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9ef26c347e
Support Schnorr signature and verification defined in https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/2019-05-15-schnorr.md. The implementation is based on https://github.com/Bitcoin-ABC/secp256k1 as well as the test vectors.
37 lines
1.6 KiB
C
37 lines
1.6 KiB
C
/**
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* Copyright (c) 2021 The Bitcoin ABC developers
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __SCHNORR_H__
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#define __SCHNORR_H__
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#include "ecdsa.h"
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/* A Schnorr signature is always 64 bytes */
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#define SCHNORR_SIG_LENGTH 64
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// sign/verify returns 0 if operation succeeded
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int schnorr_sign_digest(const ecdsa_curve *curve, const uint8_t *priv_key,
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const uint8_t *digest, uint8_t *result);
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int schnorr_verify_digest(const ecdsa_curve *curve, const uint8_t *pub_key,
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const uint8_t *msg_hash, const uint8_t *sign);
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#endif
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