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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ecdsa_p256.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ecdsa_p256.h
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+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ecdsa_p256.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.
+ * 
+ */
+
+#ifndef OCC_ECDSA_P256_H
+#define OCC_ECDSA_P256_H
+
+#include <stdint.h>
+
+
+// ecdsa P-256 signature key pair generation
+// pk[64]: the generated public key
+// sk[32]: the private key
+// returns 0 if sk is a legal secret key
+int occ_ecdsa_p256_public_key(uint8_t pk[64], const uint8_t sk[32]);
+
+// ecdsa P-256 signature generate
+// sig[64]: the generated signature
+// m[mlen]: the input message
+// sk[32]:  the secret key
+// ek[32]:  the session key
+// returns 0 if ek is a valid session key
+int occ_ecdsa_p256_sign(uint8_t sig[64], const uint8_t *m, uint32_t mlen, const uint8_t sk[32], const uint8_t ek[32]);
+
+// ecdsa P-256 signature generate
+// sig[64]: the generated signature
+// hash[32]: SHA-256 hash of the input message
+// sk[32]:  the secret key
+// ek[32]:  the session key
+// returns 0 if ek is a valid session key
+int occ_ecdsa_p256_sign_hash(uint8_t sig[64], const uint8_t hash[32], const uint8_t sk[32], const uint8_t ek[32]);
+
+
+// ecdsa P-256 signature verification
+// sig[64]: the input signature
+// m[mlen]: the input message
+// pk[64]:  the public key
+// returns 0 if signature is valid, -1 otherwise
+int occ_ecdsa_p256_verify(const uint8_t sig[64], const uint8_t *m, uint32_t mlen, const uint8_t pk[64]);
+
+// ecdsa P-256 signature verification
+// sig[64]: the input signature
+// hash[32]: SHA-256 hash of the input message
+// pk[64]:  the public key
+// returns 0 if signature is valid, -1 otherwise
+int occ_ecdsa_p256_verify_hash(const uint8_t sig[64], const uint8_t hash[32], const uint8_t pk[64]);
+
+
+#endif