public override void Convert(BlowfishNET.BlowfishECB ECB, AlgorithmType newalgorithm)
{
ecb = ECB;
oldalgorithm = algorithm;
algorithm = newalgorithm;
if (compressedmem == null)
{
LoadAndCompress();
}
if (oldalgorithm == algorithm || compressedsize < BlowfishNET.BlowfishECB.BLOCK_SIZE)
{
return;
}
int encryptlen = (int)compressedsize;
if (encryptlen % BlowfishNET.BlowfishECB.BLOCK_SIZE != 0)
{
encryptlen -= encryptlen % BlowfishNET.BlowfishECB.BLOCK_SIZE;
}
byte [] tmp = (byte [])compressedmem.GetBuffer().Clone();
if (algorithm == AlgorithmType.infilateandblowfish)
{
ecb.Encrypt(tmp, 0, compressedmem.GetBuffer(), 0, encryptlen);
}
else
{
ecb.Decrypt(tmp, 0, compressedmem.GetBuffer(), 0, encryptlen);
}
adler32 = AdlerCheckSum.GetAdler32(compressedmem, 0, (int)compressedmem.Length);
}
public static Kom2SubFileFromKom ReadSubFileFromKom(BlowfishNET.BlowfishECB CBC, string komfilename, System.Xml.XmlElement node, UInt32 offset)
{
Kom2SubFileFromKom subfile = new Kom2SubFileFromKom();
subfile.ecb = CBC;
subfile.filename = komfilename;
subfile.ReadHeader(node);
subfile.offset = offset;
return(subfile);
}
public void Close()
{
adler32 = 0;
header_size = 0;
filetime = 0;
foreach (System.Collections.Generic.KeyValuePair <string, Kom2SubFile> KeyValue in subfiles)
{
KeyValue.Value.Close();
}
subfiles.Clear();
ecb = null;
komtype = EKomType.notkom;
}
public bool Decrypt()
{
if (ecb == null)
{
return(false);
}
foreach (System.Collections.Generic.KeyValuePair <string, Kom2SubFile> KeyValue in subfiles)
{
if ((Kom2SubFile.AlgorithmType)KeyValue.Value.Algorithm == Kom2SubFile.AlgorithmType.infilateandblowfish) // 인크립트 되있으면 풀자
{
KeyValue.Value.Convert(ecb, Kom2SubFile.AlgorithmType.infilate);
}
}
ecb = null;
komtype = EKomType.newkom;
return(true);
}
public override void Convert(BlowfishNET.BlowfishECB ECB, AlgorithmType newalgorithm)
{
ecb = ECB;
algorithm = newalgorithm;
if (oldalgorithm == algorithm || compressedsize < BlowfishNET.BlowfishECB.BLOCK_SIZE)
{
compressedmem = null;
return;
}
int encryptlen = (int)compressedsize;
compressedmem = new System.IO.MemoryStream();
System.IO.FileStream filestream = new System.IO.FileStream(filename, System.IO.FileMode.Open, System.IO.FileAccess.Read);
filestream.Position = offset;
byte[] data = new byte[encryptlen];
filestream.Read(data, 0, encryptlen);
byte[] tmp = (byte[])data.Clone();
if (encryptlen % BlowfishNET.BlowfishECB.BLOCK_SIZE != 0)
{
encryptlen -= encryptlen % BlowfishNET.BlowfishECB.BLOCK_SIZE;
}
if (algorithm == AlgorithmType.infilateandblowfish)
{
ecb.Encrypt(tmp, 0, data, 0, encryptlen);
}
else
{
ecb.Decrypt(tmp, 0, data, 0, encryptlen);
}
compressedmem.Write(data, 0, (int)compressedsize);
adler32 = AdlerCheckSum.GetAdler32(compressedmem, 0, (int)compressedmem.Length);
filestream.Close();
}
public void SetECB(string pw)
{
byte[] key = System.Text.Encoding.ASCII.GetBytes(pw);
ecb = new BlowfishNET.BlowfishECB(key, 0, key.Length);
komtype = EKomType.encrypt;
}
public abstract void Convert(BlowfishNET.BlowfishECB ECB, AlgorithmType newalgorithm);
