1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/crypto/krb/decrypt_iov.c */
3 /*
4 * Copyright 2008 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 * or implied warranty.
25 */
26
27 #include "crypto_int.h"
28
29 krb5_error_code KRB5_CALLCONV
krb5_k_decrypt_iov(krb5_context context,krb5_key key,krb5_keyusage usage,const krb5_data * cipher_state,krb5_crypto_iov * data,size_t num_data)30 krb5_k_decrypt_iov(krb5_context context, krb5_key key, krb5_keyusage usage,
31 const krb5_data *cipher_state, krb5_crypto_iov *data,
32 size_t num_data)
33 {
34 const struct krb5_keytypes *ktp;
35
36 ktp = find_enctype(key->keyblock.enctype);
37 if (ktp == NULL)
38 return KRB5_BAD_ENCTYPE;
39
40 if (krb5int_c_locate_iov(data, num_data,
41 KRB5_CRYPTO_TYPE_STREAM) != NULL) {
42 return krb5int_c_iov_decrypt_stream(ktp, key, usage, cipher_state,
43 data, num_data);
44 }
45
46 return ktp->decrypt(ktp, key, usage, cipher_state, data, num_data);
47 }
48
49 krb5_error_code KRB5_CALLCONV
krb5_c_decrypt_iov(krb5_context context,const krb5_keyblock * keyblock,krb5_keyusage usage,const krb5_data * cipher_state,krb5_crypto_iov * data,size_t num_data)50 krb5_c_decrypt_iov(krb5_context context, const krb5_keyblock *keyblock,
51 krb5_keyusage usage, const krb5_data *cipher_state,
52 krb5_crypto_iov *data, size_t num_data)
53 {
54 krb5_key key;
55 krb5_error_code ret;
56
57 ret = krb5_k_create_key(context, keyblock, &key);
58 if (ret != 0)
59 return ret;
60 ret = krb5_k_decrypt_iov(context, key, usage, cipher_state, data,
61 num_data);
62 krb5_k_free_key(context, key);
63 return ret;
64 }
65