providers/implementations/ciphers/cipher_cast5.c

   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         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  47         return NULL;
  48     }
  49     *ret = *in;
  50
  51     return ret;
  52 }
  53
  54 /* ossl_cast5128ecb_functions */
  55 IMPLEMENT_var_keylen_cipher(cast5, CAST, ecb, ECB, CAST5_FLAGS, 128, 64, 0, block)
  56 /* ossl_cast5128cbc_functions */
  57 IMPLEMENT_var_keylen_cipher(cast5, CAST, cbc, CBC, CAST5_FLAGS, 128, 64, 64, block)
  58 /* ossl_cast5128ofb64_functions */
  59 IMPLEMENT_var_keylen_cipher(cast5, CAST, ofb64, OFB, CAST5_FLAGS, 128, 8, 64, stream)
  60 /* ossl_cast5128cfb64_functions */
  61 IMPLEMENT_var_keylen_cipher(cast5, CAST, cfb64,  CFB, CAST5_FLAGS, 128, 8, 64, stream)