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netcarver

2-factor authentication module

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I've been working on an experimental module set that adds 2-factor authentication to ProcessWire with the help of Steve Gibson's PPP one-time-pad system.

This is split into two modules; a CryptoPPP library that implements the otp system and a 2-factor authentication module that uses it to add 2-factor authentication to ProcessWire.

The 2-factor module adds an additional "Login Token" field to the login page into which the authenticating user will need to enter the next unused token from their one-time-pad. Pages from their pad can either be printed out in advance in a credit-card sized format (with codes being crossed out as they are used as shown here) or the required token can be sent to their registered email address so they don't need to print anything out. This second option requires a good email address be present in the user's account in order for them to be sent the token.

Email Delivery

To set up email delivery go to the 2-factor module's config page and choose "token delivery via email" and save the settings. Next, make sure that every user who will use the system has a valid email address set up in their account. Upon the first failed user login attempt, the required token will be emailed to the user’s email address and they should then be able to log in.

Printing Pages From The Pad

If you prefer to print the tokens in a handy credit-card sized format then…

  • Go to your profile screen
  • Expand the “PPP Initialisation Vector” field
  • Hit the “Show Token Cards” button to open a new browser window with the next 3 useful cards
  • Use your browser’s print option to print these out
  • Trim them to size and store

...but make sure you print these out before you enable 2-factor authentication on your account. If you cross out your used codes, you will always know which code to use when logging back in -- and if you forget, the first login attempt will fail and the token field will then prompt you with the location of the correct code to use.

Why would I ever want to use 2-factor authentication?

If your site is only for you or for people you know use good passwords then you probably never will need a 2-factor authentication system. But it has been shown that many users use passwords that are, well, rubbish not very good and having a second factor can be useful in mitigating poor passwords. As the second factor in this system comes out of a one-time-pad system (meaning it will not be reused) then having the user's password leaked or guessed should not compromise their account nor will having someone spy out the token they are using to log-in as tokens are not re-used (well, not for a very long time.)

Known Problems

  • You need to hit the save button after you install the 2-factor module to get it to remember the initial settings. (I guess I'm not setting the defaults correctly at present but pressing the button will allow you to move forward for now)
  • Uninstall of the 2-factor module leads to a lot of warnings.

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Thanks to Soma for helping me with module questions via the #processwire IRC channel.

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This is really awesome Steve, and a great idea. Just tested out here and it works great! Thanks for your work with this module, it looks really well put together.

One question: why is CryptoPPP.module kept separate? Just wondering if this might be simpler for people to install if they could just download 1 zip (or 1 clone) and have everything needed in 1 directory. You could add CryptoPPP to your getModuleInfo 'installs' line, and have it install and/or uninstall automatically with Auth2FactorPPP (ProcessWire will do this for you have you use that 'installs' property). Though if you are planning to make other modules that use CryptoPPP, then I suppose it makes sense to keep them separate. But just wanted to check.

I would love to see this in the modules directory if you have time to add it: http://modules.processwire.com/add/ … thanks again for the great work you've done with these modules!

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This is really awesome Steve, and a great idea. Just tested out here and it works great!

That's good to know Ryan, thanks for testing it.

One question: why is CryptoPPP.module kept separate? Just wondering if this might be simpler for people to install if they could just download 1 zip (or 1 clone) and have everything needed in 1 directory. You could add CryptoPPP to your getModuleInfo 'installs' line, and have it install and/or uninstall automatically with Auth2FactorPPP (ProcessWire will do this for you have you use that 'installs' property). Though if you are planning to make other modules that use CryptoPPP, then I suppose it makes sense to keep them separate. But just wanted to check.

I wasn't aware of the installs property, must have missed that from my reading of the wiki.

I separated it in case anyone else wanted to develop modules that use the PPP one-time-pad system (though I don't have any further plans to right now) and also because the code in CryptoPPP is mainly comprised of parts of existing PHP implementations of the PPP system and I wanted to able to credit those folks in the module's information. My contributions are mainly within the 2-factor authentication module.

I would love to see this in the modules directory if you have time to add it: http://modules.processwire.com/add/ … thanks again for the great work you've done with these modules!

I plan on doing that once there has been some additional testing and I've worked out the two problems I have with it at present (see the Known Problems part of the opening post.)

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Hello, can anybody help me work out why this module's uninstall code doesn't seem to work cleanly?

I define an array of fields that the module creates and then adds into the user template on install. However, when reversing this in the uninstall() method I get multiple errors.

I must have missed something; the uninstall seems to be doing the reverse of the install routine (to me) yet I get multiple errors saying "Unable to delete from 'field_ppp_login_enable' for field that doesn't exist in fields table" even though that field only undergoes a single delete() call -- and, unless removing() it from the template's fieldgroup also deletes it -- it should exist at the point delete() is called.

Ideas?

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I think I understand what's going on, though haven't stepped through the live code yet. But it looks to me like there's potentially an issue in PW's Fieldgroups::save function where it doesn't like to be called multiple times. It queues fields for removal and doesn't do the actual remove until you call Fieldgroup::save. That's what it should do. But as far as I can tell, Fieldgroups::save doesn't clear out the removal queue after it completes the save, meaning it may try to remove something that's already been removed if you are making multiple calls to it. Assuming I'm right about that, it's an easy fix to the core (and already made it locally), but for compatibility with current versions, try making this change:

after your $t->fieldgroup->save(); in uninstallField add this line:

$t->fieldgroup->removedFields->remove("name=$name"); 

does that fix it?

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I get the same errors with the additional line. For now I will try delaying the call to save() on the templates till all the fields are removed and see what I get.

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Ok, delaying calling save() on the fieldgroups until all fields have been removed works. Thanks for the tip Ryan.

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Steve, this is a way cool Module, thanks so much :D

I am (once again (no surprises here)) a total newb at PPP so I wonder if I might ask you a quick question? I would like to

To create tokens with a format such as ‘X7gM-jA9v-KtWs’

as you say in github. Using this code

$key = CryptoPPP::genKeys();
$key = CryptoPPP::keyToTokenBlocks($key);

I am getting this sort of output

mEq:-U#nJ

What do I need to do to adjust the number of characters and also to ensure I get codes like the example you have (ones that will be safe to use as GET variables such as X7gM-jA9v-KtWs)?

Thanks very much in advance for any comments.

PS: I have no clue how I am going to do it (yet) but I am hoping to use this as part of a verification process so when someone makes a booking, they are sent an email with a link back to example.com/check-the-email/X7gM-jA9v-KtWs and if the X7gM-jA9v-KtWs is found then we know they got the code in the first place so we are happy and can continue. I think I know the steps I want but not done the code yet; exciting!

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Hi Alan,

Try something like this...

$key = CryptoPPP::genKeys();
$key = CryptoPPP::keyToTokenBlocks($key, 4, 3, '-', CryptoPPP::DISTINCT_CHARSET);

That's off the top of my head and untested. You should get three blocks of four chars from the "Distinct charset" (which should be safe as a GET variable) with a dash between the blocks.

You can check the parameters of keyToTokenBlocks here, and here are the characters from the "distinct charset".

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Thanks Steve and sorry I missed the inline doc there (doh...). Cheers, -Alan

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Hey Alan,

No probs re the docs.

Something you might want to consider: Reducing the number of characters in the output character set (by using the distinct charset) does reduce the strength of the generated token somewhat so you may want to consider increasing the length of your generated tokens to compensate for this -- maybe by using 4 runs of 4 chars.

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Thanks for the tip Steve, yeah I'd already gone off like fox in a chicken coop and so far was playing with 6 6 (it's addictive just seeing those lovely long random strings) :D Doing something else right now but really looking forward to coming back to this and tackling implementing it for real.

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Hi Steve/chums,

Sorry to type-n-go but late and wanted to ask this quickly in case it's easy (hoping ;))

I have just put a site up that was running aok here on MAMP and have hit a PHP dependency (I think) that it looks like my host does not (yet) provide but MAMP does.

When I go to a page that uses this brilliant crypto module locally, all AOK, on the host I get:

Fatal error: Call to undefined function bcmul() in /var/www/.../site/modules/CryptoPPP/CryptoPPP.module on line 78
This error message was shown because site is in debug mode ($config->debug = true; in /site/config.php). Error has been logged.

I did a phpinfo to see if bcmul is something I can turn on in php.ini but seems not.

This seems to suggest a solution.

Any pointers as how to best solve this? Thank you VERY much indeed for any help! Cheers, -Alan

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Hi Alan,

Really busy here at the moment so sorry for the brief reply but, yes, the "bc" maths functions are needed for the PPP library. I thought I had the modules check for availability of those functions when it was installed (will check later) did you clone your site to your host (in which case modules will not execute the prerequisite function availability check) or did you try installing the modules directly on the host?

Edited by netcarver
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Hi Steve,

Really busy here at the moment so sorry for the brief reply

NO problem! I don't have a SLA with you :)

did you clone your site to your host (modules will not execute prerequisite code) or did you try installing the modules directly on the host?

I did clone. I will try to uninstall and reinstall and post back (but if I understand this right it won't help, but will do anyway just in case).

Thanks VERY much for replying at all when you are busy and no expectations here for any speed of next reply, thanks again! Cheers, -Alan

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Hi Steve,

Uninstall and re-install does helpfully say

Unable to install module 'CryptoPPP': bcadd not available

so I will go talk to my hoster to see if I can have this added. I am guessing they will say my PHP build is locked down and I can't (bless).

Assuming I can't, as/when you are able, do you know off hand if that idea/alt code in that link might help me? Tots understand if you have no time to answer. Cheers, -Alan

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Update: to get me out of a hole I am using an alternative solution; so no worries. All I was using CryptoPPP for was to get a lovely one-time random string (so I was not using it to do much) and my solution was the following, I needed it to provide a degree of unpredictable-ness so humans could not guess it and I needed to ensure it was unique, hence the use of a rand fn + date stamp:

// Based on http://stackoverflow.com/a/4356295/236306 plus a mod of mine, namely I tack the output of time() on the end, see inline comment below
function crypto($length = 6) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, strlen($characters) - 1)];
    }
    // Right up until here the code is not mine, the line below is edited by me to tack a unix timestamp on the end
    return $randomString . time();
}

This returns this sort of thing each time it's run, if for example you run it once per second (which I don't):

EoiMrQ1379520972

7p4b4r1379520973

8GyhxU1379520974

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Just pushed some updates to this ancient module. The new version (v1.2.0) uses wireMail and should work with PW 3.

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any updates for php 7.2+ users ?

mcrypt is no longer supported in new versions of PHP (since 7.2) so this module cannot work due to the mcrypt dependency

http://php.net/manual/en/migration71.deprecated.php

mcrypt has been replaced with OpenSSL

I am trying to use the URL shortener module but it requires this module to work

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@neosin

Sorry for the slow response to this, but I just updated both the 2-Factor authentication module (for PW3+) and the CryptoPPP library module (switched it to OpenSSL.) If you still want to, try grabbing the latest version 3.1.1 and that should work under PHP 7.2.

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      default is 'center' param: $padding - (integer) 0 - 25, default is 5, padding to the borders in percent of the images length! return: pim - (class handle) You can pass a transparent image with its filename or as a PageImage to the method. If the watermark is bigger than the destination-image, it gets shrinked to fit into the targetimage. If it is a small watermark image you can define the position of it:
      NW - N - NE | | | W - C - E | | | SW - S - SE  
      The easiest and best way I have discovered to apply a big transparency watermark to an image is as follows:
      create a square transparent png image of e.g. 2000 x 2000 px, place your mark into the center with enough (percent) of space to the borders. You can see an example here! The $pngAlphaImage get centered and shrinked to fit into the memory image. No hassle with what width and / or height should I use?, how many space for the borders?, etc.
      -------------------------------------------------------------------

      * watermarkLogoTiled

      watermarkLogoTiled($pngAlphaImage)
      param: $pngAlphaImage - mixed [systemfilepath or PageImageObject] to/from a PNG with transparency return: pim - (class handle) Here you have to pass a tile png with transparency (e.g. something between 150-300 px?) to your bigger images. It got repeated all over the memory image starting at the top left corner.
      -------------------------------------------------------------------

      * watermarkText

      watermarkText($text, $size=10, $position='center', $padding=2, $opacity=50, $trueTypeFont=null)
      param: $text - (string) the text that you want to display on the image param: $size - (integer) 1 - 100, unit = points, good value seems to be around 10 to 15 param: $position - (string) is one out of: N, E, S, W, C, NE, SE, SW, NW,
      - or: north, east, south, west, center, northeast, southeast, southwest, northwest
      default is 'center' param: $padding - (integer) 0 - 25, default is 2, padding to the borders in percent of the images length! param: $opacity- (integer) 1 - 100, default is 50 param: $trueTypeFont - (string) systemfilepath to a TrueTypeFont, default is freesansbold.ttf (is GPL & comes with the module) return: pim - (class handle) Here you can display (dynamic) text with transparency over the memory image. You have to define your text, and optionally size, position, padding, opacity for it. And if you don't like the default font, freesansbold, you have to point to a TrueTypeFont-File of your choice.
      Please have a look to example output: http://processwire.com/talk/topic/4264-release-page-image-manipulator/page-2#entry41989
      -------------------------------------------------------------------





      PageImage Manipulator - Example Output


    • By d'Hinnisdaël
      Format Datetime fields as Carbon instances.
      You can find the latest release and the complete readme on Github.
      Installation
      composer require daun/datetime-carbon-format Usage
      All Datetime fields will now be formatted as Carbon instances instead of strings. Some examples:
      // $page->date is a Datetime field // Output format: j/n/Y echo $page->date; // 20/10/2020 echo $page->date->add('7 days'); // 27/10/2020 echo $page->date->format('l, F j'); // Monday, October 20 echo $page->date->year; // 2020 echo $page->date->diffForHumans(); // 28 minutes ago Frontend only
      The ProcessWire admin seems to expect datetime fields to be strings. This module will only return Carbon instances on frontend page views.
      Date output format
      When casting a Carbon instance to a string (usually when outputting the field in a template), the field's date output format will be respected.
      Links
      GitHub • Readme • Carbon docs
       
       
      PS. I remember reading about a Carbon module in a recent newsletter, but couldn't find it anywhere. Was that you, @bernhard?
    • By MoritzLost
      TrelloWire
      This is a module that allows you to automatically create Trello cards for ProcessWire pages and update them when the pages are updated. This allows you to setup connected workflows. Card properties and change handling behaviour can be customized through the extensive module configuration. Every action the module performs is hookable, so you can modify when and how cards are created as much as you need to. The module also contains an API-component that makes it easy to make requests to the Trello API and build your own connected ProcessWire-Trello workflows.
      Warning: This module requires ProcessWire 3.0.167 which is above the current stable master release at the moment.
      Features
      All the things the module can do for you without any custom code: Create a new card on Trello whenever a page is added or published (you can select applicable templates). Configure the target board, target list, name and description for new cards. Add default labels and checklists to the card. Update the card whenever the page is updated (optional). When the status of the card changes (published / unpublished, hidden / unhidden, trashed / restored or deleted), move the card to a different list or archive or delete it (configurable). You can extend this through hooks in many ways: Modifiy when and how cards are created. Modify the card properties (Target board & list, title, description, et c.) before they are sent to Trello. Create your own workflows by utilizing an API helper class with many convenient utility methods to access the Trello API directly. Feedback & Future Plans
      Let me know what you think! In particular:
      If you find any bugs report them here or on Github, I'll try to fix them. This module was born out of a use-case for a client project where we manage new form submissions through Trello. I'm not sure how many use-cases there are for this module. If you do use it, tell me about it! The Trello API is pretty extensive, I'll try to add some more helper methods to the TrelloWireApi class (let me know if you need anything in particular). I'll think about how the module can support different workflows that include Twig – talk to me if you have a use-case! Next steps could be a dashboard to manage pages that are connected to a Trello card, or a new section in the settings tab to manage the Trello connection. But it depends on whether there is any interest in this 🙂 Links
      Repository on Github Complete module documentation (getting started, configuration & API documentation) TrelloWire in the modules directory Module configuration

    • By David Karich
      ProcessWire InputfieldRepeaterMatrixDuplicate
      Thanks to the great ProModule "RepeaterMatrix" I have the possibility to create complex repeater items. With it I have created a quite powerful page builder. Many different content modules, with many more possible design options. The RepeaterMatrix module supports the cloning of items, but only within the same page. Now I often have the case that very design-intensive pages and items are created. If you want to use a content module on a different page (e.g. in the same design), you have to rebuild each item manually every time.
      This module extends the commercial ProModule "RepeaterMatrix" by the function to duplicate repeater items from one page to another page. The condition is that the target field is the same matrix field from which the item is duplicated. This module is currently understood as proof of concept. There are a few limitations that need to be considered. The intention of the module is that this functionality is integrated into the core of RepeaterMatrix and does not require an extra module.
      Check out the screencast
      What the module can do
      Duplicate multible repeater items from one page to another No matter how complex the item is Full support for file and image fields Multilingual support Support of Min and Max settings Live synchronization of clipboard between multiple browser tabs. Copy an item and simply switch the browser tab to the target page and you will immediately see the past button Support of multiple RepeaterMatrix fields on one page Configurable which roles and fields are excluded Configurable dialogs for copy and paste Duplicated items are automatically pasted to the end of the target field and set to hidden status so that changes are not directly published Automatic clipboard update when other items are picked Automatically removes old clipboard data if it is not pasted within 6 hours Delete clipboard itself by clicking the selected item again Benefit: unbelievably fast workflow and content replication What the module can't do
      Before an item can be duplicated in its current version, the source page must be saved. This means that if you make changes to an item and copy this, the old saved state will be duplicated Dynamic loading is currently not possible. Means no AJAX. When pasting, the target page is saved completely No support for nested repeater items. Currently only first level items can be duplicated. Means a repeater field in a repeater field cannot be duplicated. Workaround: simply duplicate the parent item Dynamic reloading and adding of repeater items cannot be registered. Several interfaces and events from the core are missing. The initialization occurs only once after the page load event Attention, please note!
      Nested repeaters cannot be supported technically. Therefore a check is made to prevent this. However, a nested repeater can only be detected if the field name ends for example with "_repeater1234". For example, if your MatrixRepeater field is named like this: "content_repeater" or "content_repeater123", this field is identified as nested and the module does not load. In version 2.0.1 the identification has been changed so that a field ending with the name repeater is only detected as nested if at least a two-digit number sequence follows. But to avoid this problem completely, make sure that your repeater matrix field does NOT end with the name "repeater".
      Changelog
       
      2.0.1
      Bug fix: Thanks to @ngrmm I could discover a bug which causes that the module cannot be loaded if the MatrixRepeater field ends with the name "repeater". The code was adjusted and information about the problem was provided 2.0.0
      Feature: Copy multiple items at once! The fundament for copying multiple items was created by @Autofahrn - THX! Feature: Optionally you can disable the copy and/or paste dialog Bug fix: A fix suggestion when additional and normal repeater fields are present was contributed by @joshua - THX! 1.0.4
      Bug fix: Various bug fixes and improvements in live synchronization Bug fix: Items are no longer inserted when the normal save button is clicked. Only when the past button is explicitly clicked Feature: Support of multiple repeater fields in one page Feature: Support of repeater Min/Max settings Feature: Configurable roles and fields Enhancement: Improved clipboard management Enhancement: Documentation improvement Enhancement: Corrected few typos #1 1.0.3
      Feature: Live synchronization Enhancement: Load the module only in the backend Enhancement: Documentation improvement 1.0.2
      Bug fix: Various bug fixes and improvements in JS functions Enhancement: Documentation improvement Enhancement: Corrected few typos 1.0.1
      Bug fix: Various bug fixes and improvements in the duplication process 1.0.0
      Initial release Support this module
      If this module is useful for you, I am very thankful for your small donation: Donate 5,- Euro (via PayPal – or an amount of your choice. Thank you!)
      Download this module (Version 2.0.1)
      > Github: https://github.com/FlipZoomMedia/InputfieldRepeaterMatrixDuplicate
      > PW module directory: https://modules.processwire.com/modules/inputfield-repeater-matrix-duplicate/
      > Old stable version (1.0.4): https://github.com/FlipZoomMedia/InputfieldRepeaterMatrixDuplicate/releases/tag/1.0.4
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