private async Task <byte[]> InternalDecryptCbcAsync(byte[] input, byte[] key)
{
var iv = new byte[IvSize];
var encryptedContent = new byte[input.Length - IvSize];
Buffer.BlockCopy(input, 0, iv, 0, iv.Length);
Buffer.BlockCopy(input, iv.Length, encryptedContent, 0, encryptedContent.Length);
using (var ms = new MemoryStream())
{
using (var blowfish = new BlowfishCbc(key, iv, false))
{
using (var cs = new CryptoStream(ms, blowfish, CryptoStreamMode.Write))
{
await cs.WriteAsync(encryptedContent, 0, encryptedContent.Length);
}
}
return(ms.ToArray());
}
}
private async Task <byte[]> InternalEncryptCbcAsync(byte[] input, byte[] key)
{
byte[] iv = null;
byte[] encryptedContent = null;
using (var ms = new MemoryStream())
{
iv = GetIv();
using (var blowfish = new BlowfishCbc(key, iv, true))
{
using (var cs = new CryptoStream(ms, blowfish, CryptoStreamMode.Write))
{
await cs.WriteAsync(input, 0, input.Length);
}
}
encryptedContent = ms.ToArray();
}
//Create new byte array that should contain both unencrypted iv and encrypted data
var result = iv.Combine(encryptedContent);
return(result);
}