public static byte[] RemoveEncryptHeader(byte[] datas)
{
if (datas != null)
{
return(FileHeaderUtil.RemoveEncryptHeader(new MemoryStream(datas)));
}
return(null);
}
public static byte[] EncryptBytes(byte[] data, bool header = true)
{
if (header && FileHeaderUtil.CheckHeaderIsEncrypt(data))
{
return(null);
}
ICryptoTransform cryptoTransform = AESSecurity.aesManaged.CreateEncryptor();
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Write);
cryptoStream.Write(data, 0, data.Length);
cryptoStream.Close();
byte[] array = (!header) ? memoryStream.ToArray() : FileHeaderUtil.AddEncryptHeader(memoryStream);
memoryStream.Dispose();
return(array);
}
public static byte[] DecryptBytes(byte[] encryptBytes, bool header = true)
{
if (header && !FileHeaderUtil.CheckHeaderIsEncrypt(encryptBytes))
{
return(null);
}
ICryptoTransform cryptoTransform = AESSecurity.aesManaged.CreateDecryptor();
byte[] result = null;
using (MemoryStream memoryStream = new MemoryStream(encryptBytes))
{
if (header)
{
BinaryReader binaryReader = FileHeaderUtil.RemoveEncryptHeaderStream <MemoryStream>(memoryStream);
}
result = cryptoTransform.TransformFinalBlock(encryptBytes, Convert.ToInt32(memoryStream.Position), encryptBytes.Length - Convert.ToInt32(memoryStream.Position));
}
return(result);
}
public static byte[] DecryptFile(string path)
{
byte[] result = null;
using (FileStream fileStream = new FileStream(path, FileMode.Open))
{
BinaryReader binaryReader = FileHeaderUtil.RemoveEncryptHeaderStream <FileStream>(fileStream);
ICryptoTransform cryptoTransform = AESSecurity.aesManaged.CreateDecryptor();
using (CryptoStream cryptoStream = new CryptoStream(fileStream, cryptoTransform, 0))
{
byte[] array = new byte[1048576];
using (MemoryStream memoryStream = new MemoryStream(Convert.ToInt32(fileStream.Length) + AESSecurity.aesManaged.BlockSize))
{
int num;
while ((num = cryptoStream.Read(array, 0, array.Length)) > 0)
{
memoryStream.Write(array, 0, num);
}
result = memoryStream.ToArray();
}
}
binaryReader.Close();
}
return(result);
}
public static bool CheckHeaderIsEncrypt(byte[] datas)
{
return(datas != null && FileHeaderUtil.CheckHeaderIsEncrypt(new MemoryStream(datas)));
}