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
43 krb5_error_code KRB5_CALLCONV
krb5_c_init_state(krb5_context context,const krb5_keyblock * key,krb5_keyusage keyusage,krb5_data * new_state)44 krb5_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
62 krb5_error_code KRB5_CALLCONV
krb5_c_free_state(krb5_context context,const krb5_keyblock * key,krb5_data * state)63 krb5_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