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/*
* lib/krb5/ccache/stdio/scc_nseq.c
*
* Copyright 1990,1991 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. 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.
*
*
* This file contains the source code for krb5_scc_next_cred.
*/
#include "scc.h"
/*
* Requires:
* cursor is a krb5_cc_cursor originally obtained from
* krb5_scc_start_seq_get.
*
* Modifes:
* cursor, creds
*
* Effects:
* Fills in creds with the "next" credentals structure from the cache
* id. The actual order the creds are returned in is arbitrary.
* Space is allocated for the variable length fields in the
* credentials structure, so the object returned must be passed to
* krb5_destroy_credential.
*
* The cursor is updated for the next call to krb5_scc_next_cred.
*
* Errors:
* system errors
*/
krb5_error_code
krb5_scc_next_cred(context, id, cursor, creds)
krb5_context context;
krb5_ccache id;
krb5_cc_cursor *cursor;
krb5_creds *creds;
{
#define TCHECK(ret) if (ret != KRB5_OK) goto lose;
int ret;
krb5_error_code kret;
krb5_scc_cursor *fcursor;
krb5_int32 int32;
krb5_octet octet;
#define Z(field) creds->field = 0
Z (client);
Z (server);
Z (keyblock.contents);
Z (authdata);
Z (ticket.data);
Z (second_ticket.data);
Z (addresses);
#undef Z
MAYBE_OPEN (context, id, SCC_OPEN_RDONLY);
fcursor = (krb5_scc_cursor *) *cursor;
ret = fseek(((krb5_scc_data *) id->data)->file, fcursor->pos, 0);
if (ret < 0) {
ret = krb5_scc_interpret(context, errno);
MAYBE_CLOSE (context, id, ret);
return ret;
}
kret = krb5_scc_read_principal(context, id, &creds->client);
TCHECK(kret);
kret = krb5_scc_read_principal(context, id, &creds->server);
TCHECK(kret);
kret = krb5_scc_read_keyblock(context, id, &creds->keyblock);
TCHECK(kret);
kret = krb5_scc_read_times(context, id, &creds->times);
TCHECK(kret);
kret = krb5_scc_read_octet(context, id, &octet);
TCHECK(kret);
creds->is_skey = octet;
kret = krb5_scc_read_int32(context, id, &int32);
TCHECK(kret);
creds->ticket_flags = int32;
kret = krb5_scc_read_addrs(context, id, &creds->addresses);
TCHECK(kret);
kret = krb5_scc_read_authdata (context, id, &creds->authdata);
TCHECK (kret);
kret = krb5_scc_read_data(context, id, &creds->ticket);
TCHECK(kret);
kret = krb5_scc_read_data(context, id, &creds->second_ticket);
TCHECK(kret);
fcursor->pos = ftell(((krb5_scc_data *) id->data)->file);
cursor = (krb5_cc_cursor *) fcursor;
lose:
if (kret != KRB5_OK) {
krb5_free_cred_contents(context, creds);
}
MAYBE_CLOSE (context, id, kret);
return kret;
}
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