1 files changed, 61 insertions, 0 deletions
diff --git a/crypto/openssl/providers/implementations/digests/mdc2_prov.c b/crypto/openssl/providers/implementations/digests/mdc2_prov.c
new file mode 100644
index 000000000000..e1fc477d21e5
--- /dev/null
+++ b/crypto/openssl/providers/implementations/digests/mdc2_prov.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * MDC2 low level APIs are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
+
+#include <openssl/crypto.h>
+#include <openssl/params.h>
+#include <openssl/mdc2.h>
+#include <openssl/core_names.h>
+#include <openssl/err.h>
+#include <openssl/proverr.h>
+#include "prov/digestcommon.h"
+#include "prov/implementations.h"
+
+static OSSL_FUNC_digest_set_ctx_params_fn mdc2_set_ctx_params;
+static OSSL_FUNC_digest_settable_ctx_params_fn mdc2_settable_ctx_params;
+
+static const OSSL_PARAM known_mdc2_settable_ctx_params[] = {
+    OSSL_PARAM_uint(OSSL_DIGEST_PARAM_PAD_TYPE, NULL),
+    OSSL_PARAM_END
+};
+
+static const OSSL_PARAM *mdc2_settable_ctx_params(ossl_unused void *ctx,
+                                                  ossl_unused void *provctx)
+{
+    return known_mdc2_settable_ctx_params;
+}
+
+static int mdc2_set_ctx_params(void *vctx, const OSSL_PARAM params[])
+{
+    const OSSL_PARAM *p;
+    MDC2_CTX *ctx = (MDC2_CTX *)vctx;
+
+    if (ctx == NULL)
+        return 0;
+    if (ossl_param_is_empty(params))
+        return 1;
+
+    p = OSSL_PARAM_locate_const(params, OSSL_DIGEST_PARAM_PAD_TYPE);
+    if (p != NULL && !OSSL_PARAM_get_uint(p, &ctx->pad_type)) {
+        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
+        return 0;
+    }
+    return 1;
+}
+
+/* ossl_mdc2_functions */
+IMPLEMENT_digest_functions_with_settable_ctx(
+    mdc2, MDC2_CTX, MDC2_BLOCK, MDC2_DIGEST_LENGTH, 0,
+    MDC2_Init, MDC2_Update, MDC2_Final,
+    mdc2_settable_ctx_params, mdc2_set_ctx_params)