// Helper methods
protected void LoadOuterManifest()
{
if (InnerProxy.Manifest.RootDirectory.Files.ContainsKey(
DefaultOuterManifestFileName) == false)
{
throw new Exception("Encrypted manifest is not present.");
}
ManifestFileInfo outerManifestManifestFileInfo =
InnerProxy.Manifest.RootDirectory.Files[
DefaultOuterManifestFileName];
FileInfo outerManifestFileInfo =
InnerProxy.GetFile(outerManifestManifestFileInfo);
Stream outerManifestFileStream =
outerManifestFileInfo.OpenRead();
byte[] outerKeyBytes = CryptUtilities.MakeKeyBytesFromString(
OuterKeyString,
InnerProxy.Manifest.Guid.ToByteArray());
Stream outerManifestCryptoStream =
CryptUtilities.MakeDecryptionReadStreamFrom(
outerManifestFileStream,
outerKeyBytes);
OuterManifest =
Manifest.ReadManifestStream(outerManifestCryptoStream);
outerManifestCryptoStream.Close();
}
public FileInfo CloneFile(
ManifestFileInfo copyFile,
DirectoryInfo copyToDirectory)
{
ManifestFileInfo innerManifestFileInfo =
HashToInnerFileMap[copyFile.FileHash];
FileInfo innerFileInfo =
InnerProxy.GetFile(innerManifestFileInfo);
byte[] keyData = CryptUtilities.MakeKeyBytesFromString(
OuterKeyString,
copyFile.FileHash.HashData);
String destFilePath =
Path.Combine(
copyToDirectory.FullName,
DefaultDecryptedTempFileName);
ReadCryptFile(
innerFileInfo,
keyData,
destFilePath);
FileInfo fileInfo =
new FileInfo(destFilePath);
// Make sure that the last-modified date matches that of the
// expected outer file. This is necessary because one inner file
// may correspond to several outer files - each of which might
// have separate dates.
fileInfo.LastWriteTimeUtc = copyFile.LastModifiedUtc;
return(fileInfo);
}
protected void ValidateFile(
ManifestFileInfo outerManFileInfo,
Utilities.Console console)
{
ManifestFileInfo innerManifestFileInfo = null;
try
{
innerManifestFileInfo =
HashToInnerFileMap[outerManFileInfo.FileHash];
FileInfo innerFileInfo =
InnerProxy.GetFile(innerManifestFileInfo);
byte[] keyData = CryptUtilities.MakeKeyBytesFromString(
OuterKeyString,
outerManFileInfo.FileHash.HashData);
Stream sourceFileStream =
innerFileInfo.OpenRead();
Stream cryptoStream =
CryptUtilities.MakeDecryptionReadStreamFrom(
sourceFileStream,
keyData);
FileHash computedHash = FileHash.ComputeHash(
cryptoStream,
outerManFileInfo.FileHash.HashType);
if (computedHash.Equals(outerManFileInfo.FileHash) == false)
{
throw new Exception("FAILED VALIDATION");
}
}
catch (Exception e)
{
console.WriteLine(
Manifest.MakeStandardPathString(outerManFileInfo));
console.WriteLine(
Manifest.MakeNativePathString(innerManifestFileInfo));
console.WriteLine(e.Message);
console.WriteLine();
}
}