1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * Copyright (C) 2001 by the Massachusetts Institute of Technology. 9 * All rights reserved. 10 * 11 * Export of this software from the United States of America may 12 * require a specific license from the United States Government. 13 * It is the responsibility of any person or organization contemplating 14 * export to obtain such a license before exporting. 15 * 16 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 17 * distribute this software and its documentation for any purpose and 18 * without fee is hereby granted, provided that the above copyright 19 * notice appear in all copies and that both that copyright notice and 20 * this permission notice appear in supporting documentation, and that 21 * the name of M.I.T. not be used in advertising or publicity pertaining 22 * to distribution of the software without specific, written prior 23 * permission. Furthermore if you modify this software you must label 24 * your software as modified software and not distribute it in such a 25 * fashion that it might be confused with the original M.I.T. software. 26 * M.I.T. makes no representations about the suitability of 27 * this software for any purpose. It is provided "as is" without express 28 * or implied warranty. 29 * 30 * Section 6 (Encryption) of the Kerberos revisions document defines 31 * cipher states to be used to chain encryptions and decryptions 32 * together. Examples of cipher states include initialization vectors 33 * for CBC encription. Most Kerberos encryption systems can share 34 * code for initializing and freeing cipher states. This file 35 * contains that default code. 36 */ 37 38 #include "k5-int.h" 39 40 /* ARGSUSED */ 41 krb5_error_code krb5int_des_init_state 42 (krb5_context context, const krb5_keyblock *key, 43 krb5_keyusage usage, krb5_data *new_state ) 44 { 45 new_state->length = 8; 46 new_state->data = (void *) MALLOC(8); 47 if (new_state->data) { 48 /* Solaris Kerberos */ 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 /* Solaris Kerberos */ 53 (void) memcpy (new_state->data, key->contents, new_state->length); 54 } 55 } else { 56 return ENOMEM; 57 } 58 return 0; 59 } 60 61 /* ARGSUSED */ 62 krb5_error_code krb5int_default_free_state 63 (krb5_context context, krb5_data *state) 64 { 65 if (state->data) { 66 FREE (state->data, state->length); 67 state-> data = NULL; 68 state->length = 0; 69 } 70 return 0; 71 } 72 73 74 75