public void TestEntryDecrypt()
{
var e = SaveReader.GetSaveFileEntry((byte[])Entry000_0.Clone(), 0, 0);
e.Magic.Should().Be(0x9B7A0B7C);
e.AdlerChecksum.Should().Be(Adler32.ComputeChecksum(e.Data));
e.Crc32Checksum.Should().Be(Crc32.ComputeChecksum(e.Data));
e.DataSize.Should().Be(e.Data.Length);
e.DataSizeDuplicate.Should().Be(e.Data.Length);
}
public void TestDecryptFull()
{
const string dir = @"E:\snap\save\";
for (var index = 0; index < 16; ++index)
{
var name = SaveReader.SaveFileNames[index];
var file = Path.Combine(dir, name);
if (!File.Exists(file))
{
continue;
}
var encsave = File.ReadAllBytes(file);
var h = SaveReader.GetSaveFileHeader(new ReadOnlySpan <byte>(encsave, 0, 0x30), index);
var decsave = new byte[0x20 + (h.EntryCount * h.DecryptedEntrySize)];
var encHeader = encsave.AsSpan(..0x30);
SaveReader.DecryptHeader(encHeader, SaveReader.SaveFileKeys[index], SaveReader.HeaderKey).CopyTo(decsave, 0);
for (var i = 0; i < h.EntryCount; ++i)
{
var start = 0x30 + (i * h.EncryptedEntrySize);
if (BitConverter.ToUInt64(encsave, start) == 0)
{
continue;
}
var encEntry = encsave.AsSpan(start, h.EncryptedEntrySize);
var e = SaveReader.GetSaveFileEntry(encEntry, index, i);
var region = e.Data.AsSpan(..h.DecryptedEntrySize);
e.AdlerChecksum.Should().Be(Adler32.ComputeChecksum(region));
e.Crc32Checksum.Should().Be(Crc32.ComputeChecksum(region));
e.Magic.Should().Be(0x9B7A0B7C);
e.DataSize.Should().BeLessOrEqualTo(e.Data.Length);
e.DataSizeDuplicate.Should().BeLessOrEqualTo(e.Data.Length);
e.Data.Length.Should().Be((h.DecryptedEntrySize + 15) & ~15);
var decDest = decsave.AsSpan(0x20 + (i * h.DecryptedEntrySize));
region.CopyTo(decDest);
}
var dest = Path.Combine(dir, $"{name}.dec");
File.WriteAllBytes(dest, decsave);
}
}
