--- /dev/null
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2004 Howard Chu, Symas Corporation.
+ * 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"
+
+/* This file implements "Password Policy for LDAP Directories",
+ * based on draft behera-ldap-password-policy-07
+ */
+
+#ifdef SLAPD_OVER_PPOLICY
+
+#if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
+#define SLAPD_IMPORT
+#endif
+
+#include <ldap.h>
+#include "lutil.h"
+#include "slap.h"
+#include <ltdl.h>
+#include <ac/errno.h>
+#include <ac/time.h>
+#include <ac/string.h>
+
+#ifndef MODULE_NAME_SZ
+#define MODULE_NAME_SZ 256
+#endif
+
+/* Per-instance configuration information */
+typedef struct pp_info {
+ struct berval def_policy; /* DN of default policy subentry */
+} pp_info;
+
+/* Our per-connection info - note, it is not per-instance, it is
+ * used by all instances
+ */
+typedef struct pw_conn {
+ int restrict; /* TRUE if connection is restricted */
+} pw_conn;
+
+static pw_conn *pwcons;
+
+static long gmtoff; /* Offset of local time from GMT */
+
+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 pwdGraceLoginLimit; /* 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 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_pwdExpirationWarned, *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 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 USAGE directoryOperation )",
+ &ad_pwdAccountLockedTime },
+ { "( 1.3.6.1.4.1.42.2.27.8.1.18 "
+ "NAME ( 'pwdExpirationWarned' ) "
+ "DESC 'The time the user was first warned about the coming expiration of the password' "
+ "EQUALITY generalizedTimeMatch "
+ "ORDERING generalizedTimeOrderingMatch "
+ "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
+ "SINGLE-VALUE USAGE directoryOperation )",
+ &ad_pwdExpirationWarned },
+ { "( 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 "
+ "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 "
+ "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 "
+ "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 USAGE directoryOperation )",
+ &ad_pwdPolicySubentry },
+ { NULL, NULL }
+};
+
+/* User attributes */
+static AttributeDescription *ad_pwdMinAge, *ad_pwdMaxAge, *ad_pwdInHistory,
+ *ad_pwdCheckQuality, *ad_pwdMinLength, *ad_pwdMaxFailure,
+ *ad_pwdGraceLoginLimit, *ad_pwdExpireWarning, *ad_pwdLockoutDuration,
+ *ad_pwdFailureCountInterval, *ad_pwdCheckModule, *ad_pwdLockout,
+ *ad_pwdMustChange, *ad_pwdAllowUserChange, *ad_pwdSafeModify,
+ *ad_pwdAttribute;
+
+#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(pwdGraceLoginLimit),
+ 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;
+
+static time_t
+parse_time( char *atm )
+{
+ struct tm tm;
+
+ if (!atm) return (time_t)-1;
+
+ /*
+ * special case - if the lowest allowable GeneralizedTime is here, return
+ * this is as zero time. Note: this might also be the case if the value stored
+ * is equivalent to the start of the epoch (ie, Jan 1, 1970 at midnight.
+ */
+ if (strcmp(atm, "00000101000000Z") == 0) return (time_t)0;
+ /*
+ * else parse the time and return it's time_t value. This will be -1 if the
+ * text isn't a valid time string.
+ */
+ strptime( atm, "%Y%m%d%H%M%SZ", &tm );
+ tm.tm_isdst = 0;
+ return mktime(&tm) - gmtoff;
+}
+
+static int
+account_locked( Operation *op, Entry *e,
+ PassPolicy *pp, Modifications **mod )
+{
+ Attribute *la;
+ int rc;
+ Entry *de;
+
+ assert(mod);
+
+ 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;
+ struct berval bv;
+ Modifications *m;
+
+ if ((then = parse_time( vals[0].bv_val )) == (time_t)0)
+ return 1;
+
+ now = slap_get_time();
+
+ if (now < then + pp->pwdLockoutDuration)
+ return 1;
+
+ m = ch_calloc( sizeof(Modifications), 1 );
+ m->sml_op = LDAP_MOD_DELETE;
+ m->sml_type = ad_pwdAccountLockedTime->ad_cname;
+ m->sml_desc = ad_pwdAccountLockedTime;
+ m->sml_next = *mod;
+ *mod = m;
+ }
+ }
+
+ return 0;
+}
+
+#define PPOLICY_WARNING 0xa0L
+#define PPOLICY_ERROR 0xa1L
+
+#define PPOLICY_EXPIRE 0xa0L
+#define PPOLICY_GRACE 0xa1L
+
+static LDAPControl *
+create_passcontrol( int exptime, int grace, LDAPPasswordPolicyError err )
+{
+ char berbuf[LBER_ELEMENT_SIZEOF], bb2[LBER_ELEMENT_SIZEOF];
+ BerElement *ber = (BerElement *)berbuf, *b2 = (BerElement *)bb2;
+ LDAPControl *c;
+ struct berval bv;
+
+ if ((c = ch_calloc( sizeof( LDAPControl ), 1 )) == NULL) return NULL;
+ c->ldctl_oid = LDAP_CONTROL_PASSWORDPOLICYRESPONSE;
+ c->ldctl_iscritical = 0;
+ c->ldctl_value.bv_val = NULL;
+ c->ldctl_value.bv_len = 0;
+
+ 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 );
+ ber_flatten2( b2, &bv, 1 );
+ 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 );
+ ber_flatten2( b2, &bv, 1 );
+ 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), 1 ) == LBER_DEFAULT) {
+ ch_free(c);
+ (void)ber_free_buf(ber);
+ return NULL;
+ }
+ (void)ber_free_buf(ber);
+ return c;
+}
+
+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 i, rc, nent;
+ Entry *pe = NULL;
+ AttributeDescription *oca = slap_schema.si_ad_objectClass;
+ const char *text;
+ AttributeDescription *ad;
+ struct berval bv;
+ void *opr = op->o_private;
+
+ memset( pp, 0, sizeof(PassPolicy) );
+
+ 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) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ERR,
+ "ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
+#endif
+ goto defaultpol;
+ }
+ }
+
+ /* back-bdb stores lock info in o_private */
+ op->o_private = NULL;
+ 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 );
+#else
+ pp->ad = slap_schema.si_ad_userPassword;
+#endif
+
+ if ((a = attr_find( pe->e_attrs, ad_pwdMinAge )))
+ pp->pwdMinAge = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdMaxAge )))
+ pp->pwdMaxAge = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdInHistory )))
+ pp->pwdInHistory = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdCheckQuality )))
+ pp->pwdCheckQuality = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdMinLength )))
+ pp->pwdMinLength = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdMaxFailure )))
+ pp->pwdMaxFailure = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdGraceLoginLimit )))
+ pp->pwdGraceLoginLimit = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdExpireWarning )))
+ pp->pwdExpireWarning = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdFailureCountInterval )))
+ pp->pwdFailureCountInterval = atoi(a->a_vals[0].bv_val );
+ if ((a = attr_find( pe->e_attrs, ad_pwdLockoutDuration )))
+ pp->pwdLockoutDuration = atoi(a->a_vals[0].bv_val );
+
+ 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 = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
+ if ((a = attr_find( pe->e_attrs, ad_pwdMustChange )))
+ pp->pwdMustChange = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
+ if ((a = attr_find( pe->e_attrs, ad_pwdAllowUserChange )))
+ pp->pwdAllowUserChange = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
+ if ((a = attr_find( pe->e_attrs, ad_pwdSafeModify )))
+ pp->pwdSafeModify = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
+
+ op->o_bd->bd_info = (BackendInfo *)on->on_info;
+ be_entry_release_r( op, pe );
+ op->o_bd->bd_info = (BackendInfo *)on;
+
+ op->o_private = opr;
+ return;
+
+defaultpol:
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, DETAIL1,
+ "ppolicy_get: using default policy\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "ppolicy_get: using default policy\n", 0, 0, 0 );
+#endif
+ op->o_private = opr;
+ 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]) {
+ char *sc = ch_calloc( sizeof(char), e + 2);
+ sc[e + 1] = '\0'; /* terminate string */
+ strncpy( sc, cred->bv_val, e + 1);
+ e = lutil_passwd_scheme( sc );
+ free( sc );
+ if (e && 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 )
+{
+ int rc = LDAP_SUCCESS, ok = LDAP_SUCCESS;
+ char *ptr = cred->bv_val;
+ char *modpath;
+ struct berval sch;
+
+ assert( cred != NULL );
+ assert( pp != 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]) {
+ lt_dlhandle mod;
+ const char *err;
+
+ if ((mod = lt_dlopen( pp->pwdCheckModule )) == NULL) {
+ err = lt_dlerror();
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( SLAPD, CRIT,
+ "check_password_quality: lt_dlopen failed: (%s) %s.\n",
+ pp->pwdCheckModule, err, 0 );
+#else
+ Debug(LDAP_DEBUG_ANY,
+ "check_password_quality: lt_dlopen failed: (%s) %s.\n",
+ pp->pwdCheckModule, err, 0 );
+#endif
+ ok = LDAP_OTHER; /* internal error */
+ } else {
+ int (*prog)( char *passwd, char **text, void *arg );
+
+ if ((prog = lt_dlsym( mod, "check_password" )) == NULL) {
+ err = lt_dlerror();
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( SLAPD, CRIT,
+ "check_password_quality: lt_dlsym failed: (%s) %s.\n",
+ pp->pwdCheckModule, err, 0 );
+#else
+ Debug(LDAP_DEBUG_ANY,
+ "check_password_quality: lt_dlsym failed: (%s) %s.\n",
+ pp->pwdCheckModule, err, 0 );
+#endif
+ ok = LDAP_OTHER;
+ } else {
+ char *txt = NULL;
+
+ ldap_pvt_thread_mutex_lock( &chk_syntax_mutex );
+ ok = prog( cred->bv_val, &txt, NULL );
+ ldap_pvt_thread_mutex_unlock( &chk_syntax_mutex );
+ if (txt) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( SLAPD, CRIT,
+ "check_password_quality: module error (%s) %s[%d].\n",
+ pp->pwdCheckModule, txt, ok );
+#else
+ Debug(LDAP_DEBUG_ANY,
+ "check_password_quality: module error: (%s) %s.[%d]\n",
+ pp->pwdCheckModule, txt, ok );
+#endif
+ free(txt);
+ } else
+ ok = LDAP_SUCCESS;
+ }
+
+ lt_dlclose( mod );
+ }
+ }
+
+
+ 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;
+ int i, j;
+
+ assert (bv && (bv->bv_len > 0) && (bv->bv_val) && oldtime && oldpw );
+
+ if ( oid ) *oid = 0;
+ *oldtime = (time_t)-1;
+ oldpw->bv_val = NULL;
+ oldpw->bv_len = 0;
+
+ 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 );
+
+ return LDAP_SUCCESS;
+exit_failure:
+ if (oid && *oid) { ber_memfree(*oid); *oid = NULL; }
+ if (oldpw->bv_val) {
+ ber_memfree( oldpw->bv_val); oldpw->bv_val = NULL;
+ oldpw->bv_len = 0;
+ }
+ 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#%d#", timebuf,
+ pa->a_desc->ad_type->sat_syntax->ssyn_oid,
+ 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;
+}
+
+static int
+ppolicy_bind_resp( Operation *op, SlapReply *rs )
+{
+ slap_overinst *on = op->o_callback->sc_private;
+ PassPolicy pp;
+ int send_ctrl;
+ Modifications *mod = NULL, *m;
+ int pwExpired = 0;
+ int ngut = -1, warn = -1, age, rc, i;
+ LDAPPasswordPolicyError pErr = PP_noError;
+ Attribute *a;
+ struct tm *tm;
+ time_t now, then, pwtime = (time_t)-1;
+ const char *txt;
+ char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
+ BackendInfo *bi = op->o_bd->bd_info;
+ Entry *e;
+
+ 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;
+ }
+
+ /* Did we receive a password policy request control? */
+ for ( i=0; op->o_ctrls && op->o_ctrls[i]; i++ ) {
+ if ( !strcmp( op->o_ctrls[i]->ldctl_oid, LDAP_CONTROL_PASSWORDPOLICYREQUEST ) ) {
+ send_ctrl = 1;
+ break;
+ }
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ ppolicy_get( op, e, &pp );
+
+ if ( account_locked( op, e, &pp, &mod )) {
+ /* This will be the Draft 8 response, Unwilling is bogus */
+ rs->sr_err = LDAP_INVALID_CREDENTIALS;
+ pErr = PP_accountLocked;
+ goto done;
+ }
+
+ now = slap_get_time(); /* stored for later consideration */
+ ldap_pvt_thread_mutex_lock( &gmtime_mutex );
+ tm = gmtime(&now);
+ lutil_gentime( nowstr, sizeof(nowstr), tm );
+ ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
+
+ 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_type = ad_pwdFailureTime->ad_cname;
+ m->sml_desc = ad_pwdFailureTime;
+ m->sml_values = ch_calloc( sizeof(struct berval), 2 );
+
+ ber_str2bv( nowstr, 0, 1, &m->sml_values[0] );
+ 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 (pp.pwdFailureCountInterval == 0) {
+ fc++;
+ } else if (now <=
+ parse_time(a->a_nvals[i].bv_val) +
+ pp.pwdFailureCountInterval) {
+
+ fc++;
+ }
+ /*
+ * We only count those failures
+ * which are not due to expire.
+ */
+ }
+ }
+
+ if ((pp.pwdMaxFailure > 0) &&
+ (fc >= 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_type = ad_pwdAccountLockedTime->ad_cname;
+ m->sml_desc = ad_pwdAccountLockedTime;
+ m->sml_values = ch_calloc( sizeof(struct berval), 2 );
+ ber_str2bv( nowstr, 0, 1, &m->sml_values[0] );
+ 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_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 ( pp.pwdMustChange &&
+ (a = attr_find( e->e_attrs, ad_pwdReset )) &&
+ !strcmp( a->a_nvals[0].bv_val, "TRUE" ) ) {
+ /*
+ * 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.
+ */
+ pwcons[op->o_conn->c_conn_idx].restrict = 1;
+
+ 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.
+ */
+ if (pp.pwdMaxAge == 0) goto grace;
+
+ if (pwtime == (time_t)-1) {
+ /*
+ * Hmm. No password changed time on the
+ * entry. This is odd - it should have
+ * been provided when the attribute was added.
+ *
+ * However, it's possible that it could be
+ * missing if the DIT was established via
+ * an import process.
+ */
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ERR,
+ "ppolicy_bind: Entry %s does not have valid pwdChangedTime attribute - assuming password expired\n",
+ e->e_name.bv_val, 0, 0);
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "ppolicy_bind: Entry %s does not have valid pwdChangedTime attribute - assuming password expired\n",
+ e->e_name.bv_val, 0, 0);
+
+#endif
+ pwExpired = 1;
+ } else {
+ /*
+ * 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 > pp.pwdMaxAge ) pwExpired = 1;
+ }
+ }
+
+grace:
+ if (!pwExpired) goto check_expiring_password;
+
+ if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
+ ngut = pp.pwdGraceLoginLimit;
+ else {
+ for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
+ ngut = pp.pwdGraceLoginLimit - ngut;
+ }
+
+ /*
+ * ngut is the number of remaining grace logins
+ */
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ERR,
+ "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
+ e->e_name.bv_val, ngut, 0);
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
+ e->e_name.bv_val, ngut, 0);
+#endif
+
+ if (ngut < 1) {
+ 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_type = ad_pwdGraceUseTime->ad_cname;
+ m->sml_desc = ad_pwdGraceUseTime;
+ m->sml_values = ch_calloc( sizeof(struct berval), 2 );
+ ber_str2bv( nowstr, 0, 1, &m->sml_values[0] );
+ 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 ((pp.pwdMaxAge < 1) || (pwExpired) || (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 (pp.pwdMaxAge - age < pp.pwdExpireWarning ) {
+ /*
+ * Set the warning value, add expiration warned timestamp to the entry.
+ */
+ if ((a = attr_find( e->e_attrs, ad_pwdExpirationWarned )) == NULL) {
+ m = ch_calloc( sizeof(Modifications), 1 );
+ m->sml_op = LDAP_MOD_ADD;
+ m->sml_type = ad_pwdExpirationWarned->ad_cname;
+ m->sml_desc = ad_pwdExpirationWarned;
+ m->sml_values = ch_calloc( sizeof(struct berval), 2 );
+ ber_str2bv( nowstr, 0, 1, &m->sml_values[0] );
+ m->sml_next = mod;
+ mod = m;
+ }
+
+ warn = pp.pwdMaxAge - age; /* seconds left until expiry */
+ if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATIONS, DETAIL1,
+ "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
+ op->o_req_dn.bv_val, warn, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
+ op->o_req_dn.bv_val, warn, 0 );
+#endif
+ }
+ }
+
+done:
+ op->o_bd->bd_info = (BackendInfo *)on->on_info;
+ be_entry_release_r( op, e );
+
+ if ( mod ) {
+ Operation op2 = *op;
+ SlapReply r2 = { REP_RESULT };
+ slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
+
+ /* FIXME: Need to handle replication of some (but not all)
+ * of the operational attributes...
+ */
+ op2.o_tag = LDAP_REQ_MODIFY;
+ op2.o_callback = &cb;
+ op2.orm_modlist = mod;
+ op2.o_dn = op->o_bd->be_rootdn;
+ op2.o_ndn = op->o_bd->be_rootndn;
+ op2.o_bd->bd_info = (BackendInfo *)on->on_info;
+ rc = op->o_bd->be_modify( &op2, &r2 );
+ slap_mods_free( mod );
+ }
+
+ if ( send_ctrl ) {
+ LDAPControl **ctrls = NULL;
+
+ ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
+ ctrls[0] = create_passcontrol( warn, ngut, pErr );
+ ctrls[1] = NULL;
+ rs->sr_ctrls = ctrls;
+ }
+ 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;
+
+ /* Root bypasses policy */
+ if ( !be_isroot( op->o_bd, &op->o_req_ndn )) {
+ slap_callback *cb;
+
+ cb = sl_calloc( sizeof(slap_callback), 1, op->o_tmpmemctx );
+
+ /* Setup a callback so we can munge the result */
+
+ cb->sc_response = ppolicy_bind_resp;
+ cb->sc_next = op->o_callback->sc_next;
+ cb->sc_private = on;
+ op->o_callback->sc_next = cb;
+ }
+
+ return SLAP_CB_CONTINUE;
+}
+
+/* Reset the restrict flag for the next session on this connection */
+static int
+ppolicy_unbind( Operation *op, SlapReply *rs )
+{
+ pwcons[op->o_conn->c_conn_idx].restrict = 0;
+ 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 i, send_ctrl = 0;
+
+ /* Did we receive a password policy request control? */
+ for ( i=0; op->o_ctrls && op->o_ctrls[i]; i++ ) {
+ if ( !strcmp( op->o_ctrls[i]->ldctl_oid,
+ LDAP_CONTROL_PASSWORDPOLICYREQUEST ) ) {
+ send_ctrl = 1;
+ break;
+ }
+ }
+
+ if ( op->o_conn && pwcons[op->o_conn->c_conn_idx].restrict ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ENTRY,
+ "connection restricted to password changing only\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "connection restricted to password changing only\n", 0, 0, 0);
+#endif
+ if ( send_ctrl ) {
+ LDAPControl **ctrls = NULL;
+
+ ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
+ ctrls[0] = create_passcontrol( -1, -1, PP_changeAfterReset );
+ ctrls[1] = NULL;
+ rs->sr_ctrls = ctrls;
+ }
+ op->o_bd->bd_info = (BackendInfo *)on->on_info;
+ send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
+ "Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
+ 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;
+ PassPolicy pp;
+ int pw;
+ Attribute *pa;
+
+ if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
+ return rs->sr_err;
+
+ /* Check for password in entry */
+ if ((pa = attr_find( op->oq_add.rs_e->e_attrs, slap_schema.si_ad_userPassword ))) {
+ /*
+ * 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->oq_add.rs_e, &pp );
+ if (pp.pwdCheckQuality > 0 && !be_isroot( op->o_bd, &op->o_ndn )) {
+ struct berval *bv = &(pa->a_vals[0]);
+ int rc, i, send_ctrl = 0;
+ LDAPPasswordPolicyError pErr = PP_noError;
+
+ /* Did we receive a password policy request control? */
+ for ( i=0; op->o_ctrls && op->o_ctrls[i]; i++ ) {
+ if ( !strcmp( op->o_ctrls[i]->ldctl_oid,
+ LDAP_CONTROL_PASSWORDPOLICYREQUEST ) ) {
+ send_ctrl = 1;
+ break;
+ }
+ }
+ rc = check_password_quality( bv, &pp, &pErr );
+ if (rc != LDAP_SUCCESS) {
+ op->o_bd->bd_info = (BackendInfo *)on->on_info;
+ if ( send_ctrl ) {
+ LDAPControl **ctrls = NULL;
+
+ ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
+ ctrls[0] = create_passcontrol( -1, -1, pErr );
+ ctrls[1] = NULL;
+ rs->sr_ctrls = ctrls;
+ }
+ send_ldap_error( op, rs, rc, "Password fails quality checking policy" );
+ return rs->sr_err;
+ }
+ }
+ /* If password aging is in effect, set the pwdChangedTime */
+ if ( pp.pwdMaxAge || pp.pwdMinAge ) {
+ struct berval timestamp;
+ char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
+ struct tm *ltm;
+ time_t now = slap_get_time();
+
+ ldap_pvt_thread_mutex_lock( &gmtime_mutex );
+ ltm = gmtime( &now );
+ lutil_gentime( timebuf, sizeof(timebuf), ltm );
+ ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
+
+ timestamp.bv_val = timebuf;
+ timestamp.bv_len = strlen(timebuf);
+
+ attr_merge_one( op->ora_e, ad_pwdChangedTime, ×tamp, NULL );
+ }
+ }
+ return SLAP_CB_CONTINUE;
+}
+
+static int
+ppolicy_modify( Operation *op, SlapReply *rs )
+{
+ slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
+ int i, rc, mod_pw_only, pwmod, pwmop, deladd, hsize = 0;
+ PassPolicy pp;
+ Modifications *mods = NULL, *modtail, *ml, *delmod, *addmod;
+ Attribute *pa, *ha, *ra, at;
+ int repl_user = be_isupdate( op->o_bd, &op->o_ndn );
+ const char *txt;
+ pw_hist *tl = NULL, *p;
+ int zapReset, send_ctrl = 0;
+ Entry *e;
+ struct berval newpw = { 0, NULL }, oldpw = { 0, NULL }, *bv, cr[2];
+ LDAPPasswordPolicyError pErr = PP_noError;
+
+ 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;
+
+ /* Did we receive a password policy request control? */
+ for ( i=0; op->o_ctrls && op->o_ctrls[i]; i++ ) {
+ if ( !strcmp( op->o_ctrls[i]->ldctl_oid,
+ LDAP_CONTROL_PASSWORDPOLICYREQUEST ) ) {
+ send_ctrl = 1;
+ break;
+ }
+ }
+
+ /* 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_replog_cb &&
+ sc->sc_private ) {
+ req_pwdexop_s *qpw = sc->sc_private;
+ newpw = qpw->rs_new;
+ oldpw = qpw->rs_old;
+ break;
+ }
+ }
+ }
+
+ ppolicy_get( op, e, &pp );
+
+ for(ml = op->oq_modify.rs_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) && (ml->sml_values[0].bv_val != NULL)) {
+ deladd = 1;
+ delmod = ml;
+ }
+
+ if ((deladd == 1) && ((ml->sml_op == LDAP_MOD_ADD) ||
+ (ml->sml_op == LDAP_MOD_REPLACE)))
+ deladd = 2;
+
+ if ((ml->sml_op == LDAP_MOD_ADD) ||
+ (ml->sml_op == LDAP_MOD_REPLACE))
+ addmod = ml;
+ } else if (! 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 (pwcons[op->o_conn->c_conn_idx].restrict && !mod_pw_only) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ENTRY,
+ "connection restricted to password changing only\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "connection restricted to password changing only\n", 0, 0, 0 );
+#endif
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
+ pErr = PP_changeAfterReset;
+ goto return_results;
+ }
+
+ /*
+ * 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 don't have this, then we fail with an error. 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;
+
+ /*
+ * Did we get a valid add mod?
+ */
+
+ if (!addmod) {
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "Internal Error";
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ENTRY,
+ "cannot locate modification supplying new password\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "cannot locate modification supplying new password\n", 0, 0, 0 );
+#endif
+ goto return_results;
+ }
+
+ /*
+ * 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 (ha = attr_find( e->e_attrs, ad_pwdHistory )) {
+ struct berval oldpw;
+ time_t oldtime;
+ char *oid;
+
+ 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, hsize=0; p; p=p->next, hsize++); /* count history size */
+
+ if (be_isroot( op->o_bd, &op->o_ndn)) 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_malloc( sizeof( Modifications ) );
+ ml->sml_op = LDAP_MOD_DELETE;
+ ml->sml_desc = pp.ad;
+ ml->sml_type = pp.ad->ad_cname;
+ ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
+ ber_dupbv( &ml->sml_values[0], &oldpw );
+ ml->sml_values[1].bv_len = 0;
+ ml->sml_values[1].bv_val = NULL;
+ ml->sml_nvalues = NULL;
+ ml->sml_next = op->orm_modlist;
+ op->orm_modlist = ml;
+ delmod = ml;
+ deladd = 2;
+ }
+
+ if (pp.pwdSafeModify && deladd != 2) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ENTRY,
+ "change password must use DELETE followed by ADD/REPLACE\n",
+ 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "change password must use DELETE followed by ADD/REPLACE\n",
+ 0, 0, 0 );
+#endif
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "Must supply old password to be changed as well as new one";
+ pErr = PP_mustSupplyOldPassword;
+ goto return_results;
+ }
+
+ if (!pp.pwdAllowUserChange) {
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "User alteration of password is not allowed";
+ pErr = PP_passwordModNotAllowed;
+ goto return_results;
+ }
+
+ if (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_UNWILLING_TO_PERFORM;
+ rs->sr_text = "Password is too young to change";
+ pErr = PP_passwordTooYoung;
+ goto return_results;
+ }
+ }
+
+ if (delmod && (pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
+ /*
+ * we have a password to check
+ */
+ const char *txt;
+
+ bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
+ rc = slap_passwd_check( op->o_conn, pa, bv, &txt );
+ if (rc != LDAP_SUCCESS) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( OPERATION, ENTRY,
+ "old password check failed: %s\n", txt, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "old password check failed: %s\n", txt, 0, 0 );
+#endif
+
+ 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; delmod->sml_values[i].bv_val; i++) {
+ free(delmod->sml_values[i].bv_val);
+ delmod->sml_values[i].bv_len = 0;
+ }
+ free(delmod->sml_values);
+ delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
+ delmod->sml_values[1].bv_len = 0;
+ delmod->sml_values[1].bv_val = NULL;
+ ber_dupbv(&(delmod->sml_values[0]), &(pa->a_nvals[0]));
+ }
+ }
+
+ bv = newpw.bv_val ? &newpw : addmod->sml_values;
+ if (pp.pwdCheckQuality > 0) {
+
+ rc = check_password_quality( bv, &pp, &pErr );
+ if (rc != LDAP_SUCCESS) {
+ rs->sr_err = rc;
+ rs->sr_text = "Password fails quality checking policy";
+ goto return_results;
+ }
+ }
+
+ /*
+ * Last check - the password history.
+ */
+ if (slap_passwd_check( op->o_conn, 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;
+ }
+
+ if (pp.pwdInHistory < 1) goto do_modify;
+
+ /*
+ * 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;
+ rc = slap_passwd_check( op->o_conn, &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) && (!repl_user)) {
+ struct berval timestamp;
+ char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
+ struct tm *ltm;
+ time_t now = slap_get_time();
+ Attribute *ga;
+
+ /*
+ * keep the necessary pwd.. operational attributes
+ * up to date.
+ */
+
+ ldap_pvt_thread_mutex_lock( &gmtime_mutex );
+ ltm = gmtime( &now );
+ lutil_gentime( timebuf, sizeof(timebuf), ltm );
+ ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
+
+ timestamp.bv_val = timebuf;
+ timestamp.bv_len = strlen(timebuf);
+ mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
+ mods->sml_type.bv_val = NULL;
+ mods->sml_desc = ad_pwdChangedTime;
+ if (pwmop != LDAP_MOD_DELETE) {
+ mods->sml_op = LDAP_MOD_REPLACE;
+ mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
+ ber_dupbv( &mods->sml_values[0], ×tamp );
+ mods->sml_values[1].bv_len = 0;
+ mods->sml_values[1].bv_val = NULL;
+ assert( mods->sml_values[0].bv_val );
+ } else {
+ mods->sml_op = LDAP_MOD_DELETE;
+ mods->sml_values = NULL;
+ }
+ mods->sml_nvalues = NULL;
+ mods->sml_next = NULL;
+ modtail->sml_next = mods;
+ modtail = mods;
+
+ if (attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
+ mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
+ mods->sml_op = LDAP_MOD_DELETE;
+ mods->sml_type.bv_val = NULL;
+ mods->sml_desc = ad_pwdGraceUseTime;
+ mods->sml_values = NULL;
+ mods->sml_nvalues = NULL;
+ mods->sml_next = NULL;
+ modtail->sml_next = mods;
+ modtail = mods;
+ }
+
+ if (attr_find(e->e_attrs, ad_pwdExpirationWarned )) {
+ mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
+ mods->sml_op = LDAP_MOD_DELETE;
+ mods->sml_type.bv_val = NULL;
+ mods->sml_desc = ad_pwdExpirationWarned;
+ mods->sml_values = NULL;
+ mods->sml_nvalues = NULL;
+ 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_malloc( sizeof( Modifications ) );
+ mods->sml_op = LDAP_MOD_DELETE;
+ mods->sml_type.bv_val = NULL;
+ mods->sml_desc = ad_pwdReset;
+ mods->sml_values = NULL;
+ mods->sml_nvalues = NULL;
+ mods->sml_next = NULL;
+ modtail->sml_next = mods;
+ modtail = mods;
+ }
+
+ if (hsize >= pp.pwdInHistory) {
+ /*
+ * We use the >= operator, since we are going to add a
+ * 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_malloc( sizeof( Modifications ) );
+ mods->sml_op = LDAP_MOD_DELETE;
+ mods->sml_type.bv_val = NULL;
+ mods->sml_desc = ad_pwdHistory;
+ mods->sml_nvalues = NULL;
+ mods->sml_values = ch_calloc( sizeof( struct berval ),
+ hsize - pp.pwdInHistory + 2 );
+ mods->sml_values[ hsize - pp.pwdInHistory + 1 ].bv_val = NULL;
+ mods->sml_values[ hsize - pp.pwdInHistory + 1 ].bv_len = 0;
+ for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
+ mods->sml_values[i].bv_val = NULL;
+ mods->sml_values[i].bv_len = 0;
+ 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_type.bv_val = NULL;
+ mods->sml_desc = ad_pwdHistory;
+ mods->sml_nvalues = NULL;
+ 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 {
+#ifdef NEW_LOGGING
+ LDAP_LOG ( OPERATION, ERR,
+ "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
+#endif
+ }
+
+ /*
+ * 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 ((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.bv_val = addmod->sml_values[0].bv_val;
+ bv.bv_len = addmod->sml_values[0].bv_len;
+ /* clear and discard the clear password */
+ memset(bv.bv_val, 0, bv.bv_len);
+ ber_memfree(bv.bv_val);
+ addmod->sml_values[0].bv_val = hpw.bv_val;
+ addmod->sml_values[0].bv_len = hpw.bv_len;
+ }
+ }
+ 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 ) {
+ LDAPControl **ctrls = NULL;
+
+ ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
+ ctrls[0] = create_passcontrol( -1, -1, pErr );
+ ctrls[1] = NULL;
+ rs->sr_ctrls = ctrls;
+ }
+ send_ldap_result( op, rs );
+ return rs->sr_err;
+}
+
+static int
+ppolicy_parseCtrl(
+ Operation *op,
+ SlapReply *rs,
+ LDAPControl *ctrl )
+{
+ if ( ctrl->ldctl_value.bv_len ) {
+ rs->sr_text = "passwordPolicyRequest control value not empty";
+ return LDAP_PROTOCOL_ERROR;
+ }
+ if ( ctrl->ldctl_iscritical ) {
+ rs->sr_text = "passwordPolicyRequest control invalid criticality";
+ return LDAP_PROTOCOL_ERROR;
+ }
+
+ return LDAP_SUCCESS;
+}
+
+static int
+ppolicy_db_init(
+ BackendDB *be
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+
+ on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
+
+ if ( dtblsize && !pwcons )
+ pwcons = ch_calloc(sizeof(pw_conn), dtblsize );
+
+ return 0;
+}
+
+static int
+ppolicy_close(
+ BackendDB *be
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ pp_info *pi = on->on_bi.bi_private;
+
+ free( pwcons );
+ free( pi->def_policy.bv_val );
+ free( pi );
+
+ return 0;
+}
+
+static int
+ppolicy_config(
+ BackendDB *be,
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv
+)
+{
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ pp_info *pi = on->on_bi.bi_private;
+ struct berval dn;
+
+
+ if ( strcasecmp( argv[0], "ppolicy_default" ) == 0 ) {
+ if ( argc != 2 ) {
+ fprintf( stderr, "%s: line %d: invalid arguments in \"ppolicy_default"
+ " <policyDN>\n", fname, lineno );
+ return ( 1 );
+ }
+ ber_str2bv( argv[1], 0, 0, &dn );
+ if ( dnNormalize( 0, NULL, NULL, &dn, &pi->def_policy, NULL ) ) {
+ fprintf( stderr, "%s: line %d: policyDN is invalid\n",
+ fname, lineno );
+ return 1;
+ }
+ return 0;
+ }
+ return SLAP_CONF_UNKNOWN;
+}
+
+static char *extops[] = {
+ LDAP_EXOP_MODIFY_PASSWD,
+ NULL
+};
+
+static slap_overinst ppolicy;
+
+int ppolicy_init()
+{
+ LDAPAttributeType *at;
+ int code;
+ const char *err;
+ int i;
+
+ for (i=0; pwd_OpSchema[i].def; i++) {
+ at = ldap_str2attributetype( pwd_OpSchema[i].def, &code, &err,
+ LDAP_SCHEMA_ALLOW_ALL );
+ if ( !at ) {
+ fprintf( stderr, "AttributeType Load failed %s %s\n",
+ ldap_scherr2str(code), err );
+ return code;
+ }
+ code = at_add( at, &err );
+ if ( !code ) {
+ slap_str2ad( at->at_names[0], pwd_OpSchema[i].ad, &err );
+ }
+ ldap_memfree( at );
+ if ( code ) {
+ fprintf( stderr, "AttributeType Load failed %s %s\n",
+ scherr2str(code), err );
+ return code;
+ }
+ }
+
+ for (i=0; pwd_UsSchema[i].def; i++) {
+ code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
+ if ( code ) {
+ fprintf( stderr, "User Schema Load failed %d: %s\n", code, err );
+ return code;
+ }
+ }
+
+ code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
+ SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY, extops,
+ ppolicy_parseCtrl );
+ if ( code != LDAP_SUCCESS ) {
+ fprintf( stderr, "Failed to register control %d\n", code );
+ return code;
+ }
+
+ /* Find out our offset from GMT since mktime() always assumes
+ * its input is local time
+ */
+ {
+ time_t gmt, lcl, now = slap_get_time();
+ struct tm *tmp;
+
+ tmp = gmtime( &now );
+ gmt = mktime( tmp );
+
+ tmp = localtime( &now );
+ tmp->tm_isdst = 0;
+ lcl = mktime( tmp );
+
+ gmtoff = gmt - lcl;
+ }
+
+ 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_config = ppolicy_config;
+ ppolicy.on_bi.bi_db_close = ppolicy_close;
+
+ ppolicy.on_bi.bi_op_add = ppolicy_add;
+ ppolicy.on_bi.bi_op_bind = ppolicy_bind;
+ ppolicy.on_bi.bi_op_unbind = ppolicy_unbind;
+ ppolicy.on_bi.bi_op_compare = ppolicy_restrict;
+ ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
+ ppolicy.on_bi.bi_op_modify = ppolicy_modify;
+ ppolicy.on_bi.bi_op_search = ppolicy_restrict;
+
+ return overlay_register( &ppolicy );
+}
+
+#if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
+int init_module(int argc, char *argv[]) {
+ return ppolicy_init();
+}
+#endif
+
+#endif /* defined(SLAPD_OVER_PPOLICY) */
projects / openldap / commitdiff