protected override void ValidatePassword(byte[] passwordHash)
{
if (passwordHash.BinaryCompareTo(_password) != 0)
{
throw LiteException.DatabaseWrongPassword();
}
}
public FileReaderV7(Stream stream, string password)
{
_stream = stream;
// only userVersion was available in old file format versions
_header = this.ReadPage(0);
this.UserVersion = _header["userVersion"].AsInt32;
if (password == null && _header["salt"].AsBinary.IsFullZero() == false)
{
throw new LiteException(0, "Current data file requires password");
}
else if (password != null)
{
if (_header["salt"].AsBinary.IsFullZero())
{
throw new LiteException(0, "Current data file has no encryption - do not use password");
}
var hash = AesEncryption.HashSHA1(password);
if (hash.SequenceEqual(_header["password"].AsBinary) == false)
{
throw LiteException.DatabaseWrongPassword();
}
}
_aes = password == null ? null : new AesEncryption(password, _header["salt"].AsBinary);
}
/// <summary>
/// To be override in Encripted disk
/// </summary>
protected virtual void ValidatePassword(byte[] passwordHash)
{
if (passwordHash.Any(b => b > 0))
{
throw LiteException.DatabaseWrongPassword();
}
}
/// <summary>
/// Read page bytes from disk
/// </summary>
public virtual byte[] ReadPage(uint pageID)
{
var buffer = new byte[BasePage.PAGE_SIZE];
var position = BasePage.GetSizeOfPages(pageID);
// position cursor
if (_stream.Position != position)
{
_stream.Seek(position, SeekOrigin.Begin);
}
// read bytes from data file
_stream.Read(buffer, 0, BasePage.PAGE_SIZE);
// when reading the header, check the password
if (pageID == 0 && _crypto != null)
{
// I know, header page will be double read (it's the price for isolated concerns)
var header = (HeaderPage)BasePage.ReadPage(buffer);
if (BinaryExtensions.BinaryCompareTo(_password, header.Password) != 0)
{
throw LiteException.DatabaseWrongPassword();
}
}
else if (_crypto != null)
{
buffer = _crypto.Decrypt(buffer);
}
return(buffer);
}
/// <summary>
/// Override read page decrypting data from disk
/// </summary>
public override byte[] ReadPage(uint pageID)
{
var buffer = base.ReadPage(pageID);
// when read header, checks passoword
if (pageID == 0)
{
// I know, header page will be double read (it's the price for isolated concerns)
var header = (HeaderPage)BasePage.ReadPage(buffer);
if (header.DbParams.Password.BinaryCompareTo(_password) != 0)
{
throw LiteException.DatabaseWrongPassword();
}
return(buffer);
}
return(_crypto.Decrypt(buffer));
}