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      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     ossl_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         return NULL;
     44     *ret = *in;
     45 
     46     return ret;
     47 }
     48 
     49 /* ossl_seed128ecb_functions */
     50 IMPLEMENT_generic_cipher(seed, SEED, ecb, ECB, 0, 128, 128, 0, block)
     51 /* ossl_seed128cbc_functions */
     52 IMPLEMENT_generic_cipher(seed, SEED, cbc, CBC, 0, 128, 128, 128, block)
     53 /* ossl_seed128ofb128_functions */
     54 IMPLEMENT_generic_cipher(seed, SEED, ofb128, OFB, 0, 128, 8, 128, stream)
     55 /* ossl_seed128cfb128_functions */
     56 IMPLEMENT_generic_cipher(seed, SEED, cfb128, CFB, 0, 128, 8, 128, stream)
     57