mirror/openldap
2
0
Fork 0
mirror of https://git.openldap.org/openldap/openldap.git synced 2024-12-21 03:10:25 +08:00
Code Issues Packages Projects Releases Wiki Activity
1df85d3427
openldap/servers/slapd/overlays/ppolicy.c
Quanah Gibson-Mount 1df85d3427 Happy New Year!
2017-01-03 12:36:47 -08:00

2530 lines
70 KiB
C
Raw Blame History

/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2004-2017 The OpenLDAP Foundation.
* Portions Copyright 2004-2005 Howard Chu, Symas Corporation.
* Portions Copyright 2004 Hewlett-Packard Company.
* 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>.
*/
/* ACKNOWLEDGEMENTS:
* This work was developed by Howard Chu for inclusion in
* OpenLDAP Software, based on prior work by Neil Dunbar (HP).
* This work was sponsored by the Hewlett-Packard Company.
*/
#include "portable.h"
/* This file implements "Password Policy for LDAP Directories",
* based on draft behera-ldap-password-policy-09
*/
#ifdef SLAPD_OVER_PPOLICY
#include <ldap.h>
#include "lutil.h"
#include "slap.h"
#ifdef SLAPD_MODULES
#define LIBLTDL_DLL_IMPORT /* Win32: don't re-export libltdl's symbols */
#include <ltdl.h>
#endif
#include <ac/errno.h>
#include <ac/time.h>
#include <ac/string.h>
#include <ac/ctype.h>
#include "config.h"
#ifndef MODULE_NAME_SZ
#define MODULE_NAME_SZ 256
#endif
#ifndef PPOLICY_DEFAULT_MAXRECORDED_FAILURE
#define PPOLICY_DEFAULT_MAXRECORDED_FAILURE 5
#endif
/* Per-instance configuration information */
typedef struct pp_info {
struct berval def_policy; /* DN of default policy subentry */
int use_lockout; /* send AccountLocked result? */
int hash_passwords; /* transparently hash cleartext pwds */
int forward_updates; /* use frontend for policy state updates */
} pp_info;
/* Our per-connection info - note, it is not per-instance, it is
* used by all instances
*/
typedef struct pw_conn {
struct berval dn; /* DN of restricted user */
} pw_conn;
static pw_conn *pwcons;
static int ppolicy_cid;
static int ov_count;
typedef struct pass_policy {
AttributeDescription *ad; /* attribute to which the policy applies */
int pwdMinAge; /* minimum time (seconds) until passwd can change */
int pwdMaxAge; /* time in seconds until pwd will expire after change */
int pwdInHistory; /* number of previous passwords kept */
int pwdCheckQuality; /* 0 = don't check quality, 1 = check if possible,
2 = check mandatory; fail if not possible */
int pwdMinLength; /* minimum number of chars in password */
int pwdExpireWarning; /* number of seconds that warning controls are
sent before a password expires */
int pwdGraceAuthNLimit; /* number of times you can log in with an
expired password */
int pwdLockout; /* 0 = do not lockout passwords, 1 = lock them out */
int pwdLockoutDuration; /* time in seconds a password is locked out for */
int pwdMaxFailure; /* number of failed binds allowed before lockout */
int pwdMaxRecordedFailure; /* number of failed binds to store */
int pwdFailureCountInterval; /* number of seconds before failure
counts are zeroed */
int pwdMustChange; /* 0 = users can use admin set password
1 = users must change password after admin set */
int pwdAllowUserChange; /* 0 = users cannot change their passwords
1 = users can change them */
int pwdSafeModify; /* 0 = old password doesn't need to come
with password change request
1 = password change must supply existing pwd */
char pwdCheckModule[MODULE_NAME_SZ]; /* name of module to dynamically
load to check password */
} PassPolicy;
typedef struct pw_hist {
time_t t; /* timestamp of history entry */
struct berval pw; /* old password hash */
struct berval bv; /* text of entire entry */
struct pw_hist *next;
} pw_hist;
/* Operational attributes */
static AttributeDescription *ad_pwdChangedTime, *ad_pwdAccountLockedTime,
*ad_pwdFailureTime, *ad_pwdHistory, *ad_pwdGraceUseTime, *ad_pwdReset,
*ad_pwdPolicySubentry;
static struct schema_info {
char *def;
AttributeDescription **ad;
} pwd_OpSchema[] = {
{ "( 1.3.6.1.4.1.42.2.27.8.1.16 "
"NAME ( 'pwdChangedTime' ) "
"DESC 'The time the password was last changed' "
"EQUALITY generalizedTimeMatch "
"ORDERING generalizedTimeOrderingMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
"SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )",
&ad_pwdChangedTime },
{ "( 1.3.6.1.4.1.42.2.27.8.1.17 "
"NAME ( 'pwdAccountLockedTime' ) "
"DESC 'The time an user account was locked' "
"EQUALITY generalizedTimeMatch "
"ORDERING generalizedTimeOrderingMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
"SINGLE-VALUE "
#if 0
/* Not until Relax control is released */
"NO-USER-MODIFICATION "
#endif
"USAGE directoryOperation )",
&ad_pwdAccountLockedTime },
{ "( 1.3.6.1.4.1.42.2.27.8.1.19 "
"NAME ( 'pwdFailureTime' ) "
"DESC 'The timestamps of the last consecutive authentication failures' "
"EQUALITY generalizedTimeMatch "
"ORDERING generalizedTimeOrderingMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
"NO-USER-MODIFICATION USAGE directoryOperation )",
&ad_pwdFailureTime },
{ "( 1.3.6.1.4.1.42.2.27.8.1.20 "
"NAME ( 'pwdHistory' ) "
"DESC 'The history of users passwords' "
"EQUALITY octetStringMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 "
"NO-USER-MODIFICATION USAGE directoryOperation )",
&ad_pwdHistory },
{ "( 1.3.6.1.4.1.42.2.27.8.1.21 "
"NAME ( 'pwdGraceUseTime' ) "
"DESC 'The timestamps of the grace login once the password has expired' "
"EQUALITY generalizedTimeMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
"NO-USER-MODIFICATION USAGE directoryOperation )",
&ad_pwdGraceUseTime },
{ "( 1.3.6.1.4.1.42.2.27.8.1.22 "
"NAME ( 'pwdReset' ) "
"DESC 'The indication that the password has been reset' "
"EQUALITY booleanMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
"SINGLE-VALUE USAGE directoryOperation )",
&ad_pwdReset },
{ "( 1.3.6.1.4.1.42.2.27.8.1.23 "
"NAME ( 'pwdPolicySubentry' ) "
"DESC 'The pwdPolicy subentry in effect for this object' "
"EQUALITY distinguishedNameMatch "
"SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 "
"SINGLE-VALUE "
#if 0
/* Not until Relax control is released */
"NO-USER-MODIFICATION "
#endif
"USAGE directoryOperation )",
&ad_pwdPolicySubentry },
{ NULL, NULL }
};
/* User attributes */
static AttributeDescription *ad_pwdMinAge, *ad_pwdMaxAge, *ad_pwdInHistory,
*ad_pwdCheckQuality, *ad_pwdMinLength, *ad_pwdMaxFailure,
*ad_pwdGraceAuthNLimit, *ad_pwdExpireWarning, *ad_pwdLockoutDuration,
*ad_pwdFailureCountInterval, *ad_pwdCheckModule, *ad_pwdLockout,
*ad_pwdMustChange, *ad_pwdAllowUserChange, *ad_pwdSafeModify,
*ad_pwdAttribute, *ad_pwdMaxRecordedFailure;
#define TAB(name) { #name, &ad_##name }
static struct schema_info pwd_UsSchema[] = {
TAB(pwdAttribute),
TAB(pwdMinAge),
TAB(pwdMaxAge),
TAB(pwdInHistory),
TAB(pwdCheckQuality),
TAB(pwdMinLength),
TAB(pwdMaxFailure),
TAB(pwdMaxRecordedFailure),
TAB(pwdGraceAuthNLimit),
TAB(pwdExpireWarning),
TAB(pwdLockout),
TAB(pwdLockoutDuration),
TAB(pwdFailureCountInterval),
TAB(pwdCheckModule),
TAB(pwdMustChange),
TAB(pwdAllowUserChange),
TAB(pwdSafeModify),
{ NULL, NULL }
};
static ldap_pvt_thread_mutex_t chk_syntax_mutex;
enum {
PPOLICY_DEFAULT = 1,
PPOLICY_HASH_CLEARTEXT,
PPOLICY_USE_LOCKOUT
};
static ConfigDriver ppolicy_cf_default;
static ConfigTable ppolicycfg[] = {
{ "ppolicy_default", "policyDN", 2, 2, 0,
ARG_DN|ARG_QUOTE|ARG_MAGIC|PPOLICY_DEFAULT, ppolicy_cf_default,
"( OLcfgOvAt:12.1 NAME 'olcPPolicyDefault' "
"DESC 'DN of a pwdPolicy object for uncustomized objects' "
"SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
{ "ppolicy_hash_cleartext", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET|PPOLICY_HASH_CLEARTEXT,
(void *)offsetof(pp_info,hash_passwords),
"( OLcfgOvAt:12.2 NAME 'olcPPolicyHashCleartext' "
"DESC 'Hash passwords on add or modify' "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "ppolicy_forward_updates", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET,
(void *)offsetof(pp_info,forward_updates),
"( OLcfgOvAt:12.4 NAME 'olcPPolicyForwardUpdates' "
"DESC 'Allow policy state updates to be forwarded via updateref' "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "ppolicy_use_lockout", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET|PPOLICY_USE_LOCKOUT,
(void *)offsetof(pp_info,use_lockout),
"( OLcfgOvAt:12.3 NAME 'olcPPolicyUseLockout' "
"DESC 'Warn clients with AccountLocked' "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
};
static ConfigOCs ppolicyocs[] = {
{ "( OLcfgOvOc:12.1 "
"NAME 'olcPPolicyConfig' "
"DESC 'Password Policy configuration' "
"SUP olcOverlayConfig "
"MAY ( olcPPolicyDefault $ olcPPolicyHashCleartext $ "
"olcPPolicyUseLockout $ olcPPolicyForwardUpdates ) )",
Cft_Overlay, ppolicycfg },
{ NULL, 0, NULL }
};
static int
ppolicy_cf_default( ConfigArgs *c )
{
slap_overinst *on = (slap_overinst *)c->bi;
pp_info *pi = (pp_info *)on->on_bi.bi_private;
int rc = ARG_BAD_CONF;
assert ( c->type == PPOLICY_DEFAULT );
Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default\n", 0, 0, 0);
switch ( c->op ) {
case SLAP_CONFIG_EMIT:
Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default emit\n", 0, 0, 0);
rc = 0;
if ( !BER_BVISEMPTY( &pi->def_policy )) {
rc = value_add_one( &c->rvalue_vals,
&pi->def_policy );
if ( rc ) return rc;
rc = value_add_one( &c->rvalue_nvals,
&pi->def_policy );
}
break;
case LDAP_MOD_DELETE:
Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default delete\n", 0, 0, 0);
if ( pi->def_policy.bv_val ) {
ber_memfree ( pi->def_policy.bv_val );
pi->def_policy.bv_val = NULL;
}
pi->def_policy.bv_len = 0;
rc = 0;
break;
case SLAP_CONFIG_ADD:
/* fallthrough to LDAP_MOD_ADD */
case LDAP_MOD_ADD:
Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default add\n", 0, 0, 0);
if ( pi->def_policy.bv_val ) {
ber_memfree ( pi->def_policy.bv_val );
}
pi->def_policy = c->value_ndn;
ber_memfree( c->value_dn.bv_val );
BER_BVZERO( &c->value_dn );
BER_BVZERO( &c->value_ndn );
rc = 0;
break;
default:
abort ();
}
return rc;
}
static time_t
parse_time( char *atm )
{
struct lutil_tm tm;
struct lutil_timet tt;
time_t ret = (time_t)-1;
if ( lutil_parsetime( atm, &tm ) == 0) {
lutil_tm2time( &tm, &tt );
ret = tt.tt_sec;
}
return ret;
}
static int
account_locked( Operation *op, Entry *e,
PassPolicy *pp, Modifications **mod )
{
Attribute *la;
assert(mod != NULL);
if ( !pp->pwdLockout )
return 0;
if ( (la = attr_find( e->e_attrs, ad_pwdAccountLockedTime )) != NULL ) {
BerVarray vals = la->a_nvals;
/*
* there is a lockout stamp - we now need to know if it's
* a valid one.
*/
if (vals[0].bv_val != NULL) {
time_t then, now;
Modifications *m;
if ((then = parse_time( vals[0].bv_val )) == (time_t)0)
return 1;
now = slap_get_time();
/* Still in the future? not yet in effect */
if (now < then)
return 0;
if (!pp->pwdLockoutDuration)
return 1;
if (now < then + pp->pwdLockoutDuration)
return 1;
m = ch_calloc( sizeof(Modifications), 1 );
m->sml_op = LDAP_MOD_DELETE;
m->sml_flags = 0;
m->sml_type = ad_pwdAccountLockedTime->ad_cname;
m->sml_desc = ad_pwdAccountLockedTime;
m->sml_next = *mod;
*mod = m;
}
}
return 0;
}
/* IMPLICIT TAGS, all context-specific */
#define PPOLICY_WARNING 0xa0L /* constructed + 0 */
#define PPOLICY_ERROR 0x81L /* primitive + 1 */
#define PPOLICY_EXPIRE 0x80L /* primitive + 0 */
#define PPOLICY_GRACE 0x81L /* primitive + 1 */
static const char ppolicy_ctrl_oid[] = LDAP_CONTROL_PASSWORDPOLICYRESPONSE;
static LDAPControl *
create_passcontrol( Operation *op, int exptime, int grace, LDAPPasswordPolicyError err )
{
BerElementBuffer berbuf, bb2;
BerElement *ber = (BerElement *) &berbuf, *b2 = (BerElement *) &bb2;
LDAPControl c = { 0 }, *cp;
struct berval bv;
int rc;
BER_BVZERO( &c.ldctl_value );
ber_init2( ber, NULL, LBER_USE_DER );
ber_printf( ber, "{" /*}*/ );
if ( exptime >= 0 ) {
ber_init2( b2, NULL, LBER_USE_DER );
ber_printf( b2, "ti", PPOLICY_EXPIRE, exptime );
rc = ber_flatten2( b2, &bv, 1 );
(void)ber_free_buf(b2);
if (rc == -1) {
cp = NULL;
goto fail;
}
ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
ch_free( bv.bv_val );
} else if ( grace > 0 ) {
ber_init2( b2, NULL, LBER_USE_DER );
ber_printf( b2, "ti", PPOLICY_GRACE, grace );
rc = ber_flatten2( b2, &bv, 1 );
(void)ber_free_buf(b2);
if (rc == -1) {
cp = NULL;
goto fail;
}
ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
ch_free( bv.bv_val );
}
if (err != PP_noError ) {
ber_printf( ber, "te", PPOLICY_ERROR, err );
}
ber_printf( ber, /*{*/ "N}" );
if (ber_flatten2( ber, &c.ldctl_value, 0 ) == -1) {
return NULL;
}
cp = op->o_tmpalloc( sizeof( LDAPControl ) + c.ldctl_value.bv_len, op->o_tmpmemctx );
cp->ldctl_oid = (char *)ppolicy_ctrl_oid;
cp->ldctl_iscritical = 0;
cp->ldctl_value.bv_val = (char *)&cp[1];
cp->ldctl_value.bv_len = c.ldctl_value.bv_len;
AC_MEMCPY( cp->ldctl_value.bv_val, c.ldctl_value.bv_val, c.ldctl_value.bv_len );
fail:
(void)ber_free_buf(ber);
return cp;
}
static LDAPControl **
add_passcontrol( Operation *op, SlapReply *rs, LDAPControl *ctrl )
{
LDAPControl **ctrls, **oldctrls = rs->sr_ctrls;
int n;
n = 0;
if ( oldctrls ) {
for ( ; oldctrls[n]; n++ )
;
}
n += 2;
ctrls = op->o_tmpcalloc( sizeof( LDAPControl * ), n, op->o_tmpmemctx );
n = 0;
if ( oldctrls ) {
for ( ; oldctrls[n]; n++ ) {
ctrls[n] = oldctrls[n];
}
}
ctrls[n] = ctrl;
ctrls[n+1] = NULL;
rs->sr_ctrls = ctrls;
return oldctrls;
}
static void
ppolicy_get_default( PassPolicy *pp )
{
memset( pp, 0, sizeof(PassPolicy) );
pp->ad = slap_schema.si_ad_userPassword;
/* Users can change their own password by default */
pp->pwdAllowUserChange = 1;
if ( !pp->pwdMaxRecordedFailure )
pp->pwdMaxRecordedFailure = PPOLICY_DEFAULT_MAXRECORDED_FAILURE;
}
static void
ppolicy_get( Operation *op, Entry *e, PassPolicy *pp )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
pp_info *pi = on->on_bi.bi_private;
Attribute *a;
BerVarray vals;
int rc;
Entry *pe = NULL;
#if 0
const char *text;
#endif
ppolicy_get_default( pp );
if ((a = attr_find( e->e_attrs, ad_pwdPolicySubentry )) == NULL) {
/*
* entry has no password policy assigned - use default
*/
vals = &pi->def_policy;
if ( !vals->bv_val )
goto defaultpol;
} else {
vals = a->a_nvals;
if (vals[0].bv_val == NULL) {
Debug( LDAP_DEBUG_ANY,
"ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
goto defaultpol;
}
}
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, vals, NULL, NULL, 0, &pe );
op->o_bd->bd_info = (BackendInfo *)on;
if ( rc ) goto defaultpol;
#if 0 /* Only worry about userPassword for now */
if ((a = attr_find( pe->e_attrs, ad_pwdAttribute )))
slap_bv2ad( &a->a_vals[0], &pp->ad, &text );
#endif
if ( ( a = attr_find( pe->e_attrs, ad_pwdMinAge ) )
&& lutil_atoi( &pp->pwdMinAge, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxAge ) )
&& lutil_atoi( &pp->pwdMaxAge, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdInHistory ) )
&& lutil_atoi( &pp->pwdInHistory, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckQuality ) )
&& lutil_atoi( &pp->pwdCheckQuality, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdMinLength ) )
&& lutil_atoi( &pp->pwdMinLength, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxFailure ) )
&& lutil_atoi( &pp->pwdMaxFailure, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxRecordedFailure ) )
&& lutil_atoi( &pp->pwdMaxRecordedFailure, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdGraceAuthNLimit ) )
&& lutil_atoi( &pp->pwdGraceAuthNLimit, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdExpireWarning ) )
&& lutil_atoi( &pp->pwdExpireWarning, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdFailureCountInterval ) )
&& lutil_atoi( &pp->pwdFailureCountInterval, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdLockoutDuration ) )
&& lutil_atoi( &pp->pwdLockoutDuration, a->a_vals[0].bv_val ) != 0 )
goto defaultpol;
if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckModule ) ) ) {
strncpy( pp->pwdCheckModule, a->a_vals[0].bv_val,
sizeof(pp->pwdCheckModule) );
pp->pwdCheckModule[sizeof(pp->pwdCheckModule)-1] = '\0';
}
if ((a = attr_find( pe->e_attrs, ad_pwdLockout )))
pp->pwdLockout = bvmatch( &a->a_nvals[0], &slap_true_bv );
if ((a = attr_find( pe->e_attrs, ad_pwdMustChange )))
pp->pwdMustChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
if ((a = attr_find( pe->e_attrs, ad_pwdAllowUserChange )))
pp->pwdAllowUserChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
if ((a = attr_find( pe->e_attrs, ad_pwdSafeModify )))
pp->pwdSafeModify = bvmatch( &a->a_nvals[0], &slap_true_bv );
if ( pp->pwdMaxRecordedFailure < pp->pwdMaxFailure )
pp->pwdMaxRecordedFailure = pp->pwdMaxFailure;
if ( !pp->pwdMaxRecordedFailure )
pp->pwdMaxRecordedFailure = PPOLICY_DEFAULT_MAXRECORDED_FAILURE;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, pe );
op->o_bd->bd_info = (BackendInfo *)on;
return;
defaultpol:
if ( pe ) {
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, pe );
op->o_bd->bd_info = (BackendInfo *)on;
}
Debug( LDAP_DEBUG_TRACE,
"ppolicy_get: using default policy\n", 0, 0, 0 );
ppolicy_get_default( pp );
return;
}
static int
password_scheme( struct berval *cred, struct berval *sch )
{
int e;
assert( cred != NULL );
if (sch) {
sch->bv_val = NULL;
sch->bv_len = 0;
}
if ((cred->bv_len == 0) || (cred->bv_val == NULL) ||
(cred->bv_val[0] != '{')) return LDAP_OTHER;
for(e = 1; cred->bv_val[e] && cred->bv_val[e] != '}'; e++);
if (cred->bv_val[e]) {
int rc;
rc = lutil_passwd_scheme( cred->bv_val );
if (rc) {
if (sch) {
sch->bv_val = cred->bv_val;
sch->bv_len = e;
}
return LDAP_SUCCESS;
}
}
return LDAP_OTHER;
}
static int
check_password_quality( struct berval *cred, PassPolicy *pp, LDAPPasswordPolicyError *err, Entry *e, char **txt )
{
int rc = LDAP_SUCCESS, ok = LDAP_SUCCESS;
char *ptr;
struct berval sch;
assert( cred != NULL );
assert( pp != NULL );
assert( txt != NULL );
ptr = cred->bv_val;
*txt = NULL;
if ((cred->bv_len == 0) || (pp->pwdMinLength > cred->bv_len)) {
rc = LDAP_CONSTRAINT_VIOLATION;
if ( err ) *err = PP_passwordTooShort;
return rc;
}
/*
* We need to know if the password is already hashed - if so
* what scheme is it. The reason being that the "hash" of
* {cleartext} still allows us to check the password.
*/
rc = password_scheme( cred, &sch );
if (rc == LDAP_SUCCESS) {
if ((sch.bv_val) && (strncasecmp( sch.bv_val, "{cleartext}",
sch.bv_len ) == 0)) {
/*
* We can check the cleartext "hash"
*/
ptr = cred->bv_val + sch.bv_len;
} else {
/* everything else, we can't check */
if (pp->pwdCheckQuality == 2) {
rc = LDAP_CONSTRAINT_VIOLATION;
if (err) *err = PP_insufficientPasswordQuality;
return rc;
}
/*
* We can't check the syntax of the password, but it's not
* mandatory (according to the policy), so we return success.
*/
return LDAP_SUCCESS;
}
}
rc = LDAP_SUCCESS;
if (pp->pwdCheckModule[0]) {
#ifdef SLAPD_MODULES
lt_dlhandle mod;
const char *err;
if ((mod = lt_dlopen( pp->pwdCheckModule )) == NULL) {
err = lt_dlerror();
Debug(LDAP_DEBUG_ANY,
"check_password_quality: lt_dlopen failed: (%s) %s.\n",
pp->pwdCheckModule, err, 0 );
ok = LDAP_OTHER; /* internal error */
} else {
/* FIXME: the error message ought to be passed thru a
* struct berval, with preallocated buffer and size
* passed in. Module can still allocate a buffer for
* it if the provided one is too small.
*/
int (*prog)( char *passwd, char **text, Entry *ent );
if ((prog = lt_dlsym( mod, "check_password" )) == NULL) {
err = lt_dlerror();
Debug(LDAP_DEBUG_ANY,
"check_password_quality: lt_dlsym failed: (%s) %s.\n",
pp->pwdCheckModule, err, 0 );
ok = LDAP_OTHER;
} else {
ldap_pvt_thread_mutex_lock( &chk_syntax_mutex );
ok = prog( ptr, txt, e );
ldap_pvt_thread_mutex_unlock( &chk_syntax_mutex );
if (ok != LDAP_SUCCESS) {
Debug(LDAP_DEBUG_ANY,
"check_password_quality: module error: (%s) %s.[%d]\n",
pp->pwdCheckModule, *txt ? *txt : "", ok );
}
}
lt_dlclose( mod );
}
#else
Debug(LDAP_DEBUG_ANY, "check_password_quality: external modules not "
"supported. pwdCheckModule ignored.\n", 0, 0, 0);
#endif /* SLAPD_MODULES */
}
if (ok != LDAP_SUCCESS) {
rc = LDAP_CONSTRAINT_VIOLATION;
if (err) *err = PP_insufficientPasswordQuality;
}
return rc;
}
static int
parse_pwdhistory( struct berval *bv, char **oid, time_t *oldtime, struct berval *oldpw )
{
char *ptr;
struct berval nv, npw;
ber_len_t i, j;
assert (bv && (bv->bv_len > 0) && (bv->bv_val) && oldtime && oldpw );
if ( oid ) {
*oid = 0;
}
*oldtime = (time_t)-1;
BER_BVZERO( oldpw );
ber_dupbv( &nv, bv );
/* first get the time field */
for ( i = 0; (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
;
if ( i == nv.bv_len ) {
goto exit_failure; /* couldn't locate the '#' separator */
}
nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
ptr = nv.bv_val;
*oldtime = parse_time( ptr );
if (*oldtime == (time_t)-1) {
goto exit_failure;
}
/* get the OID field */
for (ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
;
if ( i == nv.bv_len ) {
goto exit_failure; /* couldn't locate the '#' separator */
}
nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
if ( oid ) {
*oid = ber_strdup( ptr );
}
/* get the length field */
for ( ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
;
if ( i == nv.bv_len ) {
goto exit_failure; /* couldn't locate the '#' separator */
}
nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
oldpw->bv_len = strtol( ptr, NULL, 10 );
if (errno == ERANGE) {
goto exit_failure;
}
/* lastly, get the octets of the string */
for ( j = i, ptr = &(nv.bv_val[i]); i < nv.bv_len; i++ )
;
if ( i - j != oldpw->bv_len) {
goto exit_failure; /* length is wrong */
}
npw.bv_val = ptr;
npw.bv_len = oldpw->bv_len;
ber_dupbv( oldpw, &npw );
ber_memfree( nv.bv_val );
return LDAP_SUCCESS;
exit_failure:;
if ( oid && *oid ) {
ber_memfree(*oid);
*oid = NULL;
}
if ( oldpw->bv_val ) {
ber_memfree( oldpw->bv_val);
BER_BVZERO( oldpw );
}
ber_memfree( nv.bv_val );
return LDAP_OTHER;
}
static void
add_to_pwd_history( pw_hist **l, time_t t,
struct berval *oldpw, struct berval *bv )
{
pw_hist *p, *p1, *p2;
if (!l) return;
p = ch_malloc( sizeof( pw_hist ));
p->pw = *oldpw;
ber_dupbv( &p->bv, bv );
p->t = t;
p->next = NULL;
if (*l == NULL) {
/* degenerate case */
*l = p;
return;
}
/*
* advance p1 and p2 such that p1 is the node before the
* new one, and p2 is the node after it
*/
for (p1 = NULL, p2 = *l; p2 && p2->t <= t; p1 = p2, p2=p2->next );
p->next = p2;
if (p1 == NULL) { *l = p; return; }
p1->next = p;
}
#ifndef MAX_PWD_HISTORY_SZ
#define MAX_PWD_HISTORY_SZ 1024
#endif /* MAX_PWD_HISTORY_SZ */
static void
make_pwd_history_value( char *timebuf, struct berval *bv, Attribute *pa )
{
char str[ MAX_PWD_HISTORY_SZ ];
int nlen;
snprintf( str, MAX_PWD_HISTORY_SZ,
"%s#%s#%lu#", timebuf,
pa->a_desc->ad_type->sat_syntax->ssyn_oid,
(unsigned long) pa->a_nvals[0].bv_len );
str[MAX_PWD_HISTORY_SZ-1] = 0;
nlen = strlen(str);
/*
* We have to assume that the string is a string of octets,
* not readable characters. In reality, yes, it probably is
* a readable (ie, base64) string, but we can't count on that
* Hence, while the first 3 fields of the password history
* are definitely readable (a timestamp, an OID and an integer
* length), the remaining octets of the actual password
* are deemed to be binary data.
*/
AC_MEMCPY( str + nlen, pa->a_nvals[0].bv_val, pa->a_nvals[0].bv_len );
nlen += pa->a_nvals[0].bv_len;
bv->bv_val = ch_malloc( nlen + 1 );
AC_MEMCPY( bv->bv_val, str, nlen );
bv->bv_val[nlen] = '\0';
bv->bv_len = nlen;
}
static void
free_pwd_history_list( pw_hist **l )
{
pw_hist *p;
if (!l) return;
p = *l;
while (p) {
pw_hist *pp = p->next;
free(p->pw.bv_val);
free(p->bv.bv_val);
free(p);
p = pp;
}
*l = NULL;
}
typedef struct ppbind {
slap_overinst *on;
int send_ctrl;
int set_restrict;
LDAPControl **oldctrls;
Modifications *mod;
LDAPPasswordPolicyError pErr;
PassPolicy pp;
} ppbind;
static void
ctrls_cleanup( Operation *op, SlapReply *rs, LDAPControl **oldctrls )
{
int n;
assert( rs->sr_ctrls != NULL );
assert( rs->sr_ctrls[0] != NULL );
for ( n = 0; rs->sr_ctrls[n]; n++ ) {
if ( rs->sr_ctrls[n]->ldctl_oid == ppolicy_ctrl_oid ) {
op->o_tmpfree( rs->sr_ctrls[n], op->o_tmpmemctx );
rs->sr_ctrls[n] = (LDAPControl *)(-1);
break;
}
}
if ( rs->sr_ctrls[n] == NULL ) {
/* missed? */
}
op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
rs->sr_ctrls = oldctrls;
}
static int
ppolicy_ctrls_cleanup( Operation *op, SlapReply *rs )
{
ppbind *ppb = op->o_callback->sc_private;
if ( ppb->send_ctrl ) {
ctrls_cleanup( op, rs, ppb->oldctrls );
}
return SLAP_CB_CONTINUE;
}
static int
ppolicy_bind_response( Operation *op, SlapReply *rs )
{
ppbind *ppb = op->o_callback->sc_private;
slap_overinst *on = ppb->on;
Modifications *mod = ppb->mod, *m;
int pwExpired = 0;
int ngut = -1, warn = -1, age, rc;
Attribute *a;
time_t now, pwtime = (time_t)-1;
struct lutil_tm now_tm;
struct lutil_timet now_usec;
char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
char nowstr_usec[ LDAP_LUTIL_GENTIME_BUFSIZE+8 ];
struct berval timestamp, timestamp_usec;
BackendInfo *bi = op->o_bd->bd_info;
Entry *e;
/* If we already know it's locked, just get on with it */
if ( ppb->pErr != PP_noError ) {
goto locked;
}
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
op->o_bd->bd_info = bi;
if ( rc != LDAP_SUCCESS ) {
return SLAP_CB_CONTINUE;
}
ldap_pvt_gettime(&now_tm); /* stored for later consideration */
lutil_tm2time(&now_tm, &now_usec);
now = now_usec.tt_sec;
timestamp.bv_val = nowstr;
timestamp.bv_len = sizeof(nowstr);
slap_timestamp( &now, &timestamp );
/* Separate timestamp for pwdFailureTime with microsecond granularity */
strcpy(nowstr_usec, nowstr);
timestamp_usec.bv_val = nowstr_usec;
timestamp_usec.bv_len = timestamp.bv_len;
snprintf( timestamp_usec.bv_val + timestamp_usec.bv_len-1, sizeof(".123456Z"), ".%06dZ", now_usec.tt_usec );
timestamp_usec.bv_len += STRLENOF(".123456");
if ( rs->sr_err == LDAP_INVALID_CREDENTIALS ) {
int i = 0, fc = 0;
m = ch_calloc( sizeof(Modifications), 1 );
m->sml_op = LDAP_MOD_ADD;
m->sml_flags = 0;
m->sml_type = ad_pwdFailureTime->ad_cname;
m->sml_desc = ad_pwdFailureTime;
m->sml_numvals = 1;
m->sml_values = ch_calloc( sizeof(struct berval), 2 );
m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
ber_dupbv( &m->sml_values[0], &timestamp_usec );
ber_dupbv( &m->sml_nvalues[0], &timestamp_usec );
m->sml_next = mod;
mod = m;
/*
* Count the pwdFailureTimes - if it's
* greater than the policy pwdMaxFailure,
* then lock the account.
*/
if ((a = attr_find( e->e_attrs, ad_pwdFailureTime )) != NULL) {
for(i=0; a->a_nvals[i].bv_val; i++) {
/*
* If the interval is 0, then failures
* stay on the record until explicitly
* reset by successful authentication.
*/
if (ppb->pp.pwdFailureCountInterval == 0) {
fc++;
} else if (now <=
parse_time(a->a_nvals[i].bv_val) +
ppb->pp.pwdFailureCountInterval) {
fc++;
}
/*
* We only count those failures
* which are not due to expire.
*/
}
/* Do we have too many timestamps? If so, delete some values.
* We don't bother to sort the values here. OpenLDAP keeps the
* values in order by default. Fundamentally, relying on the
* information here is wrong anyway; monitoring systems should
* be tracking Bind failures in syslog, not here.
*/
if (a->a_numvals >= ppb->pp.pwdMaxRecordedFailure) {
int j = ppb->pp.pwdMaxRecordedFailure-1;
/* If more than 2x, cheaper to perform a Replace */
if (a->a_numvals >= 2 * ppb->pp.pwdMaxRecordedFailure) {
struct berval v, nv;
/* Change the mod we constructed above */
m->sml_op = LDAP_MOD_REPLACE;
m->sml_numvals = ppb->pp.pwdMaxRecordedFailure;
v = m->sml_values[0];
nv = m->sml_nvalues[0];
ch_free(m->sml_values);
ch_free(m->sml_nvalues);
m->sml_values = ch_calloc( sizeof(struct berval), ppb->pp.pwdMaxRecordedFailure+1 );
m->sml_nvalues = ch_calloc( sizeof(struct berval), ppb->pp.pwdMaxRecordedFailure+1 );
for (i=0; i<j; i++) {
ber_dupbv(&m->sml_values[i], &a->a_vals[a->a_numvals-j+i]);
ber_dupbv(&m->sml_nvalues[i], &a->a_nvals[a->a_numvals-j+i]);
}
m->sml_values[i] = v;
m->sml_nvalues[i] = nv;
} else {
/* else just delete some */
m = ch_calloc( sizeof(Modifications), 1 );
m->sml_op = LDAP_MOD_DELETE;
m->sml_type = ad_pwdFailureTime->ad_cname;
m->sml_desc = ad_pwdFailureTime;
m->sml_numvals = a->a_numvals - j;
m->sml_values = ch_calloc( sizeof(struct berval), m->sml_numvals+1 );
m->sml_nvalues = ch_calloc( sizeof(struct berval), m->sml_numvals+1 );
for (i=0; i<m->sml_numvals; i++) {
ber_dupbv(&m->sml_values[i], &a->a_vals[i]);
ber_dupbv(&m->sml_nvalues[i], &a->a_nvals[i]);
}
m->sml_next = mod;
mod = m;
}
}
}
if ((ppb->pp.pwdMaxFailure > 0) &&
(fc >= ppb->pp.pwdMaxFailure - 1)) {
/*
* We subtract 1 from the failure max
* because the new failure entry hasn't
* made it to the entry yet.
*/
m = ch_calloc( sizeof(Modifications), 1 );
m->sml_op = LDAP_MOD_REPLACE;
m->sml_flags = 0;
m->sml_type = ad_pwdAccountLockedTime->ad_cname;
m->sml_desc = ad_pwdAccountLockedTime;
m->sml_numvals = 1;
m->sml_values = ch_calloc( sizeof(struct berval), 2 );
m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
ber_dupbv( &m->sml_values[0], &timestamp );
ber_dupbv( &m->sml_nvalues[0], &timestamp );
m->sml_next = mod;
mod = m;
}
} else if ( rs->sr_err == LDAP_SUCCESS ) {
if ((a = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
pwtime = parse_time( a->a_nvals[0].bv_val );
/* delete all pwdFailureTimes */
if ( attr_find( e->e_attrs, ad_pwdFailureTime )) {
m = ch_calloc( sizeof(Modifications), 1 );
m->sml_op = LDAP_MOD_DELETE;
m->sml_flags = 0;
m->sml_type = ad_pwdFailureTime->ad_cname;
m->sml_desc = ad_pwdFailureTime;
m->sml_next = mod;
mod = m;
}
/*
* check to see if the password must be changed
*/
if ( ppb->pp.pwdMustChange &&
(a = attr_find( e->e_attrs, ad_pwdReset )) &&
bvmatch( &a->a_nvals[0], &slap_true_bv ) )
{
/*
* need to inject client controls here to give
* more information. For the moment, we ensure
* that we are disallowed from doing anything
* other than change password.
*/
if ( ppb->set_restrict ) {
ber_dupbv( &pwcons[op->o_conn->c_conn_idx].dn,
&op->o_conn->c_ndn );
}
ppb->pErr = PP_changeAfterReset;
} else {
/*
* the password does not need to be changed, so
* we now check whether the password has expired.
*
* We can skip this bit if passwords don't age in
* the policy. Also, if there was no pwdChangedTime
* attribute in the entry, the password never expires.
*/
if (ppb->pp.pwdMaxAge == 0) goto grace;
if (pwtime != (time_t)-1) {
/*
* Check: was the last change time of
* the password older than the maximum age
* allowed. (Ignore case 2 from I-D, it's just silly.)
*/
if (now - pwtime > ppb->pp.pwdMaxAge ) pwExpired = 1;
}
}
grace:
if (!pwExpired) goto check_expiring_password;
if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
ngut = ppb->pp.pwdGraceAuthNLimit;
else {
for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
ngut = ppb->pp.pwdGraceAuthNLimit - ngut;
}
/*
* ngut is the number of remaining grace logins
*/
Debug( LDAP_DEBUG_ANY,
"ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
e->e_name.bv_val, ngut, 0);
if (ngut < 1) {
ppb->pErr = PP_passwordExpired;
rs->sr_err = LDAP_INVALID_CREDENTIALS;
goto done;
}
/*
* Add a grace user time to the entry
*/
m = ch_calloc( sizeof(Modifications), 1 );
m->sml_op = LDAP_MOD_ADD;
m->sml_flags = 0;
m->sml_type = ad_pwdGraceUseTime->ad_cname;
m->sml_desc = ad_pwdGraceUseTime;
m->sml_numvals = 1;
m->sml_values = ch_calloc( sizeof(struct berval), 2 );
m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
ber_dupbv( &m->sml_values[0], &timestamp );
ber_dupbv( &m->sml_nvalues[0], &timestamp );
m->sml_next = mod;
mod = m;
check_expiring_password:
/*
* Now we need to check to see
* if it is about to expire, and if so, should the user
* be warned about it in the password policy control.
*
* If the password has expired, and we're in the grace period, then
* we don't need to do this bit. Similarly, if we don't have password
* aging, then there's no need to do this bit either.
*/
if ((ppb->pp.pwdMaxAge < 1) || (pwExpired) || (ppb->pp.pwdExpireWarning < 1))
goto done;
age = (int)(now - pwtime);
/*
* We know that there is a password Change Time attribute - if
* there wasn't, then the pwdExpired value would be true, unless
* there is no password aging - and if there is no password aging,
* then this section isn't called anyway - you can't have an
* expiring password if there's no limit to expire.
*/
if (ppb->pp.pwdMaxAge - age < ppb->pp.pwdExpireWarning ) {
/*
* Set the warning value.
*/
warn = ppb->pp.pwdMaxAge - age; /* seconds left until expiry */
if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
Debug( LDAP_DEBUG_ANY,
"ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
op->o_req_dn.bv_val, warn, 0 );
}
}
done:
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
locked:
if ( mod ) {
Operation op2 = *op;
SlapReply r2 = { REP_RESULT };
slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
pp_info *pi = on->on_bi.bi_private;
LDAPControl c, *ca[2];
op2.o_tag = LDAP_REQ_MODIFY;
op2.o_callback = &cb;
op2.orm_modlist = mod;
op2.orm_no_opattrs = 0;
op2.o_dn = op->o_bd->be_rootdn;
op2.o_ndn = op->o_bd->be_rootndn;
/* If this server is a shadow and forward_updates is true,
* use the frontend to perform this modify. That will trigger
* the update referral, which can then be forwarded by the
* chain overlay. Obviously the updateref and chain overlay
* must be configured appropriately for this to be useful.
*/
if ( SLAP_SHADOW( op->o_bd ) && pi->forward_updates ) {
op2.o_bd = frontendDB;
/* Must use Relax control since these are no-user-mod */
op2.o_relax = SLAP_CONTROL_CRITICAL;
op2.o_ctrls = ca;
ca[0] = &c;
ca[1] = NULL;
BER_BVZERO( &c.ldctl_value );
c.ldctl_iscritical = 1;
c.ldctl_oid = LDAP_CONTROL_RELAX;
} else {
/* If not forwarding, don't update opattrs and don't replicate */
if ( SLAP_SINGLE_SHADOW( op->o_bd )) {
op2.orm_no_opattrs = 1;
op2.o_dont_replicate = 1;
}
op2.o_bd->bd_info = (BackendInfo *)on->on_info;
}
rc = op2.o_bd->be_modify( &op2, &r2 );
slap_mods_free( mod, 1 );
}
if ( ppb->send_ctrl ) {
LDAPControl *ctrl = NULL;
pp_info *pi = on->on_bi.bi_private;
/* Do we really want to tell that the account is locked? */
if ( ppb->pErr == PP_accountLocked && !pi->use_lockout ) {
ppb->pErr = PP_noError;
}
ctrl = create_passcontrol( op, warn, ngut, ppb->pErr );
ppb->oldctrls = add_passcontrol( op, rs, ctrl );
op->o_callback->sc_cleanup = ppolicy_ctrls_cleanup;
}
op->o_bd->bd_info = bi;
return SLAP_CB_CONTINUE;
}
static int
ppolicy_bind( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
/* Reset lockout status on all Bind requests */
if ( !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
}
/* Root bypasses policy */
if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn )) {
Entry *e;
int rc;
ppbind *ppb;
slap_callback *cb;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
if ( rc != LDAP_SUCCESS ) {
return SLAP_CB_CONTINUE;
}
cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1, op->o_tmpmemctx );
ppb = (ppbind *)(cb+1);
ppb->on = on;
ppb->pErr = PP_noError;
ppb->set_restrict = 1;
/* Setup a callback so we can munge the result */
cb->sc_response = ppolicy_bind_response;
cb->sc_next = op->o_callback->sc_next;
cb->sc_private = ppb;
op->o_callback->sc_next = cb;
/* Did we receive a password policy request control? */
if ( op->o_ctrlflag[ppolicy_cid] ) {
ppb->send_ctrl = 1;
}
op->o_bd->bd_info = (BackendInfo *)on;
ppolicy_get( op, e, &ppb->pp );
rc = account_locked( op, e, &ppb->pp, &ppb->mod );
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
if ( rc ) {
ppb->pErr = PP_accountLocked;
send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
return rs->sr_err;
}
}
return SLAP_CB_CONTINUE;
}
/* Reset the restricted info for the next session on this connection */
static int
ppolicy_connection_destroy( BackendDB *bd, Connection *conn )
{
if ( pwcons && !BER_BVISEMPTY( &pwcons[conn->c_conn_idx].dn )) {
ch_free( pwcons[conn->c_conn_idx].dn.bv_val );
BER_BVZERO( &pwcons[conn->c_conn_idx].dn );
}
return SLAP_CB_CONTINUE;
}
/* Check if this connection is restricted */
static int
ppolicy_restrict(
Operation *op,
SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
int send_ctrl = 0;
/* Did we receive a password policy request control? */
if ( op->o_ctrlflag[ppolicy_cid] ) {
send_ctrl = 1;
}
if ( op->o_conn && !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
LDAPControl **oldctrls;
/* if the current authcDN doesn't match the one we recorded,
* then an intervening Bind has succeeded and the restriction
* no longer applies. (ITS#4516)
*/
if ( !dn_match( &op->o_conn->c_ndn,
&pwcons[op->o_conn->c_conn_idx].dn )) {
ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
return SLAP_CB_CONTINUE;
}
Debug( LDAP_DEBUG_TRACE,
"connection restricted to password changing only\n", 0, 0, 0);
if ( send_ctrl ) {
LDAPControl *ctrl = NULL;
ctrl = create_passcontrol( op, -1, -1, PP_changeAfterReset );
oldctrls = add_passcontrol( op, rs, ctrl );
}
op->o_bd->bd_info = (BackendInfo *)on->on_info;
send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
"Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
if ( send_ctrl ) {
ctrls_cleanup( op, rs, oldctrls );
}
return rs->sr_err;
}
return SLAP_CB_CONTINUE;
}
static int
ppolicy_compare_response(
Operation *op,
SlapReply *rs )
{
/* map compare responses to bind responses */
if ( rs->sr_err == LDAP_COMPARE_TRUE )
rs->sr_err = LDAP_SUCCESS;
else if ( rs->sr_err == LDAP_COMPARE_FALSE )
rs->sr_err = LDAP_INVALID_CREDENTIALS;
ppolicy_bind_response( op, rs );
/* map back to compare */
if ( rs->sr_err == LDAP_SUCCESS )
rs->sr_err = LDAP_COMPARE_TRUE;
else if ( rs->sr_err == LDAP_INVALID_CREDENTIALS )
rs->sr_err = LDAP_COMPARE_FALSE;
return SLAP_CB_CONTINUE;
}
static int
ppolicy_compare(
Operation *op,
SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
return rs->sr_err;
/* Did we receive a password policy request control?
* Are we testing the userPassword?
*/
if ( op->o_ctrlflag[ppolicy_cid] &&
op->orc_ava->aa_desc == slap_schema.si_ad_userPassword ) {
Entry *e;
int rc;
ppbind *ppb;
slap_callback *cb;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
if ( rc != LDAP_SUCCESS ) {
return SLAP_CB_CONTINUE;
}
cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1, op->o_tmpmemctx );
ppb = (ppbind *)(cb+1);
ppb->on = on;
ppb->pErr = PP_noError;
ppb->send_ctrl = 1;
/* failures here don't lockout the connection */
ppb->set_restrict = 0;
/* Setup a callback so we can munge the result */
cb->sc_response = ppolicy_compare_response;
cb->sc_next = op->o_callback->sc_next;
cb->sc_private = ppb;
op->o_callback->sc_next = cb;
op->o_bd->bd_info = (BackendInfo *)on;
ppolicy_get( op, e, &ppb->pp );
rc = account_locked( op, e, &ppb->pp, &ppb->mod );
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
if ( rc ) {
ppb->pErr = PP_accountLocked;
send_ldap_error( op, rs, LDAP_COMPARE_FALSE, NULL );
return rs->sr_err;
}
}
return SLAP_CB_CONTINUE;
}
static int
ppolicy_add(
Operation *op,
SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
pp_info *pi = on->on_bi.bi_private;
PassPolicy pp;
Attribute *pa;
const char *txt;
if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
return rs->sr_err;
/* If this is a replica, assume the master checked everything */
if ( be_shadow_update( op ))
return SLAP_CB_CONTINUE;
/* Check for password in entry */
if ((pa = attr_find( op->oq_add.rs_e->e_attrs,
slap_schema.si_ad_userPassword )))
{
assert( pa->a_vals != NULL );
assert( !BER_BVISNULL( &pa->a_vals[ 0 ] ) );
if ( !BER_BVISNULL( &pa->a_vals[ 1 ] ) ) {
send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, "Password policy only allows one password value" );
return rs->sr_err;
}
/*
* new entry contains a password - if we're not the root user
* then we need to check that the password fits in with the
* security policy for the new entry.
*/
ppolicy_get( op, op->ora_e, &pp );
if (pp.pwdCheckQuality > 0 && !be_isroot( op )) {
struct berval *bv = &(pa->a_vals[0]);
int rc, send_ctrl = 0;
LDAPPasswordPolicyError pErr = PP_noError;
char *txt;
/* Did we receive a password policy request control? */
if ( op->o_ctrlflag[ppolicy_cid] ) {
send_ctrl = 1;
}
rc = check_password_quality( bv, &pp, &pErr, op->ora_e, &txt );
if (rc != LDAP_SUCCESS) {
LDAPControl **oldctrls = NULL;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
if ( send_ctrl ) {
LDAPControl *ctrl = NULL;
ctrl = create_passcontrol( op, -1, -1, pErr );
oldctrls = add_passcontrol( op, rs, ctrl );
}
send_ldap_error( op, rs, rc, txt ? txt : "Password fails quality checking policy" );
if ( txt ) {
free( txt );
}
if ( send_ctrl ) {
ctrls_cleanup( op, rs, oldctrls );
}
return rs->sr_err;
}
}
/*
* A controversial bit. We hash cleartext
* passwords provided via add and modify operations
* You're not really supposed to do this, since
* the X.500 model says "store attributes" as they
* get provided. By default, this is what we do
*
* But if the hash_passwords flag is set, we hash
* any cleartext password attribute values via the
* default password hashing scheme.
*/
if ((pi->hash_passwords) &&
(password_scheme( &(pa->a_vals[0]), NULL ) != LDAP_SUCCESS)) {
struct berval hpw;
slap_passwd_hash( &(pa->a_vals[0]), &hpw, &txt );
if (hpw.bv_val == NULL) {
/*
* hashing didn't work. Emit an error.
*/
rs->sr_err = LDAP_OTHER;
rs->sr_text = txt;
send_ldap_error( op, rs, LDAP_OTHER, "Password hashing failed" );
return rs->sr_err;
}
memset( pa->a_vals[0].bv_val, 0, pa->a_vals[0].bv_len);
ber_memfree( pa->a_vals[0].bv_val );
pa->a_vals[0].bv_val = hpw.bv_val;
pa->a_vals[0].bv_len = hpw.bv_len;
}
/* If password aging is in effect, set the pwdChangedTime */
if ( pp.pwdMaxAge || pp.pwdMinAge ) {
struct berval timestamp;
char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
time_t now = slap_get_time();
timestamp.bv_val = timebuf;
timestamp.bv_len = sizeof(timebuf);
slap_timestamp( &now, &timestamp );
attr_merge_one( op->ora_e, ad_pwdChangedTime, &timestamp, &timestamp );
}
}
return SLAP_CB_CONTINUE;
}
static int
ppolicy_mod_cb( Operation *op, SlapReply *rs )
{
slap_callback *sc = op->o_callback;
op->o_callback = sc->sc_next;
if ( rs->sr_err == LDAP_SUCCESS ) {
ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
}
op->o_tmpfree( sc, op->o_tmpmemctx );
return SLAP_CB_CONTINUE;
}
static int
ppolicy_modify( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
pp_info *pi = on->on_bi.bi_private;
int i, rc, mod_pw_only, pwmod, pwmop = -1, deladd,
hsize = 0;
PassPolicy pp;
Modifications *mods = NULL, *modtail = NULL,
*ml, *delmod, *addmod;
Attribute *pa, *ha, at;
const char *txt;
pw_hist *tl = NULL, *p;
int zapReset, send_ctrl = 0, free_txt = 0;
Entry *e;
struct berval newpw = BER_BVNULL, oldpw = BER_BVNULL,
*bv, cr[2];
LDAPPasswordPolicyError pErr = PP_noError;
LDAPControl *ctrl = NULL;
LDAPControl **oldctrls = NULL;
int is_pwdexop = 0;
int got_del_grace = 0, got_del_lock = 0, got_pw = 0, got_del_fail = 0;
int got_changed = 0, got_history = 0;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
op->o_bd->bd_info = (BackendInfo *)on;
if ( rc != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
/* If this is a replica, we may need to tweak some of the
* master's modifications. Otherwise, just pass it through.
*/
if ( be_shadow_update( op )) {
Modifications **prev;
Attribute *a_grace, *a_lock, *a_fail;
a_grace = attr_find( e->e_attrs, ad_pwdGraceUseTime );
a_lock = attr_find( e->e_attrs, ad_pwdAccountLockedTime );
a_fail = attr_find( e->e_attrs, ad_pwdFailureTime );
for( prev = &op->orm_modlist, ml = *prev; ml; ml = *prev ) {
if ( ml->sml_desc == slap_schema.si_ad_userPassword )
got_pw = 1;
/* If we're deleting an attr that didn't exist,
* drop this delete op
*/
if ( ml->sml_op == LDAP_MOD_DELETE ) {
int drop = 0;
if ( ml->sml_desc == ad_pwdGraceUseTime ) {
if ( !a_grace || got_del_grace ) {
drop = 1;
} else {
got_del_grace = 1;
}
} else
if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
if ( !a_lock || got_del_lock ) {
drop = 1;
} else {
got_del_lock = 1;
}
} else
if ( ml->sml_desc == ad_pwdFailureTime ) {
if ( !a_fail || got_del_fail ) {
drop = 1;
} else {
got_del_fail = 1;
}
}
if ( drop ) {
*prev = ml->sml_next;
ml->sml_next = NULL;
slap_mods_free( ml, 1 );
continue;
}
}
prev = &ml->sml_next;
}
/* If we're resetting the password, make sure grace, accountlock,
* and failure also get removed.
*/
if ( got_pw ) {
if ( a_grace && !got_del_grace ) {
ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
ml->sml_op = LDAP_MOD_DELETE;
ml->sml_flags = SLAP_MOD_INTERNAL;
ml->sml_type.bv_val = NULL;
ml->sml_desc = ad_pwdGraceUseTime;
ml->sml_numvals = 0;
ml->sml_values = NULL;
ml->sml_nvalues = NULL;
ml->sml_next = NULL;
*prev = ml;
prev = &ml->sml_next;
}
if ( a_lock && !got_del_lock ) {
ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
ml->sml_op = LDAP_MOD_DELETE;
ml->sml_flags = SLAP_MOD_INTERNAL;
ml->sml_type.bv_val = NULL;
ml->sml_desc = ad_pwdAccountLockedTime;
ml->sml_numvals = 0;
ml->sml_values = NULL;
ml->sml_nvalues = NULL;
ml->sml_next = NULL;
*prev = ml;
}
if ( a_fail && !got_del_fail ) {
ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
ml->sml_op = LDAP_MOD_DELETE;
ml->sml_flags = SLAP_MOD_INTERNAL;
ml->sml_type.bv_val = NULL;
ml->sml_desc = ad_pwdFailureTime;
ml->sml_numvals = 0;
ml->sml_values = NULL;
ml->sml_nvalues = NULL;
ml->sml_next = NULL;
*prev = ml;
}
}
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
return SLAP_CB_CONTINUE;
}
/* Did we receive a password policy request control? */
if ( op->o_ctrlflag[ppolicy_cid] ) {
send_ctrl = 1;
}
/* See if this is a pwdModify exop. If so, we can
* access the plaintext passwords from that request.
*/
{
slap_callback *sc;
for ( sc = op->o_callback; sc; sc=sc->sc_next ) {
if ( sc->sc_response == slap_null_cb &&
sc->sc_private ) {
req_pwdexop_s *qpw = sc->sc_private;
newpw = qpw->rs_new;
oldpw = qpw->rs_old;
is_pwdexop = 1;
break;
}
}
}
ppolicy_get( op, e, &pp );
for ( ml = op->orm_modlist,
pwmod = 0, mod_pw_only = 1,
deladd = 0, delmod = NULL,
addmod = NULL,
zapReset = 1;
ml != NULL; modtail = ml, ml = ml->sml_next )
{
if ( ml->sml_desc == pp.ad ) {
pwmod = 1;
pwmop = ml->sml_op;
if ((deladd == 0) && (ml->sml_op == LDAP_MOD_DELETE) &&
(ml->sml_values) && !BER_BVISNULL( &ml->sml_values[0] ))
{
deladd = 1;
delmod = ml;
}
if ((ml->sml_op == LDAP_MOD_ADD) ||
(ml->sml_op == LDAP_MOD_REPLACE))
{
if ( ml->sml_values && !BER_BVISNULL( &ml->sml_values[0] )) {
if ( deladd == 1 )
deladd = 2;
/* FIXME: there's no easy way to ensure
* that add does not cause multiple
* userPassword values; one way (that
* would be consistent with the single
* password constraint) would be to turn
* add into replace); another would be
* to disallow add.
*
* Let's check at least that a single value
* is being added
*/
if ( addmod || !BER_BVISNULL( &ml->sml_values[ 1 ] ) ) {
rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
rs->sr_text = "Password policy only allows one password value";
goto return_results;
}
addmod = ml;
} else {
/* replace can have no values, add cannot */
assert( ml->sml_op == LDAP_MOD_REPLACE );
}
}
} else if ( !(ml->sml_flags & SLAP_MOD_INTERNAL) && !is_at_operational( ml->sml_desc->ad_type ) ) {
mod_pw_only = 0;
/* modifying something other than password */
}
/*
* If there is a request to explicitly add a pwdReset
* attribute, then we suppress the normal behaviour on
* password change, which is to remove the pwdReset
* attribute.
*
* This enables an administrator to assign a new password
* and place a "must reset" flag on the entry, which will
* stay until the user explicitly changes his/her password.
*/
if (ml->sml_desc == ad_pwdReset ) {
if ((ml->sml_op == LDAP_MOD_ADD) ||
(ml->sml_op == LDAP_MOD_REPLACE))
zapReset = 0;
}
if ( ml->sml_op == LDAP_MOD_DELETE ) {
if ( ml->sml_desc == ad_pwdGraceUseTime ) {
got_del_grace = 1;
} else if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
got_del_lock = 1;
} else if ( ml->sml_desc == ad_pwdFailureTime ) {
got_del_fail = 1;
}
}
if ( ml->sml_desc == ad_pwdChangedTime ) {
got_changed = 1;
} else if (ml->sml_desc == ad_pwdHistory ) {
got_history = 1;
}
}
if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn ) && !mod_pw_only ) {
if ( dn_match( &op->o_conn->c_ndn,
&pwcons[op->o_conn->c_conn_idx].dn )) {
Debug( LDAP_DEBUG_TRACE,
"connection restricted to password changing only\n", 0, 0, 0 );
rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
pErr = PP_changeAfterReset;
goto return_results;
} else {
ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
}
}
/*
* if we have a "safe password modify policy", then we need to check if we're doing
* a delete (with the old password), followed by an add (with the new password).
*
* If we got just a delete with nothing else, just let it go. We also skip all the checks if
* the root user is bound. Root can do anything, including avoid the policies.
*/
if (!pwmod) goto do_modify;
/*
* Build the password history list in ascending time order
* We need this, even if the user is root, in order to maintain
* the pwdHistory operational attributes properly.
*/
if (addmod && pp.pwdInHistory > 0 && (ha = attr_find( e->e_attrs, ad_pwdHistory ))) {
struct berval oldpw;
time_t oldtime;
for(i=0; ha->a_nvals[i].bv_val; i++) {
rc = parse_pwdhistory( &(ha->a_nvals[i]), NULL,
&oldtime, &oldpw );
if (rc != LDAP_SUCCESS) continue; /* invalid history entry */
if (oldpw.bv_val) {
add_to_pwd_history( &tl, oldtime, &oldpw,
&(ha->a_nvals[i]) );
oldpw.bv_val = NULL;
oldpw.bv_len = 0;
}
}
for(p=tl; p; p=p->next, hsize++); /* count history size */
}
if (be_isroot( op )) goto do_modify;
/* NOTE: according to draft-behera-ldap-password-policy
* pwdAllowUserChange == FALSE must only prevent pwd changes
* by the user the pwd belongs to (ITS#7021) */
if (!pp.pwdAllowUserChange && dn_match(&op->o_req_ndn, &op->o_ndn)) {
rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
rs->sr_text = "User alteration of password is not allowed";
pErr = PP_passwordModNotAllowed;
goto return_results;
}
/* Just deleting? */
if (!addmod) {
/* skip everything else */
pwmod = 0;
goto do_modify;
}
/* This is a pwdModify exop that provided the old pw.
* We need to create a Delete mod for this old pw and
* let the matching value get found later
*/
if (pp.pwdSafeModify && oldpw.bv_val ) {
ml = (Modifications *)ch_calloc( sizeof( Modifications ), 1 );
ml->sml_op = LDAP_MOD_DELETE;
ml->sml_flags = SLAP_MOD_INTERNAL;
ml->sml_desc = pp.ad;
ml->sml_type = pp.ad->ad_cname;
ml->sml_numvals = 1;
ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
ber_dupbv( &ml->sml_values[0], &oldpw );
BER_BVZERO( &ml->sml_values[1] );
ml->sml_next = op->orm_modlist;
op->orm_modlist = ml;
delmod = ml;
deladd = 2;
}
if (pp.pwdSafeModify && deladd != 2) {
Debug( LDAP_DEBUG_TRACE,
"change password must use DELETE followed by ADD/REPLACE\n",
0, 0, 0 );
rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
rs->sr_text = "Must supply old password to be changed as well as new one";
pErr = PP_mustSupplyOldPassword;
goto return_results;
}
/* Check age, but only if pwdReset is not TRUE */
pa = attr_find( e->e_attrs, ad_pwdReset );
if ((!pa || !bvmatch( &pa->a_nvals[0], &slap_true_bv )) &&
pp.pwdMinAge > 0) {
time_t pwtime = (time_t)-1, now;
int age;
if ((pa = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
pwtime = parse_time( pa->a_nvals[0].bv_val );
now = slap_get_time();
age = (int)(now - pwtime);
if ((pwtime != (time_t)-1) && (age < pp.pwdMinAge)) {
rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
rs->sr_text = "Password is too young to change";
pErr = PP_passwordTooYoung;
goto return_results;
}
}
/* pa is used in password history check below, be sure it's set */
if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL && delmod) {
/*
* we have a password to check
*/
bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
/* FIXME: no access checking? */
rc = slap_passwd_check( op, NULL, pa, bv, &txt );
if (rc != LDAP_SUCCESS) {
Debug( LDAP_DEBUG_TRACE,
"old password check failed: %s\n", txt, 0, 0 );
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
rs->sr_text = "Must supply correct old password to change to new one";
pErr = PP_mustSupplyOldPassword;
goto return_results;
} else {
int i;
/*
* replace the delete value with the (possibly hashed)
* value which is currently in the password.
*/
for ( i = 0; !BER_BVISNULL( &delmod->sml_values[i] ); i++ ) {
free( delmod->sml_values[i].bv_val );
BER_BVZERO( &delmod->sml_values[i] );
}
free( delmod->sml_values );
delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
BER_BVZERO( &delmod->sml_values[1] );
ber_dupbv( &(delmod->sml_values[0]), &(pa->a_nvals[0]) );
}
}
bv = newpw.bv_val ? &newpw : &addmod->sml_values[0];
if (pp.pwdCheckQuality > 0) {
rc = check_password_quality( bv, &pp, &pErr, e, (char **)&txt );
if (rc != LDAP_SUCCESS) {
rs->sr_err = rc;
if ( txt ) {
rs->sr_text = txt;
free_txt = 1;
} else {
rs->sr_text = "Password fails quality checking policy";
}
goto return_results;
}
}
/* If pwdInHistory is zero, passwords may be reused */
if (pa && pp.pwdInHistory > 0) {
/*
* Last check - the password history.
*/
/* FIXME: no access checking? */
if (slap_passwd_check( op, NULL, pa, bv, &txt ) == LDAP_SUCCESS) {
/*
* This is bad - it means that the user is attempting
* to set the password to the same as the old one.
*/
rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
rs->sr_text = "Password is not being changed from existing value";
pErr = PP_passwordInHistory;
goto return_results;
}
/*
* Iterate through the password history, and fail on any
* password matches.
*/
at = *pa;
at.a_vals = cr;
cr[1].bv_val = NULL;
for(p=tl; p; p=p->next) {
cr[0] = p->pw;
/* FIXME: no access checking? */
rc = slap_passwd_check( op, NULL, &at, bv, &txt );
if (rc != LDAP_SUCCESS) continue;
rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
rs->sr_text = "Password is in history of old passwords";
pErr = PP_passwordInHistory;
goto return_results;
}
}
do_modify:
if (pwmod) {
struct berval timestamp;
char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
time_t now = slap_get_time();
/* If the conn is restricted, set a callback to clear it
* if the pwmod succeeds
*/
if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
slap_callback *sc = op->o_tmpcalloc( 1, sizeof( slap_callback ),
op->o_tmpmemctx );
sc->sc_next = op->o_callback;
/* Must use sc_response to insure we reset on success, before
* the client sees the response. Must use sc_cleanup to insure
* that it gets cleaned up if sc_response is not called.
*/
sc->sc_response = ppolicy_mod_cb;
sc->sc_cleanup = ppolicy_mod_cb;
op->o_callback = sc;
}
/*
* keep the necessary pwd.. operational attributes
* up to date.
*/
if (!got_changed) {
timestamp.bv_val = timebuf;
timestamp.bv_len = sizeof(timebuf);
slap_timestamp( &now, &timestamp );
mods = NULL;
if (pwmop != LDAP_MOD_DELETE) {
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_REPLACE;
mods->sml_numvals = 1;
mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
ber_dupbv( &mods->sml_values[0], &timestamp );
BER_BVZERO( &mods->sml_values[1] );
assert( !BER_BVISNULL( &mods->sml_values[0] ) );
} else if (attr_find(e->e_attrs, ad_pwdChangedTime )) {
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_DELETE;
}
if (mods) {
mods->sml_desc = ad_pwdChangedTime;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
}
}
if (!got_del_grace && attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_DELETE;
mods->sml_desc = ad_pwdGraceUseTime;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
}
if (!got_del_lock && attr_find(e->e_attrs, ad_pwdAccountLockedTime )) {
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_DELETE;
mods->sml_desc = ad_pwdAccountLockedTime;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
}
if (!got_del_fail && attr_find(e->e_attrs, ad_pwdFailureTime )) {
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_DELETE;
mods->sml_desc = ad_pwdFailureTime;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
}
/* Delete the pwdReset attribute, since it's being reset */
if ((zapReset) && (attr_find(e->e_attrs, ad_pwdReset ))) {
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_DELETE;
mods->sml_desc = ad_pwdReset;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
}
if (!got_history && pp.pwdInHistory > 0) {
if (hsize >= pp.pwdInHistory) {
/*
* We use the >= operator, since we are going to add
* the existing password attribute value into the
* history - thus the cardinality of history values is
* about to rise by one.
*
* If this would push it over the limit of history
* values (remembering - the password policy could have
* changed since the password was last altered), we must
* delete at least 1 value from the pwdHistory list.
*
* In fact, we delete '(#pwdHistory attrs - max pwd
* history length) + 1' values, starting with the oldest.
* This is easily evaluated, since the linked list is
* created in ascending time order.
*/
mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
mods->sml_op = LDAP_MOD_DELETE;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_desc = ad_pwdHistory;
mods->sml_numvals = hsize - pp.pwdInHistory + 1;
mods->sml_values = ch_calloc( sizeof( struct berval ),
hsize - pp.pwdInHistory + 2 );
BER_BVZERO( &mods->sml_values[ hsize - pp.pwdInHistory + 1 ] );
for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
BER_BVZERO( &mods->sml_values[i] );
ber_dupbv( &(mods->sml_values[i]), &p->bv );
}
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
}
free_pwd_history_list( &tl );
/*
* Now add the existing password into the history list.
* This will be executed even if the operation is to delete
* the password entirely.
*
* This isn't in the spec explicitly, but it seems to make
* sense that the password history list is the list of all
* previous passwords - even if they were deleted. Thus, if
* someone tries to add a historical password at some future
* point, it will fail.
*/
if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
mods->sml_op = LDAP_MOD_ADD;
mods->sml_flags = SLAP_MOD_INTERNAL;
mods->sml_type.bv_val = NULL;
mods->sml_desc = ad_pwdHistory;
mods->sml_nvalues = NULL;
mods->sml_numvals = 1;
mods->sml_values = ch_calloc( sizeof( struct berval ), 2 );
mods->sml_values[ 1 ].bv_val = NULL;
mods->sml_values[ 1 ].bv_len = 0;
make_pwd_history_value( timebuf, &mods->sml_values[0], pa );
mods->sml_next = NULL;
modtail->sml_next = mods;
modtail = mods;
} else {
Debug( LDAP_DEBUG_TRACE,
"ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
}
}
/*
* Controversial bit here. If the new password isn't hashed
* (ie, is cleartext), we probably should hash it according
* to the default hash. The reason for this is that we want
* to use the policy if possible, but if we hash the password
* before, then we're going to run into trouble when it
* comes time to check the password.
*
* Now, the right thing to do is to use the extended password
* modify operation, but not all software can do this,
* therefore it makes sense to hash the new password, now
* we know it passes the policy requirements.
*
* Of course, if the password is already hashed, then we
* leave it alone.
*/
if ((pi->hash_passwords) && (addmod) && !newpw.bv_val &&
(password_scheme( &(addmod->sml_values[0]), NULL ) != LDAP_SUCCESS))
{
struct berval hpw, bv;
slap_passwd_hash( &(addmod->sml_values[0]), &hpw, &txt );
if (hpw.bv_val == NULL) {
/*
* hashing didn't work. Emit an error.
*/
rs->sr_err = LDAP_OTHER;
rs->sr_text = txt;
goto return_results;
}
bv = addmod->sml_values[0];
/* clear and discard the clear password */
memset(bv.bv_val, 0, bv.bv_len);
ber_memfree(bv.bv_val);
addmod->sml_values[0] = hpw;
}
}
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
return SLAP_CB_CONTINUE;
return_results:
free_pwd_history_list( &tl );
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
if ( send_ctrl ) {
ctrl = create_passcontrol( op, -1, -1, pErr );
oldctrls = add_passcontrol( op, rs, ctrl );
}
send_ldap_result( op, rs );
if ( free_txt ) {
free( (char *)txt );
rs->sr_text = NULL;
}
if ( send_ctrl ) {
if ( is_pwdexop ) {
if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
op->o_tmpfree( oldctrls, op->o_tmpmemctx );
}
oldctrls = NULL;
rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
} else {
ctrls_cleanup( op, rs, oldctrls );
}
}
return rs->sr_err;
}
static int
ppolicy_parseCtrl(
Operation *op,
SlapReply *rs,
LDAPControl *ctrl )
{
if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
rs->sr_text = "passwordPolicyRequest control value not absent";
return LDAP_PROTOCOL_ERROR;
}
op->o_ctrlflag[ppolicy_cid] = ctrl->ldctl_iscritical
? SLAP_CONTROL_CRITICAL
: SLAP_CONTROL_NONCRITICAL;
return LDAP_SUCCESS;
}
static int
attrPretty(
Syntax *syntax,
struct berval *val,
struct berval *out,
void *ctx )
{
AttributeDescription *ad = NULL;
const char *err;
int code;
code = slap_bv2ad( val, &ad, &err );
if ( !code ) {
ber_dupbv_x( out, &ad->ad_type->sat_cname, ctx );
}
return code;
}
static int
attrNormalize(
slap_mask_t use,
Syntax *syntax,
MatchingRule *mr,
struct berval *val,
struct berval *out,
void *ctx )
{
AttributeDescription *ad = NULL;
const char *err;
int code;
code = slap_bv2ad( val, &ad, &err );
if ( !code ) {
ber_str2bv_x( ad->ad_type->sat_oid, 0, 1, out, ctx );
}
return code;
}
static int
ppolicy_db_init(
BackendDB *be,
ConfigReply *cr
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
if ( SLAP_ISGLOBALOVERLAY( be ) ) {
/* do not allow slapo-ppolicy to be global by now (ITS#5858) */
if ( cr ){
snprintf( cr->msg, sizeof(cr->msg),
"slapo-ppolicy cannot be global" );
Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
}
return 1;
}
/* Has User Schema been initialized yet? */
if ( !pwd_UsSchema[0].ad[0] ) {
const char *err;
int i, code;
for (i=0; pwd_UsSchema[i].def; i++) {
code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
if ( code ) {
if ( cr ){
snprintf( cr->msg, sizeof(cr->msg),
"User Schema load failed for attribute \"%s\". Error code %d: %s",
pwd_UsSchema[i].def, code, err );
Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
}
return code;
}
}
{
Syntax *syn;
MatchingRule *mr;
syn = ch_malloc( sizeof( Syntax ));
*syn = *ad_pwdAttribute->ad_type->sat_syntax;
syn->ssyn_pretty = attrPretty;
ad_pwdAttribute->ad_type->sat_syntax = syn;
mr = ch_malloc( sizeof( MatchingRule ));
*mr = *ad_pwdAttribute->ad_type->sat_equality;
mr->smr_normalize = attrNormalize;
ad_pwdAttribute->ad_type->sat_equality = mr;
}
}
on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
if ( dtblsize && !pwcons ) {
/* accommodate for c_conn_idx == -1 */
pwcons = ch_calloc( sizeof(pw_conn), dtblsize + 1 );
pwcons++;
}
ov_count++;
return 0;
}
static int
ppolicy_db_open(
BackendDB *be,
ConfigReply *cr
)
{
return overlay_register_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
}
static int
ppolicy_db_close(
BackendDB *be,
ConfigReply *cr
)
{
#ifdef SLAP_CONFIG_DELETE
overlay_unregister_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
#endif /* SLAP_CONFIG_DELETE */
return 0;
}
static int
ppolicy_db_destroy(
BackendDB *be,
ConfigReply *cr
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
pp_info *pi = on->on_bi.bi_private;
on->on_bi.bi_private = NULL;
free( pi->def_policy.bv_val );
free( pi );
ov_count--;
if ( ov_count <=0 && pwcons ) {
pw_conn *pwc = pwcons;
pwcons = NULL;
pwc--;
ch_free( pwc );
}
return 0;
}
static char *extops[] = {
LDAP_EXOP_MODIFY_PASSWD,
NULL
};
static slap_overinst ppolicy;
int ppolicy_initialize()
{
int i, code;
for (i=0; pwd_OpSchema[i].def; i++) {
code = register_at( pwd_OpSchema[i].def, pwd_OpSchema[i].ad, 0 );
if ( code ) {
Debug( LDAP_DEBUG_ANY,
"ppolicy_initialize: register_at failed\n", 0, 0, 0 );
return code;
}
/* Allow Manager to set these as needed */
if ( is_at_no_user_mod( (*pwd_OpSchema[i].ad)->ad_type )) {
(*pwd_OpSchema[i].ad)->ad_type->sat_flags |=
SLAP_AT_MANAGEABLE;
}
}
code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, extops,
ppolicy_parseCtrl, &ppolicy_cid );
if ( code != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY, "Failed to register control %d\n", code, 0, 0 );
return code;
}
ldap_pvt_thread_mutex_init( &chk_syntax_mutex );
ppolicy.on_bi.bi_type = "ppolicy";
ppolicy.on_bi.bi_db_init = ppolicy_db_init;
ppolicy.on_bi.bi_db_open = ppolicy_db_open;
ppolicy.on_bi.bi_db_close = ppolicy_db_close;
ppolicy.on_bi.bi_db_destroy = ppolicy_db_destroy;
ppolicy.on_bi.bi_op_add = ppolicy_add;
ppolicy.on_bi.bi_op_bind = ppolicy_bind;
ppolicy.on_bi.bi_op_compare = ppolicy_compare;
ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
ppolicy.on_bi.bi_op_modify = ppolicy_modify;
ppolicy.on_bi.bi_op_search = ppolicy_restrict;
ppolicy.on_bi.bi_connection_destroy = ppolicy_connection_destroy;
ppolicy.on_bi.bi_cf_ocs = ppolicyocs;
code = config_register_schema( ppolicycfg, ppolicyocs );
if ( code ) return code;
return overlay_register( &ppolicy );
}
#if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
int init_module(int argc, char *argv[]) {
return ppolicy_initialize();
}
#endif
#endif /* defined(SLAPD_OVER_PPOLICY) */
Reference in New Issue View Git Blame Copy Permalink