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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ed25519.h')
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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ed25519.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ed25519.h new file mode 100644 index 0000000..68ad490 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/nrf_oberon/include/occ_ed25519.h @@ -0,0 +1,130 @@ +/** + * 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 + * Ed25519 is a specific implementation of EdDSA, a digital signature scheme. + * EdDSA is based on Twisted Edwards curves and is designed to be faster than + * existing digital signature schemes without sacrificing security. It was + * developed by Daniel J. Bernstein, et al. Ed25519 is intended to provide + * attack resistance comparable to quality 128-bit symmetric ciphers. + * + * @see [Ed25519: high-speed high-security signatures](https://ed25519.cr.yp.to) + */ + +#ifndef OCC_ED25519_H +#define OCC_ED25519_H + +#include <stdint.h> +#include <stddef.h> + + +/** + * Length of a public key. + */ +#define occ_ed25519_PUBLIC_KEY_BYTES (32) + +/** + * Length of a secret key. + */ +#define occ_ed25519_SECRET_KEY_BYTES (32) + +/** + * Length of a signature. + */ +#define occ_ed25519_BYTES (64) + + +/** + * Ed25519 signature key pair generation. + * + * Given a secret key `sk`, the corresponding public key is computed and put + * into `pk`. The key pair can then be used to sign and verify message signatures. + * + * **Example** + * @include occ_ed25519_public_key.c + * + * @param[out] pk Generated public key. + * @param sk Secret key. Must be prefilled with random data. + */ +void occ_ed25519_public_key(uint8_t pk[occ_ed25519_PUBLIC_KEY_BYTES], + const uint8_t sk[occ_ed25519_SECRET_KEY_BYTES]); + +/** + * Ed25519 signature generate. + * + * The message @p m is signed using the secret key @p sk and the corresponding + * public key @p pk. The signature is put into @p sig. + * + * **Example** + * @include occ_ed25519_sign.c + * + * @param[out] sig Generated signature. + * @param m Input message. + * @param m_len Length of @p m. + * @param sk Secret key. + * @param pk Public key. + */ +void occ_ed25519_sign(uint8_t sig[occ_ed25519_BYTES], + const uint8_t *m, size_t m_len, + const uint8_t sk[occ_ed25519_SECRET_KEY_BYTES], + const uint8_t pk[occ_ed25519_PUBLIC_KEY_BYTES]); + +/** + * Ed25519 signature verification. + * + * The signature @p sig of the input message @p m is verified using the signer's + * public key @p pk. + * + * **Example** + * @include occ_ed25519_verify.c + * + * @param sig Input signature. + * @param m Input message. + * @param m_len Length of @p m. + * @param pk Signer's public key. + * + * @returns 0 If signature OK. + * @returns -1 Otherwise. + */ +int occ_ed25519_verify(const uint8_t sig[occ_ed25519_BYTES], + const uint8_t *m, size_t m_len, + const uint8_t pk[occ_ed25519_PUBLIC_KEY_BYTES]); + +#endif |