providers/default/ciphers/cipher_seed.c

   1 /*
   2  * Copyright 2019 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 #include "cipher_seed.h"
  13 #include "internal/provider_algs.h"
  14
  15 /* TODO (3.0) Figure out what flags are required */
  16 #define SEED_FLAGS EVP_CIPH_FLAG_DEFAULT_ASN1
  17
  18 static OSSL_OP_cipher_freectx_fn seed_freectx;
  19 static OSSL_OP_cipher_dupctx_fn seed_dupctx;
  20
  21 static void seed_freectx(void *vctx)
  22 {
  23     PROV_SEED_CTX *ctx = (PROV_SEED_CTX *)vctx;
  24
  25     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  26 }
  27
  28 static void *seed_dupctx(void *ctx)
  29 {
  30     PROV_SEED_CTX *in = (PROV_SEED_CTX *)ctx;
  31     PROV_SEED_CTX *ret = OPENSSL_malloc(sizeof(*ret));
  32
  33     if (ret == NULL) {
  34         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  35         return NULL;
  36     }
  37     *ret = *in;
  38
  39     return ret;
  40 }
  41
  42 /* seed128ecb_functions */
  43 IMPLEMENT_generic_cipher(seed, SEED, ecb, ECB, SEED_FLAGS, 128, 128, 0, block)
  44 /* seed128cbc_functions */
  45 IMPLEMENT_generic_cipher(seed, SEED, cbc, CBC, SEED_FLAGS, 128, 128, 128, block)
  46 /* seed128ofb128_functions */
  47 IMPLEMENT_generic_cipher(seed, SEED, ofb128, OFB, SEED_FLAGS, 128, 8, 128, stream)
  48 /* seed128cfb128_functions */
  49 IMPLEMENT_generic_cipher(seed, SEED, cfb128,  CFB, SEED_FLAGS, 128, 8, 128, stream)