-rpcssl=1 option, allowing secure HTTPS JSON-RPC connections on OSX/Unix.

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@165 1a98c847-1fd6-4fd8-948a-caf3550aa51b

5 files changed, 139 insertions, 14 deletions

diff --git a/init.cpp b/init.cpp
index 45d79d71ba..94ba99d85f 100644
--- a/init.cpp
+++ b/init.cpp
@@ -175,8 +175,22 @@ bool AppInit2(int argc, char* argv[])
             "  -connect=<ip>   \t  " + _("Connect only to the specified node\n") +
             "  -server         \t  " + _("Accept command line and JSON-RPC commands\n") +
             "  -daemon         \t  " + _("Run in the background as a daemon and accept commands\n") +
+            "  -rpcuser        \t  " + _("Username for JSON-RPC connection\n") +
+            "  -rpcpassword    \t  " + _("Password for JSON-RPC connection\n") +
+            "  -rpcport=<port> \t  " + _("Listen for JSON-RPC connections on <port>\n") +
+            "  -rpcallowip=<ip>\t  " + _("Allow JSON-RPC connections from specified IP address\n") +
+            "  -rpcconnect=<ip>\t  " + _("Send commands to node running on <ip>\n") +
             "  -?              \t  " + _("This help message\n");
 
+#ifdef USE_SSL
+        strUsage += string() +
+            _("\nSSL options: (see the Bitcoin Wiki for SSL setup instructions)\n") +
+            "  -rpcssl=1                             \t  " + _("Use OpenSSL (https) for JSON-RPC connections\n") +
+            "  -rpcsslcertificatchainfile=<file.cert>\t  " + _("Server certificate file (default: server.cert)\n") +
+            "  -rpcsslprivatekeyfile=<file.pem>      \t  " + _("Server private key (default: server.pem)\n") +
+            "  -rpcsslciphers=<ciphers>              \t  " + _("Acceptable ciphers (default: TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!AH:!3DES:@STRENGTH)\n");
+#endif
+
 #if defined(__WXMSW__) && defined(GUI)
         // Tabs make the columns line up in the message box
         wxMessageBox(strUsage, "Bitcoin", wxOK);
diff --git a/makefile.osx b/makefile.osx
index 7894d055d2..8924172203 100644
--- a/makefile.osx
+++ b/makefile.osx
@@ -22,9 +22,10 @@ LIBS= -dead_strip \
  $(DEPSDIR)/lib/libboost_filesystem.a \
  $(DEPSDIR)/lib/libboost_program_options.a \
  $(DEPSDIR)/lib/libboost_thread.a \
+ $(DEPSDIR)/lib/libssl.a \
  $(DEPSDIR)/lib/libcrypto.a 
 
-DEFS=$(shell $(DEPSDIR)/bin/wx-config --cxxflags) -D__WXMAC_OSX__ -DNOPCH -DMSG_NOSIGNAL=0
+DEFS=$(shell $(DEPSDIR)/bin/wx-config --cxxflags) -D__WXMAC_OSX__ -DNOPCH -DMSG_NOSIGNAL=0 -DUSE_SSL
 
 DEBUGFLAGS=-g -DwxDEBUG_LEVEL=0
 # ppc doesn't work because we don't support big-endian
diff --git a/makefile.unix b/makefile.unix
index 21994154a4..aa85ef9a08 100644
--- a/makefile.unix
+++ b/makefile.unix
@@ -23,11 +23,12 @@ LIBS= \
    -l boost_program_options \
    -l boost_thread \
    -l db_cxx \
+   -l ssl \
    -l crypto \
  -Wl,-Bdynamic \
    -l gthread-2.0
 
-DEFS=-D__WXGTK__ -DNOPCH -DFOURWAYSSE2
+DEFS=-D__WXGTK__ -DNOPCH -DFOURWAYSSE2 -DUSE_SSL
 DEBUGFLAGS=-g -D__WXDEBUG__
 CFLAGS=-O2 -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 HEADERS=headers.h strlcpy.h serialize.h uint256.h util.h key.h bignum.h base58.h \
diff --git a/rpc.cpp b/rpc.cpp
index 19ec950040..88e44cc478 100644
--- a/rpc.cpp
+++ b/rpc.cpp
@@ -5,6 +5,12 @@
 #include "headers.h"
 #undef printf
 #include <boost/asio.hpp>
+#include <boost/iostreams/concepts.hpp>
+#include <boost/iostreams/stream.hpp>
+#ifdef USE_SSL
+#include <boost/asio/ssl.hpp> 
+typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> SSLStream;
+#endif
 #include "json/json_spirit_reader_template.h"
 #include "json/json_spirit_writer_template.h"
 #include "json/json_spirit_utils.h"
@@ -14,7 +20,7 @@
 // a certain size around 145MB.  If we need access to json_spirit outside this
 // file, we could use the compiled json_spirit option.
 
-using boost::asio::ip::tcp;
+using namespace boost::asio;
 using namespace json_spirit;
 
 void ThreadRPCServer2(void* parg);
@@ -777,7 +783,7 @@ string HTTPReply(int nStatus, const string& strMsg)
         strMsg.c_str());
 }
 
-int ReadHTTPStatus(tcp::iostream& stream)
+int ReadHTTPStatus(std::basic_istream<char>& stream)
 {
     string str;
     getline(stream, str);
@@ -788,7 +794,7 @@ int ReadHTTPStatus(tcp::iostream& stream)
     return atoi(vWords[1].c_str());
 }
 
-int ReadHTTPHeader(tcp::iostream& stream, map<string, string>& mapHeadersRet)
+int ReadHTTPHeader(std::basic_istream<char>& stream, map<string, string>& mapHeadersRet)
 {
     int nLen = 0;
     loop
@@ -812,7 +818,7 @@ int ReadHTTPHeader(tcp::iostream& stream, map<string, string>& mapHeadersRet)
     return nLen;
 }
 
-int ReadHTTP(tcp::iostream& stream, map<string, string>& mapHeadersRet, string& strMessageRet)
+int ReadHTTP(std::basic_istream<char>& stream, map<string, string>& mapHeadersRet, string& strMessageRet)
 {
     mapHeadersRet.clear();
     strMessageRet = "";
@@ -930,8 +936,59 @@ bool ClientAllowed(const string& strAddress)
     return false;
 }
 
+#ifdef USE_SSL
+//
+// IOStream device that speaks SSL but can also speak non-SSL
+//
+class SSLIOStreamDevice : public iostreams::device<iostreams::bidirectional> {
+public:
+    SSLIOStreamDevice(SSLStream &streamIn, bool fUseSSLIn) : stream(streamIn)
+    {
+        fUseSSL = fUseSSLIn;
+        fNeedHandshake = fUseSSLIn;
+    }
 
+    void handshake(ssl::stream_base::handshake_type role)
+    {
+        if (!fNeedHandshake) return;
+        fNeedHandshake = false;
+        stream.handshake(role);
+    }
+    std::streamsize read(char* s, std::streamsize n)
+    {
+        handshake(ssl::stream_base::server); // HTTPS servers read first
+        if (fUseSSL) return stream.read_some(asio::buffer(s, n));
+        return stream.next_layer().read_some(asio::buffer(s, n));
+    }
+    std::streamsize write(const char* s, std::streamsize n)
+    {
+        handshake(ssl::stream_base::client); // HTTPS clients write first
+        if (fUseSSL) return asio::write(stream, asio::buffer(s, n));
+        return asio::write(stream.next_layer(), asio::buffer(s, n));
+    }
+    bool connect(const std::string& server, const std::string& port)
+    {
+        ip::tcp::resolver resolver(stream.get_io_service());
+        ip::tcp::resolver::query query(server.c_str(), port.c_str());
+        ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
+        ip::tcp::resolver::iterator end;
+        boost::system::error_code error = asio::error::host_not_found;
+        while (error && endpoint_iterator != end)
+        {
+            stream.lowest_layer().close();
+            stream.lowest_layer().connect(*endpoint_iterator++, error);
+        }
+        if (error)
+            return false;
+        return true;
+    }
 
+private:
+    bool fNeedHandshake;
+    bool fUseSSL;
+    SSLStream& stream;
+};
+#endif
 
 void ThreadRPCServer(void* parg)
 {
@@ -972,18 +1029,54 @@ void ThreadRPCServer2(void* parg)
         return;
     }
 
-    // Bind to loopback 127.0.0.1 so the socket can only be accessed locally
-    boost::asio::io_service io_service;
-    tcp::endpoint endpoint(mapArgs.count("-rpcallowip") ? asio::ip::address_v4::any() : asio::ip::address_v4::loopback(), 8332);
-    tcp::acceptor acceptor(io_service, endpoint);
+    bool fUseSSL = (mapArgs.count("-rpcssl") > 0);
+    asio::ip::address bindAddress = mapArgs.count("-rpcallowip") ? asio::ip::address_v4::any() : asio::ip::address_v4::loopback();
+
+    asio::io_service io_service;
+    ip::tcp::endpoint endpoint(bindAddress, GetArg("-rpcport", 8332));
+    ip::tcp::acceptor acceptor(io_service, endpoint);
+
+#ifdef USE_SSL
+    ssl::context context(io_service, ssl::context::sslv23);
+    if (fUseSSL)
+    {
+        context.set_options(ssl::context::no_sslv2);
+        filesystem::path certfile = GetArg("-rpcsslcertificatechainfile", "server.cert");
+        if (!certfile.is_complete()) certfile = filesystem::path(GetDataDir()) / certfile;
+        if (filesystem::exists(certfile)) context.use_certificate_chain_file(certfile.string().c_str());
+        else printf("ThreadRPCServer ERROR: missing server certificate file %s\n", certfile.string().c_str());
+        filesystem::path pkfile = GetArg("-rpcsslprivatekeyfile", "server.pem");
+        if (!pkfile.is_complete()) pkfile = filesystem::path(GetDataDir()) / pkfile;
+        if (filesystem::exists(pkfile)) context.use_private_key_file(pkfile.string().c_str(), ssl::context::pem);
+        else printf("ThreadRPCServer ERROR: missing server private key file %s\n", pkfile.string().c_str());
+
+        string ciphers = GetArg("-rpcsslciphers",
+                                         "TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!AH:!3DES:@STRENGTH");
+        SSL_CTX_set_cipher_list(context.impl(), ciphers.c_str());
+    }
+#else
+    if (fUseSSL)
+        throw runtime_error("-rpcssl=true, but bitcoin compiled without full openssl libraries.");
+#endif
 
     loop
     {
         // Accept connection
-        tcp::iostream stream;
-        tcp::endpoint peer;
+#ifdef USE_SSL
+        SSLStream sslStream(io_service, context);
+        SSLIOStreamDevice d(sslStream, fUseSSL);
+        iostreams::stream<SSLIOStreamDevice> stream(d);
+#else
+        ip::tcp::iostream stream;
+#endif
+
+        ip::tcp::endpoint peer;
         vnThreadsRunning[4]--;
+#ifdef USE_SSL
+        acceptor.accept(sslStream.lowest_layer(), peer);
+#else
         acceptor.accept(*stream.rdbuf(), peer);
+#endif
         vnThreadsRunning[4]++;
         if (fShutdown)
             return;
@@ -1102,9 +1195,25 @@ Object CallRPC(const string& strMethod, const Array& params)
                 GetConfigFile().c_str()));
 
     // Connect to localhost
-    tcp::iostream stream(GetArg("-rpcconnect", "127.0.0.1"), "8332");
+    bool fUseSSL = (mapArgs.count("-rpcssl") > 0);
+#ifdef USE_SSL
+    asio::io_service io_service;
+    ssl::context context(io_service, ssl::context::sslv23);
+    context.set_options(ssl::context::no_sslv2);
+    SSLStream sslStream(io_service, context);
+    SSLIOStreamDevice d(sslStream, fUseSSL);
+    iostreams::stream<SSLIOStreamDevice> stream(d);
+    if (!d.connect(GetArg("-rpcconnect", "127.0.0.1"), GetArg("-rpcport", "8332")))
+        throw runtime_error("couldn't connect to server");
+#else
+    if (fUseSSL)
+        throw runtime_error("-rpcssl=true, but bitcoin compiled without full openssl libraries.");
+
+    ip::tcp::iostream stream(GetArg("-rpcconnect", "127.0.0.1"), GetArg("-rpcport", "8332"));
     if (stream.fail())
         throw runtime_error("couldn't connect to server");
+#endif
+
 
     // HTTP basic authentication
     string strUserPass64 = EncodeBase64(mapArgs["-rpcuser"] + ":" + mapArgs["-rpcpassword"]);
diff --git a/serialize.h b/serialize.h
index fde83e7a81..d6e715d468 100644
--- a/serialize.h
+++ b/serialize.h
@@ -22,7 +22,7 @@ class CDataStream;
 class CAutoFile;
 static const unsigned int MAX_SIZE = 0x02000000;
 
-static const int VERSION = 31303;
+static const int VERSION = 31304;
 static const char* pszSubVer = "";