There is an increasing count of applications which use Authy for two-factor authentication. However many users who aren't using Authy, have their own authenticator setup up already and do not wish to use two applications for generating passwords.
Since I use 1Password for all of my password storing/generating needs, I was looking for a solution to use Authy passwords on that. I couldn't find any completely working solutions, however I stumbled upon a gist by Brian Hartvigsen. His post had a neat code with it to generate QR codes for you to use on your favorite authenticator.
His method is to extract the secret keys using Authy's Google Chrome app via Developer Tools. If this was not possible, I guess people would be reverse engineering the Android app or something like that. But when I tried that code, nothing appeared on the screen. My guess is that Brian used the code to extract the keys that weren't necessarily tied to Authy.
I had to adapt the code a little and you can see the result below, but here's what I discovered about Authy's method:
- They use the exact same algorithm to generate passwords as Google Authenticator and similar (TOTP)
- The passwords are one digit longer - 7 digits (usually they're 6, with exceptions), but if you've looked at one of the Authy generated passwords already, you probably noticed it too
- The password validity period is 10 seconds (instead of usual 30). Authy shows 20 seconds, but that means a slightly different thing. Don't substitute this period longer in your Authenticator.
- Authy's secret keys are in hex already, so they need to be turned back to base32 for working QR codes
So as long as you have an authenticator which can do longer passwords than 6 characters and do custom time periods, then congratulations, you can use the following method. If you are not sure, scan this code with your authenticator to test. Don't forget to delete it afterwards. The code should have 7 digits and should change every 10 seconds.
Known to work:
- 1Password (for OS X, iOS, Android)
- LastPass
- Bitwarden
- KeepassXC
- Keepass2Android
Might work:
- Google Authenticator
Known not to work:
- 1Password for Windows (doesn't support other digit counts and timeouts yet)
- Authy for iOS (doesn't support other timeouts than 30s, the irony!)
This method has only one gotcha - if you want add a new service that relies on Authy, you will need to run Authy again. I am assuming you know how to use Authy and have some services added already. You can probably get rid of Authy on your phone and log in to Authy on your desktop using SMS.
Important: You can NOT delete your Authy account, even after migrating your TOTP tokens to another software! If you do, you could be locking yourself out of all the accounts that require Authy!
- Install Authy desktop app - The following steps will work on Linux, Mac and Windows.
- Open Authy and log in, so you can see the codes being generated for you
- Restart Authy desktop app, but add the
--remote-debugging-port=5858parameter to the command-line:
- On Windows: right-click the Authy desktop shortcut, and in the Target field write
--remote-debugging-port=5858at the end. Then click OK. Double-click the Authy desktop shortcut. - On Mac: from Terminal.app:
open -a "Authy Desktop" --args --remote-debugging-port=5858 - On Linux, from a terminal:
authy --remote-debugging-port=5858
- Open the following URL in a Chrome (or Chromium-bases) web browser: http://localhost:5858
- Click the
Twilio Authylink in that webpage. - In Chrome Developer Tools top navigation bar, go to
Application(if you don't see it, click>>to expand the full list) Then on the left, click Frames → "⃞top" to display contents. - Then right-click
main.htmland selectOpen in containing folder. That will open a Console where you can paste the following code:
// QRious v4.0.2 | (C) 2017 Alasdair Mercer | GPL v3 License Based on jsqrencode | (C) 2010 [email protected] | GPL v3 License
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t,e,i,n,s=this.buffer,r=this.width;for(t=0;t<3;t++){for(e=0,n=0,1===t&&(e=r-7),2===t&&(n=r-7),s[n+3+r*(e+3)]=1,i=0;i<6;i++)s[n+i+r*e]=1,s[n+r*(e+i+1)]=1,s[n+6+r*(e+i)]=1,s[n+i+1+r*(e+6)]=1;for(i=1;i<5;i++)this._setMask(n+i,e+1),this._setMask(n+1,e+i+1),this._setMask(n+5,e+i),this._setMask(n+i+1,e+5);for(i=2;i<4;i++)s[n+i+r*(e+2)]=1,s[n+2+r*(e+i+1)]=1,s[n+4+r*(e+i)]=1,s[n+i+1+r*(e+4)]=1}},_insertTimingGap:function(){var t,e,i=this.width;for(e=0;e<7;e++)this._setMask(7,e),this._setMask(i-8,e),this._setMask(7,e+i-7);for(t=0;t<8;t++)this._setMask(t,7),this._setMask(t+i-8,7),this._setMask(t,i-8)},_insertTimingRowAndColumn:function(){var t,e=this.buffer,i=this.width;for(t=0;t<i-14;t++)1&t?(this._setMask(8+t,6),this._setMask(6,8+t)):(e[8+t+6*i]=1,e[6+i*(8+t)]=1)},_insertVersion:function(){var t,e,i,n,s=this.buffer,r=this._version,o=this.width;if(r>6)for(t=d.BLOCK[r-7],e=17,i=0;i<6;i++)for(n=0;n<3;n++,e--)1&(e>11?r>>e-12:t>>e)?(s[5-i+o*(2-n+o-11)]=1,s[2-n+o-11+o*(5-i)]=1):(this._setMask(5-i,2-n+o-11),this._setMask(2-n+o-11,5-i))},_isMasked:function(t,e){var i=v._getMaskBit(t,e);return 1===this._mask[i]},_pack:function(){var t,e,i,n=1,s=1,r=this.width,o=r-1,a=r-1,h=(this._dataBlock+this._eccBlock)*(this._neccBlock1+this._neccBlock2)+this._neccBlock2;for(e=0;e<h;e++)for(t=this._stringBuffer[e],i=0;i<8;i++,t<<=1){128&t&&(this.buffer[o+r*a]=1);do{s?o--:(o++,n?0!==a?a--:(n=!n,6===(o-=2)&&(o--,a=9)):a!==r-1?a++:(n=!n,6===(o-=2)&&(o--,a-=8))),s=!s}while(this._isMasked(o,a))}},_reverseMask:function(){var t,e,i=this.width;for(t=0;t<9;t++)this._setMask(t,8);for(t=0;t<8;t++)this._setMask(t+i-8,8),this._setMask(8,t);for(e=0;e<7;e++)this._setMask(8,e+i-7)},_setMask:function(t,e){var i=v._getMaskBit(t,e);this._mask[i]=1},_syncMask:function(){var 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// Based on https://github.com/LinusU/base32-encode/blob/master/index.js
function hex_to_b32(hex) { let alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"; let bytes = []; for (let i = 0; i < hex.length; i += 2) { bytes.push(parseInt(hex.substr(i, 2), 16)); } let bits = 0; let value = 0; let output = ''; for (let i = 0; i < bytes.length; i++) { value = (value << 8) | bytes[i]; bits += 8; while (bits >= 5) { output += alphabet[(value >>> (bits - 5)) & 31]; bits -= 5; } } if (bits > 0) { output += alphabet[(value << (5 - bits)) & 31]; } return output; }
// Based on https://github.com/adriancooney/console.image
function console_image(url, size) { console.log("%c+", "font-size: 1px; padding: " + Math.floor(size / 2) + "px " + Math.floor(size / 2) + "px; line-height: " + size + "px; background: url(" + url + "); color: transparent;"); }
(function(console) { console.save = function(data, filename) { if (!data) { console.error('Console.save: No data'); return; } if (typeof data === "object") { data = JSON.stringify(data, undefined, 4) } var blob = new Blob([data], {type: 'text/json'}), e = document.createEvent('MouseEvents'), a = document.createElement('a'); a.download = filename; a.href = window.URL.createObjectURL(blob); a.dataset.downloadurl = ['text/json', a.download, a.href].join(':'); e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); a.dispatchEvent(e); } })(console);
console.warn("Here's your Authy tokens:");
var data = appManager.getModel().map(function(i) {
var secret = (i.markedForDeletion === false ? i.decryptedSeed : hex_to_b32(i.secretSeed));
var period = (i.digits === 7 ? 10 : 30);
var totp_uri = `otpauth://totp/${encodeURIComponent(i.name)}?secret=${secret}&digits=${i.digits}&period=${period}`;
console.group(i.name); console.log('TOTP secret:', secret); console.log('TOTP URI:', totp_uri); var qr_size = 250; var url = (new QRious({value: totp_uri, size: qr_size})).toDataURL(); console_image(url, qr_size); console.groupEnd();
return {name: i.name, secret: secret, uri: totp_uri};
});
//console.save(data, 'authy_backup.json');
- If you want to export your Authy tokens in JSON format, simply un-comment the last line in the code above. The Authy Desktop window will prompt for where to save the
authy_backup.json. file. - All your Authy tokens will be displayed in the Console; either copy-paste the TOTP URI, or scan the QR codes.
- Brian's gist
- JavaScript implementation of base32 encoding by Chris Umbel, et al.
- Google Authenticator URI format
- I am not responsible for your actions.
- I am sure someone has already discovered everything I wrote before, but I couldn't find anything written about it in detail, I didn't invent anything new here
- The code is a horrible hack, it works for what it does and that's the important bit, improvements are welcome
- If anyone from Authy reads this - security shouldn't rely on obfuscation or hiding of any sort and should take advantage of freedom of choice where possible. I love the idea of the keys being tied to ones phone number and making this system easy to use for everyone, but please make these URI-s exportable to other applications if users wish to do so - it's possible as demonstrated above and you probably know it. Transparency is what makes this system secure. If you don't wish to do that, then please don't break this method of acquiring keys.