1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ 2 /* lib/crypto/krb/state.c */ 3 /* 4 * Copyright (C) 2001 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 25 * 26 * 27 * 28 * * Section 6 (Encryption) of the Kerberos revisions document defines 29 * cipher states to be used to chain encryptions and decryptions 30 * together. Examples of cipher states include initialization vectors 31 * for CBC encription. This file contains implementations of 32 * krb5_c_init_state and krb5_c_free_state used by clients of the 33 * Kerberos crypto library. 34 */ 35 #include "crypto_int.h" 36 37 krb5_error_code KRB5_CALLCONV 38 krb5_c_init_state (krb5_context context, const krb5_keyblock *key, 39 krb5_keyusage keyusage, krb5_data *new_state) 40 { 41 const struct krb5_keytypes *ktp; 42 43 ktp = find_enctype(key->enctype); 44 if (ktp == NULL) 45 return KRB5_BAD_ENCTYPE; 46 return ktp->enc->init_state(key, keyusage, new_state); 47 } 48 49 krb5_error_code KRB5_CALLCONV 50 krb5_c_free_state(krb5_context context, const krb5_keyblock *key, 51 krb5_data *state) 52 { 53 const struct krb5_keytypes *ktp; 54 55 ktp = find_enctype(key->enctype); 56 if (ktp == NULL) 57 return KRB5_BAD_ENCTYPE; 58 ktp->enc->free_state(state); 59 return 0; 60 } 61