1 /* 2 * lib/krb5/krb/gen_subkey.c 3 * 4 * Copyright 1991, 2002 by the Massachusetts Institute of Technology. 5 * All Rights Reserved. 6 * 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. 11 * 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. 25 * 26 * 27 * Routine to automatically generate a subsession key based on an input key. 28 */ 29 30 #include "k5-int.h" 31 32 /*ARGSUSED*/ 33 krb5_error_code 34 krb5_generate_subkey(krb5_context context, const krb5_keyblock *key, krb5_keyblock **subkey) 35 { 36 krb5_error_code retval; 37 38 #if 0 39 /* 40 * Solaris Kerberos: Don't bother with this PRNG stuff, 41 * we have /dev/random and PKCS#11 to handle Random Numbers. 42 */ 43 44 krb5_data seed; 45 46 seed.length = key->length; 47 seed.data = key->contents; 48 if ((retval = krb5_c_random_add_entropy(context, KRB5_C_RANDSOURCE_TRUSTEDPARTY, &seed))) 49 return(retval); 50 #endif /* 0 */ 51 52 if ((*subkey = (krb5_keyblock *) malloc(sizeof(krb5_keyblock))) == NULL) 53 return(ENOMEM); 54 55 /* Solaris Kerberos */ 56 (void) memset(*subkey, 0, sizeof(krb5_keyblock)); 57 58 if ((retval = krb5_c_make_random_key(context, key->enctype, *subkey))) { 59 krb5_xfree(*subkey); 60 return(retval); 61 } 62 63 return(0); 64 } 65