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Merge pull request #524 from sipa/signandverif

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Sign and verify message with bitcoin address
This commit is contained in:
Gavin Andresen
2011-09-30 05:04:26 -07:00
parent e297ea999e 3a570dc80a
commit f4769e44a3
6 changed files with 372 additions and 38 deletions
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105
src/bitcoinrpc.cpp
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@@ -526,6 +526,72 @@ Value sendtoaddress(const Array& params, bool fHelp)
return wtx.GetHash().GetHex();
}
static const string strMessageMagic = "Bitcoin Signed Message:\n";
Value signmessage(const Array& params, bool fHelp)
{
if (fHelp || params.size() != 2)
throw runtime_error(
"signmessage <bitcoinaddress> <message>\n"
"Sign a message with the private key of an address");
if (pwalletMain->IsLocked())
throw JSONRPCError(-13, "Error: Please enter the wallet passphrase with walletpassphrase first.");
string strAddress = params[0].get_str();
string strMessage = params[1].get_str();
CBitcoinAddress addr(strAddress);
if (!addr.IsValid())
throw JSONRPCError(-3, "Invalid address");
CKey key;
if (!pwalletMain->GetKey(addr, key))
throw JSONRPCError(-4, "Private key not available");
CDataStream ss(SER_GETHASH);
ss << strMessageMagic;
ss << strMessage;
vector<unsigned char> vchSig;
if (!key.SignCompact(Hash(ss.begin(), ss.end()), vchSig))
throw JSONRPCError(-5, "Sign failed");
return EncodeBase64(&vchSig[0], vchSig.size());
}
Value verifymessage(const Array& params, bool fHelp)
{
if (fHelp || params.size() != 3)
throw runtime_error(
"verifymessage <bitcoinaddress> <signature> <message>\n"
"Verify a signed message");
string strAddress = params[0].get_str();
string strSign = params[1].get_str();
string strMessage = params[2].get_str();
CBitcoinAddress addr(strAddress);
if (!addr.IsValid())
throw JSONRPCError(-3, "Invalid address");
bool fInvalid = false;
vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);
if (fInvalid)
throw JSONRPCError(-5, "Malformed base64 encoding");
CDataStream ss(SER_GETHASH);
ss << strMessageMagic;
ss << strMessage;
CKey key;
if (!key.SetCompactSignature(Hash(ss.begin(), ss.end()), vchSig))
return false;
return (key.GetAddress() == addr);
}
Value getreceivedbyaddress(const Array& params, bool fHelp)
{
@@ -1627,6 +1693,8 @@ pair<string, rpcfn_type> pCallTable[] =
make_pair("sendmany", &sendmany),
make_pair("gettransaction", &gettransaction),
make_pair("listtransactions", &listtransactions),
make_pair("signmessage", &signmessage),
make_pair("verifymessage", &verifymessage),
make_pair("getwork", &getwork),
make_pair("listaccounts", &listaccounts),
make_pair("settxfee", &settxfee),
@@ -1799,43 +1867,6 @@ int ReadHTTP(std::basic_istream<char>& stream, map<string, string>& mapHeadersRe
return nStatus;
}
string EncodeBase64(string s)
{
BIO *b64, *bmem;
BUF_MEM *bptr;
b64 = BIO_new(BIO_f_base64());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bmem = BIO_new(BIO_s_mem());
b64 = BIO_push(b64, bmem);
BIO_write(b64, s.c_str(), s.size());
BIO_flush(b64);
BIO_get_mem_ptr(b64, &bptr);
string result(bptr->data, bptr->length);
BIO_free_all(b64);
return result;
}
string DecodeBase64(string s)
{
BIO *b64, *bmem;
char* buffer = static_cast<char*>(calloc(s.size(), sizeof(char)));
b64 = BIO_new(BIO_f_base64());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bmem = BIO_new_mem_buf(const_cast<char*>(s.c_str()), s.size());
bmem = BIO_push(b64, bmem);
BIO_read(bmem, buffer, s.size());
BIO_free_all(bmem);
string result(buffer);
free(buffer);
return result;
}
bool HTTPAuthorized(map<string, string>& mapHeaders)
{
string strAuth = mapHeaders["authorization"];