private void ProcessRequest(Options commandLineOptions)
{
StreamHasher fileHashMaker;
switch (commandLineOptions.HashAgorithm.ToUpper())
{
case "MD160":
fileHashMaker = new MD160Hasher();
break;
case "SHA1":
fileHashMaker = new SHA1Hasher();
break;
case "SHA256":
fileHashMaker = new SHA256Hasher();
break;
case "SHA384":
fileHashMaker = new SHA384Hasher();
break;
case "SHA512":
fileHashMaker = new SHA512Hasher();
break;
case "MD5":
default:
fileHashMaker = new MD5Hasher();
break;
}
List<String[]> inputFiles = new List<String[]>();
if (commandLineOptions.Concatenate)
{
// Files will be treated as a single stream -
// copy all filenames into a string array,
// then add the array to the List
String[] files = new String[commandLineOptions.Items.Count];
for (int loop = 0; loop < commandLineOptions.Items.Count; loop++)
{
files[loop] = commandLineOptions.Items[loop];
}
inputFiles.Add(files);
}
else
{
// Each file treated as a separate entity -
// copy each filename into a separate string array,
// then add each array to the List
foreach (String fileToProcess in commandLineOptions.Items)
{
String[] file = new String[] { fileToProcess };
inputFiles.Add(file);
}
}
foreach (String[] fileEntry in inputFiles)
{
byte[] fileHash = fileHashMaker.ComputeFileHash(fileEntry, (int)commandLineOptions.BlockSize);
Console.WriteLine(commandLineOptions.HashAgorithm.ToUpper() + ": " + BitConverter.ToString(fileHash));
}
}
static void Main(string[] args)
{
Options commandLineOptions = new Options();
ICommandLineParser commandParser = new CommandLineParser();
if (commandParser.ParseArguments(args, commandLineOptions, Console.Error))
{
if (ValidateOptions(commandLineOptions))
{
RequestProcessor procesor = new RequestProcessor(commandLineOptions);
}
}
else
{
// Command line params could not be parsed,
// or help was requested
Environment.ExitCode = -1;
}
}
public RequestProcessor(Options commandLineOptions)
{
ProcessRequest(commandLineOptions);
}
private static bool ValidateOptions(Options commandLineOptions)
{
bool validatedOK = false;
String errorMessage = null;
if (commandLineOptions.BlockSize >= 512)
{
switch (commandLineOptions.HashAgorithm.ToUpper())
{
case "MD5":
case "MD160":
case "SHA1":
case "SHA256":
case "SHA384":
case "SHA512":
if (commandLineOptions.Items.Count > 0)
{
// Make sure all the files exist and
// are accessible
String fileNotFoundMessage = null;
foreach (String inputItem in commandLineOptions.Items)
{
try
{
using (FileStream inputFile = new FileStream(inputItem, FileMode.Open, FileAccess.Read))
{
inputFile.Close();
}
}
catch
{
fileNotFoundMessage = String.Format(messageFileNotFound, inputItem);
break;
}
}
if (String.IsNullOrEmpty(fileNotFoundMessage))
{ validatedOK = true; }
else
{ errorMessage = fileNotFoundMessage; }
}
else
{
errorMessage = messageNoInputFileSpecifed;
}
break;
default:
errorMessage = messageUnknownAlgorithm;
break;
}
}
else
{
errorMessage = messageMinimumBlockSize;
}
if (!String.IsNullOrEmpty(errorMessage))
{
Console.Error.WriteLine(errorMessage);
Environment.ExitCode = 1;
}
return validatedOK;
}