Skip to content

修正 ImagePNXのシグネチャ（0x2F2638E1 ⇒ 0） #204

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
kyororay wants to merge 2 commits into from
Closed

修正 ImagePNXのシグネチャ（0x2F2638E1 ⇒ 0） #204

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
2d10abf
シグネチャを修正（0x2F2638E1 ⇒ 0）
kyororay Jul 8, 2026
712da15
吉里吉里 復号アルゴリズムの追加（クラス名：HoneyCombCrypt）
kyororay Jul 9, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion ArcFormats/ImagePNX.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ public class PnxFormat : PngFormat
{
public override string Tag { get { return "PNX"; } }
public override string Description { get { return "Encrypted PNG image"; } }
public override uint Signature { get { return 0x2F2638E1; } }
public override uint Signature { get { return 0; } }
public override bool CanWrite { get { return false; } }

public override ImageMetaData ReadMetaData (IBinaryStream file)
Expand Down
18 changes: 18 additions & 0 deletions ArcFormats/KiriKiri/CryptAlgorithms.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1671,4 +1671,22 @@ private byte[] InitKey(uint hash)
}
}

[Serializable]
public class HoneyCombCrypt : ICrypt
{
public override void Decrypt(Xp3Entry entry, long offset, byte[] buffer, int pos, int count)
{
uint seed = entry.Hash ^ 0xABCD9876;
byte key = (byte)((seed >> 24) ^ (seed >> 16) ^ (seed >> 8) ^ seed);
if (key == 0)
key = 0xA5;
for (int i = 0; i < count; ++i)
buffer[pos + i] ^= key;
}

public override void Encrypt(Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
Decrypt(entry, offset, values, pos, count);
}
}
}
Loading