public static byte[] BlockCipher(byte[] bytes, IBufferedCipher cipher, bool isEncrypt)
{
if ((bytes.Length <= 62 && isEncrypt) || (bytes.Length <= 128 && !isEncrypt))
{
return(cipher.DoFinal(bytes));
}
byte[] suffix = new byte[0];
byte[] prefix = new byte[0];
int num = (!isEncrypt) ? 128 : 62;
byte[] array = new byte[num];
for (int i = 0; i < bytes.Length; i++)
{
if (i > 0 && i % num == 0)
{
suffix = cipher.DoFinal(array);
prefix = SwrveManagerUtils.AppendBytes(prefix, suffix);
int num2 = num;
if (i + num > bytes.Length)
{
num2 = bytes.Length - i;
}
array = new byte[num2];
}
array[i % num] = bytes[i];
}
suffix = cipher.DoFinal(array);
return(SwrveManagerUtils.AppendBytes(prefix, suffix));
}
public static string RSAEncrypt(string pemStreamText, KeyParameter secretKeyParameter)
{
string result = string.Empty;
try
{
StreamReader reader = new StreamReader(new MemoryStream(Convert.FromBase64String(pemStreamText)));
Org.BouncyCastle.OpenSsl.PemReader pemReader = new Org.BouncyCastle.OpenSsl.PemReader(reader);
PemObject pemObject = pemReader.ReadPemObject();
RsaKeyParameters parameters;
if (pemObject != null)
{
AsymmetricKeyParameter asymmetricKeyParameter = PublicKeyFactory.CreateKey(pemObject.Content);
parameters = (RsaKeyParameters)asymmetricKeyParameter;
}
else
{
parameters = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(pemStreamText));
}
byte[] key = secretKeyParameter.GetKey();
IBufferedCipher cipher = CipherUtilities.GetCipher("RSA/ECB/OAEPWithSHA_1AndMGF1Padding");
cipher.Init(true, parameters);
byte[] inArray = SwrveManagerUtils.BlockCipher(key, cipher, true);
result = Convert.ToBase64String(inArray, Base64FormattingOptions.None);
}
catch (Exception ex)
{
Debug.LogError("### SwrveManagerUtils::RSAEncrypt: " + ex.Message);
}
return(result);
}
public static string AESEncrypt(string saltString, string plainText)
{
if (SwrveManagerUtils.secretKeyParameter == null)
{
SwrveManagerUtils.secretKeyParameter = SwrveManagerUtils.KeyGen(saltString);
}
string text = string.Empty;
IBufferedCipher cipher = CipherUtilities.GetCipher(SwrveManagerUtils.ENCRYPTION_ALGORITHM + "/CBC/PKCS5PADDING");
byte[] array = new byte[cipher.GetBlockSize()];
SecureRandom instance = SecureRandom.GetInstance("SHA1PRNG");
instance.NextBytes(array);
ParametersWithIV parametersWithIV = new ParametersWithIV(SwrveManagerUtils.secretKeyParameter, array);
cipher.Init(true, parametersWithIV);
int num = array.Length;
byte[] array2 = cipher.DoFinal(Encoding.UTF8.GetBytes(plainText));
Debug.Log("AESEncrypt:: IV as string: " + Convert.ToBase64String(parametersWithIV.GetIV()));
Debug.Log("AESEncrypt:: encryptedByte as string: " + Convert.ToBase64String(array2));
byte[] array3 = new byte[num + array2.Length];
Array.Copy(parametersWithIV.GetIV(), 0, array3, 0, num);
Array.Copy(array2, 0, array3, num, array2.Length);
text = Convert.ToBase64String(array3, Base64FormattingOptions.None);
Debug.Log("AESEncrypt:: encryptedString: " + text);
return(text);
}
public static string GetRSAEncryptedKey()
{
string result = string.Empty;
if (SwrveManagerUtils.secretKeyParameter == null)
{
Debug.LogError("### SwrveManagerUtils::GetRSAEncryptedKey: secretKeyParameter is null! There is nothing to encrypt");
return(result);
}
try
{
string text = (Resources.Load("pub") as TextAsset).text;
text = text.Replace("-----BEGIN PUBLIC KEY-----", string.Empty).Replace("-----END PUBLIC KEY-----", string.Empty);
result = SwrveManagerUtils.RSAEncrypt(text, SwrveManagerUtils.secretKeyParameter);
}
catch (Exception ex)
{
Debug.LogError("### SwrveManagerUtils::GetRSAEncryptedKey: " + ex.Message);
}
return(result);
}