private static JToken EncryptPayloadPath(JToken json, string jsonPathIn, string jsonPathOut, JweConfig config)
{
JToken token = json.SelectToken(jsonPathIn);
if (JsonUtils.IsNullOrEmptyJson(token))
{
// Nothing to encrypt
return(json);
}
// Encode and encrypt
string inJsonString = JsonUtils.SanitizeJson(token.ToString(Formatting.None));
JweHeader header = new JweHeader(ALGORITHM, ENCRYPTION, config.EncryptionKeyFingerprint, CONTENT_TYPE);
string encrypted = JweObject.Encrypt(config, inJsonString, header);
// Delete data in the clear
if ("$".Equals(jsonPathIn))
{
// Create a new object
json = JObject.Parse("{}");
}
else
{
token.Parent.Remove();
}
JsonUtils.CheckOrCreateOutObject(json, jsonPathOut);
var outJsonToken = json.SelectToken(jsonPathOut) as JObject;
JsonUtils.AddOrReplaceJsonKey(outJsonToken, config.EncryptedValueFieldName, encrypted);
return(outJsonToken);
}
public static JweObject Parse(String encryptedPayload)
{
string[] fields = encryptedPayload.Trim().Split('.');
JweObject jweObject = new JweObject();
jweObject.RawHeader = fields[0];
jweObject.Header = JweHeader.Parse(jweObject.RawHeader);
jweObject.EncryptedKey = fields[1];
jweObject.Iv = fields[2];
jweObject.CipherText = fields[3];
jweObject.AuthTag = fields[4];
return(jweObject);
}
private static JToken DecryptPayloadPath(JToken payload, string jsonPathIn, string jsonPathOut, JweConfig config)
{
JToken token = payload.SelectToken(jsonPathIn);
if (JsonUtils.IsNullOrEmptyJson(token))
{
// Nothing to decrypt
return(payload);
}
// Read and remove encrypted data and encryption fields at the given JSON path
string encryptedValue = ReadAndDeleteJsonKey(payload, token, config.EncryptedValueFieldName);
if (string.IsNullOrEmpty(encryptedValue))
{
// Nothing to decrypt
return(payload);
}
JweObject jweObject = JweObject.Parse(encryptedValue);
string decryptedValue = jweObject.Decrypt(config);
if ("$".Equals(jsonPathOut))
{
return(JObject.Parse(decryptedValue));
}
JsonUtils.CheckOrCreateOutObject(payload, jsonPathOut);
JsonUtils.AddDecryptedDataToPayload(payload, decryptedValue, jsonPathOut);
// Remove the input
token = payload.SelectToken(jsonPathIn);
if (null != token && token.Parent != null)
{
token.Parent.Remove();
}
return(payload);
}
