1/*
2 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
3 * Use is subject to license terms.
4 */
5
6/*
7 * lib/crypto/state.c
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
30 *
31 *
32 *
33 *  * Section 6 (Encryption) of the Kerberos revisions document defines
34 * cipher states to be used to chain encryptions and decryptions
35 * together.  Examples of cipher states include initialization vectors
36 * for CBC encription.    This file contains implementations of
37 * krb5_c_init_state and krb5_c_free_state used by clients of the
38 * Kerberos crypto library.
39 */
40#include "k5-int.h"
41#include "etypes.h"
42
43krb5_error_code KRB5_CALLCONV
44krb5_c_init_state (krb5_context context, const krb5_keyblock *key,
45		   krb5_keyusage keyusage, krb5_data *new_state)
46{
47      int i;
48
49    for (i=0; i<krb5_enctypes_length; i++) {
50	if (krb5_enctypes_list[i].etype == key->enctype)
51	    break;
52    }
53
54    if (i == krb5_enctypes_length)
55	return(KRB5_BAD_ENCTYPE);
56
57    /* Solaris Kerberos */
58    return (*(krb5_enctypes_list[i].enc->init_state))
59      (context, key, keyusage, new_state);
60}
61
62krb5_error_code KRB5_CALLCONV
63krb5_c_free_state (krb5_context context, const krb5_keyblock *key,
64		   krb5_data *state)
65{
66      int i;
67
68    for (i=0; i<krb5_enctypes_length; i++) {
69	if (krb5_enctypes_list[i].etype == key->enctype)
70	    break;
71    }
72
73    if (i == krb5_enctypes_length)
74	return(KRB5_BAD_ENCTYPE);
75
76    /* Solaris Kerberos */
77    return     (*(krb5_enctypes_list[i].enc->free_state))
78      (context, state);
79}
80