private static void RetrieveArgon2Parameters(string filePath, ref string memorySize, ref string iterations)
{
try
{
// Read the first line of the file
using (var streamReader = new StreamReader(filePath, true))
{
string firstLine = streamReader.ReadLine();
int memorySizeIndex = firstLine.IndexOf(Constants.MemorySizeFlag, StringComparison.Ordinal);
if (memorySizeIndex != -1)
{
int iterationsIndex = firstLine.IndexOf(Constants.IterationsFlag, StringComparison.Ordinal);
int endIndex = firstLine.IndexOf(Constants.EndFlag, StringComparison.Ordinal);
// If the strings are found on the line
if (memorySizeIndex != -1 && iterationsIndex != -1 && endIndex != -1)
{
memorySize = firstLine.Substring(memorySizeIndex, iterationsIndex - memorySizeIndex);
iterations = firstLine.Substring(iterationsIndex, endIndex - iterationsIndex);
}
}
}
}
catch (Exception ex) when(ExceptionFilters.FileAccessExceptions(ex) || ExceptionFilters.CharacterEncodingExceptions(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.High);
DisplayMessage.ErrorResultsText(filePath, ex.GetType().Name, "Unable to read Argon2 parameters from the file.");
}
}
private static int GetFileNameLength(string filePath, string originalFileName)
{
try
{
EncodeFileName(filePath, originalFileName, out byte[] newLineBytes, out byte[] fileNameBytes);
return(newLineBytes.Length + fileNameBytes.Length);
}
catch (Exception ex) when(ExceptionFilters.CharacterEncodingExceptions(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.High);
DisplayMessage.ErrorResultsText(filePath, ex.GetType().Name, "Unable to remove the original file name stored in the file. The length of the stored file name could not be calculated.");
return(0);
}
}
private static (byte[], byte[], byte[]) GetParametersBytes(string memorySize, string iterations)
{
try
{
Encoding encoding = Encoding.UTF8;
byte[] memorySizeBytes = encoding.GetBytes(memorySize);
byte[] iterationsBytes = encoding.GetBytes(iterations);
byte[] endFlagBytes = encoding.GetBytes(Constants.EndFlag);
return(memorySizeBytes, iterationsBytes, endFlagBytes);
}
catch (Exception ex) when(ExceptionFilters.CharacterEncodingExceptions(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.High);
DisplayMessage.ErrorResultsText(string.Empty, ex.GetType().Name, "Unable to convert Argon2 parameters to bytes.");
return(null, null, null);
}
}