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(QLIE): better handling of version 1 archives.

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This commit is contained in:
morkt
2018-06-19 13:05:31 +04:00
parent 48451ea482
commit 28aed8df37
2 changed files with 59 additions and 5 deletions
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53
ArcFormats/Qlie/Encryption.cs
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@@ -56,7 +56,9 @@ namespace GameRes.Formats.Qlie
public static IEncryption Create (ArcView file, Version version, byte[] arc_key)
{
if (2 == version.Major || 1 == version.Major)
if (1 == version.Major)
return new EncryptionV1();
else if (2 == version.Major)
return new EncryptionV2();
else if (3 == version.Major && 1 == version.Minor)
return new EncryptionV3_1 (file);
@@ -73,6 +75,55 @@ namespace GameRes.Formats.Qlie
public abstract void DecryptEntry (byte[] data, int offset, int length, QlieEntry entry);
}
internal class EncryptionV1 : QlieEncryption
{
public EncryptionV1 ()
{
NameKey = 0xC4;
ArcKey = 0;
}
public override uint CalculateHash (byte[] data, int length)
{
return 0; // not implemented
}
public override string DecryptName (byte[] name, int name_length)
{
int key = NameKey ^ 0x3E;
for (int k = 0; k < name_length; ++k)
name[k] ^= (byte)(((k + 1) ^ key) + k + 1);
return Encodings.cp932.GetString (name, 0, name_length);
}
public override void DecryptEntry (byte[] data, int offset, int length, QlieEntry entry)
{
if (offset < 0)
throw new ArgumentOutOfRangeException ("offset");
if (length > data.Length || offset > data.Length - length)
throw new ArgumentOutOfRangeException ("length");
uint arc_key = ArcKey;
ulong hash = 0xA73C5F9DA73C5F9Dul;
ulong xor = arc_key ^ 0xFEC9753Eu;
xor |= xor << 32;
unsafe
{
fixed (byte* raw = data)
{
ulong* encoded = (ulong*)(raw + offset);
for (int i = 0; i < length / 8; ++i)
{
hash = MMX.PAddD (hash, 0xCE24F523CE24F523ul) ^ xor;
xor = *encoded ^ hash;
*encoded++ = xor;
}
}
}
}
}
internal class EncryptionV2 : QlieEncryption
{
public EncryptionV2 ()