public NpkStream(NpkArchive arc, NpkEntry entry)
{
m_file = arc.File;
m_encryption = arc.Encryption;
m_segment = entry.Segments.GetEnumerator();
NextSegment();
}
public override ArcFile TryOpen(ArcView file)
{
int count = file.View.ReadInt32(0x18);
if (!IsSaneCount(count))
{
return(null);
}
var key = QueryEncryption(file.Name);
if (null == key)
{
return(null);
}
var aes = Aes.Create();
try
{
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
aes.Key = key;
aes.IV = file.View.ReadBytes(8, 0x10);
uint index_size = file.View.ReadUInt32(0x1C);
using (var decryptor = aes.CreateDecryptor())
using (var enc_index = file.CreateStream(0x20, index_size))
using (var dec_index = new CryptoStream(enc_index, decryptor, CryptoStreamMode.Read))
using (var index = new ArcView.Reader(dec_index))
{
var dir = ReadIndex(index, count, file.MaxOffset);
if (null == dir)
{
return(null);
}
var arc = new NpkArchive(file, this, dir, aes);
aes = null; // object ownership passed to NpkArchive, don't dispose
return(arc);
}
}
finally
{
if (aes != null)
{
aes.Dispose();
}
}
}
public NpkStream(NpkArchive arc, NpkEntry entry)
{
m_file = arc.File;
m_encryption = arc.Encryption;
m_segment = entry.Segments.GetEnumerator();
NextSegment();
}
public override ArcFile TryOpen(ArcView file)
{
int count = file.View.ReadInt32 (0x18);
if (!IsSaneCount (count))
return null;
var key = QueryEncryption();
if (null == key)
return null;
var aes = Aes.Create();
try
{
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
aes.Key = key;
aes.IV = file.View.ReadBytes (8, 0x10);
uint index_size = file.View.ReadUInt32 (0x1C);
using (var decryptor = aes.CreateDecryptor())
using (var enc_index = file.CreateStream (0x20, index_size))
using (var dec_index = new CryptoStream (enc_index, decryptor, CryptoStreamMode.Read))
using (var index = new ArcView.Reader (dec_index))
{
var dir = ReadIndex (index, count, file.MaxOffset);
if (null == dir)
return null;
var arc = new NpkArchive (file, this, dir, aes);
aes = null; // object ownership passed to NpkArchive, don't dispose
return arc;
}
}
finally
{
if (aes != null)
aes.Dispose();
}
}
