public static void DecryptField <T>(this JObject jsonJObject, ICryptoManager cryptoManager, string path)
{
var jToken = jsonJObject.SelectToken(cryptoManager.Mangle(path));
var kid = jToken.SelectToken(EncryptionField.KeyIdentifier).Value <string>();
var cipherText = jToken.SelectToken(EncryptionField.CipherText).Value <string>();
var alg = jToken.SelectToken(EncryptionField.Algorithm).Value <string>();
var decryptedBytes = cryptoManager.Decrypt(new EncryptionResult
{
Alg = alg,
Kid = kid,
Ciphertext = cipherText
});
var rawText = Encoding.UTF8.GetString(decryptedBytes);
jsonJObject.Property(cryptoManager.Mangle(path)).Remove();
var typeCode = Type.GetTypeCode(typeof(T));
if (typeCode == TypeCode.String)
{
jsonJObject.Add(new JProperty(path, rawText));
}
else
{
var value = JsonConvert.DeserializeObject(rawText);
jsonJObject.Add(new JProperty(path, value));
}
}
protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
{
var result = base.CreateProperty(member, memberSerialization);
if (member.TryGetEncryptedFieldAttribute(out var attribute))
{
if (attribute.KeyName == null)
{
throw new CryptoKeyNullException();
}
var propertyInfo = member as PropertyInfo;
if (_legacyFieldPrefix == null)
{
result.PropertyName = _cryptoManager.Mangle(result.PropertyName);
}
else
{
result.PropertyName = _legacyFieldPrefix + result.PropertyName;
}
result.Converter = new EncryptedFieldConverter(propertyInfo, _cryptoManager, attribute.LegacySigningKeyName);
}
return(result);
}
public static void EncryptField(this JObject jsonJObject, ICryptoManager cryptoManager, string path)
{
var jToken = jsonJObject.SelectToken(path);
var rawBytes = Encoding.UTF8.GetBytes(jToken.ToString());
var encrypted = cryptoManager.Encrypt(rawBytes);
jsonJObject.Property(path).Remove();
jsonJObject.Add(new JProperty(cryptoManager.Mangle(path), encrypted.ToJObject()));
}
