internal static string Create(GetRsaKeyResponse getRsaKeyResponse, string password)
{
var encryptPasswordModel = new EncryptPasswordModel
{
PublicKeyExp = getRsaKeyResponse.PublicKeyExp,
PublicKeyMod = getRsaKeyResponse.PublicKeyMod,
Password = password
};
var encrypted = string.Empty;
while (encrypted.Length < 2 || encrypted.Substring(encrypted.Length - 2) != "==")
{
encrypted = EncryptPassword(encryptPasswordModel);
}
return(encrypted);
}
private static string EncryptPassword(EncryptPasswordModel encryptPasswordModel)
{
// Convert the public keys to BigIntegers
var modulus = CreateBigInteger(encryptPasswordModel.PublicKeyMod);
var exponent = CreateBigInteger(encryptPasswordModel.PublicKeyExp);
// Original: $data = this.pkcs1pad2($data,($pubkey.modulus.bitLength()+7)>>3);
// I'm going to hardcode the bitlength, I can't figure that out right now.
var encryptedNumber = Pkcs1Pad2(encryptPasswordModel.Password, (2048 + 7) >> 3);
// And now, the RSA encryption
encryptedNumber = BigInteger.ModPow(encryptedNumber, exponent, modulus);
// Finally we convert the encrypted string back to Base16
var encryptedString = encryptedNumber.ToString("x");
// And then we decode it back
// And we put it back into Base64
encryptedString = EncodeBase64(DecodeHex(encryptedString));
return(encryptedString);
}
