February 2015 - Pharo-dev - lists.pharo.org

Recommendation for password encryption?
by Mariano Martinez Peck Sept. 30, 2022

Sept. 30, 2022

Hi guys. Some time ago I asked about the best way to encrypt a password. Some of the recommendations I got was: 1) Generally for passwords you do not write a decrypt method for security purposes (eg you do not want people to be able to reverse engineer the encrypted password easily) 2) put a little salt 3) There is http://www.squeaksource.com/Cryptography/PasswordHashingFFI 4) I should not decrypt password but instead I should compare both encrypted versions to see if they are equal. My scenario is the following. I need to store database passwords in text files. So I don't want to let them as plain text. And while I understand 4), I think it's a different scenario than mine. I know that some database driver may allow you to directly send the encrypted password. But still...I have another similar scenario in which I have to store a password and then send it (unencrypted)...so I kind of really need a bi-directional encryption. Now..I would try to avoid having an external library + FFI. Any ideas what is the best thing I can do? And how could I solve 1) if I want bidirectional like in my case? Thanks in advance, -- Mariano http://marianopeck.wordpress.com

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Re: [Pharo-project] Parsing and navigating Html
by Paul DeBruicker July 16, 2020

July 16, 2020

On 12/05/2010 06:02 AM, pharo-project-request(a)lists.gforge.inria.fr wrote: > From: St?phane Ducasse<stephane.ducasse(a)inria.fr> > Subject: [Pharo-project] Parsing and navigating Html > To:"Pharo-project(a)lists.gforge.inria.fr Development" > <Pharo-project(a)lists.gforge.inria.fr> > Message-ID:<1C53DFD8-3021-4233-BC83-CE8C1EA8D103(a)inria.fr> > Content-Type: text/plain; charset=us-ascii > > Hi > > I would like extract partial information from HTML pages. > So I started to play and fix HTMLParser. > > Now does anybody know alternatives? > > Second, does anybody develop a lib to query HTML structure as with the XMLSupport package? > > Stef The Soup package on SqueakSource.com works OK.

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[Pharo-project] About ~= and ~~
by Clara Allende Nov. 26, 2016

Nov. 26, 2016

Hi guys, I'm wondering, why? ProtoObject>> ~~ anObject "Answer whether the receiver and the argument are not the same object (do not have the same object pointer)." self == anObject ifTrue: [^ false] ifFalse: [^ true] Instead of: ProtoObject>> ~~ anObject "Answer whether the receiver and the argument are not the same object (do not have the same object pointer)." ^(self == anObject) not And why? Object >> ~= anObject "Answer whether the receiver and the argument do not represent the same object." ^self = anObject == false Instead of Object>> ~= anObject "Answer whether the receiver and the argument do not represent the same object." ^(self = anObject) not. Is there any particular reason for this that I'm missing? Thanks in advance! -- "*Most good programmers do programming not because they expect to get paid or get adulation by the public, but because it is fun to program.*" Linus Torvalds

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Reacting to multi-selection changes in ListModel
by Yuriy Tymchuk Nov. 16, 2016

Nov. 16, 2016

Hi, maybe someone can help me out with this. Iâm working with ListModel that supports multiple selection and has autoDeselect turned off. Now Iâve tried to use #whenSelectionChanged: but it doesnât give any data, #whenMultiSelectionChanged: is not triggered at all, #whenSelectedItemChanged: works as for single selection list. Iâd be very thankful for any help. Uko

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[Pharo-project] Status of SmallPOS
by Stephan Eggermont Aug. 9, 2016

Aug. 9, 2016

I noticed the SmallPOS on ss3 is under MIT license. AFAIK, it was GPLv3. When did this relicensing happen? Stephan

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Smalltalk Hub on Chrome
by Sean P. DeNigris June 28, 2016

June 28, 2016

I noticed sometimes sthub hangs forever on Chrome (Version 34.0.1847.116 on Mavericks), but if I open it alongside in Safari, it loads fine... ----- Cheers, Sean -- View this message in context: http://forum.world.st/Smalltalk-Hub-on-Chrome-tp4755788.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

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[Pharo-project] [ANN] Pomodoro for Pharo 2.0
by Torsten Bergmann Feb. 5, 2016

Feb. 5, 2016

Hi, I followed the recent discussion and initial code about "Pomodoro" and since (until now) I used a timer written in Java I thought it would be a good idea to replace it with a Smalltalk one ;) I grabbed the HOPomodoro code from Phil and since it was marked as "experiment" I thought it would be good to write a new clean implementation with tests for Pharo 2.0. Thanks Phil - hope you are not angry that I hijacked the idea ... Attached is a screenshot of the tool. Install ======= Go to the Config browser in Pharo 2.0 ("Tools" -> "Config Browser") and load "Pomodoro" from the "Verified" tab. A new timer should appear and you can just click on "Start" to run the timer. When it finished it turns red, beeps and informs the user. How to use ========== You can open a new pomodoro (defaults 25 minutes) from the world menu ("Tools" -> "Pomodoro"). Customize ========= You can customize the pomodoro using Smalltalk. Here are a few examples: "open a new 25 minute one" Pomodoro new open "Opens a new timer with one minute total time" Pomodoro timerFor: 1 minute "Provide an action when pomodoro is finished" Pomodoro timerFor: 5 seconds whenFinishedDo: [ self inform: 'Pomodoro finished'] Code ==== The project comes with 15 tests. Code lives on project "Pomodoro" on SmalltalkHub. So far I added Phil and Sean as contributors since they discussed this topic already and may provide new ideas. If one wants to contribute feel free to do so. Thanks T.

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Repeatable VM crash
by Hilaire Jan. 5, 2016

Jan. 5, 2016

When playing with equality in a class hierarchy I have repeatable VM crash. It is today Pharo VM 3.9-7 from Jenkins and Pharo3. Am I using an out of date VM? Crashdump enclosed Hilaire -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

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[Pharo-project] Do we have the new primitive?? [WAS] Re: IdentitySet but using #hash rather than #identityHash ?
by Mariano Martinez Peck Dec. 16, 2015

Dec. 16, 2015

> All I can say is that I am impressed by the numbers it is really much >> faster. >> I still don't understand why I send this email with a subject say >> IdentitySet because what I really need is a fast/large IdentityDictionary >> :( Anyway, there's a place where we can use this LargeIdentitySet in Fuel >> I think). >> >> So Levente, you say this is not possible to adapt this for dictionary? >> can >> we contact Eliot to provide such a primitive? >> > > As promised, I uploaded my LargeIdentityDictionary implementation to > http://leves.web.elte.hu/**squeak/**LargeIdentityDictionary.st<http://leves.web.elte.hu/squeak/LargeIdentityDictionary.st>. > The numbers will be a bit worse compared to LargeIdentitySet, because of > the lack of the primitive, but it's still 2-3x faster than other solutions > (IdentityDictionary, PluggableIdentityDictionary, subclassing, etc). I'm > about to propose this primitive with other improvements on the vm-dev list. > > Hi Eliot/Levente. What is the status of this? Do we have already the new primitive? If true, how can we adapt LargeIdentitySet to use such new primitive? Thanks! > > Levente > > >> thanks >> >> On Fri, Dec 16, 2011 at 3:28 PM, Levente Uzonyi <leves(a)elte.hu> wrote: >> >> On Fri, 16 Dec 2011, Henrik Sperre Johansen wrote: >>> >>> On 16.12.2011 03:26, Levente Uzonyi wrote: >>> >>>> >>>> >>>>> How about my numbers? :) >>>>> >>>>> "Preallocate objects, so we won't count gc time." >>>>> n := 1000000. >>>>> objects := Array new: n streamContents: [ :stream | >>>>> n timesRepeat: [ stream nextPut: Object new ] ]. >>>>> >>>>> set := IdentitySet new: n. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "4949" >>>>> >>>>> set := LargeIdentitySet new. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "331" >>>>> >>>>> set := (PluggableSet new: n) >>>>> hashBlock: [ :object | object identityHash * 4096 + object class >>>>> identityHash * 64 ]; "Change this to #basicIdentityHash in Pharo" >>>>> equalBlock: [ :a :b | a == b ]; >>>>> yourself. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "5511" >>>>> >>>>> >>>>> I also have a LargeIdentityDictionary, which is relatively fast, but >>>>> not >>>>> as fast as LargeIdentitySet, because (for some unknown reason) we don't >>>>> have a primitive that could support it. If we had a primitive like >>>>> primitive 132 which would return the index of the element if found or >>>>> 0 if >>>>> not, then we could have a really fast LargeIdentityDictionary. >>>>> >>>>> >>>>> Levente >>>>> >>>>> Hehe yes, if writing a version fully exploiting the limited range, >>>> that's >>>> probably the approach I would go for as well. >>>> (IAssuming it's the version at http://leves.web.elte.hu/** >>>> squeak/LargeIdentitySet.st<htt**p://leves.web.elte.hu/squeak/** >>>> LargeIdentitySet.st<http://leves.web.elte.hu/squeak/LargeIdentitySet.st> >>>> > >>>> ) >>>> >>>> Mariano commented in the version at http://www.squeaksource.com/** >>>> FuelExperiments <http://www.squeaksource.com/**FuelExperiments<http://www.squeaksource.com/FuelExperiments>> >>>> that it's >>>> >>>> slow for them, which I guess is due to not adopting #identityHash calls >>>> to >>>> #basicIdentityHash calls for Pharo: >>>> ((0 to: 4095) collect: [:each | each << 22 \\ 4096 ]) asSet size -> 1 >>>> So it basically uses 1 bucket instead of 4096... Whoops. :) >>>> >>>> Uploaded a new version to the MC repository which is adapted for Pharo, >>>> on the same machine my numbers were taken from, it does the same test >>>> as I >>>> used above in 871 ms. (181 with preallocation). >>>> >>>> >>> Cool. One more thing: in Squeak the method using primitive 132 directly >>> was renamed to #instVarsInclude:, so now #pointsTo: works as expected. If >>> this was also added to Pharo, then the #pointsTo: sends should be changed >>> to #instVarsInclude:, otherwise Array can be reported as included even if >>> it wasn't added. >>> I'll upload my LargeIdentityDictionary implementation to the same place >>> this evening, since it's still 2-3 factor faster than other solutionts >>> and >>> there seem to be demand for it. >>> >>> >>> Levente >>> >>> >>> Cheers, >>>> Henry >>>> >>>> >>>> >>>> >>> >> >> -- >> Mariano >> http://marianopeck.wordpress.**com <http://marianopeck.wordpress.com> >> >> > -- Mariano http://marianopeck.wordpress.com

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[Pharo-project] StandardFileStream size limit?
by GÃ¶ran Krampe Nov. 13, 2015

Nov. 13, 2015

Hey all! I have just added large file (chunkwise upload and download) support to Kom/Networking/Iliad in Pharo 1.4 and while testing it I tried uploading a 2.9Gb file. I haven't looked at the exact error message, and I haven't tried writing a trivial test - but the "half written" file on disk is almost EXACTLY 2Gb (2147483647) so I am wondering - do we still have a 2Gb file size limit? This is "one click 1.4" on Ubuntu 64 with ext4. regards, GÃ¶ran

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