public void TestHexEncodeDecode()
{
String data = "*****@*****.**";
String encodeData = CryptUtil.Encode(Encoding.UTF8.GetBytes(data), MasterCard.Core.Security.Fle.DataEncoding.HEX);
byte[] decodeDataBytes = CryptUtil.Decode(encodeData, MasterCard.Core.Security.Fle.DataEncoding.HEX);
String dataOut = System.Text.Encoding.UTF8.GetString(decodeDataBytes);
Assert.AreEqual(data, dataOut);
}
public IDictionary <String, Object> Decrypt(IDictionary <String, Object> map)
{
SmartMap smartMap = new SmartMap(map);
foreach (String fieldToDecrypt in configuration.FieldsToDecrypt)
{
if (smartMap.ContainsKey(fieldToDecrypt))
{
String baseKey = "";
if (fieldToDecrypt.IndexOf(".") > 0)
{
baseKey = fieldToDecrypt.Substring(0, fieldToDecrypt.LastIndexOf("."));
baseKey += ".";
}
//need to read the key
String encryptedKey = (String)smartMap.Get(baseKey + configuration.EncryptedKeyFiledName);
smartMap.Remove(baseKey + configuration.EncryptedKeyFiledName);
byte[] encryptedKeyByteArray = CryptUtil.Decode(encryptedKey, configuration.DataEncoding);
//need to decryt with RSA
byte[] secretKeyBytes = null;
if (smartMap.ContainsKey(baseKey + configuration.OaepHashingAlgorithmFieldName))
{
string oaepHashingAlgorithm = (String)smartMap.Get(baseKey + configuration.OaepHashingAlgorithmFieldName);
oaepHashingAlgorithm = oaepHashingAlgorithm.Replace("SHA", "SHA-");
RSAEncryptionPadding customEncryptionPadding = configuration.OaepEncryptionPadding;
if (oaepHashingAlgorithm.Equals("SHA-256"))
{
customEncryptionPadding = RSAEncryptionPadding.OaepSHA256;
}
else if (oaepHashingAlgorithm.Equals("SHA-512"))
{
customEncryptionPadding = RSAEncryptionPadding.OaepSHA512;
}
secretKeyBytes = CryptUtil.DecryptRSA(encryptedKeyByteArray, this.privateKey, customEncryptionPadding);
}
else
{
secretKeyBytes = CryptUtil.DecryptRSA(encryptedKeyByteArray, this.privateKey, configuration.OaepEncryptionPadding);
}
//need to read the iv
String ivString = (String)smartMap.Get(baseKey + configuration.IvFieldName);
smartMap.Remove(baseKey + configuration.IvFieldName);
byte[] ivByteArray = CryptUtil.Decode(ivString.ToString(), configuration.DataEncoding);
// remove the field that are not required in the map
if (smartMap.ContainsKey(configuration.PublicKeyFingerprintFiledName))
{
smartMap.Remove(configuration.PublicKeyFingerprintFiledName);
}
//need to decrypt the data
String encryptedData = (String)smartMap.Get(baseKey + configuration.EncryptedDataFieldName);
smartMap.Remove(baseKey + configuration.EncryptedDataFieldName);
byte[] encryptedDataByteArray = CryptUtil.Decode(encryptedData, configuration.DataEncoding);
byte[] decryptedDataByteArray = CryptUtil.DecryptAES(ivByteArray, secretKeyBytes, encryptedDataByteArray, configuration.SymmetricKeysize, configuration.SymmetricMode, configuration.SymmetricPadding);
String decryptedDataString = System.Text.Encoding.UTF8.GetString(decryptedDataByteArray);
if (decryptedDataString.StartsWith("{"))
{
Dictionary <String, Object> decryptedDataMap = JsonConvert.DeserializeObject <Dictionary <String, Object> >(decryptedDataString);
foreach (KeyValuePair <String, Object> entry in decryptedDataMap)
{
smartMap.Add(baseKey + configuration.EncryptedDataFieldName + "." + entry.Key, entry.Value);
}
}
else
{
smartMap.Add(baseKey + configuration.EncryptedDataFieldName, decryptedDataString);
}
break;
}
}
return(smartMap);
}