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/*
* lib/kadm/adm_kt_dec.c
*
* Copyright 1995 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.
*
*/
/*
* adm_kt_dec.c - Decode keytab entry according to protocol.
*/
#include "k5-int.h"
#include "adm.h"
#include "adm_proto.h"
/*
* krb5_adm_proto_to_ktent() - Convert a list of reply components to
* a keytab entry according to procotol.
*
* Successful callers of this routine should free ktentp->principal
* and ktentp->key.contents.
*/
krb5_error_code
krb5_adm_proto_to_ktent(kcontext, ncomp, complist, ktentp)
krb5_context kcontext;
krb5_int32 ncomp;
krb5_data *complist;
krb5_keytab_entry *ktentp;
{
krb5_error_code kret;
char *v;
/*
* Clear out the keytab entry.
*/
memset((char *) ktentp, 0, sizeof(krb5_keytab_entry));
/*
* Figure out how many components we have. We expect KRB5_ADM_KT_NCOMPS
* components.
*/
if (ncomp != KRB5_ADM_KT_NCOMPS)
return(EINVAL);
/* Parse the supplied principal name */
if (kret = krb5_parse_name(kcontext,
complist[KRB5_ADM_KT_PRINCIPAL].data,
&ktentp->principal))
goto done;
/* Parse the supplied timestamp */
if (complist[KRB5_ADM_KT_TIMESTAMP].length < sizeof(krb5_timestamp)) {
kret = EINVAL;
goto done;
}
v = complist[KRB5_ADM_KT_TIMESTAMP].data;
ktentp->timestamp = (krb5_timestamp)
(((krb5_int32) ((unsigned char) v[0]) << 24) +
((krb5_int32) ((unsigned char) v[1]) << 16) +
((krb5_int32) ((unsigned char) v[2]) << 8) +
((krb5_int32) ((unsigned char) v[3])));
/* Parse the supplied vno */
if (complist[KRB5_ADM_KT_VNO].length < sizeof(krb5_kvno)) {
kret = EINVAL;
goto done;
}
v = complist[KRB5_ADM_KT_VNO].data;
ktentp->vno = (krb5_kvno)
(((krb5_int32) ((unsigned char) v[0]) << 24) +
((krb5_int32) ((unsigned char) v[1]) << 16) +
((krb5_int32) ((unsigned char) v[2]) << 8) +
((krb5_int32) ((unsigned char) v[3])));
/* Parse the supplied key_enctype */
if (complist[KRB5_ADM_KT_KEY_ENCTYPE].length < sizeof(krb5_enctype)) {
kret = EINVAL;
goto done;
}
v = complist[KRB5_ADM_KT_KEY_ENCTYPE].data;
ktentp->key.enctype = (krb5_enctype)
(((krb5_int32) ((unsigned char) v[0]) << 24) +
((krb5_int32) ((unsigned char) v[1]) << 16) +
((krb5_int32) ((unsigned char) v[2]) << 8) +
((krb5_int32) ((unsigned char) v[3])));
/* Finally, shuck the key contents */
if (ktentp->key.contents = (krb5_octet *)
malloc((size_t) complist[KRB5_ADM_KT_KEY_KEY].length)) {
ktentp->key.length = complist[KRB5_ADM_KT_KEY_KEY].length;
memcpy(ktentp->key.contents,
complist[KRB5_ADM_KT_KEY_KEY].data,
(size_t) ktentp->key.length);
kret = 0;
}
else
kret = ENOMEM;
done:
if (kret) {
if (ktentp->principal)
krb5_free_principal(kcontext, ktentp->principal);
if (ktentp->key.contents) {
memset((char *) ktentp->key.contents, 0,
(size_t) ktentp->key.length);
krb5_xfree(ktentp->key.contents);
}
memset((char *) ktentp, 0, sizeof(krb5_keytab_entry));
}
return(kret);
}
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