internal string convertPassword(string password, AppConst.MPE_Flag flag)
{
if (flag.HasFlag(AppConst.MPE_Flag.isRemoveSpace))
{
password = Util.toRemoveInnerSpaces(password);
}
if (flag.HasFlag(AppConst.MPE_Flag.isIgnoreCase))
{
password = Util.toUpperCase(password);
}
if (flag.HasFlag(AppConst.MPE_Flag.isIgnoreZenHan))
{
password = Util.toZenkaku(password);
}
if (flag.HasFlag(AppConst.MPE_Flag.isIgnoreHiraKata))
{
password = Util.toHiragana(password);
}
return(password);
}
/**
* First zip the file and then encrypt it.
* (J) 最初にファイルをzip圧縮し、その後に暗号化する。
*
* encTargetList : Files or directories for encryption.
* hints : question's hint
* passwordLists : password List for hint.
* nRequiredPasswords : number of passwords are required for decryption.
* flag : Encryption flag
* outputFS : output file stream.
*/
internal static void Encrypt(
List <string> encTargetList,
string[] hints,
List <string>[] passwordLists,
int nRequiredPasswords,
AppConst.MPE_Flag flag,
FileStream outputFS,
IProgress <string> progress = null)
{
var tmpFileCompress = System.IO.Path.GetRandomFileName(); // temporary file name for zip file.
try
{
progress?.Report("(1/4) creating archive.");
// zip
CompressionLevel compressionLevel = flag.HasFlag(AppConst.MPE_Flag.isNoCompress) ? CompressionLevel.NoCompression : CompressionLevel.Optimal;
using (FileStream zipFS = File.Create(tmpFileCompress))
{
using (ZipArchive archive = new ZipArchive(zipFS, ZipArchiveMode.Create))
{
foreach (var item in encTargetList)
{
string rootPathFile = item.ToString();
if (File.Exists(rootPathFile))
{ // Add the file as it is.
//(J) ファイルはそのまま追加
archive.CreateEntryFromFile(rootPathFile, System.IO.Path.GetFileName(rootPathFile), compressionLevel);
}
else if (Directory.Exists(rootPathFile))
{ // Add directory recursively
//(J) ディレクトリは再帰的に追加
string parentPath = System.IO.Directory.GetParent(rootPathFile).ToString();
string[] pathFiles = Directory.GetFileSystemEntries(rootPathFile, "*", System.IO.SearchOption.AllDirectories);
if (pathFiles.Length == 0)
{ // Empty directory added only entry.
//(J) 空ディレクトリはエントリのみ追加
archive.CreateEntry(System.IO.Path.GetFullPath(rootPathFile).Substring(parentPath.Length + 1) + "/");
}
foreach (var pathFile in pathFiles)
{
string entryPath = pathFile.Substring(parentPath.Length + 1); // Archive the specified directory as root. (J)指定したディレクトリをルートとしてアーカイブ
if (File.Exists(pathFile))
{
archive.CreateEntryFromFile(pathFile, entryPath, compressionLevel);
}
else if (Directory.Exists(pathFile))
{
archive.CreateEntry(entryPath + "/");
}
}
}
}
}
}
// File is not properly terminated without Dispose().
// Dispose() archive, zipFS will also be closed(), so open it again.
//(J) 一旦 archive を Dispose() しないと正しくファイルが終端化されない。
//(J) archive を Dispose() すると zipFS も Close()されてしまうため、開きなおす。
progress?.Report("(2/4) encrypting archive.");
var tmpFileEncrypted = System.IO.Path.GetRandomFileName(); // temporary file name for encrypted file.
try
{
// encryption
RNGCryptoServiceProvider r = new RNGCryptoServiceProvider();
byte[] dataKey = new byte[Crypto.AES_KEY_SIZE_BYTE]; // Encryption key for data.
r.GetBytes(dataKey);
using (FileStream zipFS = File.Open(tmpFileCompress, FileMode.Open))
{
using (FileStream encryptedFS = File.Create(tmpFileEncrypted))
{
Crypto.encryptStream(zipFS, encryptedFS, dataKey);
}
}
// Since it became unnecessary, try to delete here
//(J) 不要になったのでここで削除を試みる
File.Delete(tmpFileCompress);
using (FileStream encryptedFS = File.Open(tmpFileEncrypted, FileMode.Open))
{
Encrypt_2(encryptedFS, hints, passwordLists, nRequiredPasswords, flag, r, dataKey, outputFS, progress);
}
progress?.Report("(4/4) finished.");
}
finally
{
File.Delete(tmpFileEncrypted);
}
}
finally
{
File.Delete(tmpFileCompress);
}
}