/* $OpenLDAP: pkg/ldap/libraries/libldap/cyrus.c,v 1.112.2.16 2007/01/02 21:43:48 kurt Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2007 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>.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/errno.h>
#include <ac/ctype.h>
#include <ac/unistd.h>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#include "ldap-int.h"
#ifdef HAVE_CYRUS_SASL
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifndef INT_MAX
#define INT_MAX 2147483647 /* 32 bit signed max */
#endif
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_t ldap_int_sasl_mutex;
#endif
#ifdef HAVE_SASL_SASL_H
#include <sasl/sasl.h>
#else
#include <sasl.h>
#endif
#if SASL_VERSION_MAJOR >= 2
#define SASL_CONST const
#else
#define SASL_CONST
#endif
/*
* Various Cyrus SASL related stuff.
*/
static const sasl_callback_t client_callbacks[] = {
#ifdef SASL_CB_GETREALM
{ SASL_CB_GETREALM, NULL, NULL },
#endif
{ SASL_CB_USER, NULL, NULL },
{ SASL_CB_AUTHNAME, NULL, NULL },
{ SASL_CB_PASS, NULL, NULL },
{ SASL_CB_ECHOPROMPT, NULL, NULL },
{ SASL_CB_NOECHOPROMPT, NULL, NULL },
{ SASL_CB_LIST_END, NULL, NULL }
};
int ldap_int_sasl_init( void )
{
/* XXX not threadsafe */
static int sasl_initialized = 0;
#ifdef HAVE_SASL_VERSION
/* stringify the version number, sasl.h doesn't do it for us */
#define VSTR0(maj, min, pat) #maj "." #min "." #pat
#define VSTR(maj, min, pat) VSTR0(maj, min, pat)
#define SASL_VERSION_STRING VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
SASL_VERSION_STEP)
{ int rc;
sasl_version( NULL, &rc );
if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
(rc & 0xffff) < SASL_VERSION_STEP) {
char version[sizeof("xxx.xxx.xxxxx")];
sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
rc & 0xffff );
Debug( LDAP_DEBUG_ANY,
"ldap_int_sasl_init: SASL library version mismatch:"
" expected " SASL_VERSION_STRING ","
" got %s\n", version, 0, 0 );
return -1;
}
}
#endif
if ( sasl_initialized ) {
return 0;
}
/* SASL 2 takes care of its own memory completely internally */
#if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
sasl_set_alloc(
ber_memalloc,
ber_memcalloc,
ber_memrealloc,
ber_memfree );
#endif /* CSRIMALLOC */
#ifdef LDAP_R_COMPILE
sasl_set_mutex(
ldap_pvt_sasl_mutex_new,
ldap_pvt_sasl_mutex_lock,
ldap_pvt_sasl_mutex_unlock,
ldap_pvt_sasl_mutex_dispose );
#endif
if ( sasl_client_init( NULL ) == SASL_OK ) {
sasl_initialized = 1;
return 0;
}
#if SASL_VERSION_MAJOR < 2
/* A no-op to make sure we link with Cyrus 1.5 */
sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
#endif
return -1;
}
/*
* SASL encryption support for LBER Sockbufs
*/
struct sb_sasl_data {
sasl_conn_t *sasl_context;
unsigned *sasl_maxbuf;
Sockbuf_Buf sec_buf_in;
Sockbuf_Buf buf_in;
Sockbuf_Buf buf_out;
};
static int
sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
{
struct sb_sasl_data *p;
assert( sbiod != NULL );
p = LBER_MALLOC( sizeof( *p ) );
if ( p == NULL )
return -1;
p->sasl_context = (sasl_conn_t *)arg;
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, SASL_MIN_BUFF_SIZE ) < 0 ) {
LBER_FREE( p );
sock_errset(ENOMEM);
return -1;
}
sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
(SASL_CONST void **) &p->sasl_maxbuf );
sbiod->sbiod_pvt = p;
return 0;
}
static int
sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
{
struct sb_sasl_data *p;
assert( sbiod != NULL );
p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
#if SASL_VERSION_MAJOR >= 2
/*
* SASLv2 encode/decode buffers are managed by
* libsasl2. Ensure they are not freed by liblber.
*/
p->buf_in.buf_base = NULL;
p->buf_out.buf_base = NULL;
#endif
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 );
LBER_FREE( p );
sbiod->sbiod_pvt = NULL;
return 0;
}
static ber_len_t
sb_sasl_pkt_length( const unsigned char *buf, int debuglevel )
{
ber_len_t size;
assert( buf != NULL );
size = buf[0] << 24
| buf[1] << 16
| buf[2] << 8
| buf[3];
if ( size > SASL_MAX_BUFF_SIZE ) {
/* 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 );
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 )
{
ber_slen_t len;
len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
if ( len > 0 )
AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
sec_buf_in->buf_end, len );
if ( len >= 4 ) {
sec_buf_in->buf_end = sb_sasl_pkt_length(
(unsigned char *) sec_buf_in->buf_base, debuglevel);
}
else {
sec_buf_in->buf_end = 0;
}
sec_buf_in->buf_ptr = len;
}
static ber_slen_t
sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct sb_sasl_data *p;
ber_slen_t ret, bufptr;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
/* Are there anything left in the buffer? */
ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
bufptr = ret;
len -= ret;
if ( len == 0 )
return bufptr;
#if SASL_VERSION_MAJOR >= 2
ber_pvt_sb_buf_init( &p->buf_in );
#else
ber_pvt_sb_buf_destroy( &p->buf_in );
#endif
/* 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 +
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 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( (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 < (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;
/* Did we read the whole encrypted packet? */
while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
/* No, we have got only a part of it */
ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
p->sec_buf_in.buf_ptr, ret );
#ifdef EINTR
if ( ( ret < 0 ) && ( errno == EINTR ) )
continue;
#endif
if ( ret <= 0 )
return bufptr ? bufptr : ret;
p->sec_buf_in.buf_ptr += ret;
}
/* Decode the packet */
{
unsigned tmpsize = p->buf_in.buf_end;
ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
p->sec_buf_in.buf_end,
(SASL_CONST char **)&p->buf_in.buf_base,
(unsigned *)&tmpsize );
p->buf_in.buf_end = tmpsize;
}
/* Drop the packet from the input buffer */
sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug );
if ( ret != SASL_OK ) {
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 ) );
sock_errset(EIO);
return -1;
}
p->buf_in.buf_size = p->buf_in.buf_end;
bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
return bufptr;
}
static ber_slen_t
sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct sb_sasl_data *p;
int ret;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
/* Are 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;
/* Still have something left?? */
if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
sock_errset(EAGAIN);
return -1;
}
}
/* now encode the next packet. */
#if SASL_VERSION_MAJOR >= 2
ber_pvt_sb_buf_init( &p->buf_out );
#else
ber_pvt_sb_buf_destroy( &p->buf_out );
#endif
if ( len > *p->sasl_maxbuf - 100 ) {
len = *p->sasl_maxbuf - 100; /* For safety margin */
}
{
unsigned tmpsize = p->buf_out.buf_size;
ret = sasl_encode( p->sasl_context, buf, len,
(SASL_CONST char **)&p->buf_out.buf_base,
&tmpsize );
p->buf_out.buf_size = tmpsize;
}
if ( ret != SASL_OK ) {
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 ) );
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 );
/* return number of bytes encoded, not written, to ensure
* no byte is encoded twice (even if only sent once).
*/
return len;
}
static int
sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
{
struct sb_sasl_data *p;
p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
if ( opt == LBER_SB_OPT_DATA_READY ) {
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 */
NULL /* sbi_close */
};
int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
{
Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_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 ) )
{
#ifdef LDAP_DEBUG
ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
#endif
ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
}
return LDAP_SUCCESS;
}
void ldap_pvt_sasl_remove( Sockbuf *sb )
{
ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl,
LBER_SBIOD_LEVEL_APPLICATION );
#ifdef LDAP_DEBUG
ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
LBER_SBIOD_LEVEL_APPLICATION );
#endif
}
static int
sasl_err2ldap( int saslerr )
{
int rc;
/* map SASL errors to LDAP API errors returned by:
* sasl_client_new()
* SASL_OK, SASL_NOMECH, SASL_NOMEM
* sasl_client_start()
* SASL_OK, SASL_NOMECH, SASL_NOMEM, SASL_INTERACT
* sasl_client_step()
* SASL_OK, SASL_INTERACT, SASL_BADPROT, SASL_BADSERV
*/
switch (saslerr) {
case SASL_CONTINUE:
rc = LDAP_MORE_RESULTS_TO_RETURN;
break;
case SASL_INTERACT:
rc = LDAP_LOCAL_ERROR;
break;
case SASL_OK:
rc = LDAP_SUCCESS;
break;
case SASL_NOMEM:
rc = LDAP_NO_MEMORY;
break;
case SASL_NOMECH:
rc = LDAP_AUTH_UNKNOWN;
break;
case SASL_BADPROT:
rc = LDAP_DECODING_ERROR;
break;
case SASL_BADSERV:
rc = LDAP_AUTH_UNKNOWN;
break;
/* other codes */
case SASL_BADAUTH:
rc = LDAP_AUTH_UNKNOWN;
break;
case SASL_NOAUTHZ:
rc = LDAP_PARAM_ERROR;
break;
case SASL_FAIL:
rc = LDAP_LOCAL_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_int_sasl_open(
LDAP *ld,
LDAPConn *lc,
const char * host )
{
int rc;
sasl_conn_t *ctx;
assert( lc->lconn_sasl_authctx == NULL );
if ( host == NULL ) {
ld->ld_errno = LDAP_LOCAL_ERROR;
return ld->ld_errno;
}
if ( ldap_int_sasl_init() ) {
ld->ld_errno = LDAP_LOCAL_ERROR;
return ld->ld_errno;
}
#if SASL_VERSION_MAJOR >= 2
rc = sasl_client_new( "ldap", host, NULL, NULL,
client_callbacks, 0, &ctx );
#else
rc = sasl_client_new( "ldap", host, client_callbacks,
SASL_SECURITY_LAYER, &ctx );
#endif
if ( rc != SASL_OK ) {
ld->ld_errno = sasl_err2ldap( rc );
return ld->ld_errno;
}
Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
host, 0, 0 );
lc->lconn_sasl_authctx = ctx;
return LDAP_SUCCESS;
}
int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
{
sasl_conn_t *ctx = lc->lconn_sasl_authctx;
if( ctx != NULL ) {
sasl_dispose( &ctx );
if ( lc->lconn_sasl_sockctx &&
lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
ctx = lc->lconn_sasl_sockctx;
sasl_dispose( &ctx );
}
lc->lconn_sasl_sockctx = NULL;
lc->lconn_sasl_authctx = NULL;
}
return LDAP_SUCCESS;
}
int
ldap_int_sasl_bind(
LDAP *ld,
const char *dn,
const char *mechs,
LDAPControl **sctrls,
LDAPControl **cctrls,
unsigned flags,
LDAP_SASL_INTERACT_PROC *interact,
void * defaults )
{
char *data;
const char *mech = NULL;
const char *pmech = NULL;
int saslrc, rc;
sasl_ssf_t *ssf = NULL;
sasl_conn_t *ctx, *oldctx = NULL;
sasl_interact_t *prompts = NULL;
unsigned credlen;
struct berval ccred;
ber_socket_t sd;
void *ssl;
Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
mechs ? mechs : "<null>", 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;
}
rc = 0;
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
#endif
ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
if ( sd == AC_SOCKET_INVALID ) {
/* not connected yet */
rc = ldap_open_defconn( ld );
if ( rc == 0 ) {
ber_sockbuf_ctrl( ld->ld_defconn->lconn_sb,
LBER_SB_OPT_GET_FD, &sd );
if( sd == AC_SOCKET_INVALID ) {
ld->ld_errno = LDAP_LOCAL_ERROR;
rc = ld->ld_errno;
}
}
}
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
#endif
if( rc != 0 ) return ld->ld_errno;
oldctx = ld->ld_defconn->lconn_sasl_authctx;
/* If we already have an authentication context, clear it out */
if( oldctx ) {
if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
sasl_dispose( &oldctx );
}
ld->ld_defconn->lconn_sasl_authctx = NULL;
}
{
char *saslhost = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
"localhost" );
rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
LDAP_FREE( saslhost );
}
if ( rc != LDAP_SUCCESS ) return rc;
ctx = ld->ld_defconn->lconn_sasl_authctx;
/* Check for TLS */
ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
if ( ssl ) {
struct berval authid = BER_BVNULL;
ber_len_t fac;
fac = ldap_pvt_tls_get_strength( ssl );
/* failure is OK, we just can't use SASL EXTERNAL */
(void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
(void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
LDAP_FREE( authid.bv_val );
}
#if !defined(_WIN32)
/* Check for local */
if ( ldap_pvt_url_scheme2proto(
ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
{
char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
"cn=peercred,cn=external,cn=auth")];
sprintf( authid, "gidNumber=%d+uidNumber=%d,"
"cn=peercred,cn=external,cn=auth",
(int) getegid(), (int) geteuid() );
(void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
LDAP_PVT_SASL_LOCAL_SSF );
}
#endif
/* (re)set security properties */
sasl_setprop( ctx, SASL_SEC_PROPS,
&ld->ld_options.ldo_sasl_secprops );
ccred.bv_val = NULL;
ccred.bv_len = 0;
do {
saslrc = sasl_client_start( ctx,
mechs,
#if SASL_VERSION_MAJOR < 2
NULL,
#endif
&prompts,
(SASL_CONST char **)&ccred.bv_val,
&credlen,
&mech );
if( pmech == NULL && mech != NULL ) {
pmech = mech;
if( flags != LDAP_SASL_QUIET ) {
fprintf(stderr,
"SASL/%s authentication started\n",
pmech );
}
}
if( saslrc == SASL_INTERACT ) {
int res;
if( !interact ) break;
res = (interact)( ld, flags, defaults, prompts );
if( res != LDAP_SUCCESS ) break;
}
} while ( saslrc == SASL_INTERACT );
ccred.bv_len = credlen;
if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
rc = ld->ld_errno = sasl_err2ldap( saslrc );
#if SASL_VERSION_MAJOR >= 2
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
#endif
goto done;
}
do {
struct berval *scred;
unsigned credlen;
scred = NULL;
rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls,
&scred );
if ( ccred.bv_val != NULL ) {
#if SASL_VERSION_MAJOR < 2
LDAP_FREE( ccred.bv_val );
#endif
ccred.bv_val = NULL;
}
if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
if( scred ) {
/* and server provided us with data? */
Debug( LDAP_DEBUG_TRACE,
"ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
rc, saslrc, scred ? scred->bv_len : -1 );
ber_bvfree( scred );
scred = NULL;
}
rc = ld->ld_errno;
goto done;
}
if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
/* we're done, no need to step */
if( scred ) {
/* but we got additional data? */
#define KLUDGE_FOR_MSAD
#ifdef KLUDGE_FOR_MSAD
/*
* MSAD provides empty additional data in violation of LDAP
* technical specifications. As no existing SASL mechanism
* allows empty data with an outcome message, just ignore it
* for now. Hopefully MS will fix their bug before someone
* defines a mechanism with possibly empty additional data.
*/
if( scred->bv_len == 0 ) {
Debug( LDAP_DEBUG_ANY,
"ldap_int_sasl_bind: ignoring "
" bogus empty data provided with SASL outcome message.\n",
rc, saslrc, scred->bv_len );
ber_bvfree( scred );
} else
#endif
{
Debug( LDAP_DEBUG_TRACE,
"ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
rc, saslrc, scred->bv_len );
rc = ld->ld_errno = LDAP_LOCAL_ERROR;
ber_bvfree( scred );
goto done;
}
}
break;
}
do {
if( ! scred ) {
/* no data! */
Debug( LDAP_DEBUG_TRACE,
"ldap_int_sasl_bind: no data in step!\n",
0, 0, 0 );
}
saslrc = sasl_client_step( ctx,
(scred == NULL) ? NULL : scred->bv_val,
(scred == NULL) ? 0 : scred->bv_len,
&prompts,
(SASL_CONST char **)&ccred.bv_val,
&credlen );
Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
saslrc, 0, 0 );
if( saslrc == SASL_INTERACT ) {
int res;
if( !interact ) break;
res = (interact)( ld, flags, defaults, prompts );
if( res != LDAP_SUCCESS ) break;
}
} while ( saslrc == SASL_INTERACT );
ccred.bv_len = credlen;
ber_bvfree( scred );
if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
ld->ld_errno = sasl_err2ldap( saslrc );
#if SASL_VERSION_MAJOR >= 2
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
#endif
rc = ld->ld_errno;
goto done;
}
} while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
if ( rc != LDAP_SUCCESS ) goto done;
if ( saslrc != SASL_OK ) {
#if SASL_VERSION_MAJOR >= 2
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
#endif
rc = ld->ld_errno = sasl_err2ldap( saslrc );
goto done;
}
if( flags != LDAP_SASL_QUIET ) {
saslrc = sasl_getprop( ctx, SASL_USERNAME,
(SASL_CONST void **) &data );
if( saslrc == SASL_OK && data && *data ) {
fprintf( stderr, "SASL username: %s\n", data );
}
#if SASL_VERSION_MAJOR < 2
saslrc = sasl_getprop( ctx, SASL_REALM,
(SASL_CONST void **) &data );
if( saslrc == SASL_OK && data && *data ) {
fprintf( stderr, "SASL realm: %s\n", data );
}
#endif
}
saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
if( saslrc == SASL_OK ) {
if( flags != LDAP_SASL_QUIET ) {
fprintf( stderr, "SASL SSF: %lu\n",
(unsigned long) *ssf );
}
if( ssf && *ssf ) {
if( flags != LDAP_SASL_QUIET ) {
fprintf( stderr, "SASL installing layers\n" );
}
if ( ld->ld_defconn->lconn_sasl_sockctx ) {
oldctx = ld->ld_defconn->lconn_sasl_sockctx;
sasl_dispose( &oldctx );
ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
}
ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
ld->ld_defconn->lconn_sasl_sockctx = ctx;
}
}
ld->ld_defconn->lconn_sasl_authctx = ctx;
done:
return rc;
}
int
ldap_int_sasl_external(
LDAP *ld,
LDAPConn *conn,
const char * authid,
ber_len_t ssf )
{
int sc;
sasl_conn_t *ctx;
#if SASL_VERSION_MAJOR < 2
sasl_external_properties_t extprops;
#endif
ctx = conn->lconn_sasl_authctx;
if ( ctx == NULL ) {
return LDAP_LOCAL_ERROR;
}
#if SASL_VERSION_MAJOR >= 2
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
if ( sc == SASL_OK )
sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
#else
memset( &extprops, '\0', sizeof(extprops) );
extprops.ssf = ssf;
extprops.auth_id = (char *) authid;
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
(void *) &extprops );
#endif
if ( sc != SASL_OK ) {
return LDAP_LOCAL_ERROR;
}
return LDAP_SUCCESS;
}
#define GOT_MINSSF 1
#define GOT_MAXSSF 2
#define GOT_MAXBUF 4
static struct {
struct berval key;
int sflag;
int ival;
int idef;
} sprops[] = {
{ BER_BVC("none"), 0, 0, 0 },
{ BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
{ BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
{ BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
{ BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
{ BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
{ BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
{ BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
{ BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
{ BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
{ BER_BVNULL, 0, 0, 0 }
};
void ldap_pvt_sasl_secprops_unparse(
sasl_security_properties_t *secprops,
struct berval *out )
{
int i, l = 0;
int comma;
char *ptr;
if ( secprops == NULL || out == NULL ) {
return;
}
comma = 0;
for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
if ( sprops[i].ival ) {
int v = 0;
switch( sprops[i].ival ) {
case GOT_MINSSF: v = secprops->min_ssf; break;
case GOT_MAXSSF: v = secprops->max_ssf; break;
case GOT_MAXBUF: v = secprops->maxbufsize; break;
}
/* It is the default, ignore it */
if ( v == sprops[i].idef ) continue;
l += sprops[i].key.bv_len + 24;
} else if ( sprops[i].sflag ) {
if ( sprops[i].sflag & secprops->security_flags ) {
l += sprops[i].key.bv_len;
}
} else if ( secprops->security_flags == 0 ) {
l += sprops[i].key.bv_len;
}
if ( comma ) l++;
comma = 1;
}
l++;
out->bv_val = LDAP_MALLOC( l );
if ( out->bv_val == NULL ) {
out->bv_len = 0;
return;
}
ptr = out->bv_val;
comma = 0;
for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
if ( sprops[i].ival ) {
int v = 0;
switch( sprops[i].ival ) {
case GOT_MINSSF: v = secprops->min_ssf; break;
case GOT_MAXSSF: v = secprops->max_ssf; break;
case GOT_MAXBUF: v = secprops->maxbufsize; break;
}
/* It is the default, ignore it */
if ( v == sprops[i].idef ) continue;
if ( comma ) *ptr++ = ',';
ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
comma = 1;
} else if ( sprops[i].sflag ) {
if ( sprops[i].sflag & secprops->security_flags ) {
if ( comma ) *ptr++ = ',';
ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
comma = 1;
}
} else if ( secprops->security_flags == 0 ) {
if ( comma ) *ptr++ = ',';
ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
comma = 1;
}
}
out->bv_len = ptr - out->bv_val;
}
int ldap_pvt_sasl_secprops(
const char *in,
sasl_security_properties_t *secprops )
{
int i, j, l;
char **props;
unsigned sflags = 0;
int got_sflags = 0;
sasl_ssf_t max_ssf = 0;
int got_max_ssf = 0;
sasl_ssf_t min_ssf = 0;
int got_min_ssf = 0;
unsigned maxbufsize = 0;
int got_maxbufsize = 0;
if( secprops == NULL ) {
return LDAP_PARAM_ERROR;
}
props = ldap_str2charray( in, "," );
if( props == NULL ) {
return LDAP_PARAM_ERROR;
}
for( i=0; props[i]; i++ ) {
l = strlen( props[i] );
for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
if ( l < sprops[j].key.bv_len ) continue;
if ( strncasecmp( props[i], sprops[j].key.bv_val,
sprops[j].key.bv_len )) continue;
if ( sprops[j].ival ) {
unsigned v;
char *next = NULL;
if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
continue;
v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
switch( sprops[j].ival ) {
case GOT_MINSSF:
min_ssf = v; got_min_ssf++; break;
case GOT_MAXSSF:
max_ssf = v; got_max_ssf++; break;
case GOT_MAXBUF:
maxbufsize = v; got_maxbufsize++; break;
}
} else {
if ( props[i][sprops[j].key.bv_len] ) continue;
if ( sprops[j].sflag )
sflags |= sprops[j].sflag;
else
sflags = 0;
got_sflags++;
}
break;
}
if ( BER_BVISNULL( &sprops[j].key )) {
ldap_charray_free( props );
return LDAP_NOT_SUPPORTED;
}
}
if(got_sflags) {
secprops->security_flags = sflags;
}
if(got_min_ssf) {
secprops->min_ssf = min_ssf;
}
if(got_max_ssf) {
secprops->max_ssf = max_ssf;
}
if(got_maxbufsize) {
secprops->maxbufsize = maxbufsize;
}
ldap_charray_free( props );
return LDAP_SUCCESS;
}
int
ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
{
int rc;
switch( option ) {
case LDAP_OPT_X_SASL_SECPROPS:
rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
if( rc == LDAP_SUCCESS ) return 0;
}
return -1;
}
int
ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
{
if ( ld == NULL )
return -1;
switch ( option ) {
case LDAP_OPT_X_SASL_MECH: {
*(char **)arg = ld->ld_options.ldo_def_sasl_mech
? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
} break;
case LDAP_OPT_X_SASL_REALM: {
*(char **)arg = ld->ld_options.ldo_def_sasl_realm
? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
} break;
case LDAP_OPT_X_SASL_AUTHCID: {
*(char **)arg = ld->ld_options.ldo_def_sasl_authcid
? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
} break;
case LDAP_OPT_X_SASL_AUTHZID: {
*(char **)arg = ld->ld_options.ldo_def_sasl_authzid
? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
} break;
case LDAP_OPT_X_SASL_SSF: {
int sc;
sasl_ssf_t *ssf;
sasl_conn_t *ctx;
if( ld->ld_defconn == NULL ) {
return -1;
}
ctx = ld->ld_defconn->lconn_sasl_sockctx;
if ( ctx == NULL ) {
return -1;
}
sc = sasl_getprop( ctx, SASL_SSF,
(SASL_CONST void **) &ssf );
if ( sc != SASL_OK ) {
return -1;
}
*(ber_len_t *)arg = *ssf;
} break;
case LDAP_OPT_X_SASL_SSF_EXTERNAL:
/* this option is write only */
return -1;
case LDAP_OPT_X_SASL_SSF_MIN:
*(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
break;
case LDAP_OPT_X_SASL_SSF_MAX:
*(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
break;
case LDAP_OPT_X_SASL_MAXBUFSIZE:
*(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
break;
case LDAP_OPT_X_SASL_SECPROPS:
/* this option is write only */
return -1;
default:
return -1;
}
return 0;
}
int
ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
{
if ( ld == NULL )
return -1;
switch ( option ) {
case LDAP_OPT_X_SASL_SSF:
/* This option is read-only */
return -1;
case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
int sc;
#if SASL_VERSION_MAJOR < 2
sasl_external_properties_t extprops;
#endif
sasl_conn_t *ctx;
if( ld->ld_defconn == NULL ) {
return -1;
}
ctx = ld->ld_defconn->lconn_sasl_authctx;
if ( ctx == NULL ) {
return -1;
}
#if SASL_VERSION_MAJOR >= 2
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
#else
memset(&extprops, 0L, sizeof(extprops));
extprops.ssf = * (ber_len_t *) arg;
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
(void *) &extprops );
#endif
if ( sc != SASL_OK ) {
return -1;
}
} break;
case LDAP_OPT_X_SASL_SSF_MIN:
ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
break;
case LDAP_OPT_X_SASL_SSF_MAX:
ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
break;
case LDAP_OPT_X_SASL_MAXBUFSIZE:
ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
break;
case LDAP_OPT_X_SASL_SECPROPS: {
int sc;
sc = ldap_pvt_sasl_secprops( (char *) arg,
&ld->ld_options.ldo_sasl_secprops );
return sc == LDAP_SUCCESS ? 0 : -1;
}
default:
return -1;
}
return 0;
}
#ifdef LDAP_R_COMPILE
#define LDAP_DEBUG_R_SASL
void *ldap_pvt_sasl_mutex_new(void)
{
ldap_pvt_thread_mutex_t *mutex;
mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
sizeof(ldap_pvt_thread_mutex_t) );
if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
return mutex;
}
#ifndef LDAP_DEBUG_R_SASL
assert( 0 );
#endif /* !LDAP_DEBUG_R_SASL */
return NULL;
}
int ldap_pvt_sasl_mutex_lock(void *mutex)
{
#ifdef LDAP_DEBUG_R_SASL
if ( mutex == NULL ) {
return SASL_OK;
}
#else /* !LDAP_DEBUG_R_SASL */
assert( mutex != NULL );
#endif /* !LDAP_DEBUG_R_SASL */
return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
? SASL_FAIL : SASL_OK;
}
int ldap_pvt_sasl_mutex_unlock(void *mutex)
{
#ifdef LDAP_DEBUG_R_SASL
if ( mutex == NULL ) {
return SASL_OK;
}
#else /* !LDAP_DEBUG_R_SASL */
assert( mutex != NULL );
#endif /* !LDAP_DEBUG_R_SASL */
return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
? SASL_FAIL : SASL_OK;
}
void ldap_pvt_sasl_mutex_dispose(void *mutex)
{
#ifdef LDAP_DEBUG_R_SASL
if ( mutex == NULL ) {
return;
}
#else /* !LDAP_DEBUG_R_SASL */
assert( mutex != NULL );
#endif /* !LDAP_DEBUG_R_SASL */
(void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
LDAP_FREE( mutex );
}
#endif
#else
int ldap_int_sasl_init( void )
{ return LDAP_SUCCESS; }
int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
{ return LDAP_SUCCESS; }
int
ldap_int_sasl_bind(
LDAP *ld,
const char *dn,
const char *mechs,
LDAPControl **sctrls,
LDAPControl **cctrls,
unsigned flags,
LDAP_SASL_INTERACT_PROC *interact,
void * defaults )
{ return LDAP_NOT_SUPPORTED; }
int
ldap_int_sasl_external(
LDAP *ld,
LDAPConn *conn,
const char * authid,
ber_len_t ssf )
{ return LDAP_SUCCESS; }
#endif /* HAVE_CYRUS_SASL */
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