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wireshark/asn1/kerberos/packet-kerberos-template.c

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/* packet-kerberos.c
* Routines for Kerberos
* Wes Hardaker (c) 2000
* wjhardaker@ucdavis.edu
* Richard Sharpe (C) 2002, rsharpe@samba.org, modularized a bit more and
* added AP-REQ and AP-REP dissection
*
* Ronnie Sahlberg (C) 2004, major rewrite for new ASN.1/BER API.
* decryption of kerberos blobs if keytab is provided
*
* See RFC 1510, and various I-Ds and other documents showing additions,
* e.g. ones listed under
*
* http://www.isi.edu/people/bcn/krb-revisions/
*
* and
*
* http://www.ietf.org/internet-drafts/draft-ietf-krb-wg-kerberos-clarifications-07.txt
*
* and
*
* http://www.ietf.org/internet-drafts/draft-ietf-krb-wg-kerberos-referrals-05.txt
*
* Some structures from RFC2630
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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.
*/
/*
* Some of the development of the Kerberos protocol decoder was sponsored by
* Cable Television Laboratories, Inc. ("CableLabs") based upon proprietary
* CableLabs' specifications. Your license and use of this protocol decoder
* does not mean that you are licensed to use the CableLabs'
* specifications. If you have questions about this protocol, contact
* jf.mule [AT] cablelabs.com or c.stuart [AT] cablelabs.com for additional
* information.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <ctype.h>
#ifdef HAVE_LIBNETTLE
#define HAVE_KERBEROS
#ifdef _WIN32
#include <des.h>
#include <cbc.h>
#else
#include <nettle/des.h>
#include <nettle/cbc.h>
#endif
#include <epan/crypt/crypt-md5.h>
#include <sys/stat.h> /* For keyfile manipulation */
#endif
#include <wsutil/file_util.h>
#include <epan/packet.h>
#include <epan/strutil.h>
#include <epan/conversation.h>
#include <epan/emem.h>
#include <epan/oids.h>
#include <epan/asn1.h>
#include <epan/prefs.h>
#include <epan/dissectors/packet-kerberos.h>
#include <epan/dissectors/packet-netbios.h>
#include <epan/dissectors/packet-tcp.h>
#include <epan/dissectors/packet-ber.h>
#include <epan/dissectors/packet-per.h>
#include <epan/dissectors/packet-pkinit.h>
#include <epan/dissectors/packet-cms.h>
#include <epan/dissectors/packet-windows-common.h>
#include <epan/dissectors/packet-dcerpc-netlogon.h>
#include <epan/dissectors/packet-dcerpc.h>
#include <epan/dissectors/packet-gssapi.h>
#define PNAME "Kerberos"
#define PSNAME "KRB5"
#define PFNAME "kerberos"
#define UDP_PORT_KERBEROS 88
#define TCP_PORT_KERBEROS 88
static dissector_handle_t kerberos_handle_udp=NULL;
/* Global variables */
static guint32 authenticator_etype;
static guint32 keytype;
guint32 krb_PA_DATA_type;
static guint32 addr_type;
guint32 krb5_errorcode;
static gboolean do_col_info;
/* Forward declarations */
static int dissect_kerberos_Applications(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
static int dissect_kerberos_PA_ENC_TIMESTAMP(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
static int dissect_kerberos_KERB_PA_PAC_REQUEST(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
static int dissect_kerberos_PA_S4U2Self(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
static int dissect_kerberos_ETYPE_INFO(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
static int dissect_kerberos_ETYPE_INFO2(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
/* Desegment Kerberos over TCP messages */
static gboolean krb_desegment = TRUE;
static gint proto_kerberos = -1;
static struct { const char *set; const char *unset; } bitval = { "Set", "Not set" };
static gint hf_krb_rm_reserved = -1;
static gint hf_krb_rm_reclen = -1;
static gint hf_krb_provsrv_location = -1;
static gint hf_krb_smb_nt_status = -1;
static gint hf_krb_smb_unknown = -1;
static gint hf_krb_address_ip = -1;
static gint hf_krb_address_netbios = -1;
static gint hf_krb_address_ipv6 = -1;
#include "packet-kerberos-hf.c"
/* Initialize the subtree pointers */
static gint ett_kerberos = -1;
static gint ett_krb_recordmark = -1;
#include "packet-kerberos-ett.c"
guint32 krb5_errorcode;
static dissector_handle_t krb4_handle=NULL;
static gboolean do_col_info;
static void
call_kerberos_callbacks(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int tag)
{
kerberos_callbacks *cb=(kerberos_callbacks *)pinfo->private_data;
if(!cb){
return;
}
while(cb->tag){
if(cb->tag==tag){
cb->callback(pinfo, tvb, tree);
return;
}
cb++;
}
return;
}
#ifdef HAVE_KERBEROS
/* Decrypt Kerberos blobs */
gboolean krb_decrypt = FALSE;
/* keytab filename */
static const char *keytab_filename = "insert filename here";
#endif
#if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS)
#ifdef _WIN32
/* prevent redefinition warnings in kfw-2.5\inc\win_mac.h */
#undef HAVE_STDARG_H
#undef HAVE_SYS_TYPES_H
#endif
#include <krb5.h>
enc_key_t *enc_key_list=NULL;
static void
add_encryption_key(packet_info *pinfo, int keytype, int keylength, const char *keyvalue, const char *origin)
{
enc_key_t *new_key;
if(pinfo->fd->flags.visited){
return;
}
printf("added key in %u keytype:%d len:%d\n",pinfo->fd->num, keytype, keylength);
new_key=g_malloc(sizeof(enc_key_t));
g_snprintf(new_key->key_origin, KRB_MAX_ORIG_LEN, "%s learnt from frame %u",origin,pinfo->fd->num);
new_key->next=enc_key_list;
enc_key_list=new_key;
new_key->keytype=keytype;
new_key->keylength=keylength;
/*XXX this needs to be freed later */
new_key->keyvalue=g_memdup(keyvalue, keylength);
}
#endif /* HAVE_HEIMDAL_KERBEROS || HAVE_MIT_KERBEROS */
#ifdef HAVE_MIT_KERBEROS
static krb5_context krb5_ctx;
void
read_keytab_file(const char *filename)
{
krb5_keytab keytab;
krb5_error_code ret;
krb5_keytab_entry key;
krb5_kt_cursor cursor;
enc_key_t *new_key;
static int first_time=1;
printf("read keytab file %s\n", filename);
if(first_time){
first_time=0;
ret = krb5_init_context(&krb5_ctx);
if(ret){
return;
}
}
/* should use a file in the wireshark users dir */
ret = krb5_kt_resolve(krb5_ctx, filename, &keytab);
if(ret){
fprintf(stderr, "KERBEROS ERROR: Could not open keytab file :%s\n",filename);
return;
}
ret = krb5_kt_start_seq_get(krb5_ctx, keytab, &cursor);
if(ret){
fprintf(stderr, "KERBEROS ERROR: Could not read from keytab file :%s\n",filename);
return;
}
do{
new_key=g_malloc(sizeof(enc_key_t));
new_key->next=enc_key_list;
ret = krb5_kt_next_entry(krb5_ctx, keytab, &key, &cursor);
if(ret==0){
int i;
char *pos;
/* generate origin string, describing where this key came from */
pos=new_key->key_origin;
pos+=MIN(KRB_MAX_ORIG_LEN,
g_snprintf(pos, KRB_MAX_ORIG_LEN, "keytab principal "));
for(i=0;i<key.principal->length;i++){
pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin),
g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "%s%s",(i?"/":""),(key.principal->data[i]).data));
}
pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin),
g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "@%s",key.principal->realm.data));
*pos=0;
/*printf("added key for principal :%s\n", new_key->key_origin);*/
new_key->keytype=key.key.enctype;
new_key->keylength=key.key.length;
new_key->keyvalue=g_memdup(key.key.contents, key.key.length);
enc_key_list=new_key;
}
}while(ret==0);
ret = krb5_kt_end_seq_get(krb5_ctx, keytab, &cursor);
if(ret){
krb5_kt_close(krb5_ctx, keytab);
}
}
guint8 *
decrypt_krb5_data(proto_tree *tree, packet_info *pinfo,
int usage,
int length,
const guint8 *cryptotext,
int keytype,
int *datalen)
{
static int first_time=1;
krb5_error_code ret;
enc_key_t *ek;
static krb5_data data = {0,0,NULL};
krb5_keytab_entry key;
/* dont do anything if we are not attempting to decrypt data */
if(!krb_decrypt){
return NULL;
}
/* XXX we should only do this for first time, then store somewhere */
/* XXX We also need to re-read the keytab when the preference changes */
/* should this have a destroy context ? MIT people would know */
if(first_time){
first_time=0;
read_keytab_file(keytab_filename);
}
for(ek=enc_key_list;ek;ek=ek->next){
krb5_enc_data input;
/* shortcircuit and bail out if enctypes are not matching */
if((keytype != -1) && (ek->keytype != keytype)) {
continue;
}
input.enctype = ek->keytype;
input.ciphertext.length = length;
input.ciphertext.data = (guint8 *)cryptotext;
data.length = length;
g_free(data.data);
data.data = g_malloc(length);
key.key.enctype=ek->keytype;
key.key.length=ek->keylength;
key.key.contents=ek->keyvalue;
ret = krb5_c_decrypt(krb5_ctx, &(key.key), usage, 0, &input, &data);
if((ret == 0) && (length>0)){
char *user_data;
printf("woohoo decrypted keytype:%d in frame:%u\n", ek->keytype, pinfo->fd->num);
proto_tree_add_text(tree, NULL, 0, 0, "[Decrypted using: %s]", ek->key_origin);
/* return a private g_malloced blob to the caller */
user_data=g_malloc(data.length);
memcpy(user_data, data.data, data.length);
if (datalen) {
*datalen = data.length;
}
return user_data;
}
}
return NULL;
}
#elif defined(HAVE_HEIMDAL_KERBEROS)
static krb5_context krb5_ctx;
void
read_keytab_file(const char *filename)
{
krb5_keytab keytab;
krb5_error_code ret;
krb5_keytab_entry key;
krb5_kt_cursor cursor;
enc_key_t *new_key;
static int first_time=1;
if(first_time){
first_time=0;
ret = krb5_init_context(&krb5_ctx);
if(ret){
return;
}
}
/* should use a file in the wireshark users dir */
ret = krb5_kt_resolve(krb5_ctx, filename, &keytab);
if(ret){
fprintf(stderr, "KERBEROS ERROR: Could not open keytab file :%s\n",filename);
return;
}
ret = krb5_kt_start_seq_get(krb5_ctx, keytab, &cursor);
if(ret){
fprintf(stderr, "KERBEROS ERROR: Could not read from keytab file :%s\n",filename);
return;
}
do{
new_key=g_malloc(sizeof(enc_key_t));
new_key->next=enc_key_list;
ret = krb5_kt_next_entry(krb5_ctx, keytab, &key, &cursor);
if(ret==0){
unsigned int i;
char *pos;
/* generate origin string, describing where this key came from */
pos=new_key->key_origin;
pos+=MIN(KRB_MAX_ORIG_LEN,
g_snprintf(pos, KRB_MAX_ORIG_LEN, "keytab principal "));
for(i=0;i<key.principal->name.name_string.len;i++){
pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin),
g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "%s%s",(i?"/":""),key.principal->name.name_string.val[i]));
}
pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin),
g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "@%s",key.principal->realm));
*pos=0;
new_key->keytype=key.keyblock.keytype;
new_key->keylength=key.keyblock.keyvalue.length;
new_key->keyvalue=g_memdup(key.keyblock.keyvalue.data, key.keyblock.keyvalue.length);
enc_key_list=new_key;
}
}while(ret==0);
ret = krb5_kt_end_seq_get(krb5_ctx, keytab, &cursor);
if(ret){
krb5_kt_close(krb5_ctx, keytab);
}
}
guint8 *
decrypt_krb5_data(proto_tree *tree, packet_info *pinfo,
int usage,
int length,
const guint8 *cryptotext,
int keytype,
int *datalen)
{
static int first_time=1;
krb5_error_code ret;
krb5_data data;
enc_key_t *ek;
/* dont do anything if we are not attempting to decrypt data */
if(!krb_decrypt){
return NULL;
}
/* XXX we should only do this for first time, then store somewhere */
/* XXX We also need to re-read the keytab when the preference changes */
/* should this have a destroy context ? Heimdal people would know */
if(first_time){
first_time=0;
read_keytab_file(keytab_filename);
}
for(ek=enc_key_list;ek;ek=ek->next){
krb5_keytab_entry key;
krb5_crypto crypto;
guint8 *cryptocopy; /* workaround for pre-0.6.1 heimdal bug */
/* shortcircuit and bail out if enctypes are not matching */
if((keytype != -1) && (ek->keytype != keytype)) {
continue;
}
key.keyblock.keytype=ek->keytype;
key.keyblock.keyvalue.length=ek->keylength;
key.keyblock.keyvalue.data=ek->keyvalue;
ret = krb5_crypto_init(krb5_ctx, &(key.keyblock), 0, &crypto);
if(ret){
return NULL;
}
/* pre-0.6.1 versions of Heimdal would sometimes change
the cryptotext data even when the decryption failed.
This would obviously not work since we iterate over the
keys. So just give it a copy of the crypto data instead.
This has been seen for RC4-HMAC blobs.
*/
cryptocopy=g_malloc(length);
memcpy(cryptocopy, cryptotext, length);
ret = krb5_decrypt_ivec(krb5_ctx, crypto, usage,
cryptocopy, length,
&data,
NULL);
g_free(cryptocopy);
if((ret == 0) && (length>0)){
char *user_data;
printf("woohoo decrypted keytype:%d in frame:%u\n", ek->keytype, pinfo->fd->num);
proto_tree_add_text(tree, NULL, 0, 0, "[Decrypted using: %s]", ek->key_origin);
krb5_crypto_destroy(krb5_ctx, crypto);
/* return a private g_malloced blob to the caller */
user_data=g_malloc(data.length);
memcpy(user_data, data.data, data.length);
if (datalen) {
*datalen = data.length;
}
return user_data;
}
krb5_crypto_destroy(krb5_ctx, crypto);
}
return NULL;
}
#elif defined (HAVE_LIBNETTLE)
#define SERVICE_KEY_SIZE (DES3_KEY_SIZE + 2)
#define KEYTYPE_DES3_CBC_MD5 5 /* Currently the only one supported */
typedef struct _service_key_t {
guint16 kvno;
int keytype;
int length;
guint8 *contents;
char origin[KRB_MAX_ORIG_LEN+1];
} service_key_t;
GSList *service_key_list = NULL;
static void
add_encryption_key(packet_info *pinfo, int keytype, int keylength, const char *keyvalue, const char *origin)
{
service_key_t *new_key;
if(pinfo->fd->flags.visited){
return;
}
printf("added key in %u\n",pinfo->fd->num);
new_key = g_malloc(sizeof(service_key_t));
new_key->kvno = 0;
new_key->keytype = keytype;
new_key->length = keylength;
new_key->contents = g_malloc(keylength);
memcpy(new_key->contents, keyvalue, keylength);
g_snprintf(new_key->origin, KRB_MAX_ORIG_LEN, "%s learnt from frame %u", origin, pinfo->fd->num);
service_key_list = g_slist_append(service_key_list, (gpointer) new_key);
}
static void
clear_keytab(void) {
GSList *ske;
service_key_t *sk;
for(ske = service_key_list; ske != NULL; ske = g_slist_next(ske)){
sk = (service_key_t *) ske->data;
if (sk) {
g_free(sk->contents);
g_free(sk);
}
}
g_slist_free(service_key_list);
service_key_list = NULL;
}
static void
read_keytab_file(const char *service_key_file)
{
FILE *skf;
struct stat st;
service_key_t *sk;
unsigned char buf[SERVICE_KEY_SIZE];
int newline_skip = 0, count = 0;
if (service_key_file != NULL && ws_stat (service_key_file, &st) == 0) {
/* The service key file contains raw 192-bit (24 byte) 3DES keys.
* There can be zero, one (\n), or two (\r\n) characters between
* keys. Trailing characters are ignored.
*/
/* XXX We should support the standard keytab format instead */
if (st.st_size > SERVICE_KEY_SIZE) {
if ( (st.st_size % (SERVICE_KEY_SIZE + 1) == 0) ||
(st.st_size % (SERVICE_KEY_SIZE + 1) == SERVICE_KEY_SIZE) ) {
newline_skip = 1;
} else if ( (st.st_size % (SERVICE_KEY_SIZE + 2) == 0) ||
(st.st_size % (SERVICE_KEY_SIZE + 2) == SERVICE_KEY_SIZE) ) {
newline_skip = 2;
}
}
skf = ws_fopen(service_key_file, "rb");
if (! skf) return;
while (fread(buf, SERVICE_KEY_SIZE, 1, skf) == 1) {
sk = g_malloc(sizeof(service_key_t));
sk->kvno = buf[0] << 8 | buf[1];
sk->keytype = KEYTYPE_DES3_CBC_MD5;
sk->length = DES3_KEY_SIZE;
sk->contents = g_malloc(DES3_KEY_SIZE);
memcpy(sk->contents, buf + 2, DES3_KEY_SIZE);
g_snprintf(sk->origin, KRB_MAX_ORIG_LEN, "3DES service key file, key #%d, offset %ld", count, ftell(skf));
service_key_list = g_slist_append(service_key_list, (gpointer) sk);
fseek(skf, newline_skip, SEEK_CUR);
count++;
g_warning("added key: %s", sk->origin);
}
fclose(skf);
}
}
#define CONFOUNDER_PLUS_CHECKSUM 24
guint8 *
decrypt_krb5_data(proto_tree *tree, packet_info *pinfo,
int _U_ usage,
int length,
const guint8 *cryptotext,
int keytype,
int *datalen)
{
tvbuff_t *encr_tvb;
guint8 *decrypted_data = NULL, *plaintext = NULL;
int res;
guint8 cls;
gboolean pc;
guint32 tag, item_len, data_len;
int id_offset, offset;
guint8 key[DES3_KEY_SIZE];
guint8 initial_vector[DES_BLOCK_SIZE];
md5_state_t md5s;
md5_byte_t digest[16];
md5_byte_t zero_fill[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
md5_byte_t confounder[8];
gboolean ind;
GSList *ske;
service_key_t *sk;
struct des3_ctx ctx;
/* dont do anything if we are not attempting to decrypt data */
if(!krb_decrypt){
return NULL;
}
if (keytype != KEYTYPE_DES3_CBC_MD5 || service_key_list == NULL) {
return NULL;
}
decrypted_data = g_malloc(length);
for(ske = service_key_list; ske != NULL; ske = g_slist_next(ske)){
gboolean do_continue = FALSE;
sk = (service_key_t *) ske->data;
des_fix_parity(DES3_KEY_SIZE, key, sk->contents);
md5_init(&md5s);
memset(initial_vector, 0, DES_BLOCK_SIZE);
res = des3_set_key(&ctx, key);
cbc_decrypt(&ctx, des3_decrypt, DES_BLOCK_SIZE, initial_vector,
length, decrypted_data, cryptotext);
encr_tvb = tvb_new_real_data(decrypted_data, length, length);
tvb_memcpy(encr_tvb, confounder, 0, 8);
/* We have to pull the decrypted data length from the decrypted
* content. If the key doesn't match or we otherwise get garbage,
* an exception may get thrown while decoding the ASN.1 header.
* Catch it, just in case.
*/
TRY {
id_offset = get_ber_identifier(encr_tvb, CONFOUNDER_PLUS_CHECKSUM, &cls, &pc, &tag);
offset = get_ber_length(encr_tvb, id_offset, &item_len, &ind);
}
CATCH (BoundsError) {
tvb_free(encr_tvb);
do_continue = TRUE;
}
ENDTRY;
if (do_continue) continue;
data_len = item_len + offset - CONFOUNDER_PLUS_CHECKSUM;
if ((int) item_len + offset > length) {
tvb_free(encr_tvb);
continue;
}
md5_append(&md5s, confounder, 8);
md5_append(&md5s, zero_fill, 16);
md5_append(&md5s, decrypted_data + CONFOUNDER_PLUS_CHECKSUM, data_len);
md5_finish(&md5s, digest);
if (tvb_memeql (encr_tvb, 8, digest, 16) == 0) {
g_warning("woohoo decrypted keytype:%d in frame:%u\n", keytype, pinfo->fd->num);
plaintext = g_malloc(data_len);
tvb_memcpy(encr_tvb, plaintext, CONFOUNDER_PLUS_CHECKSUM, data_len);
tvb_free(encr_tvb);
if (datalen) {
*datalen = data_len;
}
g_free(decrypted_data);
return(plaintext);
}
}
g_free(decrypted_data);
return NULL;
}
#endif /* HAVE_MIT_KERBEROS / HAVE_HEIMDAL_KERBEROS / HAVE_LIBNETTLE */
#define INET6_ADDRLEN 16
/* TCP Record Mark */
#define KRB_RM_RESERVED 0x80000000L
#define KRB_RM_RECLEN 0x7fffffffL
#define KRB5_MSG_TICKET 1 /* Ticket */
#define KRB5_MSG_AUTHENTICATOR 2 /* Authenticator */
#define KRB5_MSG_ENC_TICKET_PART 3 /* EncTicketPart */
#define KRB5_MSG_AS_REQ 10 /* AS-REQ type */
#define KRB5_MSG_AS_REP 11 /* AS-REP type */
#define KRB5_MSG_TGS_REQ 12 /* TGS-REQ type */
#define KRB5_MSG_TGS_REP 13 /* TGS-REP type */
#define KRB5_MSG_AP_REQ 14 /* AP-REQ type */
#define KRB5_MSG_AP_REP 15 /* AP-REP type */
#define KRB5_MSG_SAFE 20 /* KRB-SAFE type */
#define KRB5_MSG_PRIV 21 /* KRB-PRIV type */
#define KRB5_MSG_CRED 22 /* KRB-CRED type */
#define KRB5_MSG_ENC_AS_REP_PART 25 /* EncASRepPart */
#define KRB5_MSG_ENC_TGS_REP_PART 26 /* EncTGSRepPart */
#define KRB5_MSG_ENC_AP_REP_PART 27 /* EncAPRepPart */
#define KRB5_MSG_ENC_KRB_PRIV_PART 28 /* EncKrbPrivPart */
#define KRB5_MSG_ENC_KRB_CRED_PART 29 /* EncKrbCredPart */
#define KRB5_MSG_ERROR 30 /* KRB-ERROR type */
/* address type constants */
#define KRB5_ADDR_IPv4 0x02
#define KRB5_ADDR_CHAOS 0x05
#define KRB5_ADDR_XEROX 0x06
#define KRB5_ADDR_ISO 0x07
#define KRB5_ADDR_DECNET 0x0c
#define KRB5_ADDR_APPLETALK 0x10
#define KRB5_ADDR_NETBIOS 0x14
#define KRB5_ADDR_IPv6 0x18
/* encryption type constants */
#define KRB5_ENCTYPE_NULL 0
#define KRB5_ENCTYPE_DES_CBC_CRC 1
#define KRB5_ENCTYPE_DES_CBC_MD4 2
#define KRB5_ENCTYPE_DES_CBC_MD5 3
#define KRB5_ENCTYPE_DES_CBC_RAW 4
#define KRB5_ENCTYPE_DES3_CBC_SHA 5
#define KRB5_ENCTYPE_DES3_CBC_RAW 6
#define KRB5_ENCTYPE_DES_HMAC_SHA1 8
#define KRB5_ENCTYPE_DSA_SHA1_CMS 9
#define KRB5_ENCTYPE_RSA_MD5_CMS 10
#define KRB5_ENCTYPE_RSA_SHA1_CMS 11
#define KRB5_ENCTYPE_RC2_CBC_ENV 12
#define KRB5_ENCTYPE_RSA_ENV 13
#define KRB5_ENCTYPE_RSA_ES_OEAP_ENV 14
#define KRB5_ENCTYPE_DES_EDE3_CBC_ENV 15
#define KRB5_ENCTYPE_DES3_CBC_SHA1 16
#define KRB5_ENCTYPE_AES128_CTS_HMAC_SHA1_96 17
#define KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96 18
#define KRB5_ENCTYPE_DES_CBC_MD5_NT 20
#define KERB_ENCTYPE_RC4_HMAC 23
#define KERB_ENCTYPE_RC4_HMAC_EXP 24
#define KRB5_ENCTYPE_UNKNOWN 0x1ff
#define KRB5_ENCTYPE_LOCAL_DES3_HMAC_SHA1 0x7007
#define KRB5_ENCTYPE_RC4_PLAIN_EXP 0xffffff73
#define KRB5_ENCTYPE_RC4_PLAIN 0xffffff74
#define KRB5_ENCTYPE_RC4_PLAIN_OLD_EXP 0xffffff78
#define KRB5_ENCTYPE_RC4_HMAC_OLD_EXP 0xffffff79
#define KRB5_ENCTYPE_RC4_PLAIN_OLD 0xffffff7a
#define KRB5_ENCTYPE_RC4_HMAC_OLD 0xffffff7b
#define KRB5_ENCTYPE_DES_PLAIN 0xffffff7c
#define KRB5_ENCTYPE_RC4_SHA 0xffffff7d
#define KRB5_ENCTYPE_RC4_LM 0xffffff7e
#define KRB5_ENCTYPE_RC4_PLAIN2 0xffffff7f
#define KRB5_ENCTYPE_RC4_MD4 0xffffff80
/* checksum types */
#define KRB5_CHKSUM_NONE 0
#define KRB5_CHKSUM_CRC32 1
#define KRB5_CHKSUM_MD4 2
#define KRB5_CHKSUM_KRB_DES_MAC 4
#define KRB5_CHKSUM_KRB_DES_MAC_K 5
#define KRB5_CHKSUM_MD5 7
#define KRB5_CHKSUM_MD5_DES 8
/* the following four comes from packetcable */
#define KRB5_CHKSUM_MD5_DES3 9
#define KRB5_CHKSUM_HMAC_SHA1_DES3_KD 12
#define KRB5_CHKSUM_HMAC_SHA1_DES3 13
#define KRB5_CHKSUM_SHA1_UNKEYED 14
#define KRB5_CHKSUM_HMAC_MD5 0xffffff76
#define KRB5_CHKSUM_MD5_HMAC 0xffffff77
#define KRB5_CHKSUM_RC4_MD5 0xffffff78
#define KRB5_CHKSUM_MD25 0xffffff79
#define KRB5_CHKSUM_DES_MAC_MD5 0xffffff7a
#define KRB5_CHKSUM_DES_MAC 0xffffff7b
#define KRB5_CHKSUM_REAL_CRC32 0xffffff7c
#define KRB5_CHKSUM_SHA1 0xffffff7d
#define KRB5_CHKSUM_LM 0xffffff7e
#define KRB5_CHKSUM_GSSAPI 0x8003
/*
* For KERB_ENCTYPE_RC4_HMAC and KERB_ENCTYPE_RC4_HMAC_EXP, see
*
* http://www.ietf.org/internet-drafts/draft-brezak-win2k-krb-rc4-hmac-04.txt
*
* unless it's expired.
*/
/* pre-authentication type constants */
#define KRB5_PA_TGS_REQ 1
#define KRB5_PA_ENC_TIMESTAMP 2
#define KRB5_PA_PW_SALT 3
#define KRB5_PA_ENC_ENCKEY 4
#define KRB5_PA_ENC_UNIX_TIME 5
#define KRB5_PA_ENC_SANDIA_SECURID 6
#define KRB5_PA_SESAME 7
#define KRB5_PA_OSF_DCE 8
#define KRB5_PA_CYBERSAFE_SECUREID 9
#define KRB5_PA_AFS3_SALT 10
#define KRB5_PA_ENCTYPE_INFO 11
#define KRB5_PA_SAM_CHALLENGE 12
#define KRB5_PA_SAM_RESPONSE 13
#define KRB5_PA_PK_AS_REQ 14
#define KRB5_PA_PK_AS_REP 15
#define KRB5_PA_DASS 16
#define KRB5_PA_ENCTYPE_INFO2 19
#define KRB5_PA_USE_SPECIFIED_KVNO 20
#define KRB5_PA_SAM_REDIRECT 21
#define KRB5_PA_GET_FROM_TYPED_DATA 22
#define KRB5_PA_SAM_ETYPE_INFO 23
#define KRB5_PA_ALT_PRINC 24
#define KRB5_PA_SAM_CHALLENGE2 30
#define KRB5_PA_SAM_RESPONSE2 31
#define KRB5_TD_PKINIT_CMS_CERTIFICATES 101
#define KRB5_TD_KRB_PRINCIPAL 102
#define KRB5_TD_KRB_REALM 103
#define KRB5_TD_TRUSTED_CERTIFIERS 104
#define KRB5_TD_CERTIFICATE_INDEX 105
#define KRB5_TD_APP_DEFINED_ERROR 106
#define KRB5_TD_REQ_NONCE 107
#define KRB5_TD_REQ_SEQ 108
/* preauthentication types >127 (i.e. negative ones) are app specific.
Hopefully there will be no collisions here or we will have to
come up with something better.
XXX: Although KRB5_PA_PAC_REQUEST is " >127 " and thus presumably
would be encoded as a negative number, various captures seen all
have this pa-data-type encoded as a positive number (0x0080).
We'll assume that KRB5_PA_S4U2SELF is also encoded as a positive number.
*/
#define KRB5_PA_PAC_REQUEST 128 /* (Microsoft extension) */
#define KRB5_PA_S4U2SELF 129 /* Impersonation (Microsoft extension) */
#define KRB5_PA_PROV_SRV_LOCATION 0xffffffff /* (gint32)0xFF) packetcable stuff */
/* Principal name-type */
#define KRB5_NT_UNKNOWN 0
#define KRB5_NT_PRINCIPAL 1
#define KRB5_NT_SRV_INST 2
#define KRB5_NT_SRV_HST 3
#define KRB5_NT_SRV_XHST 4
#define KRB5_NT_UID 5
#define KRB5_NT_X500_PRINCIPAL 6
#define KRB5_NT_SMTP_NAME 7
#define KRB5_NT_ENTERPRISE 10
/*
* MS specific name types, from
*
* http://msdn.microsoft.com/library/en-us/security/security/kerb_external_name.asp
*/
#define KRB5_NT_MS_PRINCIPAL -128
#define KRB5_NT_MS_PRINCIPAL_AND_SID -129
#define KRB5_NT_ENT_PRINCIPAL_AND_SID -130
#define KRB5_NT_PRINCIPAL_AND_SID -131
#define KRB5_NT_SRV_INST_AND_SID -132
/* error table constants */
/* I prefixed the krb5_err.et constant names with KRB5_ET_ for these */
#define KRB5_ET_KRB5KDC_ERR_NONE 0
#define KRB5_ET_KRB5KDC_ERR_NAME_EXP 1
#define KRB5_ET_KRB5KDC_ERR_SERVICE_EXP 2
#define KRB5_ET_KRB5KDC_ERR_BAD_PVNO 3
#define KRB5_ET_KRB5KDC_ERR_C_OLD_MAST_KVNO 4
#define KRB5_ET_KRB5KDC_ERR_S_OLD_MAST_KVNO 5
#define KRB5_ET_KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN 6
#define KRB5_ET_KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN 7
#define KRB5_ET_KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE 8
#define KRB5_ET_KRB5KDC_ERR_NULL_KEY 9
#define KRB5_ET_KRB5KDC_ERR_CANNOT_POSTDATE 10
#define KRB5_ET_KRB5KDC_ERR_NEVER_VALID 11
#define KRB5_ET_KRB5KDC_ERR_POLICY 12
#define KRB5_ET_KRB5KDC_ERR_BADOPTION 13
#define KRB5_ET_KRB5KDC_ERR_ETYPE_NOSUPP 14
#define KRB5_ET_KRB5KDC_ERR_SUMTYPE_NOSUPP 15
#define KRB5_ET_KRB5KDC_ERR_PADATA_TYPE_NOSUPP 16
#define KRB5_ET_KRB5KDC_ERR_TRTYPE_NOSUPP 17
#define KRB5_ET_KRB5KDC_ERR_CLIENT_REVOKED 18
#define KRB5_ET_KRB5KDC_ERR_SERVICE_REVOKED 19
#define KRB5_ET_KRB5KDC_ERR_TGT_REVOKED 20
#define KRB5_ET_KRB5KDC_ERR_CLIENT_NOTYET 21
#define KRB5_ET_KRB5KDC_ERR_SERVICE_NOTYET 22
#define KRB5_ET_KRB5KDC_ERR_KEY_EXP 23
#define KRB5_ET_KRB5KDC_ERR_PREAUTH_FAILED 24
#define KRB5_ET_KRB5KDC_ERR_PREAUTH_REQUIRED 25
#define KRB5_ET_KRB5KDC_ERR_SERVER_NOMATCH 26
#define KRB5_ET_KRB5KDC_ERR_MUST_USE_USER2USER 27
#define KRB5_ET_KRB5KDC_ERR_PATH_NOT_ACCEPTED 28
#define KRB5_ET_KRB5KDC_ERR_SVC_UNAVAILABLE 29
#define KRB5_ET_KRB5KRB_AP_ERR_BAD_INTEGRITY 31
#define KRB5_ET_KRB5KRB_AP_ERR_TKT_EXPIRED 32
#define KRB5_ET_KRB5KRB_AP_ERR_TKT_NYV 33
#define KRB5_ET_KRB5KRB_AP_ERR_REPEAT 34
#define KRB5_ET_KRB5KRB_AP_ERR_NOT_US 35
#define KRB5_ET_KRB5KRB_AP_ERR_BADMATCH 36
#define KRB5_ET_KRB5KRB_AP_ERR_SKEW 37
#define KRB5_ET_KRB5KRB_AP_ERR_BADADDR 38
#define KRB5_ET_KRB5KRB_AP_ERR_BADVERSION 39
#define KRB5_ET_KRB5KRB_AP_ERR_MSG_TYPE 40
#define KRB5_ET_KRB5KRB_AP_ERR_MODIFIED 41
#define KRB5_ET_KRB5KRB_AP_ERR_BADORDER 42
#define KRB5_ET_KRB5KRB_AP_ERR_ILL_CR_TKT 43
#define KRB5_ET_KRB5KRB_AP_ERR_BADKEYVER 44
#define KRB5_ET_KRB5KRB_AP_ERR_NOKEY 45
#define KRB5_ET_KRB5KRB_AP_ERR_MUT_FAIL 46
#define KRB5_ET_KRB5KRB_AP_ERR_BADDIRECTION 47
#define KRB5_ET_KRB5KRB_AP_ERR_METHOD 48
#define KRB5_ET_KRB5KRB_AP_ERR_BADSEQ 49
#define KRB5_ET_KRB5KRB_AP_ERR_INAPP_CKSUM 50
#define KRB5_ET_KRB5KDC_AP_PATH_NOT_ACCEPTED 51
#define KRB5_ET_KRB5KRB_ERR_RESPONSE_TOO_BIG 52
#define KRB5_ET_KRB5KRB_ERR_GENERIC 60
#define KRB5_ET_KRB5KRB_ERR_FIELD_TOOLONG 61
#define KRB5_ET_KDC_ERROR_CLIENT_NOT_TRUSTED 62
#define KRB5_ET_KDC_ERROR_KDC_NOT_TRUSTED 63
#define KRB5_ET_KDC_ERROR_INVALID_SIG 64
#define KRB5_ET_KDC_ERR_KEY_TOO_WEAK 65
#define KRB5_ET_KDC_ERR_CERTIFICATE_MISMATCH 66
#define KRB5_ET_KRB_AP_ERR_NO_TGT 67
#define KRB5_ET_KDC_ERR_WRONG_REALM 68
#define KRB5_ET_KRB_AP_ERR_USER_TO_USER_REQUIRED 69
#define KRB5_ET_KDC_ERR_CANT_VERIFY_CERTIFICATE 70
#define KRB5_ET_KDC_ERR_INVALID_CERTIFICATE 71
#define KRB5_ET_KDC_ERR_REVOKED_CERTIFICATE 72
#define KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNKNOWN 73
#define KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNAVAILABLE 74
#define KRB5_ET_KDC_ERR_CLIENT_NAME_MISMATCH 75
#define KRB5_ET_KDC_ERR_KDC_NAME_MISMATCH 76
static const value_string krb5_error_codes[] = {
{ KRB5_ET_KRB5KDC_ERR_NONE, "KRB5KDC_ERR_NONE" },
{ KRB5_ET_KRB5KDC_ERR_NAME_EXP, "KRB5KDC_ERR_NAME_EXP" },
{ KRB5_ET_KRB5KDC_ERR_SERVICE_EXP, "KRB5KDC_ERR_SERVICE_EXP" },
{ KRB5_ET_KRB5KDC_ERR_BAD_PVNO, "KRB5KDC_ERR_BAD_PVNO" },
{ KRB5_ET_KRB5KDC_ERR_C_OLD_MAST_KVNO, "KRB5KDC_ERR_C_OLD_MAST_KVNO" },
{ KRB5_ET_KRB5KDC_ERR_S_OLD_MAST_KVNO, "KRB5KDC_ERR_S_OLD_MAST_KVNO" },
{ KRB5_ET_KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN, "KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN" },
{ KRB5_ET_KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN, "KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN" },
{ KRB5_ET_KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE, "KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE" },
{ KRB5_ET_KRB5KDC_ERR_NULL_KEY, "KRB5KDC_ERR_NULL_KEY" },
{ KRB5_ET_KRB5KDC_ERR_CANNOT_POSTDATE, "KRB5KDC_ERR_CANNOT_POSTDATE" },
{ KRB5_ET_KRB5KDC_ERR_NEVER_VALID, "KRB5KDC_ERR_NEVER_VALID" },
{ KRB5_ET_KRB5KDC_ERR_POLICY, "KRB5KDC_ERR_POLICY" },
{ KRB5_ET_KRB5KDC_ERR_BADOPTION, "KRB5KDC_ERR_BADOPTION" },
{ KRB5_ET_KRB5KDC_ERR_ETYPE_NOSUPP, "KRB5KDC_ERR_ETYPE_NOSUPP" },
{ KRB5_ET_KRB5KDC_ERR_SUMTYPE_NOSUPP, "KRB5KDC_ERR_SUMTYPE_NOSUPP" },
{ KRB5_ET_KRB5KDC_ERR_PADATA_TYPE_NOSUPP, "KRB5KDC_ERR_PADATA_TYPE_NOSUPP" },
{ KRB5_ET_KRB5KDC_ERR_TRTYPE_NOSUPP, "KRB5KDC_ERR_TRTYPE_NOSUPP" },
{ KRB5_ET_KRB5KDC_ERR_CLIENT_REVOKED, "KRB5KDC_ERR_CLIENT_REVOKED" },
{ KRB5_ET_KRB5KDC_ERR_SERVICE_REVOKED, "KRB5KDC_ERR_SERVICE_REVOKED" },
{ KRB5_ET_KRB5KDC_ERR_TGT_REVOKED, "KRB5KDC_ERR_TGT_REVOKED" },
{ KRB5_ET_KRB5KDC_ERR_CLIENT_NOTYET, "KRB5KDC_ERR_CLIENT_NOTYET" },
{ KRB5_ET_KRB5KDC_ERR_SERVICE_NOTYET, "KRB5KDC_ERR_SERVICE_NOTYET" },
{ KRB5_ET_KRB5KDC_ERR_KEY_EXP, "KRB5KDC_ERR_KEY_EXP" },
{ KRB5_ET_KRB5KDC_ERR_PREAUTH_FAILED, "KRB5KDC_ERR_PREAUTH_FAILED" },
{ KRB5_ET_KRB5KDC_ERR_PREAUTH_REQUIRED, "KRB5KDC_ERR_PREAUTH_REQUIRED" },
{ KRB5_ET_KRB5KDC_ERR_SERVER_NOMATCH, "KRB5KDC_ERR_SERVER_NOMATCH" },
{ KRB5_ET_KRB5KDC_ERR_MUST_USE_USER2USER, "KRB5KDC_ERR_MUST_USE_USER2USER" },
{ KRB5_ET_KRB5KDC_ERR_PATH_NOT_ACCEPTED, "KRB5KDC_ERR_PATH_NOT_ACCEPTED" },
{ KRB5_ET_KRB5KDC_ERR_SVC_UNAVAILABLE, "KRB5KDC_ERR_SVC_UNAVAILABLE" },
{ KRB5_ET_KRB5KRB_AP_ERR_BAD_INTEGRITY, "KRB5KRB_AP_ERR_BAD_INTEGRITY" },
{ KRB5_ET_KRB5KRB_AP_ERR_TKT_EXPIRED, "KRB5KRB_AP_ERR_TKT_EXPIRED" },
{ KRB5_ET_KRB5KRB_AP_ERR_TKT_NYV, "KRB5KRB_AP_ERR_TKT_NYV" },
{ KRB5_ET_KRB5KRB_AP_ERR_REPEAT, "KRB5KRB_AP_ERR_REPEAT" },
{ KRB5_ET_KRB5KRB_AP_ERR_NOT_US, "KRB5KRB_AP_ERR_NOT_US" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADMATCH, "KRB5KRB_AP_ERR_BADMATCH" },
{ KRB5_ET_KRB5KRB_AP_ERR_SKEW, "KRB5KRB_AP_ERR_SKEW" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADADDR, "KRB5KRB_AP_ERR_BADADDR" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADVERSION, "KRB5KRB_AP_ERR_BADVERSION" },
{ KRB5_ET_KRB5KRB_AP_ERR_MSG_TYPE, "KRB5KRB_AP_ERR_MSG_TYPE" },
{ KRB5_ET_KRB5KRB_AP_ERR_MODIFIED, "KRB5KRB_AP_ERR_MODIFIED" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADORDER, "KRB5KRB_AP_ERR_BADORDER" },
{ KRB5_ET_KRB5KRB_AP_ERR_ILL_CR_TKT, "KRB5KRB_AP_ERR_ILL_CR_TKT" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADKEYVER, "KRB5KRB_AP_ERR_BADKEYVER" },
{ KRB5_ET_KRB5KRB_AP_ERR_NOKEY, "KRB5KRB_AP_ERR_NOKEY" },
{ KRB5_ET_KRB5KRB_AP_ERR_MUT_FAIL, "KRB5KRB_AP_ERR_MUT_FAIL" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADDIRECTION, "KRB5KRB_AP_ERR_BADDIRECTION" },
{ KRB5_ET_KRB5KRB_AP_ERR_METHOD, "KRB5KRB_AP_ERR_METHOD" },
{ KRB5_ET_KRB5KRB_AP_ERR_BADSEQ, "KRB5KRB_AP_ERR_BADSEQ" },
{ KRB5_ET_KRB5KRB_AP_ERR_INAPP_CKSUM, "KRB5KRB_AP_ERR_INAPP_CKSUM" },
{ KRB5_ET_KRB5KDC_AP_PATH_NOT_ACCEPTED, "KRB5KDC_AP_PATH_NOT_ACCEPTED" },
{ KRB5_ET_KRB5KRB_ERR_RESPONSE_TOO_BIG, "KRB5KRB_ERR_RESPONSE_TOO_BIG"},
{ KRB5_ET_KRB5KRB_ERR_GENERIC, "KRB5KRB_ERR_GENERIC" },
{ KRB5_ET_KRB5KRB_ERR_FIELD_TOOLONG, "KRB5KRB_ERR_FIELD_TOOLONG" },
{ KRB5_ET_KDC_ERROR_CLIENT_NOT_TRUSTED, "KDC_ERROR_CLIENT_NOT_TRUSTED" },
{ KRB5_ET_KDC_ERROR_KDC_NOT_TRUSTED, "KDC_ERROR_KDC_NOT_TRUSTED" },
{ KRB5_ET_KDC_ERROR_INVALID_SIG, "KDC_ERROR_INVALID_SIG" },
{ KRB5_ET_KDC_ERR_KEY_TOO_WEAK, "KDC_ERR_KEY_TOO_WEAK" },
{ KRB5_ET_KDC_ERR_CERTIFICATE_MISMATCH, "KDC_ERR_CERTIFICATE_MISMATCH" },
{ KRB5_ET_KRB_AP_ERR_NO_TGT, "KRB_AP_ERR_NO_TGT" },
{ KRB5_ET_KDC_ERR_WRONG_REALM, "KDC_ERR_WRONG_REALM" },
{ KRB5_ET_KRB_AP_ERR_USER_TO_USER_REQUIRED, "KRB_AP_ERR_USER_TO_USER_REQUIRED" },
{ KRB5_ET_KDC_ERR_CANT_VERIFY_CERTIFICATE, "KDC_ERR_CANT_VERIFY_CERTIFICATE" },
{ KRB5_ET_KDC_ERR_INVALID_CERTIFICATE, "KDC_ERR_INVALID_CERTIFICATE" },
{ KRB5_ET_KDC_ERR_REVOKED_CERTIFICATE, "KDC_ERR_REVOKED_CERTIFICATE" },
{ KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNKNOWN, "KDC_ERR_REVOCATION_STATUS_UNKNOWN" },
{ KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNAVAILABLE, "KDC_ERR_REVOCATION_STATUS_UNAVAILABLE" },
{ KRB5_ET_KDC_ERR_CLIENT_NAME_MISMATCH, "KDC_ERR_CLIENT_NAME_MISMATCH" },
{ KRB5_ET_KDC_ERR_KDC_NAME_MISMATCH, "KDC_ERR_KDC_NAME_MISMATCH" },
{ 0, NULL }
};
#define PAC_LOGON_INFO 1
#define PAC_CREDENTIAL_TYPE 2
#define PAC_SERVER_CHECKSUM 6
#define PAC_PRIVSVR_CHECKSUM 7
#define PAC_CLIENT_INFO_TYPE 10
#define PAC_CONSTRAINED_DELEGATION 11
#define PAC_UPN_DNS_INFO 12
static const value_string w2k_pac_types[] = {
{ PAC_LOGON_INFO , "Logon Info" },
{ PAC_CREDENTIAL_TYPE , "Credential Type" },
{ PAC_SERVER_CHECKSUM , "Server Checksum" },
{ PAC_PRIVSVR_CHECKSUM , "Privsvr Checksum" },
{ PAC_CLIENT_INFO_TYPE , "Client Info Type" },
{ PAC_CONSTRAINED_DELEGATION, "Constrained Delegation" },
{ PAC_UPN_DNS_INFO , "UPN DNS Info" },
{ 0, NULL },
};
static const value_string krb5_princ_types[] = {
{ KRB5_NT_UNKNOWN , "Unknown" },
{ KRB5_NT_PRINCIPAL , "Principal" },
{ KRB5_NT_SRV_INST , "Service and Instance" },
{ KRB5_NT_SRV_HST , "Service and Host" },
{ KRB5_NT_SRV_XHST , "Service and Host Components" },
{ KRB5_NT_UID , "Unique ID" },
{ KRB5_NT_X500_PRINCIPAL , "Encoded X.509 Distinguished Name" },
{ KRB5_NT_SMTP_NAME , "SMTP Name" },
{ KRB5_NT_ENTERPRISE , "Enterprise Name" },
{ KRB5_NT_MS_PRINCIPAL , "NT 4.0 style name (MS specific)" },
{ KRB5_NT_MS_PRINCIPAL_AND_SID , "NT 4.0 style name with SID (MS specific)"},
{ KRB5_NT_ENT_PRINCIPAL_AND_SID, "UPN and SID (MS specific)"},
{ KRB5_NT_PRINCIPAL_AND_SID , "Principal name and SID (MS specific)"},
{ KRB5_NT_SRV_INST_AND_SID , "SPN and SID (MS specific)"},
{ 0 , NULL },
};
static const value_string krb5_preauthentication_types[] = {
{ KRB5_PA_TGS_REQ , "PA-TGS-REQ" },
{ KRB5_PA_ENC_TIMESTAMP , "PA-ENC-TIMESTAMP" },
{ KRB5_PA_PW_SALT , "PA-PW-SALT" },
{ KRB5_PA_ENC_ENCKEY , "PA-ENC-ENCKEY" },
{ KRB5_PA_ENC_UNIX_TIME , "PA-ENC-UNIX-TIME" },
{ KRB5_PA_ENC_SANDIA_SECURID , "PA-PW-SALT" },
{ KRB5_PA_SESAME , "PA-SESAME" },
{ KRB5_PA_OSF_DCE , "PA-OSF-DCE" },
{ KRB5_PA_CYBERSAFE_SECUREID , "PA-CYBERSAFE-SECURID" },
{ KRB5_PA_AFS3_SALT , "PA-AFS3-SALT" },
{ KRB5_PA_ENCTYPE_INFO , "PA-ENCTYPE-INFO" },
{ KRB5_PA_ENCTYPE_INFO2 , "PA-ENCTYPE-INFO2" },
{ KRB5_PA_SAM_CHALLENGE , "PA-SAM-CHALLENGE" },
{ KRB5_PA_SAM_RESPONSE , "PA-SAM-RESPONSE" },
{ KRB5_PA_PK_AS_REQ , "PA-PK-AS-REQ" },
{ KRB5_PA_PK_AS_REP , "PA-PK-AS-REP" },
{ KRB5_PA_DASS , "PA-DASS" },
{ KRB5_PA_USE_SPECIFIED_KVNO , "PA-USE-SPECIFIED-KVNO" },
{ KRB5_PA_SAM_REDIRECT , "PA-SAM-REDIRECT" },
{ KRB5_PA_GET_FROM_TYPED_DATA , "PA-GET-FROM-TYPED-DATA" },
{ KRB5_PA_SAM_ETYPE_INFO , "PA-SAM-ETYPE-INFO" },
{ KRB5_PA_ALT_PRINC , "PA-ALT-PRINC" },
{ KRB5_PA_SAM_CHALLENGE2 , "PA-SAM-CHALLENGE2" },
{ KRB5_PA_SAM_RESPONSE2 , "PA-SAM-RESPONSE2" },
{ KRB5_TD_PKINIT_CMS_CERTIFICATES, "TD-PKINIT-CMS-CERTIFICATES" },
{ KRB5_TD_KRB_PRINCIPAL , "TD-KRB-PRINCIPAL" },
{ KRB5_TD_KRB_REALM , "TD-KRB-REALM" },
{ KRB5_TD_TRUSTED_CERTIFIERS , "TD-TRUSTED-CERTIFIERS" },
{ KRB5_TD_CERTIFICATE_INDEX , "TD-CERTIFICATE-INDEX" },
{ KRB5_TD_APP_DEFINED_ERROR , "TD-APP-DEFINED-ERROR" },
{ KRB5_TD_REQ_NONCE , "TD-REQ-NONCE" },
{ KRB5_TD_REQ_SEQ , "TD-REQ-SEQ" },
{ KRB5_PA_PAC_REQUEST , "PA-PAC-REQUEST" },
{ KRB5_PA_S4U2SELF , "PA-S4U2SELF" },
{ KRB5_PA_PROV_SRV_LOCATION , "PA-PROV-SRV-LOCATION" },
{ 0 , NULL },
};
static const value_string krb5_encryption_types[] = {
{ KRB5_ENCTYPE_NULL , "NULL" },
{ KRB5_ENCTYPE_DES_CBC_CRC , "des-cbc-crc" },
{ KRB5_ENCTYPE_DES_CBC_MD4 , "des-cbc-md4" },
{ KRB5_ENCTYPE_DES_CBC_MD5 , "des-cbc-md5" },
{ KRB5_ENCTYPE_DES_CBC_RAW , "des-cbc-raw" },
{ KRB5_ENCTYPE_DES3_CBC_SHA , "des3-cbc-sha" },
{ KRB5_ENCTYPE_DES3_CBC_RAW , "des3-cbc-raw" },
{ KRB5_ENCTYPE_DES_HMAC_SHA1 , "des-hmac-sha1" },
{ KRB5_ENCTYPE_DSA_SHA1_CMS , "dsa-sha1-cms" },
{ KRB5_ENCTYPE_RSA_MD5_CMS , "rsa-md5-cms" },
{ KRB5_ENCTYPE_RSA_SHA1_CMS , "rsa-sha1-cms" },
{ KRB5_ENCTYPE_RC2_CBC_ENV , "rc2-cbc-env" },
{ KRB5_ENCTYPE_RSA_ENV , "rsa-env" },
{ KRB5_ENCTYPE_RSA_ES_OEAP_ENV, "rsa-es-oeap-env" },
{ KRB5_ENCTYPE_DES_EDE3_CBC_ENV, "des-ede3-cbc-env" },
{ KRB5_ENCTYPE_DES3_CBC_SHA1 , "des3-cbc-sha1" },
{ KRB5_ENCTYPE_AES128_CTS_HMAC_SHA1_96 , "aes128-cts-hmac-sha1-96" },
{ KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96 , "aes256-cts-hmac-sha1-96" },
{ KRB5_ENCTYPE_DES_CBC_MD5_NT , "des-cbc-md5-nt" },
{ KERB_ENCTYPE_RC4_HMAC , "rc4-hmac" },
{ KERB_ENCTYPE_RC4_HMAC_EXP , "rc4-hmac-exp" },
{ KRB5_ENCTYPE_UNKNOWN , "unknown" },
{ KRB5_ENCTYPE_LOCAL_DES3_HMAC_SHA1 , "local-des3-hmac-sha1" },
{ KRB5_ENCTYPE_RC4_PLAIN_EXP , "rc4-plain-exp" },
{ KRB5_ENCTYPE_RC4_PLAIN , "rc4-plain" },
{ KRB5_ENCTYPE_RC4_PLAIN_OLD_EXP, "rc4-plain-old-exp" },
{ KRB5_ENCTYPE_RC4_HMAC_OLD_EXP, "rc4-hmac-old-exp" },
{ KRB5_ENCTYPE_RC4_PLAIN_OLD , "rc4-plain-old" },
{ KRB5_ENCTYPE_RC4_HMAC_OLD , "rc4-hmac-old" },
{ KRB5_ENCTYPE_DES_PLAIN , "des-plain" },
{ KRB5_ENCTYPE_RC4_SHA , "rc4-sha" },
{ KRB5_ENCTYPE_RC4_LM , "rc4-lm" },
{ KRB5_ENCTYPE_RC4_PLAIN2 , "rc4-plain2" },
{ KRB5_ENCTYPE_RC4_MD4 , "rc4-md4" },
{ 0 , NULL },
};
static const value_string krb5_checksum_types[] = {
{ KRB5_CHKSUM_NONE , "none" },
{ KRB5_CHKSUM_CRC32 , "crc32" },
{ KRB5_CHKSUM_MD4 , "md4" },
{ KRB5_CHKSUM_KRB_DES_MAC , "krb-des-mac" },
{ KRB5_CHKSUM_KRB_DES_MAC_K , "krb-des-mac-k" },
{ KRB5_CHKSUM_MD5 , "md5" },
{ KRB5_CHKSUM_MD5_DES , "md5-des" },
{ KRB5_CHKSUM_MD5_DES3 , "md5-des3" },
{ KRB5_CHKSUM_HMAC_SHA1_DES3_KD, "hmac-sha1-des3-kd" },
{ KRB5_CHKSUM_HMAC_SHA1_DES3 , "hmac-sha1-des3" },
{ KRB5_CHKSUM_SHA1_UNKEYED , "sha1 (unkeyed)" },
{ KRB5_CHKSUM_HMAC_MD5 , "hmac-md5" },
{ KRB5_CHKSUM_MD5_HMAC , "md5-hmac" },
{ KRB5_CHKSUM_RC4_MD5 , "rc5-md5" },
{ KRB5_CHKSUM_MD25 , "md25" },
{ KRB5_CHKSUM_DES_MAC_MD5 , "des-mac-md5" },
{ KRB5_CHKSUM_DES_MAC , "des-mac" },
{ KRB5_CHKSUM_REAL_CRC32 , "real-crc32" },
{ KRB5_CHKSUM_SHA1 , "sha1" },
{ KRB5_CHKSUM_LM , "lm" },
{ KRB5_CHKSUM_GSSAPI , "gssapi-8003" },
{ 0 , NULL },
};
#define KRB5_AD_IF_RELEVANT 1
#define KRB5_AD_INTENDED_FOR_SERVER 2
#define KRB5_AD_INTENDED_FOR_APPLICATION_CLASS 3
#define KRB5_AD_KDC_ISSUED 4
#define KRB5_AD_OR 5
#define KRB5_AD_MANDATORY_TICKET_EXTENSIONS 6
#define KRB5_AD_IN_TICKET_EXTENSIONS 7
#define KRB5_AD_MANDATORY_FOR_KDC 8
#define KRB5_AD_OSF_DCE 64
#define KRB5_AD_SESAME 65
#define KRB5_AD_OSF_DCE_PKI_CERTID 66
#define KRB5_AD_WIN2K_PAC 128
#define KRB5_AD_SIGNTICKET 0xffffffef
static const value_string krb5_ad_types[] = {
{ KRB5_AD_IF_RELEVANT , "AD-IF-RELEVANT" },
{ KRB5_AD_INTENDED_FOR_SERVER , "AD-Intended-For-Server" },
{ KRB5_AD_INTENDED_FOR_APPLICATION_CLASS , "AD-Intended-For-Application-Class" },
{ KRB5_AD_KDC_ISSUED , "AD-KDCIssued" },
{ KRB5_AD_OR , "AD-AND-OR" },
{ KRB5_AD_MANDATORY_TICKET_EXTENSIONS , "AD-Mandatory-Ticket-Extensions" },
{ KRB5_AD_IN_TICKET_EXTENSIONS , "AD-IN-Ticket-Extensions" },
{ KRB5_AD_MANDATORY_FOR_KDC , "AD-MANDATORY-FOR-KDC" },
{ KRB5_AD_OSF_DCE , "AD-OSF-DCE" },
{ KRB5_AD_SESAME , "AD-SESAME" },
{ KRB5_AD_OSF_DCE_PKI_CERTID , "AD-OSF-DCE-PKI-CertID" },
{ KRB5_AD_WIN2K_PAC , "AD-Win2k-PAC" },
{ KRB5_AD_SIGNTICKET , "AD-SignTicket" },
{ 0 , NULL },
};
static const value_string krb5_transited_types[] = {
{ 1 , "DOMAIN-X500-COMPRESS" },
{ 0 , NULL }
};
static const value_string krb5_address_types[] = {
{ KRB5_ADDR_IPv4, "IPv4"},
{ KRB5_ADDR_CHAOS, "CHAOS"},
{ KRB5_ADDR_XEROX, "XEROX"},
{ KRB5_ADDR_ISO, "ISO"},
{ KRB5_ADDR_DECNET, "DECNET"},
{ KRB5_ADDR_APPLETALK, "APPLETALK"},
{ KRB5_ADDR_NETBIOS, "NETBIOS"},
{ KRB5_ADDR_IPv6, "IPv6"},
{ 0, NULL },
};
static const value_string krb5_msg_types[] = {
{ KRB5_MSG_TICKET, "Ticket" },
{ KRB5_MSG_AUTHENTICATOR, "Authenticator" },
{ KRB5_MSG_ENC_TICKET_PART, "EncTicketPart" },
{ KRB5_MSG_TGS_REQ, "TGS-REQ" },
{ KRB5_MSG_TGS_REP, "TGS-REP" },
{ KRB5_MSG_AS_REQ, "AS-REQ" },
{ KRB5_MSG_AS_REP, "AS-REP" },
{ KRB5_MSG_AP_REQ, "AP-REQ" },
{ KRB5_MSG_AP_REP, "AP-REP" },
{ KRB5_MSG_SAFE, "KRB-SAFE" },
{ KRB5_MSG_PRIV, "KRB-PRIV" },
{ KRB5_MSG_CRED, "KRB-CRED" },
{ KRB5_MSG_ENC_AS_REP_PART, "EncASRepPart" },
{ KRB5_MSG_ENC_TGS_REP_PART, "EncTGSRepPart" },
{ KRB5_MSG_ENC_AP_REP_PART, "EncAPRepPart" },
{ KRB5_MSG_ENC_KRB_PRIV_PART, "EncKrbPrivPart" },
{ KRB5_MSG_ENC_KRB_CRED_PART, "EncKrbCredPart" },
{ KRB5_MSG_ERROR, "KRB-ERROR" },
{ 0, NULL },
};
#ifdef HAVE_KERBEROS
static int
dissect_krb5_decrypt_authenticator_data (proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_)
{
guint8 *plaintext=NULL;
int length;
length=tvb_length_remaining(tvb, offset);
/* draft-ietf-krb-wg-kerberos-clarifications-05.txt :
* 7.5.1
* Authenticators are encrypted with usage
* == 7 or
* == 11
*/
if(!plaintext){
plaintext=decrypt_krb5_data(tree, actx->pinfo, 7, length, tvb_get_ptr(tvb, offset, length), authenticator_etype, NULL);
}
if(!plaintext){
plaintext=decrypt_krb5_data(tree, actx->pinfo, 11, length, tvb_get_ptr(tvb, offset, length), authenticator_etype, NULL);
}
if(plaintext){
tvbuff_t *next_tvb;
next_tvb = tvb_new_real_data (plaintext,
length,
length);
tvb_set_free_cb(next_tvb, g_free);
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
/* Add the decrypted data to the data source list. */
add_new_data_source(actx->pinfo, next_tvb, "Decrypted Krb5");
offset=dissect_kerberos_Applications(FALSE, next_tvb, 0, actx , tree, /* hf_index */ -1);
}
return offset;
}
#endif
static int
dissect_krb5_PA_PROV_SRV_LOCATION(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_)
{
offset=dissect_ber_GeneralString(actx, tree, tvb, offset, hf_krb_provsrv_location, NULL, 0);
return offset;
}
static int
dissect_krb5_PW_SALT(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_)
{
guint32 nt_status;
/* Microsoft stores a special 12 byte blob here
* guint32 NT_status
* guint32 unknown
* guint32 unknown
* decode everything as this blob for now until we see if anyone
* else ever uses it or we learn how to tell whether this
* is such an MS blob or not.
*/
proto_tree_add_item(tree, hf_krb_smb_nt_status, tvb, offset, 4,
TRUE);
nt_status=tvb_get_letohl(tvb, offset);
if(nt_status && check_col(actx->pinfo->cinfo, COL_INFO)) {
col_append_fstr(actx->pinfo->cinfo, COL_INFO,
" NT Status: %s",
val_to_str(nt_status, NT_errors,
"Unknown error code %#x"));
}
offset += 4;
proto_tree_add_item(tree, hf_krb_smb_unknown, tvb, offset, 4,
TRUE);
offset += 4;
proto_tree_add_item(tree, hf_krb_smb_unknown, tvb, offset, 4,
TRUE);
offset += 4;
return offset;
}
#include "packet-kerberos-fn.c"
/* Make wrappers around exported functions for now */
int
dissect_krb5_Checksum(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_)
{
return dissect_kerberos_Checksum(FALSE, tvb, offset, actx, tree, hf_kerberos_cksum);
}
int
dissect_krb5_ctime(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_)
{
return dissect_kerberos_KerberosTime(FALSE, tvb, offset, actx, tree, hf_kerberos_ctime);
}
int
dissect_krb5_cname(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_)
{
return dissect_kerberos_PrincipalName(FALSE, tvb, offset, actx, tree, hf_kerberos_cname);
}
int
dissect_krb5_realm(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_)
{
return dissect_kerberos_Realm(FALSE, tvb, offset, actx, tree, hf_kerberos_realm);
}
static gint
dissect_kerberos_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
gboolean dci, gboolean do_col_protocol, gboolean have_rm,
kerberos_callbacks *cb)
{
volatile int offset = 0;
proto_tree *volatile kerberos_tree = NULL;
proto_item *volatile item = NULL;
void *saved_private_data;
asn1_ctx_t asn1_ctx;
/* TCP record mark and length */
guint32 krb_rm = 0;
gint krb_reclen = 0;
saved_private_data=pinfo->private_data;
pinfo->private_data=cb;
do_col_info=dci;
if (have_rm) {
krb_rm = tvb_get_ntohl(tvb, offset);
krb_reclen = kerberos_rm_to_reclen(krb_rm);
/*
* What is a reasonable size limit?
*/
if (krb_reclen > 10 * 1024 * 1024) {
pinfo->private_data=saved_private_data;
return (-1);
}
if (do_col_protocol) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5");
}
if (tree) {
item = proto_tree_add_item(tree, proto_kerberos, tvb, 0, -1, FALSE);
kerberos_tree = proto_item_add_subtree(item, ett_kerberos);
}
show_krb_recordmark(kerberos_tree, tvb, offset, krb_rm);
offset += 4;
} else {
/* Do some sanity checking here,
* All krb5 packets start with a TAG class that is BER_CLASS_APP
* and a tag value that is either of the values below:
* If it doesnt look like kerberos, return 0 and let someone else have
* a go at it.
*/
gint8 tmp_class;
gboolean tmp_pc;
gint32 tmp_tag;
get_ber_identifier(tvb, offset, &tmp_class, &tmp_pc, &tmp_tag);
if(tmp_class!=BER_CLASS_APP){
pinfo->private_data=saved_private_data;
return 0;
}
switch(tmp_tag){
case KRB5_MSG_TICKET:
case KRB5_MSG_AUTHENTICATOR:
case KRB5_MSG_ENC_TICKET_PART:
case KRB5_MSG_AS_REQ:
case KRB5_MSG_AS_REP:
case KRB5_MSG_TGS_REQ:
case KRB5_MSG_TGS_REP:
case KRB5_MSG_AP_REQ:
case KRB5_MSG_AP_REP:
case KRB5_MSG_ENC_AS_REP_PART:
case KRB5_MSG_ENC_TGS_REP_PART:
case KRB5_MSG_ENC_AP_REP_PART:
case KRB5_MSG_ENC_KRB_PRIV_PART:
case KRB5_MSG_ENC_KRB_CRED_PART:
case KRB5_MSG_SAFE:
case KRB5_MSG_PRIV:
case KRB5_MSG_ERROR:
break;
default:
pinfo->private_data=saved_private_data;
return 0;
}
if (do_col_protocol) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5");
}
if (do_col_info) {
col_clear(pinfo->cinfo, COL_INFO);
}
if (tree) {
item = proto_tree_add_item(tree, proto_kerberos, tvb, 0, -1, FALSE);
kerberos_tree = proto_item_add_subtree(item, ett_kerberos);
}
}
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
TRY {
offset=dissect_kerberos_Applications(FALSE, tvb, 0, &asn1_ctx , tree, /* hf_index */ -1);
} CATCH_ALL {
pinfo->private_data=saved_private_data;
RETHROW;
} ENDTRY;
proto_item_set_len(item, offset);
pinfo->private_data=saved_private_data;
return offset;
}
/*
* Display the TCP record mark.
*/
void
show_krb_recordmark(proto_tree *tree, tvbuff_t *tvb, gint start, guint32 krb_rm)
{
gint rec_len;
proto_item *rm_item;
proto_tree *rm_tree;
if (tree == NULL)
return;
rec_len = kerberos_rm_to_reclen(krb_rm);
rm_item = proto_tree_add_text(tree, tvb, start, 4,
"Record Mark: %u %s", rec_len, plurality(rec_len, "byte", "bytes"));
rm_tree = proto_item_add_subtree(rm_item, ett_krb_recordmark);
proto_tree_add_boolean(rm_tree, hf_krb_rm_reserved, tvb, start, 4, krb_rm);
proto_tree_add_uint(rm_tree, hf_krb_rm_reclen, tvb, start, 4, krb_rm);
}
gint
dissect_kerberos_main(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int do_col_info, kerberos_callbacks *cb)
{
return (dissect_kerberos_common(tvb, pinfo, tree, do_col_info, FALSE, FALSE, cb));
}
guint32
kerberos_output_keytype(void)
{
return keytype;
}
static gint
dissect_kerberos_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Some weird kerberos implementation apparently do krb4 on the krb5 port.
Since all (except weirdo transarc krb4 stuff) use
an opcode <=16 in the first byte, use this to see if it might
be krb4.
All krb5 commands start with an APPL tag and thus is >=0x60
so if first byte is <=16 just blindly assume it is krb4 then
*/
if(tvb_length(tvb) >= 1 && tvb_get_guint8(tvb, 0)<=0x10){
if(krb4_handle){
gboolean res;
res=call_dissector_only(krb4_handle, tvb, pinfo, tree);
return res;
}else{
return 0;
}
}
return dissect_kerberos_common(tvb, pinfo, tree, TRUE, TRUE, FALSE, NULL);
}
gint
kerberos_rm_to_reclen(guint krb_rm)
{
return (krb_rm & KRB_RM_RECLEN);
}
guint
get_krb_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
guint krb_rm;
gint pdulen;
krb_rm = tvb_get_ntohl(tvb, offset);
pdulen = kerberos_rm_to_reclen(krb_rm);
return (pdulen + 4);
}
static void
kerberos_prefs_apply_cb(void) {
#ifdef HAVE_LIBNETTLE
clear_keytab();
read_keytab_file(keytab_filename);
#endif
}
/*--- proto_register_kerberos -------------------------------------------*/
void proto_register_kerberos(void) {
/* List of fields */
static hf_register_info hf[] = {
{ &hf_krb_rm_reserved, {
"Reserved", "kerberos.rm.reserved", FT_BOOLEAN, 32,
&bitval, KRB_RM_RESERVED, "Record mark reserved bit", HFILL }},
{ &hf_krb_rm_reclen, {
"Record Length", "kerberos.rm.length", FT_UINT32, BASE_DEC,
NULL, KRB_RM_RECLEN, "Record length", HFILL }},
{ &hf_krb_provsrv_location, {
"PROVSRV Location", "kerberos.provsrv_location", FT_STRING, BASE_NONE,
NULL, 0, "PacketCable PROV SRV Location", HFILL }},
{ &hf_krb_smb_nt_status,
{ "NT Status", "kerberos.smb.nt_status", FT_UINT32, BASE_HEX,
VALS(NT_errors), 0, "NT Status code", HFILL }},
{ &hf_krb_smb_unknown,
{ "Unknown", "kerberos.smb.unknown", FT_UINT32, BASE_HEX,
NULL, 0, "unknown", HFILL }},
{ &hf_krb_address_ip, {
"IP Address", "kerberos.addr_ip", FT_IPv4, BASE_NONE,
NULL, 0, "IP Address", HFILL }},
{ &hf_krb_address_ipv6, {
"IPv6 Address", "kerberos.addr_ipv6", FT_IPv6, BASE_NONE,
NULL, 0, "IPv6 Address", HFILL }},
{ &hf_krb_address_netbios, {
"NetBIOS Address", "kerberos.addr_nb", FT_STRING, BASE_NONE,
NULL, 0, "NetBIOS Address and type", HFILL }},
#include "packet-kerberos-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_kerberos,
&ett_krb_recordmark,
#include "packet-kerberos-ettarr.c"
};
module_t *krb_module;
/* Register protocol */
proto_kerberos = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_kerberos, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register preferences */
krb_module = prefs_register_protocol(proto_kerberos, kerberos_prefs_apply_cb);
prefs_register_bool_preference(krb_module, "desegment",
"Reassemble Kerberos over TCP messages spanning multiple TCP segments",
"Whether the Kerberos 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.",
&krb_desegment);
#ifdef HAVE_KERBEROS
prefs_register_bool_preference(krb_module, "decrypt",
"Try to decrypt Kerberos blobs",
"Whether the dissector should try to decrypt "
"encrypted Kerberos blobs. This requires that the proper "
"keytab file is installed as well.", &krb_decrypt);
prefs_register_string_preference(krb_module, "file",
"Kerberos keytab file",
"The keytab file containing all the secrets",
&keytab_filename);
#endif
}
static int wrap_dissect_gss_kerb(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, guint8 *drep _U_)
{
tvbuff_t *auth_tvb;
auth_tvb = tvb_new_subset(
tvb, offset, tvb_length_remaining(tvb, offset),
tvb_reported_length_remaining(tvb, offset));
dissect_kerberos_main(auth_tvb, pinfo, tree, FALSE, NULL);
return tvb_length_remaining(tvb, offset);
}
static dcerpc_auth_subdissector_fns gss_kerb_auth_fns = {
wrap_dissect_gss_kerb, /* Bind */
wrap_dissect_gss_kerb, /* Bind ACK */
NULL, /* AUTH3 */
wrap_dissect_gssapi_verf, /* Request verifier */
wrap_dissect_gssapi_verf, /* Response verifier */
wrap_dissect_gssapi_payload, /* Request data */
wrap_dissect_gssapi_payload /* Response data */
};
/*--- proto_reg_handoff_kerberos ---------------------------------------*/
void
proto_reg_handoff_kerberos(void)
{
/*
dissector_handle_t kerberos_handle_tcp;
*/
krb4_handle = find_dissector("krb4");
kerberos_handle_udp = new_create_dissector_handle(dissect_kerberos_udp,
proto_kerberos);
/*
kerberos_handle_tcp = create_dissector_handle(dissect_kerberos_tcp,
proto_kerberos);
*/
dissector_add_uint("udp.port", UDP_PORT_KERBEROS, kerberos_handle_udp);
/*
dissector_add_uint("tcp.port", TCP_PORT_KERBEROS, kerberos_handle_tcp);
*/
register_dcerpc_auth_subdissector(DCE_C_AUTHN_LEVEL_PKT_INTEGRITY,
DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS,
&gss_kerb_auth_fns);
register_dcerpc_auth_subdissector(DCE_C_AUTHN_LEVEL_PKT_PRIVACY,
DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS,
&gss_kerb_auth_fns);
}
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