protected void SaveOuterManifest()
{
// Serialize the manifest to memory
MemoryStream serializedManifestStream =
new MemoryStream();
OuterManifest.WriteManifestStream(serializedManifestStream);
serializedManifestStream.Position = 0;
String tempFilePath =
Path.Combine(
InnerProxy.TempDirectory.FullName,
DefaultOuterManifestFileName);
// We use the inner GUID as salt for the outer manifest, so update
// it each time we write the outer manifest. The inner GUID is
// really useless anyways.
InnerProxy.Manifest.ChangeGUID();
byte[] outerKeyData = CryptUtilities.MakeKeyBytesFromString(
OuterKeyString,
InnerProxy.Manifest.Guid.ToByteArray());
byte[] cryptHash = WriteCryptFileAndHash(
serializedManifestStream,
outerKeyData,
tempFilePath);
// The new ManifestFileInfo is actually rooted in the inner
// Manifest object, but that is ok - although it is kind of a
// hack. The fact is that we don't maintain an actual Manifest
// object to mirror the inner manifest - and we know that the
// implementation of PutFile won't be affected by doing this.
ManifestDirectoryInfo parentDirectory =
InnerProxy.Manifest.RootDirectory;
ManifestFileInfo destManifestFile =
new ManifestFileInfo(
DefaultOuterManifestFileName,
parentDirectory);
destManifestFile.RegisteredUtc = DateTime.Now;
FileInfo outerManifestFileInfo = new FileInfo(tempFilePath);
destManifestFile.LastModifiedUtc =
outerManifestFileInfo.LastWriteTimeUtc;
destManifestFile.FileLength =
outerManifestFileInfo.Length;
destManifestFile.FileHash =
new FileHash(cryptHash, CryptUtilities.DefaultHashType);
InnerProxy.PutFile(ProxyToInner, destManifestFile);
}
public void PutFile(
IRepositoryProxy sourceRepository,
ManifestFileInfo sourceManifestFile)
{
// Name the inner file with the hash of the hash. We protect
// the hash in this way because it is used as the salt to
// encrypt the data in the file, and it might provide some
// benefit to a cryptographic attack.
FileHash hashedHash = FileHash.ComputeHash(
sourceManifestFile.FileHash.HashData);
String hashedHashString = hashedHash.ToString();
// Only add the file data if we don't have it already.
if (myHashedStringMap.ContainsKey(hashedHashString) == false)
{
FileInfo sourceFileInfo =
sourceRepository.GetFile(sourceManifestFile);
byte[] keyData = CryptUtilities.MakeKeyBytesFromString(
OuterKeyString,
sourceManifestFile.FileHash.HashData);
// Use the inner proxy temp directory because that is likely
// the ultimate destination of the file and we don't want to
// copy the data if we can avoid it. This is a minor break in
// encapsulation but has a significant impact on performance.
String destFilePath =
Path.Combine(
InnerProxy.TempDirectory.FullName,
hashedHashString);
Stream sourceFileStream = sourceFileInfo.OpenRead();
byte[] cryptHash = WriteCryptFileAndHash(
sourceFileStream,
keyData,
destFilePath);
FileInfo cryptFileInfo =
new FileInfo(destFilePath);
// Make a dummy parent manifest directory to give to the inner
// proxy. This is actually rooted in the inner manifest, but
// that is ok - although it is kind of a hack. The fact is
// that we don't maintain an actual manifest to mirror the
// inner manifest - and we know that the implementation of
// PutFile won't be affected by doing this.
ManifestDirectoryInfo parentDirectory =
MakeInnerParentDirectory(
hashedHashString,
InnerProxy.Manifest.RootDirectory);
ManifestFileInfo destManifestFile =
new ManifestFileInfo(
hashedHashString,
parentDirectory);
destManifestFile.RegisteredUtc =
DateTime.UtcNow;
destManifestFile.LastModifiedUtc =
cryptFileInfo.LastWriteTimeUtc;
destManifestFile.FileLength =
cryptFileInfo.Length;
destManifestFile.FileHash =
new FileHash(cryptHash, CryptUtilities.DefaultHashType);
InnerProxy.PutFile(ProxyToInner, destManifestFile);
myHashedStringMap.Add(hashedHashString, destManifestFile);
myNeedToRegenerateFileMap = true;
}
ManifestFileInfo outerManifestFileInfo =
Manifest.PutFileFromOtherManifest(sourceManifestFile);
myManifestChanged = true;
}