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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <common/signmessage.h>
#include <key.h>
#include <key_io.h>
#include <rpc/protocol.h>
#include <rpc/request.h>
#include <rpc/server.h>
#include <rpc/util.h>
#include <univalue.h>
#include <string>
static RPCHelpMan verifymessage()
{
return RPCHelpMan{"verifymessage",
"Verify a signed message.",
{
{"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to use for the signature."},
{"signature", RPCArg::Type::STR, RPCArg::Optional::NO, "The signature provided by the signer in base 64 encoding (see signmessage)."},
{"message", RPCArg::Type::STR, RPCArg::Optional::NO, "The message that was signed."},
},
RPCResult{
RPCResult::Type::BOOL, "", "If the signature is verified or not."
},
RPCExamples{
"\nUnlock the wallet for 30 seconds\n"
+ HelpExampleCli("walletpassphrase", "\"mypassphrase\" 30") +
"\nCreate the signature\n"
+ HelpExampleCli("signmessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"my message\"") +
"\nVerify the signature\n"
+ HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"signature\" \"my message\"") +
"\nAs a JSON-RPC call\n"
+ HelpExampleRpc("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", \"signature\", \"my message\"")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
std::string strAddress = self.Arg<std::string>("address");
std::string strSign = self.Arg<std::string>("signature");
std::string strMessage = self.Arg<std::string>("message");
switch (MessageVerify(strAddress, strSign, strMessage)) {
case MessageVerificationResult::ERR_INVALID_ADDRESS:
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
case MessageVerificationResult::ERR_ADDRESS_NO_KEY:
throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
case MessageVerificationResult::ERR_MALFORMED_SIGNATURE:
throw JSONRPCError(RPC_TYPE_ERROR, "Malformed base64 encoding");
case MessageVerificationResult::ERR_PUBKEY_NOT_RECOVERED:
case MessageVerificationResult::ERR_NOT_SIGNED:
return false;
case MessageVerificationResult::OK:
return true;
}
return false;
},
};
}
static RPCHelpMan signmessagewithprivkey()
{
return RPCHelpMan{"signmessagewithprivkey",
"\nSign a message with the private key of an address\n",
{
{"privkey", RPCArg::Type::STR, RPCArg::Optional::NO, "The private key to sign the message with."},
{"message", RPCArg::Type::STR, RPCArg::Optional::NO, "The message to create a signature of."},
},
RPCResult{
RPCResult::Type::STR, "signature", "The signature of the message encoded in base 64"
},
RPCExamples{
"\nCreate the signature\n"
+ HelpExampleCli("signmessagewithprivkey", "\"privkey\" \"my message\"") +
"\nVerify the signature\n"
+ HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"signature\" \"my message\"") +
"\nAs a JSON-RPC call\n"
+ HelpExampleRpc("signmessagewithprivkey", "\"privkey\", \"my message\"")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
std::string strPrivkey = request.params[0].get_str();
std::string strMessage = request.params[1].get_str();
CKey key = DecodeSecret(strPrivkey);
if (!key.IsValid()) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
}
std::string signature;
if (!MessageSign(key, strMessage, signature)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
}
return signature;
},
};
}
void RegisterSignMessageRPCCommands(CRPCTable& t)
{
static const CRPCCommand commands[]{
{"util", &verifymessage},
{"util", &signmessagewithprivkey},
};
for (const auto& c : commands) {
t.appendCommand(c.name, &c);
}
}
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