private async Task DecodeFile(IEnumerable <string> encfiles)
{
foreach (var file in encfiles)
{
if (!File.Exists(file))
{
Log("file not found : {0}", file);
continue;
}
var decfilepath = Path.GetDirectoryName(file);
var encfilename = Path.GetFileName(file);
var enckey = Path.GetFileNameWithoutExtension(encfilename);
if (!Regex.IsMatch(encfilename, ".*?\\.[a-z0-9]{8}\\.enc$"))
{
Log("filename decode error : {0}", file);
continue;
}
var decfilename = Path.GetFileNameWithoutExtension(enckey);
var decfile = Path.Combine(decfilepath, decfilename);
if (File.Exists(decfile))
{
Log("Exists : {0}", decfile);
continue;
}
using (var efile = File.OpenRead(file))
using (var dfile = File.OpenWrite(decfile))
using (var cfile = new CryptCTR.AES256CTR_CryptStream(efile, enckey))
{
try
{
await cfile.CopyToAsync(dfile, 81920, cts.Token);
}
catch (Exception ex)
{
Log("Decode Error : {0}->{1} {2}", file, decfile, ex.Message);
continue;
}
}
Log("OK : {0}->{1}", file, decfile);
}
}
private async Task EncodeFile(IEnumerable <string> plainfiles)
{
foreach (var file in plainfiles)
{
if (!File.Exists(file))
{
Log("file not found : {0}", file);
continue;
}
var encfilepath = Path.GetDirectoryName(file);
var plainfilename = Path.GetFileName(file);
var enckey = plainfilename + "." + Path.GetFileNameWithoutExtension(Path.GetRandomFileName());
var encfilename = enckey + ".enc";
var encfile = Path.Combine(encfilepath, encfilename);
if (File.Exists(encfile))
{
Log("Exists : {0}", encfile);
continue;
}
using (var pfile = File.OpenRead(file))
using (var efile = File.OpenWrite(encfile))
using (var cfile = new CryptCTR.AES256CTR_CryptStream(pfile, enckey))
{
try
{
await cfile.CopyToAsync(efile, 81920, cts.Token);
}
catch (Exception ex)
{
Log("Encode Error : {0}->{1} {2}", file, encfile, ex.Message);
continue;
}
}
Log("OK : {0}->{1}", file, encfile);
}
}