providers/implementations/ciphers/cipher_seed.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 Seed cipher modes ecb, cbc, ofb, cfb */
  11
  12 /*
  13  * SEED low level APIs are deprecated for public use, but still ok for
  14  * internal use.
  15  */
  16 #include "internal/deprecated.h"
  17
  18 #include "cipher_seed.h"
  19 #include "prov/implementations.h"
  20 #include "prov/providercommon.h"
  21
  22 static OSSL_FUNC_cipher_freectx_fn seed_freectx;
  23 static OSSL_FUNC_cipher_dupctx_fn seed_dupctx;
  24
  25 static void seed_freectx(void *vctx)
  26 {
  27     PROV_SEED_CTX *ctx = (PROV_SEED_CTX *)vctx;
  28
  29     cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
  30     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  31 }
  32
  33 static void *seed_dupctx(void *ctx)
  34 {
  35     PROV_SEED_CTX *in = (PROV_SEED_CTX *)ctx;
  36     PROV_SEED_CTX *ret;
  37
  38     if (!ossl_prov_is_running())
  39         return NULL;
  40
  41     ret = OPENSSL_malloc(sizeof(*ret));
  42     if (ret == NULL) {
  43         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  44         return NULL;
  45     }
  46     *ret = *in;
  47
  48     return ret;
  49 }
  50
  51 /* ossl_seed128ecb_functions */
  52 IMPLEMENT_generic_cipher(seed, SEED, ecb, ECB, 0, 128, 128, 0, block)
  53 /* ossl_seed128cbc_functions */
  54 IMPLEMENT_generic_cipher(seed, SEED, cbc, CBC, 0, 128, 128, 128, block)
  55 /* ossl_seed128ofb128_functions */
  56 IMPLEMENT_generic_cipher(seed, SEED, ofb128, OFB, 0, 128, 8, 128, stream)
  57 /* ossl_seed128cfb128_functions */
  58 IMPLEMENT_generic_cipher(seed, SEED, cfb128,  CFB, 0, 128, 8, 128, stream)