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Edit File : kdb.h \| Size : 67.66 KB
/* -- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -- / / * Copyright 1990, 1991, 2016 by the Massachusetts Institute of Technology. * All Rights Reserved. * * Export of this software from the United States of America may * require a specific license from the United States Government. * It is the responsibility of any person or organization contemplating * export to obtain such a license before exporting. * * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and * distribute this software and its documentation for any purpose and * without fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright notice and * this permission notice appear in supporting documentation, and that * the name of M.I.T. not be used in advertising or publicity pertaining * to distribution of the software without specific, written prior * permission. Furthermore if you modify this software you must label * your software as modified software and not distribute it in such a * fashion that it might be confused with the original M.I.T. software. * M.I.T. makes no representations about the suitability of * this software for any purpose. It is provided "as is" without express * or implied warranty. / / * Copyright (C) 1998 by the FundsXpress, INC. * * All rights reserved. * * Export of this software from the United States of America may require * a specific license from the United States Government. It is the * responsibility of any person or organization contemplating export to * obtain such a license before exporting. * * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and * distribute this software and its documentation for any purpose and * without fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright notice and * this permission notice appear in supporting documentation, and that * the name of FundsXpress. not be used in advertising or publicity pertaining * to distribution of the software without specific, written prior * permission. FundsXpress makes no representations about the suitability of * this software for any purpose. It is provided "as is" without express * or implied warranty. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. / / * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. / / KDC Database interface definitions / / This API is not considered as stable as the main krb5 API. * * - We may make arbitrary incompatible changes between feature * releases (e.g. from 1.7 to 1.8). * - We will make some effort to avoid making incompatible changes for * bugfix releases, but will make them if necessary. / #ifndef KRB5_KDB5__ #define KRB5_KDB5__ #include <krb5.h> / This version will be incremented when incompatible changes are made to the * KDB API, and will be kept in sync with the libkdb major version. / #define KRB5_KDB_API_VERSION 10 / Salt types / #define KRB5_KDB_SALTTYPE_NORMAL 0 / #define KRB5_KDB_SALTTYPE_V4 1 / #define KRB5_KDB_SALTTYPE_NOREALM 2 #define KRB5_KDB_SALTTYPE_ONLYREALM 3 #define KRB5_KDB_SALTTYPE_SPECIAL 4 / #define KRB5_KDB_SALTTYPE_AFS3 5 / #define KRB5_KDB_SALTTYPE_CERTHASH 6 / Attributes / #define KRB5_KDB_DISALLOW_POSTDATED 0x00000001 #define KRB5_KDB_DISALLOW_FORWARDABLE 0x00000002 #define KRB5_KDB_DISALLOW_TGT_BASED 0x00000004 #define KRB5_KDB_DISALLOW_RENEWABLE 0x00000008 #define KRB5_KDB_DISALLOW_PROXIABLE 0x00000010 #define KRB5_KDB_DISALLOW_DUP_SKEY 0x00000020 #define KRB5_KDB_DISALLOW_ALL_TIX 0x00000040 #define KRB5_KDB_REQUIRES_PRE_AUTH 0x00000080 #define KRB5_KDB_REQUIRES_HW_AUTH 0x00000100 #define KRB5_KDB_REQUIRES_PWCHANGE 0x00000200 #define KRB5_KDB_DISALLOW_SVR 0x00001000 #define KRB5_KDB_PWCHANGE_SERVICE 0x00002000 #define KRB5_KDB_SUPPORT_DESMD5 0x00004000 #define KRB5_KDB_NEW_PRINC 0x00008000 #define KRB5_KDB_OK_AS_DELEGATE 0x00100000 #define KRB5_KDB_OK_TO_AUTH_AS_DELEGATE 0x00200000 / S4U2Self OK / #define KRB5_KDB_NO_AUTH_DATA_REQUIRED 0x00400000 #define KRB5_KDB_LOCKDOWN_KEYS 0x00800000 / Creation flags / #define KRB5_KDB_CREATE_BTREE 0x00000001 #define KRB5_KDB_CREATE_HASH 0x00000002 / Entry get flags / / Name canonicalization requested / #define KRB5_KDB_FLAG_CANONICALIZE 0x00000010 / Include authorization data generated by backend / #define KRB5_KDB_FLAG_INCLUDE_PAC 0x00000020 / Is AS-REQ (client referrals only) / #define KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY 0x00000040 / Map cross-realm principals / #define KRB5_KDB_FLAG_MAP_PRINCIPALS 0x00000080 / Protocol transition / #define KRB5_KDB_FLAG_PROTOCOL_TRANSITION 0x00000100 / Constrained delegation / #define KRB5_KDB_FLAG_CONSTRAINED_DELEGATION 0x00000200 / User-to-user / #define KRB5_KDB_FLAG_USER_TO_USER 0x00000800 / Cross-realm / #define KRB5_KDB_FLAG_CROSS_REALM 0x00001000 / Issuing referral / #define KRB5_KDB_FLAG_ISSUING_REFERRAL 0x00004000 #define KRB5_KDB_FLAGS_S4U ( KRB5_KDB_FLAG_PROTOCOL_TRANSITION \| \ KRB5_KDB_FLAG_CONSTRAINED_DELEGATION ) / KDB iteration flags / #define KRB5_DB_ITER_WRITE 0x00000001 #define KRB5_DB_ITER_REV 0x00000002 #define KRB5_DB_ITER_RECURSE 0x00000004 / String attribute names recognized by krb5 / #define KRB5_KDB_SK_SESSION_ENCTYPES "session_enctypes" #define KRB5_KDB_SK_REQUIRE_AUTH "require_auth" #define KRB5_KDB_SK_OPTIONAL_AD_SIGNEDPATH "optional_ad_signedpath" #if !defined(_WIN32) / * Note --- these structures cannot be modified without changing the * database version number in libkdb.a, but should be expandable by * adding new tl_data types. / typedef struct _krb5_tl_data { struct _krb5_tl_data tl_data_next; /* NOT saved / krb5_int16 tl_data_type; krb5_ui_2 tl_data_length; krb5_octet tl_data_contents; } krb5_tl_data; /* String attributes (currently stored inside tl-data) map C string keys to * values. They can be set via kadmin and consumed by KDC plugins. / typedef struct krb5_string_attr_st { char key; char value; } krb5_string_attr; / * If this ever changes up the version number and make the arrays be as * big as necessary. * * Currently the first type is the enctype and the second is the salt type. / typedef struct _krb5_key_data { krb5_int16 key_data_ver; / Version / krb5_ui_2 key_data_kvno; / Key Version / krb5_int16 key_data_type[2]; / Array of types / krb5_ui_2 key_data_length[2]; / Array of lengths / krb5_octet key_data_contents[2]; /* Array of pointers / } krb5_key_data; #define KRB5_KDB_V1_KEY_DATA_ARRAY 2 / # of array elements / typedef struct _krb5_keysalt { krb5_int16 type; krb5_data data; / Length, data / } krb5_keysalt; / * A principal database entry. Extensions to this structure currently use the * tl_data list. The e_data and e_length fields are not used by any calling * code except kdb5_util dump and load, which marshal and unmarshal the array * in the dump record. KDB modules may use these fields internally as long as * they set e_length appropriately (non-zero if the data should be marshalled * across dump and load, zero if not) and handle null e_data values in * caller-constructed principal entries. / typedef struct _krb5_db_entry_new { krb5_magic magic; / NOT saved / krb5_ui_2 len; krb5_ui_4 mask; / members currently changed/set / krb5_flags attributes; krb5_deltat max_life; krb5_deltat max_renewable_life; krb5_timestamp expiration; / When the client expires / krb5_timestamp pw_expiration; / When its passwd expires / krb5_timestamp last_success; / Last successful passwd / krb5_timestamp last_failed; / Last failed passwd attempt / krb5_kvno fail_auth_count; / # of failed passwd attempt / krb5_int16 n_tl_data; krb5_int16 n_key_data; krb5_ui_2 e_length; / Length of extra data / krb5_octet e_data; /* Extra data to be saved / krb5_principal princ; / Length, data / krb5_tl_data tl_data; /* Linked list / / key_data must be sorted by kvno in descending order. / krb5_key_data key_data; /* Array / } krb5_db_entry; typedef struct _osa_policy_ent_t { int version; char name; krb5_ui_4 pw_min_life; krb5_ui_4 pw_max_life; krb5_ui_4 pw_min_length; krb5_ui_4 pw_min_classes; krb5_ui_4 pw_history_num; krb5_ui_4 policy_refcnt; /* no longer used / / Only valid if version > 1 / krb5_ui_4 pw_max_fail; / pwdMaxFailure / krb5_ui_4 pw_failcnt_interval; / pwdFailureCountInterval / krb5_ui_4 pw_lockout_duration; / pwdLockoutDuration / / Only valid if version > 2 / krb5_ui_4 attributes; krb5_ui_4 max_life; krb5_ui_4 max_renewable_life; char allowed_keysalts; krb5_int16 n_tl_data; krb5_tl_data * tl_data; } osa_policy_ent_rec, osa_policy_ent_t; typedef void (osa_adb_iter_policy_func) (void , osa_policy_ent_t); typedef struct __krb5_key_salt_tuple { krb5_enctype ks_enctype; krb5_int32 ks_salttype; } krb5_key_salt_tuple; #define KRB5_KDB_MAGIC_NUMBER 0xdbdbdbdb #define KRB5_KDB_V1_BASE_LENGTH 38 #define KRB5_KDB_MAX_ALLOWED_KS_LEN 512 #define KRB5_TL_LAST_PWD_CHANGE 0x0001 #define KRB5_TL_MOD_PRINC 0x0002 #define KRB5_TL_KADM_DATA 0x0003 #define KRB5_TL_KADM5_E_DATA 0x0004 #define KRB5_TL_RB1_CHALLENGE 0x0005 #ifdef SECURID #define KRB5_TL_SECURID_STATE 0x0006 #endif / SECURID / #define KRB5_TL_USER_CERTIFICATE 0x0007 #define KRB5_TL_MKVNO 0x0008 #define KRB5_TL_ACTKVNO 0x0009 #define KRB5_TL_MKEY_AUX 0x000a / String attributes may not always be represented in tl-data. kadmin clients * must use the get_strings and set_string RPCs. / #define KRB5_TL_STRING_ATTRS 0x000b #define KRB5_TL_PAC_LOGON_INFO 0x0100 / NDR encoded validation info / #define KRB5_TL_SERVER_REFERRAL 0x0200 / ASN.1 encoded ServerReferralInfo / #define KRB5_TL_SVR_REFERRAL_DATA 0x0300 / ASN.1 encoded PA-SVR-REFERRAL-DATA / #define KRB5_TL_CONSTRAINED_DELEGATION_ACL 0x0400 / Each entry is a permitted SPN / #define KRB5_TL_LM_KEY 0x0500 / LM OWF / #define KRB5_TL_X509_SUBJECT_ISSUER_NAME 0x0600 / <I>IssuerDN<S>SubjectDN / #define KRB5_TL_LAST_ADMIN_UNLOCK 0x0700 / Timestamp of admin unlock / #define KRB5_TL_DB_ARGS 0x7fff / version number for KRB5_TL_ACTKVNO data / #define KRB5_TL_ACTKVNO_VER 1 / version number for KRB5_TL_MKEY_AUX data / #define KRB5_TL_MKEY_AUX_VER 1 typedef struct _krb5_actkvno_node { struct _krb5_actkvno_node next; krb5_kvno act_kvno; krb5_timestamp act_time; } krb5_actkvno_node; typedef struct _krb5_mkey_aux_node { struct _krb5_mkey_aux_node next; krb5_kvno mkey_kvno; / kvno of mkey protecting the latest_mkey / krb5_key_data latest_mkey; / most recent mkey / } krb5_mkey_aux_node; typedef struct _krb5_keylist_node { krb5_keyblock keyblock; krb5_kvno kvno; struct _krb5_keylist_node next; } krb5_keylist_node; /* * Determines the number of failed KDC requests before DISALLOW_ALL_TIX is set * on the principal. / #define KRB5_MAX_FAIL_COUNT 5 / XXX depends on knowledge of krb5_parse_name() formats / #define KRB5_KDB_M_NAME "K/M" / Kerberos/Master / / prompts used by default when reading the KDC password from the keyboard. / #define KRB5_KDC_MKEY_1 "Enter KDC database master key" #define KRB5_KDC_MKEY_2 "Re-enter KDC database master key to verify" extern char krb5_mkey_pwd_prompt1; extern char krb5_mkey_pwd_prompt2; / * These macros specify the encoding of data within the database. * * Data encoding is little-endian. / #ifdef _KRB5_INT_H #include "k5-platform.h" #define krb5_kdb_decode_int16(cp, i16) \ ((krb5_int16 ) &(i16)) = load_16_le(cp) #define krb5_kdb_decode_int32(cp, i32) \ ((krb5_int32 ) &(i32)) = load_32_le(cp) #define krb5_kdb_encode_int16(i16, cp) store_16_le(i16, cp) #define krb5_kdb_encode_int32(i32, cp) store_32_le(i32, cp) #endif / _KRB5_INT_H / #define KRB5_KDB_OPEN_RW 0 #define KRB5_KDB_OPEN_RO 1 #ifndef KRB5_KDB_SRV_TYPE_KDC #define KRB5_KDB_SRV_TYPE_KDC 0x0100 #endif #ifndef KRB5_KDB_SRV_TYPE_ADMIN #define KRB5_KDB_SRV_TYPE_ADMIN 0x0200 #endif / 0x0300 was KRB5_KDB_SRV_TYPE_PASSWD but it is no longer used. / #ifndef KRB5_KDB_SRV_TYPE_OTHER #define KRB5_KDB_SRV_TYPE_OTHER 0x0400 #endif #define KRB5_KDB_OPT_SET_DB_NAME 0 #define KRB5_KDB_OPT_SET_LOCK_MODE 1 #define KRB5_DB_LOCKMODE_SHARED 0x0001 #define KRB5_DB_LOCKMODE_EXCLUSIVE 0x0002 #define KRB5_DB_LOCKMODE_PERMANENT 0x0008 / libkdb.spec / krb5_error_code krb5_db_setup_lib_handle(krb5_context kcontext); krb5_error_code krb5_db_open( krb5_context kcontext, char db_args, int mode ); krb5_error_code krb5_db_init ( krb5_context kcontext ); krb5_error_code krb5_db_create ( krb5_context kcontext, char db_args ); krb5_error_code krb5_db_inited ( krb5_context kcontext ); krb5_error_code kdb5_db_create ( krb5_context kcontext, char db_args ); krb5_error_code krb5_db_fini ( krb5_context kcontext ); const char krb5_db_errcode2string ( krb5_context kcontext, long err_code ); krb5_error_code krb5_db_destroy ( krb5_context kcontext, char db_args ); krb5_error_code krb5_db_promote ( krb5_context kcontext, char db_args ); krb5_error_code krb5_db_get_age ( krb5_context kcontext, char db_name, time_t t ); krb5_error_code krb5_db_lock ( krb5_context kcontext, int lock_mode ); krb5_error_code krb5_db_unlock ( krb5_context kcontext ); krb5_error_code krb5_db_get_principal ( krb5_context kcontext, krb5_const_principal search_for, unsigned int flags, krb5_db_entry *entry ); void krb5_db_free_principal ( krb5_context kcontext, krb5_db_entry entry ); krb5_error_code krb5_db_put_principal ( krb5_context kcontext, krb5_db_entry entry ); krb5_error_code krb5_db_delete_principal ( krb5_context kcontext, krb5_principal search_for ); krb5_error_code krb5_db_rename_principal ( krb5_context kcontext, krb5_principal source, krb5_principal target ); / * Iterate over principals in the KDB. If the callback may write to the DB, * the caller must get an exclusive lock with krb5_db_lock before iterating, * and release it with krb5_db_unlock after iterating. / krb5_error_code krb5_db_iterate ( krb5_context kcontext, char match_entry, int (func) (krb5_pointer, krb5_db_entry ), krb5_pointer func_arg, krb5_flags iterflags ); krb5_error_code krb5_db_store_master_key ( krb5_context kcontext, char keyfile, krb5_principal mname, krb5_kvno kvno, krb5_keyblock key, char master_pwd); krb5_error_code krb5_db_store_master_key_list ( krb5_context kcontext, char keyfile, krb5_principal mname, char master_pwd); krb5_error_code krb5_db_fetch_mkey ( krb5_context context, krb5_principal mname, krb5_enctype etype, krb5_boolean fromkeyboard, krb5_boolean twice, char db_args, krb5_kvno kvno, krb5_data salt, krb5_keyblock key); krb5_error_code krb5_db_fetch_mkey_list( krb5_context context, krb5_principal mname, const krb5_keyblock mkey ); krb5_error_code krb5_dbe_find_enctype( krb5_context kcontext, krb5_db_entry dbentp, krb5_int32 ktype, krb5_int32 stype, krb5_int32 kvno, krb5_key_data kdatap); krb5_error_code krb5_dbe_search_enctype ( krb5_context kcontext, krb5_db_entry dbentp, krb5_int32 start, krb5_int32 ktype, krb5_int32 stype, krb5_int32 kvno, krb5_key_data kdatap); krb5_error_code krb5_db_setup_mkey_name ( krb5_context context, const char keyname, const char realm, char fullname, krb5_principal principal); /** * Decrypts the key given in @@a key_data. If @a mkey is specified, that * master key is used. If @a mkey is NULL, then all master keys are tried. / krb5_error_code krb5_dbe_decrypt_key_data( krb5_context context, const krb5_keyblock mkey, const krb5_key_data * key_data, krb5_keyblock * dbkey, krb5_keysalt * keysalt); krb5_error_code krb5_dbe_encrypt_key_data( krb5_context context, const krb5_keyblock * mkey, const krb5_keyblock * dbkey, const krb5_keysalt * keysalt, int keyver, krb5_key_data * key_data); krb5_error_code krb5_dbe_fetch_act_key_list(krb5_context context, krb5_principal princ, krb5_actkvno_node *act_key_list); krb5_error_code krb5_dbe_find_act_mkey( krb5_context context, krb5_actkvno_node act_mkey_list, krb5_kvno * act_kvno, krb5_keyblock ** act_mkey); krb5_error_code krb5_dbe_find_mkey( krb5_context context, krb5_db_entry * entry, krb5_keyblock ** mkey); /* Set mkvno to mkvno in entry tl_data, or 0 if not present. / krb5_error_code krb5_dbe_lookup_mkvno( krb5_context context, krb5_db_entry * entry, krb5_kvno * mkvno); krb5_keylist_node * krb5_db_mkey_list_alias( krb5_context kcontext ); /* Set mkvno to mkvno in entry tl_data, or minimum value from mkey_list. / krb5_error_code krb5_dbe_get_mkvno( krb5_context context, krb5_db_entry * entry, krb5_kvno * mkvno); krb5_error_code krb5_dbe_lookup_mod_princ_data( krb5_context context, krb5_db_entry * entry, krb5_timestamp * mod_time, krb5_principal * mod_princ); krb5_error_code krb5_dbe_lookup_mkey_aux( krb5_context context, krb5_db_entry * entry, krb5_mkey_aux_node ** mkey_aux_data_list); krb5_error_code krb5_dbe_update_mkvno( krb5_context context, krb5_db_entry * entry, krb5_kvno mkvno); krb5_error_code krb5_dbe_lookup_actkvno( krb5_context context, krb5_db_entry * entry, krb5_actkvno_node ** actkvno_list); krb5_error_code krb5_dbe_update_mkey_aux( krb5_context context, krb5_db_entry * entry, krb5_mkey_aux_node * mkey_aux_data_list); krb5_error_code krb5_dbe_update_actkvno(krb5_context context, krb5_db_entry * entry, const krb5_actkvno_node actkvno_list); krb5_error_code krb5_dbe_update_last_pwd_change( krb5_context context, krb5_db_entry entry, krb5_timestamp stamp); krb5_error_code krb5_dbe_update_last_admin_unlock( krb5_context context, krb5_db_entry * entry, krb5_timestamp stamp); krb5_error_code krb5_dbe_lookup_tl_data( krb5_context context, krb5_db_entry * entry, krb5_tl_data * ret_tl_data); krb5_error_code krb5_dbe_create_key_data( krb5_context context, krb5_db_entry * entry); krb5_error_code krb5_dbe_update_mod_princ_data( krb5_context context, krb5_db_entry * entry, krb5_timestamp mod_date, krb5_const_principal mod_princ); /* * These are wrappers around realloc() and free(). Applications and KDB * modules can use them when manipulating principal and policy entries to * ensure that they allocate and free memory in a manner compatible with the * library. Using libkrb5 or libkbd5 functions to construct values (such as * krb5_copy_principal() to construct the princ field of a krb5_db_entry) is * also safe. On Unix platforms, just using malloc() and free() is safe as * long as the application or module does not use a malloc replacement. / void krb5_db_alloc( krb5_context kcontext, void ptr, size_t size ); void krb5_db_free( krb5_context kcontext, void ptr); krb5_error_code krb5_dbe_lookup_last_pwd_change( krb5_context context, krb5_db_entry * entry, krb5_timestamp * stamp); krb5_error_code krb5_dbe_lookup_last_admin_unlock( krb5_context context, krb5_db_entry * entry, krb5_timestamp * stamp); /* Retrieve the set of string attributes in entry, in no particular order. * Free strings_out with krb5_dbe_free_strings when done. / krb5_error_code krb5_dbe_get_strings(krb5_context context, krb5_db_entry entry, krb5_string_attr strings_out, int count_out); /* Retrieve a single string attribute from entry, or NULL if there is no * attribute for key. Free value_out with krb5_dbe_free_string when done. / krb5_error_code krb5_dbe_get_string(krb5_context context, krb5_db_entry entry, const char key, char *value_out); / Change or add a string attribute in entry, or delete it if value is NULL. / krb5_error_code krb5_dbe_set_string(krb5_context context, krb5_db_entry entry, const char key, const char value); krb5_error_code krb5_dbe_delete_tl_data( krb5_context context, krb5_db_entry * entry, krb5_int16 tl_data_type); krb5_error_code krb5_db_update_tl_data(krb5_context context, krb5_int16 * n_tl_datap, krb5_tl_data *tl_datap, krb5_tl_data new_tl_data); krb5_error_code krb5_dbe_update_tl_data( krb5_context context, krb5_db_entry * entry, krb5_tl_data * new_tl_data); /* Compute the salt for a key data entry given the corresponding principal. / krb5_error_code krb5_dbe_compute_salt(krb5_context context, const krb5_key_data key, krb5_const_principal princ, krb5_int16 salttype_out, krb5_data salt_out); / * Modify the key data of entry to explicitly store salt values using the * KRB5_KDB_SALTTYPE_SPECIAL salt type. / krb5_error_code krb5_dbe_specialize_salt(krb5_context context, krb5_db_entry entry); krb5_error_code krb5_dbe_cpw( krb5_context kcontext, krb5_keyblock * master_key, krb5_key_salt_tuple * ks_tuple, int ks_tuple_count, char * passwd, int new_kvno, krb5_boolean keepold, krb5_db_entry * db_entry); krb5_error_code krb5_dbe_ark( krb5_context context, krb5_keyblock * master_key, krb5_key_salt_tuple * ks_tuple, int ks_tuple_count, krb5_db_entry * db_entry); krb5_error_code krb5_dbe_crk( krb5_context context, krb5_keyblock * master_key, krb5_key_salt_tuple * ks_tuple, int ks_tuple_count, krb5_boolean keepold, krb5_db_entry * db_entry); krb5_error_code krb5_dbe_apw( krb5_context context, krb5_keyblock * master_key, krb5_key_salt_tuple * ks_tuple, int ks_tuple_count, char * passwd, krb5_db_entry * db_entry); int krb5_db_get_key_data_kvno( krb5_context context, int count, krb5_key_data * data); krb5_error_code krb5_db_sign_authdata(krb5_context kcontext, unsigned int flags, krb5_const_principal client_princ, krb5_const_principal server_princ, krb5_db_entry client, krb5_db_entry server, krb5_db_entry header_server, krb5_db_entry local_tgt, krb5_keyblock client_key, krb5_keyblock server_key, krb5_keyblock header_key, krb5_keyblock local_tgt_key, krb5_keyblock session_key, krb5_timestamp authtime, krb5_authdata tgt_auth_data, void ad_info, krb5_data *auth_indicators, krb5_authdata signed_auth_data); krb5_error_code krb5_db_check_transited_realms(krb5_context kcontext, const krb5_data tr_contents, const krb5_data client_realm, const krb5_data server_realm); krb5_error_code krb5_db_check_policy_as(krb5_context kcontext, krb5_kdc_req request, krb5_db_entry client, krb5_db_entry server, krb5_timestamp kdc_time, const char status, krb5_pa_data *e_data); krb5_error_code krb5_db_check_policy_tgs(krb5_context kcontext, krb5_kdc_req request, krb5_db_entry server, krb5_ticket ticket, const char status, krb5_pa_data e_data); void krb5_db_audit_as_req(krb5_context kcontext, krb5_kdc_req request, const krb5_address local_addr, const krb5_address remote_addr, krb5_db_entry client, krb5_db_entry server, krb5_timestamp authtime, krb5_error_code error_code); void krb5_db_refresh_config(krb5_context kcontext); krb5_error_code krb5_db_check_allowed_to_delegate(krb5_context kcontext, krb5_const_principal client, const krb5_db_entry server, krb5_const_principal proxy); krb5_error_code krb5_db_get_s4u_x509_principal(krb5_context kcontext, const krb5_data client_cert, krb5_const_principal in_princ, unsigned int flags, krb5_db_entry *entry); krb5_error_code krb5_db_allowed_to_delegate_from(krb5_context context, krb5_const_principal client, krb5_const_principal server, void server_ad_info, const krb5_db_entry proxy); krb5_error_code krb5_db_get_authdata_info(krb5_context context, unsigned int flags, krb5_authdata in_authdata, krb5_const_principal client_princ, krb5_const_principal server_princ, krb5_keyblock server_key, krb5_keyblock krbtgt_key, krb5_db_entry krbtgt, krb5_timestamp authtime, void *ad_info_out, krb5_principal client_out); void krb5_db_free_authdata_info(krb5_context context, void ad_info); /* * Sort an array of @a krb5_key_data keys in descending order by their kvno. * Key data order within a kvno is preserved. * * @param key_data * The @a krb5_key_data array to sort. This is sorted in place so the * array will be modified. * @param key_data_length * The length of @a key_data. / void krb5_dbe_sort_key_data(krb5_key_data key_data, size_t key_data_length); /* default functions. Should not be directly called / / * Default functions prototype / krb5_error_code krb5_dbe_def_search_enctype( krb5_context kcontext, krb5_db_entry dbentp, krb5_int32 start, krb5_int32 ktype, krb5_int32 stype, krb5_int32 kvno, krb5_key_data kdatap); krb5_error_code krb5_def_store_mkey_list( krb5_context context, char keyfile, krb5_principal mname, krb5_keylist_node keylist, char master_pwd); krb5_error_code krb5_db_def_fetch_mkey( krb5_context context, krb5_principal mname, krb5_keyblock key, krb5_kvno kvno, char db_args); krb5_error_code krb5_def_fetch_mkey_list( krb5_context context, krb5_principal mprinc, const krb5_keyblock mkey, krb5_keylist_node *mkeys_list); krb5_error_code krb5_dbe_def_cpw( krb5_context context, krb5_keyblock master_key, krb5_key_salt_tuple * ks_tuple, int ks_tuple_count, char * passwd, int new_kvno, krb5_boolean keepold, krb5_db_entry * db_entry); krb5_error_code krb5_dbe_def_decrypt_key_data( krb5_context context, const krb5_keyblock * mkey, const krb5_key_data * key_data, krb5_keyblock * dbkey, krb5_keysalt * keysalt); krb5_error_code krb5_dbe_def_encrypt_key_data( krb5_context context, const krb5_keyblock * mkey, const krb5_keyblock * dbkey, const krb5_keysalt * keysalt, int keyver, krb5_key_data * key_data); krb5_error_code krb5_db_def_rename_principal( krb5_context kcontext, krb5_const_principal source, krb5_const_principal target); krb5_error_code krb5_db_create_policy( krb5_context kcontext, osa_policy_ent_t policy); krb5_error_code krb5_db_get_policy ( krb5_context kcontext, char name, osa_policy_ent_t policy ); krb5_error_code krb5_db_put_policy( krb5_context kcontext, osa_policy_ent_t policy); krb5_error_code krb5_db_iter_policy( krb5_context kcontext, char match_entry, osa_adb_iter_policy_func func, void data); krb5_error_code krb5_db_delete_policy( krb5_context kcontext, char policy); void krb5_db_free_policy( krb5_context kcontext, osa_policy_ent_t policy); krb5_error_code krb5_db_set_context(krb5_context, void db_context); krb5_error_code krb5_db_get_context(krb5_context, void *db_context); void krb5_dbe_free_key_data_contents(krb5_context, krb5_key_data ); void krb5_dbe_free_key_list(krb5_context, krb5_keylist_node ); void krb5_dbe_free_actkvno_list(krb5_context, krb5_actkvno_node ); void krb5_dbe_free_mkey_aux_list(krb5_context, krb5_mkey_aux_node ); void krb5_dbe_free_tl_data(krb5_context, krb5_tl_data ); void krb5_dbe_free_strings(krb5_context, krb5_string_attr , int count); void krb5_dbe_free_string(krb5_context, char ); /* * Register the KDB keytab type, allowing "KDB:" to be used as a keytab name. * For this type to work, the context used for keytab operations must have an * associated database handle (via krb5_db_open()). / krb5_error_code krb5_db_register_keytab(krb5_context context); #define KRB5_KDB_DEF_FLAGS 0 #define KDB_MAX_DB_NAME 128 #define KDB_REALM_SECTION "realms" #define KDB_MODULE_POINTER "database_module" #define KDB_MODULE_DEF_SECTION "dbdefaults" #define KDB_MODULE_SECTION "dbmodules" #define KDB_LIB_POINTER "db_library" #define KDB_DATABASE_CONF_FILE DEFAULT_SECURE_PROFILE_PATH #define KDB_DATABASE_ENV_PROF KDC_PROFILE_ENV #define KRB5_KDB_OPEN_RW 0 #define KRB5_KDB_OPEN_RO 1 #define KRB5_KDB_OPT_SET_DB_NAME 0 #define KRB5_KDB_OPT_SET_LOCK_MODE 1 / * This number indicates the date of the last incompatible change to the DAL. * The maj_ver field of the module's vtable structure must match this version. / #define KRB5_KDB_DAL_MAJOR_VERSION 8 / * A krb5_context can hold one database object. Modules should use * krb5_db_set_context and krb5_db_get_context to store state associated with * the database object. * * Some module functions are mandatory for KDC operation; others are optional * or apply only to administrative operations. If a function is optional, a * module can leave the function pointer as NULL. Alternatively, modules can * return KRB5_PLUGIN_OP_NOTSUPP when asked to perform an inapplicable action. * * Some module functions have default implementations which will call back into * the vtable interface. Leave these functions as NULL to use the default * implementations. * * The documentation in these comments describes the DAL as it is currently * implemented and used, not as it should be. So if anything seems off, that * probably means the current state of things is off. * * Modules must allocate memory for principal entries, policy entries, and * other structures using an allocator compatible with malloc() as seen by * libkdb5 and libkrb5. Modules may link against libkdb5 and call * krb5_db_alloc() to be certain that the same malloc implementation is used. / typedef struct _kdb_vftabl { short int maj_ver; short int min_ver; / * Mandatory: Invoked after the module library is loaded, when the first DB * using the module is opened, across all contexts. / krb5_error_code (init_library)(void); /* * Mandatory: Invoked before the module library is unloaded, after the last * DB using the module is closed, across all contexts. / krb5_error_code (fini_library)(void); /* * Mandatory: Initialize a database object. Profile settings should be * read from conf_section inside KDB_MODULE_SECTION. db_args communicates * command-line arguments for module-specific flags. mode will be one of * KRB5_KDB_OPEN_{RW,RO} or'd with one of * KRB5_KDB_SRV_TYPE_{KDC,ADMIN,PASSWD,OTHER}. / krb5_error_code (init_module)(krb5_context kcontext, char conf_section, char db_args, int mode); / * Mandatory: Finalize the database object contained in a context. Free * any state contained in the db_context pointer and null it out. / krb5_error_code (fini_module)(krb5_context kcontext); /* * Optional: Initialize a database object while creating the underlying * database. conf_section and db_args have the same meaning as in * init_module. This function may return an error if the database already * exists. Used by kdb5_util create. * * If db_args contains the value "temporary", the module should create an * exclusively locked side copy of the database suitable for loading in a * propagation from master to replica. This side copy will later be * promoted with promote_db, allowing complete updates of the DB with no * loss in read availability. If the module cannot comply with this * architecture, it should return an error. / krb5_error_code (create)(krb5_context kcontext, char conf_section, char db_args); / * Optional: Destroy a database. conf_section and db_args have the same * meaning as in init_module. Used by kdb5_util destroy. In current * usage, the database is destroyed while open, so the module should handle * that. / krb5_error_code (destroy)(krb5_context kcontext, char conf_section, char db_args); / * Deprecated: No longer used as of krb5 1.10; can be removed in the next * DAL revision. Modules should leave as NULL. / krb5_error_code (get_age)(krb5_context kcontext, char db_name, time_t age); /* * Optional: Lock the database, with semantics depending on the mode * argument: * * KRB5_DB_LOCKMODE_SHARED: Lock may coexist with other shared locks. * KRB5_DB_LOCKMODE_EXCLUSIVE: Lock may not coexist with other locks. * KRB5_DB_LOCKMODE_PERMANENT: Exclusive lock surviving process exit. * * Used by the "kadmin lock" command, incremental propagation, and * kdb5_util dump. Incremental propagation support requires shared locks * to operate. kdb5_util dump will continue unlocked if the module returns * KRB5_PLUGIN_OP_NOTSUPP. / krb5_error_code (lock)(krb5_context kcontext, int mode); /* Optional: Release a lock created with db_lock. / krb5_error_code (unlock)(krb5_context kcontext); /* * Mandatory: Set entry to an allocated entry for the principal search_for. If the principal is not found, return KRB5_KDB_NOENTRY. * * The meaning of flags are as follows: * * KRB5_KDB_FLAG_CANONICALIZE: Set by the KDC when looking up entries for * an AS or TGS request with canonicalization requested. Determines * whether the module should return out-of-realm referrals. * * KRB5_KDB_FLAG_INCLUDE_PAC: Set by the KDC during an AS request when the * client requested PAC information during padata, and during most TGS * requests. Indicates that the module should include PAC information * when its sign_authdata method is invoked. * * KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY: Set by the KDC when looking up the * client entry in an AS request. Affects how the module should return * out-of-realm referrals. * * KRB5_KDB_FLAG_MAP_PRINCIPALS: Set by the KDC when looking up the client * entry during TGS requests, except for S4U TGS requests and requests * where the server entry has the KRB5_KDB_NO_AUTH_DATA_REQUIRED * attribute. Indicates that the module should map foreign principals * to local principals if it supports doing so. * * KRB5_KDB_FLAG_PROTOCOL_TRANSITION: Set by the KDC when looking up the * client entry during an S4U2Self TGS request. This affects the PAC * information which should be included when authorization data is * generated; see the Microsoft S4U specification for details. * * KRB5_KDB_FLAG_CONSTRAINED_DELEGATION: Set by the KDC when looking up the * client entry during an S4U2Proxy TGS request. Also affects PAC * generation. * * KRB5_KDB_FLAG_CROSS_REALM: Set by the KDC after looking up a server * entry during a TGS request, if the header ticket was issued by a * different realm. * * KRB5_KDB_FLAG_ISSUING_REFERRAL: Set by the KDC after looking up a server * entry during a TGS request, if the requested server principal is not * part of the realm being served, and a referral or alternate TGT will * be issued instead. * * A module may return an in-realm alias by setting (entry)->princ to the canonical name. The KDC will decide based on the request whether to use * the requested name or the canonical name in the issued ticket. * * A module can return a referral to another realm if * KRB5_KDB_FLAG_CANONICALIZE is set, or if * KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY is set and search_for->type is * KRB5_NT_ENTERPRISE_PRINCIPAL. If KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY is * set, the module should return a referral by simply filling in an * out-of-realm name in (entry)->princ and setting all other fields to NULL. Otherwise, the module should return the entry for the cross-realm * TGS of the referred-to realm. For TGS referals, the module can also * include tl-data of type KRB5_TL_SERVER_REFERRAL containing ASN.1-encoded * Windows referral data as documented in * draft-ietf-krb-wg-kerberos-referrals-11 appendix A; this will be * returned to the client as encrypted padata. / krb5_error_code (get_principal)(krb5_context kcontext, krb5_const_principal search_for, unsigned int flags, krb5_db_entry *entry); / * Optional: Create or modify a principal entry. db_args communicates * command-line arguments for module-specific flags. * * The mask field of an entry indicates the changed fields. Mask values * are defined in kadmin's admin.h header. If KADM5_PRINCIPAL is set in * the mask, the entry is new; otherwise it already exists. All fields of * an entry are expected to contain correct values, regardless of whether * they are specified in the mask, so it is acceptable for a module to * ignore the mask and update the entire entry. / krb5_error_code (put_principal)(krb5_context kcontext, krb5_db_entry entry, char db_args); / * Optional: Delete the entry for the principal search_for. If the * principal did not exist, return KRB5_KDB_NOENTRY. / krb5_error_code (delete_principal)(krb5_context kcontext, krb5_const_principal search_for); /* * Optional with default: Rename a principal. If the source principal does * not exist, return KRB5_KDB_NOENTRY. If the target exists, return an * error. * * NOTE: If the module chooses to implement a custom function for renaming * a principal instead of using the default, then rename operations will * fail if iprop logging is enabled. / krb5_error_code (rename_principal)(krb5_context kcontext, krb5_const_principal source, krb5_const_principal target); /* * Optional: For each principal entry in the database, invoke func with the * argments func_arg and the entry data. If match_entry is specified, the * module may narrow the iteration to principal names matching that regular * expression; a module may alternatively ignore match_entry. / krb5_error_code (iterate)(krb5_context kcontext, char match_entry, int (func)(krb5_pointer, krb5_db_entry ), krb5_pointer func_arg, krb5_flags iterflags); / * Optional: Create a password policy entry. Return an error if the policy * already exists. / krb5_error_code (create_policy)(krb5_context kcontext, osa_policy_ent_t policy); /* * Optional: Set policy to the policy entry of the specified name. If the entry does not exist, return KRB5_KDB_NOENTRY. / krb5_error_code (get_policy)(krb5_context kcontext, char name, osa_policy_ent_t policy); /* * Optional: Modify an existing password policy entry to match the values * in policy. Return an error if the policy does not already exist. / krb5_error_code (put_policy)(krb5_context kcontext, osa_policy_ent_t policy); /* * Optional: For each password policy entry in the database, invoke func * with the argments data and the entry data. If match_entry is specified, * the module may narrow the iteration to policy names matching that * regular expression; a module may alternatively ignore match_entry. / krb5_error_code (iter_policy)(krb5_context kcontext, char match_entry, osa_adb_iter_policy_func func, void data); /* * Optional: Delete the password policy entry with the name policy. Return * an error if the entry does not exist. / krb5_error_code (delete_policy)(krb5_context kcontext, char policy); / * Optional with default: Retrieve a master keyblock from the stash file * db_args, filling in key and kvno. mname is the name of the master * principal for the realm. * * The default implementation reads the master keyblock from a keytab or * old-format stash file. / krb5_error_code (fetch_master_key)(krb5_context kcontext, krb5_principal mname, krb5_keyblock key, krb5_kvno kvno, char db_args); / * Optional with default: Given a keyblock for some version of the * database's master key, fetch the decrypted master key values from the * database and store the list into mkeys_list. The caller will free mkeys_list using a libkdb5 function which uses the standard free() function, so the module must not use a custom allocator. * * The caller may not know the version number of the master key it has, in * which case it will pass IGNORE_VNO. * * The default implementation ignores kvno and tries the key against the * current master key data and all KRB5_TL_MKEY_AUX values, which contain * copies of the master keys encrypted with old master keys. / krb5_error_code (fetch_master_key_list)(krb5_context kcontext, krb5_principal mname, const krb5_keyblock key, krb5_keylist_node mkeys_list); / * Optional with default: Save a list of master keyblocks, obtained from * fetch_master_key_list, into the stash file db_arg. The caller will set * master_pwd to NULL, so the module should just ignore it. mname is the * name of the master principal for the realm. * * The default implementation saves the list of master keys in a * keytab-format file. / krb5_error_code (store_master_key_list)(krb5_context kcontext, char db_arg, krb5_principal mname, krb5_keylist_node keylist, char master_pwd); / * Optional with default: Starting at position start, scan the key data of a database entry for a key matching the enctype ktype, the salt type * stype, and the version kvno. Store the resulting key into kdatap and set start to the position after the key found. If ktype is negative, match any enctype. If stype is negative, match any salt type. If kvno * is zero or negative, find the most recent key version satisfying the * other constraints. / krb5_error_code (dbe_search_enctype)(krb5_context kcontext, krb5_db_entry dbentp, krb5_int32 start, krb5_int32 ktype, krb5_int32 stype, krb5_int32 kvno, krb5_key_data *kdatap); / * Optional with default: Change the key data for db_entry to include keys * derived from the password passwd in each of the specified key-salt * types, at version new_kvno. Discard the old key data if keepold is not * set. * * The default implementation uses the keyblock master_key to encrypt each * new key, via the function encrypt_key_data. / krb5_error_code (change_pwd)(krb5_context context, krb5_keyblock master_key, krb5_key_salt_tuple ks_tuple, int ks_tuple_count, char passwd, int new_kvno, krb5_boolean keepold, krb5_db_entry db_entry); /* * Optional: Promote a temporary database to be the live one. context must * be initialized with an exclusively locked database created with the * "temporary" db_arg. On success, the database object contained in * context will be finalized. * * This method is used by kdb5_util load to replace the live database with * minimal loss of read availability. / krb5_error_code (promote_db)(krb5_context context, char conf_section, char db_args); / * Optional with default: Decrypt the key in key_data with master keyblock * mkey, placing the result into dbkey. Copy the salt from key_data, if * any, into keysalt. Either dbkey or keysalt may be left unmodified on * successful return if key_data does not contain key or salt information. * * The default implementation expects the encrypted key (in krb5_c_encrypt * format) to be stored in key_data_contents[0], with length given by * key_data_length[0]. If key_data_ver is 2, it expects the salt to be * stored, unencrypted, in key_data_contents[1], with length given by * key_data_length[1]. / krb5_error_code (decrypt_key_data)(krb5_context kcontext, const krb5_keyblock mkey, const krb5_key_data key_data, krb5_keyblock dbkey, krb5_keysalt keysalt); /* * Optional with default: Encrypt dbkey with master keyblock mkey, placing * the result into key_data along with keysalt. * * The default implementation stores the encrypted key (in krb5_c_encrypt * format) in key_data_contents[0] and the length in key_data_length[0]. * If keysalt is specified, it sets key_data_ver to 2, and stores the salt * in key_data_contents[1] and its length in key_data_length[1]. If * keysalt is not specified, key_data_ver is set to 1. / krb5_error_code (encrypt_key_data)(krb5_context kcontext, const krb5_keyblock mkey, const krb5_keyblock dbkey, const krb5_keysalt keysalt, int keyver, krb5_key_data key_data); /* * Optional: Generate signed authorization data, such as a Windows PAC, for * the ticket to be returned to the client. Place the signed authorization * data, if any, in signed_auth_data. This function will be invoked for an AS request if the client included padata requesting a PAC. This * function will be invoked for a TGS request if there is authorization * data in the TGT, if the client is from another realm, or if the TGS * request is an S4U2Self or S4U2Proxy request. This function will not be * invoked during TGS requests if the server principal has the * no_auth_data_required attribute set. Input parameters are: * * flags: The flags used to look up the client principal. * * client_princ: For S4U2Self and S4U2Proxy TGS requests, the client * principal requested by the service; for regular TGS requests, the * possibly-canonicalized client principal. * * server_princ: The server principal in the request. * * client: The DB entry of the client if it is in the local realm, NULL * if not. For S4U2Self and S4U2Proxy TGS requests, this is the DB * entry for the client principal requested by the service. * * server: The DB entry of the service principal, or of a cross-realm * krbtgt principal in case of referral. * * header_server: For S4U2Proxy requests, the DB entry of the second * ticket server. For other TGS requests, the DB entry of the header * ticket server. For AS requests, NULL. * * local_tgt: the DB entry of the local krbtgt principal. * * client_key: The reply key for the KDC request, before any FAST armor * is applied. For AS requests, this may be the client's long-term key * or a key chosen by a preauth mechanism. For TGS requests, this may * be the subkey found in the AP-REQ or the session key of the TGT. * * server_key: The server key used to encrypt the returned ticket. * * header_key: For S4U2Proxy requests, the key used to decrypt the second * ticket. For TGS requests, the key used to decrypt the header * ticket. For AS requests, NULL. * * local_tgt_key: The decrypted first key of local_tgt. * * session_key: The session key of the ticket being granted to the * requestor. * * authtime: The timestamp of the original client authentication time. * For AS requests, this is the current time. For TGS requests, this * is the authtime of the subject ticket (TGT or S4U2Proxy evidence * ticket). * * tgt_auth_data: For TGS requests, the authorization data present in the * subject ticket. For AS requests, NULL. * * ad_info: For TGS requests, the parsed authorization data if obtained * by get_authdata_info method from the authorization data present in * the subject ticket. Otherwise NULL. * * auth_indicators: Points to NULL or a null-terminated list of krb5_data * pointers, each containing an authentication indicator (RFC 8129). * The method may modify this list, or free it and replace * auth_indicators with NULL, to change which auth indicators will be included in the ticket. / krb5_error_code (sign_authdata)(krb5_context kcontext, unsigned int flags, krb5_const_principal client_princ, krb5_const_principal server_princ, krb5_db_entry client, krb5_db_entry server, krb5_db_entry header_server, krb5_db_entry local_tgt, krb5_keyblock client_key, krb5_keyblock server_key, krb5_keyblock header_key, krb5_keyblock local_tgt_key, krb5_keyblock session_key, krb5_timestamp authtime, krb5_authdata tgt_auth_data, void ad_info, krb5_data *auth_indicators, krb5_authdata signed_auth_data); / * Optional: Perform a policy check on a cross-realm ticket's transited * field. Return 0 if the check authoritatively succeeds, * KRB5_PLUGIN_NO_HANDLE to use the core transited-checking mechanisms, or * another error (other than KRB5_PLUGIN_OP_NOTSUPP) if the check fails. / krb5_error_code (check_transited_realms)(krb5_context kcontext, const krb5_data tr_contents, const krb5_data client_realm, const krb5_data server_realm); / * Optional: Perform a policy check on an AS request, in addition to the * standard policy checks. Return 0 if the AS request is allowed. If the * AS request is not allowed: * - Place a short string literal into status. - If desired, place data into e_data. Any data placed here will be * freed by the caller using the standard free function. * - Return an appropriate error (such as KRB5KDC_ERR_POLICY). / krb5_error_code (check_policy_as)(krb5_context kcontext, krb5_kdc_req request, krb5_db_entry client, krb5_db_entry server, krb5_timestamp kdc_time, const char status, krb5_pa_data *e_data); / * Optional: Perform a policy check on a TGS request, in addition to the * standard policy checks. Return 0 if the TGS request is allowed. If the * TGS request is not allowed: * - Place a short string literal into status. - If desired, place data into e_data. Any data placed here will be * freed by the caller using the standard free function. * - Return an appropriate error (such as KRB5KDC_ERR_POLICY). * The input parameter ticket contains the TGT used in the TGS request. / krb5_error_code (check_policy_tgs)(krb5_context kcontext, krb5_kdc_req request, krb5_db_entry server, krb5_ticket ticket, const char status, krb5_pa_data *e_data); / * Optional: This method informs the module of a successful or unsuccessful * AS request. / void (audit_as_req)(krb5_context kcontext, krb5_kdc_req request, const krb5_address local_addr, const krb5_address remote_addr, krb5_db_entry client, krb5_db_entry server, krb5_timestamp authtime, krb5_error_code error_code); / Note: there is currently no method for auditing TGS requests. / / * Optional: This method informs the module of a request to reload * configuration or other state (that is, the KDC received a SIGHUP). / void (refresh_config)(krb5_context kcontext); /* * Optional: Perform a policy check on server being allowed to obtain * tickets from client to proxy. (Note that proxy is the target of the * delegation, not the delegating service; the term "proxy" is from the * viewpoint of the delegating service asking another service to perform * some of its work in the authentication context of the client. This * terminology comes from the Microsoft S4U protocol documentation.) * Return 0 if policy allows it, or an appropriate error (such as * KRB5KDC_ERR_POLICY) if not. If this method is not implemented, all * S4U2Proxy delegation requests will be rejected. / krb5_error_code (check_allowed_to_delegate)(krb5_context context, krb5_const_principal client, const krb5_db_entry server, krb5_const_principal proxy); / * Optional: Free the e_data pointer of a database entry. If this method * is not implemented, the e_data pointer in principal entries will be * freed with free() as seen by libkdb5. / void (free_principal_e_data)(krb5_context kcontext, krb5_octet e_data); / * Optional: get a principal entry for S4U2Self based on X509 certificate. * * If flags include KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY, princ->realm * indicates the request realm, but the data components should be ignored. * The module can return an out-of-realm client referral as it would for * get_principal(). * * If flags does not include KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY, princ is * from PA-S4U-X509-USER. If it contains data components (and not just a * realm), the module should verify that it is the same as the lookup * result for client_cert. The module should not return a referral. / krb5_error_code (get_s4u_x509_principal)(krb5_context kcontext, const krb5_data client_cert, krb5_const_principal princ, unsigned int flags, krb5_db_entry entry_out); / * Optional: Perform a policy check on server being allowed to obtain * tickets from client to proxy. This method is similar to * check_allowed_to_delegate, but it operates on the target server DB entry * (called "proxy" here as in Microsoft's protocol documentation) rather * than the intermediate server entry. server_ad_info represents the * authdata of the intermediate server, as returned by the * get_authdata_info method on the header ticket. Return 0 if policy * allows the delegation, or an appropriate error (such as * KRB5KDC_ERR_POLICY) if not. * * This method is called for S4U2Proxy requests and implements the * resource-based constrained delegation variant, which can support * cross-realm delegation. If this method is not implemented or if it * returns a policy error, the KDC will fall back to * check_allowed_to_delegate if the intermediate and target servers are in * the same realm and the evidence ticket is forwardable. / krb5_error_code (allowed_to_delegate_from)(krb5_context context, krb5_const_principal client, krb5_const_principal server, void server_ad_info, const krb5_db_entry proxy); /* * Optional: Perform verification and policy checks on authorization data, * such as a Windows PAC, based on the request client lookup flags. Return * 0 if all checks have passed. Optionally return a representation of the * authdata in ad_info_out, to be consumed by allowed_to_delegate_from and sign_authdata. Returning ad_info_out is required to support resource-based constrained delegation. * * If the KRB5_KDB_FLAG_CONSTRAINED_DELEGATION bit is set, a PAC must be * provided and verified, and an error should be returned if the client is * not allowed to delegate. If the KRB5_KDB_FLAG_CROSS_REALM bit is also * set, set client_out to the client name in the PAC; this indicates the requested client principal for a cross-realm S4U2Proxy request. * * This method is called for TGS requests on the authorization data from * the header ticket. For S4U2Proxy requests it is also called on the * authorization data from the evidence ticket. If the * KRB5_KDB_FLAG_PROTOCOL_TRANSITION bit is set in flags, the authdata is * from the header ticket of an S4U2Self referral request, and the supplied * client_princ is the requested client. / krb5_error_code (get_authdata_info)(krb5_context context, unsigned int flags, krb5_authdata *in_authdata, krb5_const_principal client_princ, krb5_const_principal server_princ, krb5_keyblock server_key, krb5_keyblock krbtgt_key, krb5_db_entry krbtgt, krb5_timestamp authtime, void *ad_info_out, krb5_principal client_out); void (free_authdata_info)(krb5_context context, void ad_info); /* End of minor version 0 for major version 8. / } kdb_vftabl; #endif / !defined(_WIN32) / #endif / KRB5_KDB5__ */ Back

Edit File : kdb.h | Size : 67.66 KB

/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 * Copyright 1990, 1991, 2016 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 */
/*
 * Copyright (C) 1998 by the FundsXpress, INC.
 *
 * All rights reserved.
 *
 * Export of this software from the United States of America may require
 * a specific license from the United States Government.  It is the
 * responsibility of any person or organization contemplating export to
 * obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of FundsXpress. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  FundsXpress makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/* KDC Database interface definitions */

/* This API is not considered as stable as the main krb5 API.
 *
 * - We may make arbitrary incompatible changes between feature
 *   releases (e.g. from 1.7 to 1.8).
 * - We will make some effort to avoid making incompatible changes for
 *   bugfix releases, but will make them if necessary.
 */

#ifndef KRB5_KDB5__
#define KRB5_KDB5__

#include <krb5.h>

/* This version will be incremented when incompatible changes are made to the
 * KDB API, and will be kept in sync with the libkdb major version. */
#define KRB5_KDB_API_VERSION 10

/* Salt types */
#define KRB5_KDB_SALTTYPE_NORMAL        0
/* #define KRB5_KDB_SALTTYPE_V4            1 */
#define KRB5_KDB_SALTTYPE_NOREALM       2
#define KRB5_KDB_SALTTYPE_ONLYREALM     3
#define KRB5_KDB_SALTTYPE_SPECIAL       4
/* #define KRB5_KDB_SALTTYPE_AFS3          5 */
#define KRB5_KDB_SALTTYPE_CERTHASH      6

/* Attributes */
#define KRB5_KDB_DISALLOW_POSTDATED     0x00000001
#define KRB5_KDB_DISALLOW_FORWARDABLE   0x00000002
#define KRB5_KDB_DISALLOW_TGT_BASED     0x00000004
#define KRB5_KDB_DISALLOW_RENEWABLE     0x00000008
#define KRB5_KDB_DISALLOW_PROXIABLE     0x00000010
#define KRB5_KDB_DISALLOW_DUP_SKEY      0x00000020
#define KRB5_KDB_DISALLOW_ALL_TIX       0x00000040
#define KRB5_KDB_REQUIRES_PRE_AUTH      0x00000080
#define KRB5_KDB_REQUIRES_HW_AUTH       0x00000100
#define KRB5_KDB_REQUIRES_PWCHANGE      0x00000200
#define KRB5_KDB_DISALLOW_SVR           0x00001000
#define KRB5_KDB_PWCHANGE_SERVICE       0x00002000
#define KRB5_KDB_SUPPORT_DESMD5         0x00004000
#define KRB5_KDB_NEW_PRINC              0x00008000
#define KRB5_KDB_OK_AS_DELEGATE         0x00100000
#define KRB5_KDB_OK_TO_AUTH_AS_DELEGATE 0x00200000 /* S4U2Self OK */
#define KRB5_KDB_NO_AUTH_DATA_REQUIRED  0x00400000
#define KRB5_KDB_LOCKDOWN_KEYS          0x00800000

/* Creation flags */
#define KRB5_KDB_CREATE_BTREE           0x00000001
#define KRB5_KDB_CREATE_HASH            0x00000002

/* Entry get flags */
/* Name canonicalization requested */
#define KRB5_KDB_FLAG_CANONICALIZE              0x00000010
/* Include authorization data generated by backend */
#define KRB5_KDB_FLAG_INCLUDE_PAC               0x00000020
/* Is AS-REQ (client referrals only) */
#define KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY     0x00000040
/* Map cross-realm principals */
#define KRB5_KDB_FLAG_MAP_PRINCIPALS            0x00000080
/* Protocol transition */
#define KRB5_KDB_FLAG_PROTOCOL_TRANSITION       0x00000100
/* Constrained delegation */
#define KRB5_KDB_FLAG_CONSTRAINED_DELEGATION    0x00000200
/* User-to-user */
#define KRB5_KDB_FLAG_USER_TO_USER              0x00000800
/* Cross-realm */
#define KRB5_KDB_FLAG_CROSS_REALM               0x00001000
/* Issuing referral */
#define KRB5_KDB_FLAG_ISSUING_REFERRAL          0x00004000

#define KRB5_KDB_FLAGS_S4U                      ( KRB5_KDB_FLAG_PROTOCOL_TRANSITION | \
                                                  KRB5_KDB_FLAG_CONSTRAINED_DELEGATION )

/* KDB iteration flags */
#define KRB5_DB_ITER_WRITE      0x00000001
#define KRB5_DB_ITER_REV        0x00000002
#define KRB5_DB_ITER_RECURSE    0x00000004

/* String attribute names recognized by krb5 */
#define KRB5_KDB_SK_SESSION_ENCTYPES            "session_enctypes"
#define KRB5_KDB_SK_REQUIRE_AUTH                "require_auth"
#define KRB5_KDB_SK_OPTIONAL_AD_SIGNEDPATH      "optional_ad_signedpath"

#if !defined(_WIN32)

/*
 * Note --- these structures cannot be modified without changing the
 * database version number in libkdb.a, but should be expandable by
 * adding new tl_data types.
 */
typedef struct _krb5_tl_data {
    struct _krb5_tl_data* tl_data_next;         /* NOT saved */
    krb5_int16            tl_data_type;
    krb5_ui_2             tl_data_length;
    krb5_octet          * tl_data_contents;
} krb5_tl_data;

/* String attributes (currently stored inside tl-data) map C string keys to
 * values.  They can be set via kadmin and consumed by KDC plugins. */
typedef struct krb5_string_attr_st {
    char *key;
    char *value;
} krb5_string_attr;

/*
 * If this ever changes up the version number and make the arrays be as
 * big as necessary.
 *
 * Currently the first type is the enctype and the second is the salt type.
 */
typedef struct _krb5_key_data {
    krb5_int16            key_data_ver;         /* Version */
    krb5_ui_2             key_data_kvno;        /* Key Version */
    krb5_int16            key_data_type[2];     /* Array of types */
    krb5_ui_2             key_data_length[2];   /* Array of lengths */
    krb5_octet          * key_data_contents[2]; /* Array of pointers */
} krb5_key_data;

#define KRB5_KDB_V1_KEY_DATA_ARRAY      2       /* # of array elements */

typedef struct _krb5_keysalt {
    krb5_int16            type;
    krb5_data             data;                 /* Length, data */
} krb5_keysalt;

/*
 * A principal database entry.  Extensions to this structure currently use the
 * tl_data list.  The e_data and e_length fields are not used by any calling
 * code except kdb5_util dump and load, which marshal and unmarshal the array
 * in the dump record.  KDB modules may use these fields internally as long as
 * they set e_length appropriately (non-zero if the data should be marshalled
 * across dump and load, zero if not) and handle null e_data values in
 * caller-constructed principal entries.
 */
typedef struct _krb5_db_entry_new {
    krb5_magic            magic;                /* NOT saved */
    krb5_ui_2             len;
    krb5_ui_4             mask;                 /* members currently changed/set */
    krb5_flags            attributes;
    krb5_deltat           max_life;
    krb5_deltat           max_renewable_life;
    krb5_timestamp        expiration;           /* When the client expires */
    krb5_timestamp        pw_expiration;        /* When its passwd expires */
    krb5_timestamp        last_success;         /* Last successful passwd */
    krb5_timestamp        last_failed;          /* Last failed passwd attempt */
    krb5_kvno             fail_auth_count;      /* # of failed passwd attempt */
    krb5_int16            n_tl_data;
    krb5_int16            n_key_data;
    krb5_ui_2             e_length;             /* Length of extra data */
    krb5_octet          * e_data;               /* Extra data to be saved */

krb5_principal        princ;                /* Length, data */
    krb5_tl_data        * tl_data;              /* Linked list */

/* key_data must be sorted by kvno in descending order. */
    krb5_key_data       * key_data;             /* Array */
} krb5_db_entry;

typedef struct _osa_policy_ent_t {
    int               version;
    char      *name;
    krb5_ui_4       pw_min_life;
    krb5_ui_4       pw_max_life;
    krb5_ui_4       pw_min_length;
    krb5_ui_4       pw_min_classes;
    krb5_ui_4       pw_history_num;
    krb5_ui_4       policy_refcnt;              /* no longer used */
    /* Only valid if version > 1 */
    krb5_ui_4       pw_max_fail;                /* pwdMaxFailure */
    krb5_ui_4       pw_failcnt_interval;        /* pwdFailureCountInterval */
    krb5_ui_4       pw_lockout_duration;        /* pwdLockoutDuration */
    /* Only valid if version > 2 */
    krb5_ui_4       attributes;
    krb5_ui_4       max_life;
    krb5_ui_4       max_renewable_life;
    char          * allowed_keysalts;
    krb5_int16      n_tl_data;
    krb5_tl_data  * tl_data;
} osa_policy_ent_rec, *osa_policy_ent_t;

typedef       void    (*osa_adb_iter_policy_func) (void *, osa_policy_ent_t);

typedef struct __krb5_key_salt_tuple {
    krb5_enctype        ks_enctype;
    krb5_int32          ks_salttype;
} krb5_key_salt_tuple;

#define KRB5_KDB_MAGIC_NUMBER           0xdbdbdbdb
#define KRB5_KDB_V1_BASE_LENGTH         38

#define KRB5_KDB_MAX_ALLOWED_KS_LEN     512

#define KRB5_TL_LAST_PWD_CHANGE         0x0001
#define KRB5_TL_MOD_PRINC               0x0002
#define KRB5_TL_KADM_DATA               0x0003
#define KRB5_TL_KADM5_E_DATA            0x0004
#define KRB5_TL_RB1_CHALLENGE           0x0005
#ifdef SECURID
#define KRB5_TL_SECURID_STATE           0x0006
#endif /* SECURID */
#define KRB5_TL_USER_CERTIFICATE        0x0007
#define KRB5_TL_MKVNO                   0x0008
#define KRB5_TL_ACTKVNO                 0x0009
#define KRB5_TL_MKEY_AUX                0x000a

/* String attributes may not always be represented in tl-data.  kadmin clients
 * must use the get_strings and set_string RPCs. */
#define KRB5_TL_STRING_ATTRS            0x000b

#define KRB5_TL_PAC_LOGON_INFO          0x0100 /* NDR encoded validation info */
#define KRB5_TL_SERVER_REFERRAL         0x0200 /* ASN.1 encoded ServerReferralInfo */
#define KRB5_TL_SVR_REFERRAL_DATA       0x0300 /* ASN.1 encoded PA-SVR-REFERRAL-DATA */
#define KRB5_TL_CONSTRAINED_DELEGATION_ACL 0x0400 /* Each entry is a permitted SPN */
#define KRB5_TL_LM_KEY                  0x0500 /* LM OWF */
#define KRB5_TL_X509_SUBJECT_ISSUER_NAME 0x0600 /* <I>IssuerDN<S>SubjectDN */
#define KRB5_TL_LAST_ADMIN_UNLOCK       0x0700 /* Timestamp of admin unlock */

#define KRB5_TL_DB_ARGS                 0x7fff

/* version number for KRB5_TL_ACTKVNO data */
#define KRB5_TL_ACTKVNO_VER     1

/* version number for KRB5_TL_MKEY_AUX data */
#define KRB5_TL_MKEY_AUX_VER    1

typedef struct _krb5_actkvno_node {
    struct _krb5_actkvno_node *next;
    krb5_kvno      act_kvno;
    krb5_timestamp act_time;
} krb5_actkvno_node;

typedef struct _krb5_mkey_aux_node {
    struct _krb5_mkey_aux_node *next;
    krb5_kvno        mkey_kvno; /* kvno of mkey protecting the latest_mkey */
    krb5_key_data    latest_mkey; /* most recent mkey */
} krb5_mkey_aux_node;

typedef struct _krb5_keylist_node {
    krb5_keyblock keyblock;
    krb5_kvno     kvno;
    struct _krb5_keylist_node *next;
} krb5_keylist_node;

/*
 * Determines the number of failed KDC requests before DISALLOW_ALL_TIX is set
 * on the principal.
 */
#define KRB5_MAX_FAIL_COUNT             5

/* XXX depends on knowledge of krb5_parse_name() formats */
#define KRB5_KDB_M_NAME         "K/M"   /* Kerberos/Master */

/* prompts used by default when reading the KDC password from the keyboard. */
#define KRB5_KDC_MKEY_1 "Enter KDC database master key"
#define KRB5_KDC_MKEY_2 "Re-enter KDC database master key to verify"

extern char *krb5_mkey_pwd_prompt1;
extern char *krb5_mkey_pwd_prompt2;

/*
 * These macros specify the encoding of data within the database.
 *
 * Data encoding is little-endian.
 */
#ifdef _KRB5_INT_H
#include "k5-platform.h"
#define krb5_kdb_decode_int16(cp, i16)          \
    *((krb5_int16 *) &(i16)) = load_16_le(cp)
#define krb5_kdb_decode_int32(cp, i32)          \
    *((krb5_int32 *) &(i32)) = load_32_le(cp)
#define krb5_kdb_encode_int16(i16, cp)  store_16_le(i16, cp)
#define krb5_kdb_encode_int32(i32, cp)  store_32_le(i32, cp)
#endif /* _KRB5_INT_H */

#define KRB5_KDB_OPEN_RW                0
#define KRB5_KDB_OPEN_RO                1

#ifndef KRB5_KDB_SRV_TYPE_KDC
#define KRB5_KDB_SRV_TYPE_KDC           0x0100
#endif

#ifndef KRB5_KDB_SRV_TYPE_ADMIN
#define KRB5_KDB_SRV_TYPE_ADMIN         0x0200
#endif

/* 0x0300 was KRB5_KDB_SRV_TYPE_PASSWD but it is no longer used. */

#ifndef KRB5_KDB_SRV_TYPE_OTHER
#define KRB5_KDB_SRV_TYPE_OTHER         0x0400
#endif

#define KRB5_KDB_OPT_SET_DB_NAME        0
#define KRB5_KDB_OPT_SET_LOCK_MODE      1

#define KRB5_DB_LOCKMODE_SHARED       0x0001
#define KRB5_DB_LOCKMODE_EXCLUSIVE    0x0002
#define KRB5_DB_LOCKMODE_PERMANENT    0x0008

/* libkdb.spec */
krb5_error_code krb5_db_setup_lib_handle(krb5_context kcontext);
krb5_error_code krb5_db_open( krb5_context kcontext, char **db_args, int mode );
krb5_error_code krb5_db_init  ( krb5_context kcontext );
krb5_error_code krb5_db_create ( krb5_context kcontext, char **db_args );
krb5_error_code krb5_db_inited  ( krb5_context kcontext );
krb5_error_code kdb5_db_create ( krb5_context kcontext, char **db_args );
krb5_error_code krb5_db_fini ( krb5_context kcontext );
const char * krb5_db_errcode2string ( krb5_context kcontext, long err_code );
krb5_error_code krb5_db_destroy ( krb5_context kcontext, char **db_args );
krb5_error_code krb5_db_promote ( krb5_context kcontext, char **db_args );
krb5_error_code krb5_db_get_age ( krb5_context kcontext, char *db_name, time_t *t );
krb5_error_code krb5_db_lock ( krb5_context kcontext, int lock_mode );
krb5_error_code krb5_db_unlock ( krb5_context kcontext );
krb5_error_code krb5_db_get_principal ( krb5_context kcontext,
                                        krb5_const_principal search_for,
                                        unsigned int flags,
                                        krb5_db_entry **entry );
void krb5_db_free_principal ( krb5_context kcontext, krb5_db_entry *entry );
krb5_error_code krb5_db_put_principal ( krb5_context kcontext,
                                        krb5_db_entry *entry );
krb5_error_code krb5_db_delete_principal ( krb5_context kcontext,
                                           krb5_principal search_for );
krb5_error_code krb5_db_rename_principal ( krb5_context kcontext,
                                           krb5_principal source,
                                           krb5_principal target );

/*
 * Iterate over principals in the KDB.  If the callback may write to the DB,
 * the caller must get an exclusive lock with krb5_db_lock before iterating,
 * and release it with krb5_db_unlock after iterating.
 */
krb5_error_code krb5_db_iterate ( krb5_context kcontext,
                                  char *match_entry,
                                  int (*func) (krb5_pointer, krb5_db_entry *),
                                  krb5_pointer func_arg, krb5_flags iterflags );

krb5_error_code krb5_db_store_master_key  ( krb5_context kcontext,
                                            char *keyfile,
                                            krb5_principal mname,
                                            krb5_kvno kvno,
                                            krb5_keyblock *key,
                                            char *master_pwd);
krb5_error_code krb5_db_store_master_key_list  ( krb5_context kcontext,
                                                 char *keyfile,
                                                 krb5_principal mname,
                                                 char *master_pwd);
krb5_error_code krb5_db_fetch_mkey  ( krb5_context   context,
                                      krb5_principal mname,
                                      krb5_enctype   etype,
                                      krb5_boolean   fromkeyboard,
                                      krb5_boolean   twice,
                                      char          *db_args,
                                      krb5_kvno     *kvno,
                                      krb5_data     *salt,
                                      krb5_keyblock *key);
krb5_error_code
krb5_db_fetch_mkey_list( krb5_context    context,
                         krb5_principal  mname,
                         const krb5_keyblock * mkey );

krb5_error_code
krb5_dbe_find_enctype( krb5_context     kcontext,
                       krb5_db_entry    *dbentp,
                       krb5_int32               ktype,
                       krb5_int32               stype,
                       krb5_int32               kvno,
                       krb5_key_data    **kdatap);

krb5_error_code krb5_dbe_search_enctype ( krb5_context kcontext,
                                          krb5_db_entry *dbentp,
                                          krb5_int32 *start,
                                          krb5_int32 ktype,
                                          krb5_int32 stype,
                                          krb5_int32 kvno,
                                          krb5_key_data **kdatap);

krb5_error_code
krb5_db_setup_mkey_name ( krb5_context context,
                          const char *keyname,
                          const char *realm,
                          char **fullname,
                          krb5_principal *principal);

/**
 * Decrypts the key given in @@a key_data. If @a mkey is specified, that
 * master key is used. If @a mkey is NULL, then all master keys are tried.
 */
krb5_error_code
krb5_dbe_decrypt_key_data( krb5_context         context,
                           const krb5_keyblock        * mkey,
                           const krb5_key_data        * key_data,
                           krb5_keyblock      * dbkey,
                           krb5_keysalt       * keysalt);

krb5_error_code
krb5_dbe_encrypt_key_data( krb5_context                 context,
                           const krb5_keyblock        * mkey,
                           const krb5_keyblock        * dbkey,
                           const krb5_keysalt         * keysalt,
                           int                          keyver,
                           krb5_key_data              * key_data);

krb5_error_code
krb5_dbe_fetch_act_key_list(krb5_context          context,
                            krb5_principal       princ,
                            krb5_actkvno_node  **act_key_list);

krb5_error_code
krb5_dbe_find_act_mkey( krb5_context          context,
                        krb5_actkvno_node   * act_mkey_list,
                        krb5_kvno           * act_kvno,
                        krb5_keyblock      ** act_mkey);

krb5_error_code
krb5_dbe_find_mkey( krb5_context         context,
                    krb5_db_entry      * entry,
                    krb5_keyblock      ** mkey);

/* Set *mkvno to mkvno in entry tl_data, or 0 if not present. */
krb5_error_code
krb5_dbe_lookup_mkvno( krb5_context    context,
                       krb5_db_entry * entry,
                       krb5_kvno     * mkvno);

krb5_keylist_node *
krb5_db_mkey_list_alias( krb5_context kcontext );

/* Set *mkvno to mkvno in entry tl_data, or minimum value from mkey_list. */
krb5_error_code
krb5_dbe_get_mkvno( krb5_context        context,
                    krb5_db_entry     * entry,
                    krb5_kvno         * mkvno);

krb5_error_code
krb5_dbe_lookup_mod_princ_data( krb5_context          context,
                                krb5_db_entry       * entry,
                                krb5_timestamp      * mod_time,
                                krb5_principal      * mod_princ);

krb5_error_code
krb5_dbe_lookup_mkey_aux( krb5_context         context,
                          krb5_db_entry      * entry,
                          krb5_mkey_aux_node ** mkey_aux_data_list);
krb5_error_code
krb5_dbe_update_mkvno( krb5_context    context,
                       krb5_db_entry * entry,
                       krb5_kvno       mkvno);

krb5_error_code
krb5_dbe_lookup_actkvno( krb5_context         context,
                         krb5_db_entry      * entry,
                         krb5_actkvno_node ** actkvno_list);

krb5_error_code
krb5_dbe_update_mkey_aux( krb5_context          context,
                          krb5_db_entry       * entry,
                          krb5_mkey_aux_node  * mkey_aux_data_list);

krb5_error_code
krb5_dbe_update_actkvno(krb5_context    context,
                        krb5_db_entry * entry,
                        const krb5_actkvno_node *actkvno_list);

krb5_error_code
krb5_dbe_update_last_pwd_change( krb5_context     context,
                                 krb5_db_entry  * entry,
                                 krb5_timestamp   stamp);

krb5_error_code
krb5_dbe_update_last_admin_unlock( krb5_context     context,
                                   krb5_db_entry  * entry,
                                   krb5_timestamp   stamp);

krb5_error_code
krb5_dbe_lookup_tl_data( krb5_context          context,
                         krb5_db_entry       * entry,
                         krb5_tl_data        * ret_tl_data);

krb5_error_code
krb5_dbe_create_key_data( krb5_context          context,
                          krb5_db_entry       * entry);

krb5_error_code
krb5_dbe_update_mod_princ_data( krb5_context          context,
                                krb5_db_entry       * entry,
                                krb5_timestamp        mod_date,
                                krb5_const_principal  mod_princ);

/*
 * These are wrappers around realloc() and free().  Applications and KDB
 * modules can use them when manipulating principal and policy entries to
 * ensure that they allocate and free memory in a manner compatible with the
 * library.  Using libkrb5 or libkbd5 functions to construct values (such as
 * krb5_copy_principal() to construct the princ field of a krb5_db_entry) is
 * also safe.  On Unix platforms, just using malloc() and free() is safe as
 * long as the application or module does not use a malloc replacement.
 */
void *krb5_db_alloc( krb5_context kcontext,
                     void *ptr,
                     size_t size );
void krb5_db_free( krb5_context kcontext,
                   void *ptr);

krb5_error_code
krb5_dbe_lookup_last_pwd_change( krb5_context          context,
                                 krb5_db_entry       * entry,
                                 krb5_timestamp      * stamp);

krb5_error_code
krb5_dbe_lookup_last_admin_unlock( krb5_context          context,
                                   krb5_db_entry       * entry,
                                   krb5_timestamp      * stamp);

/* Retrieve the set of string attributes in entry, in no particular order.
 * Free *strings_out with krb5_dbe_free_strings when done. */
krb5_error_code
krb5_dbe_get_strings(krb5_context context, krb5_db_entry *entry,
                     krb5_string_attr **strings_out, int *count_out);

/* Retrieve a single string attribute from entry, or NULL if there is no
 * attribute for key.  Free *value_out with krb5_dbe_free_string when done. */
krb5_error_code
krb5_dbe_get_string(krb5_context context, krb5_db_entry *entry,
                    const char *key, char **value_out);

/* Change or add a string attribute in entry, or delete it if value is NULL. */
krb5_error_code
krb5_dbe_set_string(krb5_context context, krb5_db_entry *entry,
                    const char *key, const char *value);

krb5_error_code
krb5_dbe_delete_tl_data( krb5_context    context,
                         krb5_db_entry * entry,
                         krb5_int16      tl_data_type);

krb5_error_code
krb5_db_update_tl_data(krb5_context          context,
                       krb5_int16          * n_tl_datap,
                       krb5_tl_data        **tl_datap,
                       krb5_tl_data        * new_tl_data);

krb5_error_code
krb5_dbe_update_tl_data( krb5_context          context,
                         krb5_db_entry       * entry,
                         krb5_tl_data        * new_tl_data);

/* Compute the salt for a key data entry given the corresponding principal. */
krb5_error_code
krb5_dbe_compute_salt(krb5_context context, const krb5_key_data *key,
                      krb5_const_principal princ, krb5_int16 *salttype_out,
                      krb5_data **salt_out);

/*
 * Modify the key data of entry to explicitly store salt values using the
 * KRB5_KDB_SALTTYPE_SPECIAL salt type.
 */
krb5_error_code
krb5_dbe_specialize_salt(krb5_context context, krb5_db_entry *entry);

krb5_error_code
krb5_dbe_cpw( krb5_context        kcontext,
              krb5_keyblock       * master_key,
              krb5_key_salt_tuple       * ks_tuple,
              int                         ks_tuple_count,
              char              * passwd,
              int                         new_kvno,
              krb5_boolean        keepold,
              krb5_db_entry     * db_entry);

krb5_error_code
krb5_dbe_ark( krb5_context        context,
              krb5_keyblock       * master_key,
              krb5_key_salt_tuple       * ks_tuple,
              int                         ks_tuple_count,
              krb5_db_entry     * db_entry);

krb5_error_code
krb5_dbe_crk( krb5_context        context,
              krb5_keyblock       * master_key,
              krb5_key_salt_tuple       * ks_tuple,
              int                         ks_tuple_count,
              krb5_boolean        keepold,
              krb5_db_entry     * db_entry);

krb5_error_code
krb5_dbe_apw( krb5_context        context,
              krb5_keyblock       * master_key,
              krb5_key_salt_tuple       * ks_tuple,
              int                         ks_tuple_count,
              char              * passwd,
              krb5_db_entry     * db_entry);

int
krb5_db_get_key_data_kvno( krb5_context    context,
                           int             count,
                           krb5_key_data * data);

krb5_error_code krb5_db_sign_authdata(krb5_context kcontext,
                                      unsigned int flags,
                                      krb5_const_principal client_princ,
                                      krb5_const_principal server_princ,
                                      krb5_db_entry *client,
                                      krb5_db_entry *server,
                                      krb5_db_entry *header_server,
                                      krb5_db_entry *local_tgt,
                                      krb5_keyblock *client_key,
                                      krb5_keyblock *server_key,
                                      krb5_keyblock *header_key,
                                      krb5_keyblock *local_tgt_key,
                                      krb5_keyblock *session_key,
                                      krb5_timestamp authtime,
                                      krb5_authdata **tgt_auth_data,
                                      void *ad_info,
                                      krb5_data ***auth_indicators,
                                      krb5_authdata ***signed_auth_data);

krb5_error_code krb5_db_check_transited_realms(krb5_context kcontext,
                                               const krb5_data *tr_contents,
                                               const krb5_data *client_realm,
                                               const krb5_data *server_realm);

krb5_error_code krb5_db_check_policy_as(krb5_context kcontext,
                                        krb5_kdc_req *request,
                                        krb5_db_entry *client,
                                        krb5_db_entry *server,
                                        krb5_timestamp kdc_time,
                                        const char **status,
                                        krb5_pa_data ***e_data);

krb5_error_code krb5_db_check_policy_tgs(krb5_context kcontext,
                                         krb5_kdc_req *request,
                                         krb5_db_entry *server,
                                         krb5_ticket *ticket,
                                         const char **status,
                                         krb5_pa_data ***e_data);

void krb5_db_audit_as_req(krb5_context kcontext, krb5_kdc_req *request,
                          const krb5_address *local_addr,
                          const krb5_address *remote_addr,
                          krb5_db_entry *client, krb5_db_entry *server,
                          krb5_timestamp authtime, krb5_error_code error_code);

void krb5_db_refresh_config(krb5_context kcontext);

krb5_error_code krb5_db_check_allowed_to_delegate(krb5_context kcontext,
                                                  krb5_const_principal client,
                                                  const krb5_db_entry *server,
                                                  krb5_const_principal proxy);

krb5_error_code krb5_db_get_s4u_x509_principal(krb5_context kcontext,
                                               const krb5_data *client_cert,
                                               krb5_const_principal in_princ,
                                               unsigned int flags,
                                               krb5_db_entry **entry);

krb5_error_code krb5_db_allowed_to_delegate_from(krb5_context context,
                                                 krb5_const_principal client,
                                                 krb5_const_principal server,
                                                 void *server_ad_info,
                                                 const krb5_db_entry *proxy);

krb5_error_code krb5_db_get_authdata_info(krb5_context context,
                                          unsigned int flags,
                                          krb5_authdata **in_authdata,
                                          krb5_const_principal client_princ,
                                          krb5_const_principal server_princ,
                                          krb5_keyblock *server_key,
                                          krb5_keyblock *krbtgt_key,
                                          krb5_db_entry *krbtgt,
                                          krb5_timestamp authtime,
                                          void **ad_info_out,
                                          krb5_principal *client_out);

void krb5_db_free_authdata_info(krb5_context context, void *ad_info);

/**
 * Sort an array of @a krb5_key_data keys in descending order by their kvno.
 * Key data order within a kvno is preserved.
 *
 * @param key_data
 *     The @a krb5_key_data array to sort.  This is sorted in place so the
 *     array will be modified.
 * @param key_data_length
 *     The length of @a key_data.
 */
void
krb5_dbe_sort_key_data(krb5_key_data *key_data, size_t key_data_length);

/* default functions. Should not be directly called */
/*
 *   Default functions prototype
 */

krb5_error_code
krb5_dbe_def_search_enctype( krb5_context kcontext,
                             krb5_db_entry *dbentp,
                             krb5_int32 *start,
                             krb5_int32 ktype,
                             krb5_int32 stype,
                             krb5_int32 kvno,
                             krb5_key_data **kdatap);

krb5_error_code
krb5_def_store_mkey_list( krb5_context context,
                          char *keyfile,
                          krb5_principal mname,
                          krb5_keylist_node *keylist,
                          char *master_pwd);

krb5_error_code
krb5_db_def_fetch_mkey( krb5_context   context,
                        krb5_principal mname,
                        krb5_keyblock *key,
                        krb5_kvno     *kvno,
                        char          *db_args);

krb5_error_code
krb5_def_fetch_mkey_list( krb5_context            context,
                          krb5_principal        mprinc,
                          const krb5_keyblock  *mkey,
                          krb5_keylist_node  **mkeys_list);

krb5_error_code
krb5_dbe_def_cpw( krb5_context    context,
                  krb5_keyblock       * master_key,
                  krb5_key_salt_tuple   * ks_tuple,
                  int                     ks_tuple_count,
                  char          * passwd,
                  int                     new_kvno,
                  krb5_boolean    keepold,
                  krb5_db_entry * db_entry);

krb5_error_code
krb5_dbe_def_decrypt_key_data( krb5_context             context,
                               const krb5_keyblock    * mkey,
                               const krb5_key_data    * key_data,
                               krb5_keyblock          * dbkey,
                               krb5_keysalt           * keysalt);

krb5_error_code
krb5_dbe_def_encrypt_key_data( krb5_context             context,
                               const krb5_keyblock    * mkey,
                               const krb5_keyblock    * dbkey,
                               const krb5_keysalt     * keysalt,
                               int                      keyver,
                               krb5_key_data          * key_data);

krb5_error_code
krb5_db_def_rename_principal( krb5_context kcontext,
                              krb5_const_principal source,
                              krb5_const_principal target);

krb5_error_code
krb5_db_create_policy( krb5_context kcontext,
                       osa_policy_ent_t policy);

krb5_error_code
krb5_db_get_policy ( krb5_context kcontext,
                     char *name,
                     osa_policy_ent_t *policy );

krb5_error_code
krb5_db_put_policy( krb5_context kcontext,
                    osa_policy_ent_t policy);

krb5_error_code
krb5_db_iter_policy( krb5_context kcontext,
                     char *match_entry,
                     osa_adb_iter_policy_func func,
                     void *data);

krb5_error_code
krb5_db_delete_policy( krb5_context kcontext,
                       char *policy);

void
krb5_db_free_policy( krb5_context kcontext,
                     osa_policy_ent_t policy);

krb5_error_code
krb5_db_set_context(krb5_context, void *db_context);

krb5_error_code
krb5_db_get_context(krb5_context, void **db_context);

void
krb5_dbe_free_key_data_contents(krb5_context, krb5_key_data *);

void
krb5_dbe_free_key_list(krb5_context, krb5_keylist_node *);

void
krb5_dbe_free_actkvno_list(krb5_context, krb5_actkvno_node *);

void
krb5_dbe_free_mkey_aux_list(krb5_context, krb5_mkey_aux_node *);

void
krb5_dbe_free_tl_data(krb5_context, krb5_tl_data *);

void
krb5_dbe_free_strings(krb5_context, krb5_string_attr *, int count);

void
krb5_dbe_free_string(krb5_context, char *);

/*
 * Register the KDB keytab type, allowing "KDB:" to be used as a keytab name.
 * For this type to work, the context used for keytab operations must have an
 * associated database handle (via krb5_db_open()).
 */
krb5_error_code krb5_db_register_keytab(krb5_context context);

#define KRB5_KDB_DEF_FLAGS      0

#define KDB_MAX_DB_NAME                 128
#define KDB_REALM_SECTION               "realms"
#define KDB_MODULE_POINTER              "database_module"
#define KDB_MODULE_DEF_SECTION          "dbdefaults"
#define KDB_MODULE_SECTION              "dbmodules"
#define KDB_LIB_POINTER                 "db_library"
#define KDB_DATABASE_CONF_FILE          DEFAULT_SECURE_PROFILE_PATH
#define KDB_DATABASE_ENV_PROF           KDC_PROFILE_ENV

#define KRB5_KDB_OPEN_RW                0
#define KRB5_KDB_OPEN_RO                1

#define KRB5_KDB_OPT_SET_DB_NAME        0
#define KRB5_KDB_OPT_SET_LOCK_MODE      1

/*
 * This number indicates the date of the last incompatible change to the DAL.
 * The maj_ver field of the module's vtable structure must match this version.
 */
#define KRB5_KDB_DAL_MAJOR_VERSION 8

/*
 * A krb5_context can hold one database object.  Modules should use
 * krb5_db_set_context and krb5_db_get_context to store state associated with
 * the database object.
 *
 * Some module functions are mandatory for KDC operation; others are optional
 * or apply only to administrative operations.  If a function is optional, a
 * module can leave the function pointer as NULL.  Alternatively, modules can
 * return KRB5_PLUGIN_OP_NOTSUPP when asked to perform an inapplicable action.
 *
 * Some module functions have default implementations which will call back into
 * the vtable interface.  Leave these functions as NULL to use the default
 * implementations.
 *
 * The documentation in these comments describes the DAL as it is currently
 * implemented and used, not as it should be.  So if anything seems off, that
 * probably means the current state of things is off.
 *
 * Modules must allocate memory for principal entries, policy entries, and
 * other structures using an allocator compatible with malloc() as seen by
 * libkdb5 and libkrb5.  Modules may link against libkdb5 and call
 * krb5_db_alloc() to be certain that the same malloc implementation is used.
 */

typedef struct _kdb_vftabl {
    short int maj_ver;
    short int min_ver;

/*
     * Mandatory: Invoked after the module library is loaded, when the first DB
     * using the module is opened, across all contexts.
     */
    krb5_error_code (*init_library)(void);

/*
     * Mandatory: Invoked before the module library is unloaded, after the last
     * DB using the module is closed, across all contexts.
     */
    krb5_error_code (*fini_library)(void);

/*
     * Mandatory: Initialize a database object.  Profile settings should be
     * read from conf_section inside KDB_MODULE_SECTION.  db_args communicates
     * command-line arguments for module-specific flags.  mode will be one of
     * KRB5_KDB_OPEN_{RW,RO} or'd with one of
     * KRB5_KDB_SRV_TYPE_{KDC,ADMIN,PASSWD,OTHER}.
     */
    krb5_error_code (*init_module)(krb5_context kcontext, char *conf_section,
                                   char **db_args, int mode);

/*
     * Mandatory: Finalize the database object contained in a context.  Free
     * any state contained in the db_context pointer and null it out.
     */
    krb5_error_code (*fini_module)(krb5_context kcontext);

/*
     * Optional: Initialize a database object while creating the underlying
     * database.  conf_section and db_args have the same meaning as in
     * init_module.  This function may return an error if the database already
     * exists.  Used by kdb5_util create.
     *
     * If db_args contains the value "temporary", the module should create an
     * exclusively locked side copy of the database suitable for loading in a
     * propagation from master to replica.  This side copy will later be
     * promoted with promote_db, allowing complete updates of the DB with no
     * loss in read availability.  If the module cannot comply with this
     * architecture, it should return an error.
     */
    krb5_error_code (*create)(krb5_context kcontext, char *conf_section,
                              char **db_args);

/*
     * Optional: Destroy a database.  conf_section and db_args have the same
     * meaning as in init_module.  Used by kdb5_util destroy.  In current
     * usage, the database is destroyed while open, so the module should handle
     * that.
     */
    krb5_error_code (*destroy)(krb5_context kcontext, char *conf_section,
                               char **db_args);

/*
     * Deprecated: No longer used as of krb5 1.10; can be removed in the next
     * DAL revision.  Modules should leave as NULL.
     */
    krb5_error_code (*get_age)(krb5_context kcontext, char *db_name,
                               time_t *age);

/*
     * Optional: Lock the database, with semantics depending on the mode
     * argument:
     *
     * KRB5_DB_LOCKMODE_SHARED: Lock may coexist with other shared locks.
     * KRB5_DB_LOCKMODE_EXCLUSIVE: Lock may not coexist with other locks.
     * KRB5_DB_LOCKMODE_PERMANENT: Exclusive lock surviving process exit.
     *
     * Used by the "kadmin lock" command, incremental propagation, and
     * kdb5_util dump.  Incremental propagation support requires shared locks
     * to operate.  kdb5_util dump will continue unlocked if the module returns
     * KRB5_PLUGIN_OP_NOTSUPP.
     */
    krb5_error_code (*lock)(krb5_context kcontext, int mode);

/* Optional: Release a lock created with db_lock. */
    krb5_error_code (*unlock)(krb5_context kcontext);

/*
     * Mandatory: Set *entry to an allocated entry for the principal
     * search_for.  If the principal is not found, return KRB5_KDB_NOENTRY.
     *
     * The meaning of flags are as follows:
     *
     * KRB5_KDB_FLAG_CANONICALIZE: Set by the KDC when looking up entries for
     *     an AS or TGS request with canonicalization requested.  Determines
     *     whether the module should return out-of-realm referrals.
     *
     * KRB5_KDB_FLAG_INCLUDE_PAC: Set by the KDC during an AS request when the
     *     client requested PAC information during padata, and during most TGS
     *     requests.  Indicates that the module should include PAC information
     *     when its sign_authdata method is invoked.
     *
     * KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY: Set by the KDC when looking up the
     *     client entry in an AS request.  Affects how the module should return
     *     out-of-realm referrals.
     *
     * KRB5_KDB_FLAG_MAP_PRINCIPALS: Set by the KDC when looking up the client
     *     entry during TGS requests, except for S4U TGS requests and requests
     *     where the server entry has the KRB5_KDB_NO_AUTH_DATA_REQUIRED
     *     attribute.  Indicates that the module should map foreign principals
     *     to local principals if it supports doing so.
     *
     * KRB5_KDB_FLAG_PROTOCOL_TRANSITION: Set by the KDC when looking up the
     *     client entry during an S4U2Self TGS request.  This affects the PAC
     *     information which should be included when authorization data is
     *     generated; see the Microsoft S4U specification for details.
     *
     * KRB5_KDB_FLAG_CONSTRAINED_DELEGATION: Set by the KDC when looking up the
     *     client entry during an S4U2Proxy TGS request.  Also affects PAC
     *     generation.
     *
     * KRB5_KDB_FLAG_CROSS_REALM: Set by the KDC after looking up a server
     *     entry during a TGS request, if the header ticket was issued by a
     *     different realm.
     *
     * KRB5_KDB_FLAG_ISSUING_REFERRAL: Set by the KDC after looking up a server
     *     entry during a TGS request, if the requested server principal is not
     *     part of the realm being served, and a referral or alternate TGT will
     *     be issued instead.
     *
     * A module may return an in-realm alias by setting (*entry)->princ to the
     * canonical name.  The KDC will decide based on the request whether to use
     * the requested name or the canonical name in the issued ticket.
     *
     * A module can return a referral to another realm if
     * KRB5_KDB_FLAG_CANONICALIZE is set, or if
     * KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY is set and search_for->type is
     * KRB5_NT_ENTERPRISE_PRINCIPAL.  If KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY is
     * set, the module should return a referral by simply filling in an
     * out-of-realm name in (*entry)->princ and setting all other fields to
     * NULL.  Otherwise, the module should return the entry for the cross-realm
     * TGS of the referred-to realm.  For TGS referals, the module can also
     * include tl-data of type KRB5_TL_SERVER_REFERRAL containing ASN.1-encoded
     * Windows referral data as documented in
     * draft-ietf-krb-wg-kerberos-referrals-11 appendix A; this will be
     * returned to the client as encrypted padata.
     */
    krb5_error_code (*get_principal)(krb5_context kcontext,
                                     krb5_const_principal search_for,
                                     unsigned int flags,
                                     krb5_db_entry **entry);

/*
     * Optional: Create or modify a principal entry.  db_args communicates
     * command-line arguments for module-specific flags.
     *
     * The mask field of an entry indicates the changed fields.  Mask values
     * are defined in kadmin's admin.h header.  If KADM5_PRINCIPAL is set in
     * the mask, the entry is new; otherwise it already exists.  All fields of
     * an entry are expected to contain correct values, regardless of whether
     * they are specified in the mask, so it is acceptable for a module to
     * ignore the mask and update the entire entry.
     */
    krb5_error_code (*put_principal)(krb5_context kcontext,
                                     krb5_db_entry *entry, char **db_args);

/*
     * Optional: Delete the entry for the principal search_for.  If the
     * principal did not exist, return KRB5_KDB_NOENTRY.
     */
    krb5_error_code (*delete_principal)(krb5_context kcontext,
                                        krb5_const_principal search_for);

/*
     * Optional with default: Rename a principal.  If the source principal does
     * not exist, return KRB5_KDB_NOENTRY.  If the target exists, return an
     * error.
     *
     * NOTE: If the module chooses to implement a custom function for renaming
     * a principal instead of using the default, then rename operations will
     * fail if iprop logging is enabled.
     */
    krb5_error_code (*rename_principal)(krb5_context kcontext,
                                        krb5_const_principal source,
                                        krb5_const_principal target);

/*
     * Optional: For each principal entry in the database, invoke func with the
     * argments func_arg and the entry data.  If match_entry is specified, the
     * module may narrow the iteration to principal names matching that regular
     * expression; a module may alternatively ignore match_entry.
     */
    krb5_error_code (*iterate)(krb5_context kcontext,
                               char *match_entry,
                               int (*func)(krb5_pointer, krb5_db_entry *),
                               krb5_pointer func_arg, krb5_flags iterflags);

/*
     * Optional: Create a password policy entry.  Return an error if the policy
     * already exists.
     */
    krb5_error_code (*create_policy)(krb5_context kcontext,
                                     osa_policy_ent_t policy);

/*
     * Optional: Set *policy to the policy entry of the specified name.  If the
     * entry does not exist, return KRB5_KDB_NOENTRY.
     */
    krb5_error_code (*get_policy)(krb5_context kcontext, char *name,
                                  osa_policy_ent_t *policy);

/*
     * Optional: Modify an existing password policy entry to match the values
     * in policy.  Return an error if the policy does not already exist.
     */
    krb5_error_code (*put_policy)(krb5_context kcontext,
                                  osa_policy_ent_t policy);

/*
     * Optional: For each password policy entry in the database, invoke func
     * with the argments data and the entry data.  If match_entry is specified,
     * the module may narrow the iteration to policy names matching that
     * regular expression; a module may alternatively ignore match_entry.
     */
    krb5_error_code (*iter_policy)(krb5_context kcontext, char *match_entry,
                                   osa_adb_iter_policy_func func,
                                   void *data);

/*
     * Optional: Delete the password policy entry with the name policy.  Return
     * an error if the entry does not exist.
     */
    krb5_error_code (*delete_policy)(krb5_context kcontext, char *policy);

/*
     * Optional with default: Retrieve a master keyblock from the stash file
     * db_args, filling in *key and *kvno.  mname is the name of the master
     * principal for the realm.
     *
     * The default implementation reads the master keyblock from a keytab or
     * old-format stash file.
     */
    krb5_error_code (*fetch_master_key)(krb5_context kcontext,
                                        krb5_principal mname,
                                        krb5_keyblock *key, krb5_kvno *kvno,
                                        char *db_args);

/*
     * Optional with default: Given a keyblock for some version of the
     * database's master key, fetch the decrypted master key values from the
     * database and store the list into *mkeys_list.  The caller will free
     * *mkeys_list using a libkdb5 function which uses the standard free()
     * function, so the module must not use a custom allocator.
     *
     * The caller may not know the version number of the master key it has, in
     * which case it will pass IGNORE_VNO.
     *
     * The default implementation ignores kvno and tries the key against the
     * current master key data and all KRB5_TL_MKEY_AUX values, which contain
     * copies of the master keys encrypted with old master keys.
     */
    krb5_error_code (*fetch_master_key_list)(krb5_context kcontext,
                                             krb5_principal mname,
                                             const krb5_keyblock *key,
                                             krb5_keylist_node **mkeys_list);

/*
     * Optional with default: Save a list of master keyblocks, obtained from
     * fetch_master_key_list, into the stash file db_arg.  The caller will set
     * master_pwd to NULL, so the module should just ignore it.  mname is the
     * name of the master principal for the realm.
     *
     * The default implementation saves the list of master keys in a
     * keytab-format file.
     */
    krb5_error_code (*store_master_key_list)(krb5_context kcontext,
                                             char *db_arg,
                                             krb5_principal mname,
                                             krb5_keylist_node *keylist,
                                             char *master_pwd);

/*
     * Optional with default: Starting at position *start, scan the key data of
     * a database entry for a key matching the enctype ktype, the salt type
     * stype, and the version kvno.  Store the resulting key into *kdatap and
     * set *start to the position after the key found.  If ktype is negative,
     * match any enctype.  If stype is negative, match any salt type.  If kvno
     * is zero or negative, find the most recent key version satisfying the
     * other constraints.
     */
    krb5_error_code (*dbe_search_enctype)(krb5_context kcontext,
                                          krb5_db_entry *dbentp,
                                          krb5_int32 *start, krb5_int32 ktype,
                                          krb5_int32 stype, krb5_int32 kvno,
                                          krb5_key_data **kdatap);

/*
     * Optional with default: Change the key data for db_entry to include keys
     * derived from the password passwd in each of the specified key-salt
     * types, at version new_kvno.  Discard the old key data if keepold is not
     * set.
     *
     * The default implementation uses the keyblock master_key to encrypt each
     * new key, via the function encrypt_key_data.
     */
    krb5_error_code (*change_pwd)(krb5_context context,
                                  krb5_keyblock *master_key,
                                  krb5_key_salt_tuple *ks_tuple,
                                  int ks_tuple_count, char *passwd,
                                  int new_kvno, krb5_boolean keepold,
                                  krb5_db_entry *db_entry);

/*
     * Optional: Promote a temporary database to be the live one.  context must
     * be initialized with an exclusively locked database created with the
     * "temporary" db_arg.  On success, the database object contained in
     * context will be finalized.
     *
     * This method is used by kdb5_util load to replace the live database with
     * minimal loss of read availability.
     */
    krb5_error_code (*promote_db)(krb5_context context, char *conf_section,
                                  char **db_args);

/*
     * Optional with default: Decrypt the key in key_data with master keyblock
     * mkey, placing the result into dbkey.  Copy the salt from key_data, if
     * any, into keysalt.  Either dbkey or keysalt may be left unmodified on
     * successful return if key_data does not contain key or salt information.
     *
     * The default implementation expects the encrypted key (in krb5_c_encrypt
     * format) to be stored in key_data_contents[0], with length given by
     * key_data_length[0].  If key_data_ver is 2, it expects the salt to be
     * stored, unencrypted, in key_data_contents[1], with length given by
     * key_data_length[1].
     */
    krb5_error_code (*decrypt_key_data)(krb5_context kcontext,
                                        const krb5_keyblock *mkey,
                                        const krb5_key_data *key_data,
                                        krb5_keyblock *dbkey,
                                        krb5_keysalt *keysalt);

/*
     * Optional with default: Encrypt dbkey with master keyblock mkey, placing
     * the result into key_data along with keysalt.
     *
     * The default implementation stores the encrypted key (in krb5_c_encrypt
     * format) in key_data_contents[0] and the length in key_data_length[0].
     * If keysalt is specified, it sets key_data_ver to 2, and stores the salt
     * in key_data_contents[1] and its length in key_data_length[1].  If
     * keysalt is not specified, key_data_ver is set to 1.
     */
    krb5_error_code (*encrypt_key_data)(krb5_context kcontext,
                                        const krb5_keyblock *mkey,
                                        const krb5_keyblock *dbkey,
                                        const krb5_keysalt *keysalt,
                                        int keyver, krb5_key_data *key_data);

/*
     * Optional: Generate signed authorization data, such as a Windows PAC, for
     * the ticket to be returned to the client.  Place the signed authorization
     * data, if any, in *signed_auth_data.  This function will be invoked for
     * an AS request if the client included padata requesting a PAC.  This
     * function will be invoked for a TGS request if there is authorization
     * data in the TGT, if the client is from another realm, or if the TGS
     * request is an S4U2Self or S4U2Proxy request.  This function will not be
     * invoked during TGS requests if the server principal has the
     * no_auth_data_required attribute set.  Input parameters are:
     *
     *   flags: The flags used to look up the client principal.
     *
     *   client_princ: For S4U2Self and S4U2Proxy TGS requests, the client
     *     principal requested by the service; for regular TGS requests, the
     *     possibly-canonicalized client principal.
     *
     *   server_princ: The server principal in the request.
     *
     *   client: The DB entry of the client if it is in the local realm, NULL
     *     if not.  For S4U2Self and S4U2Proxy TGS requests, this is the DB
     *     entry for the client principal requested by the service.
     *
     *   server: The DB entry of the service principal, or of a cross-realm
     *     krbtgt principal in case of referral.
     *
     *   header_server: For S4U2Proxy requests, the DB entry of the second
     *     ticket server.  For other TGS requests, the DB entry of the header
     *     ticket server.  For AS requests, NULL.
     *
     *   local_tgt: the DB entry of the local krbtgt principal.
     *
     *   client_key: The reply key for the KDC request, before any FAST armor
     *     is applied.  For AS requests, this may be the client's long-term key
     *     or a key chosen by a preauth mechanism.  For TGS requests, this may
     *     be the subkey found in the AP-REQ or the session key of the TGT.
     *
     *   server_key: The server key used to encrypt the returned ticket.
     *
     *   header_key: For S4U2Proxy requests, the key used to decrypt the second
     *     ticket.  For TGS requests, the key used to decrypt the header
     *     ticket.  For AS requests, NULL.
     *
     *   local_tgt_key: The decrypted first key of local_tgt.
     *
     *   session_key: The session key of the ticket being granted to the
     *     requestor.
     *
     *   authtime: The timestamp of the original client authentication time.
     *     For AS requests, this is the current time.  For TGS requests, this
     *     is the authtime of the subject ticket (TGT or S4U2Proxy evidence
     *     ticket).
     *
     *   tgt_auth_data: For TGS requests, the authorization data present in the
     *     subject ticket.  For AS requests, NULL.
     *
     *   ad_info: For TGS requests, the parsed authorization data if obtained
     *     by get_authdata_info method from the authorization data present in
     *     the subject ticket.  Otherwise NULL.
     *
     *   auth_indicators: Points to NULL or a null-terminated list of krb5_data
     *     pointers, each containing an authentication indicator (RFC 8129).
     *     The method may modify this list, or free it and replace
     *     *auth_indicators with NULL, to change which auth indicators will be
     *     included in the ticket.
     */
    krb5_error_code (*sign_authdata)(krb5_context kcontext,
                                     unsigned int flags,
                                     krb5_const_principal client_princ,
                                     krb5_const_principal server_princ,
                                     krb5_db_entry *client,
                                     krb5_db_entry *server,
                                     krb5_db_entry *header_server,
                                     krb5_db_entry *local_tgt,
                                     krb5_keyblock *client_key,
                                     krb5_keyblock *server_key,
                                     krb5_keyblock *header_key,
                                     krb5_keyblock *local_tgt_key,
                                     krb5_keyblock *session_key,
                                     krb5_timestamp authtime,
                                     krb5_authdata **tgt_auth_data,
                                     void *ad_info,
                                     krb5_data ***auth_indicators,
                                     krb5_authdata ***signed_auth_data);

/*
     * Optional: Perform a policy check on a cross-realm ticket's transited
     * field.  Return 0 if the check authoritatively succeeds,
     * KRB5_PLUGIN_NO_HANDLE to use the core transited-checking mechanisms, or
     * another error (other than KRB5_PLUGIN_OP_NOTSUPP) if the check fails.
     */
    krb5_error_code (*check_transited_realms)(krb5_context kcontext,
                                              const krb5_data *tr_contents,
                                              const krb5_data *client_realm,
                                              const krb5_data *server_realm);

/*
     * Optional: Perform a policy check on an AS request, in addition to the
     * standard policy checks.  Return 0 if the AS request is allowed.  If the
     * AS request is not allowed:
     *   - Place a short string literal into *status.
     *   - If desired, place data into e_data.  Any data placed here will be
     *     freed by the caller using the standard free function.
     *   - Return an appropriate error (such as KRB5KDC_ERR_POLICY).
     */
    krb5_error_code (*check_policy_as)(krb5_context kcontext,
                                       krb5_kdc_req *request,
                                       krb5_db_entry *client,
                                       krb5_db_entry *server,
                                       krb5_timestamp kdc_time,
                                       const char **status,
                                       krb5_pa_data ***e_data);

/*
     * Optional: Perform a policy check on a TGS request, in addition to the
     * standard policy checks.  Return 0 if the TGS request is allowed.  If the
     * TGS request is not allowed:
     *   - Place a short string literal into *status.
     *   - If desired, place data into e_data.  Any data placed here will be
     *     freed by the caller using the standard free function.
     *   - Return an appropriate error (such as KRB5KDC_ERR_POLICY).
     * The input parameter ticket contains the TGT used in the TGS request.
     */
    krb5_error_code (*check_policy_tgs)(krb5_context kcontext,
                                        krb5_kdc_req *request,
                                        krb5_db_entry *server,
                                        krb5_ticket *ticket,
                                        const char **status,
                                        krb5_pa_data ***e_data);

/*
     * Optional: This method informs the module of a successful or unsuccessful
     * AS request.
     */
    void (*audit_as_req)(krb5_context kcontext, krb5_kdc_req *request,
                         const krb5_address *local_addr,
                         const krb5_address *remote_addr,
                         krb5_db_entry *client, krb5_db_entry *server,
                         krb5_timestamp authtime, krb5_error_code error_code);

/* Note: there is currently no method for auditing TGS requests. */

/*
     * Optional: This method informs the module of a request to reload
     * configuration or other state (that is, the KDC received a SIGHUP).
     */
    void (*refresh_config)(krb5_context kcontext);

/*
     * Optional: Perform a policy check on server being allowed to obtain
     * tickets from client to proxy.  (Note that proxy is the target of the
     * delegation, not the delegating service; the term "proxy" is from the
     * viewpoint of the delegating service asking another service to perform
     * some of its work in the authentication context of the client.  This
     * terminology comes from the Microsoft S4U protocol documentation.)
     * Return 0 if policy allows it, or an appropriate error (such as
     * KRB5KDC_ERR_POLICY) if not.  If this method is not implemented, all
     * S4U2Proxy delegation requests will be rejected.
     */
    krb5_error_code (*check_allowed_to_delegate)(krb5_context context,
                                                 krb5_const_principal client,
                                                 const krb5_db_entry *server,
                                                 krb5_const_principal proxy);

/*
     * Optional: Free the e_data pointer of a database entry.  If this method
     * is not implemented, the e_data pointer in principal entries will be
     * freed with free() as seen by libkdb5.
     */
    void (*free_principal_e_data)(krb5_context kcontext, krb5_octet *e_data);

/*
     * Optional: get a principal entry for S4U2Self based on X509 certificate.
     *
     * If flags include KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY, princ->realm
     * indicates the request realm, but the data components should be ignored.
     * The module can return an out-of-realm client referral as it would for
     * get_principal().
     *
     * If flags does not include KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY, princ is
     * from PA-S4U-X509-USER.  If it contains data components (and not just a
     * realm), the module should verify that it is the same as the lookup
     * result for client_cert.  The module should not return a referral.
     */
    krb5_error_code (*get_s4u_x509_principal)(krb5_context kcontext,
                                              const krb5_data *client_cert,
                                              krb5_const_principal princ,
                                              unsigned int flags,
                                              krb5_db_entry **entry_out);

/*
     * Optional: Perform a policy check on server being allowed to obtain
     * tickets from client to proxy.  This method is similar to
     * check_allowed_to_delegate, but it operates on the target server DB entry
     * (called "proxy" here as in Microsoft's protocol documentation) rather
     * than the intermediate server entry.  server_ad_info represents the
     * authdata of the intermediate server, as returned by the
     * get_authdata_info method on the header ticket.  Return 0 if policy
     * allows the delegation, or an appropriate error (such as
     * KRB5KDC_ERR_POLICY) if not.
     *
     * This method is called for S4U2Proxy requests and implements the
     * resource-based constrained delegation variant, which can support
     * cross-realm delegation.  If this method is not implemented or if it
     * returns a policy error, the KDC will fall back to
     * check_allowed_to_delegate if the intermediate and target servers are in
     * the same realm and the evidence ticket is forwardable.
     */
    krb5_error_code (*allowed_to_delegate_from)(krb5_context context,
                                                krb5_const_principal client,
                                                krb5_const_principal server,
                                                void *server_ad_info,
                                                const krb5_db_entry *proxy);

/*
     * Optional: Perform verification and policy checks on authorization data,
     * such as a Windows PAC, based on the request client lookup flags.  Return
     * 0 if all checks have passed.  Optionally return a representation of the
     * authdata in *ad_info_out, to be consumed by allowed_to_delegate_from and
     * sign_authdata.  Returning *ad_info_out is required to support
     * resource-based constrained delegation.
     *
     * If the KRB5_KDB_FLAG_CONSTRAINED_DELEGATION bit is set, a PAC must be
     * provided and verified, and an error should be returned if the client is
     * not allowed to delegate.  If the KRB5_KDB_FLAG_CROSS_REALM bit is also
     * set, set *client_out to the client name in the PAC; this indicates the
     * requested client principal for a cross-realm S4U2Proxy request.
     *
     * This method is called for TGS requests on the authorization data from
     * the header ticket.  For S4U2Proxy requests it is also called on the
     * authorization data from the evidence ticket.  If the
     * KRB5_KDB_FLAG_PROTOCOL_TRANSITION bit is set in flags, the authdata is
     * from the header ticket of an S4U2Self referral request, and the supplied
     * client_princ is the requested client.
     */
    krb5_error_code (*get_authdata_info)(krb5_context context,
                                         unsigned int flags,
                                         krb5_authdata **in_authdata,
                                         krb5_const_principal client_princ,
                                         krb5_const_principal server_princ,
                                         krb5_keyblock *server_key,
                                         krb5_keyblock *krbtgt_key,
                                         krb5_db_entry *krbtgt,
                                         krb5_timestamp authtime,
                                         void **ad_info_out,
                                         krb5_principal *client_out);

void (*free_authdata_info)(krb5_context context,
                               void *ad_info);

/* End of minor version 0 for major version 8. */
} kdb_vftabl;

#endif /* !defined(_WIN32) */

#endif /* KRB5_KDB5__ */

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