denyfs-0.2.0.tar.bz2 42Kb (source) sha1sum: 6aca575dcf53cc8064f96c7bfff0a57a1493ee8a
denyfs-0.2.0.ebuild 1Kb (gentoo/funtoo)

Should I precise unlimited under certain constraints; your environment especially the passwords entropy (generated by your kernel device), the size of the filesystem, the limitations of system open files and the hardware (especially the processor and the hard drive). Given a configured GNU/Linux system, denyfs can create a whole lot of hidden containers.

denyfs-0.2.0 ships a new –yes option that if passed will not ask you any question when it comes to resize. If you type in a wrong password then nothing will mount the process will fail. The usefulness of this option stands up during automated testings. It is advised to use the default behaviour.

‘dfstest’ is planned for the 0.2 branch but not yet ready. One step at a time. I’m currently writing it and the implementation is almost finished. I need to test dfstest before any release. Awesome, test the testers!

denyfs-0.2.0 supports hidden devices up to thousands. The maximum test yet performed so far succeeded in creating 1001 hidden devices of 512K size each (1 block) inside a 20Gb file in 129 minutes on a Gentoo Linux given appropriate ulimit rules:

openchill denyfs # uname -a
Linux openchill.org 2.6.30-gentoo-r2 #1 SMP Fri Jul 31 14:46:49 Local time zone must be set--see zic i686 Intel(R) Pentium(R) Dual CPU E2180 @ 2.00GHz GenuineIntel GNU/Linux
openchill denyfs # ulimit -a | grep open
open files (-n) 20048
openchill denyfs #

Such a command line would look like that (no space within the -d parameter, it’s just text formatting here):
openchill denyfs # dfsopen -f /tmp/fs -l loop0 -d
1=1,2=1,3=1,4=1,5=1,6=1,7=1,8=1,9=1,10=1,
11=1,12=1,13=1,14=1,15=1,16=1,17=1,18=1,19=1,20=1,
21=1,22=1,23=1,24=1,25=1,26=1,27=1,28=1,29=1,30=1,
31=1,32=1,33=1,34=1,35=1,36=1,37=1,38=1,39=1,40=1,
41=1,42=1,43=1,44=1,45=1,46=1,47=1,48=1,49=1,50=1,
51=1,52=1,53=1,54=1,55=1,56=1,57=1,58=1,59=1,60=1,
61=1,62=1,63=1,64=1,65=1,66=1,67=1,68=1,69=1,70=1,
71=1,72=1,73=1,74=1,75=1,76=1,77=1,78=1,79=1,80=1,
81=1,82=1,83=1,84=1,85=1,86=1,87=1,88=1,89=1,90=1,
91=1,92=1,93=1,94=1,95=1,96=1,97=1,98=1,99=1,100=1,
101=1,102=1,103=1,104=1,105=1,106=1,107=1,108=1,109=1,110=1,
111=1,112=1,113=1,114=1,115=1,116=1,117=1,118=1,119=1,120=1,
121=1,122=1,123=1,124=1,125=1,126=1,127=1,128=1,129=1,130=1,
131=1,132=1,133=1,134=1,135=1,136=1,137=1,138=1,139=1,140=1,
141=1,142=1,143=1,144=1,145=1,146=1,147=1,148=1,149=1,150=1,
151=1,152=1,153=1,154=1,155=1,156=1,157=1,158=1,159=1,160=1,
161=1,162=1,163=1,164=1,165=1,166=1,167=1,168=1,169=1,170=1,
171=1,172=1,173=1,174=1,175=1,176=1,177=1,178=1,179=1,180=1,
181=1,182=1,183=1,184=1,185=1,186=1,187=1,188=1,189=1,190=1,
191=1,192=1,193=1,194=1,195=1,196=1,197=1,198=1,199=1,200=1,
201=1,202=1,203=1,204=1,205=1,206=1,207=1,208=1,209=1,210=1,
211=1,212=1,213=1,214=1,215=1,216=1,217=1,218=1,219=1,220=1,
221=1,222=1,223=1,224=1,225=1,226=1,227=1,228=1,229=1,230=1,
231=1,232=1,233=1,234=1,235=1,236=1,237=1,238=1,239=1,240=1,
241=1,242=1,243=1,244=1,245=1,246=1,247=1,248=1,249=1,250=1,
251=1,252=1,253=1,254=1,255=1,256=1,257=1,258=1,259=1,260=1,
261=1,262=1,263=1,264=1,265=1,266=1,267=1,268=1,269=1,270=1,
271=1,272=1,273=1,274=1,275=1,276=1,277=1,278=1,279=1,280=1,
281=1,282=1,283=1,284=1,285=1,286=1,287=1,288=1,289=1,290=1,
291=1,292=1,293=1,294=1,295=1,296=1,297=1,298=1,299=1,300=1,
301=1,302=1,303=1,304=1,305=1,306=1,307=1,308=1,309=1,310=1,
311=1,312=1,313=1,314=1,315=1,316=1,317=1,318=1,319=1,320=1,
321=1,322=1,323=1,324=1,325=1,326=1,327=1,328=1,329=1,330=1,
331=1,332=1,333=1,334=1,335=1,336=1,337=1,338=1,339=1,340=1,
341=1,342=1,343=1,344=1,345=1,346=1,347=1,348=1,349=1,350=1,
351=1,352=1,353=1,354=1,355=1,356=1,357=1,358=1,359=1,360=1,
361=1,362=1,363=1,364=1,365=1,366=1,367=1,368=1,369=1,370=1,
371=1,372=1,373=1,374=1,375=1,376=1,377=1,378=1,379=1,380=1,
381=1,382=1,383=1,384=1,385=1,386=1,387=1,388=1,389=1,390=1,
391=1,392=1,393=1,394=1,395=1,396=1,397=1,398=1,399=1,400=1,
401=1,402=1,403=1,404=1,405=1,406=1,407=1,408=1,409=1,410=1,
411=1,412=1,413=1,414=1,415=1,416=1,417=1,418=1,419=1,420=1,
421=1,422=1,423=1,424=1,425=1,426=1,427=1,428=1,429=1,430=1,
431=1,432=1,433=1,434=1,435=1,436=1,437=1,438=1,439=1,440=1,
441=1,442=1,443=1,444=1,445=1,446=1,447=1,448=1,449=1,450=1,
451=1,452=1,453=1,454=1,455=1,456=1,457=1,458=1,459=1,460=1,
461=1,462=1,463=1,464=1,465=1,466=1,467=1,468=1,469=1,470=1,
471=1,472=1,473=1,474=1,475=1,476=1,477=1,478=1,479=1,480=1,
481=1,482=1,483=1,484=1,485=1,486=1,487=1,488=1,489=1,490=1,
491=1,492=1,493=1,494=1,495=1,496=1,497=1,498=1,499=1,500=1,
501=1,502=1,503=1,504=1,505=1,506=1,507=1,508=1,509=1,510=1,
511=1,512=1,513=1,514=1,515=1,516=1,517=1,518=1,519=1,520=1,
521=1,522=1,523=1,524=1,525=1,526=1,527=1,528=1,529=1,530=1,
531=1,532=1,533=1,534=1,535=1,536=1,537=1,538=1,539=1,540=1,
541=1,542=1,543=1,544=1,545=1,546=1,547=1,548=1,549=1,550=1,
551=1,552=1,553=1,554=1,555=1,556=1,557=1,558=1,559=1,560=1,
561=1,562=1,563=1,564=1,565=1,566=1,567=1,568=1,569=1,570=1,
571=1,572=1,573=1,574=1,575=1,576=1,577=1,578=1,579=1,580=1,
581=1,582=1,583=1,584=1,585=1,586=1,587=1,588=1,589=1,590=1,
591=1,592=1,593=1,594=1,595=1,596=1,597=1,598=1,599=1,600=1,
601=1,602=1,603=1,604=1,605=1,606=1,607=1,608=1,609=1,610=1,
611=1,612=1,613=1,614=1,615=1,616=1,617=1,618=1,619=1,620=1,
621=1,622=1,623=1,624=1,625=1,626=1,627=1,628=1,629=1,630=1,
631=1,632=1,633=1,634=1,635=1,636=1,637=1,638=1,639=1,640=1,
641=1,642=1,643=1,644=1,645=1,646=1,647=1,648=1,649=1,650=1,
651=1,652=1,653=1,654=1,655=1,656=1,657=1,658=1,659=1,660=1,
661=1,662=1,663=1,664=1,665=1,666=1,667=1,668=1,669=1,670=1,
671=1,672=1,673=1,674=1,675=1,676=1,677=1,678=1,679=1,680=1,
681=1,682=1,683=1,684=1,685=1,686=1,687=1,688=1,689=1,690=1,
691=1,692=1,693=1,694=1,695=1,696=1,697=1,698=1,699=1,700=1,
701=1,702=1,703=1,704=1,705=1,706=1,707=1,708=1,709=1,710=1,
711=1,712=1,713=1,714=1,715=1,716=1,717=1,718=1,719=1,720=1,
721=1,722=1,723=1,724=1,725=1,726=1,727=1,728=1,729=1,730=1,
731=1,732=1,733=1,734=1,735=1,736=1,737=1,738=1,739=1,740=1,
741=1,742=1,743=1,744=1,745=1,746=1,747=1,748=1,749=1,750=1,
751=1,752=1,753=1,754=1,755=1,756=1,757=1,758=1,759=1,760=1,
761=1,762=1,763=1,764=1,765=1,766=1,767=1,768=1,769=1,770=1,
771=1,772=1,773=1,774=1,775=1,776=1,777=1,778=1,779=1,780=1,
781=1,782=1,783=1,784=1,785=1,786=1,787=1,788=1,789=1,790=1,
791=1,792=1,793=1,794=1,795=1,796=1,797=1,798=1,799=1,800=1,
801=1,802=1,803=1,804=1,805=1,806=1,807=1,808=1,809=1,810=1,
811=1,812=1,813=1,814=1,815=1,816=1,817=1,818=1,819=1,820=1,
821=1,822=1,823=1,824=1,825=1,826=1,827=1,828=1,829=1,830=1,
831=1,832=1,833=1,834=1,835=1,836=1,837=1,838=1,839=1,840=1,
841=1,842=1,843=1,844=1,845=1,846=1,847=1,848=1,849=1,850=1,
851=1,852=1,853=1,854=1,855=1,856=1,857=1,858=1,859=1,860=1,
861=1,862=1,863=1,864=1,865=1,866=1,867=1,868=1,869=1,870=1,
871=1,872=1,873=1,874=1,875=1,876=1,877=1,878=1,879=1,880=1,
881=1,882=1,883=1,884=1,885=1,886=1,887=1,888=1,889=1,890=1,
891=1,892=1,893=1,894=1,895=1,896=1,897=1,898=1,899=1,900=1,
901=1,902=1,903=1,904=1,905=1,906=1,907=1,908=1,909=1,910=1,
911=1,912=1,913=1,914=1,915=1,916=1,917=1,918=1,919=1,920=1,
921=1,922=1,923=1,924=1,925=1,926=1,927=1,928=1,929=1,930=1,
931=1,932=1,933=1,934=1,935=1,936=1,937=1,938=1,939=1,940=1,
941=1,942=1,943=1,944=1,945=1,946=1,947=1,948=1,949=1,950=1,
951=1,952=1,953=1,954=1,955=1,956=1,957=1,958=1,959=1,960=1,
961=1,962=1,963=1,964=1,965=1,966=1,967=1,968=1,969=1,970=1,
971=1,972=1,973=1,974=1,975=1,976=1,977=1,978=1,979=1,980=1,
981=1,982=1,983=1,984=1,985=1,986=1,987=1,988=1,989=1,990=1,
991=1,992=1,993=1,994=1,995=1,996=1,997=1,998=1,999=1,1000=1,1001=1
-m /mnt/here -k -y

This will run for a couple of hours. To run such a huge number of containers in “production” you’ll _have_ to alter dfsopen and write your own password generator. You don’t want to manually type in 1000 passwords. You want a clever loop that will autogenerate your passwords for the flaring containers and ask interactively for your real hidden password when processing the 754th container for example. You can now hide 512Kb of data in each of the 1000 containers.

I think it may become handy to have such a program. One that will autogenerate passwords for flaring containers and just ask the manual typing for the real hidden container. I will think about that.

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