1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/krb5/krb/gen_subkey.c - Generate a subsession key based on input key */
4 * Copyright 1991, 2002 by the Massachusetts Institute of Technology.
7 * Export of this software from the United States of America may
8 * require a specific license from the United States Government.
9 * It is the responsibility of any person or organization contemplating
10 * export to obtain such a license before exporting.
12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13 * distribute this software and its documentation for any purpose and
14 * without fee is hereby granted, provided that the above copyright
15 * notice appear in all copies and that both that copyright notice and
16 * this permission notice appear in supporting documentation, and that
17 * the name of M.I.T. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission. Furthermore if you modify this software you must label
20 * your software as modified software and not distribute it in such a
21 * fashion that it might be confused with the original M.I.T. software.
22 * M.I.T. makes no representations about the suitability of
23 * this software for any purpose. It is provided "as is" without express
24 * or implied warranty.
29 static inline krb5_data
30 key2data (krb5_keyblock k)
35 d.data = (char *) k.contents;
40 krb5_generate_subkey_extended(krb5_context context,
41 const krb5_keyblock *key,
43 krb5_keyblock **subkey)
45 krb5_error_code retval;
47 krb5_keyblock *keyblock;
51 seed = key2data(*key);
52 retval = krb5_c_random_add_entropy(context, KRB5_C_RANDSOURCE_TRUSTEDPARTY,
57 keyblock = malloc(sizeof(krb5_keyblock));
61 retval = krb5_c_make_random_key(context, enctype, keyblock);
72 krb5_generate_subkey(krb5_context context, const krb5_keyblock *key, krb5_keyblock **subkey)
74 return krb5_generate_subkey_extended(context, key, key->enctype, subkey);