1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/*
11 * CAST low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14#include "internal/deprecated.h"
15
16#include <stdio.h>
17#include "internal/cryptlib.h"
18
19#ifndef OPENSSL_NO_CAST
20# include <openssl/evp.h>
21# include <openssl/objects.h>
22# include "crypto/evp.h"
23# include <openssl/cast.h>
24# include "evp_local.h"
25
26static int cast_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
27                         const unsigned char *iv, int enc);
28
29typedef struct {
30    CAST_KEY ks;
31} EVP_CAST_KEY;
32
33# define data(ctx)       EVP_C_DATA(EVP_CAST_KEY,ctx)
34
35IMPLEMENT_BLOCK_CIPHER(cast5, ks, CAST, EVP_CAST_KEY,
36                       NID_cast5, 8, CAST_KEY_LENGTH, 8, 64,
37                       EVP_CIPH_VARIABLE_LENGTH, cast_init_key, NULL,
38                       EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
39
40static int cast_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
41                         const unsigned char *iv, int enc)
42{
43    int keylen = EVP_CIPHER_CTX_get_key_length(ctx);
44
45    if (keylen <= 0)
46        return 0;
47    CAST_set_key(&data(ctx)->ks, keylen, key);
48    return 1;
49}
50
51#endif
52