we now receive and parse the main cldap netlogon reply.

we still need to parse the core of the structure
(This used to be commit 6780ae25bf7ca291f612682dec7ee7ff44c24bef)

3 files changed, 91 insertions, 15 deletions

diff --git a/source3/include/asn_1.h b/source3/include/asn_1.h
index 090c5459d1..7783ab4c2f 100644
--- a/source3/include/asn_1.h
+++ b/source3/include/asn_1.h
@@ -45,6 +45,7 @@ typedef struct {
 #define ASN1_BOOLEAN 0x1
 #define ASN1_INTEGER 0x2
 #define ASN1_ENUMERATED 0xa
+#define ASN1_SET 0x31
 
 #define ASN1_MAX_OIDS 20
 
diff --git a/source3/libsmb/asn1.c b/source3/libsmb/asn1.c
index c8f832f3df..358c23c146 100644
--- a/source3/libsmb/asn1.c
+++ b/source3/libsmb/asn1.c
@@ -254,15 +254,12 @@ BOOL asn1_start_tag(ASN1_DATA *data, uint8 tag)
 	asn1_read_uint8(data, &b);
 	if (b & 0x80) {
 		int n = b & 0x7f;
-		if (n > 2) {
-			data->has_error = True;
-			return False;
-		}
 		asn1_read_uint8(data, &b);
 		nesting->taglen = b;
-		if (n == 2) {
+		while (n > 1) {
 			asn1_read_uint8(data, &b);
 			nesting->taglen = (nesting->taglen << 8) | b;
+			n--;
 		}
 	} else {
 		nesting->taglen = b;
diff --git a/source3/utils/net_ads_cldap.c b/source3/utils/net_ads_cldap.c
index f707f6beac..77a51d3b7c 100644
--- a/source3/utils/net_ads_cldap.c
+++ b/source3/utils/net_ads_cldap.c
@@ -23,16 +23,20 @@
 
 #ifdef HAVE_ADS
 
+struct cldap_netlogon_reply {
+	uint32 i1;
+};
+
 /*
   do a cldap netlogon query
 */
-int ads_cldap_netlogon(ADS_STRUCT *ads)
+static int send_cldap_netlogon(int sock, const char *domain, 
+			       const char *hostname, unsigned ntversion)
 {
 	ASN1_DATA data;
 	char ntver[4];
-	int sock;
 
-	SIVAL(ntver, 0, 6);
+	SIVAL(ntver, 0, ntversion);
 
 	memset(&data, 0, sizeof(data));
 
@@ -49,15 +53,14 @@ int ads_cldap_netlogon(ADS_STRUCT *ads)
 
 	asn1_push_tag(&data, ASN1_CONTEXT(3));
 	asn1_write_OctetString(&data, "DnsDomain", 9);
-	asn1_write_OctetString(&data, ads->config.realm, strlen(ads->config.realm));
+	asn1_write_OctetString(&data, domain, strlen(domain));
 	asn1_pop_tag(&data);
 
 	asn1_push_tag(&data, ASN1_CONTEXT(3));
 	asn1_write_OctetString(&data, "Host", 4);
-	asn1_write_OctetString(&data, "blu", 3);
+	asn1_write_OctetString(&data, hostname, strlen(hostname));
 	asn1_pop_tag(&data);
 
-
 	asn1_push_tag(&data, ASN1_CONTEXT(3));
 	asn1_write_OctetString(&data, "NtVer", 5);
 	asn1_write_OctetString(&data, ntver, 4);
@@ -77,6 +80,75 @@ int ads_cldap_netlogon(ADS_STRUCT *ads)
 		return -1;
 	}
 
+	if (write(sock, data.data, data.length) != data.length) {
+		d_printf("failed to send cldap query (%s)\n", strerror(errno));
+	}
+
+	file_save("cldap_query.dat", data.data, data.length);
+	asn1_free(&data);
+
+	return 0;
+}
+
+
+/*
+  receive a cldap netlogon reply
+*/
+static int recv_cldap_netlogon(int sock, struct cldap_netlogon_reply *reply)
+{
+	int ret;
+	ASN1_DATA data;
+	DATA_BLOB blob;
+	DATA_BLOB os1, os2, os3;
+
+	blob = data_blob(NULL, 8192);
+
+	ret = read(sock, blob.data, blob.length);
+	if (ret <= 0) {
+		d_printf("no reply to cldap netlogon\n");
+		return -1;
+	}
+	blob.length = ret;
+
+	file_save("cldap_reply.dat", blob.data, blob.length);
+
+	asn1_load(&data, blob);
+	asn1_start_tag(&data, ASN1_SEQUENCE(0));
+	asn1_read_Integer(&data, &reply->i1);
+	asn1_start_tag(&data, ASN1_APPLICATION(4));
+	asn1_read_OctetString(&data, &os1);
+	asn1_start_tag(&data, ASN1_SEQUENCE(0));
+	asn1_start_tag(&data, ASN1_SEQUENCE(0));
+	asn1_read_OctetString(&data, &os2);
+	asn1_start_tag(&data, ASN1_SET);
+	asn1_read_OctetString(&data, &os3);
+	asn1_end_tag(&data);
+	asn1_end_tag(&data);
+	asn1_end_tag(&data);
+	asn1_end_tag(&data);
+	asn1_end_tag(&data);
+
+	file_save("cldap_reply_core.dat", os3.data, os3.length);
+	
+	data_blob_free(&os1);
+	data_blob_free(&os2);
+	data_blob_free(&os3);
+	data_blob_free(&blob);
+	
+	return 0;
+}
+
+
+/*
+  do a cldap netlogon query
+*/
+int ads_cldap_netlogon(ADS_STRUCT *ads)
+{
+	int sock;
+	int ret;
+	extern pstring global_myname;
+	struct cldap_netlogon_reply reply;
+
 	sock = open_udp_socket(inet_ntoa(ads->ldap_ip), ads->ldap_port);
 	if (sock == -1) {
 		d_printf("Failed to open udp socket to %s:%u\n", 
@@ -85,10 +157,16 @@ int ads_cldap_netlogon(ADS_STRUCT *ads)
 		return -1;
 	}
 
-	write(sock, data.data, data.length);
-	file_save("cldap_query.dat", data.data, data.length);
-	asn1_free(&data);
-	return 0;
+	ret = send_cldap_netlogon(sock, ads->config.realm, global_myname, 6);
+	if (ret != 0) {
+		return ret;
+	}
+
+	ret = recv_cldap_netlogon(sock, &reply);
+
+	close(sock);
+	
+	return ret;
 }