r3583: - seperate the ldap client code and the ldap parsing code

  (vl: we should only sync the parsing code with trunk)

- use hierachical talloc in the ldap client code

metze
(This used to be commit 1e9c0b68ca9ddb28877d45fc1b47653b13a7446d)

1 files changed, 690 insertions, 0 deletions

diff --git a/source4/libcli/ldap/ldap_client.c b/source4/libcli/ldap/ldap_client.c
new file mode 100644
index 0000000000..7a72734c57
--- /dev/null
+++ b/source4/libcli/ldap/ldap_client.c
@@ -0,0 +1,690 @@
+/* 
+   Unix SMB/CIFS mplementation.
+   LDAP protocol helper functions for SAMBA
+   
+   Copyright (C) Andrew Tridgell  2004
+   Copyright (C) Volker Lendecke 2004
+   Copyright (C) Stefan Metzmacher 2004
+   Copyright (C) Simo Sorce 2004
+    
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   
+*/
+
+#include "includes.h"
+#include "system/network.h"
+#include "auth/auth.h"
+#include "asn_1.h"
+#include "dlinklist.h"
+
+#if 0
+static struct ldap_message *new_ldap_search_message(struct ldap_connection *conn,
+					     const char *base,
+					     enum ldap_scope scope,
+					     char *filter,
+					     int num_attributes,
+					     const char **attributes)
+{
+	struct ldap_message *res;
+
+	res = new_ldap_message(conn);
+	if (!res) {
+		return NULL;
+	}
+
+	res->type = LDAP_TAG_SearchRequest;
+	res->r.SearchRequest.basedn = base;
+	res->r.SearchRequest.scope = scope;
+	res->r.SearchRequest.deref = LDAP_DEREFERENCE_NEVER;
+	res->r.SearchRequest.timelimit = 0;
+	res->r.SearchRequest.sizelimit = 0;
+	res->r.SearchRequest.attributesonly = False;
+	res->r.SearchRequest.filter = filter;
+	res->r.SearchRequest.num_attributes = num_attributes;
+	res->r.SearchRequest.attributes = attributes;
+
+	return res;
+}
+#endif
+
+static struct ldap_message *new_ldap_simple_bind_msg(struct ldap_connection *conn, const char *dn, const char *pw)
+{
+	struct ldap_message *res;
+
+	res = new_ldap_message(conn);
+	if (!res) {
+		return NULL;
+	}
+
+	res->type = LDAP_TAG_BindRequest;
+	res->r.BindRequest.version = 3;
+	res->r.BindRequest.dn = talloc_strdup(res->mem_ctx, dn);
+	res->r.BindRequest.mechanism = LDAP_AUTH_MECH_SIMPLE;
+	res->r.BindRequest.creds.password = talloc_strdup(res->mem_ctx, pw);
+
+	return res;
+}
+
+static struct ldap_message *new_ldap_sasl_bind_msg(struct ldap_connection *conn, const char *sasl_mechanism, DATA_BLOB *secblob)
+{
+	struct ldap_message *res;
+
+	res = new_ldap_message(conn);
+	if (!res) {
+		return NULL;
+	}
+
+	res->type = LDAP_TAG_BindRequest;
+	res->r.BindRequest.version = 3;
+	res->r.BindRequest.dn = "";
+	res->r.BindRequest.mechanism = LDAP_AUTH_MECH_SASL;
+	res->r.BindRequest.creds.SASL.mechanism = talloc_strdup(res->mem_ctx, sasl_mechanism);
+	res->r.BindRequest.creds.SASL.secblob = *secblob;
+
+	return res;
+}
+
+static struct ldap_connection *new_ldap_connection(TALLOC_CTX *mem_ctx)
+{
+	struct ldap_connection *result;
+
+	result = talloc_p(mem_ctx, struct ldap_connection);
+
+	if (!result) {
+		return NULL;
+	}
+
+	result->mem_ctx = result;
+	result->next_msgid = 1;
+	result->outstanding = NULL;
+	result->searchid = 0;
+	result->search_entries = NULL;
+	result->auth_dn = NULL;
+	result->simple_pw = NULL;
+	result->gensec = NULL;
+
+	return result;
+}
+
+struct ldap_connection *ldap_connect(TALLOC_CTX *mem_ctx, const char *url)
+{
+	struct hostent *hp;
+	struct ipv4_addr ip;
+	struct ldap_connection *conn;
+	BOOL ret;
+
+	conn = new_ldap_connection(mem_ctx);
+	if (!conn) {
+		return NULL;
+	}
+
+	ret = ldap_parse_basic_url(conn->mem_ctx, url, &conn->host,
+				  &conn->port, &conn->ldaps);
+	if (!ret) {
+		talloc_free(conn);
+		return NULL;
+	}
+
+	hp = sys_gethostbyname(conn->host);
+	if (!hp || !hp->h_addr) {
+		talloc_free(conn);
+		return NULL;
+	}
+
+	putip((char *)&ip, (char *)hp->h_addr);
+
+	conn->sock = open_socket_out(SOCK_STREAM, &ip, conn->port, LDAP_CONNECTION_TIMEOUT);
+	if (conn->sock < 0) {
+		talloc_free(conn);
+		return NULL;
+	}
+
+	return conn;
+}
+
+struct ldap_message *new_ldap_message(TALLOC_CTX *mem_ctx)
+{
+	struct ldap_message *result;
+
+	result = talloc_p(mem_ctx, struct ldap_message);
+
+	if (!result) {
+		return NULL;
+	}
+
+	result->mem_ctx = result;
+
+	return result;
+}
+
+BOOL ldap_send_msg(struct ldap_connection *conn, struct ldap_message *msg,
+		   const struct timeval *endtime)
+{
+	DATA_BLOB request;
+	BOOL result;
+	struct ldap_queue_entry *entry;
+
+	msg->messageid = conn->next_msgid++;
+
+	if (!ldap_encode(msg, &request))
+		return False;
+
+	result = (write_data_until(conn->sock, request.data, request.length,
+				   endtime) == request.length);
+
+	data_blob_free(&request);
+
+	if (!result)
+		return result;
+
+	/* abandon and unbind don't expect results */
+
+	if ((msg->type == LDAP_TAG_AbandonRequest) ||
+	    (msg->type == LDAP_TAG_UnbindRequest))
+		return True;
+
+	entry = malloc(sizeof(*entry));	
+
+	if (entry == NULL)
+		return False;
+
+	entry->msgid = msg->messageid;
+	entry->msg = NULL;
+	DLIST_ADD(conn->outstanding, entry);
+
+	return True;
+}
+
+BOOL ldap_receive_msg(struct ldap_connection *conn, struct ldap_message *msg,
+		      const struct timeval *endtime)
+{
+        struct asn1_data data;
+        BOOL result;
+
+        if (!asn1_read_sequence_until(conn->sock, &data, endtime))
+                return False;
+
+        result = ldap_decode(&data, msg);
+
+        asn1_free(&data);
+        return result;
+}
+
+static struct ldap_message *recv_from_queue(struct ldap_connection *conn,
+					    int msgid)
+{
+	struct ldap_queue_entry *e;
+
+	for (e = conn->outstanding; e != NULL; e = e->next) {
+
+		if (e->msgid == msgid) {
+			struct ldap_message *result = e->msg;
+			DLIST_REMOVE(conn->outstanding, e);
+			SAFE_FREE(e);
+			return result;
+		}
+	}
+
+	return NULL;
+}
+
+static void add_search_entry(struct ldap_connection *conn,
+			     struct ldap_message *msg)
+{
+	struct ldap_queue_entry *e = malloc(sizeof *e);
+
+	if (e == NULL)
+		return;
+
+	e->msg = msg;
+	DLIST_ADD_END(conn->search_entries, e, struct ldap_queue_entry *);
+	return;
+}
+
+static void fill_outstanding_request(struct ldap_connection *conn,
+				     struct ldap_message *msg)
+{
+	struct ldap_queue_entry *e;
+
+	for (e = conn->outstanding; e != NULL; e = e->next) {
+		if (e->msgid == msg->messageid) {
+			e->msg = msg;
+			return;
+		}
+	}
+
+	/* This reply has not been expected, destroy the incoming msg */
+	talloc_free(msg);
+	return;
+}
+
+struct ldap_message *ldap_receive(struct ldap_connection *conn, int msgid,
+				  const struct timeval *endtime)
+{
+	struct ldap_message *result = recv_from_queue(conn, msgid);
+
+	if (result != NULL)
+		return result;
+
+	while (True) {
+		struct asn1_data data;
+		BOOL res;
+
+		result = new_ldap_message(conn);
+
+		if (!asn1_read_sequence_until(conn->sock, &data, endtime))
+			return NULL;
+
+		res = ldap_decode(&data, result);
+		asn1_free(&data);
+
+		if (!res)
+			return NULL;
+
+		if (result->messageid == msgid)
+			return result;
+
+		if (result->type == LDAP_TAG_SearchResultEntry) {
+			add_search_entry(conn, result);
+		} else {
+			fill_outstanding_request(conn, result);
+		}
+	}
+
+	return NULL;
+}
+
+struct ldap_message *ldap_transaction(struct ldap_connection *conn,
+				      struct ldap_message *request)
+{
+	if (!ldap_send_msg(conn, request, NULL))
+		return False;
+
+	return ldap_receive(conn, request->messageid, NULL);
+}
+
+int ldap_bind_simple(struct ldap_connection *conn, const char *userdn, const char *password)
+{
+	struct ldap_message *response;
+	struct ldap_message *msg;
+	const char *dn, *pw;
+	int result = LDAP_OTHER;
+
+	if (conn == NULL)
+		return result;
+
+	if (userdn) {
+		dn = userdn;
+	} else {
+		if (conn->auth_dn) {
+			dn = conn->auth_dn;
+		} else {
+			dn = "";
+		}
+	}
+
+	if (password) {
+		pw = password;
+	} else {
+		if (conn->simple_pw) {
+			pw = conn->simple_pw;
+		} else {
+			pw = "";
+		}
+	}
+
+	msg =  new_ldap_simple_bind_msg(conn, dn, pw);
+	if (!msg)
+		return result;
+
+	response = ldap_transaction(conn, msg);
+	if (!response) {
+		talloc_free(msg);
+		return result;
+	}
+		
+	result = response->r.BindResponse.response.resultcode;
+
+	talloc_free(msg);
+	talloc_free(response);
+
+	return result;
+}
+
+int ldap_bind_sasl(struct ldap_connection *conn, const char *username, const char *domain, const char *password)
+{
+	NTSTATUS status;
+	TALLOC_CTX *mem_ctx = NULL;
+	struct ldap_message *response;
+	struct ldap_message *msg;
+	DATA_BLOB input = data_blob(NULL, 0);
+	DATA_BLOB output = data_blob(NULL, 0);
+	int result = LDAP_OTHER;
+
+	if (conn == NULL)
+		return result;
+
+	status = gensec_client_start(conn, &conn->gensec);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to start GENSEC engine (%s)\n", nt_errstr(status)));
+		return result;
+	}
+
+	gensec_want_feature(conn->gensec, GENSEC_WANT_SIGN | GENSEC_WANT_SEAL);
+
+	status = gensec_set_domain(conn->gensec, domain);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Failed to start set GENSEC client domain to %s: %s\n", 
+			  domain, nt_errstr(status)));
+		goto done;
+	}
+
+	status = gensec_set_username(conn->gensec, username);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Failed to start set GENSEC client username to %s: %s\n", 
+			  username, nt_errstr(status)));
+		goto done;
+	}
+
+	status = gensec_set_password(conn->gensec, password);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Failed to start set GENSEC client password: %s\n", 
+			  nt_errstr(status)));
+		goto done;
+	}
+
+	status = gensec_set_target_hostname(conn->gensec, conn->host);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Failed to start set GENSEC target hostname: %s\n", 
+			  nt_errstr(status)));
+		goto done;
+	}
+
+	status = gensec_start_mech_by_sasl_name(conn->gensec, "GSS-SPNEGO");
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Failed to start set GENSEC client SPNEGO mechanism: %s\n",
+			  nt_errstr(status)));
+		goto done;
+	}
+
+	mem_ctx = talloc_init("ldap_bind_sasl");
+	if (!mem_ctx)
+		goto done;
+
+	status = gensec_update(conn->gensec, mem_ctx,
+			       input,
+			       &output);
+
+	while(1) {
+		if (NT_STATUS_IS_OK(status) && output.length == 0) {
+			break;
+		}
+		if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(status)) {
+			break;
+		}
+
+		msg =  new_ldap_sasl_bind_msg(conn, "GSS-SPNEGO", &output);
+		if (!msg)
+			goto done;
+
+		response = ldap_transaction(conn, msg);
+		talloc_free(msg);
+
+		if (!response) {
+			goto done;
+		}
+
+		result = response->r.BindResponse.response.resultcode;
+
+		if (result != LDAP_SUCCESS && result != LDAP_SASL_BIND_IN_PROGRESS) {
+			break;
+		}
+
+		status = gensec_update(conn->gensec, mem_ctx,
+				       response->r.BindResponse.SASL.secblob,
+				       &output);
+
+		talloc_free(response);
+	}
+
+done:
+	if (mem_ctx)
+		talloc_destroy(mem_ctx);
+
+	return result;
+}
+
+struct ldap_connection *ldap_setup_connection(TALLOC_CTX *mem_ctx, const char *url, 
+						const char *userdn, const char *password)
+{
+	struct ldap_connection *conn;
+	int result;
+
+	conn =ldap_connect(mem_ctx, url);
+	if (!conn) {
+		return NULL;
+	}
+
+	result = ldap_bind_simple(conn, userdn, password);
+	if (result != LDAP_SUCCESS) {
+		talloc_free(conn);
+		return NULL;
+	}
+
+	return conn;
+}
+
+struct ldap_connection *ldap_setup_connection_with_sasl(TALLOC_CTX *mem_ctx, const char *url,
+							const char *username, const char *domain, const char *password)
+{
+	struct ldap_connection *conn;
+	int result;
+
+	conn =ldap_connect(mem_ctx, url);
+	if (!conn) {
+		return NULL;
+	}
+
+	result = ldap_bind_sasl(conn, username, domain, password);
+	if (result != LDAP_SUCCESS) {
+		talloc_free(conn);
+		return NULL;
+	}
+
+	return conn;
+}
+
+BOOL ldap_abandon_message(struct ldap_connection *conn, int msgid,
+				 const struct timeval *endtime)
+{
+	struct ldap_message *msg = new_ldap_message(conn);
+	BOOL result;
+
+	if (msg == NULL)
+		return False;
+
+	msg->type = LDAP_TAG_AbandonRequest;
+	msg->r.AbandonRequest.messageid = msgid;
+
+	result = ldap_send_msg(conn, msg, endtime);
+	talloc_free(msg);
+	return result;
+}
+
+BOOL ldap_setsearchent(struct ldap_connection *conn, struct ldap_message *msg,
+		       const struct timeval *endtime)
+{
+	if ((conn->searchid != 0) &&
+	    (!ldap_abandon_message(conn, conn->searchid, endtime)))
+		return False;
+
+	conn->searchid = conn->next_msgid;
+	return ldap_send_msg(conn, msg, endtime);
+}
+
+struct ldap_message *ldap_getsearchent(struct ldap_connection *conn,
+				       const struct timeval *endtime)
+{
+	struct ldap_message *result;
+
+	if (conn->search_entries != NULL) {
+		struct ldap_queue_entry *e = conn->search_entries;
+
+		result = e->msg;
+		DLIST_REMOVE(conn->search_entries, e);
+		SAFE_FREE(e);
+		return result;
+	}
+
+	result = ldap_receive(conn, conn->searchid, endtime);
+	if (!result) {
+		return NULL;
+	}
+
+	if (result->type == LDAP_TAG_SearchResultEntry)
+		return result;
+
+	if (result->type == LDAP_TAG_SearchResultDone) {
+		/* TODO: Handle Paged Results */
+		talloc_free(result);
+		return NULL;
+	}
+
+	/* TODO: Handle Search References here */
+	return NULL;
+}
+
+void ldap_endsearchent(struct ldap_connection *conn,
+		       const struct timeval *endtime)
+{
+	struct ldap_queue_entry *e;
+
+	e = conn->search_entries;
+
+	while (e != NULL) {
+		struct ldap_queue_entry *next = e->next;
+		DLIST_REMOVE(conn->search_entries, e);
+		SAFE_FREE(e);
+		e = next;
+	}
+}
+
+struct ldap_message *ldap_searchone(struct ldap_connection *conn,
+				    struct ldap_message *msg,
+				    const struct timeval *endtime)
+{
+	struct ldap_message *res1, *res2 = NULL;
+	if (!ldap_setsearchent(conn, msg, endtime))
+		return NULL;
+
+	res1 = ldap_getsearchent(conn, endtime);
+
+	if (res1 != NULL)
+		res2 = ldap_getsearchent(conn, endtime);
+
+	ldap_endsearchent(conn, endtime);
+
+	if (res1 == NULL)
+		return NULL;
+
+	if (res2 != NULL) {
+		/* More than one entry */
+		talloc_free(res1);
+		talloc_free(res2);
+		return NULL;
+	}
+
+	return res1;
+}
+
+BOOL ldap_find_single_value(struct ldap_message *msg, const char *attr,
+			    DATA_BLOB *value)
+{
+	int i;
+	struct ldap_SearchResEntry *r = &msg->r.SearchResultEntry;
+
+	if (msg->type != LDAP_TAG_SearchResultEntry)
+		return False;
+
+	for (i=0; i<r->num_attributes; i++) {
+		if (strequal(attr, r->attributes[i].name)) {
+			if (r->attributes[i].num_values != 1)
+				return False;
+
+			*value = r->attributes[i].values[0];
+			return True;
+		}
+	}
+	return False;
+}
+
+BOOL ldap_find_single_string(struct ldap_message *msg, const char *attr,
+			     TALLOC_CTX *mem_ctx, char **value)
+{
+	DATA_BLOB blob;
+
+	if (!ldap_find_single_value(msg, attr, &blob))
+		return False;
+
+	*value = talloc(mem_ctx, blob.length+1);
+
+	if (*value == NULL)
+		return False;
+
+	memcpy(*value, blob.data, blob.length);
+	(*value)[blob.length] = '\0';
+	return True;
+}
+
+BOOL ldap_find_single_int(struct ldap_message *msg, const char *attr,
+			  int *value)
+{
+	DATA_BLOB blob;
+	char *val;
+	int errno_save;
+	BOOL res;
+
+	if (!ldap_find_single_value(msg, attr, &blob))
+		return False;
+
+	val = malloc(blob.length+1);
+	if (val == NULL)
+		return False;
+
+	memcpy(val, blob.data, blob.length);
+	val[blob.length] = '\0';
+
+	errno_save = errno;
+	errno = 0;
+
+	*value = strtol(val, NULL, 10);
+
+	res = (errno == 0);
+
+	free(val);
+	errno = errno_save;
+
+	return res;
+}
+
+int ldap_error(struct ldap_connection *conn)
+{
+	return 0;
+}
+
+NTSTATUS ldap2nterror(int ldaperror)
+{
+	return NT_STATUS_OK;
+}