setprop( ld->ld_sasl_context, SASL_SEC_PROPS, &secprops ); - - ccred.bv_val = NULL; - ccred.bv_len = 0; - - saslrc = sasl_client_start( ld->ld_sasl_context, - mechs, - NULL, - &client_interact, - &ccred.bv_val, - &credlen, - &mech ); - - ccred.bv_len = credlen; - - if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) { - ld->ld_errno = sasl_err2ldap( saslrc ); - sasl_dispose( &ld->ld_sasl_context ); - return ld->ld_errno; - } - - scred = NULL; - - do { - unsigned credlen; - sasl_interact_t *client_interact = NULL; - - rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred ); - if ( rc == LDAP_SUCCESS ) { - break; - } else if ( rc != LDAP_SASL_BIND_IN_PROGRESS ) { - if ( ccred.bv_val != NULL ) { - LDAP_FREE( ccred.bv_val ); - } - sasl_dispose( &ld->ld_sasl_context ); - return ld->ld_errno; - } - - if ( ccred.bv_val != NULL ) { - LDAP_FREE( ccred.bv_val ); - ccred.bv_val = NULL; - } - - saslrc = sasl_client_step( ld->ld_sasl_context, - (scred == NULL) ? NULL : scred->bv_val, - (scred == NULL) ? 0 : scred->bv_len, - &client_interact, - &ccred.bv_val, - &credlen ); - - ccred.bv_len = credlen; - ber_bvfree( scred ); - - if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) { - ld->ld_errno = sasl_err2ldap( saslrc ); - sasl_dispose( &ld->ld_sasl_context ); - return ld->ld_errno; - } - } while ( rc == LDAP_SASL_BIND_IN_PROGRESS ); - - assert ( rc == LDAP_SUCCESS ); - - if ( sasl_getprop( ld->ld_sasl_context, SASL_SSF, (void **)&ssf ) - == SASL_OK && ssf && *ssf ) { - ldap_pvt_sasl_install( ld->ld_sb, ld->ld_sasl_context ); - } - - return rc; -} - -/* based on sample/sample-client.c */ -static int -ldap_pvt_sasl_getsecret(sasl_conn_t *conn, - void *context, int id, sasl_secret_t **psecret) -{ - struct berval *passphrase = (struct berval *)context; - size_t len; - - if ( conn == NULL || psecret == NULL || id != SASL_CB_PASS ) { - return SASL_BADPARAM; - } - - len = (passphrase != NULL) ? (size_t)passphrase->bv_len: 0; - - *psecret = (sasl_secret_t *) LDAP_MALLOC( sizeof( sasl_secret_t ) + len ); - if ( *psecret == NULL ) { - return SASL_NOMEM; - } - - (*psecret)->len = passphrase->bv_len; - - if ( passphrase != NULL ) { - memcpy((*psecret)->data, passphrase->bv_val, len); - } - - return SASL_OK; -} - -static int -ldap_pvt_sasl_getsimple(void *context, int id, const char **result, int *len) -{ - const char *value = (const char *)context; - - if ( result == NULL ) { - return SASL_BADPARAM; - } - - switch ( id ) { - case SASL_CB_USER: - case SASL_CB_AUTHNAME: - *result = value; - if ( len ) - *len = value ? strlen( value ) : 0; - break; - case SASL_CB_LANGUAGE: - *result = NULL; - if ( len ) - *len = 0; - break; - default: - return SASL_BADPARAM; - } - - return SASL_OK; -} - -int -ldap_pvt_sasl_get_option( LDAP *ld, int option, void *arg ) -{ - sasl_ssf_t *ssf; - - if ( ld == NULL ) - return -1; - - switch ( option ) { - case LDAP_OPT_X_SASL_MINSSF: - *(int *)arg = ld->ld_options.ldo_sasl_minssf; - break; - case LDAP_OPT_X_SASL_MAXSSF: - *(int *)arg = ld->ld_options.ldo_sasl_maxssf; - break; - case LDAP_OPT_X_SASL_ACTSSF: - if ( ld->ld_sasl_context == NULL ) { - *(int *)arg = -1; - break; - } - if ( sasl_getprop( ld->ld_sasl_context, SASL_SSF, - (void **) &ssf ) != SASL_OK ) - { - return -1; - } - *(int *)arg = *ssf; - break; - default: - return -1; - } - return 0; -} - -int -ldap_pvt_sasl_set_option( LDAP *ld, int option, void *arg ) +void ldap_pvt_sasl_generic_remove( Sockbuf *sb ) { - if ( ld == NULL ) - return -1; - - switch ( option ) { - case LDAP_OPT_X_SASL_MINSSF: - ld->ld_options.ldo_sasl_minssf = *(int *)arg; - break; - case LDAP_OPT_X_SASL_MAXSSF: - ld->ld_options.ldo_sasl_maxssf = *(int *)arg; - break; - case LDAP_OPT_X_SASL_ACTSSF: - /* This option is read-only */ - default: - return -1; - } - return 0; -} - -/* - * ldap_negotiated_sasl_bind_s - bind to the ldap server (and X.500) - * using SASL authentication. - * - * This routine attempts to authenticate the user referred by the - * authentication id using the provided password. An optional - * authorization identity may be provided. An DN is generally not - * provided [see AuthMethod]. - * - * If the mechanism negotiated does not require a password, the - * passwd field is ignored. [A callback mechanism should really - * be used]. - * - * LDAP_SUCCESS is returned upon success, the ldap error code - * otherwise. - * - * Examples: - * ldap_negotiated_sasl_bind_s( ld, NULL, - * NULL, NULL, NULL, - * NULL, NULL, NULL, NULL ); - * - * ldap_negotiated_sasl_bind_s( ld, NULL, - * "user@OPENLDAP.ORG", NULL, NULL, - * "GSSAPI", NULL, NULL, NULL ); - * - * ldap_negotiated_sasl_bind_s( ld, NULL, - * "manager", "dn:cn=user,dc=openldap,dc=org", NULL, - * "DIGEST-MD5", NULL, NULL, NULL ); - * - * ldap_negotiated_sasl_bind_s( ld, NULL, - * "root@OPENLDAP.ORG", "u:user@OPENLDAP.ORG", NULL, - * "GSSAPI", NULL, NULL, NULL ); - * - * ldap_negotiated_sasl_bind_s( ld, NULL, - * "manager", "dn:cn=user,dc=openldap,dc=org", NULL, - * "DIGEST-MD5", NULL, NULL, NULL ); - */ -int -ldap_negotiated_sasl_bind_s( - LDAP *ld, - LDAP_CONST char *dn, /* usually NULL */ - LDAP_CONST char *authenticationId, - LDAP_CONST char *authorizationId, /* commonly NULL */ - LDAP_CONST char *saslMechanism, - struct berval *passPhrase, - LDAPControl **serverControls, - LDAPControl **clientControls) -{ - int n; - sasl_callback_t callbacks[4]; - int rc; - - Debug( LDAP_DEBUG_TRACE, "ldap_negotiated_sasl_bind_s\n", 0, 0, 0 ); - - if( saslMechanism == NULL || *saslMechanism == '\0' ) { - char *mechs; - rc = ldap_pvt_sasl_getmechs( ld, &mechs ); - - if( rc != LDAP_SUCCESS ) { - return rc; - } - - saslMechanism = mechs; - } - - /* SASL Authentication Identity */ - callbacks[n=0].id = SASL_CB_AUTHNAME; - callbacks[n].proc = ldap_pvt_sasl_getsimple; - callbacks[n].context = (void *)authenticationId; - - /* SASL Authorization Identity (userid) */ - if( authorizationId != NULL ) { - callbacks[++n].id = SASL_CB_USER; - callbacks[n].proc = ldap_pvt_sasl_getsimple; - callbacks[n].context = (void *)authorizationId; - } - - callbacks[++n].id = SASL_CB_PASS; - callbacks[n].proc = ldap_pvt_sasl_getsecret; - callbacks[n].context = (void *)passPhrase; - - callbacks[++n].id = SASL_CB_LIST_END; - callbacks[n].proc = NULL; - callbacks[n].context = NULL; - - assert( n * sizeof(sasl_callback_t) < sizeof(callbacks) ); - - rc = ldap_pvt_sasl_bind(ld, dn, saslMechanism, callbacks, - serverControls, clientControls); - - return rc; + ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl_generic, + LBER_SBIOD_LEVEL_APPLICATION ); +#ifdef LDAP_DEBUG + ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug, + LBER_SBIOD_LEVEL_APPLICATION ); +#endif } -#endif /* HAVE_CYRUS_SASL */