bool Request::addTarget(const BinaryString &target, bool finished)
{
if(mPath.empty() || target.empty()) return false;
String prefix = mPath;
if(prefix.size() >= 2 && prefix[prefix.size()-1] == '/')
prefix.resize(prefix.size()-1);
mFinishedAfterTarget|= finished;
return incoming(Network::Locator(prefix, "/", link()) , target);
}
String Cache::path(const BinaryString &digest) const
{
Assert(!digest.empty());
return mDirectory + Directory::Separator + digest.toString();
}
void Resource::process(const String &filename, const String &name, const String &type, const String &secret)
{
BinaryString salt;
// If secret is not empty then this is an encrypted resource
if(!secret.empty())
{
// Generate salt from plaintext
// Because we need to be able to recognize data is identical even when encrypted
BinaryString digest;
File file(filename, File::Read);
Sha256().compute(file, digest);
Sha256().pbkdf2_hmac(digest, type, salt, 32, 100000);
Assert(!salt.empty());
}
// Fill index record
delete mIndexRecord;
int64_t size = File::Size(filename);
mIndexRecord = new Resource::IndexRecord;
mIndexRecord->name = name;
mIndexRecord->type = type;
mIndexRecord->size = size;
mIndexRecord->salt = salt;
mIndexRecord->blockDigests.reserve(size/Block::Size);
// Process blocks
File file(filename, File::Read);
BinaryString blockDigest;
if(!secret.empty())
{
BinaryString key;
Sha256().pbkdf2_hmac(secret, salt, key, 32, 100000);
uint64_t i = 0;
while(true)
{
BinaryString subsalt;
subsalt.writeBinary(i);
// Generate subkey
BinaryString subkey;
Sha256().pbkdf2_hmac(key, subsalt, subkey, 32, 100);
// Generate iv
BinaryString iv;
Sha256().pbkdf2_hmac(salt, subsalt, iv, 16, 100);
if(!Block::EncryptFile(file, subkey, iv, blockDigest))
break;
mIndexRecord->blockDigests.append(blockDigest);
++i;
}
}
else {
while(Block::ProcessFile(file, blockDigest))
mIndexRecord->blockDigests.append(blockDigest);
}
// Create index
String tempFileName = File::TempName();
File tempFile(tempFileName, File::Truncate);
BinarySerializer serializer(&tempFile);
serializer.write(mIndexRecord);
tempFile.close();
String indexFilePath = Cache::Instance->move(tempFileName);
// Create index block
delete mIndexBlock;
mIndexBlock = new Block(indexFilePath);
}