diff options
Diffstat (limited to 'daemons/ipa-slapi-plugins/ipa-pwd-extop/common.c')
| -rw-r--r-- | daemons/ipa-slapi-plugins/ipa-pwd-extop/common.c | 1107 |
1 files changed, 1107 insertions, 0 deletions
diff --git a/daemons/ipa-slapi-plugins/ipa-pwd-extop/common.c b/daemons/ipa-slapi-plugins/ipa-pwd-extop/common.c new file mode 100644 index 000000000..bb1d96ade --- /dev/null +++ b/daemons/ipa-slapi-plugins/ipa-pwd-extop/common.c @@ -0,0 +1,1107 @@ +/** BEGIN COPYRIGHT BLOCK + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * Additional permission under GPLv3 section 7: + * + * In the following paragraph, "GPL" means the GNU General Public + * License, version 3 or any later version, and "Non-GPL Code" means + * code that is governed neither by the GPL nor a license + * compatible with the GPL. + * + * You may link the code of this Program with Non-GPL Code and convey + * linked combinations including the two, provided that such Non-GPL + * Code only links to the code of this Program through those well + * defined interfaces identified in the file named EXCEPTION found in + * the source code files (the "Approved Interfaces"). The files of + * Non-GPL Code may instantiate templates or use macros or inline + * functions from the Approved Interfaces without causing the resulting + * work to be covered by the GPL. Only the copyright holders of this + * Program may make changes or additions to the list of Approved + * Interfaces. + * + * Authors: + * Simo Sorce <ssorce@redhat.com> + * + * Copyright (C) 2007-2010 Red Hat, Inc. + * All rights reserved. + * END COPYRIGHT BLOCK **/ + +#include "ipapwd.h" +#include "util.h" + +/* Type of connection for this operation;*/ +#define LDAP_EXTOP_PASSMOD_CONN_SECURE + +/* Uncomment the following #undef FOR TESTING: + * allows non-SSL connections to use the password change extended op */ +/* #undef LDAP_EXTOP_PASSMOD_CONN_SECURE */ + +extern void *ipapwd_plugin_id; +extern const char *ipa_realm_dn; +extern const char *ipa_etc_config_dn; +extern const char *ipa_pwd_config_dn; + +/* These are the default enc:salt types if nothing is defined. + * TODO: retrieve the configure set of ecntypes either from the + * kfc.conf file or by synchronizing the file content into + * the directory */ +static const char *ipapwd_def_encsalts[] = { + "des3-hmac-sha1:normal", +/* "arcfour-hmac:normal", + "des-hmac-sha1:normal", + "des-cbc-md5:normal", */ + "des-cbc-crc:normal", +/* "des-cbc-crc:v4", + "des-cbc-crc:afs3", */ + NULL +}; + +static struct ipapwd_krbcfg *ipapwd_getConfig(void) +{ + krb5_error_code krberr; + struct ipapwd_krbcfg *config = NULL; + krb5_keyblock *kmkey = NULL; + Slapi_Entry *realm_entry = NULL; + Slapi_Entry *config_entry = NULL; + Slapi_Attr *a; + Slapi_Value *v; + BerElement *be = NULL; + ber_tag_t tag, tvno; + ber_int_t ttype; + const struct berval *bval; + struct berval *mkey = NULL; + char **encsalts; + char **tmparray; + char *tmpstr; + int i, ret; + + config = calloc(1, sizeof(struct ipapwd_krbcfg)); + if (!config) { + LOG_OOM(); + goto free_and_error; + } + kmkey = calloc(1, sizeof(krb5_keyblock)); + if (!kmkey) { + LOG_OOM(); + goto free_and_error; + } + config->kmkey = kmkey; + + krberr = krb5_init_context(&config->krbctx); + if (krberr) { + LOG_FATAL("krb5_init_context failed\n"); + goto free_and_error; + } + + ret = krb5_get_default_realm(config->krbctx, &config->realm); + if (ret) { + LOG_FATAL("Failed to get default realm?!\n"); + goto free_and_error; + } + + /* get the Realm Container entry */ + ret = ipapwd_getEntry(ipa_realm_dn, &realm_entry, NULL); + if (ret != LDAP_SUCCESS) { + LOG_FATAL("No realm Entry?\n"); + goto free_and_error; + } + + /*** get the Kerberos Master Key ***/ + + ret = slapi_entry_attr_find(realm_entry, "krbMKey", &a); + if (ret == -1) { + LOG_FATAL("No master key??\n"); + goto free_and_error; + } + + /* there should be only one value here */ + ret = slapi_attr_first_value(a, &v); + if (ret == -1) { + LOG_FATAL("No master key??\n"); + goto free_and_error; + } + + bval = slapi_value_get_berval(v); + if (!bval) { + LOG_FATAL("Error retrieving master key berval\n"); + goto free_and_error; + } + + be = ber_init(discard_const(bval)); + if (!be) { + LOG_FATAL("ber_init() failed!\n"); + goto free_and_error; + } + + tag = ber_scanf(be, "{i{iO}}", &tvno, &ttype, &mkey); + if (tag == LBER_ERROR) { + LOG_FATAL("Bad Master key encoding ?!\n"); + goto free_and_error; + } + + config->mkvno = tvno; + kmkey->magic = KV5M_KEYBLOCK; + kmkey->enctype = ttype; + kmkey->length = mkey->bv_len; + kmkey->contents = malloc(mkey->bv_len); + if (!kmkey->contents) { + LOG_OOM(); + goto free_and_error; + } + memcpy(kmkey->contents, mkey->bv_val, mkey->bv_len); + ber_bvfree(mkey); + ber_free(be, 1); + mkey = NULL; + be = NULL; + + /*** get the Supported Enc/Salt types ***/ + + encsalts = slapi_entry_attr_get_charray(realm_entry, + "krbSupportedEncSaltTypes"); + if (encsalts) { + for (i = 0; encsalts[i]; i++) /* count */ ; + ret = parse_bval_key_salt_tuples(config->krbctx, + (const char * const *)encsalts, i, + &config->supp_encsalts, + &config->num_supp_encsalts); + slapi_ch_array_free(encsalts); + } else { + LOG("No configured salt types use defaults\n"); + for (i = 0; ipapwd_def_encsalts[i]; i++) /* count */ ; + ret = parse_bval_key_salt_tuples(config->krbctx, + ipapwd_def_encsalts, i, + &config->supp_encsalts, + &config->num_supp_encsalts); + } + if (ret) { + LOG_FATAL("Can't get Supported EncSalt Types\n"); + goto free_and_error; + } + + /*** get the Preferred Enc/Salt types ***/ + + encsalts = slapi_entry_attr_get_charray(realm_entry, + "krbDefaultEncSaltTypes"); + if (encsalts) { + for (i = 0; encsalts[i]; i++) /* count */ ; + ret = parse_bval_key_salt_tuples(config->krbctx, + (const char * const *)encsalts, i, + &config->pref_encsalts, + &config->num_pref_encsalts); + slapi_ch_array_free(encsalts); + } else { + LOG("No configured salt types use defaults\n"); + for (i = 0; ipapwd_def_encsalts[i]; i++) /* count */ ; + ret = parse_bval_key_salt_tuples(config->krbctx, + ipapwd_def_encsalts, i, + &config->pref_encsalts, + &config->num_pref_encsalts); + } + if (ret) { + LOG_FATAL("Can't get Preferred EncSalt Types\n"); + goto free_and_error; + } + + slapi_entry_free(realm_entry); + + /* get the Realm Container entry */ + ret = ipapwd_getEntry(ipa_pwd_config_dn, &config_entry, NULL); + if (ret != LDAP_SUCCESS) { + LOG_FATAL("No config Entry? Impossible!\n"); + goto free_and_error; + } + config->passsync_mgrs = + slapi_entry_attr_get_charray(config_entry, "passSyncManagersDNs"); + /* now add Directory Manager, it is always added by default */ + tmpstr = slapi_ch_strdup("cn=Directory Manager"); + slapi_ch_array_add(&config->passsync_mgrs, tmpstr); + if (config->passsync_mgrs == NULL) { + LOG_OOM(); + goto free_and_error; + } + for (i = 0; config->passsync_mgrs[i]; i++) /* count */ ; + config->num_passsync_mgrs = i; + + slapi_entry_free(config_entry); + + /* get the ipa etc/ipaConfig entry */ + config->allow_lm_hash = false; + config->allow_nt_hash = false; + ret = ipapwd_getEntry(ipa_etc_config_dn, &config_entry, NULL); + if (ret != LDAP_SUCCESS) { + LOG_FATAL("No config Entry?\n"); + goto free_and_error; + } else { + tmparray = slapi_entry_attr_get_charray(config_entry, + "ipaConfigString"); + for (i = 0; tmparray && tmparray[i]; i++) { + if (strcasecmp(tmparray[i], "AllowLMhash") == 0) { + config->allow_lm_hash = true; + continue; + } + if (strcasecmp(tmparray[i], "AllowNThash") == 0) { + config->allow_nt_hash = true; + continue; + } + } + if (tmparray) slapi_ch_array_free(tmparray); + } + + slapi_entry_free(config_entry); + + return config; + +free_and_error: + if (mkey) ber_bvfree(mkey); + if (be) ber_free(be, 1); + if (kmkey) { + free(kmkey->contents); + free(kmkey); + } + if (config) { + if (config->krbctx) { + if (config->realm) + krb5_free_default_realm(config->krbctx, config->realm); + krb5_free_context(config->krbctx); + } + free(config->pref_encsalts); + free(config->supp_encsalts); + slapi_ch_array_free(config->passsync_mgrs); + free(config); + } + slapi_entry_free(config_entry); + slapi_entry_free(realm_entry); + return NULL; +} + +/* Easier handling for virtual attributes. You must call pwd_values_free() + * to free memory allocated here. It must be called before + * slapi_free_search_results_internal(entries) or + * slapi_pblock_destroy(pb) + */ +static int pwd_get_values(const Slapi_Entry *ent, const char *attrname, + Slapi_ValueSet** results, char** actual_type_name, + int *buffer_flags) +{ + int flags=0; + int type_name_disposition = 0; + int ret; + + ret = slapi_vattr_values_get((Slapi_Entry *)ent, (char *)attrname, + results, &type_name_disposition, + actual_type_name, flags, buffer_flags); + + return ret; +} + +static void pwd_values_free(Slapi_ValueSet** results, + char** actual_type_name, int buffer_flags) +{ + slapi_vattr_values_free(results, actual_type_name, buffer_flags); +} + +static int ipapwd_rdn_count(const char *dn) +{ + int rdnc = 0; + LDAPDN ldn; + int ret; + + ret = ldap_str2dn(dn, &ldn, LDAP_DN_FORMAT_LDAPV3); + if (ret != LDAP_SUCCESS) { + LOG_TRACE("ldap_str2dn(dn) failed ?!"); + return -1; + } + + for (rdnc = 0; ldn != NULL && ldn[rdnc]; rdnc++) /* count */ ; + ldap_dnfree(ldn); + + return rdnc; +} + +int ipapwd_getPolicy(const char *dn, + Slapi_Entry *target, + struct ipapwd_policy *policy) +{ + const char *krbPwdPolicyReference; + const char *pdn; + const Slapi_DN *psdn; + Slapi_Backend *be; + Slapi_PBlock *pb = NULL; + char *attrs[] = { "krbMaxPwdLife", "krbMinPwdLife", + "krbPwdMinDiffChars", "krbPwdMinLength", + "krbPwdHistoryLength", NULL}; + Slapi_Entry **es = NULL; + Slapi_Entry *pe = NULL; + int ret, res, dist, rdnc, scope, i; + Slapi_DN *sdn = NULL; + int buffer_flags=0; + Slapi_ValueSet* results = NULL; + char* actual_type_name = NULL; + int tmpint; + + LOG_TRACE("Searching policy for [%s]\n", dn); + + sdn = slapi_sdn_new_dn_byref(dn); + if (sdn == NULL) { + LOG_OOM(); + ret = -1; + goto done; + } + + pwd_get_values(target, "krbPwdPolicyReference", + &results, &actual_type_name, &buffer_flags); + if (results) { + Slapi_Value *sv; + slapi_valueset_first_value(results, &sv); + krbPwdPolicyReference = slapi_value_get_string(sv); + pdn = krbPwdPolicyReference; + scope = LDAP_SCOPE_BASE; + LOG_TRACE("using policy reference: %s\n", pdn); + } else { + /* Find ancestor base DN */ + be = slapi_be_select(sdn); + psdn = slapi_be_getsuffix(be, 0); + if (psdn == NULL) { + LOG_FATAL("Invalid DN [%s]\n", dn); + ret = -1; + goto done; + } + pdn = slapi_sdn_get_dn(psdn); + scope = LDAP_SCOPE_SUBTREE; + } + + pb = slapi_pblock_new(); + slapi_search_internal_set_pb(pb, + pdn, scope, + "(objectClass=krbPwdPolicy)", + attrs, 0, + NULL, /* Controls */ + NULL, /* UniqueID */ + ipapwd_plugin_id, + 0); /* Flags */ + + /* do search the tree */ + ret = slapi_search_internal_pb(pb); + slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &res); + if (ret == -1 || res != LDAP_SUCCESS) { + LOG_FATAL("Couldn't find policy, err (%d)\n", res ? res : ret); + ret = -1; + goto done; + } + + /* get entries */ + slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES, &es); + if (!es) { + LOG_TRACE("No entries ?!"); + ret = -1; + goto done; + } + + /* count entries */ + for (i = 0; es[i]; i++) /* count */ ; + + /* if there is only one, return that */ + if (i == 1) { + pe = es[0]; + goto fill; + } + + /* count number of RDNs in DN */ + rdnc = ipapwd_rdn_count(dn); + if (rdnc == -1) { + LOG_TRACE("ipapwd_rdn_count(dn) failed"); + ret = -1; + goto done; + } + + pe = NULL; + dist = -1; + + /* find closest entry */ + for (i = 0; es[i]; i++) { + const Slapi_DN *esdn; + + esdn = slapi_entry_get_sdn_const(es[i]); + if (esdn == NULL) continue; + if (0 == slapi_sdn_compare(esdn, sdn)) { + pe = es[i]; + dist = 0; + break; + } + if (slapi_sdn_issuffix(sdn, esdn)) { + const char *dn1; + int c1; + + dn1 = slapi_sdn_get_dn(esdn); + if (!dn1) continue; + c1 = ipapwd_rdn_count(dn1); + if (c1 == -1) continue; + if ((dist == -1) || + ((rdnc - c1) < dist)) { + dist = rdnc - c1; + pe = es[i]; + } + } + if (dist == 0) break; /* found closest */ + } + + if (pe == NULL) { + ret = -1; + goto done; + } + +fill: + policy->min_pwd_life = slapi_entry_attr_get_int(pe, "krbMinPwdLife"); + + tmpint = slapi_entry_attr_get_int(pe, "krbMaxPwdLife"); + if (tmpint != 0) { + policy->max_pwd_life = tmpint; + } + + tmpint = slapi_entry_attr_get_int(pe, "krbPwdMinLength"); + if (tmpint != 0) { + policy->min_pwd_length = tmpint; + } + + policy->history_length = slapi_entry_attr_get_int(pe, + "krbPwdHistoryLength"); + + policy->min_complexity = slapi_entry_attr_get_int(pe, + "krbPwdMinDiffChars"); + + ret = 0; + +done: + if (results) { + pwd_values_free(&results, &actual_type_name, buffer_flags); + } + if (pb) { + slapi_free_search_results_internal(pb); + slapi_pblock_destroy(pb); + } + if (sdn) slapi_sdn_free(&sdn); + return ret; +} + + +/*==Common-public-functions=============================================*/ + +int ipapwd_entry_checks(Slapi_PBlock *pb, struct slapi_entry *e, + int *is_root, int *is_krb, int *is_smb, int *is_ipant, + char *attr, int acc) +{ + Slapi_Value *sval; + int rc; + + /* Check ACIs */ + slapi_pblock_get(pb, SLAPI_REQUESTOR_ISROOT, is_root); + + if (!*is_root) { + /* verify this user is allowed to write a user password */ + rc = slapi_access_allowed(pb, e, attr, NULL, acc); + if (rc != LDAP_SUCCESS) { + /* we have no business here, the operation will be denied anyway */ + rc = LDAP_SUCCESS; + goto done; + } + } + + /* Check if this is a krbPrincial and therefore needs us to generate other + * hashes */ + sval = slapi_value_new_string("krbPrincipalAux"); + if (!sval) { + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + *is_krb = slapi_entry_attr_has_syntax_value(e, SLAPI_ATTR_OBJECTCLASS, sval); + slapi_value_free(&sval); + + sval = slapi_value_new_string("sambaSamAccount"); + if (!sval) { + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + *is_smb = slapi_entry_attr_has_syntax_value(e, SLAPI_ATTR_OBJECTCLASS, sval); + slapi_value_free(&sval); + + sval = slapi_value_new_string("ipaNTUserAttrs"); + if (!sval) { + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + *is_ipant = slapi_entry_attr_has_syntax_value(e, SLAPI_ATTR_OBJECTCLASS, + sval); + slapi_value_free(&sval); + + rc = LDAP_SUCCESS; + +done: + return rc; +} + +int ipapwd_gen_checks(Slapi_PBlock *pb, char **errMesg, + struct ipapwd_krbcfg **config, int check_flags) +{ + int ret, ssf; + int rc = LDAP_SUCCESS; + Slapi_Backend *be; + const Slapi_DN *psdn; + Slapi_DN *sdn; + char *dn = NULL; + + LOG_TRACE("=>\n"); + +#ifdef LDAP_EXTOP_PASSMOD_CONN_SECURE + if (check_flags & IPAPWD_CHECK_CONN_SECURE) { + /* Allow password modify on all connections with a Security Strength + * Factor (SSF) higher than 1 */ + if (slapi_pblock_get(pb, SLAPI_OPERATION_SSF, &ssf) != 0) { + LOG("Could not get SSF from connection\n"); + *errMesg = "Operation requires a secure connection.\n"; + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + + if (ssf <= 1) { + *errMesg = "Operation requires a secure connection.\n"; + rc = LDAP_CONFIDENTIALITY_REQUIRED; + goto done; + } + } +#endif + + if (check_flags & IPAPWD_CHECK_DN) { + /* check we have a valid DN in the pblock or just abort */ + ret = slapi_pblock_get(pb, SLAPI_TARGET_DN, &dn); + if (ret) { + LOG("Tried to change password for an invalid DN [%s]\n", + dn ? dn : "<NULL>"); + *errMesg = "Invalid DN"; + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + sdn = slapi_sdn_new_dn_byref(dn); + if (!sdn) { + LOG_FATAL("Unable to convert dn to sdn %s", dn ? dn : "<NULL>"); + *errMesg = "Internal Error"; + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + be = slapi_be_select(sdn); + slapi_sdn_free(&sdn); + + psdn = slapi_be_getsuffix(be, 0); + if (!psdn) { + *errMesg = "Invalid DN"; + rc = LDAP_OPERATIONS_ERROR; + goto done; + } + } + + /* get the kerberos context and master key */ + *config = ipapwd_getConfig(); + if (NULL == *config) { + LOG_FATAL("Error Retrieving Master Key"); + *errMesg = "Fatal Internal Error"; + rc = LDAP_OPERATIONS_ERROR; + } + +done: + return rc; +} + +/* check password strenght and history */ +int ipapwd_CheckPolicy(struct ipapwd_data *data) +{ + struct ipapwd_policy pol = {0}; + time_t acct_expiration; + time_t pwd_expiration; + time_t last_pwd_change; + char **pwd_history; + char *tmpstr; + int ret; + + pol.max_pwd_life = IPAPWD_DEFAULT_PWDLIFE; + pol.min_pwd_length = IPAPWD_DEFAULT_MINLEN; + + if (data->changetype != IPA_CHANGETYPE_NORMAL) { + /* We must skip policy checks (Admin change) but + * force a password change on the next login. + * But not if Directory Manager */ + if (data->changetype == IPA_CHANGETYPE_ADMIN) { + /* The expiration date needs to be older than the current time + * otherwise the KDC may not immediately register the password + * as expired. The last password change needs to match the + * password expiration otherwise minlife issues will arise. + */ + data->timeNow -= 1; + data->expireTime = data->timeNow; + } + + /* do not load policies */ + } else { + + /* find the entry with the password policy */ + ret = ipapwd_getPolicy(data->dn, data->target, &pol); + if (ret) { + LOG_TRACE("No password policy, use defaults"); + } + } + + tmpstr = slapi_entry_attr_get_charptr(data->target, + "krbPrincipalExpiration"); + acct_expiration = ipapwd_gentime_to_time_t(tmpstr); + slapi_ch_free_string(&tmpstr); + + tmpstr = slapi_entry_attr_get_charptr(data->target, + "krbPasswordExpiration"); + pwd_expiration = ipapwd_gentime_to_time_t(tmpstr); + slapi_ch_free_string(&tmpstr); + + tmpstr = slapi_entry_attr_get_charptr(data->target, + "krbLastPwdChange"); + last_pwd_change = ipapwd_gentime_to_time_t(tmpstr); + slapi_ch_free_string(&tmpstr); + + pwd_history = slapi_entry_attr_get_charray(data->target, + "passwordHistory"); + + /* check policy */ + ret = ipapwd_check_policy(&pol, data->password, + data->timeNow, + acct_expiration, + pwd_expiration, + last_pwd_change, + pwd_history); + + slapi_ch_array_free(pwd_history); + + if (data->expireTime == 0) { + data->expireTime = data->timeNow + pol.max_pwd_life; + } + + data->policy = pol; + + return ret; +} + +/* Searches the dn in directory, + * If found : fills in slapi_entry structure and returns 0 + * If NOT found : returns the search result as LDAP_NO_SUCH_OBJECT + */ +int ipapwd_getEntry(const char *dn, Slapi_Entry **e2, char **attrlist) +{ + Slapi_DN *sdn; + int search_result = 0; + + LOG_TRACE("=>\n"); + + sdn = slapi_sdn_new_dn_byref(dn); + search_result = slapi_search_internal_get_entry(sdn, attrlist, e2, + ipapwd_plugin_id); + if (search_result != LDAP_SUCCESS) { + LOG_TRACE("No such entry-(%s), err (%d)\n", dn, search_result); + } + + slapi_sdn_free(&sdn); + LOG_TRACE("<= result: %d\n", search_result); + return search_result; +} + +int ipapwd_get_cur_kvno(Slapi_Entry *target) +{ + Slapi_Attr *krbPrincipalKey = NULL; + Slapi_ValueSet *svs; + Slapi_Value *sv; + BerElement *be = NULL; + const struct berval *cbval; + ber_tag_t tag, tmp; + ber_int_t tkvno; + int hint; + int kvno; + int ret; + + /* retrieve current kvno and and keys */ + ret = slapi_entry_attr_find(target, "krbPrincipalKey", &krbPrincipalKey); + if (ret != 0) { + return 0; + } + + kvno = 0; + + slapi_attr_get_valueset(krbPrincipalKey, &svs); + hint = slapi_valueset_first_value(svs, &sv); + while (hint != -1) { + cbval = slapi_value_get_berval(sv); + if (!cbval) { + LOG_TRACE("Error retrieving berval from Slapi_Value\n"); + goto next; + } + be = ber_init(discard_const(cbval)); + if (!be) { + LOG_TRACE("ber_init() failed!\n"); + goto next; + } + + tag = ber_scanf(be, "{xxt[i]", &tmp, &tkvno); + if (tag == LBER_ERROR) { + LOG_TRACE("Bad OLD key encoding ?!\n"); + ber_free(be, 1); + goto next; + } + + if (tkvno > kvno) { + kvno = tkvno; + } + + ber_free(be, 1); +next: + hint = slapi_valueset_next_value(svs, hint, &sv); + } + + return kvno; +} + +/* Modify the Password attributes of the entry */ +int ipapwd_SetPassword(struct ipapwd_krbcfg *krbcfg, + struct ipapwd_data *data, int is_krb) +{ + int ret = 0; + Slapi_Mods *smods = NULL; + Slapi_Value **svals = NULL; + Slapi_Value **ntvals = NULL; + Slapi_Value **pwvals = NULL; + struct tm utctime; + char timestr[GENERALIZED_TIME_LENGTH+1]; + char *lm = NULL; + char *nt = NULL; + int is_smb = 0; + int is_ipant = 0; + int is_host = 0; + Slapi_Value *sambaSamAccount; + Slapi_Value *ipaNTUserAttrs; + Slapi_Value *ipaHost; + char *errMesg = NULL; + char *modtime = NULL; + + LOG_TRACE("=>\n"); + + sambaSamAccount = slapi_value_new_string("sambaSamAccount"); + if (slapi_entry_attr_has_syntax_value(data->target, + "objectClass", sambaSamAccount)) { + is_smb = 1; + } + slapi_value_free(&sambaSamAccount); + + ipaNTUserAttrs = slapi_value_new_string("ipaNTUserAttrs"); + if (slapi_entry_attr_has_syntax_value(data->target, + "objectClass", ipaNTUserAttrs)) { + is_ipant = 1; + } + slapi_value_free(&ipaNTUserAttrs); + + ipaHost = slapi_value_new_string("ipaHost"); + if (slapi_entry_attr_has_syntax_value(data->target, + "objectClass", ipaHost)) { + is_host = 1; + } + slapi_value_free(&ipaHost); + + ret = ipapwd_gen_hashes(krbcfg, data, + data->password, + is_krb, is_smb, is_ipant, + &svals, &nt, &lm, &ntvals, &errMesg); + if (ret) { + goto free_and_return; + } + + smods = slapi_mods_new(); + + if (svals) { + slapi_mods_add_mod_values(smods, LDAP_MOD_REPLACE, + "krbPrincipalKey", svals); + + /* krbLastPwdChange is used to tell whether a host entry has a + * keytab so don't set it on hosts. + */ + if (!is_host) { + /* change Last Password Change field with the current date */ + if (!gmtime_r(&(data->timeNow), &utctime)) { + LOG_FATAL("failed to retrieve current date (buggy gmtime_r ?)\n"); + ret = LDAP_OPERATIONS_ERROR; + goto free_and_return; + } + strftime(timestr, GENERALIZED_TIME_LENGTH + 1, + "%Y%m%d%H%M%SZ", &utctime); + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "krbLastPwdChange", timestr); + + /* set Password Expiration date */ + if (!gmtime_r(&(data->expireTime), &utctime)) { + LOG_FATAL("failed to convert expiration date\n"); + ret = LDAP_OPERATIONS_ERROR; + goto free_and_return; + } + strftime(timestr, GENERALIZED_TIME_LENGTH + 1, + "%Y%m%d%H%M%SZ", &utctime); + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "krbPasswordExpiration", timestr); + } + } + + if (lm && is_smb) { + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "sambaLMPassword", lm); + } + + if (nt && is_smb) { + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "sambaNTPassword", nt); + } + + if (ntvals && is_ipant) { + slapi_mods_add_mod_values(smods, LDAP_MOD_REPLACE, + "ipaNTHash", ntvals); + } + + if (is_smb) { + /* with samba integration we need to also set sambaPwdLastSet or + * samba will decide the user has to change the password again */ + if (data->changetype == IPA_CHANGETYPE_ADMIN) { + /* if it is an admin change instead we need to let know to + * samba as well that the use rmust change its password */ + modtime = slapi_ch_smprintf("0"); + } else { + modtime = slapi_ch_smprintf("%ld", (long)data->timeNow); + } + if (!modtime) { + LOG_FATAL("failed to smprintf string!\n"); + ret = LDAP_OPERATIONS_ERROR; + goto free_and_return; + } + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "sambaPwdLastset", modtime); + } + if (is_krb) { + if (data->changetype == IPA_CHANGETYPE_ADMIN) { + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "krbLoginFailedCount", "0"); + } + } + /* let DS encode the password itself, this allows also other plugins to + * intercept it to perform operations like synchronization with Active + * Directory domains through the replication plugin */ + slapi_mods_add_string(smods, LDAP_MOD_REPLACE, + "userPassword", data->password); + + /* set password history */ + if (data->policy.history_length > 0) { + pwvals = ipapwd_setPasswordHistory(smods, data); + if (pwvals) { + slapi_mods_add_mod_values(smods, LDAP_MOD_REPLACE, + "passwordHistory", pwvals); + } + } + + /* FIXME: + * instead of replace we should use a delete/add so that we are + * completely sure nobody else modified the entry meanwhile and + * fail if that's the case */ + + /* commit changes */ + ret = ipapwd_apply_mods(data->dn, smods); + + LOG_TRACE("<= result: %d\n", ret); + +free_and_return: + if (lm) slapi_ch_free((void **)&lm); + if (nt) slapi_ch_free((void **)&nt); + if (modtime) slapi_ch_free((void **)&modtime); + slapi_mods_free(&smods); + ipapwd_free_slapi_value_array(&svals); + ipapwd_free_slapi_value_array(&ntvals); + ipapwd_free_slapi_value_array(&pwvals); + + return ret; +} + + +Slapi_Value **ipapwd_setPasswordHistory(Slapi_Mods *smods, + struct ipapwd_data *data) +{ + Slapi_Value **pH = NULL; + char **pwd_history = NULL; + char **new_pwd_history = NULL; + int n = 0; + int ret; + int i; + + pwd_history = slapi_entry_attr_get_charray(data->target, + "passwordHistory"); + + ret = ipapwd_generate_new_history(data->password, data->timeNow, + data->policy.history_length, + pwd_history, &new_pwd_history, &n); + + if (ret && data->policy.history_length) { + LOG_FATAL("failed to generate new password history!\n"); + goto done; + } + + pH = (Slapi_Value **)slapi_ch_calloc(n + 1, sizeof(Slapi_Value *)); + if (!pH) { + LOG_OOM(); + goto done; + } + + for (i = 0; i < n; i++) { + pH[i] = slapi_value_new_string(new_pwd_history[i]); + if (!pH[i]) { + ipapwd_free_slapi_value_array(&pH); + LOG_OOM(); + goto done; + } + } + +done: + slapi_ch_array_free(pwd_history); + for (i = 0; i < n; i++) { + free(new_pwd_history[i]); + } + free(new_pwd_history); + return pH; +} + +/* Construct Mods pblock and perform the modify operation + * Sets result of operation in SLAPI_PLUGIN_INTOP_RESULT + */ +int ipapwd_apply_mods(const char *dn, Slapi_Mods *mods) +{ + Slapi_PBlock *pb; + int ret; + + LOG_TRACE("=>\n"); + + if (!mods || (slapi_mods_get_num_mods(mods) == 0)) { + return -1; + } + + pb = slapi_pblock_new(); + slapi_modify_internal_set_pb(pb, dn, + slapi_mods_get_ldapmods_byref(mods), + NULL, /* Controls */ + NULL, /* UniqueID */ + ipapwd_plugin_id, /* PluginID */ + 0); /* Flags */ + + ret = slapi_modify_internal_pb(pb); + if (ret) { + LOG_TRACE("WARNING: modify error %d on entry '%s'\n", ret, dn); + } else { + + slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &ret); + + if (ret != LDAP_SUCCESS){ + LOG_TRACE("WARNING: modify error %d on entry '%s'\n", ret, dn); + } else { + LOG_TRACE("<= Successful\n"); + } + } + + slapi_pblock_destroy(pb); + + return ret; +} + +int ipapwd_set_extradata(const char *dn, + const char *principal, + time_t unixtime) +{ + Slapi_Mods *smods; + Slapi_Value *va[2] = { NULL }; + struct berval bv; + char *xdata; + int xd_len; + int p_len; + int ret; + + p_len = strlen(principal); + xd_len = 2 + 4 + p_len + 1; + xdata = malloc(xd_len); + if (!xdata) { + return LDAP_OPERATIONS_ERROR; + } + + smods = slapi_mods_new(); + + /* data type id */ + xdata[0] = 0x00; + xdata[1] = 0x02; + + /* unix timestamp in Little Endian */ + xdata[2] = unixtime & 0xff; + xdata[3] = (unixtime & 0xff00) >> 8; + xdata[4] = (unixtime & 0xff0000) >> 16; + xdata[5] = (unixtime & 0xff000000) >> 24; + + /* append the principal name */ + strncpy(&xdata[6], principal, p_len); + + xdata[xd_len -1] = 0; + + bv.bv_val = xdata; + bv.bv_len = xd_len; + va[0] = slapi_value_new_berval(&bv); + + slapi_mods_add_mod_values(smods, LDAP_MOD_REPLACE, "krbExtraData", va); + + ret = ipapwd_apply_mods(dn, smods); + + slapi_value_free(&va[0]); + slapi_mods_free(&smods); + + return ret; +} + +void ipapwd_free_slapi_value_array(Slapi_Value ***svals) +{ + Slapi_Value **sv = *svals; + int i; + + if (sv) { + for (i = 0; sv[i]; i++) { + slapi_value_free(&sv[i]); + } + } + + slapi_ch_free((void **)sv); +} + +void free_ipapwd_krbcfg(struct ipapwd_krbcfg **cfg) +{ + struct ipapwd_krbcfg *c = *cfg; + + if (!c) return; + + krb5_free_default_realm(c->krbctx, c->realm); + krb5_free_context(c->krbctx); + free(c->kmkey->contents); + free(c->kmkey); + free(c->supp_encsalts); + free(c->pref_encsalts); + slapi_ch_array_free(c->passsync_mgrs); + free(c); + *cfg = NULL; +}; + |