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openldap/servers/slapd/sasl.c
Howard Chu cef9fcf78b Fix check for "anonymous" in sasl_getdn
2002-04-27 03:44:23 +00:00

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/* $OpenLDAP$ */
/*
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <lber.h>
#include <ldap_log.h>
#include "slap.h"
#ifdef HAVE_CYRUS_SASL
#include <limits.h>
#ifdef HAVE_SASL_SASL_H
#include <sasl/sasl.h>
#else
#include <sasl.h>
#endif
#if SASL_VERSION_MAJOR >= 2
#include <lutil.h>
#define SASL_CONST const
#else
#define SASL_CONST
#endif
#include <ldap_pvt.h>
#ifdef SLAPD_SPASSWD
#include <lutil.h>
#endif
/* Flags for telling slap_sasl_getdn() what type of identity is being passed */
#define FLAG_GETDN_AUTHCID 2
#define FLAG_GETDN_AUTHZID 4
static sasl_security_properties_t sasl_secprops;
static int
slap_sasl_log(
void *context,
int priority,
const char *message)
{
Connection *conn = context;
int level;
const char * label;
if ( message == NULL ) {
return SASL_BADPARAM;
}
switch (priority) {
#if SASL_VERSION_MAJOR >= 2
case SASL_LOG_NONE:
level = LDAP_DEBUG_NONE;
label = "None";
break;
case SASL_LOG_ERR:
level = LDAP_DEBUG_ANY;
label = "Error";
break;
case SASL_LOG_FAIL:
level = LDAP_DEBUG_ANY;
label = "Failure";
break;
case SASL_LOG_WARN:
level = LDAP_DEBUG_TRACE;
label = "Warning";
break;
case SASL_LOG_NOTE:
level = LDAP_DEBUG_TRACE;
label = "Notice";
break;
case SASL_LOG_DEBUG:
level = LDAP_DEBUG_TRACE;
label = "Debug";
break;
case SASL_LOG_TRACE:
level = LDAP_DEBUG_TRACE;
label = "Trace";
break;
case SASL_LOG_PASS:
level = LDAP_DEBUG_TRACE;
label = "Password Trace";
break;
#else
case SASL_LOG_ERR:
level = LDAP_DEBUG_ANY;
label = "Error";
break;
case SASL_LOG_WARNING:
level = LDAP_DEBUG_TRACE;
label = "Warning";
break;
case SASL_LOG_INFO:
level = LDAP_DEBUG_TRACE;
label = "Info";
break;
#endif
default:
return SASL_BADPARAM;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"SASL [conn=%ld] %s: %s\n",
conn ? conn->c_connid : -1,
label, message ));
#else
Debug( level, "SASL [conn=%ld] %s: %s\n",
conn ? conn->c_connid: -1,
label, message );
#endif
return SASL_OK;
}
/* Take any sort of identity string and return a DN with the "dn:" prefix. The
string returned in *dn is in its own allocated memory, and must be free'd
by the calling process.
-Mark Adamson, Carnegie Mellon
The "dn:" prefix is no longer used anywhere inside slapd. It is only used
on strings passed in directly from SASL.
-Howard Chu, Symas Corp.
*/
#define SET_DN 1
#define SET_U 2
static struct berval ext_bv = { sizeof("EXTERNAL")-1, "EXTERNAL" };
int slap_sasl_getdn( Connection *conn, char *id, int len,
char *user_realm, struct berval *dn, int flags )
{
char *c1;
int rc, is_dn = 0, do_norm = 1;
sasl_conn_t *ctx;
struct berval dn2;
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_getdn: conn %d id=%s\n",
conn ? conn->c_connid : -1,
id ? (*id ? id : "<empty>") : "NULL" ));
#else
Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
id?(*id?id:"<empty>"):"NULL",0,0 );
#endif
dn->bv_val = NULL;
dn->bv_len = 0;
if ( id ) {
if ( len == 0 ) len = strlen( id );
/* Blatantly anonymous ID */
if ( len == sizeof("anonymous") - 1 &&
!strcasecmp( id, "anonymous" ) ) {
return( LDAP_SUCCESS );
}
} else {
len = 0;
}
ctx = conn->c_sasl_context;
/* An authcID needs to be converted to authzID form */
if( flags & FLAG_GETDN_AUTHCID ) {
if( conn->c_is_tls && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
&& ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 ) ) {
/* X.509 DN is already normalized */
do_norm = 0;
is_dn = SET_DN;
} else {
/* convert to u:<username> form */
is_dn = SET_U;
}
ber_str2bv( id, len, 1, dn );
}
if( !is_dn ) {
if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
is_dn = SET_U;
ber_str2bv( id+2, len-2, 1, dn );
} else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
is_dn = SET_DN;
ber_str2bv( id+3, len-3, 1, dn );
}
}
/* An authzID must be properly prefixed */
if( (flags & FLAG_GETDN_AUTHZID) && !is_dn ) {
free( dn->bv_val );
dn->bv_val = NULL;
dn->bv_len = 0;
return( LDAP_INAPPROPRIATE_AUTH );
}
/* Username strings */
if( is_dn == SET_U ) {
char *p;
len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
if( user_realm && *user_realm ) {
len += strlen( user_realm ) + sizeof(",cn=")-1;
}
if( conn->c_sasl_bind_mech.bv_len ) {
len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
}
/* Build the new dn */
c1 = dn->bv_val;
dn->bv_val = ch_malloc( len+1 );
p = slap_strcopy( dn->bv_val, "uid=" );
p = slap_strcopy( p, c1 );
ch_free( c1 );
if( user_realm && *user_realm ) {
p = slap_strcopy( p, ",cn=" );
p = slap_strcopy( p, user_realm );
}
if( conn->c_sasl_bind_mech.bv_len ) {
p = slap_strcopy( p, ",cn=" );
p = slap_strcopy( p, conn->c_sasl_bind_mech.bv_val );
}
p = slap_strcopy( p, ",cn=auth" );
dn->bv_len = p - dn->bv_val;
is_dn = SET_DN;
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val ));
#else
Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
#endif
}
/* DN strings that are a cn=auth identity to run through regexp */
if( is_dn == SET_DN )
{
slap_sasl2dn( dn, &dn2 );
if( dn2.bv_val ) {
ch_free( dn->bv_val );
*dn = dn2;
do_norm = 0; /* slap_sasl2dn normalizes */
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val ));
#else
Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
dn->bv_val, 0, 0 );
#endif
}
}
if ( do_norm ) {
rc = dnNormalize2( NULL, dn, &dn2 );
free(dn->bv_val);
if ( rc != LDAP_SUCCESS ) {
*dn = slap_empty_bv;
return rc;
}
*dn = dn2;
}
return( LDAP_SUCCESS );
}
#if SASL_VERSION_MAJOR >= 2
static int
slap_sasl_checkpass(
sasl_conn_t *sconn,
void *context,
const char *username,
const char *pass,
unsigned passlen,
struct propctx *propctx)
{
Connection *conn = (Connection *)context;
struct berval dn, cred;
int rc;
BerVarray vals, bv;
cred.bv_val = (char *)pass;
cred.bv_len = passlen;
/* SASL will fallback to its own mechanisms if we don't
* find an answer here.
*/
rc = slap_sasl_getdn( conn, (char *)username, 0, NULL, &dn,
FLAG_GETDN_AUTHCID );
if ( rc != LDAP_SUCCESS ) {
sasl_seterror( sconn, 0, ldap_err2string( rc ) );
return SASL_NOUSER;
}
if ( dn.bv_len == 0 ) {
sasl_seterror( sconn, 0,
"No password is associated with the Root DSE" );
if ( dn.bv_val != NULL ) {
ch_free( dn.bv_val );
}
return SASL_NOUSER;
}
rc = backend_attribute( NULL, NULL, NULL, NULL, &dn,
slap_schema.si_ad_userPassword, &vals);
if ( rc != LDAP_SUCCESS ) {
ch_free( dn.bv_val );
sasl_seterror( sconn, 0, ldap_err2string( rc ) );
return SASL_NOVERIFY;
}
rc = SASL_NOVERIFY;
if ( vals != NULL ) {
for ( bv = vals; bv->bv_val != NULL; bv++ ) {
if ( !lutil_passwd( bv, &cred, NULL ) ) {
rc = SASL_OK;
break;
}
}
ber_bvarray_free( vals );
}
if ( rc != SASL_OK ) {
sasl_seterror( sconn, 0,
ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
}
ch_free( dn.bv_val );
return rc;
}
#if 0 /* CANON isn't for what you think it does. */
static int
slap_sasl_canonicalize(
sasl_conn_t *sconn,
void *context,
const char *in,
unsigned inlen,
unsigned flags,
const char *user_realm,
char *out,
unsigned out_max,
unsigned *out_len)
{
Connection *conn = (Connection *)context;
struct berval dn;
int rc;
*out_len = 0;
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
conn ? conn->c_connid : -1,
(flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
in ? in : "<empty>" ));
#else
Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
"%s=\"%s\"\n",
conn ? conn->c_connid : -1,
(flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
in ? in : "<empty>" );
#endif
rc = slap_sasl_getdn( conn, (char *)in, inlen, (char *)user_realm, &dn,
(flags == SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
if ( rc != LDAP_SUCCESS ) {
sasl_seterror( sconn, 0, ldap_err2string( rc ) );
return SASL_NOAUTHZ;
}
if ( out_max < dn.bv_len ) {
return SASL_BUFOVER;
}
AC_MEMCPY( out, dn.bv_val, dn.bv_len );
out[dn.bv_len] = '\0';
*out_len = dn.bv_len;
ch_free( dn.bv_val );
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
conn ? conn->c_connid : -1,
(flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
out ));
#else
Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
"%s=\"%s\"\n",
conn ? conn->c_connid : -1,
(flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
out );
#endif
return SASL_OK;
}
#endif
#define CANON_BUF_SIZE 256 /* from saslint.h */
static int
slap_sasl_authorize(
sasl_conn_t *sconn,
void *context,
char *requested_user,
unsigned rlen,
char *auth_identity,
unsigned alen,
const char *def_realm,
unsigned urlen,
struct propctx *propctx)
{
Connection *conn = (Connection *)context;
struct berval authcDN, authzDN;
char *realm;
int rc, equal = 1, ext = 0;
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
conn ? conn->c_connid : -1, auth_identity, requested_user));
#else
Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
"authcid=\"%s\" authzid=\"%s\"\n",
conn ? conn->c_connid : -1, auth_identity, requested_user );
#endif
if ( requested_user )
equal = !strcmp( auth_identity, requested_user );
/* If using SASL-EXTERNAL, don't modify the ID in any way */
if ( conn->c_is_tls && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
&& ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 ) ) {
ext = 1;
realm = NULL;
} else {
/* Else look for an embedded realm in the name */
realm = strchr( auth_identity, '@' );
if ( realm ) *realm++ = '\0';
}
rc = slap_sasl_getdn( conn, auth_identity, alen, realm ? realm : (char *)def_realm,
&authcDN, FLAG_GETDN_AUTHCID );
if ( realm )
realm[-1] = '@';
if ( rc != LDAP_SUCCESS ) {
sasl_seterror( sconn, 0, ldap_err2string( rc ) );
return SASL_NOAUTHZ;
}
if ( equal ) {
if ( authcDN.bv_len > CANON_BUF_SIZE ) {
free( authcDN.bv_val );
return SASL_BUFOVER;
}
AC_MEMCPY( requested_user, authcDN.bv_val, authcDN.bv_len );
return SASL_OK;
}
if ( ext ) {
realm = NULL;
} else {
realm = strchr( requested_user, '@' );
if ( realm ) *realm++ = '\0';
}
rc = slap_sasl_getdn( conn, requested_user, rlen, realm ? realm : (char *)def_realm,
&authzDN, FLAG_GETDN_AUTHZID );
if ( realm )
realm[-1] = '@';
if ( rc != LDAP_SUCCESS ) {
free( authcDN.bv_val );
sasl_seterror( sconn, 0, ldap_err2string( rc ) );
return SASL_NOAUTHZ;
}
if (authzDN.bv_len > CANON_BUF_SIZE) {
free( authcDN.bv_val );
free( authzDN.bv_val );
return SASL_BUFOVER;
}
rc = slap_sasl_authorized( &authcDN, &authzDN );
free( authcDN.bv_val );
if ( rc != LDAP_SUCCESS ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
"slap_sasl_authorize: conn %ld authorization disallowed (%d)\n",
(long)(conn ? conn->c_connid : -1), rc ));
#else
Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
" authorization disallowed (%d)\n",
(long) (conn ? conn->c_connid : -1), rc, 0 );
#endif
sasl_seterror( sconn, 0, "not authorized" );
free( authzDN.bv_val );
return SASL_NOAUTHZ;
}
AC_MEMCPY( requested_user, authzDN.bv_val, authzDN.bv_len );
free( authzDN.bv_val );
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_authorize: conn %d authorization allowed\n",
(long)(conn ? conn->c_connid : -1 ) ));
#else
Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
" authorization allowed\n",
(long) (conn ? conn->c_connid : -1), 0, 0 );
#endif
return SASL_OK;
}
#else
static int
slap_sasl_authorize(
void *context,
char *authcid,
char *authzid,
const char **user,
const char **errstr)
{
struct berval authcDN, authzDN;
int rc, ext = 0;
Connection *conn = context;
char *realm, *xrealm;
*user = NULL;
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
conn ? conn->c_connid : -1,
authcid ? authcid : "<empty>",
authzid ? authzid : "<empty>" ));
#else
Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
"authcid=\"%s\" authzid=\"%s\"\n",
(long) (conn ? conn->c_connid : -1),
authcid ? authcid : "<empty>",
authzid ? authzid : "<empty>" );
#endif
/* Figure out how much data we have for the dn */
rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
if( rc != SASL_OK && rc != SASL_NOTDONE ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
"slap_sasl_authorize: getprop(REALM) failed.\n" ));
#else
Debug(LDAP_DEBUG_TRACE,
"authorize: getprop(REALM) failed!\n", 0,0,0);
#endif
*errstr = "Could not extract realm";
return SASL_NOAUTHZ;
}
/* Convert the identities to DN's. If no authzid was given, client will
be bound as the DN matching their username */
if ( conn->c_is_tls && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
&& ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 ) ) {
ext = 1;
xrealm = NULL;
} else {
xrealm = strchr( authcid, '@' );
if ( xrealm ) *xrealm++ = '\0';
}
rc = slap_sasl_getdn( conn, (char *)authcid, 0, xrealm ? xrealm : realm, &authcDN, FLAG_GETDN_AUTHCID );
if ( xrealm ) xrealm[-1] = '@';
if( rc != LDAP_SUCCESS ) {
*errstr = ldap_err2string( rc );
return SASL_NOAUTHZ;
}
if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_authorize: conn %d Using authcDN=%s\n",
conn ? conn->c_connid : -1, authcDN.bv_val ));
#else
Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
"Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
#endif
*user = authcDN.bv_val;
*errstr = NULL;
return SASL_OK;
}
if ( ext ) {
xrealm = NULL;
} else {
xrealm = strchr( authzid, '@' );
if ( xrealm ) *xrealm++ = '\0';
}
rc = slap_sasl_getdn( conn, (char *)authzid, 0, xrealm ? xrealm : realm, &authzDN, FLAG_GETDN_AUTHZID );
if ( xrealm ) xrealm[-1] = '@';
if( rc != LDAP_SUCCESS ) {
ch_free( authcDN.bv_val );
*errstr = ldap_err2string( rc );
return SASL_NOAUTHZ;
}
rc = slap_sasl_authorized( &authcDN, &authzDN );
if( rc ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
"slap_sasl_authorize: conn %ld authorization disallowed (%d)\n",
(long)(conn ? conn->c_connid : -1), rc ));
#else
Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
" authorization disallowed (%d)\n",
(long) (conn ? conn->c_connid : -1), rc, 0 );
#endif
*errstr = "not authorized";
ch_free( authcDN.bv_val );
ch_free( authzDN.bv_val );
return SASL_NOAUTHZ;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_authorize: conn %d authorization allowed\n",
(long)(conn ? conn->c_connid : -1 ) ));
#else
Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
" authorization allowed\n",
(long) (conn ? conn->c_connid : -1), 0, 0 );
#endif
ch_free( authcDN.bv_val );
*user = authzDN.bv_val;
*errstr = NULL;
return SASL_OK;
}
#endif /* SASL_VERSION_MAJOR >= 2 */
static int
slap_sasl_err2ldap( int saslerr )
{
int rc;
switch (saslerr) {
case SASL_CONTINUE:
rc = LDAP_SASL_BIND_IN_PROGRESS;
break;
case SASL_FAIL:
rc = LDAP_OTHER;
break;
case SASL_NOMEM:
rc = LDAP_OTHER;
break;
case SASL_NOMECH:
rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
break;
case SASL_BADAUTH:
rc = LDAP_INVALID_CREDENTIALS;
break;
case SASL_NOAUTHZ:
rc = LDAP_INSUFFICIENT_ACCESS;
break;
case SASL_TOOWEAK:
case SASL_ENCRYPT:
rc = LDAP_INAPPROPRIATE_AUTH;
break;
default:
rc = LDAP_OTHER;
break;
}
return rc;
}
#endif
int slap_sasl_init( void )
{
#ifdef HAVE_CYRUS_SASL
int rc;
static sasl_callback_t server_callbacks[] = {
{ SASL_CB_LOG, &slap_sasl_log, NULL },
{ SASL_CB_LIST_END, NULL, NULL }
};
sasl_set_alloc(
ch_malloc,
ch_calloc,
ch_realloc,
ch_free );
sasl_set_mutex(
ldap_pvt_sasl_mutex_new,
ldap_pvt_sasl_mutex_lock,
ldap_pvt_sasl_mutex_unlock,
ldap_pvt_sasl_mutex_dispose );
/* should provide callbacks for logging */
/* server name should be configurable */
rc = sasl_server_init( server_callbacks, "slapd" );
if( rc != SASL_OK ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
"slap_sasl_init: init failed.\n" ));
#else
Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
0, 0, 0 );
#endif
return -1;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
"slap_sasl_init: initialized!\n"));
#else
Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
0, 0, 0 );
#endif
/* default security properties */
memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
sasl_secprops.max_ssf = INT_MAX;
sasl_secprops.maxbufsize = 65536;
sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
#endif
return 0;
}
int slap_sasl_destroy( void )
{
#ifdef HAVE_CYRUS_SASL
sasl_done();
#endif
free( global_host );
global_host = NULL;
return 0;
}
int slap_sasl_open( Connection *conn )
{
int cb, sc = LDAP_SUCCESS;
#if SASL_VERSION_MAJOR >= 2
char *ipremoteport = NULL, *iplocalport = NULL;
#endif
#ifdef HAVE_CYRUS_SASL
sasl_conn_t *ctx = NULL;
sasl_callback_t *session_callbacks;
assert( conn->c_sasl_context == NULL );
assert( conn->c_sasl_extra == NULL );
conn->c_sasl_layers = 0;
session_callbacks =
#if SASL_VERSION_MAJOR >= 2
ch_calloc( 5, sizeof(sasl_callback_t));
#else
ch_calloc( 3, sizeof(sasl_callback_t));
#endif
conn->c_sasl_extra = session_callbacks;
session_callbacks[cb=0].id = SASL_CB_LOG;
session_callbacks[cb].proc = &slap_sasl_log;
session_callbacks[cb++].context = conn;
session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
session_callbacks[cb].proc = &slap_sasl_authorize;
session_callbacks[cb++].context = conn;
#if SASL_VERSION_MAJOR >= 2
#if 0 /* CANON isn't for what you think it does. */
session_callbacks[cb].id = SASL_CB_CANON_USER;
session_callbacks[cb].proc = &slap_sasl_canonicalize;
session_callbacks[cb++].context = conn;
#endif
/* XXXX: this should be conditional */
session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
session_callbacks[cb].proc = &slap_sasl_checkpass;
session_callbacks[cb++].context = conn;
#endif
session_callbacks[cb].id = SASL_CB_LIST_END;
session_callbacks[cb].proc = NULL;
session_callbacks[cb++].context = NULL;
if( global_host == NULL ) {
global_host = ldap_pvt_get_fqdn( NULL );
}
/* create new SASL context */
#if SASL_VERSION_MAJOR >= 2
if ( conn->c_sock_name.bv_len != 0 &&
strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
char *p;
iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
/* Convert IPv6 addresses to address;port syntax. */
p = strrchr( iplocalport, ' ' );
/* Convert IPv4 addresses to address;port syntax. */
if ( p == NULL ) p = strchr( iplocalport, ':' );
if ( p != NULL ) {
*p = ';';
}
}
if ( conn->c_peer_name.bv_len != 0 &&
strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
char *p;
ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
/* Convert IPv6 addresses to address;port syntax. */
p = strrchr( ipremoteport, ' ' );
/* Convert IPv4 addresses to address;port syntax. */
if ( p == NULL ) p = strchr( ipremoteport, ':' );
if ( p != NULL ) {
*p = ';';
}
}
sc = sasl_server_new( "ldap", global_host, global_realm,
iplocalport, ipremoteport, session_callbacks, 0, &ctx );
if ( iplocalport != NULL ) {
ch_free( iplocalport );
}
if ( ipremoteport != NULL ) {
ch_free( ipremoteport );
}
#else
sc = sasl_server_new( "ldap", global_host, global_realm,
session_callbacks, SASL_SECURITY_LAYER, &ctx );
#endif
if( sc != SASL_OK ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
"slap_sasl_open: sasl_server_new failed: %d\n", sc ));
#else
Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
sc, 0, 0 );
#endif
return -1;
}
conn->c_sasl_context = ctx;
if( sc == SASL_OK ) {
sc = sasl_setprop( ctx,
SASL_SEC_PROPS, &sasl_secprops );
if( sc != SASL_OK ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
"slap_sasl_open: sasl_setprop failed: %d \n", sc ));
#else
Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
sc, 0, 0 );
#endif
slap_sasl_close( conn );
return -1;
}
}
sc = slap_sasl_err2ldap( sc );
#endif
return sc;
}
int slap_sasl_external(
Connection *conn,
slap_ssf_t ssf,
const char *auth_id )
{
#if SASL_VERSION_MAJOR >= 2
int sc;
sasl_conn_t *ctx = conn->c_sasl_context;
if ( ctx == NULL ) {
return LDAP_UNAVAILABLE;
}
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
if ( sc != SASL_OK ) {
return LDAP_OTHER;
}
sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
if ( sc != SASL_OK ) {
return LDAP_OTHER;
}
#elif defined(HAVE_CYRUS_SASL)
int sc;
sasl_conn_t *ctx = conn->c_sasl_context;
sasl_external_properties_t extprops;
if ( ctx == NULL ) {
return LDAP_UNAVAILABLE;
}
memset( &extprops, '\0', sizeof(extprops) );
extprops.ssf = ssf;
extprops.auth_id = (char *) auth_id;
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
(void *) &extprops );
if ( sc != SASL_OK ) {
return LDAP_OTHER;
}
#endif
return LDAP_SUCCESS;
}
int slap_sasl_reset( Connection *conn )
{
#ifdef HAVE_CYRUS_SASL
sasl_conn_t *ctx = conn->c_sasl_context;
if( ctx != NULL ) {
}
#endif
/* must return "anonymous" */
return LDAP_SUCCESS;
}
char ** slap_sasl_mechs( Connection *conn )
{
char **mechs = NULL;
#ifdef HAVE_CYRUS_SASL
sasl_conn_t *ctx = conn->c_sasl_context;
if( ctx != NULL ) {
int sc;
SASL_CONST char *mechstr;
sc = sasl_listmech( ctx,
NULL, NULL, ",", NULL,
&mechstr, NULL, NULL );
if( sc != SASL_OK ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
"slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
#else
Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
sc, 0, 0 );
#endif
return NULL;
}
mechs = str2charray( mechstr, "," );
#if SASL_VERSION_MAJOR < 2
ch_free( mechstr );
#endif
}
#endif
return mechs;
}
int slap_sasl_close( Connection *conn )
{
#ifdef HAVE_CYRUS_SASL
sasl_conn_t *ctx = conn->c_sasl_context;
if( ctx != NULL ) {
sasl_dispose( &ctx );
}
conn->c_sasl_context = NULL;
free( conn->c_sasl_extra );
conn->c_sasl_extra = NULL;
#endif
return LDAP_SUCCESS;
}
int slap_sasl_bind(
Connection *conn,
Operation *op,
struct berval *dn,
struct berval *ndn,
struct berval *cred,
struct berval *edn,
slap_ssf_t *ssfp )
{
int rc = 1;
#ifdef HAVE_CYRUS_SASL
sasl_conn_t *ctx = conn->c_sasl_context;
struct berval response;
unsigned reslen = 0;
const char *errstr = NULL;
int sc;
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
conn->c_connid,
dn->bv_len ? dn->bv_val : "",
conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech.bv_val,
cred ? cred->bv_len : 0 ));
#else
Debug(LDAP_DEBUG_ARGS,
"==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
dn->bv_len ? dn->bv_val : "",
conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
cred ? cred->bv_len : 0 );
#endif
if( ctx == NULL ) {
send_ldap_result( conn, op, LDAP_UNAVAILABLE,
NULL, "SASL unavailable on this session", NULL, NULL );
return rc;
}
#if SASL_VERSION_MAJOR >= 2
#define START( ctx, mech, cred, clen, resp, rlen, err ) \
sasl_server_start( ctx, mech, cred, clen, resp, rlen )
#define STEP( ctx, cred, clen, resp, rlen, err ) \
sasl_server_step( ctx, cred, clen, resp, rlen )
#else
#define START( ctx, mech, cred, clen, resp, rlen, err ) \
sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
#define STEP( ctx, cred, clen, resp, rlen, err ) \
sasl_server_step( ctx, cred, clen, resp, rlen, err )
#endif
if ( !conn->c_sasl_bind_in_progress ) {
sc = START( ctx,
conn->c_sasl_bind_mech.bv_val,
cred->bv_len ? cred->bv_val : "",
cred->bv_len,
(SASL_CONST char **)&response.bv_val, &reslen, &errstr );
} else {
sc = STEP( ctx,
cred->bv_val, cred->bv_len,
(SASL_CONST char **)&response.bv_val, &reslen, &errstr );
}
response.bv_len = reslen;
if ( sc == SASL_OK ) {
char *username = NULL;
sc = sasl_getprop( ctx,
SASL_USERNAME, (SASL_CONST void **)&username );
if ( sc != SASL_OK ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
"slap_sasl_bind: getprop(USERNAME) failed: %d\n", sc ));
#else
Debug(LDAP_DEBUG_TRACE,
"slap_sasl_bind: getprop(USERNAME) failed!\n",
0, 0, 0);
#endif
send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
NULL, "no SASL username", NULL, NULL );
} else {
sasl_ssf_t *ssf = NULL;
rc = LDAP_SUCCESS;
ber_str2bv( username, 0, 1, edn );
(void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
*ssfp = ssf ? *ssf : 0;
if( *ssfp ) {
ldap_pvt_thread_mutex_lock( &conn->c_mutex );
conn->c_sasl_layers++;
ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
}
send_ldap_sasl( conn, op, rc,
NULL, NULL, NULL, NULL,
response.bv_len ? &response : NULL );
}
} else if ( sc == SASL_CONTINUE ) {
send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
NULL, NULL, NULL, NULL, &response );
} else {
#if SASL_VERSION_MAJOR >= 2
errstr = sasl_errdetail( ctx );
#endif
send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
NULL, errstr, NULL, NULL );
}
#if SASL_VERSION_MAJOR < 2
if( response.bv_len ) {
ch_free( response.bv_val );
}
#endif
#ifdef NEW_LOGGING
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
"slap_sasl_bind: rc=%d\n", rc ));
#else
Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
#endif
#else
send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
NULL, "SASL not supported", NULL, NULL );
#endif
return rc;
}
char* slap_sasl_secprops( const char *in )
{
#ifdef HAVE_CYRUS_SASL
int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
#else
return "SASL not supported";
#endif
}
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