public ModularCrypt(char delim,
string identifier,
int workFactor,
byte[] salt,
byte[] cipher)
{
if (INVALID_DELIM_ALPHABET.Contains(delim))
{
throw new ArgumentException("Invalid delim character.", "modularCryptFormatStr");
}
if (identifier == null)
{
throw new ArgumentException("Cannot be null.", "identifier");
}
if (workFactor < 0)
{
throw new ArgumentException("Must be a non-negative integer.", "workFactor");
}
if (salt == null)
{
throw new ArgumentException("Cannot be null.", "salt");
}
_delim = delim;
_identifier = identifier;
_workFactor = workFactor;
_salt = salt;
_cipher = cipher;
}
public ModularCrypt(string modularCryptFormatStr)
{
if (string.IsNullOrWhiteSpace(modularCryptFormatStr))
{
throw new ArgumentException("Cannot be null, empty or whitespace.", "modularCryptFormatStr");
}
// First character is the delim character
char delim = modularCryptFormatStr[0];
if (INVALID_DELIM_ALPHABET.Contains(delim))
{
throw new ArgumentException("Delim character not allowed. '" + delim + "'");
}
// Split into ModularCrypt segments
string[] mcSegments = modularCryptFormatStr.Split(new[] { delim }, StringSplitOptions.None);
if (mcSegments.Length - 1 != 4)
{
throw new ArgumentException("Invalid ModularCryptFormat String: " + modularCryptFormatStr, "modularCryptFormatStr");
}
// WorkFactor part must be a non-negative integer
int workFactor;
if (!int.TryParse(mcSegments[FORMAT_WORKFACTOR_INDEX], out workFactor) ||
workFactor < 0)
{
throw new ArgumentException("WorkFactor segment must be a non-negative integer", "modularCryptFormatStr");
}
// Salt part must be a Base64 string
byte[] salt;
try
{
salt = Convert.FromBase64String(mcSegments[FORMAT_SALT_INDEX]);
}
catch (FormatException)
{
throw new ArgumentException("Invalid Salt segment", "modularCryptFormatStr");
}
// Cipher part must be empty or a Base64 string
byte[] cipher;
try
{
cipher = mcSegments[FORMAT_CIPHER_INDEX] != string.Empty ? Convert.FromBase64String(mcSegments[FORMAT_CIPHER_INDEX]) : new byte[] { };
}
catch (IndexOutOfRangeException)
{
cipher = new byte[] { };
}
catch (ArgumentNullException)
{
throw new ArgumentException("Invalid Cipher component", "modularCryptFormatStr");
}
catch (FormatException)
{
throw new ArgumentException("Invalid Cipher component", "modularCryptFormatStr");
}
_delim = delim;
_identifier = mcSegments[FORMAT_IDENTIFIER_INDEX];
_workFactor = workFactor;
_salt = salt;
_cipher = cipher;
}
