xref: /openssl/crypto/evp/e_cast.c (revision ed576acd)
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