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csotto.cs
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csotto.cs
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using System;
using System.IO;
using System.Runtime.InteropServices;
namespace csotto;
internal class Csotto : IDisposable
{
private readonly IntPtr instance;
private readonly IntPtr certificateHandle;
private IntPtr contentHandle;
private IntPtr downloadHandle;
private bool disposed;
public Csotto(string pathLog, string pathCertificate, string certificatePassword)
{
// Create instance
OttoStatusCode statusCodeInstanceCreate = OttoInstanzErzeugen(pathLog, IntPtr.Zero, IntPtr.Zero, out instance);
if (statusCodeInstanceCreate != OttoStatusCode.OTTO_OK)
{
Error("Could not create an Otto instance. Check otto.log for details.", statusCodeInstanceCreate);
}
// Open certificate
OttoStatusCode statusCodeCertificateOpen = OttoZertifikatOeffnen(instance, pathCertificate, certificatePassword, out certificateHandle);
if (statusCodeCertificateOpen != OttoStatusCode.OTTO_OK)
{
Error("Could not open certificate: " + pathCertificate, statusCodeCertificateOpen);
}
Console.WriteLine("[INFO] Using certificate path: " + pathCertificate);
}
public int Workflow(string objectUuid, string developerId, string fileExtension, string pathDownload)
{
// Start download
OttoStatusCode statusCodeDownloadStart = OttoEmpfangBeginnen(instance, objectUuid, certificateHandle, developerId, out downloadHandle);
if (statusCodeDownloadStart != OttoStatusCode.OTTO_OK)
{
return Error("Could not start download. Check otto.log", statusCodeDownloadStart);
}
// Create content buffer
OttoStatusCode statusCodeContentHandleCreate = OttoRueckgabepufferErzeugen(instance, out contentHandle);
if (statusCodeContentHandleCreate != OttoStatusCode.OTTO_OK)
{
return Error("Could not create handle for content.", statusCodeContentHandleCreate);
}
string filepath = Path.Combine(pathDownload, objectUuid + "." + fileExtension);
FileStream file;
try
{
file = File.Open(filepath, FileMode.Append, FileAccess.Write, FileShare.None);
}
catch (Exception ex)
{
Console.WriteLine("Failed to open file: " + filepath);
Console.WriteLine("Exception: " + ex.Message);
return (int)CsottoReturnCode.OUTPUT_FILE_OPEN_FAILED;
}
// Continue download
OttoStatusCode statusCodeDownloadContinue = OttoStatusCode.OTTO_UNBEKANNTER_FEHLER;
do
{
statusCodeDownloadContinue = OttoEmpfangFortsetzen(downloadHandle, contentHandle);
if (statusCodeDownloadContinue != OttoStatusCode.OTTO_OK)
{
break;
}
ulong contentSize = OttoRueckgabepufferGroesse(contentHandle);
if (contentSize <= 0)
{
break;
}
Console.WriteLine("[INFO] Downloaded: " + contentSize + " bytes");
byte[] contentBlock = new byte[contentSize];
Marshal.Copy(OttoRueckgabepufferInhalt(contentHandle), contentBlock, 0, (int)contentSize);
file.Write(contentBlock, 0, (int)contentSize);
} while (true);
file.Close();
if (statusCodeDownloadContinue != OttoStatusCode.OTTO_OK)
{
File.Delete(filepath);
return DownloadError(statusCodeDownloadContinue);
}
Console.WriteLine("[INFO] Downloaded content saved in: " + filepath);
return (int)CsottoReturnCode.OK;
}
private static int Error(string message, OttoStatusCode code)
{
Console.WriteLine("[ERROR] " + message);
Console.WriteLine("[CODE] " + (int)code + " (" + code + ")");
return (int)code;
}
private static int DownloadError(OttoStatusCode code)
{
string message = code switch
{
OttoStatusCode.OTTO_TRANSFER_UNAUTHORIZED => "The client is not allowed to use the API.",
OttoStatusCode.OTTO_TRANSFER_NOT_FOUND => "The OTTER server did not find the object.",
_ => "Error occurred while downloading. Check otto.log for details."
};
return Error(message, code);
}
~Csotto()
{
Dispose();
}
public void Dispose()
{
if (disposed)
{
return;
}
// End download
if (downloadHandle != IntPtr.Zero)
{
OttoStatusCode statusCodeDownloadEnd = OttoEmpfangBeenden(downloadHandle);
if (statusCodeDownloadEnd != OttoStatusCode.OTTO_OK)
{
Error("Could not end download.", statusCodeDownloadEnd);
}
}
// Close certificate
if (certificateHandle != IntPtr.Zero)
{
OttoStatusCode statusCodeCertificateClose = OttoZertifikatSchliessen(certificateHandle);
if (statusCodeCertificateClose != OttoStatusCode.OTTO_OK)
{
Error("Could not close certificate handle", statusCodeCertificateClose);
}
}
// Release content buffer
if (contentHandle != IntPtr.Zero)
{
OttoStatusCode statusCodeContentRelease = OttoRueckgabepufferFreigeben(contentHandle);
if (statusCodeContentRelease != OttoStatusCode.OTTO_OK)
{
Error("Could not release content handle.", statusCodeContentRelease);
}
}
// Destroy instance
if (instance != IntPtr.Zero)
{
OttoStatusCode statusCodeInstanceDestroy = OttoInstanzFreigeben(instance);
if (statusCodeInstanceDestroy != OttoStatusCode.OTTO_OK)
{
Error("Could not destroy the Otto instance. Check otto.log for details.", statusCodeInstanceDestroy);
}
}
disposed = true;
}
[DllImport("otto", CharSet = CharSet.Ansi, BestFitMapping = true,
ThrowOnUnmappableChar = false, CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoInstanzErzeugen(
[MarshalAs(UnmanagedType.LPStr)] string logPfad,
IntPtr logCallback,
IntPtr logCallbackBenutzerdaten,
out IntPtr instanz);
[DllImport("otto", CharSet = CharSet.Ansi, BestFitMapping = true,
ThrowOnUnmappableChar = false, CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoZertifikatOeffnen(
IntPtr instanz,
[MarshalAs(UnmanagedType.LPStr)] string zertifikatsPfad,
[MarshalAs(UnmanagedType.LPStr)] string zertifikatsPasswort,
out IntPtr zertifikat);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoEmpfangBeginnen(
IntPtr instanz,
[MarshalAs(UnmanagedType.LPStr)] string objektId,
IntPtr zertifikat,
[MarshalAs(UnmanagedType.LPStr)] string herstellerId,
out IntPtr empfang);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoRueckgabepufferErzeugen(
IntPtr instanz,
out IntPtr rueckgabepuffer);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern ulong OttoRueckgabepufferGroesse(IntPtr rueckgabepuffer);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern IntPtr OttoRueckgabepufferInhalt(IntPtr rueckgabepuffer);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoEmpfangFortsetzen(
IntPtr empfang,
IntPtr datenBlock);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoEmpfangBeenden(IntPtr empfang);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoZertifikatSchliessen(IntPtr zertifikat);
[DllImport("otto", CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoRueckgabepufferFreigeben(IntPtr rueckgabepuffer);
[DllImport("otto", CharSet = CharSet.Ansi, BestFitMapping = true,
ThrowOnUnmappableChar = false, CallingConvention = CallingConvention.StdCall)]
private static extern OttoStatusCode OttoInstanzFreigeben(IntPtr instanz);
}
public enum OttoStatusCode
{
OTTO_OK = 0,
OTTO_UNBEKANNTER_FEHLER = 610401002,
OTTO_TRANSFER_UNAUTHORIZED = 610403007,
OTTO_TRANSFER_NOT_FOUND = 610403008,
}
public enum CsottoReturnCode
{
OK = 0,
TOO_FEW_ARGUMENTS = 1,
UNSUPPORTED_ARGUMENT = 2,
OBJECT_UUID_MISSING = 3,
DEVELOPER_ID_MISSING = 4,
FILE_EXISTS = 5,
OUTPUT_FILE_OPEN_FAILED = 6,
}
internal static class Program
{
private static int Main(string[] args)
{
if (args.Length < 2)
{
Console.Error.WriteLine("Usage:");
Console.Error.WriteLine(" -u objectUuid\t\tUUID of object to download (mandatory)");
Console.Error.WriteLine(" -e extension\t\tSet filename extension of downloaded content [default: \"txt\"]");
Console.Error.WriteLine(" -p password\t\tPassword for certificate [default: \"123456\"]");
Console.Error.WriteLine(" -f\t\t\tForce file overwriting [default: false]");
return (int)CsottoReturnCode.TOO_FEW_ARGUMENTS;
}
string objectUuid = null;
string fileExtension = "txt";
string certificatePassword = "123456";
bool forceOverwrite = false;
for (int i = 0; i < args.Length; i++)
{
switch (args[i])
{
case "-u":
objectUuid = args[++i];
break;
case "-e":
fileExtension = args[++i];
break;
case "-p":
certificatePassword = args[++i];
break;
case "-f":
forceOverwrite = true;
break;
default:
Console.Error.WriteLine("Unsupported option: -" + args[i]);
return (int)CsottoReturnCode.UNSUPPORTED_ARGUMENT;
}
}
if (objectUuid == null)
{
Console.Error.WriteLine("Object UUID is missing. Please provide it with the -u flag.");
return (int)CsottoReturnCode.OBJECT_UUID_MISSING;
}
string pathDownload = Environment.GetEnvironmentVariable("PATH_DOWNLOAD") ?? ".";
string filepath = Path.Combine(pathDownload, objectUuid + "." + fileExtension);
if (File.Exists(filepath))
{
if (forceOverwrite)
{
File.Delete(filepath);
}
else
{
Console.WriteLine("File: " + filepath + " already exists. Do you want to overwrite it? (y/n)");
char userChoice = (char)Console.Read();
if (userChoice is 'y' or 'Y')
{
File.Delete(filepath);
}
else
{
Console.Error.WriteLine("File: " + filepath + " was not overwritten. Stopping.");
return (int)CsottoReturnCode.FILE_EXISTS;
}
}
}
string developerId = Environment.GetEnvironmentVariable("DEVELOPER_ID");
if (string.IsNullOrEmpty(developerId))
{
Console.Error.WriteLine("DEVELOPER_ID environment variable missing. Please set it accordingly.");
return (int)CsottoReturnCode.DEVELOPER_ID_MISSING;
}
string pathCertificate = Environment.GetEnvironmentVariable("PATH_CERTIFICATE") ?? "certificate/test-softorg-pse.pfx";
string pathLog = Environment.GetEnvironmentVariable("PATH_LOG") ?? ".";
Csotto csotto = new Csotto(pathLog, pathCertificate, certificatePassword);
int result = csotto.Workflow(objectUuid, developerId, fileExtension, pathDownload);
csotto.Dispose();
return result;
}
}