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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_curve25519.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_curve25519.h
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+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_curve25519.h
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+/**
+ * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+/**@file
+ * Curve25519 is an elliptic curve offering 128 bits of security. It is designed
+ * for use in the elliptic curve Diffie-Hellman (ECDH) key agreement scheme.
+ *
+ * @see [RFC 7748 - Elliptic Curves for Security](https://tools.ietf.org/html/rfc7748)
+ * @see [Curve25519: high-speed elliptic-curve cryptography](http://cr.yp.to/ecdh.html)
+ */
+
+#ifndef OCC_CURVE25519_H
+#define OCC_CURVE25519_H
+
+#include <stdint.h>
+
+
+/**
+ * Length of a scalar.
+ */
+#define occ_curve25519_SCALAR_BYTES (32)
+
+/**
+ * Length of a curve point.
+ */
+#define occ_curve25519_BYTES (32)
+
+
+/**
+ * Curve25519 scalar multiplication `r = n * basePoint`.
+ *
+ * Given a secret key @p n, the corresponding Curve25519 public key is computed
+ * and put into @p r.
+ *
+ * The inverse of this function is difficult to compute.
+ *
+ * **Example**
+ * @include occ_curve25519_scalarmult_base.c
+ *
+ * @param[out] r Resulting curve point.
+ * @param[in]  n Scalar factor.
+ *
+ * @remark @p r and @p n can point to the same address.
+ */
+void occ_curve25519_scalarmult_base(uint8_t r[occ_curve25519_BYTES],
+                                    const uint8_t n[occ_curve25519_SCALAR_BYTES]);
+
+/**
+ * Curve25519 scalar multiplication `r = n * p`.
+ *
+ * A shared secret is computed from the local secret key @p n and another
+ * party's public key @p p and put into @p r. The same shared secret is
+ * generated when the other party combines its private key with the local public
+ * key.
+ *
+ * **Example**
+ * @include occ_curve25519_scalarmult.c
+ *
+ * @param[out] r Resulting curve point.
+ * @param[in]  n Scalar factor.
+ * @param[in]  p Point factor.
+ *
+ * @remark @p r and @p n can point to the same address.
+ */
+void occ_curve25519_scalarmult(uint8_t r[occ_curve25519_BYTES],
+                               const uint8_t n[occ_curve25519_SCALAR_BYTES],
+                               const uint8_t p[occ_curve25519_BYTES]);
+
+#endif