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(CSAF): support different archive keys.

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This commit is contained in:
morkt 2023-09-07 12:02:19 +04:00
parent 10ba6e6986
commit b6ebb7d451
1 changed files with 29 additions and 2 deletions
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31
ArcFormats/FamilyAdvSystem/ArcCSAF.cs
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@ -2,7 +2,7 @@
//! \date 2019 Jan 01
//! \brief Family Adv System resource archive.
//
// Copyright (C) 2019 by morkt
// Copyright (C) 2019-2023 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
@ -34,6 +34,11 @@ using GameRes.Utility;
namespace GameRes.Formats.FamilyAdvSystem
{
[Serializable]
public class FamilyAdvScheme : ResourceScheme
{
public IDictionary<string, string> KnownKeys;
}
[Export(typeof(ArchiveFormat))]
public class CsafOpener : ArchiveFormat
@ -70,8 +75,9 @@ namespace GameRes.Formats.FamilyAdvSystem
{
if (is_encrypted)
{
var key = QueryEncryptionKey (file);
file.View.Read (0x20, index, 0, index_size);
enc = new CsafEncryption (DefaultKey, DefaultIV);
enc = new CsafEncryption (key, DefaultIV);
using (var decryptor = enc.CreateDecryptor (0))
using (var enc_names = file.CreateStream (0x20 + index_size, names_size))
using (var dec_names = new InputCryptoStream (enc_names, decryptor))
@ -136,6 +142,27 @@ namespace GameRes.Formats.FamilyAdvSystem
var input = new CsafStream (carc);
return new StreamRegion (input, entry.Offset, entry.Size);
}
internal string QueryEncryptionKey (ArcView file)
{
var title = FormatCatalog.Instance.LookupGame (file.Name);
if (string.IsNullOrEmpty (title))
return DefaultKey;
string key;
if (!KnownKeys.TryGetValue (title, out key))
return DefaultKey;
return key;
}
FamilyAdvScheme DefaultScheme = new FamilyAdvScheme { KnownKeys = new Dictionary<string, string>() };
internal IDictionary<string, string> KnownKeys { get { return DefaultScheme.KnownKeys; } }
public override ResourceScheme Scheme
{
get { return DefaultScheme; }
set { DefaultScheme = (FamilyAdvScheme)value; }
}
}
internal class CsafEncryption : IDisposable