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69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_UTIL_MESSAGE_H
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#define BITCOIN_UTIL_MESSAGE_H
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#include <key.h> // For CKey
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#include <uint256.h>
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#include <string>
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extern const std::string MESSAGE_MAGIC;
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/** The result of a signed message verification.
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* Message verification takes as an input:
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* - address (with whose private key the message is supposed to have been signed)
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* - signature
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* - message
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*/
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enum class MessageVerificationResult {
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//! The provided address is invalid.
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ERR_INVALID_ADDRESS,
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//! The provided address is valid but does not refer to a public key.
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ERR_ADDRESS_NO_KEY,
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//! The provided signature couldn't be parsed (maybe invalid base64).
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ERR_MALFORMED_SIGNATURE,
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//! A public key could not be recovered from the provided signature and message.
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ERR_PUBKEY_NOT_RECOVERED,
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//! The message was not signed with the private key of the provided address.
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ERR_NOT_SIGNED,
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//! The message verification was successful.
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OK
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};
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/** Verify a signed message.
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* @param[in] address Signer's bitcoin address, it must refer to a public key.
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* @param[in] signature The signature in base64 format.
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* @param[in] message The message that was signed.
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* @return result code */
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MessageVerificationResult MessageVerify(
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const std::string& address,
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const std::string& signature,
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const std::string& message);
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/** Sign a message.
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* @param[in] privkey Private key to sign with.
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* @param[in] message The message to sign.
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* @param[out] signature Signature, base64 encoded, only set if true is returned.
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* @return true if signing was successful. */
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bool MessageSign(
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const CKey& privkey,
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const std::string& message,
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std::string& signature);
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/**
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* Hashes a message for signing and verification in a manner that prevents
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* inadvertently signing a transaction.
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*/
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uint256 MessageHash(const std::string& message);
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#endif // BITCOIN_UTIL_MESSAGE_H
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