Sanitize command strings before logging them.

Normally bitcoin core does not display any network originated strings without
 sanitizing or hex encoding.  This wasn't done for strcommand in many places.

This could be used to play havoc with a terminal displaying the logs,
 especially with printtoconsole in use.

Thanks to Evil-Knievel for reporting this issue.

Conflicts:
	src/main.cpp

3 files changed, 10 insertions, 10 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 4a95bb1156..ce7c1277ad 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3422,7 +3422,7 @@ void static ProcessGetData(CNode* pfrom)
 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived)
 {
     RandAddSeedPerfmon();
-    LogPrint("net", "received: %s (%u bytes) peer=%d\n", strCommand, vRecv.size(), pfrom->id);
+    LogPrint("net", "received: %s (%u bytes) peer=%d\n", SanitizeString(strCommand), vRecv.size(), pfrom->id);
     if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
     {
         LogPrintf("dropmessagestest DROPPING RECV MESSAGE\n");
@@ -4255,7 +4255,7 @@ bool ProcessMessages(CNode* pfrom)
 
         // Scan for message start
         if (memcmp(msg.hdr.pchMessageStart, Params().MessageStart(), MESSAGE_START_SIZE) != 0) {
-            LogPrintf("PROCESSMESSAGE: INVALID MESSAGESTART %s peer=%d\n", msg.hdr.GetCommand(), pfrom->id);
+            LogPrintf("PROCESSMESSAGE: INVALID MESSAGESTART %s peer=%d\n", SanitizeString(msg.hdr.GetCommand()), pfrom->id);
             fOk = false;
             break;
         }
@@ -4264,7 +4264,7 @@ bool ProcessMessages(CNode* pfrom)
         CMessageHeader& hdr = msg.hdr;
         if (!hdr.IsValid())
         {
-            LogPrintf("PROCESSMESSAGE: ERRORS IN HEADER %s peer=%d\n", hdr.GetCommand(), pfrom->id);
+            LogPrintf("PROCESSMESSAGE: ERRORS IN HEADER %s peer=%d\n", SanitizeString(hdr.GetCommand()), pfrom->id);
             continue;
         }
         string strCommand = hdr.GetCommand();
@@ -4279,8 +4279,8 @@ bool ProcessMessages(CNode* pfrom)
         memcpy(&nChecksum, &hash, sizeof(nChecksum));
         if (nChecksum != hdr.nChecksum)
         {
-            LogPrintf("ProcessMessages(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
-               strCommand, nMessageSize, nChecksum, hdr.nChecksum);
+            LogPrintf("ProcessMessages(%s, %u bytes): CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
+               SanitizeString(strCommand), nMessageSize, nChecksum, hdr.nChecksum);
             continue;
         }
 
@@ -4297,12 +4297,12 @@ bool ProcessMessages(CNode* pfrom)
             if (strstr(e.what(), "end of data"))
             {
                 // Allow exceptions from under-length message on vRecv
-                LogPrintf("ProcessMessages(%s, %u bytes) : Exception '%s' caught, normally caused by a message being shorter than its stated length\n", strCommand, nMessageSize, e.what());
+                LogPrintf("ProcessMessages(%s, %u bytes): Exception '%s' caught, normally caused by a message being shorter than its stated length\n", SanitizeString(strCommand), nMessageSize, e.what());
             }
             else if (strstr(e.what(), "size too large"))
             {
                 // Allow exceptions from over-long size
-                LogPrintf("ProcessMessages(%s, %u bytes) : Exception '%s' caught\n", strCommand, nMessageSize, e.what());
+                LogPrintf("ProcessMessages(%s, %u bytes): Exception '%s' caught\n", SanitizeString(strCommand), nMessageSize, e.what());
             }
             else
             {
@@ -4319,7 +4319,7 @@ bool ProcessMessages(CNode* pfrom)
         }
 
         if (!fRet)
-            LogPrintf("ProcessMessage(%s, %u bytes) FAILED peer=%d\n", strCommand, nMessageSize, pfrom->id);
+            LogPrintf("ProcessMessage(%s, %u bytes) FAILED peer=%d\n", SanitizeString(strCommand), nMessageSize, pfrom->id);
 
         break;
     }
diff --git a/src/net.cpp b/src/net.cpp
index 42b3c30fb7..5c8ff79702 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -2021,7 +2021,7 @@ void CNode::BeginMessage(const char* pszCommand) EXCLUSIVE_LOCK_FUNCTION(cs_vSen
     ENTER_CRITICAL_SECTION(cs_vSend);
     assert(ssSend.size() == 0);
     ssSend << CMessageHeader(pszCommand, 0);
-    LogPrint("net", "sending: %s ", pszCommand);
+    LogPrint("net", "sending: %s ", SanitizeString(pszCommand));
 }
 
 void CNode::AbortMessage() UNLOCK_FUNCTION(cs_vSend)
diff --git a/src/rpcserver.cpp b/src/rpcserver.cpp
index 6db2b0421f..37e4f48a3d 100644
--- a/src/rpcserver.cpp
+++ b/src/rpcserver.cpp
@@ -820,7 +820,7 @@ void JSONRequest::parse(const Value& valRequest)
         throw JSONRPCError(RPC_INVALID_REQUEST, "Method must be a string");
     strMethod = valMethod.get_str();
     if (strMethod != "getblocktemplate")
-        LogPrint("rpc", "ThreadRPCServer method=%s\n", strMethod);
+        LogPrint("rpc", "ThreadRPCServer method=%s\n", SanitizeString(strMethod));
 
     // Parse params
     Value valParams = find_value(request, "params");