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
26 static int cast_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
27 const unsigned char *iv, int enc);
28
29 typedef struct {
30 CAST_KEY ks;
31 } EVP_CAST_KEY;
32
33 # define data(ctx) EVP_C_DATA(EVP_CAST_KEY,ctx)
34
35 IMPLEMENT_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
cast_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)40 static 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