diff --git a/library/ecp_internal.h b/library/ecp_internal.h
new file mode 100644
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--- /dev/null
+++ b/library/ecp_internal.h
@@ -0,0 +1,45 @@
+
+/**
+ * \file ecp_internal.h
+ *
+ * \brief ECC-related functions with external linkage but which are
+ *        not part of the public API.
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+#ifndef MBEDTLS_ECP_INTERNAL_H
+#define MBEDTLS_ECP_INTERNAL_H
+
+#include "common.h"
+#include "mbedtls/ecp.h"
+#include "mbedtls/ecdh.h"
+
+static inline mbedtls_ecp_group_id mbedtls_ecp_named_group_to_id(
+    uint16_t named_curve )
+{
+    const mbedtls_ecp_curve_info *curve_info;
+    curve_info = mbedtls_ecp_curve_info_from_tls_id( named_curve );
+    if( curve_info == NULL )
+        return( MBEDTLS_ECP_DP_NONE );
+    return( curve_info->grp_id );
+}
+
+int mbedtls_ecdh_import_public_raw( mbedtls_ecdh_context *ctx,
+                                    const unsigned char *buf,
+                                    const unsigned char *end );
+
+#endif /* MBEDTLS_ECP_INTERNAL_H */