public static string Encrypt(string cryptoMethod, string txt)
{
string retVal = String.Empty;
try
{
CryptoType ct;
Enum.TryParse(cryptoMethod, true, out ct);
CryptoCollection cc = CryptoCollection.GetCryptoCollectionInfoByMethod(cryptoMethod);
string key = genRandomText(cc.Key);
string iv = genRandomText(cc.IV);
string e = Encrypt(ct, txt, key, iv);
int i = (int)e.FirstOrDefault();
key = String.Join(String.Empty, key.Reverse().ToArray());
iv = String.Join(String.Empty, iv.Reverse().ToArray());
if (i < e.Length)
{
e = e.Substring(0, i) + key + iv + e.Substring(i);
}
else
{
e += key + iv;
}
retVal = "[" + cc.ID + "]" + e;
}
catch
{
}
return(retVal);
}
public static string Encrypts(string cryptoMethod, string txt)
{
string retVal = String.Empty;
try
{
CryptoType ct;
Enum.TryParse(cryptoMethod, out ct);
CryptoCollection cc = CryptoCollection.GetCryptoCollectionInfoByMethod(cryptoMethod);
//retVal = Encrypt(cryptoMethod, txt, cc);
}
catch
{
}
return(retVal);
}
public static string Decrypt(string txt)
{
string retVal = String.Empty;
try
{
CryptoCollection cc = CryptoCollection.GetCryptoCollectionInfoByID(txt.Substring(1, 3));
CryptoType ct;
Enum.TryParse(cc.Method, out ct);
int i = (int)Convert.ToChar(txt.Substring(5, 1));
string d = String.Empty;
string key = String.Empty;
string iv = String.Empty;
if (i < (txt.Length - cc.Key - cc.IV))
{
d = txt.Substring(5, i) + txt.Substring(5 + i + cc.Key + cc.IV);
key = txt.Substring(5 + i, cc.Key);
iv = txt.Substring(5 + i + cc.Key, cc.IV);
}
else
{
d = txt.Substring(5, txt.Length - cc.Key - cc.IV - 5);
key = txt.Substring(txt.Length - cc.Key - cc.IV, cc.Key);
iv = txt.Substring(txt.Length - cc.IV);
}
key = String.Join(String.Empty, key.Reverse().ToArray());
iv = String.Join(String.Empty, iv.Reverse().ToArray());
retVal = Decrypt(ct, d, key, iv);
}
catch
{
}
return(retVal);
}
