public static String decrypt(String chiperText, string ecbKey)
{
ASCIIEncoding encoder = new ASCIIEncoding();
DES des = new DES();
byte[] kbytes = UtilityConverter.GetBytes(ecbKey);
BitArray bitKey = new BitArray(kbytes);
BitArray bits = UtilityConverter.FromHex(chiperText);
BitArray[] group = new BitArray[(int)(bits.Length / 64)];
StringBuilder builder = new StringBuilder();
for (int i = 0; i < group.Length; i++)
{
group[i] = new BitArray(64);
for (int j = 0; j < 64; j++)
{
group[i][j] = bits[i * 64 + j];
}
BitArray dec = des.decrypt(group[i], bitKey);
builder.Append(UtilityConverter.ToString(dec));
}
return(builder.ToString().Replace("\0", ""));
}
public static String encrypt(String plainText, string ecbKey)
{
if (plainText == null)
{
return("");
}
ASCIIEncoding encoder = new ASCIIEncoding();
DES des = new DES();
byte[] kbytes = UtilityConverter.GetBytes(ecbKey);
BitArray bitKey = new BitArray(kbytes);
byte[] tempB = encoder.GetBytes(plainText);
byte[] bytes = new byte[(int)Math.Ceiling(tempB.Length / 8.0f) * 8];
for (int i = 0; i < tempB.Length; i++)
{
bytes[i] = tempB[i];
}
BitArray[] group = new BitArray[(int)Math.Ceiling(bytes.Length / 8.0)];
StringBuilder builder = new StringBuilder();
for (int i = 0; i < group.Length; i++)
{
byte[] b = new byte[8];
for (int j = 0; j < 8; j++)
{
b[j] = bytes[i * 8 + j];
}
group[i] = new BitArray(b);
BitArray enc = des.encrypt(group[i], bitKey);
//UtilityConverter.ShowBitsLine(enc);
builder.Append(UtilityConverter.ToHex(enc));
}
return(builder.ToString());
}