/* packet-kerberos.c * Routines for Kerberos * Wes Hardaker (c) 2000 * wjhardaker@ucdavis.edu * Richard Sharpe (C) 2002, rsharpe@samba.org, modularized a bit more and * added AP-REQ and AP-REP dissection * * Ronnie Sahlberg (C) 2004, major rewrite for new ASN.1/BER API. * decryption of kerberos blobs if keytab is provided * * See RFC 1510, and various I-Ds and other documents showing additions, * e.g. ones listed under * * http://www.isi.edu/people/bcn/krb-revisions/ * * and * * http://www.ietf.org/internet-drafts/draft-ietf-krb-wg-kerberos-clarifications-07.txt * * and * * http://www.ietf.org/internet-drafts/draft-ietf-krb-wg-kerberos-referrals-05.txt * * Some structures from RFC2630 * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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. */ #include "config.h" #include #include #include #ifdef HAVE_LIBNETTLE #define HAVE_KERBEROS #ifdef _WIN32 #include #include #else #include #include #endif #include #include /* For keyfile manipulation */ #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define UDP_PORT_KERBEROS 88 #define TCP_PORT_KERBEROS 88 #define ADDRESS_STR_BUFSIZ 256 typedef struct kerberos_key { guint32 keytype; int keylength; const guint8 *keyvalue; } kerberos_key_t; static dissector_handle_t kerberos_handle_udp; /* Forward declarations */ static int dissect_kerberos_Applications(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); static int dissect_kerberos_PA_ENC_TIMESTAMP(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); static int dissect_kerberos_KERB_PA_PAC_REQUEST(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); static int dissect_kerberos_PA_S4U2Self(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); static int dissect_kerberos_ETYPE_INFO(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); static int dissect_kerberos_ETYPE_INFO2(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); static int dissect_kerberos_AD_IF_RELEVANT(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_); /* Desegment Kerberos over TCP messages */ static gboolean krb_desegment = TRUE; static gint proto_kerberos = -1; static struct { const char *set; const char *unset; } bitval = { "Set", "Not set" }; static gint hf_krb_rm_reserved = -1; static gint hf_krb_rm_reclen = -1; static gint hf_krb_provsrv_location = -1; static gint hf_krb_smb_nt_status = -1; static gint hf_krb_smb_unknown = -1; static gint hf_krb_address_ip = -1; static gint hf_krb_address_netbios = -1; static gint hf_krb_address_ipv6 = -1; static gint hf_krb_gssapi_len = -1; static gint hf_krb_gssapi_bnd = -1; static gint hf_krb_gssapi_dlgopt = -1; static gint hf_krb_gssapi_dlglen = -1; static gint hf_krb_gssapi_c_flag_deleg = -1; static gint hf_krb_gssapi_c_flag_mutual = -1; static gint hf_krb_gssapi_c_flag_replay = -1; static gint hf_krb_gssapi_c_flag_sequence = -1; static gint hf_krb_gssapi_c_flag_conf = -1; static gint hf_krb_gssapi_c_flag_integ = -1; static gint hf_krb_gssapi_c_flag_dce_style = -1; #include "packet-kerberos-hf.c" /* Initialize the subtree pointers */ static gint ett_kerberos = -1; static gint ett_krb_recordmark = -1; #include "packet-kerberos-ett.c" static expert_field ei_kerberos_decrypted_keytype = EI_INIT; static dissector_handle_t krb4_handle=NULL; /* Global variables */ static guint32 krb5_errorcode; static guint32 gbl_keytype; static gboolean gbl_do_col_info; static void call_kerberos_callbacks(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int tag, kerberos_callbacks *cb) { if(!cb){ return; } while(cb->tag){ if(cb->tag==tag){ cb->callback(pinfo, tvb, tree); return; } cb++; } return; } #ifdef HAVE_KERBEROS /* Decrypt Kerberos blobs */ gboolean krb_decrypt = FALSE; /* keytab filename */ static const char *keytab_filename = ""; WS_DLL_PUBLIC void read_keytab_file(const char *); void read_keytab_file_from_preferences(void) { static char *last_keytab = NULL; if (!krb_decrypt) { return; } if (keytab_filename == NULL) { return; } if (last_keytab && !strcmp(last_keytab, keytab_filename)) { return; } if (last_keytab != NULL) { g_free(last_keytab); last_keytab = NULL; } last_keytab = g_strdup(keytab_filename); read_keytab_file(last_keytab); } #elif defined(_WIN32) /* * Dummy version to allow us to export this function -- even * on systems without KERBEROS. */ void read_keytab_file_from_preferences(void) { } #endif #if defined(HAVE_HEIMDAL_KERBEROS) || defined(HAVE_MIT_KERBEROS) #ifdef _WIN32 /* prevent redefinition warnings in kfw-2.5\inc\win_mac.h */ #undef HAVE_STDARG_H #undef HAVE_SYS_TYPES_H #endif #include enc_key_t *enc_key_list=NULL; static void add_encryption_key(packet_info *pinfo, int keytype, int keylength, const char *keyvalue, const char *origin) { enc_key_t *new_key; if(pinfo->fd->flags.visited){ return; } printf("added key in %u keytype:%d len:%d\n",pinfo->fd->num, keytype, keylength); new_key=(enc_key_t *)g_malloc(sizeof(enc_key_t)); g_snprintf(new_key->key_origin, KRB_MAX_ORIG_LEN, "%s learnt from frame %u",origin,pinfo->fd->num); new_key->next=enc_key_list; enc_key_list=new_key; new_key->keytype=keytype; new_key->keylength=keylength; /*XXX this needs to be freed later */ new_key->keyvalue=(char *)g_memdup(keyvalue, keylength); } #endif /* HAVE_HEIMDAL_KERBEROS || HAVE_MIT_KERBEROS */ #if defined(_WIN32) && !defined(HAVE_HEIMDAL_KERBEROS) && !defined(HAVE_MIT_KERBEROS) && !defined(HAVE_LIBNETTLE) void read_keytab_file(const char *filename _U_) { } #endif #ifdef HAVE_MIT_KERBEROS static krb5_context krb5_ctx; void read_keytab_file(const char *filename) { krb5_keytab keytab; krb5_error_code ret; krb5_keytab_entry key; krb5_kt_cursor cursor; enc_key_t *new_key; static gboolean first_time=TRUE; printf("read keytab file %s\n", filename); if(first_time){ first_time=FALSE; ret = krb5_init_context(&krb5_ctx); if(ret && ret != KRB5_CONFIG_CANTOPEN){ return; } } /* should use a file in the wireshark users dir */ ret = krb5_kt_resolve(krb5_ctx, filename, &keytab); if(ret){ fprintf(stderr, "KERBEROS ERROR: Badly formatted keytab filename :%s\n",filename); return; } ret = krb5_kt_start_seq_get(krb5_ctx, keytab, &cursor); if(ret){ fprintf(stderr, "KERBEROS ERROR: Could not open or could not read from keytab file :%s\n",filename); return; } do{ new_key=(enc_key_t *)g_malloc(sizeof(enc_key_t)); new_key->next=enc_key_list; ret = krb5_kt_next_entry(krb5_ctx, keytab, &key, &cursor); if(ret==0){ int i; char *pos; /* generate origin string, describing where this key came from */ pos=new_key->key_origin; pos+=MIN(KRB_MAX_ORIG_LEN, g_snprintf(pos, KRB_MAX_ORIG_LEN, "keytab principal ")); for(i=0;ilength;i++){ pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "%s%s",(i?"/":""),(key.principal->data[i]).data)); } pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "@%s",key.principal->realm.data)); *pos=0; /*printf("added key for principal :%s\n", new_key->key_origin);*/ new_key->keytype=key.key.enctype; new_key->keylength=key.key.length; new_key->keyvalue=(char *)g_memdup(key.key.contents, key.key.length); enc_key_list=new_key; } }while(ret==0); ret = krb5_kt_end_seq_get(krb5_ctx, keytab, &cursor); if(ret){ krb5_kt_close(krb5_ctx, keytab); } } guint8 * decrypt_krb5_data(proto_tree *tree, packet_info *pinfo, int usage, tvbuff_t *cryptotvb, int keytype, int *datalen) { krb5_error_code ret; enc_key_t *ek; krb5_data data = {0,0,NULL}; krb5_keytab_entry key; int length = tvb_length(cryptotvb); const guint8 *cryptotext = tvb_get_ptr(cryptotvb, 0, length); /* don't do anything if we are not attempting to decrypt data */ if(!krb_decrypt || length < 1){ return NULL; } /* make sure we have all the data we need */ if (tvb_length(cryptotvb) < tvb_reported_length(cryptotvb)) { return NULL; } read_keytab_file_from_preferences(); data.data = (char *)g_malloc(length); data.length = length; for(ek=enc_key_list;ek;ek=ek->next){ krb5_enc_data input; /* shortcircuit and bail out if enctypes are not matching */ if((keytype != -1) && (ek->keytype != keytype)) { continue; } input.enctype = ek->keytype; input.ciphertext.length = length; input.ciphertext.data = (guint8 *)cryptotext; key.key.enctype=ek->keytype; key.key.length=ek->keylength; key.key.contents=ek->keyvalue; ret = krb5_c_decrypt(krb5_ctx, &(key.key), usage, 0, &input, &data); if(ret == 0){ char *user_data; expert_add_info_format(pinfo, NULL, &ei_kerberos_decrypted_keytype, "Decrypted keytype %d in frame %u using %s", ek->keytype, pinfo->fd->num, ek->key_origin); proto_tree_add_text(tree, NULL, 0, 0, "[Decrypted using: %s]", ek->key_origin); /* return a private g_malloced blob to the caller */ user_data=data.data; if (datalen) { *datalen = data.length; } return user_data; } } g_free(data.data); return NULL; } #elif defined(HAVE_HEIMDAL_KERBEROS) static krb5_context krb5_ctx; void read_keytab_file(const char *filename) { krb5_keytab keytab; krb5_error_code ret; krb5_keytab_entry key; krb5_kt_cursor cursor; enc_key_t *new_key; static gboolean first_time=TRUE; if(first_time){ first_time=FALSE; ret = krb5_init_context(&krb5_ctx); if(ret){ return; } } /* should use a file in the wireshark users dir */ ret = krb5_kt_resolve(krb5_ctx, filename, &keytab); if(ret){ fprintf(stderr, "KERBEROS ERROR: Could not open keytab file :%s\n",filename); return; } ret = krb5_kt_start_seq_get(krb5_ctx, keytab, &cursor); if(ret){ fprintf(stderr, "KERBEROS ERROR: Could not read from keytab file :%s\n",filename); return; } do{ new_key=g_malloc(sizeof(enc_key_t)); new_key->next=enc_key_list; ret = krb5_kt_next_entry(krb5_ctx, keytab, &key, &cursor); if(ret==0){ unsigned int i; char *pos; /* generate origin string, describing where this key came from */ pos=new_key->key_origin; pos+=MIN(KRB_MAX_ORIG_LEN, g_snprintf(pos, KRB_MAX_ORIG_LEN, "keytab principal ")); for(i=0;iname.name_string.len;i++){ pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "%s%s",(i?"/":""),key.principal->name.name_string.val[i])); } pos+=MIN(KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), g_snprintf(pos, KRB_MAX_ORIG_LEN-(pos-new_key->key_origin), "@%s",key.principal->realm)); *pos=0; new_key->keytype=key.keyblock.keytype; new_key->keylength=key.keyblock.keyvalue.length; new_key->keyvalue=g_memdup(key.keyblock.keyvalue.data, key.keyblock.keyvalue.length); enc_key_list=new_key; } }while(ret==0); ret = krb5_kt_end_seq_get(krb5_ctx, keytab, &cursor); if(ret){ krb5_kt_close(krb5_ctx, keytab); } } guint8 * decrypt_krb5_data(proto_tree *tree, packet_info *pinfo, int usage, tvbuff_t *cryptotvb, int keytype, int *datalen) { krb5_error_code ret; krb5_data data; enc_key_t *ek; int length = tvb_length(cryptotvb); const guint8 *cryptotext = tvb_get_ptr(cryptotvb, 0, length); /* don't do anything if we are not attempting to decrypt data */ if(!krb_decrypt){ return NULL; } /* make sure we have all the data we need */ if (tvb_length(cryptotvb) < tvb_reported_length(cryptotvb)) { return NULL; } read_keytab_file_from_preferences(); for(ek=enc_key_list;ek;ek=ek->next){ krb5_keytab_entry key; krb5_crypto crypto; guint8 *cryptocopy; /* workaround for pre-0.6.1 heimdal bug */ /* shortcircuit and bail out if enctypes are not matching */ if((keytype != -1) && (ek->keytype != keytype)) { continue; } key.keyblock.keytype=ek->keytype; key.keyblock.keyvalue.length=ek->keylength; key.keyblock.keyvalue.data=ek->keyvalue; ret = krb5_crypto_init(krb5_ctx, &(key.keyblock), 0, &crypto); if(ret){ return NULL; } /* pre-0.6.1 versions of Heimdal would sometimes change the cryptotext data even when the decryption failed. This would obviously not work since we iterate over the keys. So just give it a copy of the crypto data instead. This has been seen for RC4-HMAC blobs. */ cryptocopy=g_memdup(cryptotext, length); ret = krb5_decrypt_ivec(krb5_ctx, crypto, usage, cryptocopy, length, &data, NULL); g_free(cryptocopy); if((ret == 0) && (length>0)){ char *user_data; printf("woohoo decrypted keytype:%d in frame:%u\n", ek->keytype, pinfo->fd->num); proto_tree_add_text(tree, NULL, 0, 0, "[Decrypted using: %s]", ek->key_origin); krb5_crypto_destroy(krb5_ctx, crypto); /* return a private g_malloced blob to the caller */ user_data=g_memdup(data.data, data.length); if (datalen) { *datalen = data.length; } return user_data; } krb5_crypto_destroy(krb5_ctx, crypto); } return NULL; } #elif defined (HAVE_LIBNETTLE) #define SERVICE_KEY_SIZE (DES3_KEY_SIZE + 2) #define KEYTYPE_DES3_CBC_MD5 5 /* Currently the only one supported */ typedef struct _service_key_t { guint16 kvno; int keytype; int length; guint8 *contents; char origin[KRB_MAX_ORIG_LEN+1]; } service_key_t; GSList *service_key_list = NULL; static void add_encryption_key(packet_info *pinfo, int keytype, int keylength, const char *keyvalue, const char *origin) { service_key_t *new_key; if(pinfo->fd->flags.visited){ return; } printf("added key in %u\n",pinfo->fd->num); new_key = g_malloc(sizeof(service_key_t)); new_key->kvno = 0; new_key->keytype = keytype; new_key->length = keylength; new_key->contents = g_memdup(keyvalue, keylength); g_snprintf(new_key->origin, KRB_MAX_ORIG_LEN, "%s learnt from frame %u", origin, pinfo->fd->num); service_key_list = g_slist_append(service_key_list, (gpointer) new_key); } static void clear_keytab(void) { GSList *ske; service_key_t *sk; for(ske = service_key_list; ske != NULL; ske = g_slist_next(ske)){ sk = (service_key_t *) ske->data; if (sk) { g_free(sk->contents); g_free(sk); } } g_slist_free(service_key_list); service_key_list = NULL; } static void read_keytab_file(const char *service_key_file) { FILE *skf; ws_statb64 st; service_key_t *sk; unsigned char buf[SERVICE_KEY_SIZE]; int newline_skip = 0, count = 0; if (service_key_file != NULL && ws_stat64 (service_key_file, &st) == 0) { /* The service key file contains raw 192-bit (24 byte) 3DES keys. * There can be zero, one (\n), or two (\r\n) characters between * keys. Trailing characters are ignored. */ /* XXX We should support the standard keytab format instead */ if (st.st_size > SERVICE_KEY_SIZE) { if ( (st.st_size % (SERVICE_KEY_SIZE + 1) == 0) || (st.st_size % (SERVICE_KEY_SIZE + 1) == SERVICE_KEY_SIZE) ) { newline_skip = 1; } else if ( (st.st_size % (SERVICE_KEY_SIZE + 2) == 0) || (st.st_size % (SERVICE_KEY_SIZE + 2) == SERVICE_KEY_SIZE) ) { newline_skip = 2; } } skf = ws_fopen(service_key_file, "rb"); if (! skf) return; while (fread(buf, SERVICE_KEY_SIZE, 1, skf) == 1) { sk = g_malloc(sizeof(service_key_t)); sk->kvno = buf[0] << 8 | buf[1]; sk->keytype = KEYTYPE_DES3_CBC_MD5; sk->length = DES3_KEY_SIZE; sk->contents = g_memdup(buf + 2, DES3_KEY_SIZE); g_snprintf(sk->origin, KRB_MAX_ORIG_LEN, "3DES service key file, key #%d, offset %ld", count, ftell(skf)); service_key_list = g_slist_append(service_key_list, (gpointer) sk); fseek(skf, newline_skip, SEEK_CUR); count++; g_warning("added key: %s", sk->origin); } fclose(skf); } } #define CONFOUNDER_PLUS_CHECKSUM 24 guint8 * decrypt_krb5_data(proto_tree *tree, packet_info *pinfo, int _U_ usage, tvbuff_t *cryptotvb, int keytype, int *datalen) { tvbuff_t *encr_tvb; guint8 *decrypted_data = NULL, *plaintext = NULL; 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; int length = tvb_length(cryptotvb); const guint8 *cryptotext = tvb_get_ptr(cryptotvb, 0, length); /* don't do anything if we are not attempting to decrypt data */ if(!krb_decrypt){ return NULL; } /* make sure we have all the data we need */ if (tvb_length(cryptotvb) < tvb_reported_length(cryptotvb)) { return NULL; } if (keytype != KEYTYPE_DES3_CBC_MD5 || service_key_list == NULL) { return NULL; } decrypted_data = g_malloc(length); for(ske = service_key_list; ske != NULL; ske = g_slist_next(ske)){ gboolean do_continue = FALSE; sk = (service_key_t *) ske->data; des_fix_parity(DES3_KEY_SIZE, key, sk->contents); md5_init(&md5s); memset(initial_vector, 0, DES_BLOCK_SIZE); 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_BOUNDS_ERRORS { tvb_free(encr_tvb); do_continue = TRUE; } ENDTRY; if (do_continue) continue; data_len = item_len + offset - CONFOUNDER_PLUS_CHECKSUM; if ((int) item_len + offset > length) { tvb_free(encr_tvb); continue; } md5_append(&md5s, confounder, 8); md5_append(&md5s, zero_fill, 16); md5_append(&md5s, decrypted_data + CONFOUNDER_PLUS_CHECKSUM, data_len); md5_finish(&md5s, digest); if (tvb_memeql (encr_tvb, 8, digest, 16) == 0) { g_warning("woohoo decrypted keytype:%d in frame:%u\n", keytype, pinfo->fd->num); plaintext = g_malloc(data_len); tvb_memcpy(encr_tvb, plaintext, CONFOUNDER_PLUS_CHECKSUM, data_len); tvb_free(encr_tvb); if (datalen) { *datalen = data_len; } g_free(decrypted_data); return(plaintext); } tvb_free(encr_tvb); } g_free(decrypted_data); return NULL; } #endif /* HAVE_MIT_KERBEROS / HAVE_HEIMDAL_KERBEROS / HAVE_LIBNETTLE */ #define INET6_ADDRLEN 16 /* TCP Record Mark */ #define KRB_RM_RESERVED 0x80000000U #define KRB_RM_RECLEN 0x7fffffffU #define KRB5_MSG_TICKET 1 /* Ticket */ #define KRB5_MSG_AUTHENTICATOR 2 /* Authenticator */ #define KRB5_MSG_ENC_TICKET_PART 3 /* EncTicketPart */ #define KRB5_MSG_AS_REQ 10 /* AS-REQ type */ #define KRB5_MSG_AS_REP 11 /* AS-REP type */ #define KRB5_MSG_TGS_REQ 12 /* TGS-REQ type */ #define KRB5_MSG_TGS_REP 13 /* TGS-REP type */ #define KRB5_MSG_AP_REQ 14 /* AP-REQ type */ #define KRB5_MSG_AP_REP 15 /* AP-REP type */ #define KRB5_MSG_SAFE 20 /* KRB-SAFE type */ #define KRB5_MSG_PRIV 21 /* KRB-PRIV type */ #define KRB5_MSG_CRED 22 /* KRB-CRED type */ #define KRB5_MSG_ENC_AS_REP_PART 25 /* EncASRepPart */ #define KRB5_MSG_ENC_TGS_REP_PART 26 /* EncTGSRepPart */ #define KRB5_MSG_ENC_AP_REP_PART 27 /* EncAPRepPart */ #define KRB5_MSG_ENC_KRB_PRIV_PART 28 /* EncKrbPrivPart */ #define KRB5_MSG_ENC_KRB_CRED_PART 29 /* EncKrbCredPart */ #define KRB5_MSG_ERROR 30 /* KRB-ERROR type */ /* address type constants */ #define KRB5_ADDR_IPv4 0x02 #define KRB5_ADDR_CHAOS 0x05 #define KRB5_ADDR_XEROX 0x06 #define KRB5_ADDR_ISO 0x07 #define KRB5_ADDR_DECNET 0x0c #define KRB5_ADDR_APPLETALK 0x10 #define KRB5_ADDR_NETBIOS 0x14 #define KRB5_ADDR_IPv6 0x18 /* encryption type constants */ #define KRB5_ENCTYPE_NULL 0 #define KRB5_ENCTYPE_DES_CBC_CRC 1 #define KRB5_ENCTYPE_DES_CBC_MD4 2 #define KRB5_ENCTYPE_DES_CBC_MD5 3 #define KRB5_ENCTYPE_DES_CBC_RAW 4 #define KRB5_ENCTYPE_DES3_CBC_SHA 5 #define KRB5_ENCTYPE_DES3_CBC_RAW 6 #define KRB5_ENCTYPE_DES_HMAC_SHA1 8 #define KRB5_ENCTYPE_DSA_SHA1_CMS 9 #define KRB5_ENCTYPE_RSA_MD5_CMS 10 #define KRB5_ENCTYPE_RSA_SHA1_CMS 11 #define KRB5_ENCTYPE_RC2_CBC_ENV 12 #define KRB5_ENCTYPE_RSA_ENV 13 #define KRB5_ENCTYPE_RSA_ES_OEAP_ENV 14 #define KRB5_ENCTYPE_DES_EDE3_CBC_ENV 15 #define KRB5_ENCTYPE_DES3_CBC_SHA1 16 #define KRB5_ENCTYPE_AES128_CTS_HMAC_SHA1_96 17 #define KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96 18 #define KRB5_ENCTYPE_DES_CBC_MD5_NT 20 #define KERB_ENCTYPE_RC4_HMAC 23 #define KERB_ENCTYPE_RC4_HMAC_EXP 24 #define KRB5_ENCTYPE_UNKNOWN 0x1ff #define KRB5_ENCTYPE_LOCAL_DES3_HMAC_SHA1 0x7007 #define KRB5_ENCTYPE_RC4_PLAIN_EXP 0xffffff73 #define KRB5_ENCTYPE_RC4_PLAIN 0xffffff74 #define KRB5_ENCTYPE_RC4_PLAIN_OLD_EXP 0xffffff78 #define KRB5_ENCTYPE_RC4_HMAC_OLD_EXP 0xffffff79 #define KRB5_ENCTYPE_RC4_PLAIN_OLD 0xffffff7a #define KRB5_ENCTYPE_RC4_HMAC_OLD 0xffffff7b #define KRB5_ENCTYPE_DES_PLAIN 0xffffff7c #define KRB5_ENCTYPE_RC4_SHA 0xffffff7d #define KRB5_ENCTYPE_RC4_LM 0xffffff7e #define KRB5_ENCTYPE_RC4_PLAIN2 0xffffff7f #define KRB5_ENCTYPE_RC4_MD4 0xffffff80 /* checksum types */ #define KRB5_CHKSUM_NONE 0 #define KRB5_CHKSUM_CRC32 1 #define KRB5_CHKSUM_MD4 2 #define KRB5_CHKSUM_KRB_DES_MAC 4 #define KRB5_CHKSUM_KRB_DES_MAC_K 5 #define KRB5_CHKSUM_MD5 7 #define KRB5_CHKSUM_MD5_DES 8 /* the following four come from packetcable */ #define KRB5_CHKSUM_MD5_DES3 9 #define KRB5_CHKSUM_HMAC_SHA1_DES3_KD 12 #define KRB5_CHKSUM_HMAC_SHA1_DES3 13 #define KRB5_CHKSUM_SHA1_UNKEYED 14 #define KRB5_CHKSUM_HMAC_MD5 0xffffff76 #define KRB5_CHKSUM_MD5_HMAC 0xffffff77 #define KRB5_CHKSUM_RC4_MD5 0xffffff78 #define KRB5_CHKSUM_MD25 0xffffff79 #define KRB5_CHKSUM_DES_MAC_MD5 0xffffff7a #define KRB5_CHKSUM_DES_MAC 0xffffff7b #define KRB5_CHKSUM_REAL_CRC32 0xffffff7c #define KRB5_CHKSUM_SHA1 0xffffff7d #define KRB5_CHKSUM_LM 0xffffff7e #define KRB5_CHKSUM_GSSAPI 0x8003 /* * For KERB_ENCTYPE_RC4_HMAC and KERB_ENCTYPE_RC4_HMAC_EXP, see * * http://www.ietf.org/internet-drafts/draft-brezak-win2k-krb-rc4-hmac-04.txt * * unless it's expired. */ /* pre-authentication type constants */ #define KRB5_PA_TGS_REQ 1 #define KRB5_PA_ENC_TIMESTAMP 2 #define KRB5_PA_PW_SALT 3 #define KRB5_PA_ENC_ENCKEY 4 #define KRB5_PA_ENC_UNIX_TIME 5 #define KRB5_PA_ENC_SANDIA_SECURID 6 #define KRB5_PA_SESAME 7 #define KRB5_PA_OSF_DCE 8 #define KRB5_PA_CYBERSAFE_SECUREID 9 #define KRB5_PA_AFS3_SALT 10 #define KRB5_PA_ENCTYPE_INFO 11 #define KRB5_PA_SAM_CHALLENGE 12 #define KRB5_PA_SAM_RESPONSE 13 #define KRB5_PA_PK_AS_REQ 14 #define KRB5_PA_PK_AS_REP 15 #define KRB5_PA_DASS 16 #define KRB5_PA_ENCTYPE_INFO2 19 #define KRB5_PA_USE_SPECIFIED_KVNO 20 #define KRB5_PA_SAM_REDIRECT 21 #define KRB5_PA_GET_FROM_TYPED_DATA 22 #define KRB5_PA_SAM_ETYPE_INFO 23 #define KRB5_PA_ALT_PRINC 24 #define KRB5_PA_SAM_CHALLENGE2 30 #define KRB5_PA_SAM_RESPONSE2 31 #define KRB5_TD_PKINIT_CMS_CERTIFICATES 101 #define KRB5_TD_KRB_PRINCIPAL 102 #define KRB5_TD_KRB_REALM 103 #define KRB5_TD_TRUSTED_CERTIFIERS 104 #define KRB5_TD_CERTIFICATE_INDEX 105 #define KRB5_TD_APP_DEFINED_ERROR 106 #define KRB5_TD_REQ_NONCE 107 #define KRB5_TD_REQ_SEQ 108 /* preauthentication types >127 (i.e. negative ones) are app specific. however since Microsoft is the dominant(only?) user of types in this range we also treat the type as unsigned. */ #define KRB5_PA_PAC_REQUEST 128 /* (Microsoft extension) */ #define KRB5_PA_FOR_USER 129 /* Impersonation (Microsoft extension) See [MS-SFU]. XXX - replaced by KRB5_PA_S4U2SELF */ #define KRB5_PA_S4U2SELF 129 #define KRB5_PA_PROV_SRV_LOCATION 0xffffffff /* (gint32)0xFF) packetcable stuff */ /* Principal name-type */ #define KRB5_NT_UNKNOWN 0 #define KRB5_NT_PRINCIPAL 1 #define KRB5_NT_SRV_INST 2 #define KRB5_NT_SRV_HST 3 #define KRB5_NT_SRV_XHST 4 #define KRB5_NT_UID 5 #define KRB5_NT_X500_PRINCIPAL 6 #define KRB5_NT_SMTP_NAME 7 #define KRB5_NT_ENTERPRISE 10 /* * MS specific name types, from * * http://msdn.microsoft.com/library/en-us/security/security/kerb_external_name.asp */ #define KRB5_NT_MS_PRINCIPAL -128 #define KRB5_NT_MS_PRINCIPAL_AND_SID -129 #define KRB5_NT_ENT_PRINCIPAL_AND_SID -130 #define KRB5_NT_PRINCIPAL_AND_SID -131 #define KRB5_NT_SRV_INST_AND_SID -132 /* error table constants */ /* I prefixed the krb5_err.et constant names with KRB5_ET_ for these */ #define KRB5_ET_KRB5KDC_ERR_NONE 0 #define KRB5_ET_KRB5KDC_ERR_NAME_EXP 1 #define KRB5_ET_KRB5KDC_ERR_SERVICE_EXP 2 #define KRB5_ET_KRB5KDC_ERR_BAD_PVNO 3 #define KRB5_ET_KRB5KDC_ERR_C_OLD_MAST_KVNO 4 #define KRB5_ET_KRB5KDC_ERR_S_OLD_MAST_KVNO 5 #define KRB5_ET_KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN 6 #define KRB5_ET_KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN 7 #define KRB5_ET_KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE 8 #define KRB5_ET_KRB5KDC_ERR_NULL_KEY 9 #define KRB5_ET_KRB5KDC_ERR_CANNOT_POSTDATE 10 #define KRB5_ET_KRB5KDC_ERR_NEVER_VALID 11 #define KRB5_ET_KRB5KDC_ERR_POLICY 12 #define KRB5_ET_KRB5KDC_ERR_BADOPTION 13 #define KRB5_ET_KRB5KDC_ERR_ETYPE_NOSUPP 14 #define KRB5_ET_KRB5KDC_ERR_SUMTYPE_NOSUPP 15 #define KRB5_ET_KRB5KDC_ERR_PADATA_TYPE_NOSUPP 16 #define KRB5_ET_KRB5KDC_ERR_TRTYPE_NOSUPP 17 #define KRB5_ET_KRB5KDC_ERR_CLIENT_REVOKED 18 #define KRB5_ET_KRB5KDC_ERR_SERVICE_REVOKED 19 #define KRB5_ET_KRB5KDC_ERR_TGT_REVOKED 20 #define KRB5_ET_KRB5KDC_ERR_CLIENT_NOTYET 21 #define KRB5_ET_KRB5KDC_ERR_SERVICE_NOTYET 22 #define KRB5_ET_KRB5KDC_ERR_KEY_EXP 23 #define KRB5_ET_KRB5KDC_ERR_PREAUTH_FAILED 24 #define KRB5_ET_KRB5KDC_ERR_PREAUTH_REQUIRED 25 #define KRB5_ET_KRB5KDC_ERR_SERVER_NOMATCH 26 #define KRB5_ET_KRB5KDC_ERR_MUST_USE_USER2USER 27 #define KRB5_ET_KRB5KDC_ERR_PATH_NOT_ACCEPTED 28 #define KRB5_ET_KRB5KDC_ERR_SVC_UNAVAILABLE 29 #define KRB5_ET_KRB5KRB_AP_ERR_BAD_INTEGRITY 31 #define KRB5_ET_KRB5KRB_AP_ERR_TKT_EXPIRED 32 #define KRB5_ET_KRB5KRB_AP_ERR_TKT_NYV 33 #define KRB5_ET_KRB5KRB_AP_ERR_REPEAT 34 #define KRB5_ET_KRB5KRB_AP_ERR_NOT_US 35 #define KRB5_ET_KRB5KRB_AP_ERR_BADMATCH 36 #define KRB5_ET_KRB5KRB_AP_ERR_SKEW 37 #define KRB5_ET_KRB5KRB_AP_ERR_BADADDR 38 #define KRB5_ET_KRB5KRB_AP_ERR_BADVERSION 39 #define KRB5_ET_KRB5KRB_AP_ERR_MSG_TYPE 40 #define KRB5_ET_KRB5KRB_AP_ERR_MODIFIED 41 #define KRB5_ET_KRB5KRB_AP_ERR_BADORDER 42 #define KRB5_ET_KRB5KRB_AP_ERR_ILL_CR_TKT 43 #define KRB5_ET_KRB5KRB_AP_ERR_BADKEYVER 44 #define KRB5_ET_KRB5KRB_AP_ERR_NOKEY 45 #define KRB5_ET_KRB5KRB_AP_ERR_MUT_FAIL 46 #define KRB5_ET_KRB5KRB_AP_ERR_BADDIRECTION 47 #define KRB5_ET_KRB5KRB_AP_ERR_METHOD 48 #define KRB5_ET_KRB5KRB_AP_ERR_BADSEQ 49 #define KRB5_ET_KRB5KRB_AP_ERR_INAPP_CKSUM 50 #define KRB5_ET_KRB5KDC_AP_PATH_NOT_ACCEPTED 51 #define KRB5_ET_KRB5KRB_ERR_RESPONSE_TOO_BIG 52 #define KRB5_ET_KRB5KRB_ERR_GENERIC 60 #define KRB5_ET_KRB5KRB_ERR_FIELD_TOOLONG 61 #define KRB5_ET_KDC_ERROR_CLIENT_NOT_TRUSTED 62 #define KRB5_ET_KDC_ERROR_KDC_NOT_TRUSTED 63 #define KRB5_ET_KDC_ERROR_INVALID_SIG 64 #define KRB5_ET_KDC_ERR_KEY_TOO_WEAK 65 #define KRB5_ET_KDC_ERR_CERTIFICATE_MISMATCH 66 #define KRB5_ET_KRB_AP_ERR_NO_TGT 67 #define KRB5_ET_KDC_ERR_WRONG_REALM 68 #define KRB5_ET_KRB_AP_ERR_USER_TO_USER_REQUIRED 69 #define KRB5_ET_KDC_ERR_CANT_VERIFY_CERTIFICATE 70 #define KRB5_ET_KDC_ERR_INVALID_CERTIFICATE 71 #define KRB5_ET_KDC_ERR_REVOKED_CERTIFICATE 72 #define KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNKNOWN 73 #define KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNAVAILABLE 74 #define KRB5_ET_KDC_ERR_CLIENT_NAME_MISMATCH 75 #define KRB5_ET_KDC_ERR_KDC_NAME_MISMATCH 76 static const value_string krb5_error_codes[] = { { KRB5_ET_KRB5KDC_ERR_NONE, "KRB5KDC_ERR_NONE" }, { KRB5_ET_KRB5KDC_ERR_NAME_EXP, "KRB5KDC_ERR_NAME_EXP" }, { KRB5_ET_KRB5KDC_ERR_SERVICE_EXP, "KRB5KDC_ERR_SERVICE_EXP" }, { KRB5_ET_KRB5KDC_ERR_BAD_PVNO, "KRB5KDC_ERR_BAD_PVNO" }, { KRB5_ET_KRB5KDC_ERR_C_OLD_MAST_KVNO, "KRB5KDC_ERR_C_OLD_MAST_KVNO" }, { KRB5_ET_KRB5KDC_ERR_S_OLD_MAST_KVNO, "KRB5KDC_ERR_S_OLD_MAST_KVNO" }, { KRB5_ET_KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN, "KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN" }, { KRB5_ET_KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN, "KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN" }, { KRB5_ET_KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE, "KRB5KDC_ERR_PRINCIPAL_NOT_UNIQUE" }, { KRB5_ET_KRB5KDC_ERR_NULL_KEY, "KRB5KDC_ERR_NULL_KEY" }, { KRB5_ET_KRB5KDC_ERR_CANNOT_POSTDATE, "KRB5KDC_ERR_CANNOT_POSTDATE" }, { KRB5_ET_KRB5KDC_ERR_NEVER_VALID, "KRB5KDC_ERR_NEVER_VALID" }, { KRB5_ET_KRB5KDC_ERR_POLICY, "KRB5KDC_ERR_POLICY" }, { KRB5_ET_KRB5KDC_ERR_BADOPTION, "KRB5KDC_ERR_BADOPTION" }, { KRB5_ET_KRB5KDC_ERR_ETYPE_NOSUPP, "KRB5KDC_ERR_ETYPE_NOSUPP" }, { KRB5_ET_KRB5KDC_ERR_SUMTYPE_NOSUPP, "KRB5KDC_ERR_SUMTYPE_NOSUPP" }, { KRB5_ET_KRB5KDC_ERR_PADATA_TYPE_NOSUPP, "KRB5KDC_ERR_PADATA_TYPE_NOSUPP" }, { KRB5_ET_KRB5KDC_ERR_TRTYPE_NOSUPP, "KRB5KDC_ERR_TRTYPE_NOSUPP" }, { KRB5_ET_KRB5KDC_ERR_CLIENT_REVOKED, "KRB5KDC_ERR_CLIENT_REVOKED" }, { KRB5_ET_KRB5KDC_ERR_SERVICE_REVOKED, "KRB5KDC_ERR_SERVICE_REVOKED" }, { KRB5_ET_KRB5KDC_ERR_TGT_REVOKED, "KRB5KDC_ERR_TGT_REVOKED" }, { KRB5_ET_KRB5KDC_ERR_CLIENT_NOTYET, "KRB5KDC_ERR_CLIENT_NOTYET" }, { KRB5_ET_KRB5KDC_ERR_SERVICE_NOTYET, "KRB5KDC_ERR_SERVICE_NOTYET" }, { KRB5_ET_KRB5KDC_ERR_KEY_EXP, "KRB5KDC_ERR_KEY_EXP" }, { KRB5_ET_KRB5KDC_ERR_PREAUTH_FAILED, "KRB5KDC_ERR_PREAUTH_FAILED" }, { KRB5_ET_KRB5KDC_ERR_PREAUTH_REQUIRED, "KRB5KDC_ERR_PREAUTH_REQUIRED" }, { KRB5_ET_KRB5KDC_ERR_SERVER_NOMATCH, "KRB5KDC_ERR_SERVER_NOMATCH" }, { KRB5_ET_KRB5KDC_ERR_MUST_USE_USER2USER, "KRB5KDC_ERR_MUST_USE_USER2USER" }, { KRB5_ET_KRB5KDC_ERR_PATH_NOT_ACCEPTED, "KRB5KDC_ERR_PATH_NOT_ACCEPTED" }, { KRB5_ET_KRB5KDC_ERR_SVC_UNAVAILABLE, "KRB5KDC_ERR_SVC_UNAVAILABLE" }, { KRB5_ET_KRB5KRB_AP_ERR_BAD_INTEGRITY, "KRB5KRB_AP_ERR_BAD_INTEGRITY" }, { KRB5_ET_KRB5KRB_AP_ERR_TKT_EXPIRED, "KRB5KRB_AP_ERR_TKT_EXPIRED" }, { KRB5_ET_KRB5KRB_AP_ERR_TKT_NYV, "KRB5KRB_AP_ERR_TKT_NYV" }, { KRB5_ET_KRB5KRB_AP_ERR_REPEAT, "KRB5KRB_AP_ERR_REPEAT" }, { KRB5_ET_KRB5KRB_AP_ERR_NOT_US, "KRB5KRB_AP_ERR_NOT_US" }, { KRB5_ET_KRB5KRB_AP_ERR_BADMATCH, "KRB5KRB_AP_ERR_BADMATCH" }, { KRB5_ET_KRB5KRB_AP_ERR_SKEW, "KRB5KRB_AP_ERR_SKEW" }, { KRB5_ET_KRB5KRB_AP_ERR_BADADDR, "KRB5KRB_AP_ERR_BADADDR" }, { KRB5_ET_KRB5KRB_AP_ERR_BADVERSION, "KRB5KRB_AP_ERR_BADVERSION" }, { KRB5_ET_KRB5KRB_AP_ERR_MSG_TYPE, "KRB5KRB_AP_ERR_MSG_TYPE" }, { KRB5_ET_KRB5KRB_AP_ERR_MODIFIED, "KRB5KRB_AP_ERR_MODIFIED" }, { KRB5_ET_KRB5KRB_AP_ERR_BADORDER, "KRB5KRB_AP_ERR_BADORDER" }, { KRB5_ET_KRB5KRB_AP_ERR_ILL_CR_TKT, "KRB5KRB_AP_ERR_ILL_CR_TKT" }, { KRB5_ET_KRB5KRB_AP_ERR_BADKEYVER, "KRB5KRB_AP_ERR_BADKEYVER" }, { KRB5_ET_KRB5KRB_AP_ERR_NOKEY, "KRB5KRB_AP_ERR_NOKEY" }, { KRB5_ET_KRB5KRB_AP_ERR_MUT_FAIL, "KRB5KRB_AP_ERR_MUT_FAIL" }, { KRB5_ET_KRB5KRB_AP_ERR_BADDIRECTION, "KRB5KRB_AP_ERR_BADDIRECTION" }, { KRB5_ET_KRB5KRB_AP_ERR_METHOD, "KRB5KRB_AP_ERR_METHOD" }, { KRB5_ET_KRB5KRB_AP_ERR_BADSEQ, "KRB5KRB_AP_ERR_BADSEQ" }, { KRB5_ET_KRB5KRB_AP_ERR_INAPP_CKSUM, "KRB5KRB_AP_ERR_INAPP_CKSUM" }, { KRB5_ET_KRB5KDC_AP_PATH_NOT_ACCEPTED, "KRB5KDC_AP_PATH_NOT_ACCEPTED" }, { KRB5_ET_KRB5KRB_ERR_RESPONSE_TOO_BIG, "KRB5KRB_ERR_RESPONSE_TOO_BIG"}, { KRB5_ET_KRB5KRB_ERR_GENERIC, "KRB5KRB_ERR_GENERIC" }, { KRB5_ET_KRB5KRB_ERR_FIELD_TOOLONG, "KRB5KRB_ERR_FIELD_TOOLONG" }, { KRB5_ET_KDC_ERROR_CLIENT_NOT_TRUSTED, "KDC_ERROR_CLIENT_NOT_TRUSTED" }, { KRB5_ET_KDC_ERROR_KDC_NOT_TRUSTED, "KDC_ERROR_KDC_NOT_TRUSTED" }, { KRB5_ET_KDC_ERROR_INVALID_SIG, "KDC_ERROR_INVALID_SIG" }, { KRB5_ET_KDC_ERR_KEY_TOO_WEAK, "KDC_ERR_KEY_TOO_WEAK" }, { KRB5_ET_KDC_ERR_CERTIFICATE_MISMATCH, "KDC_ERR_CERTIFICATE_MISMATCH" }, { KRB5_ET_KRB_AP_ERR_NO_TGT, "KRB_AP_ERR_NO_TGT" }, { KRB5_ET_KDC_ERR_WRONG_REALM, "KDC_ERR_WRONG_REALM" }, { KRB5_ET_KRB_AP_ERR_USER_TO_USER_REQUIRED, "KRB_AP_ERR_USER_TO_USER_REQUIRED" }, { KRB5_ET_KDC_ERR_CANT_VERIFY_CERTIFICATE, "KDC_ERR_CANT_VERIFY_CERTIFICATE" }, { KRB5_ET_KDC_ERR_INVALID_CERTIFICATE, "KDC_ERR_INVALID_CERTIFICATE" }, { KRB5_ET_KDC_ERR_REVOKED_CERTIFICATE, "KDC_ERR_REVOKED_CERTIFICATE" }, { KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNKNOWN, "KDC_ERR_REVOCATION_STATUS_UNKNOWN" }, { KRB5_ET_KDC_ERR_REVOCATION_STATUS_UNAVAILABLE, "KDC_ERR_REVOCATION_STATUS_UNAVAILABLE" }, { KRB5_ET_KDC_ERR_CLIENT_NAME_MISMATCH, "KDC_ERR_CLIENT_NAME_MISMATCH" }, { KRB5_ET_KDC_ERR_KDC_NAME_MISMATCH, "KDC_ERR_KDC_NAME_MISMATCH" }, { 0, NULL } }; #define PAC_LOGON_INFO 1 #define PAC_CREDENTIAL_TYPE 2 #define PAC_SERVER_CHECKSUM 6 #define PAC_PRIVSVR_CHECKSUM 7 #define PAC_CLIENT_INFO_TYPE 10 #define PAC_S4U_DELEGATION_INFO 11 #define PAC_UPN_DNS_INFO 12 static const value_string w2k_pac_types[] = { { PAC_LOGON_INFO , "Logon Info" }, { PAC_CREDENTIAL_TYPE , "Credential Type" }, { PAC_SERVER_CHECKSUM , "Server Checksum" }, { PAC_PRIVSVR_CHECKSUM , "Privsvr Checksum" }, { PAC_CLIENT_INFO_TYPE , "Client Info Type" }, { PAC_S4U_DELEGATION_INFO, "S4U Delegation Info" }, { PAC_UPN_DNS_INFO , "UPN DNS Info" }, { 0, NULL }, }; static const value_string krb5_princ_types[] = { { KRB5_NT_UNKNOWN , "Unknown" }, { KRB5_NT_PRINCIPAL , "Principal" }, { KRB5_NT_SRV_INST , "Service and Instance" }, { KRB5_NT_SRV_HST , "Service and Host" }, { KRB5_NT_SRV_XHST , "Service and Host Components" }, { KRB5_NT_UID , "Unique ID" }, { KRB5_NT_X500_PRINCIPAL , "Encoded X.509 Distinguished Name" }, { KRB5_NT_SMTP_NAME , "SMTP Name" }, { KRB5_NT_ENTERPRISE , "Enterprise Name" }, { KRB5_NT_MS_PRINCIPAL , "NT 4.0 style name (MS specific)" }, { KRB5_NT_MS_PRINCIPAL_AND_SID , "NT 4.0 style name with SID (MS specific)"}, { KRB5_NT_ENT_PRINCIPAL_AND_SID, "UPN and SID (MS specific)"}, { KRB5_NT_PRINCIPAL_AND_SID , "Principal name and SID (MS specific)"}, { KRB5_NT_SRV_INST_AND_SID , "SPN and SID (MS specific)"}, { 0 , NULL }, }; static const value_string krb5_preauthentication_types[] = { { KRB5_PA_TGS_REQ , "PA-TGS-REQ" }, { KRB5_PA_ENC_TIMESTAMP , "PA-ENC-TIMESTAMP" }, { KRB5_PA_PW_SALT , "PA-PW-SALT" }, { KRB5_PA_ENC_ENCKEY , "PA-ENC-ENCKEY" }, { KRB5_PA_ENC_UNIX_TIME , "PA-ENC-UNIX-TIME" }, { KRB5_PA_ENC_SANDIA_SECURID , "PA-PW-SALT" }, { KRB5_PA_SESAME , "PA-SESAME" }, { KRB5_PA_OSF_DCE , "PA-OSF-DCE" }, { KRB5_PA_CYBERSAFE_SECUREID , "PA-CYBERSAFE-SECURID" }, { KRB5_PA_AFS3_SALT , "PA-AFS3-SALT" }, { KRB5_PA_ENCTYPE_INFO , "PA-ENCTYPE-INFO" }, { KRB5_PA_ENCTYPE_INFO2 , "PA-ENCTYPE-INFO2" }, { KRB5_PA_SAM_CHALLENGE , "PA-SAM-CHALLENGE" }, { KRB5_PA_SAM_RESPONSE , "PA-SAM-RESPONSE" }, { KRB5_PA_PK_AS_REQ , "PA-PK-AS-REQ" }, { KRB5_PA_PK_AS_REP , "PA-PK-AS-REP" }, { KRB5_PA_DASS , "PA-DASS" }, { KRB5_PA_USE_SPECIFIED_KVNO , "PA-USE-SPECIFIED-KVNO" }, { KRB5_PA_SAM_REDIRECT , "PA-SAM-REDIRECT" }, { KRB5_PA_GET_FROM_TYPED_DATA , "PA-GET-FROM-TYPED-DATA" }, { KRB5_PA_SAM_ETYPE_INFO , "PA-SAM-ETYPE-INFO" }, { KRB5_PA_ALT_PRINC , "PA-ALT-PRINC" }, { KRB5_PA_SAM_CHALLENGE2 , "PA-SAM-CHALLENGE2" }, { KRB5_PA_SAM_RESPONSE2 , "PA-SAM-RESPONSE2" }, { KRB5_TD_PKINIT_CMS_CERTIFICATES, "TD-PKINIT-CMS-CERTIFICATES" }, { KRB5_TD_KRB_PRINCIPAL , "TD-KRB-PRINCIPAL" }, { KRB5_TD_KRB_REALM , "TD-KRB-REALM" }, { KRB5_TD_TRUSTED_CERTIFIERS , "TD-TRUSTED-CERTIFIERS" }, { KRB5_TD_CERTIFICATE_INDEX , "TD-CERTIFICATE-INDEX" }, { KRB5_TD_APP_DEFINED_ERROR , "TD-APP-DEFINED-ERROR" }, { KRB5_TD_REQ_NONCE , "TD-REQ-NONCE" }, { KRB5_TD_REQ_SEQ , "TD-REQ-SEQ" }, { KRB5_PA_PAC_REQUEST , "PA-PAC-REQUEST" }, { KRB5_PA_FOR_USER , "PA-FOR-USER" }, { KRB5_PA_PROV_SRV_LOCATION , "PA-PROV-SRV-LOCATION" }, { 0 , NULL }, }; static const value_string krb5_encryption_types[] = { { KRB5_ENCTYPE_NULL , "NULL" }, { KRB5_ENCTYPE_DES_CBC_CRC , "des-cbc-crc" }, { KRB5_ENCTYPE_DES_CBC_MD4 , "des-cbc-md4" }, { KRB5_ENCTYPE_DES_CBC_MD5 , "des-cbc-md5" }, { KRB5_ENCTYPE_DES_CBC_RAW , "des-cbc-raw" }, { KRB5_ENCTYPE_DES3_CBC_SHA , "des3-cbc-sha" }, { KRB5_ENCTYPE_DES3_CBC_RAW , "des3-cbc-raw" }, { KRB5_ENCTYPE_DES_HMAC_SHA1 , "des-hmac-sha1" }, { KRB5_ENCTYPE_DSA_SHA1_CMS , "dsa-sha1-cms" }, { KRB5_ENCTYPE_RSA_MD5_CMS , "rsa-md5-cms" }, { KRB5_ENCTYPE_RSA_SHA1_CMS , "rsa-sha1-cms" }, { KRB5_ENCTYPE_RC2_CBC_ENV , "rc2-cbc-env" }, { KRB5_ENCTYPE_RSA_ENV , "rsa-env" }, { KRB5_ENCTYPE_RSA_ES_OEAP_ENV, "rsa-es-oeap-env" }, { KRB5_ENCTYPE_DES_EDE3_CBC_ENV, "des-ede3-cbc-env" }, { KRB5_ENCTYPE_DES3_CBC_SHA1 , "des3-cbc-sha1" }, { KRB5_ENCTYPE_AES128_CTS_HMAC_SHA1_96 , "aes128-cts-hmac-sha1-96" }, { KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96 , "aes256-cts-hmac-sha1-96" }, { KRB5_ENCTYPE_DES_CBC_MD5_NT , "des-cbc-md5-nt" }, { KERB_ENCTYPE_RC4_HMAC , "rc4-hmac" }, { KERB_ENCTYPE_RC4_HMAC_EXP , "rc4-hmac-exp" }, { KRB5_ENCTYPE_UNKNOWN , "unknown" }, { KRB5_ENCTYPE_LOCAL_DES3_HMAC_SHA1 , "local-des3-hmac-sha1" }, { KRB5_ENCTYPE_RC4_PLAIN_EXP , "rc4-plain-exp" }, { KRB5_ENCTYPE_RC4_PLAIN , "rc4-plain" }, { KRB5_ENCTYPE_RC4_PLAIN_OLD_EXP, "rc4-plain-old-exp" }, { KRB5_ENCTYPE_RC4_HMAC_OLD_EXP, "rc4-hmac-old-exp" }, { KRB5_ENCTYPE_RC4_PLAIN_OLD , "rc4-plain-old" }, { KRB5_ENCTYPE_RC4_HMAC_OLD , "rc4-hmac-old" }, { KRB5_ENCTYPE_DES_PLAIN , "des-plain" }, { KRB5_ENCTYPE_RC4_SHA , "rc4-sha" }, { KRB5_ENCTYPE_RC4_LM , "rc4-lm" }, { KRB5_ENCTYPE_RC4_PLAIN2 , "rc4-plain2" }, { KRB5_ENCTYPE_RC4_MD4 , "rc4-md4" }, { 0 , NULL }, }; static const value_string krb5_checksum_types[] = { { KRB5_CHKSUM_NONE , "none" }, { KRB5_CHKSUM_CRC32 , "crc32" }, { KRB5_CHKSUM_MD4 , "md4" }, { KRB5_CHKSUM_KRB_DES_MAC , "krb-des-mac" }, { KRB5_CHKSUM_KRB_DES_MAC_K , "krb-des-mac-k" }, { KRB5_CHKSUM_MD5 , "md5" }, { KRB5_CHKSUM_MD5_DES , "md5-des" }, { KRB5_CHKSUM_MD5_DES3 , "md5-des3" }, { KRB5_CHKSUM_HMAC_SHA1_DES3_KD, "hmac-sha1-des3-kd" }, { KRB5_CHKSUM_HMAC_SHA1_DES3 , "hmac-sha1-des3" }, { KRB5_CHKSUM_SHA1_UNKEYED , "sha1 (unkeyed)" }, { KRB5_CHKSUM_HMAC_MD5 , "hmac-md5" }, { KRB5_CHKSUM_MD5_HMAC , "md5-hmac" }, { KRB5_CHKSUM_RC4_MD5 , "rc5-md5" }, { KRB5_CHKSUM_MD25 , "md25" }, { KRB5_CHKSUM_DES_MAC_MD5 , "des-mac-md5" }, { KRB5_CHKSUM_DES_MAC , "des-mac" }, { KRB5_CHKSUM_REAL_CRC32 , "real-crc32" }, { KRB5_CHKSUM_SHA1 , "sha1" }, { KRB5_CHKSUM_LM , "lm" }, { KRB5_CHKSUM_GSSAPI , "gssapi-8003" }, { 0 , NULL }, }; #define KRB5_AD_IF_RELEVANT 1 #define KRB5_AD_INTENDED_FOR_SERVER 2 #define KRB5_AD_INTENDED_FOR_APPLICATION_CLASS 3 #define KRB5_AD_KDC_ISSUED 4 #define KRB5_AD_OR 5 #define KRB5_AD_MANDATORY_TICKET_EXTENSIONS 6 #define KRB5_AD_IN_TICKET_EXTENSIONS 7 #define KRB5_AD_MANDATORY_FOR_KDC 8 #define KRB5_AD_OSF_DCE 64 #define KRB5_AD_SESAME 65 #define KRB5_AD_OSF_DCE_PKI_CERTID 66 #define KRB5_AD_WIN2K_PAC 128 #define KRB5_AD_SIGNTICKET 0xffffffef static const value_string krb5_ad_types[] = { { KRB5_AD_IF_RELEVANT , "AD-IF-RELEVANT" }, { KRB5_AD_INTENDED_FOR_SERVER , "AD-Intended-For-Server" }, { KRB5_AD_INTENDED_FOR_APPLICATION_CLASS , "AD-Intended-For-Application-Class" }, { KRB5_AD_KDC_ISSUED , "AD-KDCIssued" }, { KRB5_AD_OR , "AD-AND-OR" }, { KRB5_AD_MANDATORY_TICKET_EXTENSIONS , "AD-Mandatory-Ticket-Extensions" }, { KRB5_AD_IN_TICKET_EXTENSIONS , "AD-IN-Ticket-Extensions" }, { KRB5_AD_MANDATORY_FOR_KDC , "AD-MANDATORY-FOR-KDC" }, { KRB5_AD_OSF_DCE , "AD-OSF-DCE" }, { KRB5_AD_SESAME , "AD-SESAME" }, { KRB5_AD_OSF_DCE_PKI_CERTID , "AD-OSF-DCE-PKI-CertID" }, { KRB5_AD_WIN2K_PAC , "AD-Win2k-PAC" }, { KRB5_AD_SIGNTICKET , "AD-SignTicket" }, { 0 , NULL }, }; static const value_string krb5_transited_types[] = { { 1 , "DOMAIN-X500-COMPRESS" }, { 0 , NULL } }; static const value_string krb5_address_types[] = { { KRB5_ADDR_IPv4, "IPv4"}, { KRB5_ADDR_CHAOS, "CHAOS"}, { KRB5_ADDR_XEROX, "XEROX"}, { KRB5_ADDR_ISO, "ISO"}, { KRB5_ADDR_DECNET, "DECNET"}, { KRB5_ADDR_APPLETALK, "APPLETALK"}, { KRB5_ADDR_NETBIOS, "NETBIOS"}, { KRB5_ADDR_IPv6, "IPv6"}, { 0, NULL }, }; static const value_string krb5_msg_types[] = { { KRB5_MSG_TICKET, "Ticket" }, { KRB5_MSG_AUTHENTICATOR, "Authenticator" }, { KRB5_MSG_ENC_TICKET_PART, "EncTicketPart" }, { KRB5_MSG_TGS_REQ, "TGS-REQ" }, { KRB5_MSG_TGS_REP, "TGS-REP" }, { KRB5_MSG_AS_REQ, "AS-REQ" }, { KRB5_MSG_AS_REP, "AS-REP" }, { KRB5_MSG_AP_REQ, "AP-REQ" }, { KRB5_MSG_AP_REP, "AP-REP" }, { KRB5_MSG_SAFE, "KRB-SAFE" }, { KRB5_MSG_PRIV, "KRB-PRIV" }, { KRB5_MSG_CRED, "KRB-CRED" }, { KRB5_MSG_ENC_AS_REP_PART, "EncASRepPart" }, { KRB5_MSG_ENC_TGS_REP_PART, "EncTGSRepPart" }, { KRB5_MSG_ENC_AP_REP_PART, "EncAPRepPart" }, { KRB5_MSG_ENC_KRB_PRIV_PART, "EncKrbPrivPart" }, { KRB5_MSG_ENC_KRB_CRED_PART, "EncKrbCredPart" }, { KRB5_MSG_ERROR, "KRB-ERROR" }, { 0, NULL }, }; #define KRB5_GSS_C_DELEG_FLAG 0x01 #define KRB5_GSS_C_MUTUAL_FLAG 0x02 #define KRB5_GSS_C_REPLAY_FLAG 0x04 #define KRB5_GSS_C_SEQUENCE_FLAG 0x08 #define KRB5_GSS_C_CONF_FLAG 0x10 #define KRB5_GSS_C_INTEG_FLAG 0x20 #define KRB5_GSS_C_DCE_STYLE 0x1000 static const true_false_string tfs_gss_flags_deleg = { "Delegate credentials to remote peer", "Do NOT delegate" }; static const true_false_string tfs_gss_flags_mutual = { "Request that remote peer authenticates itself", "Mutual authentication NOT required" }; static const true_false_string tfs_gss_flags_replay = { "Enable replay protection for signed or sealed messages", "Do NOT enable replay protection" }; static const true_false_string tfs_gss_flags_sequence = { "Enable Out-of-sequence detection for sign or sealed messages", "Do NOT enable out-of-sequence detection" }; static const true_false_string tfs_gss_flags_conf = { "Confidentiality (sealing) may be invoked", "Do NOT use Confidentiality (sealing)" }; static const true_false_string tfs_gss_flags_integ = { "Integrity protection (signing) may be invoked", "Do NOT use integrity protection" }; static const true_false_string tfs_gss_flags_dce_style = { "DCE-STYLE", "Not using DCE-STYLE" }; #ifdef HAVE_KERBEROS static int dissect_krb5_decrypt_ticket_data (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * All Ticket encrypted parts use usage == 2 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 2, next_tvb, etype, NULL); if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } static int dissect_krb5_decrypt_authenticator_data (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * Authenticators are encrypted with usage * == 7 or * == 11 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 7, next_tvb, etype, NULL); if(!plaintext){ plaintext=decrypt_krb5_data(tree, actx->pinfo, 11, next_tvb, etype, NULL); } if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } static int dissect_krb5_decrypt_KDC_REP_data (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * ASREP/TGSREP encryptedparts are encrypted with usage * == 3 or * == 8 or * == 9 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 3, next_tvb, etype, NULL); if(!plaintext){ plaintext=decrypt_krb5_data(tree, actx->pinfo, 8, next_tvb, etype, NULL); } if(!plaintext){ plaintext=decrypt_krb5_data(tree, actx->pinfo, 9, next_tvb, etype, NULL); } if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } static int dissect_krb5_decrypt_PA_ENC_TIMESTAMP (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * AS-REQ PA_ENC_TIMESTAMP are encrypted with usage * == 1 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 1, next_tvb, etype, NULL); if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } static int dissect_krb5_decrypt_AP_REP_data (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* draft-ietf-krb-wg-kerberos-clarifications-05.txt : * 7.5.1 * AP-REP are encrypted with usage == 12 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 12, next_tvb, etype, NULL); if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } static int dissect_krb5_decrypt_PRIV_data (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* RFC4120 : * EncKrbPrivPart encrypted with usage * == 13 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 13, next_tvb, etype, NULL); if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } static int dissect_krb5_decrypt_CRED_data (gboolean imp_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) { guint8 *plaintext; int length; guint32 etype = 0; tvbuff_t *next_tvb; next_tvb=tvb_new_subset_remaining(tvb, offset); length=tvb_length_remaining(tvb, offset); if (actx->value_ptr) { etype = *((guint32*)actx->value_ptr); } /* RFC4120 : * EncKrbCredPart encrypted with usage * == 14 */ plaintext=decrypt_krb5_data(tree, actx->pinfo, 14, next_tvb, etype, NULL); if(plaintext){ tvbuff_t *child_tvb; child_tvb = tvb_new_child_real_data(tvb, plaintext, length, length); tvb_set_free_cb(child_tvb, g_free); /* Add the decrypted data to the data source list. */ add_new_data_source(actx->pinfo, child_tvb, "Decrypted Krb5"); offset=dissect_kerberos_Applications(FALSE, child_tvb, 0, actx , tree, /* hf_index*/ -1); } return offset; } #endif /* Dissect a GSSAPI checksum as per RFC1964. This is NOT ASN.1 encoded. */ static int dissect_krb5_rfc1964_checksum(asn1_ctx_t *actx _U_, proto_tree *tree, tvbuff_t *tvb) { int offset=0; guint32 len; guint16 dlglen; /* Length of Bnd field */ len=tvb_get_letohl(tvb, offset); proto_tree_add_item(tree, hf_krb_gssapi_len, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; /* Bnd field */ proto_tree_add_item(tree, hf_krb_gssapi_bnd, tvb, offset, len, ENC_NA); offset += len; /* flags */ proto_tree_add_item(tree, hf_krb_gssapi_c_flag_dce_style, tvb, offset, 4, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_krb_gssapi_c_flag_integ, tvb, offset, 4, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_krb_gssapi_c_flag_conf, tvb, offset, 4, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_krb_gssapi_c_flag_sequence, tvb, offset, 4, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_krb_gssapi_c_flag_replay, tvb, offset, 4, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_krb_gssapi_c_flag_mutual, tvb, offset, 4, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_krb_gssapi_c_flag_deleg, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; /* the next fields are optional so we have to check that we have * more data in our buffers */ if(tvb_length_remaining(tvb, offset)<2){ return offset; } /* dlgopt identifier */ proto_tree_add_item(tree, hf_krb_gssapi_dlgopt, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; if(tvb_length_remaining(tvb, offset)<2){ return offset; } /* dlglen identifier */ dlglen=tvb_get_letohs(tvb, offset); proto_tree_add_item(tree, hf_krb_gssapi_dlglen, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; if(dlglen!=tvb_length_remaining(tvb, offset)){ proto_tree_add_text(tree, tvb, 0, 0, "Error: DlgLen:%d is not the same as number of bytes remaining:%d", dlglen, tvb_length_remaining(tvb, offset)); return offset; } /* this should now be a KRB_CRED message */ offset=dissect_kerberos_Applications(FALSE, tvb, offset, actx, tree, /* hf_index */ -1); return offset; } static int dissect_krb5_PA_PROV_SRV_LOCATION(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset=dissect_ber_GeneralString(actx, tree, tvb, offset, hf_krb_provsrv_location, NULL, 0); return offset; } static int dissect_krb5_PW_SALT(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { guint32 nt_status; /* Microsoft stores a special 12 byte blob here * guint32 NT_status * guint32 unknown * guint32 unknown * decode everything as this blob for now until we see if anyone * else ever uses it or we learn how to tell whether this * is such an MS blob or not. */ proto_tree_add_item(tree, hf_krb_smb_nt_status, tvb, offset, 4, ENC_LITTLE_ENDIAN); nt_status=tvb_get_letohl(tvb, offset); if(nt_status) { col_append_fstr(actx->pinfo->cinfo, COL_INFO, " NT Status: %s", val_to_str(nt_status, NT_errors, "Unknown error code %#x")); } offset += 4; proto_tree_add_item(tree, hf_krb_smb_unknown, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_krb_smb_unknown, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; return offset; } #include "packet-kerberos-fn.c" /* Make wrappers around exported functions for now */ int dissect_krb5_Checksum(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_) { return dissect_kerberos_Checksum(FALSE, tvb, offset, actx, tree, hf_kerberos_cksum); } int dissect_krb5_ctime(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_) { return dissect_kerberos_KerberosTime(FALSE, tvb, offset, actx, tree, hf_kerberos_ctime); } int dissect_krb5_cname(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_) { return dissect_kerberos_PrincipalName(FALSE, tvb, offset, actx, tree, hf_kerberos_cname); } int dissect_krb5_realm(proto_tree *tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_) { return dissect_kerberos_Realm(FALSE, tvb, offset, actx, tree, hf_kerberos_realm); } static gint dissect_kerberos_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean dci, gboolean do_col_protocol, gboolean have_rm, kerberos_callbacks *cb) { volatile int offset = 0; proto_tree *volatile kerberos_tree = NULL; proto_item *volatile item = NULL; asn1_ctx_t asn1_ctx; /* TCP record mark and length */ guint32 krb_rm = 0; gint krb_reclen = 0; gbl_do_col_info=dci; if (have_rm) { krb_rm = tvb_get_ntohl(tvb, offset); krb_reclen = kerberos_rm_to_reclen(krb_rm); /* * What is a reasonable size limit? */ if (krb_reclen > 10 * 1024 * 1024) { return (-1); } if (do_col_protocol) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5"); } if (tree) { item = proto_tree_add_item(tree, proto_kerberos, tvb, 0, -1, ENC_NA); kerberos_tree = proto_item_add_subtree(item, ett_kerberos); } show_krb_recordmark(kerberos_tree, tvb, offset, krb_rm); offset += 4; } else { /* Do some sanity checking here, * All krb5 packets start with a TAG class that is BER_CLASS_APP * and a tag value that is either of the values below: * If it doesnt look like kerberos, return 0 and let someone else have * a go at it. */ gint8 tmp_class; gboolean tmp_pc; gint32 tmp_tag; get_ber_identifier(tvb, offset, &tmp_class, &tmp_pc, &tmp_tag); if(tmp_class!=BER_CLASS_APP){ return 0; } switch(tmp_tag){ case KRB5_MSG_TICKET: case KRB5_MSG_AUTHENTICATOR: case KRB5_MSG_ENC_TICKET_PART: case KRB5_MSG_AS_REQ: case KRB5_MSG_AS_REP: case KRB5_MSG_TGS_REQ: case KRB5_MSG_TGS_REP: case KRB5_MSG_AP_REQ: case KRB5_MSG_AP_REP: case KRB5_MSG_ENC_AS_REP_PART: case KRB5_MSG_ENC_TGS_REP_PART: case KRB5_MSG_ENC_AP_REP_PART: case KRB5_MSG_ENC_KRB_PRIV_PART: case KRB5_MSG_ENC_KRB_CRED_PART: case KRB5_MSG_SAFE: case KRB5_MSG_PRIV: case KRB5_MSG_ERROR: break; default: return 0; } if (do_col_protocol) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5"); } if (gbl_do_col_info) { col_clear(pinfo->cinfo, COL_INFO); } if (tree) { item = proto_tree_add_item(tree, proto_kerberos, tvb, 0, -1, ENC_NA); kerberos_tree = proto_item_add_subtree(item, ett_kerberos); } } asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo); asn1_ctx.private_data = cb; TRY { offset=dissect_kerberos_Applications(FALSE, tvb, 0, &asn1_ctx , tree, /* hf_index */ -1); } CATCH_BOUNDS_ERRORS { RETHROW; } ENDTRY; proto_item_set_len(item, offset); return offset; } /* * Display the TCP record mark. */ void show_krb_recordmark(proto_tree *tree, tvbuff_t *tvb, gint start, guint32 krb_rm) { gint rec_len; proto_item *rm_item; proto_tree *rm_tree; if (tree == NULL) return; rec_len = kerberos_rm_to_reclen(krb_rm); rm_item = proto_tree_add_text(tree, tvb, start, 4, "Record Mark: %u %s", rec_len, plurality(rec_len, "byte", "bytes")); rm_tree = proto_item_add_subtree(rm_item, ett_krb_recordmark); proto_tree_add_boolean(rm_tree, hf_krb_rm_reserved, tvb, start, 4, krb_rm); proto_tree_add_uint(rm_tree, hf_krb_rm_reclen, tvb, start, 4, krb_rm); } gint dissect_kerberos_main(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int do_col_info, kerberos_callbacks *cb) { return (dissect_kerberos_common(tvb, pinfo, tree, do_col_info, FALSE, FALSE, cb)); } guint32 kerberos_output_keytype(void) { return gbl_keytype; } static gint dissect_kerberos_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { /* Some weird kerberos implementation apparently do krb4 on the krb5 port. Since all (except weirdo transarc krb4 stuff) use an opcode <=16 in the first byte, use this to see if it might be krb4. All krb5 commands start with an APPL tag and thus is >=0x60 so if first byte is <=16 just blindly assume it is krb4 then */ if(tvb_length(tvb) >= 1 && tvb_get_guint8(tvb, 0)<=0x10){ if(krb4_handle){ gboolean res; res=call_dissector_only(krb4_handle, tvb, pinfo, tree, NULL); return res; }else{ return 0; } } return dissect_kerberos_common(tvb, pinfo, tree, TRUE, TRUE, FALSE, NULL); } gint kerberos_rm_to_reclen(guint krb_rm) { return (krb_rm & KRB_RM_RECLEN); } guint get_krb_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset) { guint krb_rm; gint pdulen; krb_rm = tvb_get_ntohl(tvb, offset); pdulen = kerberos_rm_to_reclen(krb_rm); return (pdulen + 4); } static void kerberos_prefs_apply_cb(void) { #ifdef HAVE_LIBNETTLE clear_keytab(); read_keytab_file(keytab_filename); #endif } static int dissect_kerberos_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { pinfo->fragmented = TRUE; if (dissect_kerberos_common(tvb, pinfo, tree, TRUE, TRUE, TRUE, NULL) < 0) { /* * The dissector failed to recognize this as a valid * Kerberos message. Mark it as a continuation packet. */ col_set_str(pinfo->cinfo, COL_INFO, "Continuation"); } return tvb_length(tvb); } static int dissect_kerberos_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "KRB5"); col_clear(pinfo->cinfo, COL_INFO); tcp_dissect_pdus(tvb, pinfo, tree, krb_desegment, 4, get_krb_pdu_len, dissect_kerberos_tcp_pdu, data); return tvb_length(tvb); } /*--- proto_register_kerberos -------------------------------------------*/ void proto_register_kerberos(void) { /* List of fields */ static hf_register_info hf[] = { { &hf_krb_rm_reserved, { "Reserved", "kerberos.rm.reserved", FT_BOOLEAN, 32, &bitval, KRB_RM_RESERVED, "Record mark reserved bit", HFILL }}, { &hf_krb_rm_reclen, { "Record Length", "kerberos.rm.length", FT_UINT32, BASE_DEC, NULL, KRB_RM_RECLEN, NULL, HFILL }}, { &hf_krb_provsrv_location, { "PROVSRV Location", "kerberos.provsrv_location", FT_STRING, BASE_NONE, NULL, 0, "PacketCable PROV SRV Location", HFILL }}, { &hf_krb_smb_nt_status, { "NT Status", "kerberos.smb.nt_status", FT_UINT32, BASE_HEX, VALS(NT_errors), 0, "NT Status code", HFILL }}, { &hf_krb_smb_unknown, { "Unknown", "kerberos.smb.unknown", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL }}, { &hf_krb_address_ip, { "IP Address", "kerberos.addr_ip", FT_IPv4, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_krb_address_ipv6, { "IPv6 Address", "kerberos.addr_ipv6", FT_IPv6, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_krb_address_netbios, { "NetBIOS Address", "kerberos.addr_nb", FT_STRING, BASE_NONE, NULL, 0, "NetBIOS Address and type", HFILL }}, { &hf_krb_gssapi_len, { "Length", "kerberos.gssapi.len", FT_UINT32, BASE_DEC, NULL, 0, "Length of GSSAPI Bnd field", HFILL }}, { &hf_krb_gssapi_bnd, { "Bnd", "kerberos.gssapi.bdn", FT_BYTES, BASE_NONE, NULL, 0, "GSSAPI Bnd field", HFILL }}, { &hf_krb_gssapi_c_flag_deleg, { "Deleg", "kerberos.gssapi.checksum.flags.deleg", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_deleg), KRB5_GSS_C_DELEG_FLAG, NULL, HFILL }}, { &hf_krb_gssapi_c_flag_mutual, { "Mutual", "kerberos.gssapi.checksum.flags.mutual", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_mutual), KRB5_GSS_C_MUTUAL_FLAG, NULL, HFILL }}, { &hf_krb_gssapi_c_flag_replay, { "Replay", "kerberos.gssapi.checksum.flags.replay", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_replay), KRB5_GSS_C_REPLAY_FLAG, NULL, HFILL }}, { &hf_krb_gssapi_c_flag_sequence, { "Sequence", "kerberos.gssapi.checksum.flags.sequence", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_sequence), KRB5_GSS_C_SEQUENCE_FLAG, NULL, HFILL }}, { &hf_krb_gssapi_c_flag_conf, { "Conf", "kerberos.gssapi.checksum.flags.conf", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_conf), KRB5_GSS_C_CONF_FLAG, NULL, HFILL }}, { &hf_krb_gssapi_c_flag_integ, { "Integ", "kerberos.gssapi.checksum.flags.integ", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_integ), KRB5_GSS_C_INTEG_FLAG, NULL, HFILL }}, { &hf_krb_gssapi_c_flag_dce_style, { "DCE-style", "kerberos.gssapi.checksum.flags.dce-style", FT_BOOLEAN, 32, TFS(&tfs_gss_flags_dce_style), KRB5_GSS_C_DCE_STYLE, NULL, HFILL }}, { &hf_krb_gssapi_dlgopt, { "DlgOpt", "kerberos.gssapi.dlgopt", FT_UINT16, BASE_DEC, NULL, 0, "GSSAPI DlgOpt", HFILL }}, { &hf_krb_gssapi_dlglen, { "DlgLen", "kerberos.gssapi.dlglen", FT_UINT16, BASE_DEC, NULL, 0, "GSSAPI DlgLen", HFILL }}, #include "packet-kerberos-hfarr.c" }; /* List of subtrees */ static gint *ett[] = { &ett_kerberos, &ett_krb_recordmark, #include "packet-kerberos-ettarr.c" }; static ei_register_info ei[] = { { &ei_kerberos_decrypted_keytype, { "kerberos.decrypted_keytype", PI_SECURITY, PI_CHAT, "Decryted keytype", EXPFILL }}, }; expert_module_t* expert_krb; 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)); expert_krb = expert_register_protocol(proto_kerberos); expert_register_field_array(expert_krb, ei, array_length(ei)); /* 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_filename_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_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_connect_fns = { wrap_dissect_gss_kerb, /* Bind */ wrap_dissect_gss_kerb, /* Bind ACK */ wrap_dissect_gss_kerb, /* AUTH3 */ NULL, /* Request verifier */ NULL, /* Response verifier */ NULL, /* Request data */ NULL /* Response data */ }; static dcerpc_auth_subdissector_fns gss_kerb_auth_sign_fns = { wrap_dissect_gss_kerb, /* Bind */ wrap_dissect_gss_kerb, /* Bind ACK */ wrap_dissect_gss_kerb, /* AUTH3 */ wrap_dissect_gssapi_verf, /* Request verifier */ wrap_dissect_gssapi_verf, /* Response verifier */ NULL, /* Request data */ NULL /* Response data */ }; static dcerpc_auth_subdissector_fns gss_kerb_auth_seal_fns = { wrap_dissect_gss_kerb, /* Bind */ wrap_dissect_gss_kerb, /* Bind ACK */ wrap_dissect_gss_kerb, /* AUTH3 */ wrap_dissect_gssapi_verf, /* Request verifier */ wrap_dissect_gssapi_verf, /* Response verifier */ wrap_dissect_gssapi_payload, /* Request data */ wrap_dissect_gssapi_payload /* Response data */ }; void proto_reg_handoff_kerberos(void) { dissector_handle_t kerberos_handle_tcp; krb4_handle = find_dissector("krb4"); kerberos_handle_udp = new_create_dissector_handle(dissect_kerberos_udp, proto_kerberos); kerberos_handle_tcp = create_dissector_handle(dissect_kerberos_tcp, proto_kerberos); dissector_add_uint("udp.port", UDP_PORT_KERBEROS, kerberos_handle_udp); dissector_add_uint("tcp.port", TCP_PORT_KERBEROS, kerberos_handle_tcp); register_dcerpc_auth_subdissector(DCE_C_AUTHN_LEVEL_CONNECT, DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS, &gss_kerb_auth_connect_fns); register_dcerpc_auth_subdissector(DCE_C_AUTHN_LEVEL_PKT_INTEGRITY, DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS, &gss_kerb_auth_sign_fns); register_dcerpc_auth_subdissector(DCE_C_AUTHN_LEVEL_PKT_PRIVACY, DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS, &gss_kerb_auth_seal_fns); }