providers/implementations/ciphers/cipher_blowfish.c

   1 /*
   2  * Copyright 2019-2020 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 /* Dispatch functions for Blowfish cipher modes ecb, cbc, ofb, cfb */
  11
  12 /*
  13  * BF low level APIs are deprecated for public use, but still ok for internal
  14  * use.
  15  */
  16 #include "internal/deprecated.h"
  17
  18 #include "cipher_blowfish.h"
  19 #include "prov/implementations.h"
  20 #include "prov/providercommon.h"
  21
  22 #define BF_FLAGS (EVP_CIPH_VARIABLE_LENGTH)
  23
  24 static OSSL_FUNC_cipher_freectx_fn blowfish_freectx;
  25 static OSSL_FUNC_cipher_dupctx_fn blowfish_dupctx;
  26
  27 static void blowfish_freectx(void *vctx)
  28 {
  29     PROV_BLOWFISH_CTX *ctx = (PROV_BLOWFISH_CTX *)vctx;
  30
  31     ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
  32     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  33 }
  34
  35 static void *blowfish_dupctx(void *ctx)
  36 {
  37     PROV_BLOWFISH_CTX *in = (PROV_BLOWFISH_CTX *)ctx;
  38     PROV_BLOWFISH_CTX *ret;
  39
  40     if (!ossl_prov_is_running())
  41         return NULL;
  42
  43     ret = OPENSSL_malloc(sizeof(*ret));
  44     if (ret == NULL) {
  45         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  46         return NULL;
  47     }
  48     *ret = *in;
  49
  50     return ret;
  51 }
  52
  53 /* bf_ecb_functions */
  54 IMPLEMENT_var_keylen_cipher(blowfish, BLOWFISH, ecb, ECB, BF_FLAGS, 128, 64, 0, block)
  55 /* bf_cbc_functions */
  56 IMPLEMENT_var_keylen_cipher(blowfish, BLOWFISH, cbc, CBC, BF_FLAGS, 128, 64, 64, block)
  57 /* bf_ofb_functions */
  58 IMPLEMENT_var_keylen_cipher(blowfish, BLOWFISH, ofb64, OFB, BF_FLAGS, 64, 8, 64, stream)
  59 /* bf_cfb_functions */
  60 IMPLEMENT_var_keylen_cipher(blowfish, BLOWFISH, cfb64,  CFB, BF_FLAGS, 64, 8, 64, stream)