hdb-ldb.c

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	krb5_boolean is_computer = FALSE;
	const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg, "dnsRoot", NULL);
	char *realm = strupper_talloc(mem_ctx, dnsdomain);
	struct loadparm_context *lp_ctx = ldb_get_opaque((struct ldb_context *)db->hdb_db, "loadparm");
	struct ldb_dn *domain_dn = samdb_result_dn((struct ldb_context *)db->hdb_db,
							mem_ctx,
							realm_ref_msg,
							"nCName",
							ldb_dn_new(mem_ctx, (struct ldb_context *)db->hdb_db, NULL));

	struct hdb_ldb_private *private;
	NTTIME acct_expiry;

	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)) {
		is_computer = TRUE;
	}

	memset(entry_ex, 0, sizeof(*entry_ex));

	if (!realm) {
		krb5_set_error_string(context, "talloc_strdup: out of memory");
		ret = ENOMEM;
		goto out;
	}
			
	private = talloc(mem_ctx, struct hdb_ldb_private);
	if (!private) {
		ret = ENOMEM;
		goto out;
	}

	private->entry_ex = entry_ex;
	private->iconv_convenience = lp_iconv_convenience(lp_ctx);
	private->netbios_name = lp_netbios_name(lp_ctx);

	talloc_set_destructor(private, hdb_ldb_destrutor);

	entry_ex->ctx = private;
	entry_ex->free_entry = hdb_ldb_free_entry;

	userAccountControl = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);

	
	entry_ex->entry.principal = malloc(sizeof(*(entry_ex->entry.principal)));
	if (ent_type == HDB_LDB_ENT_TYPE_ANY && principal == NULL) {
		const char *samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
		if (!samAccountName) {
			krb5_set_error_string(context, "LDB_message2entry: no samAccountName present");
			ret = ENOENT;
			goto out;
		}
		samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
		krb5_make_principal(context, &entry_ex->entry.principal, realm, samAccountName, NULL);
	} else {
		char *strdup_realm;
		ret = copy_Principal(principal, entry_ex->entry.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 */
		
		/* this has to be with malloc() */
		strdup_realm = strdup(realm);
		if (!strdup_realm) {
			ret = ENOMEM;
			krb5_clear_error_string(context);
			goto out;
		}
		free(*krb5_princ_realm(context, entry_ex->entry.principal));
		krb5_princ_set_realm(context, entry_ex->entry.principal, &strdup_realm);
	}

	entry_ex->entry.flags = uf2HDBFlags(context, userAccountControl, ent_type);

	if (ent_type == HDB_LDB_ENT_TYPE_KRBTGT) {
		entry_ex->entry.flags.invalid = 0;
		entry_ex->entry.flags.server = 1;
		entry_ex->entry.flags.forwardable = 1;
		entry_ex->entry.flags.ok_as_delegate = 1;
	}

	if (lp_parm_bool(lp_ctx, NULL, "kdc", "require spn for service", true)) {
		if (!is_computer && !ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL)) {
			entry_ex->entry.flags.server = 0;
		}
	}

	/* use 'whenCreated' */
	entry_ex->entry.created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0);
	/* use '???' */
	entry_ex->entry.created_by.principal = NULL;

	entry_ex->entry.modified_by = (Event *) malloc(sizeof(Event));
	if (entry_ex->entry.modified_by == NULL) {
		krb5_set_error_string(context, "malloc: out of memory");
		ret = ENOMEM;
		goto out;
	}

	/* use 'whenChanged' */
	entry_ex->entry.modified_by->time = ldb_msg_find_krb5time_ldap_time(msg, "whenChanged", 0);
	/* use '???' */
	entry_ex->entry.modified_by->principal = NULL;

	entry_ex->entry.valid_start = NULL;

	acct_expiry = samdb_result_account_expires(msg);
	if (acct_expiry == 0x7FFFFFFFFFFFFFFFULL) {
		entry_ex->entry.valid_end = NULL;
	} else {
		entry_ex->entry.valid_end = malloc(sizeof(*entry_ex->entry.valid_end));
		if (entry_ex->entry.valid_end == NULL) {
			ret = ENOMEM;
			goto out;
		}
		*entry_ex->entry.valid_end = nt_time_to_unix(acct_expiry);
	}

	if (ent_type != HDB_LDB_ENT_TYPE_KRBTGT) {
		NTTIME must_change_time
			= samdb_result_force_password_change((struct ldb_context *)db->hdb_db, mem_ctx, 
							     domain_dn, msg);
		if (must_change_time == 0x7FFFFFFFFFFFFFFFULL) {
			entry_ex->entry.pw_end = NULL;
		} else {
			entry_ex->entry.pw_end = malloc(sizeof(*entry_ex->entry.pw_end));
			if (entry_ex->entry.pw_end == NULL) {
				ret = ENOMEM;
				goto out;
			}
			*entry_ex->entry.pw_end = nt_time_to_unix(must_change_time);
		}
	} else {
		entry_ex->entry.pw_end = NULL;
	}
			
	entry_ex->entry.max_life = NULL;

	entry_ex->entry.max_renew = NULL;

	entry_ex->entry.generation = NULL;

	/* Get keys from the db */
	ret = LDB_message2entry_keys(context, private->iconv_convenience, private, msg, userAccountControl, entry_ex);
	if (ret) {
		/* Could be bougus data in the entry, or out of memory */
		goto out;
	}

	entry_ex->entry.etypes = malloc(sizeof(*(entry_ex->entry.etypes)));
	if (entry_ex->entry.etypes == NULL) {
		krb5_clear_error_string(context);
		ret = ENOMEM;
		goto out;
	}
	entry_ex->entry.etypes->len = entry_ex->entry.keys.len;
	entry_ex->entry.etypes->val = calloc(entry_ex->entry.etypes->len, sizeof(int));
	if (entry_ex->entry.etypes->val == NULL) {
		krb5_clear_error_string(context);
		ret = ENOMEM;
		goto out;
	}
	for (i=0; i < entry_ex->entry.etypes->len; i++) {
		entry_ex->entry.etypes->val[i] = entry_ex->entry.keys.val[i].key.keytype;
	}


	private->msg = talloc_steal(private, msg);
	private->realm_ref_msg = talloc_steal(private, realm_ref_msg);
	private->samdb = (struct ldb_context *)db->hdb_db;
	
out:
	if (ret != 0) {
		/* This doesn't free ent itself, that is for the eventual caller to do */
		hdb_free_entry(context, entry_ex);
	} else {
		talloc_steal(db, entry_ex->ctx);
	}

	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,
					    struct ldb_dn *realm_dn,
					    struct ldb_message ***pmsg)
{
	krb5_error_code ret;
	int lret;
	char *filter = NULL;
	const char * const *princ_attrs = user_attrs;

	char *short_princ;
	char *short_princ_talloc;

	struct ldb_result *res = NULL;

	ret = krb5_unparse_name_flags(context, principal,  KRB5_PRINCIPAL_UNPARSE_NO_REALM, &short_princ);

	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;
	}

	short_princ_talloc = talloc_strdup(mem_ctx, short_princ);
	free(short_princ);
	if (!short_princ_talloc) {
		krb5_set_error_string(context, "LDB_lookup_principal: talloc_strdup() failed!");
		return ENOMEM;
	}

	switch (ent_type) {
	case HDB_LDB_ENT_TYPE_CLIENT:
		/* Can't happen */
		return EINVAL;
	case HDB_LDB_ENT_TYPE_ANY:
		/* Can't happen */
		return EINVAL;
	case HDB_LDB_ENT_TYPE_KRBTGT:
		filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))", 
					 KRB5_TGS_NAME);
		break;
	case HDB_LDB_ENT_TYPE_SERVER:
		filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))", 
					 short_princ_talloc);
		break;
	}

	if (!filter) {
		krb5_set_error_string(context, "talloc_asprintf: out of memory");
		return ENOMEM;
	}

	lret = ldb_search(ldb_ctx, realm_dn, LDB_SCOPE_SUBTREE, filter, princ_attrs, &res);

	if (lret != LDB_SUCCESS) {
		DEBUG(3, ("Failed to search for %s: %s\n", filter, ldb_errstring(ldb_ctx)));
		return HDB_ERR_NOENTRY;
	} else if (res->count == 0 || res->count > 1) {
		DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter, res->count));
		talloc_free(res);
		return HDB_ERR_NOENTRY;
	}
	talloc_steal(mem_ctx, res->msgs);
	*pmsg = res->msgs;
	talloc_free(res);
	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 ret;
	struct ldb_result *cross_ref_res;
	struct ldb_dn *partitions_basedn = samdb_partitions_dn(ldb_ctx, mem_ctx);

	ret = ldb_search_exp_fmt(ldb_ctx, mem_ctx, &cross_ref_res,
			partitions_basedn, LDB_SCOPE_SUBTREE, realm_ref_attrs,
			"(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
			realm, realm);

	if (ret != LDB_SUCCESS) {
		DEBUG(3, ("Failed to search to lookup realm(%s): %s\n", realm, ldb_errstring(ldb_ctx)));
		talloc_free(cross_ref_res);
		return HDB_ERR_NOENTRY;
	} else if (cross_ref_res->count == 0 || cross_ref_res->count > 1) {
		DEBUG(3, ("Failed find a single entry for realm %s: got %d\n", realm, cross_ref_res->count));
		talloc_free(cross_ref_res);
		return HDB_ERR_NOENTRY;
	}

	if (pmsg) {
		*pmsg = cross_ref_res->msgs;
		talloc_steal(mem_ctx, cross_ref_res->msgs);
	}
	talloc_free(cross_ref_res);

	return 0;
}


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_client(krb5_context context, HDB *db, 
					TALLOC_CTX *mem_ctx, 
					krb5_const_principal principal,
					unsigned flags,
					hdb_entry_ex *entry_ex) {
	NTSTATUS nt_status;
	char *principal_string;
	krb5_error_code ret;
	struct ldb_message **msg = NULL;
	struct ldb_message **realm_ref_msg = NULL;

	ret = krb5_unparse_name(context, principal, &principal_string);
	
	if (ret != 0) {
		return ret;
	}
	
	nt_status = sam_get_results_principal((struct ldb_context *)db->hdb_db,
					      mem_ctx, principal_string, 
					      &msg, &realm_ref_msg);
	free(principal_string);
	if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
		return HDB_ERR_NOENTRY;
	} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_MEMORY)) {
		return ENOMEM;
	} else if (!NT_STATUS_IS_OK(nt_status)) {
		return EINVAL;
	}
	
	ret = LDB_message2entry(context, db, mem_ctx, 
				principal, HDB_LDB_ENT_TYPE_CLIENT,
				msg[0], realm_ref_msg[0], entry_ex);
	return ret;
}

static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db, 
					TALLOC_CTX *mem_ctx, 
					krb5_const_principal principal,
					unsigned flags,
					hdb_entry_ex *entry_ex)
{
	krb5_error_code ret;
	struct ldb_message **msg = NULL;
	struct ldb_message **realm_ref_msg = NULL;
	struct ldb_dn *realm_dn;

	krb5_principal alloc_principal = NULL;
	if (principal->name.name_string.len != 2
	    || (strcmp(principal->name.name_string.val[0], KRB5_TGS_NAME) != 0)) {
		/* Not a krbtgt */
		return HDB_ERR_NOENTRY;
	}

	/* krbtgt case.  Either us or a trusted realm */
	if ((LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
			      mem_ctx, principal->name.name_string.val[1], &realm_ref_msg) == 0)) {
		/* us */		
 		/* Cludge, cludge cludge.  If the realm part of krbtgt/realm,
 		 * is in our db, then direct the caller at our primary
 		 * krgtgt */
 		
 		const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg[0], "dnsRoot", NULL);
 		char *realm_fixed = strupper_talloc(mem_ctx, dnsdomain);
 		if (!realm_fixed) {