/* 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-05.txt * * and * * http://www.ietf.org/internet-drafts/draft-ietf-krb-wg-kerberos-referrals-03.txt * * Some structures from RFC2630 * * $Id$ * * Ethereal - Network traffic analyzer * By Gerald Combs * 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 #include #include #ifdef HAVE_LIBNETTLE #define HAVE_KERBEROS #ifdef _WIN32 #include #include #else #include #include #endif #include "crypt-md5.h" #include /* For keyfile manipulation */ #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "asn1.h" /* for "subid_t" */ #include #define UDP_PORT_KERBEROS 88 #define TCP_PORT_KERBEROS 88 static dissector_handle_t kerberos_handle_udp; /* Desegment Kerberos over TCP messages */ static gboolean krb_desegment = TRUE; static gint proto_kerberos = -1; static gint hf_krb_rm_reserved = -1; static gint hf_krb_rm_reclen = -1; static gint hf_krb_pac_signature_type = -1; static gint hf_krb_pac_signature_signature = -1; static gint hf_krb_pac_clientid = -1; static gint hf_krb_pac_namelen = -1; static gint hf_krb_pac_clientname = -1; static gint hf_krb_w2k_pac_entries = -1; static gint hf_krb_w2k_pac_version = -1; static gint hf_krb_w2k_pac_type = -1; static gint hf_krb_w2k_pac_size = -1; static gint hf_krb_w2k_pac_offset = -1; static gint hf_krb_padata = -1; static gint hf_krb_error_code = -1; static gint hf_krb_ticket = -1; static gint hf_krb_AP_REP_enc = -1; static gint hf_krb_KDC_REP_enc = -1; static gint hf_krb_tkt_vno = -1; static gint hf_krb_e_data = -1; static gint hf_krb_TransitedEncoding = -1; static gint hf_krb_PA_PAC_REQUEST_flag = -1; static gint hf_krb_encrypted_authenticator_data = -1; static gint hf_krb_PAC_LOGON_INFO = -1; static gint hf_krb_PAC_CREDENTIAL_TYPE = -1; static gint hf_krb_PAC_SERVER_CHECKSUM = -1; static gint hf_krb_PAC_PRIVSVR_CHECKSUM = -1; static gint hf_krb_PAC_CLIENT_INFO_TYPE = -1; static gint hf_krb_encrypted_PA_ENC_TIMESTAMP = -1; static gint hf_krb_checksum_checksum = -1; static gint hf_krb_encrypted_PRIV = -1; static gint hf_krb_encrypted_Ticket_data = -1; static gint hf_krb_encrypted_AP_REP_data = -1; static gint hf_krb_encrypted_KDC_REP_data = -1; static gint hf_krb_PA_DATA_type = -1; static gint hf_krb_PA_DATA_value = -1; static gint hf_krb_etype_info_salt = -1; static gint hf_krb_SAFE_BODY_user_data = -1; static gint hf_krb_realm = -1; static gint hf_krb_crealm = -1; static gint hf_krb_sname = -1; static gint hf_krb_cname = -1; static gint hf_krb_name_string = -1; static gint hf_krb_provsrv_location = -1; static gint hf_krb_e_text = -1; static gint hf_krb_name_type = -1; static gint hf_krb_lr_type = -1; static gint hf_krb_from = -1; static gint hf_krb_till = -1; static gint hf_krb_authtime = -1; static gint hf_krb_patimestamp = -1; static gint hf_krb_SAFE_BODY_timestamp = -1; static gint hf_krb_pausec = -1; static gint hf_krb_lr_time = -1; static gint hf_krb_starttime = -1; static gint hf_krb_endtime = -1; static gint hf_krb_key_expire = -1; static gint hf_krb_renew_till = -1; static gint hf_krb_rtime = -1; static gint hf_krb_ctime = -1; static gint hf_krb_cusec = -1; static gint hf_krb_stime = -1; static gint hf_krb_susec = -1; static gint hf_krb_SAFE_BODY_usec = -1; static gint hf_krb_nonce = -1; static gint hf_krb_transitedtype = -1; static gint hf_krb_transitedcontents = -1; static gint hf_krb_keytype = -1; static gint hf_krb_keyvalue = -1; static gint hf_krb_IF_RELEVANT_type = -1; static gint hf_krb_IF_RELEVANT_value = -1; static gint hf_krb_adtype = -1; static gint hf_krb_advalue = -1; static gint hf_krb_etype = -1; static gint hf_krb_etypes = -1; static gint hf_krb_LastReqs = -1; static gint hf_krb_IF_RELEVANT = -1; static gint hf_krb_addr_type = -1; static gint hf_krb_address_ip = -1; static gint hf_krb_address_netbios = -1; static gint hf_krb_msg_type = -1; static gint hf_krb_pvno = -1; static gint hf_krb_kvno = -1; static gint hf_krb_checksum_type = -1; static gint hf_krb_authenticator_vno = -1; static gint hf_krb_AuthorizationData = -1; static gint hf_krb_key = -1; static gint hf_krb_subkey = -1; static gint hf_krb_seq_number = -1; static gint hf_krb_EncTicketPart = -1; static gint hf_krb_EncAPRepPart = -1; static gint hf_krb_EncKDCRepPart = -1; static gint hf_krb_LastReq = -1; static gint hf_krb_Authenticator = -1; static gint hf_krb_Checksum = -1; static gint hf_krb_s_address = -1; static gint hf_krb_HostAddress = -1; static gint hf_krb_HostAddresses = -1; static gint hf_krb_APOptions = -1; static gint hf_krb_APOptions_use_session_key = -1; static gint hf_krb_APOptions_mutual_required = -1; static gint hf_krb_TicketFlags = -1; static gint hf_krb_TicketFlags_forwardable = -1; static gint hf_krb_TicketFlags_forwarded = -1; static gint hf_krb_TicketFlags_proxyable = -1; static gint hf_krb_TicketFlags_proxy = -1; static gint hf_krb_TicketFlags_allow_postdate = -1; static gint hf_krb_TicketFlags_postdated = -1; static gint hf_krb_TicketFlags_invalid = -1; static gint hf_krb_TicketFlags_renewable = -1; static gint hf_krb_TicketFlags_initial = -1; static gint hf_krb_TicketFlags_pre_auth = -1; static gint hf_krb_TicketFlags_hw_auth = -1; static gint hf_krb_TicketFlags_transited_policy_checked = -1; static gint hf_krb_TicketFlags_ok_as_delegate = -1; static gint hf_krb_KDCOptions = -1; static gint hf_krb_KDCOptions_forwardable = -1; static gint hf_krb_KDCOptions_forwarded = -1; static gint hf_krb_KDCOptions_proxyable = -1; static gint hf_krb_KDCOptions_proxy = -1; static gint hf_krb_KDCOptions_allow_postdate = -1; static gint hf_krb_KDCOptions_postdated = -1; static gint hf_krb_KDCOptions_renewable = -1; static gint hf_krb_KDCOptions_canonicalize = -1; static gint hf_krb_KDCOptions_opt_hardware_auth = -1; static gint hf_krb_KDCOptions_disable_transited_check = -1; static gint hf_krb_KDCOptions_renewable_ok = -1; static gint hf_krb_KDCOptions_enc_tkt_in_skey = -1; static gint hf_krb_KDCOptions_renew = -1; static gint hf_krb_KDCOptions_validate = -1; static gint hf_krb_KDC_REQ_BODY = -1; static gint hf_krb_PRIV_BODY = -1; static gint hf_krb_ENC_PRIV = -1; static gint hf_krb_authenticator_enc = -1; static gint hf_krb_ticket_enc = -1; static gint hf_krb_e_checksum = -1; static gint ett_krb_kerberos = -1; static gint ett_krb_TransitedEncoding = -1; static gint ett_krb_PAC_LOGON_INFO = -1; static gint ett_krb_PAC_CREDENTIAL_TYPE = -1; static gint ett_krb_PAC_SERVER_CHECKSUM = -1; static gint ett_krb_PAC_PRIVSVR_CHECKSUM = -1; static gint ett_krb_PAC_CLIENT_INFO_TYPE = -1; static gint ett_krb_KDC_REP_enc = -1; static gint ett_krb_EncTicketPart = -1; static gint ett_krb_EncAPRepPart = -1; static gint ett_krb_EncKDCRepPart = -1; static gint ett_krb_LastReq = -1; static gint ett_krb_Authenticator = -1; static gint ett_krb_Checksum = -1; static gint ett_krb_key = -1; static gint ett_krb_subkey = -1; static gint ett_krb_AuthorizationData = -1; static gint ett_krb_sname = -1; static gint ett_krb_cname = -1; static gint ett_krb_AP_REP_enc = -1; static gint ett_krb_padata = -1; static gint ett_krb_etypes = -1; static gint ett_krb_LastReqs = -1; static gint ett_krb_IF_RELEVANT = -1; static gint ett_krb_PA_DATA_tree = -1; static gint ett_krb_PAC = -1; static gint ett_krb_s_address = -1; static gint ett_krb_HostAddress = -1; static gint ett_krb_HostAddresses = -1; static gint ett_krb_authenticator_enc = -1; static gint ett_krb_AP_Options = -1; static gint ett_krb_KDC_Options = -1; static gint ett_krb_Ticket_Flags = -1; static gint ett_krb_request = -1; static gint ett_krb_recordmark = -1; static gint ett_krb_ticket = -1; static gint ett_krb_ticket_enc = -1; static gint ett_krb_PRIV = -1; static gint ett_krb_PRIV_enc = -1; static gint ett_krb_e_checksum = -1; guint32 krb5_errorcode; static int 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 */ static gboolean krb_decrypt = FALSE; /* keytab filename */ static char *keytab_filename = "insert filename here"; #endif #ifdef HAVE_MIT_KERBEROS #include #define MAX_ORIG_LEN 256 typedef struct _enc_key_t { struct _enc_key_t *next; krb5_keytab_entry key; char key_origin[MAX_ORIG_LEN+1]; } enc_key_t; static enc_key_t *enc_key_list=NULL; static void add_encryption_key(packet_info *pinfo, int keytype, int keylength, const char *keyvalue, char *origin) { enc_key_t *new_key; if(pinfo->fd->flags.visited){ return; } printf("added key in %d\n",pinfo->fd->num); new_key=g_malloc(sizeof(enc_key_t)); sprintf(new_key->key_origin, "%s learnt from frame %d",origin,pinfo->fd->num); new_key->next=enc_key_list; enc_key_list=new_key; new_key->key.principal=NULL; new_key->key.vno=0; new_key->key.key.enctype=keytype; new_key->key.key.length=keylength; new_key->key.key.contents=g_malloc(keylength); memcpy(new_key->key.key.contents, keyvalue, keylength); } static void read_keytab_file(char *filename, krb5_context *context) { krb5_keytab keytab; krb5_error_code ret; krb5_kt_cursor cursor; enc_key_t *new_key; /* should use a file in the ethereal users dir */ ret = krb5_kt_resolve(*context, filename, &keytab); if(ret){ fprintf(stderr, "KERBEROS ERROR: Could not open keytab file :%s\n",filename); return; } ret = krb5_kt_start_seq_get(*context, 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(*context, keytab, &(new_key->key), &cursor); if(ret==0){ int i; char *pos; /* generate origin string, describing where this key came from */ pos=new_key->key_origin; pos+=sprintf(pos, "keytab principal "); for(i=0;ikey.principal->length;i++){ pos+=sprintf(pos,"%s%s",(i?"/":""),(new_key->key.principal->data[i]).data); } pos+=sprintf(pos,"@%s",new_key->key.principal->realm.data); *pos=0; /*printf("added key for principal :%s\n", new_key->key_origin);*/ enc_key_list=new_key; } }while(ret==0); ret = krb5_kt_end_seq_get(*context, keytab, &cursor); if(ret){ krb5_kt_close(*context, keytab); } } static guint8 * decrypt_krb5_data(proto_tree *tree, packet_info *pinfo, krb5_keyusage usage, int length, const char *cryptotext, int keytype) { static int first_time=1; static krb5_context context; krb5_error_code ret; enc_key_t *ek; static krb5_data data = {0,0,NULL}; /* 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; ret = krb5_init_context(&context); if(ret){ return NULL; } read_keytab_file(keytab_filename, &context); } for(ek=enc_key_list;ek;ek=ek->next){ krb5_enc_data input; input.enctype = ek->key.key.enctype; input.ciphertext.length = length; input.ciphertext.data = (guint8 *)cryptotext; data.length = length; if(data.data){ g_free(data.data); } data.data = g_malloc(length); /* shortcircuit and bail out if enctypes are not matching */ if(ek->key.key.enctype!=keytype){ continue; } ret = krb5_c_decrypt(context, &(ek->key.key), usage, 0, &input, &data); if (ret == 0) { printf("woohoo decrypted keytype:%d in frame:%d\n", keytype, pinfo->fd->num); proto_tree_add_text(tree, NULL, 0, 0, "[Decrypted using: %s]", ek->key_origin); return data.data; } } return NULL; } #elif defined(HAVE_HEIMDAL_KERBEROS) #include #define MAX_ORIG_LEN 256 typedef struct _enc_key_t { struct _enc_key_t *next; krb5_keytab_entry key; char key_origin[MAX_ORIG_LEN+1]; } enc_key_t; static enc_key_t *enc_key_list=NULL; static void add_encryption_key(packet_info *pinfo, int keytype, int keylength, const char *keyvalue, char *origin) { enc_key_t *new_key; if(pinfo->fd->flags.visited){ return; } printf("added key in %d\n",pinfo->fd->num); new_key=g_malloc(sizeof(enc_key_t)); sprintf(new_key->key_origin, "%s learnt from frame %d",origin,pinfo->fd->num); new_key->next=enc_key_list; enc_key_list=new_key; new_key->key.principal=NULL; new_key->key.vno=0; new_key->key.keyblock.keytype=keytype; new_key->key.keyblock.keyvalue.length=keylength; new_key->key.keyblock.keyvalue.data=g_malloc(keylength); memcpy(new_key->key.keyblock.keyvalue.data, keyvalue, keylength); new_key->key.timestamp=0; } static void read_keytab_file(char *filename, krb5_context *context) { krb5_keytab keytab; krb5_error_code ret; krb5_kt_cursor cursor; enc_key_t *new_key; /* should use a file in the ethereal users dir */ ret = krb5_kt_resolve(*context, filename, &keytab); if(ret){ fprintf(stderr, "KERBEROS ERROR: Could not open keytab file :%s\n",filename); return; } ret = krb5_kt_start_seq_get(*context, 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(*context, keytab, &(new_key->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+=sprintf(pos, "keytab principal "); for(i=0;ikey.principal->name.name_string.len;i++){ pos+=sprintf(pos,"%s%s",(i?"/":""),new_key->key.principal->name.name_string.val[i]); } pos+=sprintf(pos,"@%s",new_key->key.principal->realm); *pos=0; enc_key_list=new_key; } }while(ret==0); ret = krb5_kt_end_seq_get(*context, keytab, &cursor); if(ret){ krb5_kt_close(*context, keytab); } } static guint8 * decrypt_krb5_data(proto_tree *tree, packet_info *pinfo, krb5_keyusage usage, int length, const char *cryptotext, int keytype) { static int first_time=1; static krb5_context context; 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; ret = krb5_init_context(&context); if(ret){ return NULL; } read_keytab_file(keytab_filename, &context); } for(ek=enc_key_list;ek;ek=ek->next){ krb5_crypto crypto; guint8 *cryptocopy; /* workaround for pre-0.6.1 heimdal bug */ /* shortcircuit and bail out if enctypes are not matching */ if(ek->key.keyblock.keytype!=keytype){ continue; } ret = krb5_crypto_init(context, &(ek->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(context, crypto, usage, cryptocopy, length, &data, NULL); g_free(cryptocopy); if (ret == 0) { printf("woohoo decrypted keytype:%d in frame:%d\n", keytype, pinfo->fd->num); proto_tree_add_text(tree, NULL, 0, 0, "[Decrypted using: %s]", ek->key_origin); krb5_crypto_destroy(context, crypto); return data.data; } krb5_crypto_destroy(context, crypto); } return NULL; } #elif defined (HAVE_LIBNETTLE) #define MAX_ORIG_LEN 256 #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[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, char *origin) { service_key_t *new_key; if(pinfo->fd->flags.visited){ return; } printf("added key in %d\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); sprintf(new_key->origin, "%s learnt from frame %d", 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 && sk->contents) g_free(sk->contents); if (sk) g_free(sk); } g_slist_free(service_key_list); service_key_list = NULL; } static void read_keytab_file(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 && 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 = 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); sprintf(sk->origin, "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 static guint8 * decrypt_krb5_data(proto_tree _U_ *tree, packet_info *pinfo, int _U_ usage, int length, const char *cryptotext, int keytype) { 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)){ 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); continue; } ENDTRY; 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:%d\n", keytype, pinfo->fd->num); plaintext = g_malloc(data_len); tvb_memcpy(encr_tvb, plaintext, CONFOUNDER_PLUS_CHECKSUM, data_len); tvb_free(encr_tvb); g_free(decrypted_data); return(plaintext); } } g_free(decrypted_data); return NULL; } #endif /* HAVE_MIT_KERBEROS / HAVE_HEIMDAL_KERBEROS / HAVE_LIBNETTLE */ /* TCP Record Mark */ #define KRB_RM_RESERVED 0x80000000L #define KRB_RM_RECLEN 0x7fffffffL #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_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_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 /* * 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_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 collissions here or we will have to come up with something better */ #define KRB5_PA_PAC_REQUEST 128 /* MS extension */ #define KRB5_PA_PROV_SRV_LOCATION 255 /* 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 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" }, { 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_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_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_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" }, { 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 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" }, { 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_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_ERROR, "KRB-ERROR" }, { 0, NULL }, }; static int dissect_krb5_application_choice(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_Authenticator(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_EncTicketPart(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_EncAPRepPart(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_EncKDCRepPart(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_KDC_REQ(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_KDC_REP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_AP_REQ(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_AP_REP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_SAFE(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_PRIV(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static int dissect_krb5_ERROR(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); static const ber_choice_t kerberos_applications_choice[] = { { KRB5_MSG_AUTHENTICATOR, BER_CLASS_APP, KRB5_MSG_AUTHENTICATOR, 0, dissect_krb5_Authenticator }, { KRB5_MSG_ENC_TICKET_PART, BER_CLASS_APP, KRB5_MSG_ENC_TICKET_PART, 0, dissect_krb5_EncTicketPart }, { KRB5_MSG_AS_REQ, BER_CLASS_APP, KRB5_MSG_AS_REQ, 0, dissect_krb5_KDC_REQ }, { KRB5_MSG_AS_REP, BER_CLASS_APP, KRB5_MSG_AS_REP, 0, dissect_krb5_KDC_REP }, { KRB5_MSG_TGS_REQ, BER_CLASS_APP, KRB5_MSG_TGS_REQ, 0, dissect_krb5_KDC_REQ }, { KRB5_MSG_TGS_REP, BER_CLASS_APP, KRB5_MSG_TGS_REP, 0, dissect_krb5_KDC_REP }, { KRB5_MSG_AP_REQ, BER_CLASS_APP, KRB5_MSG_AP_REQ, 0, dissect_krb5_AP_REQ }, { KRB5_MSG_AP_REP, BER_CLASS_APP, KRB5_MSG_AP_REP, 0, dissect_krb5_AP_REP }, { KRB5_MSG_ENC_AS_REP_PART, BER_CLASS_APP, KRB5_MSG_ENC_AS_REP_PART, 0, dissect_krb5_EncKDCRepPart }, { KRB5_MSG_ENC_TGS_REP_PART, BER_CLASS_APP, KRB5_MSG_ENC_TGS_REP_PART, 0, dissect_krb5_EncKDCRepPart }, { KRB5_MSG_ENC_AP_REP_PART, BER_CLASS_APP, KRB5_MSG_ENC_AP_REP_PART, 0, dissect_krb5_EncAPRepPart }, { KRB5_MSG_SAFE, BER_CLASS_APP, KRB5_MSG_SAFE, 0, dissect_krb5_SAFE }, { KRB5_MSG_PRIV, BER_CLASS_APP, KRB5_MSG_PRIV, 0, dissect_krb5_PRIV }, { KRB5_MSG_ERROR, BER_CLASS_APP, KRB5_MSG_ERROR, 0, dissect_krb5_ERROR }, { 0, 0, 0, 0, NULL } }; static int dissect_krb5_application_choice(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_choice(pinfo, tree, tvb, offset, kerberos_applications_choice, -1, -1); return offset; } static const true_false_string krb5_apoptions_use_session_key = { "USE SESSION KEY to encrypt the ticket", "Do NOT use the session key to encrypt the ticket" }; static const true_false_string krb5_apoptions_mutual_required = { "MUTUAL authentication is REQUIRED", "Mutual authentication is NOT required" }; static int *APOptions_bits[] = { &hf_krb_APOptions_use_session_key, &hf_krb_APOptions_mutual_required, NULL }; static int dissect_krb5_APOptions(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_bitstring32(FALSE, pinfo, tree, tvb, offset, APOptions_bits, hf_krb_APOptions, ett_krb_AP_Options, NULL); return offset; } static const true_false_string krb5_kdcoptions_forwardable = { "FORWARDABLE tickets are allowed/requested", "Do NOT use forwardable tickets" }; static const true_false_string krb5_kdcoptions_forwarded = { "This ticket has been FORWARDED", "This is NOT a forwarded ticket" }; static const true_false_string krb5_kdcoptions_proxyable = { "PROXIABLE tickets are allowed/requested", "Do NOT use proxiable tickets" }; static const true_false_string krb5_kdcoptions_proxy = { "This is a PROXY ticket", "This ticket has NOT been proxied" }; static const true_false_string krb5_kdcoptions_allow_postdate = { "We allow the ticket to be POSTDATED", "We do NOT allow the ticket to be postdated" }; static const true_false_string krb5_kdcoptions_postdated = { "This ticket is POSTDATED", "This ticket is NOT postdated" }; static const true_false_string krb5_kdcoptions_renewable = { "This ticket is RENEWABLE", "This ticket is NOT renewable" }; static const true_false_string krb5_kdcoptions_canonicalize = { "This is a request for a CANONICALIZED ticket", "This is NOT a canonicalized ticket request" }; static const true_false_string krb5_kdcoptions_disable_transited_check = { "Transited checking is DISABLED", "Transited checking is NOT disabled" }; static const true_false_string krb5_kdcoptions_renewable_ok = { "We accept RENEWED tickets", "We do NOT accept renewed tickets" }; static const true_false_string krb5_kdcoptions_enc_tkt_in_skey = { "ENCrypt TKT in SKEY", "Do NOT encrypt the tkt inside the skey" }; static const true_false_string krb5_kdcoptions_renew = { "This is a request to RENEW a ticket", "This is NOT a request to renew a ticket" }; static const true_false_string krb5_kdcoptions_validate = { "This is a request to VALIDATE a postdated ticket", "This is NOT a request to validate a postdated ticket" }; static int* KDCOptions_bits[] = { &hf_krb_KDCOptions_forwardable, &hf_krb_KDCOptions_forwarded, &hf_krb_KDCOptions_proxyable, &hf_krb_KDCOptions_proxy, &hf_krb_KDCOptions_allow_postdate, &hf_krb_KDCOptions_postdated, &hf_krb_KDCOptions_renewable, &hf_krb_KDCOptions_opt_hardware_auth, &hf_krb_KDCOptions_canonicalize, &hf_krb_KDCOptions_disable_transited_check, &hf_krb_KDCOptions_renewable_ok, &hf_krb_KDCOptions_enc_tkt_in_skey, &hf_krb_KDCOptions_renew, &hf_krb_KDCOptions_validate, NULL }; static int dissect_krb5_KDCOptions(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_bitstring32(FALSE, pinfo, tree, tvb, offset, KDCOptions_bits, hf_krb_KDCOptions, ett_krb_KDC_Options, NULL); return offset; } static int dissect_krb5_rtime(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralizedTime(FALSE, pinfo, tree, tvb, offset, hf_krb_rtime); return offset; } int dissect_krb5_ctime(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralizedTime(FALSE, pinfo, tree, tvb, offset, hf_krb_ctime); return offset; } static int dissect_krb5_cusec(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_cusec, NULL); return offset; } static int dissect_krb5_stime(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralizedTime(FALSE, pinfo, tree, tvb, offset, hf_krb_stime); return offset; } static int dissect_krb5_susec(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_susec, NULL); return offset; } static int dissect_krb5_error_code(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_error_code, &krb5_errorcode); if(krb5_errorcode && check_col(pinfo->cinfo, COL_INFO)) { col_add_fstr(pinfo->cinfo, COL_INFO, "KRB Error: %s", val_to_str(krb5_errorcode, krb5_error_codes, "Unknown error code %#x")); } return offset; } static int dissect_krb5_till(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralizedTime(FALSE, pinfo, tree, tvb, offset, hf_krb_till); return offset; } static int dissect_krb5_from(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralizedTime(FALSE, pinfo, tree, tvb, offset, hf_krb_from); return offset; } static int dissect_krb5_nonce(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_nonce, NULL); return offset; } /* * etype[8] SEQUENCE OF INTEGER, -- EncryptionType, */ static int dissect_krb5_etype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint32 etype; offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_etype, &etype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(etype, krb5_encryption_types, "%d")); } return offset; } static ber_sequence_t etype_sequence_of[1] = { { BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_krb5_etype }, }; static int dissect_krb5_etype_sequence_of(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence_of(FALSE, pinfo, tree, tvb, offset, etype_sequence_of, hf_krb_etypes, ett_krb_etypes); return offset; } static guint32 authenticator_etype; static int dissect_krb5_authenticator_etype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_etype, &authenticator_etype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(authenticator_etype, krb5_encryption_types, "%#x")); } return offset; } static guint32 Ticket_etype; static int dissect_krb5_Ticket_etype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_etype, &Ticket_etype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(Ticket_etype, krb5_encryption_types, "%#x")); } return offset; } static guint32 AP_REP_etype; static int dissect_krb5_AP_REP_etype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_etype, &AP_REP_etype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(AP_REP_etype, krb5_encryption_types, "%#x")); } return offset; } static guint32 PA_ENC_TIMESTAMP_etype; static int dissect_krb5_PA_ENC_TIMESTAMP_etype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_etype, &PA_ENC_TIMESTAMP_etype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(PA_ENC_TIMESTAMP_etype, krb5_encryption_types, "%#x")); } return offset; } /* * HostAddress ::= SEQUENCE { * addr-type[0] INTEGER, * address[1] OCTET STRING * } */ static guint32 addr_type; static int dissect_krb5_addr_type(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_addr_type, &addr_type); return offset; } static int dissect_krb5_address(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint8 class; gboolean pc; guint32 tag; guint32 len; char address_str[256]; proto_item *it=NULL; /* read header and len for the octet string */ offset=dissect_ber_identifier(pinfo, tree, tvb, offset, &class, &pc, &tag); offset=dissect_ber_length(pinfo, tree, tvb, offset, &len, NULL); address_str[0]=0; address_str[255]=0; switch(addr_type){ case KRB5_ADDR_IPv4: it=proto_tree_add_item(tree, hf_krb_address_ip, tvb, offset, 4, FALSE); sprintf(address_str,"%d.%d.%d.%d",tvb_get_guint8(tvb, offset),tvb_get_guint8(tvb, offset+1),tvb_get_guint8(tvb, offset+2),tvb_get_guint8(tvb, offset+3)); break; case KRB5_ADDR_NETBIOS: { char netbios_name[(NETBIOS_NAME_LEN - 1)*4 + 1]; int netbios_name_type; netbios_name_type = process_netbios_name(tvb_get_ptr(tvb, offset, 16), netbios_name); snprintf(address_str, 255, "%s<%02x>", netbios_name, netbios_name_type); it=proto_tree_add_string_format(tree, hf_krb_address_netbios, tvb, offset, 16, netbios_name, "NetBIOS Name: %s (%s)", address_str, netbios_name_type_descr(netbios_name_type)); } break; default: proto_tree_add_text(tree, tvb, offset, len, "KRB Address: I dont know how to parse this type of address yet"); } /* push it up two levels in the decode pane */ if(it){ proto_item_append_text(proto_item_get_parent(it), " %s",address_str); proto_item_append_text(proto_item_get_parent_nth(it, 2), " %s",address_str); } offset+=len; return offset; } static ber_sequence_t HostAddress_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_addr_type }, { BER_CLASS_CON, 1, 0, dissect_krb5_address }, { 0, 0, 0, NULL } }; static int dissect_krb5_HostAddress(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, HostAddress_sequence, hf_krb_HostAddress, ett_krb_HostAddress); return offset; } static int dissect_krb5_s_address(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, HostAddress_sequence, hf_krb_s_address, ett_krb_s_address); return offset; } /* * HostAddresses ::= SEQUENCE OF SEQUENCE { * addr-type[0] INTEGER, * address[1] OCTET STRING * } * */ static ber_sequence_t HostAddresses_sequence_of[1] = { { BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_krb5_HostAddress }, }; static int dissect_krb5_HostAddresses(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence_of(FALSE, pinfo, tree, tvb, offset, HostAddresses_sequence_of, hf_krb_HostAddresses, ett_krb_HostAddresses); return offset; } static int dissect_krb5_msg_type(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint32 msgtype; offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_msg_type, &msgtype); if (do_col_info & check_col(pinfo->cinfo, COL_INFO)) { col_add_str(pinfo->cinfo, COL_INFO, val_to_str(msgtype, krb5_msg_types, "Unknown msg type %#x")); } do_col_info=FALSE; /* append the application type to the subtree */ proto_item_append_text(tree, " %s", val_to_str(msgtype, krb5_msg_types, "Unknown:0x%x")); return offset; } static int dissect_krb5_pvno(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_pvno, NULL); return offset; } /* * PrincipalName ::= SEQUENCE { * name-type[0] INTEGER, * name-string[1] SEQUENCE OF GeneralString * } */ guint32 name_type; static int dissect_krb5_name_type(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_name_type, &name_type); if(tree){ proto_item_append_text(tree, " (%s):", val_to_str(name_type, krb5_princ_types, "Unknown:%d")); } return offset; } static char name_string_separator; static int dissect_krb5_name_string(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { char name_string[256]; offset=dissect_ber_GeneralString(pinfo, tree, tvb, offset, hf_krb_name_string, name_string, 255); if(tree){ proto_item_append_text(tree, "%c%s", name_string_separator, name_string); name_string_separator='/'; } return offset; } static ber_sequence_t name_stringe_sequence_of[1] = { { BER_CLASS_UNI, BER_UNI_TAG_GeneralString, BER_FLAGS_NOOWNTAG, dissect_krb5_name_string }, }; static int dissect_krb5_name_strings(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { name_string_separator=' '; offset=dissect_ber_sequence_of(FALSE, pinfo, tree, tvb, offset, name_stringe_sequence_of, -1, -1); return offset; } static ber_sequence_t PrincipalName_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_name_type }, { BER_CLASS_CON, 1, 0, dissect_krb5_name_strings }, { 0, 0, 0, NULL } }; static int dissect_krb5_sname(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, PrincipalName_sequence, hf_krb_sname, ett_krb_sname); return offset; } static int dissect_krb5_cname(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, PrincipalName_sequence, hf_krb_cname, ett_krb_cname); return offset; } static int dissect_krb5_realm(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralString(pinfo, tree, tvb, offset, hf_krb_realm, NULL, 0); return offset; } static int dissect_krb5_crealm(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralString(pinfo, tree, tvb, offset, hf_krb_crealm, NULL, 0); return offset; } static int dissect_krb5_PA_PAC_REQUEST_flag(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_boolean(pinfo, tree, tvb, offset, hf_krb_PA_PAC_REQUEST_flag); return offset; } static ber_sequence_t PA_PAC_REQUEST_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_PA_PAC_REQUEST_flag }, { 0, 0, 0, NULL } }; static int dissect_krb5_PA_PAC_REQUEST(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, PA_PAC_REQUEST_sequence, -1, -1); return offset; } static int dissect_krb5_PA_PROV_SRV_LOCATION(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralString(pinfo, tree, tvb, offset, hf_krb_provsrv_location, NULL, 0); return offset; } static int dissect_krb5_kvno(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_kvno, NULL); return offset; } static int dissect_krb5_seq_number(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_seq_number, NULL); return offset; } #ifdef HAVE_KERBEROS static int dissect_krb5_pausec(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_pausec, NULL); return offset; } static int dissect_krb5_patimestamp(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralizedTime(FALSE, pinfo, tree, tvb, offset, hf_krb_patimestamp); return offset; } static const ber_sequence_t PA_ENC_TS_ENC_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_patimestamp }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_pausec }, { 0, 0, 0, NULL } }; static int dissect_krb5_decrypt_PA_ENC_TIMESTAMP (packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint8 *plaintext=NULL; int length; length=tvb_length_remaining(tvb, offset); /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * AS-REQ PA_ENC_TIMESTAMP are encrypted with usage * == 1 */ if(!plaintext){ plaintext=decrypt_krb5_data(tree, pinfo, 1, length, tvb_get_ptr(tvb, offset, length), PA_ENC_TIMESTAMP_etype); } if(plaintext){ tvbuff_t *next_tvb; next_tvb = tvb_new_real_data (plaintext, length, length); tvb_set_child_real_data_tvbuff(tvb, next_tvb); /* Add the decrypted data to the data source list. */ add_new_data_source(pinfo, next_tvb, "Decrypted Krb5"); offset=dissect_ber_sequence(FALSE, pinfo, tree, next_tvb, 0, PA_ENC_TS_ENC_sequence, -1, -1); } return offset; } #endif static int dissect_krb5_encrypted_PA_ENC_TIMESTAMP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { #ifdef HAVE_KERBEROS offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_PA_ENC_TIMESTAMP, dissect_krb5_decrypt_PA_ENC_TIMESTAMP); #else offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_PA_ENC_TIMESTAMP, NULL); #endif return offset; } static ber_sequence_t PA_ENC_TIMESTAMP_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_PA_ENC_TIMESTAMP_etype }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_kvno }, { BER_CLASS_CON, 2, 0, dissect_krb5_encrypted_PA_ENC_TIMESTAMP }, { 0, 0, 0, NULL } }; static int dissect_krb5_PA_ENC_TIMESTAMP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, PA_ENC_TIMESTAMP_sequence, -1, -1); return offset; } static int dissect_krb5_etype_info_salt(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_octet_string(FALSE, pinfo, tree, tvb, offset, hf_krb_etype_info_salt, NULL); return offset; } static ber_sequence_t PA_ENCTYPE_INFO_ENTRY_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_etype }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_etype_info_salt }, { 0, 0, 0, NULL } }; static int dissect_krb5_PA_ENCTYPE_INFO_ENTRY(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, PA_ENCTYPE_INFO_ENTRY_sequence, -1, -1); return offset; } static ber_sequence_t PA_ENCTYPE_INFO_sequence_of[1] = { { BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_krb5_PA_ENCTYPE_INFO_ENTRY }, }; static int dissect_krb5_PA_ENCTYPE_INFO(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence_of(FALSE, pinfo, tree, tvb, offset, PA_ENCTYPE_INFO_sequence_of, -1, -1); return offset; } /* * PA-DATA ::= SEQUENCE { * padata-type[1] INTEGER, * padata-value[2] OCTET STRING, * -- might be encoded AP-REQ * } */ guint32 krb_PA_DATA_type; static int dissect_krb5_PA_DATA_type(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_PA_DATA_type, &krb_PA_DATA_type); krb_PA_DATA_type&=0xff; /*this is really just one single byte */ if(tree){ proto_item_append_text(tree, " %s", val_to_str(krb_PA_DATA_type, krb5_preauthentication_types, "Unknown:%d")); } return offset; } static int dissect_krb5_PA_DATA_value(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_tree *tree=parent_tree; if(ber_last_created_item){ tree=proto_item_add_subtree(ber_last_created_item, ett_krb_PA_DATA_tree); } switch(krb_PA_DATA_type){ case KRB5_PA_TGS_REQ: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_krb5_application_choice); break; case KRB5_PA_PK_AS_REQ: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_pkinit_PA_PK_AS_REQ); break; case KRB5_PA_PK_AS_REP: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_pkinit_PA_PK_AS_REP); break; case KRB5_PA_PAC_REQUEST: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_krb5_PA_PAC_REQUEST); break; case KRB5_PA_PROV_SRV_LOCATION: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_krb5_PA_PROV_SRV_LOCATION); break; case KRB5_PA_ENC_TIMESTAMP: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_krb5_PA_ENC_TIMESTAMP); break; case KRB5_PA_ENCTYPE_INFO: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, dissect_krb5_PA_ENCTYPE_INFO); break; default: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset,hf_krb_PA_DATA_value, NULL); } return offset; /*qqq*/ } static ber_sequence_t PA_DATA_sequence[] = { { BER_CLASS_CON, 1, 0, dissect_krb5_PA_DATA_type }, { BER_CLASS_CON, 2, 0, dissect_krb5_PA_DATA_value }, { 0, 0, 0, NULL } }; static int dissect_krb5_PA_DATA(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, PA_DATA_sequence, -1, -1); return offset; } /* * padata[3] SEQUENCE OF PA-DATA OPTIONAL, * */ static ber_sequence_t PA_DATA_sequence_of[1] = { { BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_krb5_PA_DATA }, }; static int dissect_krb5_padata(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence_of(FALSE, pinfo, tree, tvb, offset, PA_DATA_sequence_of, hf_krb_padata, ett_krb_padata); return offset; } static const true_false_string krb5_ticketflags_forwardable = { "FORWARDABLE tickets are allowed/requested", "Do NOT use forwardable tickets" }; static const true_false_string krb5_ticketflags_forwarded = { "This ticket has been FORWARDED", "This is NOT a forwarded ticket" }; static const true_false_string krb5_ticketflags_proxyable = { "PROXIABLE tickets are allowed/requested", "Do NOT use proxiable tickets" }; static const true_false_string krb5_ticketflags_proxy = { "This is a PROXY ticket", "This ticket has NOT been proxied" }; static const true_false_string krb5_ticketflags_allow_postdate = { "We allow the ticket to be POSTDATED", "We do NOT allow the ticket to be postdated" }; static const true_false_string krb5_ticketflags_postdated = { "This ticket is POSTDATED", "This ticket is NOT postdated" }; static const true_false_string krb5_ticketflags_invalid = { "This ticket is INVALID", "This ticket is NOT invalid" }; static const true_false_string krb5_ticketflags_renewable = { "This ticket is RENEWABLE", "This ticket is NOT renewable" }; static const true_false_string krb5_ticketflags_initial = { "This ticket was granted by AS and not TGT protocol", "This ticket was granted by TGT and not as protocol" }; static const true_false_string krb5_ticketflags_pre_auth = { "The client was PRE-AUTHenticated", "The client was NOT pre-authenticated" }; static const true_false_string krb5_ticketflags_hw_auth = { "The client was authenticated by HardWare", "The client was NOT authenticated using hardware" }; static const true_false_string krb5_ticketflags_transited_policy_checked = { "Kdc has performed TRANSITED POLICY CHECKING", "Kdc has NOT performed transited policy checking" }; static const true_false_string krb5_ticketflags_ok_as_delegate = { "This ticket is OK AS a DELEGATED ticket", "This ticket is NOT ok as a delegated ticket" }; static int* TicketFlags_bits[] = { &hf_krb_TicketFlags_forwardable, &hf_krb_TicketFlags_forwarded, &hf_krb_TicketFlags_proxyable, &hf_krb_TicketFlags_proxy, &hf_krb_TicketFlags_allow_postdate, &hf_krb_TicketFlags_postdated, &hf_krb_TicketFlags_invalid, &hf_krb_TicketFlags_renewable, &hf_krb_TicketFlags_initial, &hf_krb_TicketFlags_pre_auth, &hf_krb_TicketFlags_hw_auth, &hf_krb_TicketFlags_transited_policy_checked, &hf_krb_TicketFlags_ok_as_delegate, NULL }; static int dissect_krb5_TicketFlags(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_bitstring32(FALSE, pinfo, tree, tvb, offset, TicketFlags_bits, hf_krb_TicketFlags, ett_krb_Ticket_Flags, NULL); return offset; } static guint32 keytype; static int dissect_krb5_keytype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_keytype, &keytype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(keytype, krb5_encryption_types, "%#x")); } return offset; } static int keylength; static const char *keyvalue; static int store_keyvalue(packet_info *pinfo _U_, proto_tree *tree _U_, tvbuff_t *tvb, int offset) { keylength=tvb_length_remaining(tvb, offset); keyvalue=tvb_get_ptr(tvb, offset, keylength); return 0; } static int dissect_krb5_keyvalue(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_keyvalue, store_keyvalue); return offset; } /* * EncryptionKey ::= SEQUENCE { * keytype [0] int32 * keyvalue [1] octet string */ static ber_sequence_t EncryptionKey_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_keytype }, { BER_CLASS_CON, 1, 0, dissect_krb5_keyvalue }, { 0, 0, 0, NULL } }; static int dissect_krb5_key(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, EncryptionKey_sequence, hf_krb_key, ett_krb_key); #ifdef HAVE_KERBEROS add_encryption_key(pinfo, keytype, keylength, keyvalue, "key"); #endif return offset; } static int dissect_krb5_subkey(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, EncryptionKey_sequence, hf_krb_subkey, ett_krb_subkey); #ifdef HAVE_KERBEROS add_encryption_key(pinfo, keytype, keylength, keyvalue, "subkey"); #endif return offset; } static int dissect_krb5_PAC_LOGON_INFO(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item=NULL; proto_tree *tree=NULL; guint8 drep[4] = { 0x10, 0x00, 0x00, 0x00}; /* fake DREP struct */ dcerpc_info di; /* fake dcerpc_info struct */ void *old_private_data; item=proto_tree_add_item(parent_tree, hf_krb_PAC_LOGON_INFO, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); if(parent_tree){ tree=proto_item_add_subtree(item, ett_krb_PAC_LOGON_INFO); } /* skip the first 20 bytes, they look like a unique ndr pointer followed by (where did it come from?) a contect_handle ?*/ proto_tree_add_text(tree, tvb, offset, 20, "unknown: is this an undocumented policy handle?"); offset+=20; /* the PAC_LOGON_INFO blob */ /* fake whatever state the dcerpc runtime support needs */ di.conformant_run=0; di.call_data=NULL; old_private_data=pinfo->private_data; pinfo->private_data=&di; init_ndr_pointer_list(pinfo); offset = dissect_ndr_pointer(tvb, offset, pinfo, tree, drep, netlogon_dissect_PAC_LOGON_INFO, NDR_POINTER_REF, "PAC_LOGON_INFO:", -1); pinfo->private_data=old_private_data; return offset; } static int dissect_krb5_PAC_CREDENTIAL_TYPE(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item=NULL; proto_tree *tree=NULL; item=proto_tree_add_item(parent_tree, hf_krb_PAC_CREDENTIAL_TYPE, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); if(parent_tree){ tree=proto_item_add_subtree(item, ett_krb_PAC_CREDENTIAL_TYPE); } /*qqq*/ return offset; } static int dissect_krb5_PAC_SERVER_CHECKSUM(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item=NULL; proto_tree *tree=NULL; item=proto_tree_add_item(parent_tree, hf_krb_PAC_SERVER_CHECKSUM, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); if(parent_tree){ tree=proto_item_add_subtree(item, ett_krb_PAC_SERVER_CHECKSUM); } /* signature type */ proto_tree_add_item(tree, hf_krb_pac_signature_type, tvb, offset, 4, TRUE); offset+=4; /* signature data */ proto_tree_add_item(tree, hf_krb_pac_signature_signature, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); return offset; } static int dissect_krb5_PAC_PRIVSVR_CHECKSUM(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item=NULL; proto_tree *tree=NULL; item=proto_tree_add_item(parent_tree, hf_krb_PAC_PRIVSVR_CHECKSUM, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); if(parent_tree){ tree=proto_item_add_subtree(item, ett_krb_PAC_PRIVSVR_CHECKSUM); } /* signature type */ proto_tree_add_item(tree, hf_krb_pac_signature_type, tvb, offset, 4, TRUE); offset+=4; /* signature data */ proto_tree_add_item(tree, hf_krb_pac_signature_signature, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); return offset; } static int dissect_krb5_PAC_CLIENT_INFO_TYPE(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item=NULL; proto_tree *tree=NULL; guint16 namelen; char *name; item=proto_tree_add_item(parent_tree, hf_krb_PAC_CLIENT_INFO_TYPE, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); if(parent_tree){ tree=proto_item_add_subtree(item, ett_krb_PAC_CLIENT_INFO_TYPE); } /* clientid */ offset = dissect_nt_64bit_time(tvb, tree, offset, hf_krb_pac_clientid); /* name length */ namelen=tvb_get_letohs(tvb, offset); proto_tree_add_uint(tree, hf_krb_pac_namelen, tvb, offset, 2, namelen); offset+=2; /* client name */ name=tvb_fake_unicode(tvb, offset, namelen/2, TRUE); proto_tree_add_string(tree, hf_krb_pac_clientname, tvb, offset, namelen, name); g_free(name); offset+=namelen; return offset; } static int dissect_krb5_AD_WIN2K_PAC_struct(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint32 pac_type; guint32 pac_size; guint32 pac_offset; proto_item *it=NULL; proto_tree *tr=NULL; tvbuff_t *next_tvb; /* type of pac data */ pac_type=tvb_get_letohl(tvb, offset); it=proto_tree_add_uint(tree, hf_krb_w2k_pac_type, tvb, offset, 4, pac_type); if(it){ tr=proto_item_add_subtree(it, ett_krb_PAC); } offset += 4; /* size of pac data */ pac_size=tvb_get_letohl(tvb, offset); proto_tree_add_uint(tr, hf_krb_w2k_pac_size, tvb, offset, 4, pac_size); offset += 4; /* offset to pac data */ pac_offset=tvb_get_letohl(tvb, offset); proto_tree_add_uint(tr, hf_krb_w2k_pac_offset, tvb, offset, 4, pac_offset); offset += 8; next_tvb=tvb_new_subset(tvb, pac_offset, pac_size, pac_size); switch(pac_type){ case PAC_LOGON_INFO: dissect_krb5_PAC_LOGON_INFO(pinfo, tr, next_tvb, 0); break; case PAC_CREDENTIAL_TYPE: dissect_krb5_PAC_CREDENTIAL_TYPE(pinfo, tr, next_tvb, 0); break; case PAC_SERVER_CHECKSUM: dissect_krb5_PAC_SERVER_CHECKSUM(pinfo, tr, next_tvb, 0); break; case PAC_PRIVSVR_CHECKSUM: dissect_krb5_PAC_PRIVSVR_CHECKSUM(pinfo, tr, next_tvb, 0); break; case PAC_CLIENT_INFO_TYPE: dissect_krb5_PAC_CLIENT_INFO_TYPE(pinfo, tr, next_tvb, 0); break; default:; /*qqq*/ } return offset; } static int dissect_krb5_AD_WIN2K_PAC(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint32 entries; guint32 version; guint32 i; /* first in the PAC structure comes the number of entries */ entries=tvb_get_letohl(tvb, offset); proto_tree_add_uint(tree, hf_krb_w2k_pac_entries, tvb, offset, 4, entries); offset += 4; /* second comes the version */ version=tvb_get_letohl(tvb, offset); proto_tree_add_uint(tree, hf_krb_w2k_pac_version, tvb, offset, 4, version); offset += 4; for(i=0;idestport == UDP_PORT_KERBEROS && pinfo->ptype == PT_UDP) { conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, PT_UDP, pinfo->srcport, 0, NO_PORT_B); if (conversation == NULL) { conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst, PT_UDP, pinfo->srcport, 0, NO_PORT2); conversation_set_dissector(conversation, kerberos_handle_udp); } } offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, KDC_REQ_BODY_sequence, hf_krb_KDC_REQ_BODY, ett_krb_request); return offset; } /* * KDC-REQ ::= SEQUENCE { * pvno[1] INTEGER, * msg-type[2] INTEGER, * padata[3] SEQUENCE OF PA-DATA OPTIONAL, * req-body[4] KDC-REQ-BODY * } */ static ber_sequence_t KDC_REQ_sequence[] = { { BER_CLASS_CON, 1, 0, dissect_krb5_pvno }, { BER_CLASS_CON, 2, 0, dissect_krb5_msg_type }, { BER_CLASS_CON, 3, BER_FLAGS_OPTIONAL, dissect_krb5_padata }, { BER_CLASS_CON, 4, 0, dissect_krb5_KDC_REQ_BODY }, { 0, 0, 0, NULL } }; static int dissect_krb5_KDC_REQ(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, KDC_REQ_sequence, -1, -1); return offset; } #ifdef HAVE_KERBEROS static int dissect_krb5_decrypt_authenticator_data (packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { 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, pinfo, 7, length, tvb_get_ptr(tvb, offset, length), authenticator_etype); } if(!plaintext){ plaintext=decrypt_krb5_data(tree, pinfo, 11, length, tvb_get_ptr(tvb, offset, length), authenticator_etype); } if(plaintext){ tvbuff_t *next_tvb; next_tvb = tvb_new_real_data (plaintext, length, length); tvb_set_child_real_data_tvbuff(tvb, next_tvb); /* Add the decrypted data to the data source list. */ add_new_data_source(pinfo, next_tvb, "Decrypted Krb5"); offset=dissect_ber_choice(pinfo, tree, next_tvb, 0, kerberos_applications_choice, -1, -1); } return offset; } #endif /* * EncryptedData ::= SEQUENCE { * etype[0] INTEGER, -- EncryptionType * kvno[1] INTEGER OPTIONAL, * cipher[2] OCTET STRING -- ciphertext * } */ static int dissect_krb5_encrypted_authenticator_data(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { #ifdef HAVE_KERBEROS offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_authenticator_data, dissect_krb5_decrypt_authenticator_data); #else offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_authenticator_data, NULL); #endif return offset; } static ber_sequence_t encrypted_authenticator_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_authenticator_etype }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_kvno }, { BER_CLASS_CON, 2, 0, dissect_krb5_encrypted_authenticator_data }, { 0, 0, 0, NULL } }; static int dissect_krb5_encrypted_authenticator(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, encrypted_authenticator_sequence, hf_krb_authenticator_enc, ett_krb_authenticator_enc); return offset; } static int dissect_krb5_tkt_vno(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_tkt_vno, NULL); return offset; } #ifdef HAVE_KERBEROS static int dissect_krb5_decrypt_Ticket_data (packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint8 *plaintext; int length; length=tvb_length_remaining(tvb, offset); /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * All Ticket encrypted parts use usage == 2 */ if( (plaintext=decrypt_krb5_data(tree, pinfo, 2, length, tvb_get_ptr(tvb, offset, length), Ticket_etype)) ){ tvbuff_t *next_tvb; next_tvb = tvb_new_real_data (plaintext, length, length); tvb_set_child_real_data_tvbuff(tvb, next_tvb); /* Add the decrypted data to the data source list. */ add_new_data_source(pinfo, next_tvb, "Decrypted Krb5"); offset=dissect_ber_choice(pinfo, tree, next_tvb, 0, kerberos_applications_choice, -1, -1); } return offset; } #endif static int dissect_krb5_encrypted_Ticket_data(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { #ifdef HAVE_KERBEROS offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_Ticket_data, dissect_krb5_decrypt_Ticket_data); #else offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_Ticket_data, NULL); #endif return offset; } static ber_sequence_t encrypted_Ticket_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_Ticket_etype }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_kvno }, { BER_CLASS_CON, 2, 0, dissect_krb5_encrypted_Ticket_data }, { 0, 0, 0, NULL } }; static int dissect_krb5_Ticket_encrypted(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, encrypted_Ticket_sequence, hf_krb_ticket_enc, ett_krb_ticket_enc); return offset; } static ber_sequence_t Application_1_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_tkt_vno }, { BER_CLASS_CON, 1, 0, dissect_krb5_realm }, { BER_CLASS_CON, 2, 0, dissect_krb5_sname }, { BER_CLASS_CON, 3, 0, dissect_krb5_Ticket_encrypted }, { 0, 0, 0, NULL } }; static int dissect_krb5_Application_1(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, Application_1_sequence, hf_krb_ticket, ett_krb_ticket); return offset; } static const ber_choice_t Ticket_choice[] = { { 1, BER_CLASS_APP, 1, 0, dissect_krb5_Application_1 }, { 0, 0, 0, 0, NULL } }; static int dissect_krb5_Ticket(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_choice(pinfo, tree, tvb, offset, Ticket_choice, -1, -1); return offset; } /* * AP-REQ ::= [APPLICATION 14] SEQUENCE { * pvno[0] INTEGER, * msg-type[1] INTEGER, * ap-options[2] APOptions, * ticket[3] Ticket, * authenticator[4] EncryptedData * } */ static ber_sequence_t AP_REQ_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_pvno }, { BER_CLASS_CON, 1, 0, dissect_krb5_msg_type }, { BER_CLASS_CON, 2, 0, dissect_krb5_APOptions }, { BER_CLASS_CON, 3, 0, dissect_krb5_Ticket }, { BER_CLASS_CON, 4, 0, dissect_krb5_encrypted_authenticator }, { 0, 0, 0, NULL } }; static int dissect_krb5_AP_REQ(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, AP_REQ_sequence, -1, -1); return offset; } #ifdef HAVE_KERBEROS static int dissect_krb5_decrypt_AP_REP_data(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { 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, pinfo, 12, length, tvb_get_ptr(tvb, offset, length), AP_REP_etype); } if(plaintext){ tvbuff_t *next_tvb; next_tvb = tvb_new_real_data (plaintext, length, length); tvb_set_child_real_data_tvbuff(tvb, next_tvb); /* Add the decrypted data to the data source list. */ add_new_data_source(pinfo, next_tvb, "Decrypted Krb5"); offset=dissect_ber_choice(pinfo, tree, next_tvb, 0, kerberos_applications_choice, -1, -1); } return offset; } #endif static int dissect_krb5_encrypted_AP_REP_data(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { #ifdef HAVE_KERBEROS offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_AP_REP_data, dissect_krb5_decrypt_AP_REP_data); #else offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_AP_REP_data, NULL); #endif return offset; } static ber_sequence_t encrypted_AP_REP_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_AP_REP_etype }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_kvno }, { BER_CLASS_CON, 2, 0, dissect_krb5_encrypted_AP_REP_data }, { 0, 0, 0, NULL } }; static int dissect_krb5_encrypted_AP_REP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, encrypted_AP_REP_sequence, hf_krb_AP_REP_enc, ett_krb_AP_REP_enc); return offset; } /* * AP-REP ::= [APPLICATION 15] SEQUENCE { * pvno[0] INTEGER, * msg-type[1] INTEGER, * enc-part[2] EncryptedData * } */ static ber_sequence_t AP_REP_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_pvno }, { BER_CLASS_CON, 1, 0, dissect_krb5_msg_type }, { BER_CLASS_CON, 2, 0, dissect_krb5_encrypted_AP_REP }, { 0, 0, 0, NULL } }; static int dissect_krb5_AP_REP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, AP_REP_sequence, -1, -1); return offset; } static guint32 KDC_REP_etype; static int dissect_krb5_KDC_REP_etype(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_integer(FALSE, pinfo, tree, tvb, offset, hf_krb_etype, &KDC_REP_etype); if(tree){ proto_item_append_text(tree, " %s", val_to_str(KDC_REP_etype, krb5_encryption_types, "%#x")); } return offset; } #ifdef HAVE_KERBEROS static int dissect_krb5_decrypt_KDC_REP_data (packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { guint8 *plaintext=NULL; int length; length=tvb_length_remaining(tvb, offset); /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * ASREP/TGSREP encryptedparts are encrypted with usage * == 3 or * == 8 or * == 9 */ if(!plaintext){ plaintext=decrypt_krb5_data(tree, pinfo, 3, length, tvb_get_ptr(tvb, offset, length), KDC_REP_etype); } if(!plaintext){ plaintext=decrypt_krb5_data(tree, pinfo, 8, length, tvb_get_ptr(tvb, offset, length), KDC_REP_etype); } if(!plaintext){ plaintext=decrypt_krb5_data(tree, pinfo, 9, length, tvb_get_ptr(tvb, offset, length), KDC_REP_etype); } if(plaintext){ tvbuff_t *next_tvb; next_tvb = tvb_new_real_data (plaintext, length, length); tvb_set_child_real_data_tvbuff(tvb, next_tvb); /* Add the decrypted data to the data source list. */ add_new_data_source(pinfo, next_tvb, "Decrypted Krb5"); offset=dissect_ber_choice(pinfo, tree, next_tvb, 0, kerberos_applications_choice, -1, -1); } return offset; } #endif static int dissect_krb5_encrypted_KDC_REP_data(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { #ifdef HAVE_KERBEROS offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_KDC_REP_data, dissect_krb5_decrypt_KDC_REP_data); #else offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_encrypted_KDC_REP_data, NULL); #endif return offset; } static ber_sequence_t encrypted_KDC_REP_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_KDC_REP_etype }, { BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL, dissect_krb5_kvno }, { BER_CLASS_CON, 2, 0, dissect_krb5_encrypted_KDC_REP_data }, { 0, 0, 0, NULL } }; static int dissect_krb5_encrypted_KDC_REP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, encrypted_KDC_REP_sequence, hf_krb_KDC_REP_enc, ett_krb_KDC_REP_enc); return offset; } /* * KDC-REP ::= SEQUENCE { * pvno[0] INTEGER, * msg-type[1] INTEGER, * padata[2] SEQUENCE OF PA-DATA OPTIONAL, * crealm[3] Realm, * cname[4] PrincipalName, * ticket[5] Ticket, * enc-part[6] EncryptedData * } */ static ber_sequence_t KDC_REP_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_pvno }, { BER_CLASS_CON, 1, 0, dissect_krb5_msg_type }, { BER_CLASS_CON, 2, BER_FLAGS_OPTIONAL, dissect_krb5_padata }, { BER_CLASS_CON, 3, 0, dissect_krb5_crealm }, { BER_CLASS_CON, 4, 0, dissect_krb5_cname }, { BER_CLASS_CON, 5, 0, dissect_krb5_Ticket }, { BER_CLASS_CON, 6, 0, dissect_krb5_encrypted_KDC_REP }, { 0, 0, 0, NULL } }; static int dissect_krb5_KDC_REP(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, KDC_REP_sequence, -1, -1); return offset; } static int dissect_krb5_e_text(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_GeneralString(pinfo, tree, tvb, offset, hf_krb_e_text, NULL, 0); return offset; } static int dissect_krb5_e_data(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { switch(krb5_errorcode){ case KRB5_ET_KRB5KDC_ERR_PREAUTH_REQUIRED: offset=dissect_ber_octet_string_wcb(FALSE, pinfo, tree, tvb, offset, hf_krb_e_data, dissect_krb5_padata); break; default: offset=dissect_ber_octet_string(FALSE, pinfo, tree, tvb, offset, hf_krb_e_data, NULL); } return offset; } /* This optional field in KRB_ERR is used by the early drafts which * PacketCable still use. */ static int dissect_krb5_e_checksum(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, Checksum_sequence, hf_krb_e_checksum, ett_krb_e_checksum); return offset; } /* * KRB-ERROR ::= [APPLICATION 30] SEQUENCE { * pvno[0] INTEGER, * msg-type[1] INTEGER, * ctime[2] KerberosTime OPTIONAL, * cusec[3] INTEGER OPTIONAL, * stime[4] KerberosTime, * susec[5] INTEGER, * error-code[6] INTEGER, * crealm[7] Realm OPTIONAL, * cname[8] PrincipalName OPTIONAL, * realm[9] Realm, -- Correct realm * sname[10] PrincipalName, -- Correct name * e-text[11] GeneralString OPTIONAL, * e-data[12] OCTET STRING OPTIONAL * } * * e-data This field contains additional data about the error for use * by the application to help it recover from or handle the * error. If the errorcode is KDC_ERR_PREAUTH_REQUIRED, then * the e-data field will contain an encoding of a sequence of * padata fields, each corresponding to an acceptable pre- * authentication method and optionally containing data for * the method: */ static ber_sequence_t ERROR_sequence[] = { { BER_CLASS_CON, 0, 0, dissect_krb5_pvno }, { BER_CLASS_CON, 1, 0, dissect_krb5_msg_type }, { BER_CLASS_CON, 2, BER_FLAGS_OPTIONAL, dissect_krb5_ctime }, { BER_CLASS_CON, 3, BER_FLAGS_OPTIONAL, dissect_krb5_cusec }, { BER_CLASS_CON, 4, 0, dissect_krb5_stime }, { BER_CLASS_CON, 5, 0, dissect_krb5_susec }, { BER_CLASS_CON, 6, 0, dissect_krb5_error_code }, { BER_CLASS_CON, 7, BER_FLAGS_OPTIONAL, dissect_krb5_crealm }, { BER_CLASS_CON, 8, BER_FLAGS_OPTIONAL, dissect_krb5_cname }, { BER_CLASS_CON, 9, 0, dissect_krb5_realm }, { BER_CLASS_CON, 10, 0, dissect_krb5_sname }, { BER_CLASS_CON, 11, BER_FLAGS_OPTIONAL, dissect_krb5_e_text }, { BER_CLASS_CON, 12, BER_FLAGS_OPTIONAL, dissect_krb5_e_data }, { BER_CLASS_CON, 13, BER_FLAGS_OPTIONAL, dissect_krb5_e_checksum }, /* used by PacketCable */ { 0, 0, 0, NULL } }; static int dissect_krb5_ERROR(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset) { offset=dissect_ber_sequence(FALSE, pinfo, tree, tvb, offset, ERROR_sequence, -1, -1); return offset; } static struct { char *set; char *unset; } bitval = { "Set", "Not set" }; static void dissect_kerberos_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); static void dissect_kerberos_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); static gint dissect_kerberos_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int do_col_info, gboolean have_rm, kerberos_callbacks *cb); static gint kerberos_rm_to_reclen(guint krb_rm); static void dissect_kerberos_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); static guint get_krb_pdu_len(tvbuff_t *tvb, int offset); 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, cb)); } static void dissect_kerberos_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5"); (void)dissect_kerberos_common(tvb, pinfo, tree, TRUE, FALSE, NULL); } static gint kerberos_rm_to_reclen(guint krb_rm) { return (krb_rm & KRB_RM_RECLEN); } static guint get_krb_pdu_len(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 dissect_kerberos_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { pinfo->fragmented = TRUE; if (dissect_kerberos_common(tvb, pinfo, tree, TRUE, TRUE, NULL) < 0) { /* * The dissector failed to recognize this as a valid * Kerberos message. Mark it as a continuation packet. */ if (check_col(pinfo->cinfo, COL_INFO)) { col_set_str(pinfo->cinfo, COL_INFO, "Continuation"); } } } static void dissect_kerberos_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5"); tcp_dissect_pdus(tvb, pinfo, tree, krb_desegment, 4, get_krb_pdu_len, dissect_kerberos_tcp_pdu); } /* * Display the TCP record mark. */ static 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); } static gint dissect_kerberos_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int dci, gboolean have_rm, kerberos_callbacks *cb) { int offset = 0; proto_tree *kerberos_tree = NULL; proto_item *item = NULL; void *saved_private_data; /* 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 (tree) { item = proto_tree_add_item(tree, proto_kerberos, tvb, 0, -1, FALSE); kerberos_tree = proto_item_add_subtree(item, ett_krb_kerberos); } 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); } show_krb_recordmark(kerberos_tree, tvb, offset, krb_rm); offset += 4; } offset=dissect_ber_choice(pinfo, kerberos_tree, tvb, offset, kerberos_applications_choice, -1, -1); proto_item_set_len(item, offset); pinfo->private_data=saved_private_data; return offset; } void kerberos_prefs_apply_cb(void) { #ifdef HAVE_LIBNETTLE clear_keytab(); read_keytab_file(keytab_filename); #endif } void proto_register_kerberos(void) { 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_transitedtype, { "Type", "kerberos.transited.type", FT_UINT32, BASE_DEC, VALS(krb5_transited_types), 0, "Transited Type", HFILL }}, { &hf_krb_transitedcontents, { "Contents", "kerberos.transited.contents", FT_BYTES, BASE_HEX, NULL, 0, "Transitent Contents string", HFILL }}, { &hf_krb_keytype, { "Key type", "kerberos.keytype", FT_UINT32, BASE_DEC, VALS(krb5_encryption_types), 0, "Key Type", HFILL }}, { &hf_krb_keyvalue, { "Key value", "kerberos.keyvalue", FT_BYTES, BASE_HEX, NULL, 0, "Key value (encryption key)", HFILL }}, { &hf_krb_adtype, { "Type", "kerberos.adtype", FT_UINT32, BASE_DEC, VALS(krb5_ad_types), 0, "Authorization Data Type", HFILL }}, { &hf_krb_IF_RELEVANT_type, { "Type", "kerberos.IF_RELEVANT.type", FT_UINT32, BASE_DEC, VALS(krb5_ad_types), 0, "IF-RELEVANT Data Type", HFILL }}, { &hf_krb_advalue, { "Data", "kerberos.advalue", FT_BYTES, BASE_HEX, NULL, 0, "Authentication Data", HFILL }}, { &hf_krb_IF_RELEVANT_value, { "Data", "kerberos.IF_RELEVANT.value", FT_BYTES, BASE_HEX, NULL, 0, "IF_RELEVANT Data", HFILL }}, { &hf_krb_etype, { "Encryption type", "kerberos.etype", FT_INT32, BASE_DEC, VALS(krb5_encryption_types), 0, "Encryption Type", HFILL }}, { &hf_krb_addr_type, { "Addr-type", "kerberos.addr_type", FT_UINT32, BASE_DEC, VALS(krb5_address_types), 0, "Address Type", HFILL }}, { &hf_krb_pac_signature_type, { "Type", "kerberos.pac.signature.type", FT_INT32, BASE_DEC, NULL, 0, "PAC Signature Type", HFILL }}, { &hf_krb_name_type, { "Name-type", "kerberos.name_type", FT_INT32, BASE_DEC, VALS(krb5_princ_types), 0, "Type of principal name", HFILL }}, { &hf_krb_lr_type, { "Lr-type", "kerberos.lr_type", FT_UINT32, BASE_DEC, VALS(krb5_lr_types), 0, "Type of lastreq value", HFILL }}, { &hf_krb_address_ip, { "IP Address", "kerberos.addr_ip", FT_IPv4, BASE_NONE, NULL, 0, "IP Address", HFILL }}, { &hf_krb_address_netbios, { "NetBIOS Address", "kerberos.addr_nb", FT_STRING, BASE_NONE, NULL, 0, "NetBIOS Address and type", HFILL }}, { &hf_krb_authtime, { "Authtime", "kerberos.authtime", FT_STRING, BASE_NONE, NULL, 0, "Time of initial authentication", HFILL }}, { &hf_krb_SAFE_BODY_timestamp, { "Timestamp", "kerberos.SAFE_BODY.timestamp", FT_STRING, BASE_NONE, NULL, 0, "Timestamp of this SAFE_BODY", HFILL }}, { &hf_krb_patimestamp, { "patimestamp", "kerberos.patimestamp", FT_STRING, BASE_NONE, NULL, 0, "Time of client", HFILL }}, { &hf_krb_pausec, { "pausec", "kerberos.pausec", FT_UINT32, BASE_DEC, NULL, 0, "Microsecond component of client time", HFILL }}, { &hf_krb_lr_time, { "Lr-time", "kerberos.lr_time", FT_STRING, BASE_NONE, NULL, 0, "Time of LR-entry", HFILL }}, { &hf_krb_starttime, { "Start time", "kerberos.starttime", FT_STRING, BASE_NONE, NULL, 0, "The time after which the ticket is valid", HFILL }}, { &hf_krb_endtime, { "End time", "kerberos.endtime", FT_STRING, BASE_NONE, NULL, 0, "The time after which the ticket has expired", HFILL }}, { &hf_krb_key_expire, { "Key Expiration", "kerberos.key_expiration", FT_STRING, BASE_NONE, NULL, 0, "The time after which the key will expire", HFILL }}, { &hf_krb_renew_till, { "Renew-till", "kerberos.renenw_till", FT_STRING, BASE_NONE, NULL, 0, "The maximum time we can renew the ticket until", HFILL }}, { &hf_krb_rtime, { "rtime", "kerberos.rtime", FT_STRING, BASE_NONE, NULL, 0, "Renew Until timestamp", HFILL }}, { &hf_krb_ctime, { "ctime", "kerberos.ctime", FT_STRING, BASE_NONE, NULL, 0, "Current Time on the client host", HFILL }}, { &hf_krb_cusec, { "cusec", "kerberos.cusec", FT_UINT32, BASE_DEC, NULL, 0, "micro second component of client time", HFILL }}, { &hf_krb_SAFE_BODY_usec, { "usec", "kerberos.SAFE_BODY.usec", FT_UINT32, BASE_DEC, NULL, 0, "micro second component of SAFE_BODY time", HFILL }}, { &hf_krb_stime, { "stime", "kerberos.stime", FT_STRING, BASE_NONE, NULL, 0, "Current Time on the server host", HFILL }}, { &hf_krb_susec, { "susec", "kerberos.susec", FT_UINT32, BASE_DEC, NULL, 0, "micro second component of server time", HFILL }}, { &hf_krb_error_code, { "error_code", "kerberos.error_code", FT_UINT32, BASE_DEC, VALS(krb5_error_codes), 0, "Kerberos error code", HFILL }}, { &hf_krb_from, { "from", "kerberos.from", FT_STRING, BASE_NONE, NULL, 0, "From when the ticket is to be valid (postdating)", HFILL }}, { &hf_krb_till, { "till", "kerberos.till", FT_STRING, BASE_NONE, NULL, 0, "When the ticket will expire", HFILL }}, { &hf_krb_name_string, { "Name", "kerberos.name_string", FT_STRING, BASE_NONE, NULL, 0, "String component that is part of a PrincipalName", HFILL }}, { &hf_krb_provsrv_location, { "PROVSRV Location", "kerberos.provsrv_location", FT_STRING, BASE_NONE, NULL, 0, "PacketCable PROV SRV Location", HFILL }}, { &hf_krb_e_text, { "e-text", "kerberos.e_text", FT_STRING, BASE_NONE, NULL, 0, "Additional (human readable) error description", HFILL }}, { &hf_krb_realm, { "Realm", "kerberos.realm", FT_STRING, BASE_NONE, NULL, 0, "Name of the Kerberos Realm", HFILL }}, { &hf_krb_crealm, { "Client Realm", "kerberos.crealm", FT_STRING, BASE_NONE, NULL, 0, "Name of the Clients Kerberos Realm", HFILL }}, { &hf_krb_pac_clientname, { "Name", "kerberos.pac.name", FT_STRING, BASE_NONE, NULL, 0, "Name of the Client in the PAC structure", HFILL }}, { &hf_krb_msg_type, { "MSG Type", "kerberos.msg.type", FT_UINT32, BASE_DEC, VALS(krb5_msg_types), 0, "Kerberos Message Type", HFILL }}, { &hf_krb_APOptions, { "APOptions", "kerberos.apoptions", FT_BYTES, BASE_HEX, NULL, 0, "Kerberos APOptions bitstring", HFILL }}, { &hf_krb_APOptions_use_session_key, { "Use Session Key", "kerberos.apoptions.use_session_key", FT_BOOLEAN, 32, TFS(&krb5_apoptions_use_session_key), 0x40000000, "", HFILL }}, { &hf_krb_APOptions_mutual_required, { "Mutual required", "kerberos.apoptions.mutual_required", FT_BOOLEAN, 32, TFS(&krb5_apoptions_mutual_required), 0x20000000, "", HFILL }}, { &hf_krb_KDCOptions, { "KDCOptions", "kerberos.kdcoptions", FT_BYTES, BASE_HEX, NULL, 0, "Kerberos KDCOptions bitstring", HFILL }}, { &hf_krb_TicketFlags, { "Ticket Flags", "kerberos.ticketflags", FT_NONE, BASE_NONE, NULL, 0, "Kerberos Ticket Flags", HFILL }}, { &hf_krb_TicketFlags_forwardable, { "Forwardable", "kerberos.ticketflags.forwardable", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_forwardable), 0x40000000, "Flag controlling whether the tickes are forwardable or not", HFILL }}, { &hf_krb_TicketFlags_forwarded, { "Forwarded", "kerberos.ticketflags.forwarded", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_forwarded), 0x20000000, "Has this ticket been forwarded?", HFILL }}, { &hf_krb_TicketFlags_proxyable, { "Proxyable", "kerberos.ticketflags.proxyable", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_proxyable), 0x10000000, "Flag controlling whether the tickes are proxyable or not", HFILL }}, { &hf_krb_TicketFlags_proxy, { "Proxy", "kerberos.ticketflags.proxy", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_proxy), 0x08000000, "Has this ticket been proxied?", HFILL }}, { &hf_krb_TicketFlags_allow_postdate, { "Allow Postdate", "kerberos.ticketflags.allow_postdate", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_allow_postdate), 0x04000000, "Flag controlling whether we allow postdated tickets or not", HFILL }}, { &hf_krb_TicketFlags_postdated, { "Postdated", "kerberos.ticketflags.postdated", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_postdated), 0x02000000, "Whether this ticket is postdated or not", HFILL }}, { &hf_krb_TicketFlags_invalid, { "Invalid", "kerberos.ticketflags.invalid", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_invalid), 0x01000000, "Whether this ticket is invalid or not", HFILL }}, { &hf_krb_TicketFlags_renewable, { "Renewable", "kerberos.ticketflags.renewable", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_renewable), 0x00800000, "Whether this ticket is renewable or not", HFILL }}, { &hf_krb_TicketFlags_initial, { "Initial", "kerberos.ticketflags.initial", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_initial), 0x00400000, "Whether this ticket is an initial ticket or not", HFILL }}, { &hf_krb_TicketFlags_pre_auth, { "Pre-Auth", "kerberos.ticketflags.pre_auth", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_pre_auth), 0x00200000, "Whether this ticket is pre-authenticated or not", HFILL }}, { &hf_krb_TicketFlags_hw_auth, { "HW-Auth", "kerberos.ticketflags.hw_auth", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_hw_auth), 0x00100000, "Whether this ticket is hardware-authenticated or not", HFILL }}, { &hf_krb_TicketFlags_transited_policy_checked, { "Transited Policy Checked", "kerberos.ticketflags.transited_policy_checked", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_transited_policy_checked), 0x00080000, "Whether this ticket is transited policy checked or not", HFILL }}, { &hf_krb_TicketFlags_ok_as_delegate, { "Ok As Delegate", "kerberos.ticketflags.ok_as_delegate", FT_BOOLEAN, 32, TFS(&krb5_ticketflags_ok_as_delegate), 0x00040000, "Whether this ticket is Ok As Delegate or not", HFILL }}, { &hf_krb_KDC_REQ_BODY, { "KDC_REQ_BODY", "kerberos.kdc_req_body", FT_NONE, BASE_NONE, NULL, 0, "Kerberos KDC REQuest BODY", HFILL }}, { &hf_krb_PRIV_BODY, { "PRIV_BODY", "kerberos.priv_body", FT_NONE, BASE_NONE, NULL, 0, "Kerberos PRIVate BODY", HFILL }}, { &hf_krb_encrypted_PRIV, { "Encrypted PRIV", "kerberos.enc_priv", FT_NONE, BASE_NONE, NULL, 0, "Kerberos Encrypted PRIVate blob data", HFILL }}, { &hf_krb_KDCOptions_forwardable, { "Forwardable", "kerberos.kdcoptions.forwardable", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_forwardable), 0x40000000, "Flag controlling whether the tickes are forwardable or not", HFILL }}, { &hf_krb_KDCOptions_forwarded, { "Forwarded", "kerberos.kdcoptions.forwarded", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_forwarded), 0x20000000, "Has this ticket been forwarded?", HFILL }}, { &hf_krb_KDCOptions_proxyable, { "Proxyable", "kerberos.kdcoptions.proxyable", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_proxyable), 0x10000000, "Flag controlling whether the tickes are proxyable or not", HFILL }}, { &hf_krb_KDCOptions_proxy, { "Proxy", "kerberos.kdcoptions.proxy", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_proxy), 0x08000000, "Has this ticket been proxied?", HFILL }}, { &hf_krb_KDCOptions_allow_postdate, { "Allow Postdate", "kerberos.kdcoptions.allow_postdate", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_allow_postdate), 0x04000000, "Flag controlling whether we allow postdated tickets or not", HFILL }}, { &hf_krb_KDCOptions_postdated, { "Postdated", "kerberos.kdcoptions.postdated", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_postdated), 0x02000000, "Whether this ticket is postdated or not", HFILL }}, { &hf_krb_KDCOptions_renewable, { "Renewable", "kerberos.kdcoptions.renewable", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_renewable), 0x00800000, "Whether this ticket is renewable or not", HFILL }}, { &hf_krb_KDCOptions_canonicalize, { "Canonicalize", "kerberos.kdcoptions.canonicalize", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_canonicalize), 0x00010000, "Do we want the KDC to canonicalize the principal or not", HFILL }}, { &hf_krb_KDCOptions_opt_hardware_auth, { "Opt HW Auth", "kerberos.kdcoptions.opt_hardware_auth", FT_BOOLEAN, 32, NULL, 0x00100000, "Opt HW Auth flag", HFILL }}, { &hf_krb_KDCOptions_disable_transited_check, { "Disable Transited Check", "kerberos.kdcoptions.disable_transited_check", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_disable_transited_check), 0x00000020, "Whether we should do transited checking or not", HFILL }}, { &hf_krb_KDCOptions_renewable_ok, { "Renewable OK", "kerberos.kdcoptions.renewable_ok", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_renewable_ok), 0x00000010, "Whether we accept renewed tickets or not", HFILL }}, { &hf_krb_KDCOptions_enc_tkt_in_skey, { "Enc-Tkt-in-Skey", "kerberos.kdcoptions.enc_tkt_in_skey", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_enc_tkt_in_skey), 0x00000008, "Whether the ticket is encrypted in the skey or not", HFILL }}, { &hf_krb_KDCOptions_renew, { "Renew", "kerberos.kdcoptions.renew", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_renew), 0x00000002, "Is this a request to renew a ticket?", HFILL }}, { &hf_krb_KDCOptions_validate, { "Validate", "kerberos.kdcoptions.validate", FT_BOOLEAN, 32, TFS(&krb5_kdcoptions_validate), 0x00000001, "Is this a request to validate a postdated ticket?", HFILL }}, { &hf_krb_pvno, { "Pvno", "kerberos.pvno", FT_UINT32, BASE_DEC, NULL, 0, "Kerberos Protocol Version Number", HFILL }}, { &hf_krb_kvno, { "Kvno", "kerberos.kvno", FT_UINT32, BASE_DEC, NULL, 0, "Version Number for the encryption Key", HFILL }}, { &hf_krb_checksum_type, { "Type", "kerberos.checksum.type", FT_UINT32, BASE_DEC, VALS(krb5_checksum_types), 0, "Type of checksum", HFILL }}, { &hf_krb_authenticator_vno, { "Authenticator vno", "kerberos.authenticator_vno", FT_UINT32, BASE_DEC, NULL, 0, "Version Number for the Authenticator", HFILL }}, { &hf_krb_encrypted_authenticator_data, { "Authenticator data", "kerberos.authenticator.data", FT_BYTES, BASE_HEX, NULL, 0, "Data content of an encrypted authenticator", HFILL }}, { &hf_krb_encrypted_PA_ENC_TIMESTAMP, { "enc PA_ENC_TIMESTAMP", "kerberos.PA_ENC_TIMESTAMP.encrypted", FT_BYTES, BASE_HEX, NULL, 0, "Encrypted PA-ENC-TIMESTAMP blob", HFILL }}, { &hf_krb_PAC_LOGON_INFO, { "PAC_LOGON_INFO", "kerberos.PAC_LOGON_INFO", FT_BYTES, BASE_HEX, NULL, 0, "PAC_LOGON_INFO structure", HFILL }}, { &hf_krb_PAC_CREDENTIAL_TYPE, { "PAC_CREDENTIAL_TYPE", "kerberos.PAC_CREDENTIAL_TYPE", FT_BYTES, BASE_HEX, NULL, 0, "PAC_CREDENTIAL_TYPE structure", HFILL }}, { &hf_krb_PAC_SERVER_CHECKSUM, { "PAC_SERVER_CHECKSUM", "kerberos.PAC_SERVER_CHECKSUM", FT_BYTES, BASE_HEX, NULL, 0, "PAC_SERVER_CHECKSUM structure", HFILL }}, { &hf_krb_PAC_PRIVSVR_CHECKSUM, { "PAC_PRIVSVR_CHECKSUM", "kerberos.PAC_PRIVSVR_CHECKSUM", FT_BYTES, BASE_HEX, NULL, 0, "PAC_PRIVSVR_CHECKSUM structure", HFILL }}, { &hf_krb_PAC_CLIENT_INFO_TYPE, { "PAC_CLIENT_INFO_TYPE", "kerberos.PAC_CLIENT_INFO_TYPE", FT_BYTES, BASE_HEX, NULL, 0, "PAC_CLIENT_INFO_TYPE structure", HFILL }}, { &hf_krb_checksum_checksum, { "checksum", "kerberos.checksum.checksum", FT_BYTES, BASE_HEX, NULL, 0, "Kerberos Checksum", HFILL }}, { &hf_krb_ENC_PRIV, { "enc PRIV", "kerberos.ENC_PRIV", FT_BYTES, BASE_HEX, NULL, 0, "Encrypted PRIV blob", HFILL }}, { &hf_krb_encrypted_Ticket_data, { "enc-part", "kerberos.ticket.data", FT_BYTES, BASE_HEX, NULL, 0, "The encrypted part of a ticket", HFILL }}, { &hf_krb_encrypted_AP_REP_data, { "enc-part", "kerberos.aprep.data", FT_BYTES, BASE_HEX, NULL, 0, "The encrypted part of AP-REP", HFILL }}, { &hf_krb_encrypted_KDC_REP_data, { "enc-part", "kerberos.kdcrep.data", FT_BYTES, BASE_HEX, NULL, 0, "The encrypted part of KDC-REP", HFILL }}, { &hf_krb_PA_DATA_value, { "Value", "kerberos.padata.value", FT_BYTES, BASE_HEX, NULL, 0, "Content of the PADATA blob", HFILL }}, { &hf_krb_etype_info_salt, { "Salt", "kerberos.etype_info.salt", FT_BYTES, BASE_HEX, NULL, 0, "Salt", HFILL }}, { &hf_krb_SAFE_BODY_user_data, { "User Data", "kerberos.SAFE_BODY.user_data", FT_BYTES, BASE_HEX, NULL, 0, "SAFE BODY userdata field", HFILL }}, { &hf_krb_pac_signature_signature, { "Signature", "kerberos.pac.signature.signature", FT_BYTES, BASE_HEX, NULL, 0, "A PAC signature blob", HFILL }}, { &hf_krb_PA_DATA_type, { "Type", "kerberos.padata.type", FT_UINT32, BASE_DEC, VALS(krb5_preauthentication_types), 0, "Type of preauthentication data", HFILL }}, { &hf_krb_nonce, { "Nonce", "kerberos.nonce", FT_UINT32, BASE_DEC, NULL, 0, "Kerberos Nonce random number", HFILL }}, { &hf_krb_tkt_vno, { "Tkt-vno", "kerberos.tkt_vno", FT_UINT32, BASE_DEC, NULL, 0, "Version number for the Ticket format", HFILL }}, { &hf_krb_HostAddress, { "HostAddress", "kerberos.hostaddress", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos HostAddress sequence", HFILL }}, { &hf_krb_s_address, { "S-Address", "kerberos.s_address", FT_NONE, BASE_DEC, NULL, 0, "This is the Senders address", HFILL }}, { &hf_krb_key, { "key", "kerberos.key", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos EncryptionKey sequence", HFILL }}, { &hf_krb_subkey, { "Subkey", "kerberos.subkey", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos subkey", HFILL }}, { &hf_krb_seq_number, { "Seq Number", "kerberos.seq_number", FT_UINT32, BASE_DEC, NULL, 0, "This is a Kerberos sequence number", HFILL }}, { &hf_krb_AuthorizationData, { "AuthorizationData", "kerberos.AuthorizationData", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos AuthorizationData sequence", HFILL }}, { &hf_krb_EncTicketPart, { "EncTicketPart", "kerberos.EncTicketPart", FT_NONE, BASE_DEC, NULL, 0, "This is a decrypted Kerberos EncTicketPart sequence", HFILL }}, { &hf_krb_EncAPRepPart, { "EncAPRepPart", "kerberos.EncAPRepPart", FT_NONE, BASE_DEC, NULL, 0, "This is a decrypted Kerberos EncAPRepPart sequence", HFILL }}, { &hf_krb_EncKDCRepPart, { "EncKDCRepPart", "kerberos.EncKDCRepPart", FT_NONE, BASE_DEC, NULL, 0, "This is a decrypted Kerberos EncKDCRepPart sequence", HFILL }}, { &hf_krb_LastReq, { "LastReq", "kerberos.LastReq", FT_NONE, BASE_DEC, NULL, 0, "This is a LastReq sequence", HFILL }}, { &hf_krb_Authenticator, { "Authenticator", "kerberos.Authenticator", FT_NONE, BASE_DEC, NULL, 0, "This is a decrypted Kerberos Authenticator sequence", HFILL }}, { &hf_krb_Checksum, { "Checksum", "kerberos.Checksum", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos Checksum sequence", HFILL }}, { &hf_krb_HostAddresses, { "HostAddresses", "kerberos.hostaddresses", FT_NONE, BASE_DEC, NULL, 0, "This is a list of Kerberos HostAddress sequences", HFILL }}, { &hf_krb_IF_RELEVANT, { "IF_RELEVANT", "kerberos.if_relevant", FT_NONE, BASE_DEC, NULL, 0, "This is a list of IF-RELEVANT sequences", HFILL }}, { &hf_krb_etypes, { "Encryption Types", "kerberos.etypes", FT_NONE, BASE_DEC, NULL, 0, "This is a list of Kerberos encryption types", HFILL }}, { &hf_krb_LastReqs, { "LastReqs", "kerberos.LastReqs", FT_NONE, BASE_DEC, NULL, 0, "This is a list of LastReq structures", HFILL }}, { &hf_krb_sname, { "Server Name", "kerberos.sname", FT_NONE, BASE_DEC, NULL, 0, "This is the name part server's identity", HFILL }}, { &hf_krb_cname, { "Client Name", "kerberos.cname", FT_NONE, BASE_DEC, NULL, 0, "The name part of the client principal identifier", HFILL }}, { &hf_krb_authenticator_enc, { "Authenticator", "kerberos.authenticator", FT_NONE, BASE_DEC, NULL, 0, "Encrypted authenticator blob", HFILL }}, { &hf_krb_ticket_enc, { "enc-part", "kerberos.ticket.enc_part", FT_NONE, BASE_DEC, NULL, 0, "The structure holding the encrypted part of a ticket", HFILL }}, { &hf_krb_AP_REP_enc, { "enc-part", "kerberos.aprep.enc_part", FT_NONE, BASE_DEC, NULL, 0, "The structure holding the encrypted part of AP-REP", HFILL }}, { &hf_krb_KDC_REP_enc, { "enc-part", "kerberos.kdcrep.enc_part", FT_NONE, BASE_DEC, NULL, 0, "The structure holding the encrypted part of KDC-REP", HFILL }}, { &hf_krb_e_data, { "e-data", "kerberos.e_data", FT_NONE, BASE_DEC, NULL, 0, "The e-data blob", HFILL }}, { &hf_krb_padata, { "padata", "kerberos.padata", FT_NONE, BASE_DEC, NULL, 0, "Sequence of preauthentication data", HFILL }}, { &hf_krb_ticket, { "Ticket", "kerberos.ticket", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos Ticket", HFILL }}, { &hf_krb_TransitedEncoding, { "TransitedEncoding", "kerberos.TransitedEncoding", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos TransitedEncoding sequence", HFILL }}, { &hf_krb_PA_PAC_REQUEST_flag, { "PAC Request", "kerberos.pac_request.flag", FT_UINT32, BASE_DEC, NULL, 0, "This is a MS PAC Request Flag", HFILL }}, { &hf_krb_w2k_pac_entries, { "Num Entries", "kerberos.pac.entries", FT_UINT32, BASE_DEC, NULL, 0, "Number of W2k PAC entries", HFILL }}, { &hf_krb_w2k_pac_version, { "Version", "kerberos.pac.version", FT_UINT32, BASE_DEC, NULL, 0, "Version of PAC structures", HFILL }}, { &hf_krb_w2k_pac_type, { "Type", "kerberos.pac.type", FT_UINT32, BASE_DEC, VALS(w2k_pac_types), 0, "Type of W2k PAC entry", HFILL }}, { &hf_krb_w2k_pac_size, { "Size", "kerberos.pac.size", FT_UINT32, BASE_DEC, NULL, 0, "Size of W2k PAC entry", HFILL }}, { &hf_krb_w2k_pac_offset, { "Offset", "kerberos.pac.offset", FT_UINT32, BASE_DEC, NULL, 0, "Offset to W2k PAC entry", HFILL }}, { &hf_krb_pac_clientid, { "ClientID", "kerberos.pac.clientid", FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0, "ClientID Timestamp", HFILL }}, { &hf_krb_pac_namelen, { "Name Length", "kerberos.pac.namelen", FT_UINT16, BASE_DEC, NULL, 0, "Length of client name", HFILL }}, { &hf_krb_e_checksum, { "e-checksum", "kerberos.e_checksum", FT_NONE, BASE_DEC, NULL, 0, "This is a Kerberos e-checksum", HFILL }}, }; static gint *ett[] = { &ett_krb_kerberos, &ett_krb_KDC_REP_enc, &ett_krb_sname, &ett_krb_cname, &ett_krb_AP_REP_enc, &ett_krb_padata, &ett_krb_etypes, &ett_krb_LastReqs, &ett_krb_IF_RELEVANT, &ett_krb_PA_DATA_tree, &ett_krb_s_address, &ett_krb_HostAddress, &ett_krb_HostAddresses, &ett_krb_authenticator_enc, &ett_krb_AP_Options, &ett_krb_KDC_Options, &ett_krb_Ticket_Flags, &ett_krb_request, &ett_krb_recordmark, &ett_krb_ticket, &ett_krb_ticket_enc, &ett_krb_PRIV, &ett_krb_PRIV_enc, &ett_krb_EncTicketPart, &ett_krb_EncAPRepPart, &ett_krb_EncKDCRepPart, &ett_krb_LastReq, &ett_krb_Authenticator, &ett_krb_Checksum, &ett_krb_key, &ett_krb_subkey, &ett_krb_AuthorizationData, &ett_krb_TransitedEncoding, &ett_krb_PAC, &ett_krb_PAC_LOGON_INFO, &ett_krb_PAC_CREDENTIAL_TYPE, &ett_krb_PAC_SERVER_CHECKSUM, &ett_krb_PAC_PRIVSVR_CHECKSUM, &ett_krb_PAC_CLIENT_INFO_TYPE, &ett_krb_e_checksum, }; module_t *krb_module; proto_kerberos = proto_register_protocol("Kerberos", "KRB5", "kerberos"); 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_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 */ NULL, /* Request data */ NULL /* Response data */ }; void proto_reg_handoff_kerberos(void) { dissector_handle_t kerberos_handle_tcp; kerberos_handle_udp = create_dissector_handle(dissect_kerberos_udp, proto_kerberos); kerberos_handle_tcp = create_dissector_handle(dissect_kerberos_tcp, proto_kerberos); dissector_add("udp.port", UDP_PORT_KERBEROS, kerberos_handle_udp); dissector_add("tcp.port", TCP_PORT_KERBEROS, kerberos_handle_tcp); register_dcerpc_auth_subdissector(DCE_C_AUTHN_LEVEL_PKT_PRIVACY, DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS, &gss_kerb_auth_fns); } /* MISC definitions from RFC1510: Realm ::= GeneralString KerberosTime ::= GeneralizedTime AuthorizationData ::= SEQUENCE OF SEQUENCE { ad-type[0] INTEGER, ad-data[1] OCTET STRING } APOptions ::= BIT STRING { reserved(0), use-session-key(1), mutual-required(2) } TicketFlags ::= BIT STRING { reserved(0), forwardable(1), forwarded(2), proxiable(3), proxy(4), may-postdate(5), postdated(6), invalid(7), renewable(8), initial(9), pre-authent(10), hw-authent(11) } KDCOptions ::= BIT STRING { reserved(0), forwardable(1), forwarded(2), proxiable(3), proxy(4), allow-postdate(5), postdated(6), unused7(7), renewable(8), unused9(9), unused10(10), unused11(11), renewable-ok(27), enc-tkt-in-skey(28), renew(30), validate(31) } LastReq ::= SEQUENCE OF SEQUENCE { lr-type[0] INTEGER, lr-value[1] KerberosTime } Ticket ::= [APPLICATION 1] SEQUENCE { tkt-vno[0] INTEGER, realm[1] Realm, sname[2] PrincipalName, enc-part[3] EncryptedData } -- Encrypted part of ticket EncTicketPart ::= [APPLICATION 3] SEQUENCE { flags[0] TicketFlags, key[1] EncryptionKey, crealm[2] Realm, cname[3] PrincipalName, transited[4] TransitedEncoding, authtime[5] KerberosTime, starttime[6] KerberosTime OPTIONAL, endtime[7] KerberosTime, renew-till[8] KerberosTime OPTIONAL, caddr[9] HostAddresses OPTIONAL, authorization-data[10] AuthorizationData OPTIONAL } -- encoded Transited field TransitedEncoding ::= SEQUENCE { tr-type[0] INTEGER, -- must be registered contents[1] OCTET STRING } -- Unencrypted authenticator Authenticator ::= [APPLICATION 2] SEQUENCE { authenticator-vno[0] INTEGER, crealm[1] Realm, cname[2] PrincipalName, cksum[3] Checksum OPTIONAL, cusec[4] INTEGER, ctime[5] KerberosTime, subkey[6] EncryptionKey OPTIONAL, seq-number[7] INTEGER OPTIONAL, authorization-data[8] AuthorizationData OPTIONAL } PA-DATA ::= SEQUENCE { padata-type[1] INTEGER, padata-value[2] OCTET STRING, -- might be encoded AP-REQ } padata-type ::= PA-ENC-TIMESTAMP padata-value ::= EncryptedData -- PA-ENC-TS-ENC PA-ENC-TS-ENC ::= SEQUENCE { patimestamp[0] KerberosTime, -- client's time pausec[1] INTEGER OPTIONAL } EncASRepPart ::= [APPLICATION 25[25]] EncKDCRepPart EncTGSRepPart ::= [APPLICATION 26] EncKDCRepPart EncKDCRepPart ::= SEQUENCE { key[0] EncryptionKey, last-req[1] LastReq, nonce[2] INTEGER, key-expiration[3] KerberosTime OPTIONAL, flags[4] TicketFlags, authtime[5] KerberosTime, starttime[6] KerberosTime OPTIONAL, endtime[7] KerberosTime, renew-till[8] KerberosTime OPTIONAL, srealm[9] Realm, sname[10] PrincipalName, caddr[11] HostAddresses OPTIONAL } APOptions ::= BIT STRING { reserved(0), use-session-key(1), mutual-required(2) } EncAPRepPart ::= [APPLICATION 27] SEQUENCE { ctime[0] KerberosTime, cusec[1] INTEGER, subkey[2] EncryptionKey OPTIONAL, seq-number[3] INTEGER OPTIONAL } KRB-SAFE ::= [APPLICATION 20] SEQUENCE { pvno[0] INTEGER, msg-type[1] INTEGER, safe-body[2] KRB-SAFE-BODY, cksum[3] Checksum } KRB-SAFE-BODY ::= SEQUENCE { user-data[0] OCTET STRING, timestamp[1] KerberosTime OPTIONAL, usec[2] INTEGER OPTIONAL, seq-number[3] INTEGER OPTIONAL, s-address[4] HostAddress, r-address[5] HostAddress OPTIONAL } KRB-PRIV ::= [APPLICATION 21] SEQUENCE { pvno[0] INTEGER, msg-type[1] INTEGER, enc-part[3] EncryptedData } EncKrbPrivPart ::= [APPLICATION 28] SEQUENCE { user-data[0] OCTET STRING, timestamp[1] KerberosTime OPTIONAL, usec[2] INTEGER OPTIONAL, seq-number[3] INTEGER OPTIONAL, s-address[4] HostAddress, -- sender's addr r-address[5] HostAddress OPTIONAL -- recip's addr } KRB-CRED ::= [APPLICATION 22] SEQUENCE { pvno[0] INTEGER, msg-type[1] INTEGER, -- KRB_CRED tickets[2] SEQUENCE OF Ticket, enc-part[3] EncryptedData } EncKrbCredPart ::= [APPLICATION 29] SEQUENCE { ticket-info[0] SEQUENCE OF KrbCredInfo, nonce[1] INTEGER OPTIONAL, timestamp[2] KerberosTime OPTIONAL, usec[3] INTEGER OPTIONAL, s-address[4] HostAddress OPTIONAL, r-address[5] HostAddress OPTIONAL } KrbCredInfo ::= SEQUENCE { key[0] EncryptionKey, prealm[1] Realm OPTIONAL, pname[2] PrincipalName OPTIONAL, flags[3] TicketFlags OPTIONAL, authtime[4] KerberosTime OPTIONAL, starttime[5] KerberosTime OPTIONAL, endtime[6] KerberosTime OPTIONAL renew-till[7] KerberosTime OPTIONAL, srealm[8] Realm OPTIONAL, sname[9] PrincipalName OPTIONAL, caddr[10] HostAddresses OPTIONAL } METHOD-DATA ::= SEQUENCE of PA-DATA If the error-code is KRB_AP_ERR_METHOD, then the e-data field will contain an encoding of the following sequence: METHOD-DATA ::= SEQUENCE { method-type[0] INTEGER, method-data[1] OCTET STRING OPTIONAL } EncryptionKey ::= SEQUENCE { keytype[0] INTEGER, keyvalue[1] OCTET STRING } Checksum ::= SEQUENCE { cksumtype[0] INTEGER, checksum[1] OCTET STRING } */