17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * lib/krb5/krb/gen_subkey.c
37c478bd9Sstevel@tonic-gate *
4*159d09a2SMark Phalan * Copyright 1991, 2002 by the Massachusetts Institute of Technology.
57c478bd9Sstevel@tonic-gate * All Rights Reserved.
67c478bd9Sstevel@tonic-gate *
77c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may
87c478bd9Sstevel@tonic-gate * require a specific license from the United States Government.
97c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating
107c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting.
117c478bd9Sstevel@tonic-gate *
127c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
137c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and
147c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright
157c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and
167c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that
177c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining
187c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior
197c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label
207c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a
217c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software.
227c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of
237c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express
247c478bd9Sstevel@tonic-gate * or implied warranty.
257c478bd9Sstevel@tonic-gate *
267c478bd9Sstevel@tonic-gate *
277c478bd9Sstevel@tonic-gate * Routine to automatically generate a subsession key based on an input key.
287c478bd9Sstevel@tonic-gate */
297c478bd9Sstevel@tonic-gate
30*159d09a2SMark Phalan #include "k5-int.h"
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate /*ARGSUSED*/
337c478bd9Sstevel@tonic-gate krb5_error_code
krb5_generate_subkey(krb5_context context,const krb5_keyblock * key,krb5_keyblock ** subkey)34505d05c7Sgtb krb5_generate_subkey(krb5_context context, const krb5_keyblock *key, krb5_keyblock **subkey)
357c478bd9Sstevel@tonic-gate {
367c478bd9Sstevel@tonic-gate krb5_error_code retval;
37505d05c7Sgtb
38505d05c7Sgtb #if 0
39505d05c7Sgtb /*
40505d05c7Sgtb * Solaris Kerberos: Don't bother with this PRNG stuff,
41505d05c7Sgtb * we have /dev/random and PKCS#11 to handle Random Numbers.
42505d05c7Sgtb */
43505d05c7Sgtb
447c478bd9Sstevel@tonic-gate krb5_data seed;
457c478bd9Sstevel@tonic-gate
467c478bd9Sstevel@tonic-gate seed.length = key->length;
47*159d09a2SMark Phalan seed.data = key->contents;
48505d05c7Sgtb if ((retval = krb5_c_random_add_entropy(context, KRB5_C_RANDSOURCE_TRUSTEDPARTY, &seed)))
497c478bd9Sstevel@tonic-gate return(retval);
50505d05c7Sgtb #endif /* 0 */
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate if ((*subkey = (krb5_keyblock *) malloc(sizeof(krb5_keyblock))) == NULL)
537c478bd9Sstevel@tonic-gate return(ENOMEM);
547c478bd9Sstevel@tonic-gate
55*159d09a2SMark Phalan /* Solaris Kerberos */
567c478bd9Sstevel@tonic-gate (void) memset(*subkey, 0, sizeof(krb5_keyblock));
577c478bd9Sstevel@tonic-gate
587c478bd9Sstevel@tonic-gate if ((retval = krb5_c_make_random_key(context, key->enctype, *subkey))) {
597c478bd9Sstevel@tonic-gate krb5_xfree(*subkey);
607c478bd9Sstevel@tonic-gate return(retval);
617c478bd9Sstevel@tonic-gate }
627c478bd9Sstevel@tonic-gate
637c478bd9Sstevel@tonic-gate return(0);
647c478bd9Sstevel@tonic-gate }
65