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(QLIE): fixed older archives decryption.

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This commit is contained in:
morkt 2017-03-13 09:02:19 +04:00
parent e15754bf43
commit 29a9c6d5e4
1 changed files with 12 additions and 4 deletions
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16
ArcFormats/Qlie/Encryption.cs
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@ -48,6 +48,11 @@ namespace GameRes.Formats.Qlie
/// </summary> /// </summary>
public uint ArcKey { get; protected set; } public uint ArcKey { get; protected set; }
/// <summary>
/// Key used to decrypt names, usually same as ArcKey.
/// </summary>
public int NameKey { get; protected set; }
public static IEncryption Create (ArcView file, Version version, byte[] arc_key) public static IEncryption Create (ArcView file, Version version, byte[] arc_key)
{ {
if (2 == version.Major || 1 == version.Major) if (2 == version.Major || 1 == version.Major)
@ -71,7 +76,8 @@ namespace GameRes.Formats.Qlie
{ {
public EncryptionV2 () public EncryptionV2 ()
{ {
ArcKey = 0xC4; NameKey = 0xC4;
ArcKey = 0;
} }
public override uint CalculateHash (byte[] data, int length) public override uint CalculateHash (byte[] data, int length)
@ -81,7 +87,7 @@ namespace GameRes.Formats.Qlie
public override string DecryptName (byte[] name, int name_length) public override string DecryptName (byte[] name, int name_length)
{ {
int key = name_length + ((int)ArcKey ^ 0x3E); int key = name_length + (NameKey ^ 0x3E);
for (int k = 0; k < name_length; ++k) for (int k = 0; k < name_length; ++k)
name[k] ^= (byte)(((k + 1) ^ key) + k + 1); name[k] ^= (byte)(((k + 1) ^ key) + k + 1);
@ -94,7 +100,7 @@ namespace GameRes.Formats.Qlie
throw new ArgumentOutOfRangeException ("offset"); throw new ArgumentOutOfRangeException ("offset");
if (length > data.Length || offset > data.Length - length) if (length > data.Length || offset > data.Length - length)
throw new ArgumentOutOfRangeException ("length"); throw new ArgumentOutOfRangeException ("length");
uint arc_key = 0; // ArcKey? uint arc_key = ArcKey;
ulong hash = 0xA73C5F9DA73C5F9Dul; ulong hash = 0xA73C5F9DA73C5F9Dul;
ulong xor = ((uint)length + arc_key) ^ 0xFEC9753Eu; ulong xor = ((uint)length + arc_key) ^ 0xFEC9753Eu;
@ -128,6 +134,7 @@ namespace GameRes.Formats.Qlie
GameKeyData = game_key; GameKeyData = game_key;
var key_data = file.View.ReadBytes (file.MaxOffset-0x41C, 0x100); var key_data = file.View.ReadBytes (file.MaxOffset-0x41C, 0x100);
ArcKey = CalculateHash (key_data, key_data.Length) & 0x0FFFFFFFu; ArcKey = CalculateHash (key_data, key_data.Length) & 0x0FFFFFFFu;
NameKey = (int)ArcKey;
} }
public override uint CalculateHash (byte[] data, int length) public override uint CalculateHash (byte[] data, int length)
@ -234,6 +241,7 @@ namespace GameRes.Formats.Qlie
{ {
var key_data = file.View.ReadBytes (file.MaxOffset-0x41C, 0x100); var key_data = file.View.ReadBytes (file.MaxOffset-0x41C, 0x100);
ArcKey = CalculateHash (key_data, key_data.Length) & 0x0FFFFFFFu; ArcKey = CalculateHash (key_data, key_data.Length) & 0x0FFFFFFFu;
NameKey = (int)ArcKey;
} }
public override uint CalculateHash (byte[] data, int length) public override uint CalculateHash (byte[] data, int length)
@ -263,7 +271,7 @@ namespace GameRes.Formats.Qlie
{ {
int char_count = name_length / 2; int char_count = name_length / 2;
int hash = (char_count * char_count) ^ char_count; int hash = (char_count * char_count) ^ char_count;
hash ^= (int)(0x3E13 ^ (ArcKey >> 16) ^ ArcKey); hash ^= 0x3E13 ^ (NameKey >> 16) ^ NameKey;
hash &= 0xFFFF; hash &= 0xFFFF;
int key = hash; int key = hash;
for (int i = 0; i < char_count; ++i) for (int i = 0; i < char_count; ++i)