初始版本

components/libraries/crypto/backend/oberon/oberon_backend_ecdsa.c

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+/**
+ * Copyright (c) 2018 - 2020, 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) && \
+    NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include "nrf_crypto_ecc.h"
+#include "nrf_crypto_rng.h"
+#include "nrf_crypto_ecdsa.h"
+#include "oberon_backend_eddsa.h"
+#include "nrf_crypto_eddsa_shared.h"
+#include "ocrypto_ecdsa_p256.h"
+
+
+#define OBERON_HASH_SIZE_FOR_SECP256R1 (256 / 8)
+
+
+ret_code_t nrf_crypto_backend_secp256r1_sign(
+    void          * p_context,
+    void    const * p_private_key,
+    uint8_t const * p_data,
+    size_t          data_size,
+    uint8_t       * p_signature)
+{
+    int     result;
+    uint8_t session_key[32];
+
+    nrf_crypto_backend_secp256r1_private_key_t const * p_prv =
+        (nrf_crypto_backend_secp256r1_private_key_t const *)p_private_key;
+
+    if (data_size < OBERON_HASH_SIZE_FOR_SECP256R1)
+    {
+        return NRF_ERROR_CRYPTO_INPUT_LENGTH;
+    }
+
+    result = nrf_crypto_backend_oberon_ecc_secp256r1_rng(session_key);
+    if (result != NRF_SUCCESS)
+    {
+        return result;
+    }
+
+    result = ocrypto_ecdsa_p256_sign_hash(p_signature, p_data, p_prv->key, session_key);
+
+    return result == 0 ? NRF_SUCCESS : NRF_ERROR_CRYPTO_INTERNAL;
+}
+
+
+ret_code_t nrf_crypto_backend_secp256r1_verify(
+    void          * p_context,
+    void    const * p_public_key,
+    uint8_t const * p_data,
+    size_t          data_size,
+    uint8_t const * p_signature)
+{
+    int result;
+
+    nrf_crypto_backend_secp256r1_public_key_t const * p_pub =
+        (nrf_crypto_backend_secp256r1_public_key_t const *)p_public_key;
+
+    if (data_size < OBERON_HASH_SIZE_FOR_SECP256R1)
+    {
+        return NRF_ERROR_CRYPTO_INPUT_LENGTH;
+    }
+
+    result = ocrypto_ecdsa_p256_verify_hash(p_signature, p_data, p_pub->key);
+
+    if (result != 0)
+    {
+        return NRF_ERROR_CRYPTO_ECDSA_INVALID_SIGNATURE;
+    }
+    return NRF_SUCCESS;
+}
+
+
+#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1)