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(KiriKiri): another encryption algorithm.

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This commit is contained in:
morkt 2016-10-31 23:10:44 +04:00
parent 8238e0fa20
commit d7e6bab608
2 changed files with 30 additions and 1 deletions
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4
ArcFormats/KiriKiri/ArcXP3.cs
View File

@ -152,7 +152,9 @@ namespace GameRes.Formats.KiriKiri
if (entry_size < 0)
return null;
dir_offset += 12 + entry_size;
if (0x6E666E68 == entry_signature || 0x46696C65 == entry_signature) // "hnfn" || "eliF"
if (0x6E666E68 == entry_signature // "hnfn"
|| 0x6C696D73 == entry_signature // "smil"
|| 0x46696C65 == entry_signature) // "eliF"
{
uint hash = header.ReadUInt32();
int name_size = header.ReadInt16();

27
ArcFormats/KiriKiri/CryptAlgorithms.cs
View File

@ -822,4 +822,31 @@ namespace GameRes.Formats.KiriKiri
Decrypt (entry, offset, values, pos, count);
}
}
[Serializable]
public class SmileCrypt : ICrypt
{
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
uint hash = entry.Hash ^ 0xD0F0BA7B;
byte key = (byte)(hash ^ (hash >> 8) ^ (hash >> 16) ^ (hash >> 24));
if (0 == key)
key = 0x5E;
if (0 == offset && count > 0)
{
if (0 == (hash & 0xFF))
hash = 0x7B;
values[pos] ^= (byte)hash;
}
for (int i = 0; i < count; ++i)
{
values[pos+i] ^= key;
}
}
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
{
Decrypt (entry, offset, values, pos, count);
}
}
}