providers/implementations/digests/mdc2_prov.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  * MDC2 low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/crypto.h>
  17 #include <openssl/params.h>
  18 #include <openssl/mdc2.h>
  19 #include <openssl/core_names.h>
  20 #include <openssl/err.h>
  21 #include <openssl/proverr.h>
  22 #include "prov/digestcommon.h"
  23 #include "prov/implementations.h"
  24
  25 static OSSL_FUNC_digest_set_ctx_params_fn mdc2_set_ctx_params;
  26 static OSSL_FUNC_digest_settable_ctx_params_fn mdc2_settable_ctx_params;
  27
  28 static const OSSL_PARAM known_mdc2_settable_ctx_params[] = {
  29     OSSL_PARAM_uint(OSSL_DIGEST_PARAM_PAD_TYPE, NULL),
  30     OSSL_PARAM_END
  31 };
  32
  33 static const OSSL_PARAM *mdc2_settable_ctx_params(ossl_unused void *provctx)
  34 {
  35     return known_mdc2_settable_ctx_params;
  36 }
  37
  38 static int mdc2_set_ctx_params(void *vctx, const OSSL_PARAM params[])
  39 {
  40     const OSSL_PARAM *p;
  41     MDC2_CTX *ctx = (MDC2_CTX *)vctx;
  42
  43     if (ctx != NULL && params != NULL) {
  44         p = OSSL_PARAM_locate_const(params, OSSL_DIGEST_PARAM_PAD_TYPE);
  45         if (p != NULL && !OSSL_PARAM_get_uint(p, &ctx->pad_type)) {
  46             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
  47             return 0;
  48         }
  49         return 1;
  50     }
  51     return 0; /* Null Parameter */
  52 }
  53
  54 /* ossl_mdc2_functions */
  55 IMPLEMENT_digest_functions_with_settable_ctx(
  56     mdc2, MDC2_CTX, MDC2_BLOCK, MDC2_DIGEST_LENGTH, 0,
  57     MDC2_Init, MDC2_Update, MDC2_Final,
  58     mdc2_settable_ctx_params, mdc2_set_ctx_params)