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wireshark/epan/dissectors/packet-ldap.c
Richard Sharpe 3e92ea7c1f Change the way we handle realloc so that we now compute all the space required 
up front and realloc once ...

This will probably be the last changes I make on this dissector, as I want to
concentrate on using asn2eth for LDAP, as time permits.


svn path=/trunk/; revision=16619
2005-11-28 17:32:30 +00:00

3366 lines
104 KiB
C
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/* packet-ldap.c
* Routines for ldap packet dissection
*
* See RFC 1777 (LDAP v2), RFC 2251 (LDAP v3), and RFC 2222 (SASL).
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* This is not a complete implementation. It doesn't handle the full version 3, more specifically,
* it handles only the commands of version 2, but any additional characteristics of the ver3 command are supported.
*
* There should probably be alot more error checking, I simply assume that if we have a full packet, it will be a complete
* and correct packet.
*
* AFAIK, it will handle all messages used by the OpenLDAP 1.2.9 server and libraries which was my goal. I do plan to add
* the remaining commands as time permits but this is not a priority to me. Send me an email if you need it and I'll see what
* I can do.
*
* Doug Nazar
* nazard@dragoninc.on.ca
*/
/*
* 11/11/2002 - Fixed problem when decoding LDAP with desegmentation enabled and the
* ASN.1 BER Universal Class Tag: "Sequence Of" header is encapsulated across 2
* TCP segments.
*
* Ronald W. Henderson
* ronald.henderson@cognicaseusa.com
*/
/*
* 20-JAN-2004 - added decoding of MS-CLDAP netlogon RPC
* using information from the SNIA 2003 conference paper :
* Active Directory Domain Controller Location Service
* by Anthony Liguori
* ronnie sahlberg
*/
/*
* 17-DEC-2004 - added basic decoding for LDAP Controls
* 20-DEC-2004 - added handling for GSS-API encrypted blobs
*
* Stefan Metzmacher <metze@samba.org>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/asn1.h>
#include <epan/prefs.h>
#include <epan/conversation.h>
#include "packet-frame.h"
#include <epan/tap.h>
#include "packet-ber.h"
#include "packet-ldap.h"
#include <epan/emem.h>
static int proto_ldap = -1;
static int proto_cldap = -1;
static int hf_ldap_response_to = -1;
static int hf_ldap_response_in = -1;
static int hf_ldap_time = -1;
static int hf_ldap_sasl_buffer_length = -1;
static int hf_ldap_length = -1;
static int hf_ldap_message_id = -1;
static int hf_ldap_message_type = -1;
static int hf_ldap_message_length = -1;
static int hf_ldap_message_result = -1;
static int hf_ldap_message_result_matcheddn = -1;
static int hf_ldap_message_result_errormsg = -1;
static int hf_ldap_message_result_referral = -1;
static int hf_ldap_message_bind_version = -1;
static int hf_ldap_message_bind_dn = -1;
static int hf_ldap_message_bind_auth = -1;
static int hf_ldap_message_bind_auth_password = -1;
static int hf_ldap_message_bind_auth_mechanism = -1;
static int hf_ldap_message_bind_auth_credentials = -1;
static int hf_ldap_message_bind_server_credentials = -1;
static int hf_ldap_message_search_base = -1;
static int hf_ldap_message_search_scope = -1;
static int hf_ldap_message_search_deref = -1;
static int hf_ldap_message_search_sizeLimit = -1;
static int hf_ldap_message_search_timeLimit = -1;
static int hf_ldap_message_search_typesOnly = -1;
static int hf_ldap_message_search_filter = -1;
static int hf_ldap_message_search_reference = -1;
static int hf_ldap_message_dn = -1;
static int hf_ldap_message_attribute = -1;
static int hf_ldap_message_value = -1;
static int hf_ldap_message_modrdn_name = -1;
static int hf_ldap_message_modrdn_delete = -1;
static int hf_ldap_message_modrdn_superior = -1;
static int hf_ldap_message_compare = -1;
static int hf_ldap_message_modify_add = -1;
static int hf_ldap_message_modify_replace = -1;
static int hf_ldap_message_modify_delete = -1;
static int hf_ldap_message_abandon_msgid = -1;
static int hf_ldap_message_controls_oid = -1;
static int hf_ldap_message_controls_critical = -1;
static int hf_ldap_message_controls_value = -1;
static int hf_mscldap_netlogon_type = -1;
static int hf_mscldap_netlogon_flags = -1;
static int hf_mscldap_netlogon_flags_pdc = -1;
static int hf_mscldap_netlogon_flags_gc = -1;
static int hf_mscldap_netlogon_flags_ldap = -1;
static int hf_mscldap_netlogon_flags_ds = -1;
static int hf_mscldap_netlogon_flags_kdc = -1;
static int hf_mscldap_netlogon_flags_timeserv = -1;
static int hf_mscldap_netlogon_flags_closest = -1;
static int hf_mscldap_netlogon_flags_writable = -1;
static int hf_mscldap_netlogon_flags_good_timeserv = -1;
static int hf_mscldap_netlogon_flags_ndnc = -1;
static int hf_mscldap_domain_guid = -1;
static int hf_mscldap_forest = -1;
static int hf_mscldap_domain = -1;
static int hf_mscldap_hostname = -1;
static int hf_mscldap_nb_domain = -1;
static int hf_mscldap_nb_hostname = -1;
static int hf_mscldap_username = -1;
static int hf_mscldap_sitename = -1;
static int hf_mscldap_clientsitename = -1;
static int hf_mscldap_netlogon_version = -1;
static int hf_mscldap_netlogon_lm_token = -1;
static int hf_mscldap_netlogon_nt_token = -1;
static gint ett_ldap = -1;
static gint ett_ldap_msg = -1;
static gint ett_ldap_payload = -1;
static gint ett_ldap_sasl_blob = -1;
static gint ett_ldap_referrals = -1;
static gint ett_ldap_attribute = -1;
static gint ett_ldap_controls = -1;
static gint ett_ldap_control = -1;
static gint ett_mscldap_netlogon_flags = -1;
static int ldap_tap = -1;
/* desegmentation of LDAP */
static gboolean ldap_desegment = TRUE;
#define TCP_PORT_LDAP 389
#define UDP_PORT_CLDAP 389
#define TCP_PORT_GLOBALCAT_LDAP 3268 /* Windows 2000 Global Catalog */
static dissector_handle_t gssapi_handle;
static dissector_handle_t gssapi_wrap_handle;
/* different types of rpc calls ontop of ms cldap */
#define MSCLDAP_RPC_NETLOGON 1
/*
* Data structure attached to a conversation, giving authentication
* information from a bind request.
* We keep a linked list of them, so that we can free up all the
* authentication mechanism strings.
*/
typedef struct ldap_conv_info_t {
struct ldap_conv_info_t *next;
guint auth_type; /* authentication type */
char *auth_mech; /* authentication mechanism */
guint32 first_auth_frame; /* first frame that would use a security layer */
GHashTable *unmatched;
GHashTable *matched;
} ldap_conv_info_t;
static ldap_conv_info_t *ldap_info_items;
static guint
ldap_info_hash_matched(gconstpointer k)
{
const ldap_call_response_t *key = k;
return key->messageId;
}
static gint
ldap_info_equal_matched(gconstpointer k1, gconstpointer k2)
{
const ldap_call_response_t *key1 = k1;
const ldap_call_response_t *key2 = k2;
if( key1->req_frame && key2->req_frame && (key1->req_frame!=key2->req_frame) ){
return 0;
}
if( key1->rep_frame && key2->rep_frame && (key1->rep_frame!=key2->rep_frame) ){
return 0;
}
return key1->messageId==key2->messageId;
}
static guint
ldap_info_hash_unmatched(gconstpointer k)
{
const ldap_call_response_t *key = k;
return key->messageId;
}
static gint
ldap_info_equal_unmatched(gconstpointer k1, gconstpointer k2)
{
const ldap_call_response_t *key1 = k1;
const ldap_call_response_t *key2 = k2;
return key1->messageId==key2->messageId;
}
static value_string msgTypes [] = {
{LDAP_REQ_BIND, "Bind Request"},
{LDAP_REQ_UNBIND, "Unbind Request"},
{LDAP_REQ_SEARCH, "Search Request"},
{LDAP_REQ_MODIFY, "Modify Request"},
{LDAP_REQ_ADD, "Add Request"},
{LDAP_REQ_DELETE, "Delete Request"},
{LDAP_REQ_MODRDN, "Modify RDN Request"},
{LDAP_REQ_COMPARE, "Compare Request"},
{LDAP_REQ_ABANDON, "Abandon Request"},
{LDAP_REQ_EXTENDED, "Extended Request"},
{LDAP_RES_BIND, "Bind Result"},
{LDAP_RES_SEARCH_ENTRY, "Search Entry"},
{LDAP_RES_SEARCH_RESULT, "Search Result"},
{LDAP_RES_SEARCH_REF, "Search Result Reference"},
{LDAP_RES_MODIFY, "Modify Result"},
{LDAP_RES_ADD, "Add Result"},
{LDAP_RES_DELETE, "Delete Result"},
{LDAP_RES_MODRDN, "Modify RDN Result"},
{LDAP_RES_COMPARE, "Compare Result"},
{LDAP_RES_EXTENDED, "Extended Response"},
{0, NULL},
};
static const value_string LDAPResultCode_vals[] = {
{ 0, "success" },
{ 1, "operationsError" },
{ 2, "protocolError" },
{ 3, "timeLimitExceeded" },
{ 4, "sizeLimitExceeded" },
{ 5, "compareFalse" },
{ 6, "compareTrue" },
{ 7, "authMethodNotSupported" },
{ 8, "strongAuthRequired" },
{ 10, "referral" },
{ 11, "adminLimitExceeded" },
{ 12, "unavailableCriticalExtension" },
{ 13, "confidentialityRequired" },
{ 14, "saslBindInProgress" },
{ 16, "noSuchAttribute" },
{ 17, "undefinedAttributeType" },
{ 18, "inappropriateMatching" },
{ 19, "constraintViolation" },
{ 20, "attributeOrValueExists" },
{ 21, "invalidAttributeSyntax" },
{ 32, "noSuchObject" },
{ 33, "aliasProblem" },
{ 34, "invalidDNSyntax" },
{ 36, "aliasDereferencingProblem" },
{ 48, "inappropriateAuthentication" },
{ 49, "invalidCredentials" },
{ 50, "insufficientAccessRights" },
{ 51, "busy" },
{ 52, "unavailable" },
{ 53, "unwillingToPerform" },
{ 54, "loopDetect" },
{ 64, "namingViolation" },
{ 65, "objectClassViolation" },
{ 66, "notAllowedOnNonLeaf" },
{ 67, "notAllowedOnRDN" },
{ 68, "entryAlreadyExists" },
{ 69, "objectClassModsProhibited" },
{ 71, "affectsMultipleDSAs" },
{ 80, "other" },
{ 0, NULL }
};
static int read_length(ASN1_SCK *a, proto_tree *tree, int hf_id, guint *len)
{
guint length = 0;
gboolean def = FALSE;
int start = a->offset;
int ret;
ret = asn1_length_decode(a, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse length: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if (len)
*len = length;
if (tree)
proto_tree_add_uint(tree, hf_id, a->tvb, start, a->offset-start, length);
return ASN1_ERR_NOERROR;
}
static int read_sequence(ASN1_SCK *a, guint *len)
{
guint cls, con, tag;
gboolean def;
guint length = 0;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR)
return ret;
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SEQ)
return ASN1_ERR_WRONG_TYPE;
if (len)
*len = length;
return ASN1_ERR_NOERROR;
}
static int read_set(ASN1_SCK *a, guint *len)
{
guint cls, con, tag;
gboolean def;
guint length;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR)
return ret;
if (cls != ASN1_UNI || con != ASN1_CON || tag != ASN1_SET)
return ASN1_ERR_WRONG_TYPE;
if (len)
*len = length;
return ASN1_ERR_NOERROR;
}
static int read_integer_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i, int start, guint length)
{
guint integer = 0;
proto_item *temp_item = NULL;
int ret;
ret = asn1_uint32_value_decode(a, length, &integer);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if (i)
*i = integer;
if (tree)
temp_item = proto_tree_add_uint(tree, hf_id, a->tvb, start, a->offset-start, integer);
if (new_item)
*new_item = temp_item;
return ASN1_ERR_NOERROR;
}
static int read_integer(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint length;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_UNI || con != ASN1_PRI || tag != expected_tag)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
(hf_id != -1) ? proto_registrar_get_name(hf_id) : "LDAP message",
asn1_err_to_str(ret));
}
return ret;
}
return read_integer_value(a, tree, hf_id, new_item, i, start, length);
}
static int read_boolean_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i, int start, guint length)
{
guint integer = 0;
proto_item *temp_item = NULL;
int ret;
ret = asn1_uint32_value_decode(a, length, &integer);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if (i)
*i = integer;
if (tree)
temp_item = proto_tree_add_boolean(tree, hf_id, a->tvb, start, a->offset-start, integer);
if (new_item)
*new_item = temp_item;
return ASN1_ERR_NOERROR;
}
static int read_boolean(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, guint *i)
{
guint cls, con, tag;
gboolean def;
guint length;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_UNI || con != ASN1_PRI || tag != ASN1_BOL)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
return read_boolean_value(a, tree, hf_id, new_item, i, start, length);
}
static int read_string_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, int start, guint length)
{
guchar *string;
proto_item *temp_item = NULL;
int ret;
if (length)
{
ret = asn1_string_value_decode(a, length, &string);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
string = g_realloc(string, length + 1);
string[length] = '\0';
}
else
string = g_strdup("(null)");
if (tree)
temp_item = proto_tree_add_string(tree, hf_id, a->tvb, start, a->offset - start, string);
if (new_item)
*new_item = temp_item;
if (s && length)
*s = string;
else
g_free(string);
return ASN1_ERR_NOERROR;
}
static int read_string(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, guint *length,
guint expected_cls, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint tmplen;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &tmplen);
if (ret == ASN1_ERR_NOERROR) {
if (cls != expected_cls || con != ASN1_PRI || tag != expected_tag)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
if(length){
*length=tmplen;
}
return read_string_value(a, tree, hf_id, new_item, s, start, tmplen);
}
static int read_bytestring_value(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, int start, guint length)
{
guchar *string;
proto_item *temp_item = NULL;
int ret;
if (length)
{
ret = asn1_string_value_decode(a, length, &string);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse value: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
string = g_realloc(string, length + 1);
string[length] = '\0';
}
else
string = "(null)";
if (tree && length > 0) {
temp_item = proto_tree_add_bytes(tree, hf_id, a->tvb, start, a->offset - start, string);
}
if (new_item)
*new_item = temp_item;
if (s && length)
*s = string;
else if (length)
g_free(string);
return ASN1_ERR_NOERROR;
}
static int read_bytestring(ASN1_SCK *a, proto_tree *tree, int hf_id,
proto_item **new_item, char **s, guint expected_cls, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint length;
int start = a->offset;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != expected_cls || con != ASN1_PRI || tag != expected_tag)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
}
return ret;
}
return read_bytestring_value(a, tree, hf_id, new_item, s, start, length);
}
static int check_optional_tag(ASN1_SCK *a, guint expected_cls, guint expected_con, guint expected_tag)
{
guint cls, con, tag;
gboolean def;
guint length;
int ret;
int replay_offset;
replay_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != expected_cls || con != expected_con || tag != expected_tag) {
ret = ASN1_ERR_WRONG_TYPE;
}
}
a->offset = replay_offset;
return ret;
}
static int parse_filter_strings(ASN1_SCK *a, char **filter, guint *filter_length, const guchar *operation)
{
guchar *string;
guchar *string2;
guint string_length;
guint string2_length;
guint string_bytes;
char *filterp;
int ret;
ret = asn1_octet_string_decode(a, &string, &string_length, &string_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
ret = asn1_octet_string_decode(a, &string2, &string2_length, &string_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
*filter_length += 2 + strlen(operation) + string_length + string2_length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
filterp += g_snprintf(filterp, (*filter_length)-(filterp-*filter), "(%s%s%s)", string, operation, string2);
g_free(string);
g_free(string2);
return ASN1_ERR_NOERROR;
}
/* Richard Dawe: To parse substring filters, I added this function. */
static int parse_filter_substrings(ASN1_SCK *a, char **filter, guint *filter_length)
{
int end;
guchar *string;
char *filterp;
guint string_length;
guint string_bytes;
guint seq_len;
guint header_bytes;
int ret, any_valued;
/* For ASN.1 parsing of octet strings */
guint cls;
guint con;
guint tag;
gboolean def;
ret = asn1_octet_string_decode(a, &string, &string_length, &string_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
ret = asn1_sequence_decode(a, &seq_len, &header_bytes);
if (ret != ASN1_ERR_NOERROR)
return ret;
*filter_length += 2 + 1 + string_length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '(';
if (string_length != 0) {
memcpy(filterp, string, string_length);
filterp += string_length;
}
*filterp++ = '=';
*filterp = '\0';
g_free(string);
/* Now decode seq_len's worth of octet strings. */
any_valued = 0;
end = a->offset + seq_len;
while (a->offset < end) {
/* Octet strings here are context-specific, which
* asn1_octet_string_decode() barfs on. Emulate it, but don't barf. */
ret = asn1_header_decode (a, &cls, &con, &tag, &def, &string_length);
if (ret != ASN1_ERR_NOERROR)
return ret;
/* XXX - check the tag? */
if (cls != ASN1_CTX || con != ASN1_PRI) {
/* XXX - handle the constructed encoding? */
return ASN1_ERR_WRONG_TYPE;
}
if (!def)
return ASN1_ERR_LENGTH_NOT_DEFINITE;
ret = asn1_string_value_decode(a, (int) string_length, &string);
if (ret != ASN1_ERR_NOERROR)
return ret;
/* If we have an 'any' component with a string value, we need to append
* an extra asterisk before final component. */
if ((tag == 1) && (string_length != 0))
any_valued = 1;
if ( (tag == 1) || ((tag == 2) && any_valued) )
(*filter_length)++;
*filter_length += string_length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
if ( (tag == 1) || ((tag == 2) && any_valued) )
*filterp++ = '*';
if (tag == 2)
any_valued = 0;
if (string_length != 0) {
memcpy(filterp, string, string_length);
filterp += string_length;
}
*filterp = '\0';
g_free(string);
}
if (any_valued)
{
(*filter_length)++;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '*';
}
/* NB: Allocated byte for this earlier */
*filterp++ = ')';
*filterp = '\0';
return ASN1_ERR_NOERROR;
}
/*
* Richard Sharpe: Add parsing of extensibleMatch filters.
* It's real easy to provoke ldapsearch into producing requests that allow us
* to see what is being produced:
* ldapsearch '(departmentNumber:2.16.840.1.113730.3.3.2.46.1:=>=N4709)' -x \
* cn sn telephoneNumber
*/
static int parse_filter_extensibleMatch(ASN1_SCK *a, char **filter, guint *filter_length, guint byte_length)
{
static char *dnString = "dn";
int ret;
guint length;
char *filterp;
guint seq_len;
guint header_bytes;
guint string_length;
guint end;
guchar *matchingRule, *type, *matchValue;
gboolean dnAttributes;
/* ASN.1 parsing vars ... */
guint cls;
guint con;
guint tag;
gboolean def;
/*
* MatchingRuleAssertion ::= SEQUENCE {
* matchingRule [1] MatchingRuleId OPTIONAL,
* type [2] AttributeDescription OPTIONAL,
* matchValue [3] AssertionValue,
* dnAttributes [4] BOOLEAN DEFAULT FALSE
* }
* Of course, SEQUENCE is merged with the filter
* so there is no separate 30 ...
*/
/*
* Decode byte_length of stuff ... as per above
* But we assemble the strings and the boolean
* if present, and then assemble the filter
* expression
*/
matchingRule = type = matchValue = NULL;
dnAttributes = FALSE;
end = a->offset + byte_length;
while ((guint)a->offset < end) {
/*
* Now, parse out each of those items
* There will be up to four of them.
*/
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &string_length);
if (ret != ASN1_ERR_NOERROR) {
return ret;
}
/*
* Now, check the tag ...
*/
if (cls != ASN1_CTX || con != ASN1_PRI) {
return ASN1_ERR_WRONG_TYPE;
}
if (!def) {
return ASN1_ERR_LENGTH_NOT_DEFINITE;
}
switch (tag) {
case 0x01: /* Parse Matching Rule Id */
if (matchingRule != NULL) {
g_free(matchingRule);
matchingRule = NULL;
}
ret = asn1_string_value_decode(a, (int) string_length, &matchingRule);
if (ret != ASN1_ERR_NOERROR) {
return ret;
}
break;
case 0x02: /* Parse attributeDescription */
if (type != NULL) {
g_free(type);
type = NULL;
}
ret = asn1_string_value_decode(a, (int) string_length, &type);
if (ret != ASN1_ERR_NOERROR) {
return ret;
}
break;
case 0x03: /* Parse the matchValue */
if (matchValue != NULL) {
g_free(matchValue);
matchValue = NULL;
}
ret = asn1_string_value_decode(a, (int) string_length, &matchValue);
if (ret != ASN1_ERR_NOERROR) {
return ret;
}
break;
case 0x04: /* Parse dnAttributes boolean */
ret = asn1_bool_decode(a, (int)string_length, &dnAttributes);
if (ret != ASN1_ERR_NOERROR) {
return ret;
}
break;
default:
return ASN1_ERR_WRONG_TYPE;
}
}
/*
* Now, fill in the filter string.
* First, calc how much space is needed and then realloc.
*/
*filter_length += 1; /* For the ( */
if (type) *filter_length += strlen(type) + 1;
if (dnAttributes) *filter_length += strlen(dnString) + 1;
if (matchingRule) *filter_length += strlen(matchingRule) + 1;
if (matchValue) *filter_length += strlen(matchValue) + 1;
*filter_length += 1; /* for the ) */
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '(';
if (type) {
if (strlen(type) > 0) {
memcpy(filterp, type, strlen(type));
filterp += strlen(type);
*filterp++ = ':';
/*
* Add in dn if needed ...
*/
if (dnAttributes) {
memcpy(filterp, dnString, strlen(dnString));
filterp += strlen(dnString);
*filterp++ = ':';
}
}
g_free(type);
}
if (matchingRule) {
if (strlen(matchingRule) > 0) {
memcpy(filterp, matchingRule, strlen(matchingRule));
filterp += strlen(matchingRule);
*filterp++ = ':';
}
g_free(matchingRule);
}
if (matchValue) {
if (strlen(matchValue) > 0) {
memcpy(filterp, matchValue, strlen(matchValue));
filterp += strlen(matchValue);
}
g_free(matchValue);
}
*filterp++ = ')';
*filterp = '\0'; /* There had better be space */
return ASN1_ERR_NOERROR;
}
/* Returns -1 if we're at the end, returns an ASN1_ERR value otherwise. */
static int parse_filter(ASN1_SCK *a, char **filter, guint *filter_length,
int *end)
{
guint cls, con, tag;
guint length;
gboolean def;
int ret;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR)
return ret;
if (*end == 0)
{
*end = a->offset + length;
*filter_length = 1;
*filter = g_malloc0(*filter_length);
}
if (cls == ASN1_CTX) /* XXX - handle other types as errors? */
{
switch (tag)
{
case LDAP_FILTER_AND:
{
int add_end;
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
add_end = a->offset + length;
*filter_length += 3;
*filter = g_realloc(*filter, *filter_length);
strcat(*filter, "(&");
while ((ret = parse_filter(a, filter, filter_length, &add_end))
== ASN1_ERR_NOERROR)
continue;
if (ret != -1)
return ret;
strcat(*filter, ")");
}
break;
case LDAP_FILTER_OR:
{
int or_end;
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
or_end = a->offset + length;
*filter_length += 3;
*filter = g_realloc(*filter, *filter_length);
strcat(*filter, "(|");
while ((ret = parse_filter(a, filter, filter_length, &or_end))
== ASN1_ERR_NOERROR)
continue;
if (ret != -1)
return ret;
strcat(*filter, ")");
}
break;
case LDAP_FILTER_NOT:
{
int not_end;
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
not_end = a->offset + length;
*filter_length += 3;
*filter = g_realloc(*filter, *filter_length);
strcat(*filter, "(!");
ret = parse_filter(a, filter, filter_length, &not_end);
if (ret != -1 && ret != ASN1_ERR_NOERROR)
return ret;
strcat(*filter, ")");
}
break;
case LDAP_FILTER_EQUALITY:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, "=");
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_GE:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, ">=");
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_LE:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, "<=");
if (ret != -1 && ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_APPROX:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_strings(a, filter, filter_length, "~=");
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_PRESENT:
{
guchar *string;
char *filterp;
if (con != ASN1_PRI)
return ASN1_ERR_WRONG_TYPE;
ret = asn1_string_value_decode(a, length, &string);
if (ret != ASN1_ERR_NOERROR)
return ret;
*filter_length += 4 + length;
*filter = g_realloc(*filter, *filter_length);
filterp = *filter + strlen(*filter);
*filterp++ = '(';
if (length != 0) {
memcpy(filterp, string, length);
filterp += length;
}
*filterp++ = '=';
*filterp++ = '*';
*filterp++ = ')';
*filterp = '\0';
g_free(string);
}
break;
case LDAP_FILTER_SUBSTRINGS:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
/* Richard Dawe: Handle substrings */
ret = parse_filter_substrings(a, filter, filter_length);
if (ret != ASN1_ERR_NOERROR)
return ret;
break;
case LDAP_FILTER_EXTENSIBLE:
if (con != ASN1_CON)
return ASN1_ERR_WRONG_TYPE;
ret = parse_filter_extensibleMatch(a, filter, filter_length, length);
if (ret != ASN1_ERR_NOERROR) {
return ret;
}
break;
default:
return ASN1_ERR_WRONG_TYPE;
}
}
if (a->offset == *end)
return -1;
else
return ASN1_ERR_NOERROR;
}
static gboolean read_filter(ASN1_SCK *a, proto_tree *tree, int hf_id)
{
int start = a->offset;
char *filter = 0;
guint filter_length = 0;
int end = 0;
int ret;
while ((ret = parse_filter(a, &filter, &filter_length, &end))
== ASN1_ERR_NOERROR)
continue;
if (tree) {
if (ret != -1) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Can't parse filter: %s",
proto_registrar_get_name(hf_id), asn1_err_to_str(ret));
} else
proto_tree_add_string(tree, hf_id, a->tvb, start, a->offset-start, filter);
}
g_free(filter);
return (ret == -1) ? TRUE : FALSE;
}
/********************************************************************************************/
static void dissect_ldap_result(ASN1_SCK *a, proto_tree *tree, packet_info *pinfo)
{
guint resultCode = 0;
int ret;
if (read_integer(a, tree, hf_ldap_message_result, 0, &resultCode, ASN1_ENUM) != ASN1_ERR_NOERROR)
return;
if (resultCode != 0) {
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
val_to_str(resultCode, LDAPResultCode_vals,
"Unknown (%u)"));
}
if (read_string(a, tree, hf_ldap_message_result_matcheddn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (read_string(a, tree, hf_ldap_message_result_errormsg, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (resultCode == 10) /* Referral */
{
int start = a->offset;
int end;
guint length;
proto_item *ti;
proto_tree *referralTree;
ret = read_sequence(a, &length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"ERROR: Couldn't parse referral URL sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
ti = proto_tree_add_text(tree, a->tvb, start, length, "Referral URLs");
referralTree = proto_item_add_subtree(ti, ett_ldap_referrals);
end = a->offset + length;
while (a->offset < end) {
if (read_string(a, referralTree, hf_ldap_message_result_referral, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
}
static void dissect_ldap_request_bind(ASN1_SCK *a, proto_tree *tree,
tvbuff_t *tvb, packet_info *pinfo, ldap_conv_info_t *ldap_info)
{
guint cls, con, tag;
gboolean def;
guint length;
int start;
int end;
int ret;
char *mechanism, *s = NULL;
int token_offset;
gint available_length, reported_length;
tvbuff_t *new_tvb;
if (read_integer(a, tree, hf_ldap_message_bind_version, 0, 0, ASN1_INT) != ASN1_ERR_NOERROR)
return;
if (read_string(a, tree, hf_ldap_message_bind_dn, 0, &s, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", DN=%s", s != NULL ? s : "(null)");
g_free(s);
start = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_CTX) {
/* RFCs 1777 and 2251 say these are context-specific types */
ret = ASN1_ERR_WRONG_TYPE;
}
}
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth),
asn1_err_to_str(ret));
return;
}
proto_tree_add_uint(tree, hf_ldap_message_bind_auth, a->tvb, start,
a->offset - start, tag);
end = a->offset + length;
switch (tag)
{
case LDAP_AUTH_SIMPLE:
if (read_string_value(a, tree, hf_ldap_message_bind_auth_password, NULL,
NULL, start, length) != ASN1_ERR_NOERROR)
return;
break;
/* For Kerberos V4, dissect it as a ticket. */
case LDAP_AUTH_SASL:
mechanism = NULL;
if (read_string(a, tree, hf_ldap_message_bind_auth_mechanism, NULL,
&mechanism, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
/*
* We need to remember the authentication type and mechanism for this
* conversation.
*
* XXX - actually, we might need to remember more than one
* type and mechanism, if you can unbind and rebind with a
* different type and/or mechanism.
*/
ldap_info->auth_type = tag;
ldap_info->auth_mech = mechanism;
ldap_info->first_auth_frame = 0; /* not known until we see the bind reply */
/*
* If the mechanism in this request is an empty string (which is
* returned as a null pointer), use the saved mechanism instead.
* Otherwise, if the saved mechanism is an empty string (null),
* save this mechanism.
*/
if (mechanism == NULL)
mechanism = ldap_info->auth_mech;
else {
if (ldap_info->auth_mech == NULL) {
g_free(ldap_info->auth_mech);
}
ldap_info->auth_mech = mechanism;
}
if (a->offset < end) {
if (mechanism != NULL && strcmp(mechanism, "GSS-SPNEGO") == 0) {
/*
* This is a GSS-API token ancapsulated within GSS-SPNEGO.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
DISSECTOR_ASSERT(available_length >= 0);
DISSECTOR_ASSERT(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > length)
available_length = length;
if ((guint)reported_length > length)
reported_length = length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, tree);
a->offset += length;
} else if (mechanism != NULL && strcmp(mechanism, "GSSAPI") == 0) {
/*
* This is a raw GSS-API token.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
if(length==0){
/* for GSSAPI the third pdu will sometimes be "empty" */
return;
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
DISSECTOR_ASSERT(available_length >= 0);
DISSECTOR_ASSERT(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > length)
available_length = length;
if ((guint)reported_length > length)
reported_length = length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, tree);
a->offset += length;
} else {
if (read_bytestring(a, tree, hf_ldap_message_bind_auth_credentials,
NULL, NULL, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
break;
}
}
static void dissect_ldap_response_bind(ASN1_SCK *a, proto_tree *tree,
int start, guint length, tvbuff_t *tvb, packet_info *pinfo, ldap_conv_info_t *ldap_info)
{
guint cls, con, tag;
gboolean def;
guint cred_length;
int end;
int ret;
int token_offset;
gint available_length, reported_length;
tvbuff_t *new_tvb;
end = start + length;
dissect_ldap_result(a, tree, pinfo);
if (a->offset < end) {
switch (ldap_info->auth_type) {
/* For Kerberos V4, dissect it as a ticket. */
/* XXX - what about LDAP_AUTH_SIMPLE? */
case LDAP_AUTH_SASL:
/*
* All frames after this are assumed to use a security layer.
*
* XXX - won't work if there's another reply, with the security
* layer, starting in the same TCP segment that ends this
* reply, but as LDAP is a request/response protocol, and
* as the client probably can't start using authentication until
* it gets the bind reply and the server won't send a reply until
* it gets a request, that probably won't happen.
*
* XXX - that assumption is invalid; it's not clear where the
* hell you find out whether there's any security layer. In
* one capture, we have two GSS-SPNEGO negotiations, both of
* which select MS KRB5, and the only differences in the tokens
* is in the RC4-HMAC ciphertext. The various
* draft-ietf--cat-sasl-gssapi-NN.txt drafts seem to imply
* that the RFC 2222 spoo with the bitmask and maximum
* output message size stuff is done - but where does that
* stuff show up? Is it in the ciphertext, which means it's
* presumably encrypted?
*
* Grrr. We have to do a gross heuristic, checking whether the
* putative LDAP message begins with 0x00 or not, making the
* assumption that we won't have more than 2^24 bytes of
* encapsulated stuff.
*/
ldap_info->first_auth_frame = pinfo->fd->num + 1;
if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSS-SPNEGO") == 0) {
/*
* This is a GSS-API token.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &cred_length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
DISSECTOR_ASSERT(available_length >= 0);
DISSECTOR_ASSERT(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > cred_length)
available_length = cred_length;
if ((guint)reported_length > cred_length)
reported_length = cred_length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, tree);
a->offset += cred_length;
} else if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSSAPI") == 0) {
/*
* This is a GSS-API token.
* Find out how big it is by parsing the ASN.1 header for the
* OCTET STREAM that contains it.
*/
token_offset = a->offset;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &cred_length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, token_offset, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_bind_auth_credentials),
asn1_err_to_str(ret));
return;
}
available_length = tvb_length_remaining(tvb, token_offset);
reported_length = tvb_reported_length_remaining(tvb, token_offset);
DISSECTOR_ASSERT(available_length >= 0);
DISSECTOR_ASSERT(reported_length >= 0);
if (available_length > reported_length)
available_length = reported_length;
if ((guint)available_length > cred_length)
available_length = cred_length;
if ((guint)reported_length > cred_length)
reported_length = cred_length;
new_tvb = tvb_new_subset(tvb, a->offset, available_length, reported_length);
call_dissector(gssapi_handle, new_tvb, pinfo, tree);
a->offset += cred_length;
} else {
if (read_bytestring(a, tree, hf_ldap_message_bind_server_credentials,
NULL, NULL, ASN1_CTX, 7) != ASN1_ERR_NOERROR)
return;
}
break;
}
}
}
static void dissect_ldap_request_search(ASN1_SCK *a, proto_tree *tree, packet_info *pinfo)
{
guint seq_length;
int end;
int ret;
char *s = NULL;
if (read_string(a, tree, hf_ldap_message_search_base, 0, &s, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", Base DN=%s", s != NULL ? s : "(null)");
g_free(s);
if (read_integer(a, tree, hf_ldap_message_search_scope, 0, 0, ASN1_ENUM) != ASN1_ERR_NOERROR)
return;
if (read_integer(a, tree, hf_ldap_message_search_deref, 0, 0, ASN1_ENUM) != ASN1_ERR_NOERROR)
return;
if (read_integer(a, tree, hf_ldap_message_search_sizeLimit, 0, 0, ASN1_INT) != ASN1_ERR_NOERROR)
return;
if (read_integer(a, tree, hf_ldap_message_search_timeLimit, 0, 0, ASN1_INT) != ASN1_ERR_NOERROR)
return;
if (read_boolean(a, tree, hf_ldap_message_search_typesOnly, 0, 0) != ASN1_ERR_NOERROR)
return;
if (!read_filter(a, tree, hf_ldap_message_search_filter))
return;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP attribute sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end = a->offset + seq_length;
while (a->offset < end) {
if (read_string(a, tree, hf_ldap_message_attribute, 0, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
static int dissect_mscldap_string(tvbuff_t *tvb, int offset, char *str, int maxlen, gboolean prepend_dot)
{
guint8 len;
len=tvb_get_guint8(tvb, offset);
offset+=1;
*str=0;
while(len){
/* add potential field separation dot */
if(prepend_dot){
if(!maxlen){
*str=0;
return offset;
}
maxlen--;
*str++='.';
*str=0;
}
if(len==0xc0){
int new_offset;
/* ops its a mscldap compressed string */
new_offset=tvb_get_guint8(tvb, offset);
if (new_offset == offset - 1)
THROW(ReportedBoundsError);
offset+=1;
dissect_mscldap_string(tvb, new_offset, str, maxlen, FALSE);
return offset;
}
prepend_dot=TRUE;
if(maxlen<=len){
if(maxlen>3){
*str++='.';
*str++='.';
*str++='.';
}
*str=0;
return offset; /* will mess up offset in caller, is unlikely */
}
tvb_memcpy(tvb, str, offset, len);
str+=len;
*str=0;
maxlen-=len;
offset+=len;
len=tvb_get_guint8(tvb, offset);
offset+=1;
}
*str=0;
return offset;
}
/* These flag bits were found to be defined in the samba sources.
* I hope they are correct (but have serious doubts about the CLOSEST
* bit being used or being meaningful).
*/
static const true_false_string tfs_ads_pdc = {
"This is a PDC",
"This is NOT a pdc"
};
static const true_false_string tfs_ads_gc = {
"This is a GLOBAL CATALOGUE of forest",
"This is NOT a global catalog of forest"
};
static const true_false_string tfs_ads_ldap = {
"This is an LDAP server",
"This is NOT an ldap server"
};
static const true_false_string tfs_ads_ds = {
"This dc supports DS",
"This dc does NOT support ds"
};
static const true_false_string tfs_ads_kdc = {
"This is a KDC (kerberos)",
"This is NOT a kdc (kerberos)"
};
static const true_false_string tfs_ads_timeserv = {
"This dc is running TIME SERVICES (ntp)",
"This dc is NOT running time services (ntp)"
};
static const true_false_string tfs_ads_closest = {
"This is the CLOSEST dc (unreliable?)",
"This is NOT the closest dc"
};
static const true_false_string tfs_ads_writable = {
"This dc is WRITABLE",
"This dc is NOT writable"
};
static const true_false_string tfs_ads_good_timeserv = {
"This dc has a GOOD TIME SERVICE (i.e. hardware clock)",
"This dc does NOT have a good time service (i.e. no hardware clock)"
};
static const true_false_string tfs_ads_ndnc = {
"Domain is NON-DOMAIN NC serviced by ldap server",
"Domain is NOT non-domain nc serviced by ldap server"
};
static int dissect_mscldap_netlogon_flags(proto_tree *parent_tree, tvbuff_t *tvb, int offset)
{
guint32 flags;
proto_item *item;
proto_tree *tree=NULL;
flags=tvb_get_letohl(tvb, offset);
item=proto_tree_add_item(parent_tree, hf_mscldap_netlogon_flags, tvb, offset, 4, TRUE);
if(parent_tree){
tree = proto_item_add_subtree(item, ett_mscldap_netlogon_flags);
}
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_ndnc,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_good_timeserv,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_writable,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_closest,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_timeserv,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_kdc,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_ds,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_ldap,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_gc,
tvb, offset, 4, flags);
proto_tree_add_boolean(tree, hf_mscldap_netlogon_flags_pdc,
tvb, offset, 4, flags);
offset += 4;
return offset;
}
static void dissect_mscldap_response_netlogon(proto_tree *tree, tvbuff_t *tvb)
{
int old_offset, offset=0;
char str[256];
/*qqq*/
/* Type */
/*XXX someone that knows what the type means should add that knowledge here*/
proto_tree_add_item(tree, hf_mscldap_netlogon_type, tvb, offset, 4, TRUE);
offset += 4;
/* Flags */
offset = dissect_mscldap_netlogon_flags(tree, tvb, offset);
/* Domain GUID */
proto_tree_add_item(tree, hf_mscldap_domain_guid, tvb, offset, 16, TRUE);
offset += 16;
/* Forest */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_forest, tvb, old_offset, offset-old_offset, str);
/* Domain */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_domain, tvb, old_offset, offset-old_offset, str);
/* Hostname */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_hostname, tvb, old_offset, offset-old_offset, str);
/* NetBios Domain */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_nb_domain, tvb, old_offset, offset-old_offset, str);
/* NetBios Hostname */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_nb_hostname, tvb, old_offset, offset-old_offset, str);
/* User */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_username, tvb, old_offset, offset-old_offset, str);
/* Site */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_sitename, tvb, old_offset, offset-old_offset, str);
/* Client Site */
old_offset=offset;
offset=dissect_mscldap_string(tvb, offset, str, 255, FALSE);
proto_tree_add_string(tree, hf_mscldap_clientsitename, tvb, old_offset, offset-old_offset, str);
/* Version */
proto_tree_add_item(tree, hf_mscldap_netlogon_version, tvb, offset, 4, TRUE);
offset += 4;
/* LM Token */
proto_tree_add_item(tree, hf_mscldap_netlogon_lm_token, tvb, offset, 2, TRUE);
offset += 2;
/* NT Token */
proto_tree_add_item(tree, hf_mscldap_netlogon_nt_token, tvb, offset, 2, TRUE);
offset += 2;
}
static void dissect_mscldap_response(proto_tree *tree, tvbuff_t *tvb, guint32 rpc)
{
switch(rpc){
case MSCLDAP_RPC_NETLOGON:
dissect_mscldap_response_netlogon(tree, tvb);
break;
default:
proto_tree_add_text(tree, tvb, 0, tvb_length(tvb),
"ERROR: Unknown type of MS-CLDAP RPC call");
}
}
static void dissect_ldap_response_search_entry(ASN1_SCK *a, proto_tree *tree,
gboolean is_mscldap)
{
guint seq_length;
int end_of_sequence;
int ret;
char *str=NULL;
guint32 len;
guint32 mscldap_rpc;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse search entry response sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_sequence = a->offset + seq_length;
while (a->offset < end_of_sequence)
{
proto_item *ti;
proto_tree *attr_tree;
guint set_length;
int end_of_set;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP attribute sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
if (read_string(a, tree, hf_ldap_message_attribute, &ti, &str, &len, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
mscldap_rpc=0;
if(is_mscldap){
if(str && !strncmp(str, "netlogon", 8)){
mscldap_rpc=MSCLDAP_RPC_NETLOGON;
}
}
g_free(str);
str=NULL;
attr_tree = proto_item_add_subtree(ti, ett_ldap_attribute);
ret = read_set(a, &set_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(attr_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP value set header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_set = a->offset + set_length;
while (a->offset < end_of_set) {
if(!is_mscldap){
if (read_string(a, attr_tree, hf_ldap_message_value, 0, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR){
return;
}
} else {
guint cls, con, tag;
gboolean def;
guint len;
int start = a->offset;
int ret;
tvbuff_t *mscldap_tvb=NULL;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
if (cls != ASN1_UNI || con != ASN1_PRI || tag != ASN1_OTS)
ret = ASN1_ERR_WRONG_TYPE;
}
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"%s: ERROR: Couldn't parse header: %s",
proto_registrar_get_name(hf_ldap_message_value), asn1_err_to_str(ret));
}
return;
}
mscldap_tvb=tvb_new_subset(a->tvb, a->offset, len, len);
dissect_mscldap_response(attr_tree, mscldap_tvb, mscldap_rpc);
a->offset+=len;
}
}
}
}
static void dissect_ldap_response_search_ref(ASN1_SCK *a, proto_tree *tree)
{
read_string(a, tree, hf_ldap_message_search_reference, 0, 0, 0, ASN1_UNI, ASN1_OTS);
}
static void dissect_ldap_request_add(ASN1_SCK *a, proto_tree *tree, packet_info *pinfo)
{
guint seq_length;
int end_of_sequence;
int ret;
char *s = NULL;
if (read_string(a, tree, hf_ldap_message_dn, 0, &s, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", DN=%s", s != NULL ? s : "(null)");
g_free(s);
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse add request sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_sequence = a->offset + seq_length;
while (a->offset < end_of_sequence)
{
proto_item *ti;
proto_tree *attr_tree;
guint set_length;
int end_of_set;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP attribute sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
if (read_string(a, tree, hf_ldap_message_attribute, &ti, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
attr_tree = proto_item_add_subtree(ti, ett_ldap_attribute);
ret = read_set(a, &set_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(attr_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP value set header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_set = a->offset + set_length;
while (a->offset < end_of_set) {
if (read_string(a, attr_tree, hf_ldap_message_value, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
}
static void dissect_ldap_request_delete(ASN1_SCK *a, proto_tree *tree,
int start, guint length)
{
read_string_value(a, tree, hf_ldap_message_dn, NULL, NULL, start, length);
}
static void dissect_ldap_request_modifyrdn(ASN1_SCK *a, proto_tree *tree,
guint length)
{
int start = a->offset;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (read_string(a, tree, hf_ldap_message_modrdn_name, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
if (read_boolean(a, tree, hf_ldap_message_modrdn_delete, 0, 0) != ASN1_ERR_NOERROR)
return;
if (a->offset < (int) (start + length)) {
/* LDAP V3 Modify DN operation, with newSuperior */
/* "newSuperior [0] LDAPDN OPTIONAL" (0x80) */
if (read_string(a, tree, hf_ldap_message_modrdn_superior, 0, 0, 0, ASN1_CTX, 0) != ASN1_ERR_NOERROR)
return;
}
}
static void dissect_ldap_request_compare(ASN1_SCK *a, proto_tree *tree)
{
int start;
int length;
char *string1 = NULL;
char *string2 = NULL;
const char *s1, *s2;
char *compare;
int ret;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse compare request sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
start = a->offset;
ret = read_string(a, 0, -1, 0, &string1, 0, ASN1_UNI, ASN1_OTS);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"ERROR: Couldn't parse compare type: %s", asn1_err_to_str(ret));
}
return;
}
ret = read_string(a, 0, -1, 0, &string2, 0, ASN1_UNI, ASN1_OTS);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, start, 0,
"ERROR: Couldn't parse compare value: %s", asn1_err_to_str(ret));
}
g_free(string1);
return;
}
s1 = (string1 == NULL) ? "(null)" : string1;
s2 = (string2 == NULL) ? "(null)" : string2;
length = 2 + strlen(s1) + strlen(s2);
compare = g_malloc0(length);
g_snprintf(compare, length, "%s=%s", s1, s2);
proto_tree_add_string(tree, hf_ldap_message_compare, a->tvb, start,
a->offset-start, compare);
g_free(string1);
g_free(string2);
g_free(compare);
return;
}
static void dissect_ldap_request_modify(ASN1_SCK *a, proto_tree *tree)
{
guint seq_length;
int end_of_sequence;
int ret;
if (read_string(a, tree, hf_ldap_message_dn, 0, 0, 0, ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify request sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_sequence = a->offset + seq_length;
while (a->offset < end_of_sequence)
{
proto_item *ti;
proto_tree *attr_tree;
guint set_length;
int end_of_set;
guint operation;
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify request item sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
ret = read_integer(a, 0, -1, 0, &operation, ASN1_ENUM);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify operation: %s",
asn1_err_to_str(ret));
return;
}
}
ret = read_sequence(a, 0);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse modify request operation sequence header: %s",
asn1_err_to_str(ret));
}
return;
}
switch (operation)
{
case LDAP_MOD_ADD:
if (read_string(a, tree, hf_ldap_message_modify_add, &ti, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
break;
case LDAP_MOD_REPLACE:
if (read_string(a, tree, hf_ldap_message_modify_replace, &ti, 0, 0,
ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
break;
case LDAP_MOD_DELETE:
if (read_string(a, tree, hf_ldap_message_modify_delete, &ti, 0, 0,
ASN1_UNI, ASN1_OTS) != ASN1_ERR_NOERROR)
return;
break;
default:
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"Unknown LDAP modify operation (%u)", operation);
return;
}
attr_tree = proto_item_add_subtree(ti, ett_ldap_attribute);
ret = read_set(a, &set_length);
if (ret != ASN1_ERR_NOERROR) {
if (tree) {
proto_tree_add_text(attr_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP value set header: %s",
asn1_err_to_str(ret));
}
return;
}
end_of_set = a->offset + set_length;
while (a->offset < end_of_set) {
if (read_string(a, attr_tree, hf_ldap_message_value, 0, 0, 0, ASN1_UNI,
ASN1_OTS) != ASN1_ERR_NOERROR)
return;
}
}
}
static void dissect_ldap_request_abandon(ASN1_SCK *a, proto_tree *tree,
int start, guint length)
{
read_integer_value(a, tree, hf_ldap_message_abandon_msgid, NULL, NULL,
start, length);
}
static void dissect_ldap_controls(ASN1_SCK *a, proto_tree *tree)
{
guint cls, con, tag;
gboolean def;
guint length;
int ret;
proto_item *ctrls_item = NULL;
proto_tree *ctrls_tree = NULL;
int start = a->offset;
int end;
guint ctrls_length;
ret = asn1_header_decode(a, &cls, &con, &tag, &def, &length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP Controls: %s",
asn1_err_to_str(ret));
return;
}
if (cls != ASN1_CTX || con != ASN1_CON || tag != ASN1_EOC) {
proto_tree_add_text(tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP Controls: %s",
asn1_err_to_str(ASN1_ERR_WRONG_TYPE));
return;
}
ctrls_length = (a->offset - start) + length;
ctrls_item = proto_tree_add_text(tree, a->tvb, start, ctrls_length, "LDAP Controls");
ctrls_tree = proto_item_add_subtree(ctrls_item, ett_ldap_controls);
end = a->offset + length;
while (a->offset < end) {
proto_item *ctrl_item = NULL;
proto_tree *ctrl_tree = NULL;
guint seq_length;
int seq_start = a->offset;
int seq_end;
guint ctrl_length;
ret = read_sequence(a, &seq_length);
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(ctrls_tree, a->tvb, a->offset, 0,
"ERROR: Couldn't parse LDAP Control: %s",
asn1_err_to_str(ret));
return;
}
ctrl_length = (a->offset - seq_start) + seq_length;
ctrl_item = proto_tree_add_text(ctrls_tree, a->tvb, seq_start, ctrl_length, "LDAP Control");
ctrl_tree = proto_item_add_subtree(ctrl_item, ett_ldap_control);
seq_end = a->offset + seq_length;
ret = read_string(a, ctrl_tree, hf_ldap_message_controls_oid, 0, 0, 0, ASN1_UNI, ASN1_OTS);
if (ret != ASN1_ERR_NOERROR) {
return;
}
if (a->offset >= seq_end) {
/* skip optional data */
break;
}
ret = check_optional_tag(a, ASN1_UNI, ASN1_PRI, ASN1_BOL);
if (ret == ASN1_ERR_NOERROR) {
ret = read_boolean(a, ctrl_tree, hf_ldap_message_controls_critical, 0, 0);
if (ret != ASN1_ERR_NOERROR) {
return;
}
}
if (a->offset >= seq_end) {
/* skip optional data */
break;
}
ret = check_optional_tag(a, ASN1_UNI, ASN1_PRI, ASN1_OTS);
if (ret == ASN1_ERR_NOERROR) {
ret = read_bytestring(a, ctrl_tree, hf_ldap_message_controls_value, NULL, NULL, ASN1_UNI, ASN1_OTS);
if (ret != ASN1_ERR_NOERROR) {
return;
}
}
}
}
static ldap_call_response_t *
ldap_match_call_response(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ldap_conv_info_t *ldap_info, guint messageId, guint protocolOpTag)
{
ldap_call_response_t lcr, *lcrp=NULL;
if (!pinfo->fd->flags.visited) {
switch(protocolOpTag){
case LDAP_REQ_BIND:
case LDAP_REQ_SEARCH:
case LDAP_REQ_MODIFY:
case LDAP_REQ_ADD:
case LDAP_REQ_DELETE:
case LDAP_REQ_MODRDN:
case LDAP_REQ_COMPARE:
/*case LDAP_REQ_ABANDON: we dont match for this one*/
/*case LDAP_REQ_UNBIND: we dont match for this one*/
/* check that we dont already have one of those in the
unmatched list and if so remove it */
lcr.messageId=messageId;
lcrp=g_hash_table_lookup(ldap_info->unmatched, &lcr);
if(lcrp){
g_hash_table_remove(ldap_info->unmatched, lcrp);
}
/* if we cant reuse the old one, grab a new chunk */
if(!lcrp){
lcrp=se_alloc(sizeof(ldap_call_response_t));
}
lcrp->messageId=messageId;
lcrp->req_frame=pinfo->fd->num;
lcrp->req_time=pinfo->fd->abs_ts;
lcrp->rep_frame=0;
lcrp->protocolOpTag=protocolOpTag;
lcrp->is_request=TRUE;
g_hash_table_insert(ldap_info->unmatched, lcrp, lcrp);
return NULL;
break;
case LDAP_RES_BIND:
case LDAP_RES_SEARCH_ENTRY:
case LDAP_RES_SEARCH_REF:
case LDAP_RES_SEARCH_RESULT:
case LDAP_RES_MODIFY:
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODRDN:
case LDAP_RES_COMPARE:
lcr.messageId=messageId;
lcrp=g_hash_table_lookup(ldap_info->unmatched, &lcr);
if(lcrp){
if(!lcrp->rep_frame){
g_hash_table_remove(ldap_info->unmatched, lcrp);
lcrp->rep_frame=pinfo->fd->num;
lcrp->is_request=FALSE;
g_hash_table_insert(ldap_info->matched, lcrp, lcrp);
}
}
}
}
if(!lcrp){
lcr.messageId=messageId;
switch(protocolOpTag){
case LDAP_REQ_BIND:
case LDAP_REQ_SEARCH:
case LDAP_REQ_MODIFY:
case LDAP_REQ_ADD:
case LDAP_REQ_DELETE:
case LDAP_REQ_MODRDN:
case LDAP_REQ_COMPARE:
/*case LDAP_REQ_ABANDON: we dont match for this one*/
/*case LDAP_REQ_UNBIND: we dont match for this one*/
lcr.is_request=TRUE;
lcr.req_frame=pinfo->fd->num;
lcr.rep_frame=0;
break;
case LDAP_RES_BIND:
case LDAP_RES_SEARCH_ENTRY:
case LDAP_RES_SEARCH_REF:
case LDAP_RES_SEARCH_RESULT:
case LDAP_RES_MODIFY:
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODRDN:
case LDAP_RES_COMPARE:
lcr.is_request=FALSE;
lcr.req_frame=0;
lcr.rep_frame=pinfo->fd->num;
break;
}
lcrp=g_hash_table_lookup(ldap_info->matched, &lcr);
if(lcrp){
lcrp->is_request=lcr.is_request;
}
}
if(lcrp){
if(lcrp->is_request){
proto_tree_add_uint(tree, hf_ldap_response_in, tvb, 0, 0, lcrp->rep_frame);
} else {
nstime_t ns;
proto_tree_add_uint(tree, hf_ldap_response_to, tvb, 0, 0, lcrp->req_frame);
nstime_delta(&ns, &pinfo->fd->abs_ts, &lcrp->req_time);
proto_tree_add_time(tree, hf_ldap_time, tvb, 0, 0, &ns);
}
return lcrp;
}
return NULL;
}
static void
dissect_ldap_message(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *ldap_tree, proto_item *ldap_item,
gboolean first_time, ldap_conv_info_t *ldap_info,
gboolean is_mscldap)
{
int message_id_start;
int message_id_length;
guint messageLength;
guint messageId;
int next_offset;
guint protocolOpCls, protocolOpCon, protocolOpTag;
const gchar *typestr;
guint opLen;
ASN1_SCK a;
int start;
int ret;
ldap_call_response_t *lcrp;
asn1_open(&a, tvb, offset);
ret = read_sequence(&a, &messageLength);
if (ret != ASN1_ERR_NOERROR)
{
if (first_time)
{
if (check_col(pinfo->cinfo, COL_INFO))
{
col_add_fstr(pinfo->cinfo, COL_INFO,
"Invalid LDAP message (Can't parse sequence header: %s)",
asn1_err_to_str(ret));
}
}
if (ldap_tree)
{
proto_tree_add_text(ldap_tree, tvb, offset, -1,
"Invalid LDAP message (Can't parse sequence header: %s)",
asn1_err_to_str(ret));
}
return;
}
message_id_start = a.offset;
ret = read_integer(&a, 0, hf_ldap_message_id, 0, &messageId, ASN1_INT);
if (ret != ASN1_ERR_NOERROR)
{
if (first_time && check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "Invalid LDAP packet (Can't parse Message ID: %s)",
asn1_err_to_str(ret));
if (ldap_tree)
proto_tree_add_text(ldap_tree, tvb, message_id_start, 1,
"Invalid LDAP packet (Can't parse Message ID: %s)",
asn1_err_to_str(ret));
return;
}
message_id_length = a.offset - message_id_start;
start = a.offset;
asn1_id_decode(&a, &protocolOpCls, &protocolOpCon, &protocolOpTag);
if (protocolOpCls != ASN1_APL)
typestr = "Bad message type (not Application)";
else
typestr = val_to_str(protocolOpTag, msgTypes, "Unknown message type (%u)");
if (first_time)
{
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "MsgId=%u %s",
messageId, typestr);
}
if (ldap_item)
proto_item_append_text(ldap_item, ", %s",
val_to_str(protocolOpTag, msgTypes,
"Unknown message type (%u)"));
if (ldap_tree)
{
proto_tree_add_uint(ldap_tree, hf_ldap_message_id, tvb, message_id_start, message_id_length, messageId);
if (protocolOpCls == ASN1_APL)
{
proto_tree_add_uint(ldap_tree, hf_ldap_message_type, tvb,
start, a.offset - start, protocolOpTag);
}
else
{
proto_tree_add_text(ldap_tree, tvb, start, a.offset - start,
"%s", typestr);
}
}
start = a.offset;
if (read_length(&a, ldap_tree, hf_ldap_message_length, &opLen) != ASN1_ERR_NOERROR)
return;
if (protocolOpCls == ASN1_APL)
{
lcrp=ldap_match_call_response(tvb, pinfo, ldap_tree, ldap_info, messageId, protocolOpTag);
if(lcrp){
tap_queue_packet(ldap_tap, pinfo, lcrp);
}
/*
* XXX - we should check for errors from these routines (and they
* should return errors), and not try to dissect the LDAP controls
* if they get an error.
*/
switch (protocolOpTag)
{
case LDAP_REQ_BIND:
dissect_ldap_request_bind(&a, ldap_tree, tvb, pinfo, ldap_info);
break;
case LDAP_REQ_UNBIND:
/* Nothing to dissect */
break;
case LDAP_REQ_SEARCH:
dissect_ldap_request_search(&a, ldap_tree, pinfo);
break;
case LDAP_REQ_MODIFY:
dissect_ldap_request_modify(&a, ldap_tree);
break;
case LDAP_REQ_ADD:
dissect_ldap_request_add(&a, ldap_tree, pinfo);
break;
case LDAP_REQ_DELETE:
dissect_ldap_request_delete(&a, ldap_tree, start, opLen);
break;
case LDAP_REQ_MODRDN:
dissect_ldap_request_modifyrdn(&a, ldap_tree, opLen);
break;
case LDAP_REQ_COMPARE:
dissect_ldap_request_compare(&a, ldap_tree);
break;
case LDAP_REQ_ABANDON:
dissect_ldap_request_abandon(&a, ldap_tree, start, opLen);
break;
case LDAP_RES_BIND:
dissect_ldap_response_bind(&a, ldap_tree, start, opLen, tvb, pinfo, ldap_info);
break;
case LDAP_RES_SEARCH_ENTRY: {
/*
* XXX - this assumes that the LDAP_RES_SEARCH_ENTRY and
* LDAP_RES_SEARCH_RESULT appear in the same frame.
*/
guint32 *num_results = p_get_proto_data(pinfo->fd, proto_ldap);
if (!num_results) {
num_results = g_malloc(sizeof(guint32));
*num_results = 0;
p_add_proto_data(pinfo->fd, proto_ldap, num_results);
}
*num_results += 1;
dissect_ldap_response_search_entry(&a, ldap_tree, is_mscldap);
break;
}
case LDAP_RES_SEARCH_REF:
dissect_ldap_response_search_ref(&a, ldap_tree);
break;
case LDAP_RES_SEARCH_RESULT: {
guint32 *num_results = p_get_proto_data(pinfo->fd, proto_ldap);
if (num_results) {
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", %d result%s",
*num_results, *num_results == 1 ? "" : "s");
g_free(num_results);
p_rem_proto_data(pinfo->fd, proto_ldap);
}
dissect_ldap_result(&a, ldap_tree, pinfo);
break;
}
case LDAP_RES_MODIFY:
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODRDN:
case LDAP_RES_COMPARE:
dissect_ldap_result(&a, ldap_tree, pinfo);
break;
default:
if (ldap_tree)
{
proto_tree_add_text(ldap_tree, a.tvb, a.offset, opLen,
"Unknown LDAP operation (%u)", protocolOpTag);
}
break;
}
}
if ((int)messageLength > 0 && (message_id_start + (int)messageLength) > a.offset) {
dissect_ldap_controls(&a, ldap_tree);
}
/*
* XXX - what if "next_offset" is past the offset of the next top-level
* sequence? Show that as an error?
*/
asn1_close(&a, &next_offset); /* XXX - use the new value of next_offset? */
}
static void
dissect_ldap_payload(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree, ldap_conv_info_t *ldap_info,
gboolean rest_is_pad, gboolean is_mscldap)
{
int offset = 0;
gboolean first_time = TRUE;
guint length_remaining;
ASN1_SCK a;
int ret;
guint msg_len = 0;
int messageOffset = 0;
guint headerLength = 0;
guint length = 0;
tvbuff_t *msg_tvb = NULL;
proto_item *msg_item = NULL;
proto_tree *msg_tree = NULL;
while (tvb_reported_length_remaining(tvb, offset) > 0) {
/*
* This will throw an exception if we don't have any data left.
* That's what we want. (See "tcp_dissect_pdus()", which is
* similar)
*/
length_remaining = tvb_ensure_length_remaining(tvb, offset);
if (rest_is_pad && length_remaining < 6) return;
/*
* The frame begins
* with a "Sequence Of" header.
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes - is the "Sequence Of" header split across segment
* boundaries? We require at least 6 bytes for the header
* which allows for a 4 byte length (ASN.1 BER).
*/
if (length_remaining < 6) {
/* stop if the caller says that we are given all data and the rest is padding
* this is for the SASL GSSAPI case when the data is only signed and not sealed
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = 6 - length_remaining;
return;
}
}
/*
* OK, try to read the "Sequence Of" header; this gets the total
* length of the LDAP message.
*/
asn1_open(&a, tvb, offset);
ret = read_sequence(&a, &msg_len);
asn1_close(&a, &messageOffset);
if (ret == ASN1_ERR_NOERROR) {
/*
* Add the length of the "Sequence Of" header to the message
* length.
*/
headerLength = messageOffset - offset;
msg_len += headerLength;
if (msg_len < headerLength) {
/*
* The message length was probably so large that the total length
* overflowed.
*
* Report this as an error.
*/
show_reported_bounds_error(tvb, pinfo, tree);
return;
}
} else {
/*
* We couldn't parse the header; just make it the amount of data
* remaining in the tvbuff, so we'll give up on this segment
* after attempting to parse the message - there's nothing more
* we can do. "dissect_ldap_message()" will display the error.
*/
msg_len = length_remaining;
}
/*
* Is the message split across segment boundaries?
*/
if (length_remaining < msg_len) {
/* provide a hint to TCP where the next PDU starts */
pinfo->want_pdu_tracking=2;
pinfo->bytes_until_next_pdu= msg_len - length_remaining;
/*
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes. Tell the TCP dissector where the data for this message
* starts in the data it handed us, and how many more bytes
* we need, and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = msg_len - length_remaining;
return;
}
}
/*
* Construct a tvbuff containing the amount of the payload we have
* available. Make its reported length the amount of data in the
* LDAP message.
*
* XXX - if reassembly isn't enabled. the subdissector will throw a
* BoundsError exception, rather than a ReportedBoundsError exception.
* We really want a tvbuff where the length is "length", the reported
* length is "plen", and the "if the snapshot length were infinite"
* length is the minimum of the reported length of the tvbuff handed
* to us and "plen", with a new type of exception thrown if the offset
* is within the reported length but beyond that third length, with
* that exception getting the "Unreassembled Packet" error.
*/
length = length_remaining;
if (length > msg_len) length = msg_len;
msg_tvb = tvb_new_subset(tvb, offset, length, msg_len);
/*
* Now dissect the LDAP message.
*/
if (tree) {
msg_item = proto_tree_add_text(tree, msg_tvb, 0, msg_len, "LDAP Message");
msg_tree = proto_item_add_subtree(msg_item, ett_ldap_msg);
}
dissect_ldap_message(msg_tvb, 0, pinfo, msg_tree, msg_item, first_time, ldap_info, is_mscldap);
offset += msg_len;
first_time = FALSE;
}
}
static void
dissect_ldap_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean is_mscldap)
{
int offset = 0;
conversation_t *conversation;
gboolean doing_sasl_security = FALSE;
guint length_remaining;
ldap_conv_info_t *ldap_info = NULL;
proto_item *ldap_item = NULL;
proto_tree *ldap_tree = NULL;
/*
* Do we have a conversation for this connection?
*/
conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
pinfo->ptype, pinfo->srcport,
pinfo->destport, 0);
if (conversation == NULL) {
/* We don't yet have a conversation, so create one. */
conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
pinfo->ptype, pinfo->srcport,
pinfo->destport, 0);
}
/*
* Do we already have a type and mechanism?
*/
ldap_info = conversation_get_proto_data(conversation, proto_ldap);
if (ldap_info == NULL) {
/* No. Attach that information to the conversation, and add
* it to the list of information structures.
*/
ldap_info = se_alloc(sizeof(ldap_conv_info_t));
ldap_info->auth_type = 0;
ldap_info->auth_mech = 0;
ldap_info->first_auth_frame = 0;
ldap_info->matched=g_hash_table_new(ldap_info_hash_matched, ldap_info_equal_matched);
ldap_info->unmatched=g_hash_table_new(ldap_info_hash_unmatched, ldap_info_equal_unmatched);
conversation_add_proto_data(conversation, proto_ldap, ldap_info);
ldap_info->next = ldap_info_items;
ldap_info_items = ldap_info;
}
switch (ldap_info->auth_type) {
case LDAP_AUTH_SASL:
/*
* It's SASL; are we using a security layer?
*/
if (ldap_info->first_auth_frame != 0 &&
pinfo->fd->num >= ldap_info->first_auth_frame) {
doing_sasl_security = TRUE; /* yes */
}
}
while (tvb_reported_length_remaining(tvb, offset) > 0) {
/*
* This will throw an exception if we don't have any data left.
* That's what we want. (See "tcp_dissect_pdus()", which is
* similar, but doesn't have to deal with the SASL issues.
* XXX - can we make "tcp_dissect_pdus()" provide enough information
* to the "get_pdu_len" routine so that we could have one dealing
* with the SASL issues, have that routine deal with SASL and
* ASN.1, and just use "tcp_dissect_pdus()"?)
*/
length_remaining = tvb_ensure_length_remaining(tvb, offset);
/*
* Try to find out if we have a plain LDAP buffer
* with a "Sequence Of" header or a SASL buffer with
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes - is the "Sequence Of" header split across segment
* boundaries? We require at least 6 bytes for the header
* which allows for a 4 byte length (ASN.1 BER).
* For the SASL case we need at least 4 bytes, so this is
* no problem here because we check for 6 bytes ans sasl buffers
* with less than 2 bytes should not exist...
*/
if (length_remaining < 6) {
pinfo->desegment_offset = offset;
pinfo->desegment_len = 6 - length_remaining;
return;
}
}
/* It might still be a packet containing a SASL security layer
* but its just that we never saw the BIND packet.
* check if it looks like it could be a SASL blob here
* and in that case just assume it is GSS-SPNEGO
*/
if(!doing_sasl_security && (tvb_bytes_exist(tvb, offset, 5))
&&(tvb_get_ntohl(tvb, offset)<=(guint)(tvb_reported_length_remaining(tvb, offset)-4))
&&(tvb_get_guint8(tvb, offset+4)==0x60) ){
ldap_info->auth_type=LDAP_AUTH_SASL;
ldap_info->first_auth_frame=pinfo->fd->num;
ldap_info->auth_mech=g_strdup("GSS-SPNEGO");
doing_sasl_security=TRUE;
}
/*
* This is the first PDU, set the Protocol column and clear the
* Info column.
*/
if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, pinfo->current_proto);
if (check_col(pinfo->cinfo, COL_INFO)) col_clear(pinfo->cinfo, COL_INFO);
ldap_item = proto_tree_add_item(tree, proto_ldap, tvb, 0, -1, FALSE);
ldap_tree = proto_item_add_subtree(ldap_item, ett_ldap);
/*
* Might we be doing a SASL security layer and, if so, *are* we doing
* one?
*
* Just because we've seen a bind reply for SASL, that doesn't mean
* that we're using a SASL security layer; I've seen captures in
* which some SASL negotiations lead to a security layer being used
* and other negotiations don't, and it's not obvious what's different
* in the two negotiations. Therefore, we assume that if the first
* byte is 0, it's a length for a SASL security layer (that way, we
* never reassemble more than 16 megabytes, protecting us from
* chewing up *too* much memory), and otherwise that it's an LDAP
* message (actually, if it's an LDAP message it should begin with 0x30,
* but we want to parse garbage as LDAP messages rather than really
* huge lengths).
*/
if (doing_sasl_security && tvb_get_guint8(tvb, offset) == 0) {
proto_item *sasl_item = NULL;
proto_tree *sasl_tree = NULL;
tvbuff_t *sasl_tvb;
guint sasl_len, sasl_msg_len, length;
/*
* Yes. The frame begins with a 4-byte big-endian length.
* And we know we have at least 6 bytes
*/
/*
* Get the SASL length, which is the length of data in the buffer
* following the length (i.e., it's 4 less than the total length).
*
* XXX - do we need to reassemble buffers? For now, we
* assume that each LDAP message is entirely contained within
* a buffer.
*/
sasl_len = tvb_get_ntohl(tvb, offset);
sasl_msg_len = sasl_len + 4;
if (sasl_msg_len < 4) {
/*
* The message length was probably so large that the total length
* overflowed.
*
* Report this as an error.
*/
show_reported_bounds_error(tvb, pinfo, tree);
return;
}
/*
* Is the buffer split across segment boundaries?
*/
if (length_remaining < sasl_msg_len) {
/* provide a hint to TCP where the next PDU starts */
pinfo->want_pdu_tracking = 2;
pinfo->bytes_until_next_pdu= sasl_msg_len - length_remaining;
/*
* Can we do reassembly?
*/
if (ldap_desegment && pinfo->can_desegment) {
/*
* Yes. Tell the TCP dissector where the data for this message
* starts in the data it handed us, and how many more bytes we
* need, and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = sasl_msg_len - length_remaining;
return;
}
}
/*
* Construct a tvbuff containing the amount of the payload we have
* available. Make its reported length the amount of data in the PDU.
*
* XXX - if reassembly isn't enabled. the subdissector will throw a
* BoundsError exception, rather than a ReportedBoundsError exception.
* We really want a tvbuff where the length is "length", the reported
* length is "plen", and the "if the snapshot length were infinite"
* length is the minimum of the reported length of the tvbuff handed
* to us and "plen", with a new type of exception thrown if the offset
* is within the reported length but beyond that third length, with
* that exception getting the "Unreassembled Packet" error.
*/
length = length_remaining;
if (length > sasl_msg_len) length = sasl_msg_len;
sasl_tvb = tvb_new_subset(tvb, offset, length, sasl_msg_len);
if (ldap_tree) {
proto_tree_add_uint(ldap_tree, hf_ldap_sasl_buffer_length, sasl_tvb, 0, 4,
sasl_len);
sasl_item = proto_tree_add_text(ldap_tree, sasl_tvb, 0, sasl_msg_len, "SASL buffer");
sasl_tree = proto_item_add_subtree(sasl_item, ett_ldap_sasl_blob);
}
if (ldap_info->auth_mech != NULL &&
strcmp(ldap_info->auth_mech, "GSS-SPNEGO") == 0) {
tvbuff_t *gssapi_tvb, *plain_tvb = NULL, *decr_tvb= NULL;
int ver_len;
int length;
/*
* This is GSS-API (using SPNEGO, but we should be done with
* the negotiation by now).
*
* Dissect the GSS_Wrap() token; it'll return the length of
* the token, from which we compute the offset in the tvbuff at
* which the plaintext data, i.e. the LDAP message, begins.
*/
length = tvb_length_remaining(sasl_tvb, 4);
if ((guint)length > sasl_len)
length = sasl_len;
gssapi_tvb = tvb_new_subset(sasl_tvb, 4, length, sasl_len);
/* Attempt decryption of the GSSAPI wrapped data if possible */
pinfo->decrypt_gssapi_tvb=DECRYPT_GSSAPI_NORMAL;
pinfo->gssapi_wrap_tvb=NULL;
pinfo->gssapi_encrypted_tvb=NULL;
pinfo->gssapi_decrypted_tvb=NULL;
ver_len = call_dissector(gssapi_wrap_handle, gssapi_tvb, pinfo, sasl_tree);
/* if we could unwrap, do a tvb shuffle */
if(pinfo->gssapi_decrypted_tvb){
decr_tvb=pinfo->gssapi_decrypted_tvb;
}
/* tidy up */
pinfo->decrypt_gssapi_tvb=0;
pinfo->gssapi_wrap_tvb=NULL;
pinfo->gssapi_encrypted_tvb=NULL;
pinfo->gssapi_decrypted_tvb=NULL;
/*
* if len is 0 it probably mean that we got a PDU that is not
* aligned to the start of the segment.
*/
if(ver_len==0){
return;
}
/*
* if we don't have unwrapped data,
* see if the wrapping involved encryption of the
* data; if not, just use the plaintext data.
*/
if (!decr_tvb) {
if(!pinfo->gssapi_data_encrypted){
plain_tvb = tvb_new_subset(gssapi_tvb, ver_len, -1, -1);
}
}
if (decr_tvb) {
proto_item *enc_item = NULL;
proto_tree *enc_tree = NULL;
/*
* The LDAP message was encrypted in the packet, and has
* been decrypted; dissect the decrypted LDAP message.
*/
if (sasl_tree) {
enc_item = proto_tree_add_text(sasl_tree, gssapi_tvb, ver_len, -1,
"GSS-API Encrypted payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
enc_tree = proto_item_add_subtree(enc_item, ett_ldap_payload);
}
dissect_ldap_payload(decr_tvb, pinfo, enc_tree, ldap_info, TRUE, is_mscldap);
} else if (plain_tvb) {
proto_item *plain_item = NULL;
proto_tree *plain_tree = NULL;
/*
* The LDAP message wasn't encrypted in the packet;
* dissect the plain LDAP message.
*/
if (sasl_tree) {
plain_item = proto_tree_add_text(sasl_tree, gssapi_tvb, ver_len, -1,
"GSS-API payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
plain_tree = proto_item_add_subtree(plain_item, ett_ldap_payload);
}
dissect_ldap_payload(plain_tvb, pinfo, plain_tree, ldap_info, TRUE, is_mscldap);
} else {
/*
* The LDAP message was encrypted in the packet, and was
* not decrypted; just show it as encrypted data.
*/
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "LDAP GSS-API Encrypted payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
}
if (sasl_tree) {
proto_tree_add_text(sasl_tree, gssapi_tvb, ver_len, -1,
"GSS-API Encrypted payload (%d byte%s)",
sasl_len - ver_len,
plurality(sasl_len - ver_len, "", "s"));
}
}
}
offset += sasl_msg_len;
} else {
/* plain LDAP, so dissect the payload */
dissect_ldap_payload(tvb, pinfo, ldap_tree, ldap_info, FALSE, is_mscldap);
/* dissect_ldap_payload() has it's own loop so go out here */
break;
}
}
}
static void
dissect_ldap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_ldap_pdu(tvb, pinfo, tree, FALSE);
return;
}
static void
dissect_mscldap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_ldap_pdu(tvb, pinfo, tree, TRUE);
return;
}
static void
ldap_reinit(void)
{
ldap_conv_info_t *ldap_info;
/* Free up state attached to the ldap_info structures */
for (ldap_info = ldap_info_items; ldap_info != NULL; ldap_info = ldap_info->next) {
if (ldap_info->auth_mech != NULL) {
g_free(ldap_info->auth_mech);
ldap_info->auth_mech=NULL;
}
g_hash_table_destroy(ldap_info->matched);
ldap_info->matched=NULL;
g_hash_table_destroy(ldap_info->unmatched);
ldap_info->unmatched=NULL;
}
ldap_info_items = NULL;
}
void
proto_register_ldap(void)
{
static value_string auth_types[] = {
{LDAP_AUTH_SIMPLE, "Simple"},
{LDAP_AUTH_KRBV4LDAP, "Kerberos V4 to the LDAP server"},
{LDAP_AUTH_KRBV4DSA, "Kerberos V4 to the DSA"},
{LDAP_AUTH_SASL, "SASL"},
{0, NULL},
};
static value_string search_scope[] = {
{0x00, "Base"},
{0x01, "Single"},
{0x02, "Subtree"},
{0x00, NULL},
};
static value_string search_dereference[] = {
{0x00, "Never"},
{0x01, "Searching"},
{0x02, "Base Object"},
{0x03, "Always"},
{0x00, NULL},
};
static hf_register_info hf[] = {
{ &hf_ldap_response_in,
{ "Response In", "ldap.response_in",
FT_FRAMENUM, BASE_DEC, NULL, 0x0,
"The response to this packet is in this frame", HFILL }},
{ &hf_ldap_response_to,
{ "Response To", "ldap.response_to",
FT_FRAMENUM, BASE_DEC, NULL, 0x0,
"This is a response to the LDAP command in this frame", HFILL }},
{ &hf_ldap_time,
{ "Time", "ldap.time",
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
"The time between the Call and the Reply", HFILL }},
{ &hf_ldap_sasl_buffer_length,
{ "SASL Buffer Length", "ldap.sasl_buffer_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"SASL Buffer Length", HFILL }},
{ &hf_ldap_length,
{ "Length", "ldap.length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Length", HFILL }},
{ &hf_ldap_message_id,
{ "Message Id", "ldap.message_id",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Message Id", HFILL }},
{ &hf_ldap_message_type,
{ "Message Type", "ldap.message_type",
FT_UINT8, BASE_HEX, &msgTypes, 0x0,
"LDAP Message Type", HFILL }},
{ &hf_ldap_message_length,
{ "Message Length", "ldap.message_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Message Length", HFILL }},
{ &hf_ldap_message_result,
{ "Result Code", "ldap.result.code",
FT_UINT8, BASE_HEX, VALS(LDAPResultCode_vals), 0x0,
"LDAP Result Code", HFILL }},
{ &hf_ldap_message_result_matcheddn,
{ "Matched DN", "ldap.result.matcheddn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Result Matched DN", HFILL }},
{ &hf_ldap_message_result_errormsg,
{ "Error Message", "ldap.result.errormsg",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Result Error Message", HFILL }},
{ &hf_ldap_message_result_referral,
{ "Referral", "ldap.result.referral",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Result Referral URL", HFILL }},
{ &hf_ldap_message_bind_version,
{ "Version", "ldap.bind.version",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Bind Version", HFILL }},
{ &hf_ldap_message_bind_dn,
{ "DN", "ldap.bind.dn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Bind Distinguished Name", HFILL }},
{ &hf_ldap_message_bind_auth,
{ "Auth Type", "ldap.bind.auth_type",
FT_UINT8, BASE_HEX, auth_types, 0x0,
"LDAP Bind Auth Type", HFILL }},
{ &hf_ldap_message_bind_auth_password,
{ "Password", "ldap.bind.password",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Bind Password", HFILL }},
{ &hf_ldap_message_bind_auth_mechanism,
{ "Mechanism", "ldap.bind.mechanism",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Bind Mechanism", HFILL }},
{ &hf_ldap_message_bind_auth_credentials,
{ "Credentials", "ldap.bind.credentials",
FT_BYTES, BASE_NONE, NULL, 0x0,
"LDAP Bind Credentials", HFILL }},
{ &hf_ldap_message_bind_server_credentials,
{ "Server Credentials", "ldap.bind.server_credentials",
FT_BYTES, BASE_NONE, NULL, 0x0,
"LDAP Bind Server Credentials", HFILL }},
{ &hf_ldap_message_search_base,
{ "Base DN", "ldap.search.basedn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Search Base Distinguished Name", HFILL }},
{ &hf_ldap_message_search_scope,
{ "Scope", "ldap.search.scope",
FT_UINT8, BASE_HEX, search_scope, 0x0,
"LDAP Search Scope", HFILL }},
{ &hf_ldap_message_search_deref,
{ "Dereference", "ldap.search.dereference",
FT_UINT8, BASE_HEX, search_dereference, 0x0,
"LDAP Search Dereference", HFILL }},
{ &hf_ldap_message_search_sizeLimit,
{ "Size Limit", "ldap.search.sizelimit",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Search Size Limit", HFILL }},
{ &hf_ldap_message_search_timeLimit,
{ "Time Limit", "ldap.search.timelimit",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Search Time Limit", HFILL }},
{ &hf_ldap_message_search_typesOnly,
{ "Attributes Only", "ldap.search.typesonly",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"LDAP Search Attributes Only", HFILL }},
{ &hf_ldap_message_search_filter,
{ "Filter", "ldap.search.filter",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Search Filter", HFILL }},
{ &hf_ldap_message_search_reference,
{ "Reference URL", "ldap.search.reference",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Search Reference URL", HFILL }},
{ &hf_ldap_message_dn,
{ "Distinguished Name", "ldap.dn",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Distinguished Name", HFILL }},
{ &hf_ldap_message_attribute,
{ "Attribute", "ldap.attribute",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Attribute", HFILL }},
/*
* XXX - not all LDAP values are text strings; we'd need a file
* describing which values (by name) are text strings and which are
* binary.
*
* Some values that are, at least in Microsoft's schema, binary
* are:
*
* invocationId
* nTSecurityDescriptor
* objectGUID
*/
{ &hf_ldap_message_value,
{ "Value", "ldap.value",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Value", HFILL }},
{ &hf_ldap_message_modrdn_name,
{ "New Name", "ldap.modrdn.name",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP New Name", HFILL }},
{ &hf_ldap_message_modrdn_delete,
{ "Delete Values", "ldap.modrdn.delete",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"LDAP Modify RDN - Delete original values", HFILL }},
{ &hf_ldap_message_modrdn_superior,
{ "New Location", "ldap.modrdn.superior",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Modify RDN - New Location", HFILL }},
{ &hf_ldap_message_compare,
{ "Test", "ldap.compare.test",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Compare Test", HFILL }},
{ &hf_ldap_message_modify_add,
{ "Add", "ldap.modify.add",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Add", HFILL }},
{ &hf_ldap_message_modify_replace,
{ "Replace", "ldap.modify.replace",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Replace", HFILL }},
{ &hf_ldap_message_modify_delete,
{ "Delete", "ldap.modify.delete",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Delete", HFILL }},
{ &hf_ldap_message_abandon_msgid,
{ "Abandon Msg Id", "ldap.abandon.msgid",
FT_UINT32, BASE_DEC, NULL, 0x0,
"LDAP Abandon Msg Id", HFILL }},
{ &hf_ldap_message_controls_oid,
{ "Control OID", "ldap.controls.oid",
FT_STRING, BASE_NONE, NULL, 0x0,
"LDAP Control OID", HFILL }},
{ &hf_ldap_message_controls_critical,
{ "Control Critical", "ldap.controls.critical",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"LDAP Control Critical", HFILL }},
{ &hf_ldap_message_controls_value,
{ "Control Value", "ldap.controls.value",
FT_BYTES, BASE_NONE, NULL, 0x0,
"LDAP Control Value", HFILL }},
{ &hf_mscldap_netlogon_type,
{ "Type", "mscldap.netlogon.type",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Type of <please tell ethereal developers what this type is>", HFILL }},
{ &hf_mscldap_netlogon_version,
{ "Version", "mscldap.netlogon.version",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Version of <please tell ethereal developers what this type is>", HFILL }},
{ &hf_mscldap_netlogon_lm_token,
{ "LM Token", "mscldap.netlogon.lm_token",
FT_UINT16, BASE_HEX, NULL, 0x0,
"LM Token", HFILL }},
{ &hf_mscldap_netlogon_nt_token,
{ "NT Token", "mscldap.netlogon.nt_token",
FT_UINT16, BASE_HEX, NULL, 0x0,
"NT Token", HFILL }},
{ &hf_mscldap_netlogon_flags,
{ "Flags", "mscldap.netlogon.flags",
FT_UINT32, BASE_HEX, NULL, 0x0,
"Netlogon flags describing the DC properties", HFILL }},
{ &hf_mscldap_domain_guid,
{ "Domain GUID", "mscldap.domain.guid",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Domain GUID", HFILL }},
{ &hf_mscldap_forest,
{ "Forest", "mscldap.forest",
FT_STRING, BASE_NONE, NULL, 0x0,
"Forest", HFILL }},
{ &hf_mscldap_domain,
{ "Domain", "mscldap.domain",
FT_STRING, BASE_NONE, NULL, 0x0,
"Domainname", HFILL }},
{ &hf_mscldap_hostname,
{ "Hostname", "mscldap.hostname",
FT_STRING, BASE_NONE, NULL, 0x0,
"Hostname", HFILL }},
{ &hf_mscldap_nb_domain,
{ "NetBios Domain", "mscldap.nb_domain",
FT_STRING, BASE_NONE, NULL, 0x0,
"NetBios Domainname", HFILL }},
{ &hf_mscldap_nb_hostname,
{ "NetBios Hostname", "mscldap.nb_hostname",
FT_STRING, BASE_NONE, NULL, 0x0,
"NetBios Hostname", HFILL }},
{ &hf_mscldap_username,
{ "User", "mscldap.username",
FT_STRING, BASE_NONE, NULL, 0x0,
"User name", HFILL }},
{ &hf_mscldap_sitename,
{ "Site", "mscldap.sitename",
FT_STRING, BASE_NONE, NULL, 0x0,
"Site name", HFILL }},
{ &hf_mscldap_clientsitename,
{ "Client Site", "mscldap.clientsitename",
FT_STRING, BASE_NONE, NULL, 0x0,
"Client Site name", HFILL }},
{ &hf_mscldap_netlogon_flags_pdc,
{ "PDC", "mscldap.netlogon.flags.pdc", FT_BOOLEAN, 32,
TFS(&tfs_ads_pdc), 0x00000001, "Is this DC a PDC or not?", HFILL }},
{ &hf_mscldap_netlogon_flags_gc,
{ "GC", "mscldap.netlogon.flags.gc", FT_BOOLEAN, 32,
TFS(&tfs_ads_gc), 0x00000004, "Does this dc service as a GLOBAL CATALOGUE?", HFILL }},
{ &hf_mscldap_netlogon_flags_ldap,
{ "LDAP", "mscldap.netlogon.flags.ldap", FT_BOOLEAN, 32,
TFS(&tfs_ads_ldap), 0x00000008, "Does this DC act as an LDAP server?", HFILL }},
{ &hf_mscldap_netlogon_flags_ds,
{ "DS", "mscldap.netlogon.flags.ds", FT_BOOLEAN, 32,
TFS(&tfs_ads_ds), 0x00000010, "Does this dc provide DS services?", HFILL }},
{ &hf_mscldap_netlogon_flags_kdc,
{ "KDC", "mscldap.netlogon.flags.kdc", FT_BOOLEAN, 32,
TFS(&tfs_ads_kdc), 0x00000020, "Does this dc act as a KDC?", HFILL }},
{ &hf_mscldap_netlogon_flags_timeserv,
{ "Time Serv", "mscldap.netlogon.flags.timeserv", FT_BOOLEAN, 32,
TFS(&tfs_ads_timeserv), 0x00000040, "Does this dc provide time services (ntp) ?", HFILL }},
{ &hf_mscldap_netlogon_flags_closest,
{ "Closest", "mscldap.netlogon.flags.closest", FT_BOOLEAN, 32,
TFS(&tfs_ads_closest), 0x00000080, "Is this the closest dc? (is this used at all?)", HFILL }},
{ &hf_mscldap_netlogon_flags_writable,
{ "Writable", "mscldap.netlogon.flags.writable", FT_BOOLEAN, 32,
TFS(&tfs_ads_writable), 0x00000100, "Is this dc writable? (i.e. can it update the AD?)", HFILL }},
{ &hf_mscldap_netlogon_flags_good_timeserv,
{ "Good Time Serv", "mscldap.netlogon.flags.good_timeserv", FT_BOOLEAN, 32,
TFS(&tfs_ads_good_timeserv), 0x00000200, "Is this a Good Time Server? (i.e. does it have a hardware clock)", HFILL }},
{ &hf_mscldap_netlogon_flags_ndnc,
{ "NDNC", "mscldap.netlogon.flags.ndnc", FT_BOOLEAN, 32,
TFS(&tfs_ads_ndnc), 0x00000400, "Is this an NDNC dc?", HFILL }},
};
static gint *ett[] = {
&ett_ldap,
&ett_ldap_msg,
&ett_ldap_payload,
&ett_ldap_sasl_blob,
&ett_ldap_referrals,
&ett_ldap_attribute,
&ett_ldap_controls,
&ett_ldap_control,
&ett_mscldap_netlogon_flags
};
module_t *ldap_module;
proto_ldap = proto_register_protocol("Lightweight Directory Access Protocol",
"LDAP", "ldap");
proto_register_field_array(proto_ldap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
ldap_module = prefs_register_protocol(proto_ldap, NULL);
prefs_register_bool_preference(ldap_module, "desegment_ldap_messages",
"Reassemble LDAP messages spanning multiple TCP segments",
"Whether the LDAP dissector should reassemble messages spanning multiple TCP segments."
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
&ldap_desegment);
proto_cldap = proto_register_protocol(
"Connectionless Lightweight Directory Access Protocol",
"CLDAP", "cldap");
register_init_routine(ldap_reinit);
ldap_tap=register_tap("ldap");
}
void
proto_reg_handoff_ldap(void)
{
dissector_handle_t ldap_handle, cldap_handle;
ldap_handle = create_dissector_handle(dissect_ldap, proto_ldap);
dissector_add("tcp.port", TCP_PORT_LDAP, ldap_handle);
dissector_add("tcp.port", TCP_PORT_GLOBALCAT_LDAP, ldap_handle);
cldap_handle = create_dissector_handle(dissect_mscldap, proto_cldap);
dissector_add("udp.port", UDP_PORT_CLDAP, cldap_handle);
gssapi_handle = find_dissector("gssapi");
gssapi_wrap_handle = find_dissector("gssapi_verf");
/* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dsml/dsml/ldap_controls_and_session_support.asp */
register_ber_oid_name("1.2.840.113556.1.4.319","LDAP_PAGED_RESULT_OID_STRING");
register_ber_oid_name("1.2.840.113556.1.4.417","LDAP_SERVER_SHOW_DELETED_OID");
register_ber_oid_name("1.2.840.113556.1.4.473","LDAP_SERVER_SORT_OID");
register_ber_oid_name("1.2.840.113556.1.4.521","LDAP_SERVER_CROSSDOM_MOVE_TARGET_OID");
register_ber_oid_name("1.2.840.113556.1.4.528","LDAP_SERVER_NOTIFICATION_OID");
register_ber_oid_name("1.2.840.113556.1.4.529","LDAP_SERVER_EXTENDED_DN_OID");
register_ber_oid_name("1.2.840.113556.1.4.619","LDAP_SERVER_LAZY_COMMIT_OID");
register_ber_oid_name("1.2.840.113556.1.4.801","LDAP_SERVER_SD_FLAGS_OID");
register_ber_oid_name("1.2.840.113556.1.4.805","LDAP_SERVER_TREE_DELETE_OID");
register_ber_oid_name("1.2.840.113556.1.4.841","LDAP_SERVER_DIRSYNC_OID");
register_ber_oid_name("1.2.840.113556.1.4.970 ","None");
register_ber_oid_name("1.2.840.113556.1.4.1338","LDAP_SERVER_VERIFY_NAME_OID");
register_ber_oid_name("1.2.840.113556.1.4.1339","LDAP_SERVER_DOMAIN_SCOPE_OID");
register_ber_oid_name("1.2.840.113556.1.4.1340","LDAP_SERVER_SEARCH_OPTIONS_OID");
register_ber_oid_name("1.2.840.113556.1.4.1413","LDAP_SERVER_PERMISSIVE_MODIFY_OID");
register_ber_oid_name("1.2.840.113556.1.4.1504","LDAP_SERVER_ASQ_OID");
register_ber_oid_name("1.2.840.113556.1.4.1781","LDAP_SERVER_FAST_BIND_OID");
register_ber_oid_name("1.3.6.1.4.1.1466.101.119.1","None");
register_ber_oid_name("1.3.6.1.4.1.1466.20037","LDAP_START_TLS_OID");
register_ber_oid_name("2.16.840.1.113730.3.4.9","LDAP_CONTROL_VLVREQUEST VLV");
}
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