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      1 /*
      2  * Copyright 2019-2021 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 /* Dispatch functions for cast cipher modes ecb, cbc, ofb, cfb */
     17 
     18 #include <openssl/proverr.h>
     19 #include "cipher_cast.h"
     20 #include "prov/implementations.h"
     21 #include "prov/providercommon.h"
     22 
     23 #define CAST5_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH
     24 
     25 static OSSL_FUNC_cipher_freectx_fn cast5_freectx;
     26 static OSSL_FUNC_cipher_dupctx_fn cast5_dupctx;
     27 
     28 static void cast5_freectx(void *vctx)
     29 {
     30     PROV_CAST_CTX *ctx = (PROV_CAST_CTX *)vctx;
     31 
     32     ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
     33     OPENSSL_clear_free(ctx, sizeof(*ctx));
     34 }
     35 
     36 static void *cast5_dupctx(void *ctx)
     37 {
     38     PROV_CAST_CTX *in = (PROV_CAST_CTX *)ctx;
     39     PROV_CAST_CTX *ret;
     40 
     41     if (!ossl_prov_is_running())
     42         return NULL;
     43 
     44     ret = OPENSSL_malloc(sizeof(*ret));
     45     if (ret == NULL)
     46         return NULL;
     47     *ret = *in;
     48 
     49     return ret;
     50 }
     51 
     52 /* ossl_cast5128ecb_functions */
     53 IMPLEMENT_var_keylen_cipher(cast5, CAST, ecb, ECB, CAST5_FLAGS, 128, 64, 0, block)
     54 /* ossl_cast5128cbc_functions */
     55 IMPLEMENT_var_keylen_cipher(cast5, CAST, cbc, CBC, CAST5_FLAGS, 128, 64, 64, block)
     56 /* ossl_cast5128ofb64_functions */
     57 IMPLEMENT_var_keylen_cipher(cast5, CAST, ofb64, OFB, CAST5_FLAGS, 128, 8, 64, stream)
     58 /* ossl_cast5128cfb64_functions */
     59 IMPLEMENT_var_keylen_cipher(cast5, CAST, cfb64, CFB, CAST5_FLAGS, 128, 8, 64, stream)
     60