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(WARC): added PostAdlerCrypt/PreAdlerCrypt.

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This commit is contained in:
morkt 2018-12-19 03:32:19 +04:00
parent c6f04a06e6
commit 0c4dc5a679
1 changed files with 27 additions and 7 deletions
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34
ArcFormats/ShiinaRio/WarcEncryption.cs
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@ -1054,7 +1054,20 @@ namespace GameRes.Formats.ShiinaRio
}
[Serializable]
public class AdlerCrypt : IDecryptExtra
public class AdlerCrypt
{
internal void Transform (byte[] data, int index, int length)
{
uint key = Adler32.Compute (data, index, length);
data[index + 0x200] ^= (byte)key;
data[index + 0x201] ^= (byte)(key >> 8);
data[index + 0x202] ^= (byte)(key >> 16);
data[index + 0x203] ^= (byte)(key >> 24);
}
}
[Serializable]
public class PostAdlerCrypt : AdlerCrypt, IDecryptExtra
{
public void Decrypt (byte[] data, int index, uint length, uint flags)
{
@ -1067,14 +1080,21 @@ namespace GameRes.Formats.ShiinaRio
if (length >= 0x400 && (flags & 0x104) == 0x104)
Transform (data, index, 0xFF);
}
}
void Transform (byte[] data, int index, int length)
[Serializable]
public class PreAdlerCrypt : AdlerCrypt IDecryptExtra
{
public void Decrypt (byte[] data, int index, uint length, uint flags)
{
uint key = Adler32.Compute (data, index, length);
data[index + 0x200] ^= (byte)key;
data[index + 0x201] ^= (byte)(key >> 8);
data[index + 0x202] ^= (byte)(key >> 16);
data[index + 0x203] ^= (byte)(key >> 24);
if (length >= 0x400 && (flags & 0x202) == 0x202)
Transform (data, index, 0xFF);
}
public void Encrypt (byte[] data, int index, uint length, uint flags)
{
if (length >= 0x400 && (flags & 0x102) == 0x102)
Transform (data, index, 0xFF);
}
}