/* * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd. * Copyright (c) 2004, Andrew Bartlett . * Copyright (c) 2004, Stefan Metzmacher * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. Neither the name of PADL Software nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "includes.h" #include "kdc.h" #include "ads.h" #include "hdb.h" #include "lib/ldb/include/ldb.h" #include "system/iconv.h" enum hdb_ldb_ent_type { HDB_LDB_ENT_TYPE_CLIENT, HDB_LDB_ENT_TYPE_SERVER, HDB_LDB_ENT_TYPE_KRBTGT, HDB_LDB_ENT_TYPE_ANY }; static const char * const krb5_attrs[] = { "objectClass", "cn", "sAMAccountName", "userPrincipalName", "servicePrincipalName", "userAccountControl", "sAMAccountType", "objectSid", "primaryGroupID", "memberOf", "unicodePWD", "lmPwdHash", "ntPwdHash", "badPwdCount", "badPasswordTime", "lastLogoff", "lastLogon", "pwdLastSet", "accountExpires", "logonCount", "objectGUID", "whenCreated", "whenChanged", "uSNCreated", "uSNChanged", "msDS-KeyVersionNumber", NULL }; static KerberosTime ldb_msg_find_krb5time_ldap_time(struct ldb_message *msg, const char *attr, KerberosTime default_val) { const char *tmp; const char *gentime; struct tm tm; gentime = ldb_msg_find_string(msg, attr, NULL); if (!gentime) return default_val; tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm); if (tmp == NULL) { return default_val; } return timegm(&tm); } static HDBFlags uf2HDBFlags(krb5_context context, int userAccountControl, enum hdb_ldb_ent_type ent_type) { HDBFlags flags = int2HDBFlags(0); krb5_warnx(context, "uf2HDBFlags: userAccountControl: %08x\n", userAccountControl); /* we don't allow kadmin deletes */ flags.immutable = 1; /* mark the principal as invalid to start with */ flags.invalid = 1; flags.renewable = 1; /* Account types - clear the invalid bit if it turns out to be valid */ if (userAccountControl & UF_NORMAL_ACCOUNT) { if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) { flags.client = 1; } flags.invalid = 0; } if (userAccountControl & UF_INTERDOMAIN_TRUST_ACCOUNT) { if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) { flags.client = 1; } flags.invalid = 0; } if (userAccountControl & UF_WORKSTATION_TRUST_ACCOUNT) { if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) { flags.client = 1; } if (ent_type == HDB_LDB_ENT_TYPE_SERVER || ent_type == HDB_LDB_ENT_TYPE_ANY) { flags.server = 1; } flags.invalid = 0; } if (userAccountControl & UF_SERVER_TRUST_ACCOUNT) { if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) { flags.client = 1; } if (ent_type == HDB_LDB_ENT_TYPE_SERVER || ent_type == HDB_LDB_ENT_TYPE_ANY) { flags.server = 1; } flags.invalid = 0; } if (userAccountControl & UF_ACCOUNTDISABLE) { flags.invalid = 1; } if (userAccountControl & UF_LOCKOUT) { flags.invalid = 1; } /* if (userAccountControl & UF_PASSWORD_NOTREQD) { flags.invalid = 1; } */ /* if (userAccountControl & UF_PASSWORD_CANT_CHANGE) { flags.invalid = 1; } */ /* if (userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED) { flags.invalid = 1; } */ if (userAccountControl & UF_TEMP_DUPLICATE_ACCOUNT) { flags.invalid = 1; } /* UF_DONT_EXPIRE_PASSWD handled in LDB_message2entry() */ /* if (userAccountControl & UF_MNS_LOGON_ACCOUNT) { flags.invalid = 1; } */ if (userAccountControl & UF_SMARTCARD_REQUIRED) { flags.require_hwauth = 1; } if (flags.server && (userAccountControl & UF_TRUSTED_FOR_DELEGATION)) { flags.forwardable = 1; flags.proxiable = 1; } else if (flags.client && (userAccountControl & UF_NOT_DELEGATED)) { flags.forwardable = 0; flags.proxiable = 0; } else { flags.forwardable = 1; flags.proxiable = 1; } /* if (userAccountControl & UF_SMARTCARD_USE_DES_KEY_ONLY) { flags.invalid = 1; } */ if (userAccountControl & UF_DONT_REQUIRE_PREAUTH) { flags.require_preauth = 0; } else { flags.require_preauth = 1; } krb5_warnx(context, "uf2HDBFlags: HDBFlags: %08x\n", HDBFlags2int(flags)); return flags; } /* * Construct an hdb_entry from a directory entry. */ static krb5_error_code LDB_message2entry(krb5_context context, HDB *db, TALLOC_CTX *mem_ctx, krb5_const_principal principal, enum hdb_ldb_ent_type ent_type, struct ldb_message *realm_msg, struct ldb_message *msg, hdb_entry *ent) { const char *unicodePwd; int userAccountControl; int i; krb5_error_code ret = 0; const char *dnsdomain = ldb_msg_find_string(realm_msg, "dnsDomain", NULL); char *realm = strupper_talloc(mem_ctx, dnsdomain); if (!realm) { krb5_set_error_string(context, "talloc_strdup: out of memory"); ret = ENOMEM; goto out; } krb5_warnx(context, "LDB_message2entry:\n"); memset(ent, 0, sizeof(*ent)); userAccountControl = ldb_msg_find_int(msg, "userAccountControl", 0); ent->principal = malloc(sizeof(*(ent->principal))); if (ent_type == HDB_LDB_ENT_TYPE_ANY && principal == NULL) { const char *samAccountName = ldb_msg_find_string(msg, "samAccountName", NULL); if (!samAccountName) { krb5_set_error_string(context, "LDB_message2entry: no samAccountName present"); ret = ENOENT; goto out; } samAccountName = ldb_msg_find_string(msg, "samAccountName", NULL); krb5_make_principal(context, &ent->principal, realm, samAccountName, NULL); } else { char *strdup_realm; ret = copy_Principal(principal, ent->principal); if (ret) { krb5_clear_error_string(context); goto out; } /* While we have copied the client principal, tests * show that Win2k3 returns the 'corrected' realm, not * the client-specified realm. This code attempts to * replace the client principal's realm with the one * we determine from our records */ /* don't leak */ free(*krb5_princ_realm(context, ent->principal)); /* this has to be with malloc() */ strdup_realm = strdup(realm); if (!strdup_realm) { ret = ENOMEM; krb5_clear_error_string(context); goto out; } krb5_princ_set_realm(context, ent->principal, &strdup_realm); } ent->kvno = ldb_msg_find_int(msg, "msDS-KeyVersionNumber", 0); ent->flags = uf2HDBFlags(context, userAccountControl, ent_type); if (ent_type == HDB_LDB_ENT_TYPE_KRBTGT) { ent->flags.invalid = 0; ent->flags.server = 1; } /* use 'whenCreated' */ ent->created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0); /* use '???' */ ent->created_by.principal = NULL; ent->modified_by = (Event *) malloc(sizeof(Event)); if (ent->modified_by == NULL) { krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; goto out; } /* use 'whenChanged' */ ent->modified_by->time = ldb_msg_find_krb5time_ldap_time(msg, "whenChanged", 0); /* use '???' */ ent->modified_by->principal = NULL; ent->valid_start = NULL; ent->valid_end = NULL; ent->pw_end = NULL; ent->max_life = NULL; ent->max_renew = NULL; ent->generation = NULL; /* create the keys and enctypes */ unicodePwd = ldb_msg_find_string(msg, "unicodePwd", NULL); if (unicodePwd) { /* Many, many thanks to lukeh@padl.com for this * algorithm, described in his Nov 10 2004 mail to * samba-technical@samba.org */ Principal *salt_principal; const char *user_principal_name = ldb_msg_find_string(msg, "userPrincipalName", NULL); struct ldb_message_element *objectclasses; struct ldb_val computer_val; computer_val.data = discard_const_p(uint8_t,"computer"); computer_val.length = strlen((const char *)computer_val.data); objectclasses = ldb_msg_find_element(msg, "objectClass"); if (objectclasses && ldb_msg_find_val(objectclasses, &computer_val)) { /* Determine a salting principal */ char *samAccountName = talloc_strdup(mem_ctx, ldb_msg_find_string(msg, "samAccountName", NULL)); char *saltbody; if (!samAccountName) { krb5_set_error_string(context, "LDB_message2entry: no samAccountName present"); ret = ENOENT; goto out; } if (samAccountName[strlen(samAccountName)-1] == '$') { samAccountName[strlen(samAccountName)-1] = '\0'; } saltbody = talloc_asprintf(mem_ctx, "%s.%s", samAccountName, dnsdomain); ret = krb5_make_principal(context, &salt_principal, realm, "host", saltbody, NULL); } else if (user_principal_name) { char *p; user_principal_name = talloc_strdup(mem_ctx, user_principal_name); if (!user_principal_name) { ret = ENOMEM; goto out; } else { p = strchr(user_principal_name, '@'); if (p) { p[0] = '\0'; } ret = krb5_make_principal(context, &salt_principal, realm, user_principal_name, NULL); } } else { const char *samAccountName = ldb_msg_find_string(msg, "samAccountName", NULL); ret = krb5_make_principal(context, &salt_principal, realm, samAccountName, NULL); } if (ret == 0) { size_t num_keys = ent->keys.len; /* * create keys from unicodePwd */ ret = hdb_generate_key_set_password(context, salt_principal, unicodePwd, &ent->keys.val, &num_keys); ent->keys.len = num_keys; krb5_free_principal(context, salt_principal); } if (ret != 0) { krb5_warnx(context, "could not generate keys from unicodePwd\n"); ent->keys.val = NULL; ent->keys.len = 0; goto out; } } else { const struct ldb_val *val; krb5_data keyvalue; val = ldb_msg_find_ldb_val(msg, "ntPwdHash"); if (!val) { krb5_warnx(context, "neither type of key available for this account\n"); ent->keys.val = NULL; ent->keys.len = 0; } else if (val->length < 16) { ent->keys.val = NULL; ent->keys.len = 0; krb5_warnx(context, "ntPwdHash has invalid length: %d\n", (int)val->length); } else { ret = krb5_data_alloc (&keyvalue, 16); if (ret) { krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; goto out; } memcpy(keyvalue.data, val->data, 16); ent->keys.val = malloc(sizeof(ent->keys.val[0])); if (ent->keys.val == NULL) { krb5_data_free(&keyvalue); krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; goto out; } memset(&ent->keys.val[0], 0, sizeof(Key)); ent->keys.val[0].key.keytype = ETYPE_ARCFOUR_HMAC_MD5; ent->keys.val[0].key.keyvalue = keyvalue; ent->keys.len = 1; } } ent->etypes = malloc(sizeof(*(ent->etypes))); if (ent->etypes == NULL) { krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; goto out; } ent->etypes->len = ent->keys.len; ent->etypes->val = calloc(ent->etypes->len, sizeof(int)); if (ent->etypes->val == NULL) { krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; goto out; } for (i=0; i < ent->etypes->len; i++) { ent->etypes->val[i] = ent->keys.val[i].key.keytype; } out: if (ret != 0) { /* I don't think this frees ent itself. */ hdb_free_entry(context, ent); } return ret; } static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_context *ldb_ctx, TALLOC_CTX *mem_ctx, krb5_const_principal principal, enum hdb_ldb_ent_type ent_type, const struct ldb_dn *realm_dn, struct ldb_message ***pmsg) { krb5_error_code ret; int count; char *filter = NULL; const char * const *princ_attrs = krb5_attrs; char *p; char *princ_str; char *princ_str_talloc; char *short_princ; char *realm_dn_str; struct ldb_message **msg = NULL; /* Structure assignment, so we don't mess with the source parameter */ struct Principal princ = *principal; /* Allow host/dns.name/realm@REALM, just convert into host/dns.name@REALM */ if (princ.name.name_string.len == 3 && StrCaseCmp(princ.name.name_string.val[2], princ.realm) == 0) { princ.name.name_string.len = 2; } ret = krb5_unparse_name(context, &princ, &princ_str); if (ret != 0) { krb5_set_error_string(context, "LDB_lookup_principal: could not parse principal"); krb5_warnx(context, "LDB_lookup_principal: could not parse principal"); return ret; } princ_str_talloc = talloc_strdup(mem_ctx, princ_str); short_princ = talloc_strdup(mem_ctx, princ_str); free(princ_str); if (!short_princ || !princ_str_talloc) { krb5_set_error_string(context, "LDB_lookup_principal: talloc_strdup() failed!"); return ENOMEM; } p = strchr(short_princ, '@'); if (p) { p[0] = '\0'; } switch (ent_type) { case HDB_LDB_ENT_TYPE_KRBTGT: filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))", KRB5_TGS_NAME); break; case HDB_LDB_ENT_TYPE_CLIENT: filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(|(samAccountName=%s)(userPrincipalName=%s)))", short_princ, princ_str_talloc); break; case HDB_LDB_ENT_TYPE_SERVER: filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(|(samAccountName=%s)(servicePrincipalName=%s)))", short_princ, short_princ); break; case HDB_LDB_ENT_TYPE_ANY: filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(|(|(samAccountName=%s)(servicePrincipalName=%s))(userPrincipalName=%s)))", short_princ, short_princ, princ_str_talloc); break; } if (!filter) { krb5_set_error_string(context, "talloc_asprintf: out of memory"); return ENOMEM; } count = ldb_search(ldb_ctx, realm_dn, LDB_SCOPE_SUBTREE, filter, princ_attrs, &msg); realm_dn_str = ldb_dn_linearize(mem_ctx, realm_dn); if (count < 1) { krb5_warnx(context, "ldb_search: basedn: '%s' filter: '%s' failed: %d", realm_dn_str, filter, count); krb5_set_error_string(context, "ldb_search: basedn: '%s' filter: '%s' failed: %d", realm_dn_str, filter, count); return HDB_ERR_NOENTRY; } else if (count > 1) { talloc_free(msg); krb5_warnx(context, "ldb_search: basedn: '%s' filter: '%s' more than 1 entry: %d", realm_dn_str, filter, count); krb5_set_error_string(context, "ldb_search: basedn: '%s' filter: '%s' more than 1 entry: %d", realm_dn_str, filter, count); return HDB_ERR_NOENTRY; } *pmsg = talloc_steal(mem_ctx, msg); return 0; } static krb5_error_code LDB_lookup_realm(krb5_context context, struct ldb_context *ldb_ctx, TALLOC_CTX *mem_ctx, const char *realm, struct ldb_message ***pmsg) { int count; struct ldb_dn *realm_dn; const char *realm_dn_str; char *cross_ref_filter; struct ldb_message **cross_ref_msg; struct ldb_message **msg; const char *cross_ref_attrs[] = { "nCName", NULL }; const char *realm_attrs[] = { "dnsDomain", "maxPwdAge", NULL }; cross_ref_filter = talloc_asprintf(mem_ctx, "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))", realm, realm); if (!cross_ref_filter) { krb5_set_error_string(context, "asprintf: out of memory"); return ENOMEM; } count = ldb_search(ldb_ctx, NULL, LDB_SCOPE_SUBTREE, cross_ref_filter, cross_ref_attrs, &cross_ref_msg); if (count < 1) { krb5_warnx(context, "ldb_search: filter: '%s' failed: %d", cross_ref_filter, count); krb5_set_error_string(context, "ldb_search: filter: '%s' failed: %d", cross_ref_filter, count); talloc_free(cross_ref_msg); return HDB_ERR_NOENTRY; } else if (count > 1) { krb5_warnx(context, "ldb_search: filter: '%s' more than 1 entry: %d", cross_ref_filter, count); krb5_set_error_string(context, "ldb_search: filter: '%s' more than 1 entry: %d", cross_ref_filter, count); talloc_free(cross_ref_msg); return HDB_ERR_NOENTRY; } realm_dn_str = ldb_msg_find_string(cross_ref_msg[0], "nCName", NULL); realm_dn = ldb_dn_explode(mem_ctx, realm_dn_str); count = ldb_search(ldb_ctx, realm_dn, LDB_SCOPE_BASE, "(objectClass=domain)", realm_attrs, &msg); if (pmsg) { *pmsg = talloc_steal(mem_ctx, msg); } else { talloc_free(msg); } if (count < 1) { krb5_warnx(context, "ldb_search: dn: %s not found: %d", realm_dn_str, count); krb5_set_error_string(context, "ldb_search: dn: %s not found: %d", realm_dn_str, count); return HDB_ERR_NOENTRY; } else if (count > 1) { krb5_warnx(context, "ldb_search: dn: '%s' more than 1 entry: %d", realm_dn_str, count); krb5_set_error_string(context, "ldb_search: dn: %s more than 1 entry: %d", realm_dn_str, count); return HDB_ERR_NOENTRY; } return 0; } static krb5_error_code LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx, TALLOC_CTX *mem_ctx, const struct ldb_dn *realm_dn, const char *alias_from, char **alias_to) { int i; int count; struct ldb_message **msg; struct ldb_message_element *spnmappings; struct ldb_dn *service_dn = ldb_dn_string_compose(mem_ctx, realm_dn, "CN=Directory Service,CN=Windows NT" ",CN=Services,CN=Configuration"); char *service_dn_str = ldb_dn_linearize(mem_ctx, service_dn); const char *directory_attrs[] = { "sPNMappings", NULL }; count = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)", directory_attrs, &msg); talloc_steal(mem_ctx, msg); if (count < 1) { krb5_warnx(context, "ldb_search: dn: %s not found: %d", service_dn_str, count); krb5_set_error_string(context, "ldb_search: dn: %s not found: %d", service_dn_str, count); return HDB_ERR_NOENTRY; } else if (count > 1) { krb5_warnx(context, "ldb_search: dn: %s found %d times!", service_dn_str, count); krb5_set_error_string(context, "ldb_search: dn: %s found %d times!", service_dn_str, count); return HDB_ERR_NOENTRY; } spnmappings = ldb_msg_find_element(msg[0], "sPNMappings"); if (!spnmappings || spnmappings->num_values == 0) { krb5_warnx(context, "ldb_search: dn: %s no sPNMappings attribute", service_dn_str); krb5_set_error_string(context, "ldb_search: dn: %s no sPNMappings attribute", service_dn_str); return HDB_ERR_NOENTRY; } for (i = 0; i < spnmappings->num_values; i++) { char *mapping, *p, *str; mapping = talloc_strdup(mem_ctx, (const char *)spnmappings->values[i].data); if (!mapping) { krb5_warnx(context, "LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping", service_dn_str); krb5_set_error_string(context, "LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping", service_dn_str); return HDB_ERR_NOENTRY; } /* C string manipulation sucks */ p = strchr(mapping, '='); if (!p) { krb5_warnx(context, "ldb_search: dn: %s sPNMapping malformed: %s", service_dn_str, mapping); krb5_set_error_string(context, "ldb_search: dn: %s sPNMapping malformed: %s", service_dn_str, mapping); return HDB_ERR_NOENTRY; } p[0] = '\0'; p++; do { str = p; p = strchr(p, ','); if (p) { p[0] = '\0'; p++; } if (strcasecmp(str, alias_from) == 0) { *alias_to = mapping; return 0; } } while (p); } krb5_warnx(context, "LDB_lookup_spn_alias: no alias for service %s applicable", alias_from); return HDB_ERR_NOENTRY; } static krb5_error_code LDB_open(krb5_context context, HDB *db, int flags, mode_t mode) { if (db->hdb_master_key_set) { krb5_warnx(context, "LDB_open: use of a master key incompatible with LDB\n"); krb5_set_error_string(context, "LDB_open: use of a master key incompatible with LDB\n"); return HDB_ERR_NOENTRY; } return 0; } static krb5_error_code LDB_close(krb5_context context, HDB *db) { return 0; } static krb5_error_code LDB_lock(krb5_context context, HDB *db, int operation) { return 0; } static krb5_error_code LDB_unlock(krb5_context context, HDB *db) { return 0; } static krb5_error_code LDB_rename(krb5_context context, HDB *db, const char *new_name) { return HDB_ERR_DB_INUSE; } static krb5_error_code LDB_fetch(krb5_context context, HDB *db, unsigned flags, krb5_const_principal principal, enum hdb_ent_type ent_type, hdb_entry *entry) { struct ldb_message **msg = NULL; struct ldb_message **realm_msg = NULL; struct ldb_message **realm_fixed_msg = NULL; enum hdb_ldb_ent_type ldb_ent_type; krb5_error_code ret; const char *realm; const struct ldb_dn *realm_dn; TALLOC_CTX *mem_ctx = talloc_named(NULL, 0, "LDB_fetch context"); if (!mem_ctx) { krb5_set_error_string(context, "LDB_fetch: talloc_named() failed!"); return ENOMEM; } realm = krb5_principal_get_realm(context, principal); ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db, mem_ctx, realm, &realm_msg); if (ret != 0) { krb5_warnx(context, "LDB_fetch: could not find realm"); talloc_free(mem_ctx); return HDB_ERR_NOENTRY; } realm_dn = realm_msg[0]->dn; /* Cludge, cludge cludge. If the realm part of krbtgt/realm, * is in our db, then direct the caller at our primary * krgtgt */ switch (ent_type) { case HDB_ENT_TYPE_SERVER: if (principal->name.name_string.len == 2 && (strcmp(principal->name.name_string.val[0], KRB5_TGS_NAME) == 0) && (LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db, mem_ctx, principal->name.name_string.val[1], &realm_fixed_msg) == 0)) { const char *dnsdomain = ldb_msg_find_string(realm_fixed_msg[0], "dnsDomain", NULL); char *realm_fixed = strupper_talloc(mem_ctx, dnsdomain); if (!realm_fixed) { krb5_set_error_string(context, "strupper_talloc: out of memory"); talloc_free(mem_ctx); return ENOMEM; } free(principal->name.name_string.val[1]); principal->name.name_string.val[1] = strdup(realm_fixed); talloc_free(realm_fixed); if (!principal->name.name_string.val[1]) { krb5_set_error_string(context, "LDB_fetch: strdup() failed!"); talloc_free(mem_ctx); return ENOMEM; } ldb_ent_type = HDB_LDB_ENT_TYPE_KRBTGT; } else { ldb_ent_type = HDB_LDB_ENT_TYPE_SERVER; } break; case HDB_ENT_TYPE_CLIENT: ldb_ent_type = HDB_LDB_ENT_TYPE_CLIENT; break; case HDB_ENT_TYPE_ANY: ldb_ent_type = HDB_LDB_ENT_TYPE_ANY; break; default: krb5_warnx(context, "LDB_fetch: invalid ent_type specified!"); talloc_free(mem_ctx); return HDB_ERR_NOENTRY; } ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db, mem_ctx, principal, ldb_ent_type, realm_dn, &msg); if (ret != 0) { char *alias_from = principal->name.name_string.val[0]; char *alias_to; Principal alias_principal; /* Try again with a servicePrincipal alias */ if (ent_type != HDB_LDB_ENT_TYPE_SERVER && ent_type != HDB_LDB_ENT_TYPE_ANY) { talloc_free(mem_ctx); return ret; } if (principal->name.name_string.len < 2) { krb5_warnx(context, "LDB_fetch: could not find principal in DB, alias not applicable"); krb5_set_error_string(context, "LDB_fetch: could not find principal in DB, alias not applicable"); talloc_free(mem_ctx); return ret; } /* Look for the list of aliases */ ret = LDB_lookup_spn_alias(context, (struct ldb_context *)db->hdb_db, mem_ctx, realm_dn, alias_from, &alias_to); if (ret != 0) { talloc_free(mem_ctx); return ret; } ret = copy_Principal(principal, &alias_principal); if (ret != 0) { krb5_warnx(context, "LDB_fetch: could not copy principal"); krb5_set_error_string(context, "LDB_fetch: could not copy principal"); talloc_free(mem_ctx); return ret; } /* ooh, very nasty playing around in the Principal... */ free(alias_principal.name.name_string.val[0]); alias_principal.name.name_string.val[0] = strdup(alias_to); if (!alias_principal.name.name_string.val[0]) { krb5_warnx(context, "LDB_fetch: strdup() failed"); krb5_set_error_string(context, "LDB_fetch: strdup() failed"); ret = ENOMEM; talloc_free(mem_ctx); free_Principal(&alias_principal); return ret; } ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db, mem_ctx, &alias_principal, ent_type, realm_dn, &msg); free_Principal(&alias_principal); if (ret != 0) { krb5_warnx(context, "LDB_fetch: could not find alias principal in DB"); krb5_set_error_string(context, "LDB_fetch: could not find alias principal in DB"); talloc_free(mem_ctx); return ret; } } if (ret == 0) { ret = LDB_message2entry(context, db, mem_ctx, principal, ldb_ent_type, realm_msg[0], msg[0], entry); if (ret != 0) { krb5_warnx(context, "LDB_fetch: message2entry failed\n"); } } talloc_free(mem_ctx); return ret; } static krb5_error_code LDB_store(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry) { return HDB_ERR_DB_INUSE; } static krb5_error_code LDB_remove(krb5_context context, HDB *db, hdb_entry *entry) { return HDB_ERR_DB_INUSE; } struct hdb_ldb_seq { struct ldb_context *ctx; int index; int count; struct ldb_message **msgs; struct ldb_message **realm_msgs; }; static krb5_error_code LDB_seq(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry) { krb5_error_code ret; struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_openp; TALLOC_CTX *mem_ctx; if (!priv) { return HDB_ERR_NOENTRY; } mem_ctx = talloc_named(priv, 0, "LDB_seq context"); if (!mem_ctx) { krb5_set_error_string(context, "LDB_seq: talloc_named() failed!"); return ENOMEM; } if (priv->index < priv->count) { ret = LDB_message2entry(context, db, mem_ctx, NULL, HDB_LDB_ENT_TYPE_ANY, priv->realm_msgs[0], priv->msgs[priv->index++], entry); } else { ret = HDB_ERR_NOENTRY; } if (ret != 0) { talloc_free(priv); db->hdb_openp = NULL; } else { talloc_free(mem_ctx); } return ret; } static krb5_error_code LDB_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry) { struct ldb_context *ldb_ctx = (struct ldb_context *)db->hdb_db; struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_openp; char *realm; struct ldb_dn *realm_dn = NULL; struct ldb_message **msgs = NULL; struct ldb_message **realm_msgs = NULL; krb5_error_code ret; TALLOC_CTX *mem_ctx; if (priv) { talloc_free(priv); db->hdb_openp = 0; } priv = (struct hdb_ldb_seq *) talloc(db, struct hdb_ldb_seq); if (!priv) { krb5_set_error_string(context, "talloc: out of memory"); return ENOMEM; } priv->ctx = ldb_ctx; priv->index = 0; priv->msgs = NULL; priv->realm_msgs = NULL; priv->count = 0; mem_ctx = talloc_named(priv, 0, "LDB_firstkey context"); if (!mem_ctx) { krb5_set_error_string(context, "LDB_firstkey: talloc_named() failed!"); return ENOMEM; } ret = krb5_get_default_realm(context, &realm); if (ret != 0) { talloc_free(priv); return ret; } ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db, mem_ctx, realm, &realm_msgs); free(realm); if (ret != 0) { talloc_free(priv); krb5_warnx(context, "LDB_firstkey: could not find realm\n"); return HDB_ERR_NOENTRY; } realm_dn = realm_msgs[0]->dn; priv->realm_msgs = talloc_steal(priv, realm_msgs); krb5_warnx(context, "LDB_firstkey: realm ok\n"); priv->count = ldb_search(ldb_ctx, realm_dn, LDB_SCOPE_SUBTREE, "(objectClass=user)", krb5_attrs, &msgs); priv->msgs = talloc_steal(priv, msgs); if (priv->count <= 0) { talloc_free(priv); return HDB_ERR_NOENTRY; } db->hdb_openp = priv; ret = LDB_seq(context, db, flags, entry); if (ret != 0) { talloc_free(priv); db->hdb_openp = NULL; } else { talloc_free(mem_ctx); } return ret; } static krb5_error_code LDB_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry *entry) { return LDB_seq(context, db, flags, entry); } static krb5_error_code LDB_destroy(krb5_context context, HDB *db) { talloc_free(db); return 0; } krb5_error_code hdb_ldb_create(TALLOC_CTX *mem_ctx, krb5_context context, struct HDB **db, const char *arg) { *db = talloc(mem_ctx, HDB); if (!*db) { krb5_set_error_string(context, "malloc: out of memory"); return ENOMEM; } (*db)->hdb_master_key_set = 0; (*db)->hdb_db = NULL; /* Setup the link to LDB */ (*db)->hdb_db = samdb_connect(db); if ((*db)->hdb_db == NULL) { krb5_warnx(context, "hdb_ldb_create: samdb_connect failed!"); krb5_set_error_string(context, "samdb_connect failed!"); talloc_free(*db); return HDB_ERR_NOENTRY; } (*db)->hdb_openp = 0; (*db)->hdb_open = LDB_open; (*db)->hdb_close = LDB_close; (*db)->hdb_fetch = LDB_fetch; (*db)->hdb_store = LDB_store; (*db)->hdb_remove = LDB_remove; (*db)->hdb_firstkey = LDB_firstkey; (*db)->hdb_nextkey = LDB_nextkey; (*db)->hdb_lock = LDB_lock; (*db)->hdb_unlock = LDB_unlock; (*db)->hdb_rename = LDB_rename; /* we don't implement these, as we are not a lockable database */ (*db)->hdb__get = NULL; (*db)->hdb__put = NULL; /* kadmin should not be used for deletes - use other tools instead */ (*db)->hdb__del = NULL; (*db)->hdb_destroy = LDB_destroy; return 0; }