1 files changed, 114 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecdh.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecdh.c
new file mode 100644
index 0000000..9dcba96
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecdh.c
@@ -0,0 +1,114 @@
+/**
+ * Copyright (c) 2018 - 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.
+ * 
+ */
+
+#include "sdk_config.h"
+#include "nordic_common.h"
+
+#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON)
+
+#include <stdint.h>
+
+#include "nrf_crypto_ecc.h"
+#include "nrf_crypto_ecdh.h"
+#include "nrf_crypto_shared.h"
+
+#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)
+#include "occ_ecdh_p256.h"
+#endif
+#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519)
+#include "occ_curve25519.h"
+#endif
+
+
+
+#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)
+
+ret_code_t nrf_crypto_backend_secp256r1_ecdh_compute(
+    void       * p_context,
+    void const * p_private_key,
+    void const * p_public_key,
+    uint8_t    * p_shared_secret)
+{
+    int result;
+
+    nrf_crypto_backend_secp256r1_private_key_t const * p_prv =
+        (nrf_crypto_backend_secp256r1_private_key_t const *)p_private_key;
+
+    nrf_crypto_backend_secp256r1_public_key_t const * p_pub =
+        (nrf_crypto_backend_secp256r1_public_key_t const *)p_public_key;
+
+    result = occ_ecdh_p256_common_secret(p_shared_secret, p_prv->key, p_pub->key);
+
+    if (result != 0)
+    {
+        return NRF_ERROR_CRYPTO_INTERNAL;
+    }
+    return NRF_SUCCESS;
+}
+
+#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)
+
+#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519)
+
+ret_code_t nrf_crypto_backend_curve25519_ecdh_compute(
+    void       * p_context,
+    void const * p_private_key,
+    void const * p_public_key,
+    uint8_t    * p_shared_secret)
+{
+    nrf_crypto_backend_curve25519_private_key_t const * p_prv =
+        (nrf_crypto_backend_curve25519_private_key_t const *)p_private_key;
+
+    nrf_crypto_backend_curve25519_public_key_t const * p_pub =
+        (nrf_crypto_backend_curve25519_public_key_t const *)p_public_key;
+
+    // Private key can be completely random at this point.
+    // Oberon library updates bits in the key according to Curve25519 specification before use.
+    occ_curve25519_scalarmult(p_shared_secret, p_prv->key, p_pub->key);
+
+    nrf_crypto_internal_swap_endian_in_place(p_shared_secret,
+                                             NRF_CRYPTO_ECDH_CURVE25519_SHARED_SECRET_SIZE);
+
+    return NRF_SUCCESS;
+}
+
+#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519)
+
+#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON)