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Create signmessagewithprivkey rpc

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New rpc 'signmessagewithprivkey' which takes a private key to sign a message without using the wallet.
This commit is contained in:
Andrew 2016-04-26 13:17:00 -04:00
parent e26b62093a
commit f90efbfeef
1 changed files with 43 additions and 0 deletions
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43
src/rpc/misc.cpp
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@ -366,6 +366,48 @@ UniValue verifymessage(const UniValue& params, bool fHelp)
return (pubkey.GetID() == keyID);
}
UniValue signmessagewithprivkey(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() != 2)
throw runtime_error(
"signmessagewithprivkey \"privkey\" \"message\"\n"
"\nSign a message with the private key of an address\n"
"\nArguments:\n"
"1. \"privkey\" (string, required) The private key to sign the message with.\n"
"2. \"message\" (string, required) The message to create a signature of.\n"
"\nResult:\n"
"\"signature\" (string) The signature of the message encoded in base 64\n"
"\nExamples:\n"
"\nCreate the signature\n"
+ HelpExampleCli("signmessagewithprivkey", "\"privkey\" \"my message\"") +
"\nVerify the signature\n"
+ HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XZ\" \"signature\" \"my message\"") +
"\nAs json rpc\n"
+ HelpExampleRpc("signmessagewithprivkey", "\"privkey\", \"my message\"")
);
string strPrivkey = params[0].get_str();
string strMessage = params[1].get_str();
CBitcoinSecret vchSecret;
bool fGood = vchSecret.SetString(strPrivkey);
if (!fGood)
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
CKey key = vchSecret.GetKey();
if (!key.IsValid())
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
CHashWriter ss(SER_GETHASH, 0);
ss << strMessageMagic;
ss << strMessage;
vector<unsigned char> vchSig;
if (!key.SignCompact(ss.GetHash(), vchSig))
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
return EncodeBase64(&vchSig[0], vchSig.size());
}
UniValue setmocktime(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() != 1)
@ -404,6 +446,7 @@ static const CRPCCommand commands[] =
{ "util", "validateaddress", &validateaddress, true }, /* uses wallet if enabled */
{ "util", "createmultisig", &createmultisig, true },
{ "util", "verifymessage", &verifymessage, true },
{ "util", "signmessagewithprivkey", &signmessagewithprivkey, true },
/* Not shown in help */
{ "hidden", "setmocktime", &setmocktime, true },