private BackupAttributes ExtractAttributesFromBackup()
{
this._backupFileStream.Position = 0;
var backupAttributes = new BackupAttributes
{
Header = this._backupFileStream.ReadOneLine(), // 1. Line
BackupVersion = this._backupFileStream.ReadOneLine(), // 2. Line
IsCompressed = this._backupFileStream.ReadOneLine() == "1" ? true : false // 3. Line
};
var encryptionType = this._backupFileStream.ReadOneLine(); // 4. Line
backupAttributes.EncryptionType = encryptionType switch
{
"none" => EncryptionType.None,
"AES-256" => EncryptionType.AES256,
_ => EncryptionType.Unknown,
};
if (backupAttributes.EncryptionType == EncryptionType.AES256)
{
backupAttributes.UserPasswordSalt = this._backupFileStream.ReadOneLine(); // 5. Line
backupAttributes.MasterKeySalt = this._backupFileStream.ReadOneLine(); // 6. Line
backupAttributes.Iterations = int.Parse(this._backupFileStream.ReadOneLine()); // 7. Line
backupAttributes.UserIVKey = this._backupFileStream.ReadOneLine(); // 8. Line
backupAttributes.MasterKeyEncrypted = this._backupFileStream.ReadOneLine(); // 9. Line
}
return(backupAttributes);
}
public AndroidBackup(MemoryStream backupFileStream)
{
this._backupFileStream = backupFileStream;
this.Attributes = ExtractAttributesFromBackup();
}