public string UnwrapAndDecrypt(WrappedValue wrap)
{
var key = AsymEncryption.Decryptor(PrivateKey).Decrypt(wrap.EncryptedAESKey);
var value = SymEncryption.GetWith(key, wrap.IV).Decrypt(wrap.EncryptedValue);
return(Encoding.UTF8.GetString(value));
}
public WrappedValue EncryptAndWrap(string value)
{
var valueAsBytes = Encoding.UTF8.GetBytes(value);
// generate AES key and iv
byte[] key = new byte[SymetricKeySize], iv = new byte[16];
secureRandom.NextBytes(key);
secureRandom.NextBytes(iv);
// encrypt all the things
var encryptedKey = AsymEncryption.Encryptor(PublicKey).Encrypt(key);
var encryptedValue = SymEncryption.GetWith(key, iv).Encrypt(valueAsBytes);
return(new WrappedValue
{
EncryptedAESKey = encryptedKey,
IV = iv,
EncryptedValue = encryptedValue
});
}