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-rw-r--r--src/rpc/misc.cpp43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
index e8a099b445..09f5185781 100644
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -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 },