Git-Mirrors/RetroShare
1
0
Fork 0
mirror of https://github.com/RetroShare/RetroShare.git synced 2024-12-25 15:39:27 -05:00
Code Issues Actions Packages Projects Releases Wiki Activity

added deterministic but unredictable hash generation for dir hashes, which should be preserved accross reboots. Should fix the msg from friends sending requests for the "wrong" dir hashes.

Browse Source
This commit is contained in:
csoler 2016-10-12 23:20:38 +02:00
parent 3c5e12ae84
commit bd9a464d11
8 changed files with 63 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
libretroshare/src/file_sharing/dir_hierarchy.cc
View File

@ -149,7 +149,7 @@ bool InternalFileHierarchyStorage::isIndexValid(DirectoryStorage::EntryIndex e)
return e < mNodes.size() && mNodes[e] != NULL ;
}
bool InternalFileHierarchyStorage::updateSubDirectoryList(const DirectoryStorage::EntryIndex& indx,const std::map<std::string,time_t>& subdirs)
bool InternalFileHierarchyStorage::updateSubDirectoryList(const DirectoryStorage::EntryIndex& indx,const std::map<std::string,time_t>& subdirs,const RsFileHash& random_hash_seed)
{
if(!checkIndex(indx,FileStorageNode::TYPE_DIR))
return false;
@ -190,7 +190,7 @@ bool InternalFileHierarchyStorage::updateSubDirectoryList(const DirectoryStorage
de->parent_index = indx;
de->dir_modtime = 0;// forces parsing.it->second;
de->dir_parent_path = d.dir_parent_path + "/" + d.dir_name ;
de->dir_hash = createDirHash(de->dir_name,de->dir_parent_path) ;
de->dir_hash = createDirHash(de->dir_name,d.dir_hash,random_hash_seed) ;
mDirHashes[de->dir_hash] = mNodes.size() ;
@ -201,7 +201,7 @@ bool InternalFileHierarchyStorage::updateSubDirectoryList(const DirectoryStorage
return true;
}
RsFileHash InternalFileHierarchyStorage::createDirHash(const std::string &/*dir_name*/, const std::string &/*dir_parent_path*/)
RsFileHash InternalFileHierarchyStorage::createDirHash(const std::string& dir_name, const RsFileHash& dir_parent_hash, const RsFileHash& random_hash_salt)
{
// What we need here: a unique identifier
// - that cannot be bruteforced to find the real directory name and path
@ -215,7 +215,19 @@ RsFileHash InternalFileHierarchyStorage::createDirHash(const std::string &/*dir_
// Option 3: just compute something random, but then we need to store it so as to not
// confuse friends when restarting.
return RsFileHash::random();
RsTemporaryMemory mem(dir_name.size() + 2*RsFileHash::SIZE_IN_BYTES) ;
memcpy( mem, random_hash_salt.toByteArray(),RsFileHash::SIZE_IN_BYTES) ;
memcpy(&mem[ RsFileHash::SIZE_IN_BYTES], dir_parent_hash.toByteArray(),RsFileHash::SIZE_IN_BYTES) ;
memcpy(&mem[2*RsFileHash::SIZE_IN_BYTES],dir_name.c_str(), dir_name.size()) ;
RsFileHash res = RsDirUtil::sha1sum( mem,mem.size() ) ;
#ifdef DEBUG_DIRECTORY_STORAGE
std::cerr << "Creating new dir hash for dir " << dir_name << ", parent dir hash=" << dir_parent_hash << " seed=[hidden]" << " result is " << res << std::endl;
#endif
return res ;
}
bool InternalFileHierarchyStorage::removeDirectory(DirectoryStorage::EntryIndex indx) // no reference here! Very important. Otherwise, the messign we do inside can change the value of indx!!

4
libretroshare/src/file_sharing/dir_hierarchy.h
View File

@ -95,7 +95,7 @@ public:
int parentRow(DirectoryStorage::EntryIndex e);
bool isIndexValid(DirectoryStorage::EntryIndex e) const;
bool getChildIndex(DirectoryStorage::EntryIndex e,int row,DirectoryStorage::EntryIndex& c) const;
bool updateSubDirectoryList(const DirectoryStorage::EntryIndex& indx,const std::map<std::string,time_t>& subdirs);
bool updateSubDirectoryList(const DirectoryStorage::EntryIndex& indx, const std::map<std::string,time_t>& subdirs, const RsFileHash &random_hash_seed);
bool removeDirectory(DirectoryStorage::EntryIndex indx) ;
bool checkIndex(DirectoryStorage::EntryIndex indx,uint8_t type) const;
bool updateSubFilesList(const DirectoryStorage::EntryIndex& indx,const std::map<std::string,DirectoryStorage::FileTS>& subfiles,std::map<std::string,DirectoryStorage::FileTS>& new_files);
@ -153,7 +153,7 @@ public:
private:
void recursPrint(int depth,DirectoryStorage::EntryIndex node) const;
static bool nodeAccessError(const std::string& s);
static RsFileHash createDirHash(const std::string& dir_name,const std::string& dir_parent_path) ;
static RsFileHash createDirHash(const std::string& dir_name, const RsFileHash &dir_parent_hash, const RsFileHash &random_hash_salt) ;
// Allocates a new entry in mNodes, possible re-using an empty slot and returns its index.

4
libretroshare/src/file_sharing/directory_storage.cc
View File

@ -127,10 +127,10 @@ bool DirectoryStorage::setDirectoryUpdateTime (EntryIndex index,time_t update
bool DirectoryStorage::setDirectoryRecursModTime(EntryIndex index,time_t rec_md_TS) { RS_STACK_MUTEX(mDirStorageMtx) ; return mFileHierarchy->setTS(index,rec_md_TS,&InternalFileHierarchyStorage::DirEntry::dir_most_recent_time); }
bool DirectoryStorage::setDirectoryLocalModTime (EntryIndex index,time_t loc_md_TS) { RS_STACK_MUTEX(mDirStorageMtx) ; return mFileHierarchy->setTS(index,loc_md_TS,&InternalFileHierarchyStorage::DirEntry::dir_modtime ); }
bool DirectoryStorage::updateSubDirectoryList(const EntryIndex& indx,const std::map<std::string,time_t>& subdirs)
bool DirectoryStorage::updateSubDirectoryList(const EntryIndex& indx,const std::map<std::string,time_t>& subdirs,const RsFileHash& hash_salt)
{
RS_STACK_MUTEX(mDirStorageMtx) ;
bool res = mFileHierarchy->updateSubDirectoryList(indx,subdirs) ;
bool res = mFileHierarchy->updateSubDirectoryList(indx,subdirs,hash_salt) ;
locked_check() ;
return res ;
}

2
libretroshare/src/file_sharing/directory_storage.h
View File

@ -133,7 +133,7 @@ class DirectoryStorage
// Sets the subdirectory/subfiles list of entry indx the supplied one, possible adding and removing directories (resp.files). New directories are set empty with
// just a name and need to be updated later on. New files are returned in a list so that they can be sent to hash cache.
//
bool updateSubDirectoryList(const EntryIndex& indx, const std::map<std::string, time_t> &subdirs) ;
bool updateSubDirectoryList(const EntryIndex& indx, const std::map<std::string, time_t> &subdirs, const RsFileHash &random_hash_salt) ;
bool updateSubFilesList(const EntryIndex& indx, const std::map<std::string, FileTS> &subfiles, std::map<std::string, FileTS> &new_files) ;
bool removeDirectory(const EntryIndex& indx) ;

10
libretroshare/src/file_sharing/directory_updater.cc
View File

@ -88,6 +88,12 @@ void LocalDirectoryUpdater::forceUpdate()
void LocalDirectoryUpdater::sweepSharedDirectories()
{
if(mHashSalt.isNull())
{
std::cerr << "(EE) no salt value in LocalDirectoryUpdater. Is that a bug?" << std::endl;
return ;
}
RsServer::notify()->notifyListPreChange(NOTIFY_LIST_DIRLIST_LOCAL, 0);
#ifdef DEBUG_LOCAL_DIR_UPDATER
std::cerr << "[directory storage] LocalDirectoryUpdater::sweep()" << std::endl;
@ -109,7 +115,7 @@ void LocalDirectoryUpdater::sweepSharedDirectories()
// make sure that entries in stored_dir_it are the same than paths in real_dir_it, and in the same order.
mSharedDirectories->updateSubDirectoryList(mSharedDirectories->root(),sub_dir_list) ;
mSharedDirectories->updateSubDirectoryList(mSharedDirectories->root(),sub_dir_list,mHashSalt) ;
// now for each of them, go recursively and match both files and dirs
@ -177,7 +183,7 @@ void LocalDirectoryUpdater::recursUpdateSharedDir(const std::string& cumulated_p
// update file and dir lists for current directory.
mSharedDirectories->updateSubDirectoryList(indx,subdirs) ;
mSharedDirectories->updateSubDirectoryList(indx,subdirs,mHashSalt) ;
std::map<std::string,DirectoryStorage::FileTS> new_files ;
mSharedDirectories->updateSubFilesList(indx,subfiles,new_files) ;

5
libretroshare/src/file_sharing/directory_updater.h
View File

@ -41,6 +41,9 @@ public:
void forceUpdate();
bool inDirectoryCheck() const ;
void setHashSalt(const RsFileHash& hash) { mHashSalt = hash; }
const RsFileHash& hashSalt() const { return mHashSalt; }
void setFileWatchPeriod(int seconds) ;
uint32_t fileWatchPeriod() const ;
@ -60,6 +63,8 @@ private:
HashStorage *mHashCache ;
LocalDirectoryStorage *mSharedDirectories ;
RsFileHash mHashSalt ;
time_t mLastSweepTime;
time_t mLastTSUpdateTime;

1
libretroshare/src/file_sharing/file_sharing_defaults.h
View File

@ -33,6 +33,7 @@ static const uint32_t DELAY_BETWEEN_LOCAL_DIRECTORIES_TS_UPDATE = 20 ; // 20 se
static const std::string HASH_CACHE_DURATION_SS = "HASH_CACHE_DURATION" ; // key string to store hash remembering time
static const std::string WATCH_FILE_DURATION_SS = "WATCH_FILES_DELAY" ; // key to store delay before re-checking for new files
static const std::string WATCH_FILE_ENABLED_SS = "WATCH_FILES_ENABLED"; // key to store ON/OFF flags for file whatch
static const std::string WATCH_HASH_SALT_SS = "WATCH_HASH_SALT"; // Salt that is used to hash directory names
static const std::string FILE_SHARING_DIR_NAME = "file_sharing" ; // hard-coded directory name to store friend file lists, hash cache, etc.
static const std::string HASH_CACHE_FILE_NAME = "hash_cache.bin" ; // hard-coded directory name to store encrypted hash cache.

20
libretroshare/src/file_sharing/p3filelists.cc
View File

@ -326,7 +326,14 @@ cleanup = true;
rskv->tlvkvs.pairs.push_back(kv);
}
{
RsTlvKeyValue kv;
kv.key = WATCH_HASH_SALT_SS;
kv.value = mLocalDirWatcher->hashSalt().toStdString();
rskv->tlvkvs.pairs.push_back(kv);
}
/* Add KeyValue to saveList */
sList.push_back(rskv);
@ -373,6 +380,11 @@ bool p3FileDatabase::loadList(std::list<RsItem *>& load)
{
setWatchEnabled(kit->value == "YES") ;
}
else if(kit->key == WATCH_HASH_SALT_SS)
{
std::cerr << "Initing directory watcher with saved secret salt..." << std::endl;
mLocalDirWatcher->setHashSalt(RsFileHash(kit->value)) ;
}
delete *it ;
continue ;
}
@ -398,6 +410,14 @@ bool p3FileDatabase::loadList(std::list<RsItem *>& load)
delete *it ;
}
if(mLocalDirWatcher->hashSalt().isNull())
{
std::cerr << "(WW) Initialising directory watcher salt to some random value " << std::endl;
mLocalDirWatcher->setHashSalt(RsFileHash::random()) ;
IndicateConfigChanged();
}
/* set directories */
mLocalSharedDirs->setSharedDirectoryList(dirList);