1 /* 2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 #pragma ident "%Z%%M% %I% %E% SMI" 7 8 /* 9 * Copyright (C) 2001 by the Massachusetts Institute of Technology. 10 * All rights reserved. 11 * 12 * Export of this software from the United States of America may 13 * require a specific license from the United States Government. 14 * It is the responsibility of any person or organization contemplating 15 * export to obtain such a license before exporting. 16 * 17 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 18 * distribute this software and its documentation for any purpose and 19 * without fee is hereby granted, provided that the above copyright 20 * notice appear in all copies and that both that copyright notice and 21 * this permission notice appear in supporting documentation, and that 22 * the name of M.I.T. not be used in advertising or publicity pertaining 23 * to distribution of the software without specific, written prior 24 * permission. Furthermore if you modify this software you must label 25 * your software as modified software and not distribute it in such a 26 * fashion that it might be confused with the original M.I.T. software. 27 * M.I.T. makes no representations about the suitability of 28 * this software for any purpose. It is provided "as is" without express 29 * or implied warranty. 30 * 31 * Section 6 (Encryption) of the Kerberos revisions document defines 32 * cipher states to be used to chain encryptions and decryptions 33 * together. Examples of cipher states include initialization vectors 34 * for CBC encription. Most Kerberos encryption systems can share 35 * code for initializing and freeing cipher states. This file 36 * contains that default code. 37 */ 38 39 #include <k5-int.h> 40 41 /* ARGSUSED */ 42 krb5_error_code krb5int_des_init_state( 43 krb5_context context, const krb5_keyblock *key, 44 krb5_keyusage usage, krb5_data *new_state ) 45 { 46 new_state->length = 8; 47 new_state->data = (void *) MALLOC(8); 48 if (new_state->data) { 49 (void) memset (new_state->data, 0, new_state->length); 50 /* We need to copy in the key for des-cbc-cr--ick, but that's how it works*/ 51 if (key->enctype == ENCTYPE_DES_CBC_CRC) { 52 (void) memcpy (new_state->data, key->contents, new_state->length); 53 } 54 } else { 55 return ENOMEM; 56 } 57 return 0; 58 } 59 60 /* ARGSUSED */ 61 krb5_error_code krb5int_default_free_state( 62 krb5_context context, krb5_data *state) 63 { 64 if (state->data) { 65 FREE (state->data, state->length); 66 state-> data = NULL; 67 state->length = 0; 68 } 69 return 0; 70 } 71 72