Clamav 0 102 2

Send byte stream across machine boundaries. // Receive byte stream from beyond machine boundaries. Console.WriteLine(BitConverter.ToString(bytes)); if (BitConverter.IsLittleEndian) Array.Reverse(bytes); Console.WriteLine(BitConverter.ToString(bytes)); int result = BitConverter.ToInt32(bytes, 0); Console.WriteLine("Original value: {0}", value); Console.WriteLine("Returned value: {0}", result); }}// The example displays the following output on a little-endian system:// 4E-61-BC-00// 00-BC-61-4E// 00-BC-61-4E// 4E-61-BC-00// Original value: 12345678// Returned value: 12345678Here is a complete clamav client wrapper written in C# ... #L238-L294htonl is the equivalent for "network-byte-order" in c++ as it seemsYou use either (newline escaped/delimited)or (zero escaped/delimited)workflow:1. send the INSTREAM command: zINSTREAM\0, or nINSTREAM\n2. send (big endian, 4 bytes)3. send the chunk of data corresponding to the above length4. repeat at 2 as long as you have more blocks to send5. send a 0-length block to mark end of stream6. get response CIDR to RegEx: d-fault.nl/cidrtoregexDNS Lookup: d-fault.nl/dnstoolsDKIM Generator: d-fault.nl/dkimgeneratorDNSBL Lookup: d-fault.nl/dnsbllookupGEOIP Lookup: d-fault.nl/geoiplookup SorenR Senior user Posts: 6413 Joined: 2006-08-21 15:38 Location: Denmark Re: BUG: ClamAV 0.104.0 does not work Post by SorenR » 2022-02-10 13:53 RvdH wrote: 2022-02-10 09:36Here is a complete clamav client wrapper written in C# ... #L238-L294htonl is the equivalent for "network-byte-order" in c++ as it seemsYou use either (newline escaped/delimited)or (zero escaped/delimited)workflow:1. send the INSTREAM command: zINSTREAM\0, or nINSTREAM\n2. send (big endian, 4 bytes)3. send the chunk of data corresponding to the above length4. repeat at 2 as long as you have more blocks to send5. send a 0-length block to mark end of stream6. get responseHmm... Something's fishy...ClamAV log:Code: Select allThu Feb 10 12:40:20 2022 -> WARNING: INSTREAM: Size limit reached, (requested: 842019123, max: 26214400)Thu Feb 10 12:40:20 2022 -> WARNING: INSTREAM: Size limit reached, (requested: 842019123, max: 26214400)Code change...Code: Select all VirusScanningResult ClamAVVirusScanner::Scan(const String &hostName, int primaryPort, const String &sFilename) { LOG_DEBUG("Connecting to ClamAV virus scanner..."); int streamPort = 0; TimeoutCalculator calculator; SynchronousConnection commandConnection(calculator.Calculate(IniFileSettings::Instance()->GetClamMinTimeout(), IniFileSettings::Instance()->GetClamMaxTimeout())); if (!commandConnection.Connect(hostName, primaryPort)) { return VirusScanningResult(_T("ClamAVVirusScanner::Scan"), Formatter::Format("Unable to connect to ClamAV server at {0}:{1}.", hostName, primaryPort)); } if (!commandConnection.Write("nINSTREAM\n")) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write STREAM command."); AnsiString readData; // Send the file on the stream socket. File oFile; if (!oFile.Open(sFilename, File::OTReadOnly)) { String sErrorMsg = Formatter::Format("Could not send file {0} via socket since it

Returned value: 12345678Here is a complete clamav client wrapper written in C# ... #L238-L294htonl is the equivalent for "network-byte-order" in c++ as it seemsYou use either (newline escaped/delimited)or (zero escaped/delimited)workflow:1. send the INSTREAM command: zINSTREAM\0, or nINSTREAM\n2. send (big endian, 4 bytes)3. send the chunk of data corresponding to the above length4. repeat at 2 as long as you have more blocks to send5. send a 0-length block to mark end of stream6. get response CIDR to RegEx: d-fault.nl/cidrtoregexDNS Lookup: d-fault.nl/dnstoolsDKIM Generator: d-fault.nl/dkimgeneratorDNSBL Lookup: d-fault.nl/dnsbllookupGEOIP Lookup: d-fault.nl/geoiplookup SorenR Senior user Posts: 6414 Joined: 2006-08-21 15:38 Location: Denmark Re: BUG: ClamAV 0.104.0 does not work Post by SorenR » 2022-02-10 13:53 RvdH wrote: 2022-02-10 09:36Here is a complete clamav client wrapper written in C# ... #L238-L294htonl is the equivalent for "network-byte-order" in c++ as it seemsYou use either (newline escaped/delimited)or (zero escaped/delimited)workflow:1. send the INSTREAM command: zINSTREAM\0, or nINSTREAM\n2. send (big endian, 4 bytes)3. send the chunk of data corresponding to the above length4. repeat at 2 as long as you have more blocks to send5. send a 0-length block to mark end of stream6. get responseHmm... Something's fishy...ClamAV log:Code: Select allThu Feb 10 12:40:20 2022 -> WARNING: INSTREAM: Size limit reached, (requested: 842019123, max: 26214400)Thu Feb 10 12:40:20 2022 -> WARNING: INSTREAM: Size limit reached, (requested: 842019123, max: 26214400)Code change...Code: Select all VirusScanningResult ClamAVVirusScanner::Scan(const String &hostName, int primaryPort, const String &sFilename) { LOG_DEBUG("Connecting to ClamAV virus scanner..."); int streamPort = 0; TimeoutCalculator calculator; SynchronousConnection commandConnection(calculator.Calculate(IniFileSettings::Instance()->GetClamMinTimeout(), IniFileSettings::Instance()->GetClamMaxTimeout())); if (!commandConnection.Connect(hostName, primaryPort)) { return VirusScanningResult(_T("ClamAVVirusScanner::Scan"), Formatter::Format("Unable to connect to ClamAV server at {0}:{1}.", hostName, primaryPort)); } if (!commandConnection.Write("nINSTREAM\n")) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write STREAM command."); AnsiString readData; // Send the file on the stream socket. File oFile; if (!oFile.Open(sFilename, File::OTReadOnly)) { String sErrorMsg = Formatter::Format("Could not send file {0} via socket since it does not exist.", sFilename); return VirusScanningResult("ClamAVVirusScanner::Scan", sErrorMsg); } const int STREAM_BLOCK_SIZE = 4096; const int maxIterations = 100000; for (int i = 0; i pBuf = oFile.ReadChunk(STREAM_BLOCK_SIZE); if (!pBuf) break; // Send the request. if (!commandConnection.Write(to_string(htonl(sizeof(*pBuf))))) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write data to stream port."); if (!commandConnection.Write(*pBuf)) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write data to stream port."); } if (!commandConnection.Write(to_string(htonl(0)))) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write data to stream port."); if (!commandConnection.ReadUntil("\n", readData)) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to read response (after streaming)."); readData.TrimRight("\n"); // Parse the response and see if a virus was reported. try { const regex expression("^stream.*: (.*) FOUND$"); cmatch what;

Trying to figure out the Perl pack function ... INSTREAMIt is mandatory to prefix this command with n or z.Scan a stream of data. The stream is sent to clamd in chunks, after INSTREAM, on the same socket on which the command was sent. This avoids the overhead of establishing new TCP connections and problems with NAT. The format of the chunk is: '' where is the size of the following data in bytes expressed as a 4 byte unsigned integer in network byte order and is the actual chunk. Streaming is terminated by sending a zero-length chunk. Note: do not exceed StreamMaxLength as defined in clamd.conf, otherwise clamd will reply with INSTREAM size limit exceeded and close the connection.NB. This is C#...Code: Select allusing System;public class Example{ public static void Main() { int value = 12345678; byte[] bytes = BitConverter.GetBytes(value); Console.WriteLine(BitConverter.ToString(bytes)); if (BitConverter.IsLittleEndian) Array.Reverse(bytes); Console.WriteLine(BitConverter.ToString(bytes)); // Call method to send byte stream across machine boundaries. // Receive byte stream from beyond machine boundaries. Console.WriteLine(BitConverter.ToString(bytes)); if (BitConverter.IsLittleEndian) Array.Reverse(bytes); Console.WriteLine(BitConverter.ToString(bytes)); int result = BitConverter.ToInt32(bytes, 0); Console.WriteLine("Original value: {0}", value); Console.WriteLine("Returned value: {0}", result); }}// The example displays the following output on a little-endian system:// 4E-61-BC-00// 00-BC-61-4E// 00-BC-61-4E// 4E-61-BC-00// Original value: 12345678// Returned value: 12345678Here is a complete clamav client wrapper written in C# ... #L238-L294htonl is the equivalent for "network-byte-order" in c++ as it seemsYou use either (newline escaped/delimited)or (zero escaped/delimited)workflow:1. send the INSTREAM command: zINSTREAM\0, or nINSTREAM\n2. send (big endian, 4 bytes)3. send the chunk of data corresponding to the above length4. repeat at 2 as long as you have more blocks to send5. send a 0-length block to mark end of stream6. get response CIDR to RegEx: d-fault.nl/cidrtoregexDNS Lookup: d-fault.nl/dnstoolsDKIM Generator: d-fault.nl/dkimgeneratorDNSBL Lookup: d-fault.nl/dnsbllookupGEOIP Lookup: d-fault.nl/geoiplookup SorenR Senior user Posts: 6413 Joined: 2006-08-21 15:38 Location: Denmark Re: BUG: ClamAV 0.104.0 does not work Post by SorenR » 2022-02-10 13:53 RvdH wrote: 2022-02-10 09:36Here is a complete clamav client wrapper written in C# ... #L238-L294htonl is the equivalent for "network-byte-order" in c++ as it seemsYou use either (newline escaped/delimited)or (zero escaped/delimited)workflow:1. send the INSTREAM command: zINSTREAM\0, or nINSTREAM\n2. send (big endian, 4 bytes)3. send the chunk of data corresponding to the above length4. repeat at 2 as long as you have more blocks to send5. send a 0-length block to mark end of stream6. get responseHmm... Something's fishy...ClamAV log:Code: Select allThu Feb 10 12:40:20 2022 -> WARNING: INSTREAM: Size limit reached, (requested: 842019123, max: 26214400)Thu Feb 10 12:40:20 2022 -> WARNING: INSTREAM: Size limit reached, (requested: 842019123, max: 26214400)Code change...Code: Select all VirusScanningResult ClamAVVirusScanner::Scan(const String &hostName, int primaryPort, const String &sFilename) { LOG_DEBUG("Connecting to ClamAV virus scanner..."); int streamPort = 0; TimeoutCalculator calculator; SynchronousConnection commandConnection(calculator.Calculate(IniFileSettings::Instance()->GetClamMinTimeout(), IniFileSettings::Instance()->GetClamMaxTimeout())); if (!commandConnection.Connect(hostName, primaryPort)) { return VirusScanningResult(_T("ClamAVVirusScanner::Scan"), Formatter::Format("Unable to connect to ClamAV server at {0}:{1}.", hostName, primaryPort)); } if (!commandConnection.Write("nINSTREAM\n")) return VirusScanningResult("ClamAVVirusScanner::Scan", "Unable to write STREAM command."); AnsiString readData; // Send the file on the stream socket. File oFile; if (!oFile.Open(sFilename, File::OTReadOnly)) { String sErrorMsg = Formatter::Format("Could not send file {0} via socket since it