public string Decrypt(string keyMaterial, Encrypted encrypted)
{
CryptographicKey key = SymmetricKeyFromMaterial(keyMaterial);
IBuffer encryptedBuffer = CryptographicBuffer.DecodeFromBase64String(encrypted.Value);
IBuffer decryptedBuffer = CryptographicEngine.Decrypt(key, encryptedBuffer, null);
return CryptographicBuffer.ConvertBinaryToString(encrypted.Encoding, decryptedBuffer);
}
/// <summary>
/// Encrypts the text using the keyMaterial. This encryption only works with
/// PKCS7 algorithms which handle the padding and also non CBC algorithms so
/// that it doesn't have to deal with creating an initialization vector
/// </summary>
public Encrypted Encrypt(string keyMaterial, string text)
{
CryptographicKey key = SymmetricKeyFromMaterial(keyMaterial);
// Create a buffer that contains the encoded message to be encrypted.
IBuffer buffMsg = CryptographicBuffer.ConvertStringToBinary(text, BinaryStringEncoding.Utf8);
IBuffer encryptedBuffer = CryptographicEngine.Encrypt(key, buffMsg, null);
string encryptedValue = CryptographicBuffer.EncodeToBase64String(encryptedBuffer);
var encrypted = new Encrypted(EncryptAlgorithm, BinaryStringEncoding.Utf8, encryptedValue);
return encrypted;
}