1*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 2*7c478bd9Sstevel@tonic-gate /* 3*7c478bd9Sstevel@tonic-gate * lib/krb5/krb/gen_subkey.c 4*7c478bd9Sstevel@tonic-gate * 5*7c478bd9Sstevel@tonic-gate * Copyright 1991 by the Massachusetts Institute of Technology. 6*7c478bd9Sstevel@tonic-gate * All Rights Reserved. 7*7c478bd9Sstevel@tonic-gate * 8*7c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may 9*7c478bd9Sstevel@tonic-gate * require a specific license from the United States Government. 10*7c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating 11*7c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting. 12*7c478bd9Sstevel@tonic-gate * 13*7c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 14*7c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 15*7c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 16*7c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 17*7c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 18*7c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining 19*7c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 20*7c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label 21*7c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a 22*7c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software. 23*7c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of 24*7c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 25*7c478bd9Sstevel@tonic-gate * or implied warranty. 26*7c478bd9Sstevel@tonic-gate * 27*7c478bd9Sstevel@tonic-gate * 28*7c478bd9Sstevel@tonic-gate * Routine to automatically generate a subsession key based on an input key. 29*7c478bd9Sstevel@tonic-gate */ 30*7c478bd9Sstevel@tonic-gate 31*7c478bd9Sstevel@tonic-gate #include <k5-int.h> 32*7c478bd9Sstevel@tonic-gate 33*7c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 34*7c478bd9Sstevel@tonic-gate krb5_error_code 35*7c478bd9Sstevel@tonic-gate krb5_generate_subkey(context, key, subkey) 36*7c478bd9Sstevel@tonic-gate krb5_context context; 37*7c478bd9Sstevel@tonic-gate krb5_const krb5_keyblock *key; 38*7c478bd9Sstevel@tonic-gate krb5_keyblock **subkey; 39*7c478bd9Sstevel@tonic-gate { 40*7c478bd9Sstevel@tonic-gate krb5_error_code retval; 41*7c478bd9Sstevel@tonic-gate krb5_data seed; 42*7c478bd9Sstevel@tonic-gate 43*7c478bd9Sstevel@tonic-gate seed.length = key->length; 44*7c478bd9Sstevel@tonic-gate seed.data = (char *)key->contents; 45*7c478bd9Sstevel@tonic-gate if ((retval = krb5_c_random_seed(context, &seed))) 46*7c478bd9Sstevel@tonic-gate return(retval); 47*7c478bd9Sstevel@tonic-gate 48*7c478bd9Sstevel@tonic-gate if ((*subkey = (krb5_keyblock *) malloc(sizeof(krb5_keyblock))) == NULL) 49*7c478bd9Sstevel@tonic-gate return(ENOMEM); 50*7c478bd9Sstevel@tonic-gate 51*7c478bd9Sstevel@tonic-gate (void) memset(*subkey, 0, sizeof(krb5_keyblock)); 52*7c478bd9Sstevel@tonic-gate 53*7c478bd9Sstevel@tonic-gate if ((retval = krb5_c_make_random_key(context, key->enctype, *subkey))) { 54*7c478bd9Sstevel@tonic-gate krb5_xfree(*subkey); 55*7c478bd9Sstevel@tonic-gate return(retval); 56*7c478bd9Sstevel@tonic-gate } 57*7c478bd9Sstevel@tonic-gate 58*7c478bd9Sstevel@tonic-gate return(0); 59*7c478bd9Sstevel@tonic-gate } 60