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/*
* lib/krb5/keytab/file/kts_g_ent.c
*
* Copyright 1990 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 is the get_entry routine for the file based keytab implementation.
* It opens the keytab file, and either retrieves the entry or returns
* an error.
*/
#include "k5-int.h"
#include "ktsrvtab.h"
krb5_error_code KRB5_CALLCONV
krb5_ktsrvtab_get_entry(context, id, principal, kvno, enctype, entry)
krb5_context context;
krb5_keytab id;
krb5_principal principal;
krb5_kvno kvno;
krb5_enctype enctype;
krb5_keytab_entry * entry;
{
krb5_keytab_entry best_entry, ent;
krb5_error_code kerror = 0;
int found_wrong_kvno = 0;
/* Open the srvtab. */
if ((kerror = krb5_ktsrvint_open(context, id)))
return(kerror);
/* srvtab files only have DES_CBC_CRC keys. */
switch (enctype) {
case ENCTYPE_DES_CBC_CRC:
case ENCTYPE_DES_CBC_MD5:
case ENCTYPE_DES_CBC_MD4:
case ENCTYPE_DES_CBC_RAW:
case IGNORE_ENCTYPE:
break;
default:
return KRB5_KT_NOTFOUND;
}
best_entry.principal = 0;
best_entry.vno = 0;
best_entry.key.contents = 0;
while ((kerror = krb5_ktsrvint_read_entry(context, id, &ent)) == 0) {
if (krb5_principal_compare(context, principal, ent.principal)) {
if (kvno == IGNORE_VNO) {
if (!best_entry.principal || (best_entry.vno < ent.vno)) {
krb5_kt_free_entry(context, &best_entry);
best_entry = ent;
}
} else {
if (ent.vno == kvno) {
best_entry = ent;
break;
} else {
found_wrong_kvno = 1;
}
}
} else {
krb5_kt_free_entry(context, &ent);
}
}
if (kerror == KRB5_KT_END) {
if (best_entry.principal)
kerror = 0;
else if (found_wrong_kvno)
kerror = KRB5_KT_KVNONOTFOUND;
else
kerror = KRB5_KT_NOTFOUND;
}
if (kerror) {
(void) krb5_ktsrvint_close(context, id);
krb5_kt_free_entry(context, &best_entry);
return kerror;
}
if ((kerror = krb5_ktsrvint_close(context, id)) != 0) {
krb5_kt_free_entry(context, &best_entry);
return kerror;
}
*entry = best_entry;
return 0;
}
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