private string DoPascalCoinEciesEncrypt(KeyType keyType,
string rawAffineXCoord, string rawAffineYCoord, string payloadToEncrypt)
{
// Encryption
IesCipher cipherEncrypt = new IesCipher(GetEciesPascalCoinCompatibilityEngine());
cipherEncrypt.Init(true, RecreatePublicKeyFromAffineXandAffineYCoord(keyType,
Hex.Decode(rawAffineXCoord), Hex.Decode(rawAffineYCoord)),
GetPascalCoinIesParameterSpec(), SecureRandom);
return(Hex.ToHexString(cipherEncrypt.DoFinal(Encoding.ASCII.GetBytes
(payloadToEncrypt))));
}
private string DoPascalCoinEciesDecrypt(KeyType keyType,
string rawPrivateKey, string payloadToDecrypt)
{
string result;
try
{
// Decryption
IesCipher cipherDecrypt = new IesCipher(GetEciesPascalCoinCompatibilityEngine());
cipherDecrypt.Init(false, RecreatePrivateKeyFromByteArray(keyType,
Hex.Decode(rawPrivateKey)),
GetPascalCoinIesParameterSpec(), SecureRandom);
result = Encoding.ASCII.GetString(cipherDecrypt.DoFinal(Hex.Decode
(payloadToDecrypt)));
}
catch (Exception e)
{
// should only happen if decryption fails
throw new Exception("Decryption failed", e);
}
return(result);
}
