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(BinboCrypt): another ShiinaRio decryptor.

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This commit is contained in:
morkt 2016-10-08 08:38:01 +04:00
parent a533235c1b
commit be433288b2
2 changed files with 140 additions and 2 deletions
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140
ArcFormats/ShiinaRio/WarcEncryption.cs
View File

@ -975,9 +975,9 @@ namespace GameRes.Formats.ShiinaRio
}
[Serializable]
public class AdlerCrypt : KeyDecryptBase
public class KeyAdlerCrypt : KeyDecryptBase
{
public AdlerCrypt (uint key) : base (key, null)
public KeyAdlerCrypt (uint key) : base (key, null)
{
}
@ -990,4 +990,140 @@ namespace GameRes.Formats.ShiinaRio
data[index + 0x207] ^= (byte)(key >> 24);
}
}
[Serializable]
public class AdlerCrypt : IDecryptExtra
{
public void Decrypt (byte[] data, int index, uint length, uint flags)
{
if (length >= 0x400 && (flags & 0x204) == 0x204)
Transform (data, index, 0xFF);
}
public void Encrypt (byte[] data, int index, uint length, uint flags)
{
if (length >= 0x400 && (flags & 0x104) == 0x104)
Transform (data, index, 0xFF);
}
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 BinboCrypt : IDecryptExtra
{
public void Decrypt (byte[] data, int index, uint length, uint flags)
{
if (length < 0x200)
return;
if ((flags & 0x204) == 0x204)
{
if (0x718E958D == LittleEndian.ToUInt32 (data, index))
{
var input = new byte[0x200];
Buffer.BlockCopy (data, index, input, 0, 0x200);
var reader = new LzComp (input, 8);
reader.Unpack (data, index);
}
if (length > 0x200)
data[index + 0x200] ^= (byte)length;
if (length > 0x201)
data[index + 0x201] ^= (byte)(length >> 8);
if (length > 0x202)
data[index + 0x202] ^= (byte)(length >> 16);
if (length > 0x203)
data[index + 0x203] ^= (byte)(length >> 24);
}
}
public void Encrypt (byte[] data, int index, uint length, uint flags)
{
if (length < 0x200)
return;
if ((flags & 0x104) == 0x104)
{
throw new NotImplementedException();
}
}
sealed class LzComp
{
byte[] m_input;
int m_src;
uint m_bits;
int m_bits_count;
public LzComp (byte[] input, int index)
{
m_input = input;
m_src = index;
}
public void Unpack (byte[] output, int dst)
{
FillBitCache();
while (m_src < m_input.Length)
{
if (GetBit() != 0)
{
output[dst++] = m_input[m_src++];
continue;
}
int count, offset;
if (GetBit() != 0)
{
count = LittleEndian.ToUInt16 (m_input, m_src);
m_src += 2;
offset = count >> 3 | -0x2000;
count &= 7;
if (count > 0)
{
count += 2;
}
else
{
count = m_input[m_src++];
if (0 == count)
break;
count += 9;
}
}
else
{
count = GetBit() << 1;
count |= GetBit();
count += 2;
offset = m_input[m_src++] | -0x100;
}
Binary.CopyOverlapped (output, dst+offset, dst, count);
dst += count;
}
}
int GetBit ()
{
uint v = m_bits >> --m_bits_count;
if (m_bits_count <= 0)
{
FillBitCache();
}
return (int)(v & 1);
}
void FillBitCache ()
{
m_bits = LittleEndian.ToUInt32 (m_input, m_src);
m_src += 4;
m_bits_count = 32;
}
}
}
}

2
supported.html
View File

@ -421,6 +421,7 @@ Enkaku Sousa <span class="footnote">2.36 or 2.37</span><br/>
Gensou no Idea ~Oratorio Phantasm Historia~<span class="footnote">ShiinaRio v2.49</span><br/>
Gohoushi Nurse ~Mayonaka no Kyousei Call~ <span class="footnote">ShiinaRio v2.50</span><br/>
Helter Skelter <span class="footnote">ShiinaRio v2.40</span><br/>
Hin wa Bokura no Fuku no Kami <span class="footnote">ShiinaRio v2.49</span><br/>
Hitozuma Onna Kyoushi Reika <span class="footnote">ShiinaRio v2.39</span><br/>
Intruder <span class="footnote">ShiinaRio v2.49</span><br/>
Itsuka, Dokoka de ~Ano Ameoto no Kioku~<span class="footnote">2.36 or 2.37</span><br/>
@ -1068,6 +1069,7 @@ Aneboku ~Onee-chan wa Bijin 3 Shimai~<br/>
Aniyome Kyouka-san to Sono Haha Chikako-san<br/>
Aru Kazoku no Kankeizu<br/>
Chou no Yume ~Futari no Chou~<br/>
Choumajuu! ~Seieki Juuten Dungeon Kouryaku~<br/>
Cosplay Ecchi ~Layer Kana no Yuuutsu~<br/>
Etsuraku no Tane<br/>
Fuka no Jugoku<br/>