static public Stream DecryptFile(String filePath, String password)
{
byte[] bytesToBeDecrypted = File.ReadAllBytes(filePath);
byte[] passwordBytes = Encoding.UTF8.GetBytes(password);
byte[] bytesDecrypted;
passwordBytes = SHA256.Create().ComputeHash(passwordBytes);
bytesDecrypted = AES256.AES_Decrypt(bytesToBeDecrypted, passwordBytes);
return(new MemoryStream(bytesDecrypted));
}
/*
** Encrypt and decrypt file
*/
static public void EncryptFile(String filePath, String password)
{
byte[] bytesToBeEncrypted = File.ReadAllBytes(filePath);
byte[] passwordBytes = Encoding.UTF8.GetBytes(password);
byte[] bytesEncrypted;
passwordBytes = SHA256.Create().ComputeHash(passwordBytes);
bytesEncrypted = AES256.AES_Encrypt(bytesToBeEncrypted, passwordBytes);
if (File.Exists(filePath))
{
File.Delete(filePath);
File.WriteAllBytes(filePath, bytesEncrypted);
}
}
// Url : Send the entity URL
public static Stream GetDocumentStream(Boolean isPrivate, String Url, String encryptionKey)
{
Stream result;
String fullUrl;
fullUrl = GetFullDocumentUrl(Url);
if (isPrivate)
{
result = AES256.DecryptFile(fullUrl, encryptionKey);
}
else
{
result = File.OpenRead(fullUrl);
}
result.Position = 0;
return(result);
}