public static byte[] Open(byte[] cipherText, byte[] nonce, byte[] secretKey, byte[] publicKey)
{
if (secretKey == null || secretKey.Length != 32)
{
throw new KeyOutOfRangeException("secretKey", (secretKey == null) ? 0 : secretKey.Length, string.Format("key must be {0} bytes in length.", 32));
}
if (publicKey == null || publicKey.Length != 32)
{
throw new KeyOutOfRangeException("publicKey", (publicKey == null) ? 0 : secretKey.Length, string.Format("key must be {0} bytes in length.", 32));
}
if (nonce == null || nonce.Length != 24)
{
throw new NonceOutOfRangeException("nonce", (nonce == null) ? 0 : nonce.Length, string.Format("nonce must be {0} bytes in length.", 24));
}
if (cipherText[0] == 0)
{
bool flag = true;
for (int i = 0; i < 15; i++)
{
if (cipherText[i] != 0)
{
flag = false;
break;
}
}
if (flag)
{
byte[] array = new byte[cipherText.Length - 16];
Array.Copy(cipherText, 16, array, 0, cipherText.Length - 16);
cipherText = array;
}
}
byte[] array2 = new byte[cipherText.Length - 16];
if (SodiumLibrary.crypto_box_open_easy(array2, cipherText, (long)cipherText.Length, nonce, publicKey, secretKey) != 0)
{
throw new CryptographicException("Failed to open PublicKeyBox");
}
return(array2);
}