/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/krb/int-proto.h - Prototypes for libkrb5 internal functions */
/*
 * Copyright 1990,1991 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.
 */

#ifndef KRB5_INT_FUNC_PROTO__
#define KRB5_INT_FUNC_PROTO__

krb5_error_code
krb5int_tgtname(krb5_context context, const krb5_data *, const krb5_data *,
                krb5_principal *);

krb5_error_code
krb5int_libdefault_boolean(krb5_context, const krb5_data *, const char *,
                           int *);
krb5_error_code
krb5int_libdefault_string(krb5_context context, const krb5_data *realm,
                          const char *option, char **ret_value);


krb5_error_code krb5_ser_authdata_init (krb5_context);
krb5_error_code krb5_ser_address_init (krb5_context);
krb5_error_code krb5_ser_authenticator_init (krb5_context);
krb5_error_code krb5_ser_checksum_init (krb5_context);
krb5_error_code krb5_ser_keyblock_init (krb5_context);
krb5_error_code krb5_ser_principal_init (krb5_context);
krb5_error_code krb5_ser_authdata_context_init (krb5_context);

krb5_error_code
krb5_preauth_supply_preauth_data(krb5_context context,
                                 krb5_gic_opt_ext *opte,
                                 const char *attr,
                                 const char *value);

krb5_error_code
clpreauth_encrypted_challenge_initvt(krb5_context context, int maj_ver,
                                     int min_ver, krb5_plugin_vtable vtable);

krb5_error_code
clpreauth_encrypted_timestamp_initvt(krb5_context context, int maj_ver,
                                     int min_ver, krb5_plugin_vtable vtable);

krb5_error_code
krb5int_construct_matching_creds(krb5_context context, krb5_flags options,
                                 krb5_creds *in_creds, krb5_creds *mcreds,
                                 krb5_flags *fields);

#define in_clock_skew(date, now) (labs((date)-(now)) < context->clockskew)

#define IS_TGS_PRINC(c, p)                                              \
    (krb5_princ_size((c), (p)) == 2 &&                                  \
     data_eq_string(*krb5_princ_component((c), (p), 0), KRB5_TGS_NAME))

krb5_error_code
krb5_get_cred_via_tkt_ext (krb5_context context, krb5_creds *tkt,
                           krb5_flags kdcoptions, krb5_address *const *address,
                           krb5_pa_data **in_padata,
                           krb5_creds *in_cred,
                           krb5_error_code (*gcvt_fct)(krb5_context,
                                                       krb5_keyblock *,
                                                       krb5_kdc_req *,
                                                       void *),
                           void *gcvt_data,
                           krb5_pa_data ***out_padata,
                           krb5_pa_data ***enc_padata,
                           krb5_creds **out_cred,
                           krb5_keyblock **out_subkey);

krb5_error_code
krb5int_make_tgs_request_ext(krb5_context context,
                             krb5_flags kdcoptions,
                             const krb5_ticket_times *timestruct,
                             const krb5_enctype *ktypes,
                             krb5_const_principal sname,
                             krb5_address *const *addrs,
                             krb5_authdata *const *authorization_data,
                             krb5_pa_data *const *padata,
                             const krb5_data *second_ticket,
                             krb5_creds *in_cred,
                             krb5_error_code (*pacb_fct)(krb5_context,
                                                         krb5_keyblock *,
                                                         krb5_kdc_req *,
                                                         void *),
                             void *pacb_data,
                             krb5_data *request_data,
                             krb5_timestamp *timestamp,
                             krb5_int32 *nonce,
                             krb5_keyblock **subkey);

krb5_error_code
krb5int_make_tgs_request(krb5_context context,
                         krb5_creds *tkt,
                         krb5_flags kdcoptions,
                         krb5_address *const *address,
                         krb5_pa_data **in_padata,
                         krb5_creds *in_cred,
                         krb5_error_code (*pacb_fct)(krb5_context,
                                                     krb5_keyblock *,
                                                     krb5_kdc_req *,
                                                     void *),
                         void *pacb_data,
                         krb5_data *request_data,
                         krb5_timestamp *timestamp,
                         krb5_int32 *nonce,
                         krb5_keyblock **subkey);

krb5_error_code
krb5int_process_tgs_reply(krb5_context context,
                          krb5_data *response_data,
                          krb5_creds *tkt,
                          krb5_flags kdcoptions,
                          krb5_address *const *address,
                          krb5_pa_data **in_padata,
                          krb5_creds *in_cred,
                          krb5_timestamp timestamp,
                          krb5_int32 nonce,
                          krb5_keyblock *subkey,
                          krb5_pa_data ***out_padata,
                          krb5_pa_data ***out_enc_padata,
                          krb5_creds **out_cred);

/* The subkey field is an output parameter; if a
 * tgs-rep is received then the subkey will be filled
 * in with the subkey needed to decrypt the TGS
 * response. Otherwise it will be set to null.
 */
krb5_error_code krb5int_decode_tgs_rep(krb5_context, krb5_data *,
                                       const krb5_keyblock *, krb5_keyusage,
                                       krb5_kdc_rep ** );

/* Utility functions for zero-terminated enctype lists. */
size_t krb5int_count_etypes(const krb5_enctype *list);
krb5_error_code krb5int_copy_etypes(const krb5_enctype *old_list,
                                    krb5_enctype **new_list);

krb5_error_code
krb5int_validate_times(krb5_context, krb5_ticket_times *);

krb5_error_code
krb5int_copy_authdatum(krb5_context, const krb5_authdata *, krb5_authdata **);

krb5_boolean
k5_privsafe_check_seqnum(krb5_context ctx, krb5_auth_context ac,
                         krb5_ui_4 in_seq);

krb5_error_code
k5_privsafe_check_addrs(krb5_context context, krb5_auth_context ac,
                        krb5_address *msg_s_addr, krb5_address *msg_r_addr);

krb5_error_code
krb5int_mk_chpw_req(krb5_context context, krb5_auth_context auth_context,
                    krb5_data *ap_req, char *passwd, krb5_data *packet);

krb5_error_code
krb5int_rd_chpw_rep(krb5_context context, krb5_auth_context auth_context,
                    krb5_data *packet, int *result_code,
                    krb5_data *result_data);

krb5_error_code KRB5_CALLCONV
krb5_chpw_result_code_string(krb5_context context, int result_code,
                             char **result_codestr);

krb5_error_code
krb5int_mk_setpw_req(krb5_context context, krb5_auth_context auth_context,
                     krb5_data *ap_req, krb5_principal targetprinc,
                     char *passwd, krb5_data *packet);

void
k5_ccselect_free_context(krb5_context context);

#endif /* KRB5_INT_FUNC_PROTO__ */
