Added additional config option for multiple RPC users.

qa/pull-tester/rpc-tests.py

@@ -78,6 +78,7 @@ testScripts = [
     'mempool_spendcoinbase.py',
     'mempool_coinbase_spends.py',
     'httpbasics.py',
+    'multi_rpc.py',
     'zapwallettxes.py',
     'proxy_test.py',
     'merkle_blocks.py',

qa/rpc-tests/multi_rpc.py

@@ -0,0 +1,122 @@
+#!/usr/bin/env python2
+# Copyright (c) 2015 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#
+# Test mulitple rpc user config option rpcauth
+#
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+import base64
+
+try:
+    import http.client as httplib
+except ImportError:
+    import httplib
+try:
+    import urllib.parse as urlparse
+except ImportError:
+    import urlparse
+
+class HTTPBasicsTest (BitcoinTestFramework):
+    def setup_nodes(self):
+        return start_nodes(4, self.options.tmpdir)
+
+    def setup_chain(self):
+        print("Initializing test directory "+self.options.tmpdir)
+        initialize_chain(self.options.tmpdir)
+        #Append rpcauth to bitcoin.conf before initialization
+        rpcauth = "rpcauth=rt:93648e835a54c573682c2eb19f882535$7681e9c5b74bdd85e78166031d2058e1069b3ed7ed967c93fc63abba06f31144"
+        rpcauth2 = "rpcauth=rt2:f8607b1a88861fac29dfccf9b52ff9f$ff36a0c23c8c62b4846112e50fa888416e94c17bfd4c42f88fd8f55ec6a3137e"
+        with open(os.path.join(self.options.tmpdir+"/node0", "bitcoin.conf"), 'a') as f:
+            f.write(rpcauth+"\n")
+            f.write(rpcauth2+"\n")
+
+    def run_test(self):
+
+        ##################################################
+        # Check correctness of the rpcauth config option #
+        ##################################################
+        url = urlparse.urlparse(self.nodes[0].url)
+
+        #Old authpair
+        authpair = url.username + ':' + url.password
+
+        #New authpair generated via contrib/rpcuser tool
+        rpcauth = "rpcauth=rt:93648e835a54c573682c2eb19f882535$7681e9c5b74bdd85e78166031d2058e1069b3ed7ed967c93fc63abba06f31144"
+        password = "cA773lm788buwYe4g4WT+05pKyNruVKjQ25x3n0DQcM="
+
+        #Second authpair with different username
+        rpcauth2 = "rpcauth=rt2:f8607b1a88861fac29dfccf9b52ff9f$ff36a0c23c8c62b4846112e50fa888416e94c17bfd4c42f88fd8f55ec6a3137e"
+        password2 = "8/F3uMDw4KSEbw96U3CA1C4X05dkHDN2BPFjTgZW4KI="
+        authpairnew = "rt:"+password
+
+        headers = {"Authorization": "Basic " + base64.b64encode(authpair)}
+
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
+        resp = conn.getresponse()
+        assert_equal(resp.status==401, False)
+        conn.close()
+        
+        #Use new authpair to confirm both work
+        headers = {"Authorization": "Basic " + base64.b64encode(authpairnew)}
+
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
+        resp = conn.getresponse()
+        assert_equal(resp.status==401, False)
+        conn.close()
+
+        #Wrong login name with rt's password
+        authpairnew = "rtwrong:"+password
+        headers = {"Authorization": "Basic " + base64.b64encode(authpairnew)}
+
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
+        resp = conn.getresponse()
+        assert_equal(resp.status==401, True)
+        conn.close()
+
+        #Wrong password for rt
+        authpairnew = "rt:"+password+"wrong"
+        headers = {"Authorization": "Basic " + base64.b64encode(authpairnew)}
+
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
+        resp = conn.getresponse()
+        assert_equal(resp.status==401, True)
+        conn.close()
+
+        #Correct for rt2
+        authpairnew = "rt2:"+password2
+        headers = {"Authorization": "Basic " + base64.b64encode(authpairnew)}
+
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
+        resp = conn.getresponse()
+        assert_equal(resp.status==401, False)
+        conn.close()
+
+        #Wrong password for rt2
+        authpairnew = "rt2:"+password2+"wrong"
+        headers = {"Authorization": "Basic " + base64.b64encode(authpairnew)}
+
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
+        resp = conn.getresponse()
+        assert_equal(resp.status==401, True)
+        conn.close()
+
+
+
+if __name__ == '__main__':
+    HTTPBasicsTest ().main ()

share/rpcuser/README.md

@@ -0,0 +1,11 @@
+RPC Tools
+---------------------
+
+### [RPCUser](/share/rpcuser) ###
+
+Create an RPC user login credential.
+
+Usage:
+
+./rpcuser.py <username>
+

share/rpcuser/rpcuser.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python2 
+# Copyright (c) 2015 The Bitcoin Core developers 
+# Distributed under the MIT software license, see the accompanying 
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+import hashlib
+import sys
+import os
+from random import SystemRandom
+import base64
+import hmac
+
+if len(sys.argv) < 2:
+    sys.stderr.write('Please include username as an argument.\n')
+    sys.exit(0)
+
+username = sys.argv[1]
+
+#This uses os.urandom() underneath
+cryptogen = SystemRandom()
+
+#Create 16 byte hex salt
+salt_sequence = [cryptogen.randrange(256) for i in range(16)]
+hexseq = list(map(hex, salt_sequence))
+salt = "".join([x[2:] for x in hexseq])
+
+#Create 32 byte b64 password
+password = base64.urlsafe_b64encode(os.urandom(32))
+
+digestmod = hashlib.sha256
+
+if sys.version_info.major >= 3:
+    password = password.decode('utf-8')
+    digestmod = 'SHA256'
+ 
+m = hmac.new(bytearray(salt, 'utf-8'), bytearray(password, 'utf-8'), digestmod)
+result = m.hexdigest()
+
+print("String to be appended to bitcoin.conf:")
+print("rpcauth="+username+":"+salt+"$"+result)
+print("Your password:\n"+password)

src/httprpc.cpp

@@ -10,8 +10,12 @@
 #include "util.h"
 #include "utilstrencodings.h"
 #include "ui_interface.h"
+#include "crypto/hmac_sha256.h"
+#include <stdio.h>
+#include "utilstrencodings.h"
 
 #include <boost/algorithm/string.hpp> // boost::trim
+#include <boost/foreach.hpp> //BOOST_FOREACH
 
 /** Simple one-shot callback timer to be used by the RPC mechanism to e.g.
  * re-lock the wellet.
@@ -72,6 +76,50 @@ static void JSONErrorReply(HTTPRequest* req, const UniValue& objError, const Uni
     req->WriteReply(nStatus, strReply);
 }
 
+//This function checks username and password against -rpcauth
+//entries from config file.
+static bool multiUserAuthorized(std::string strUserPass)
+{    
+    if (strUserPass.find(":") == std::string::npos) {
+        return false;
+    }
+    std::string strUser = strUserPass.substr(0, strUserPass.find(":"));
+    std::string strPass = strUserPass.substr(strUserPass.find(":") + 1);
+
+    if (mapMultiArgs.count("-rpcauth") > 0) {
+        //Search for multi-user login/pass "rpcauth" from config
+        BOOST_FOREACH(std::string strRPCAuth, mapMultiArgs["-rpcauth"])
+        {
+            std::vector<std::string> vFields;
+            boost::split(vFields, strRPCAuth, boost::is_any_of(":$"));
+            if (vFields.size() != 3) {
+                //Incorrect formatting in config file
+                continue;
+            }
+
+            std::string strName = vFields[0];
+            if (!TimingResistantEqual(strName, strUser)) {
+                continue;
+            }
+
+            std::string strSalt = vFields[1];
+            std::string strHash = vFields[2];
+
+            unsigned int KEY_SIZE = 32;
+            unsigned char *out = new unsigned char[KEY_SIZE]; 
+            
+            CHMAC_SHA256(reinterpret_cast<const unsigned char*>(strSalt.c_str()), strSalt.size()).Write(reinterpret_cast<const unsigned char*>(strPass.c_str()), strPass.size()).Finalize(out);
+            std::vector<unsigned char> hexvec(out, out+KEY_SIZE);
+            std::string strHashFromPass = HexStr(hexvec);
+
+            if (TimingResistantEqual(strHashFromPass, strHash)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
 static bool RPCAuthorized(const std::string& strAuth)
 {
     if (strRPCUserColonPass.empty()) // Belt-and-suspenders measure if InitRPCAuthentication was not called
@@ -81,7 +129,12 @@ static bool RPCAuthorized(const std::string& strAuth)
     std::string strUserPass64 = strAuth.substr(6);
     boost::trim(strUserPass64);
     std::string strUserPass = DecodeBase64(strUserPass64);
-    return TimingResistantEqual(strUserPass, strRPCUserColonPass);
+    
+    //Check if authorized under single-user field
+    if (TimingResistantEqual(strUserPass, strRPCUserColonPass)) {
+        return true;
+    }
+    return multiUserAuthorized(strUserPass);
 }
 
 static bool HTTPReq_JSONRPC(HTTPRequest* req, const std::string &)
@@ -157,6 +210,7 @@ static bool InitRPCAuthentication()
             return false;
         }
     } else {
+        LogPrintf("Config options rpcuser and rpcpassword will soon be deprecated. Locally-run instances may remove rpcuser to use cookie-based auth, or may be replaced with rpcauth. Please see share/rpcuser for rpcauth auth generation.");
         strRPCUserColonPass = mapArgs["-rpcuser"] + ":" + mapArgs["-rpcpassword"];
     }
     return true;

src/init.cpp

@@ -482,6 +482,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-rpcbind=<addr>", _("Bind to given address to listen for JSON-RPC connections. Use [host]:port notation for IPv6. This option can be specified multiple times (default: bind to all interfaces)"));
     strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
+    strUsage += HelpMessageOpt("-rpcauth=<userpw>", _("Username and hashed password for JSON-RPC connections. The field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A canonical python script is included in share/rpcuser. This option can be specified multiple times"));
     strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Listen for JSON-RPC connections on <port> (default: %u or testnet: %u)"), 8332, 18332));
     strUsage += HelpMessageOpt("-rpcallowip=<ip>", _("Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24). This option can be specified multiple times"));
     strUsage += HelpMessageOpt("-rpcthreads=<n>", strprintf(_("Set the number of threads to service RPC calls (default: %d)"), DEFAULT_HTTP_THREADS));