public bool DoPack(string SourceRootDirPath, string DestFileName, ulong RndSeed, string Psw)
{
// File construction:
// 1- random-seed (64 bit ulong) bytes 0,1,2,3,4,5,6,7
// 2- crc (32 bit uint) bytes 8,9,10,11
// 3- CIPHEROK (64 bit string) bytes 12,13,14,15
// 4- header-length (64 bit ulong) bytes 16,17,18,19,20,21,22,23
// 5- header-data (string) bytes 24,25, ...
// 6- body
if (SourceRootDirPath.Trim() == "")
{
return(false);
}
uint crc = 0;
Prompt(string.Format("Paking..."));
Prompt("--------------------------------");
List <string> Log = new List <string>();
BinaryWriter bw = null;
BinaryReader br = null;
byte[] buff_read = new byte[1024 * 1024];
string source_file = null;
if (File.Exists(SourceRootDirPath))
{
source_file = SourceRootDirPath;
}
try
{
MyCypher mc = new MyCypher(Psw, RndSeed);
KeyValPair kvp = ProvideHeader(SourceRootDirPath);
byte[] bytes_header = ASCIIEncoding.ASCII.GetBytes(kvp.GetStr());
bw = new BinaryWriter(new FileStream(DestFileName, FileMode.Create));
byte[] bytes_rnd_seed = BitConverter.GetBytes(RndSeed);
byte[] bytes_cipher_test = ASCIIEncoding.ASCII.GetBytes("CIPHEROK");
ulong header_length = (ulong)bytes_header.Length;
byte[] bytes_header_length = BitConverter.GetBytes(header_length);
// Random seed is written in plain-text (it is not ciphered)
bw.Write(bytes_rnd_seed);
crc ^= GetCrc(ref bytes_rnd_seed);
//--------------------------------------------------
// CRC is written in plain-text (it is not ciphered)
bw.Write(crc);
//--------------------------------------------------
mc.Cipher(ref bytes_cipher_test);
bw.Write(bytes_cipher_test);
crc ^= GetCrc(ref bytes_cipher_test);
//--------------------------------------------------
mc.Cipher(ref bytes_header_length);
bw.Write(bytes_header_length);
crc ^= GetCrc(ref bytes_header_length);
//--------------------------------------------------
mc.Cipher(ref bytes_header);
bw.Write(bytes_header);
crc ^= GetCrc(ref bytes_header);
//--------------------------------------------------
int file_count = Int16.Parse(kvp.GetVal("F.CNT"));
string file_full_name = "";
for (int i = 0; i < file_count; i++)
{
if (source_file != null)
{
file_full_name = source_file;
}
else
{
file_full_name = SourceRootDirPath + "\\" + kvp.GetVal(string.Format("F.{0}", i));
}
Prompt(string.Format("Packing File: {0}", file_full_name));
FileInfo fi = new FileInfo(file_full_name);
if (File.Exists(file_full_name) == false)
{
Log.Add(string.Format("'{0}' not found", file_full_name));
continue;
}
br = new BinaryReader(new FileStream(file_full_name, FileMode.Open));
int cnt = 0;
while (true)
{
cnt = br.Read(buff_read, 0, buff_read.Length);
if (cnt == 0)
{
break;
}
mc.Cipher(ref buff_read, cnt);
bw.Write(buff_read, 0, cnt);
crc ^= GetCrc(ref buff_read, cnt);
}
br.Close();
}
bw.Seek(8, SeekOrigin.Begin);
bw.Write(crc);
bw.Close();
Prompt("--------------------------------");
return(true);
}
catch (Exception ex)
{
if (bw != null)
{
try
{
bw.Close();
}
catch { }
}
throw new Exception(string.Format("Unable to pack folder '{0}'.\n{1}", ex.Message));
}
}