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[Security](/categories/security) 4. / 5. protonlabs/u2flib-server AbandonedLibrary[Security](/categories/security) protonlabs/u2flib-server ======================== Library for U2F implementation 1.1.0(7y ago)215.7kBSD-2-ClausePHPPHP >=5.6 Since Oct 16Pushed 7y ago16 watchersCompare [ Source](https://github.com/ProtonMail/php-u2flib-server)[ Packagist](https://packagist.org/packages/protonlabs/u2flib-server)[ Docs](https://developers.yubico.com/php-u2flib-server)[ RSS](/packages/protonlabs-u2flib-server/feed)WikiDiscussions master Synced yesterday READMEChangelog (1)Dependencies (3)Versions (11)Used By (0) php-u2flib-server ----------------- [](#php-u2flib-server) [![Build Status](https://camo.githubusercontent.com/f0e1c6adec356cf3559ff431fd7439c2d8dc69347f1840e1905b30744ac8b0c5/68747470733a2f2f7472617669732d63692e636f6d2f50726f746f6e4d61696c2f7068702d7532666c69622d7365727665722e7376673f6272616e63683d6d6173746572)](https://travis-ci.com/ProtonMail/php-u2flib-server)[![codecov](https://camo.githubusercontent.com/b8604c363a91cfee62be2c953bcd2a46acaeb51d21bc2b80ba9470680eabcd45/68747470733a2f2f636f6465636f762e696f2f67682f50726f746f6e4d61696c2f7068702d7532666c69622d7365727665722f6272616e63682f6d61737465722f67726170682f62616467652e737667)](https://codecov.io/gh/ProtonMail/php-u2flib-server)[![Scrutinizer Code Quality](https://camo.githubusercontent.com/edeff438cd7e00124fae7f3e60460fa571f909ea9271f441187d9af85420936b/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f59756269636f2f7068702d7532666c69622d7365727665722f6261646765732f7175616c6974792d73636f72652e706e673f623d6d6173746572)](https://scrutinizer-ci.com/g/ProtonMail/php-u2flib-server/?branch=master) ### Introduction [](#introduction) Serverside U2F library for PHP. Provides functionality for registering tokens and authentication with said tokens. To read more about U2F and how to use a U2F library, visit [developers.yubico.com/U2F](http://developers.yubico.com/U2F). ### License [](#license) The project is licensed under a BSD license. See the file COPYING for exact wording. For any copyright year range specified as YYYY-ZZZZ in this package note that the range specifies every single year in that closed interval. ### Dependencies [](#dependencies) The only dependency is the openssl extension to PHP that has to be enabled. A composer.json is included in the distribution to make things simpler for other project using composer. ### Tests [](#tests) To run the test suite [PHPUnit](https://phpunit.de) is required. To run it, type: ``` $ phpunit ``` ### Health Score 34 — LowBetter than 77% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity22 Limited adoption so far Community22 Small or concentrated contributor base Maturity64 Established project with proven stability Bus Factor1 Top contributor holds 73.7% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~323 days Recently: every ~402 days Total 6 Last Release 2608d ago Major Versions 0.1.0 → 1.0.02016-02-19 ### Community Maintainers ![](https://www.gravatar.com/avatar/837170204c2dc6beffb28cfca8ff9036709ac38d5f5f16ab2b8b8a7cb025c089?d=identicon)[BafS](/maintainers/BafS) ![](https://www.gravatar.com/avatar/07337314fa7f579e749eb6f2565747bf75075974867e44153b8382999fc83a42?d=identicon)[bartbutler](/maintainers/bartbutler) --- Top Contributors [![klali](https://avatars.githubusercontent.com/u/264413?v=4)](https://github.com/klali "klali (160 commits)")[![LukasReschke](https://avatars.githubusercontent.com/u/878997?v=4)](https://github.com/LukasReschke "LukasReschke (17 commits)")[![shield-9](https://avatars.githubusercontent.com/u/3660715?v=4)](https://github.com/shield-9 "shield-9 (11 commits)")[![minisu](https://avatars.githubusercontent.com/u/1684261?v=4)](https://github.com/minisu "minisu (6 commits)")[![maxnet](https://avatars.githubusercontent.com/u/1123701?v=4)](https://github.com/maxnet "maxnet (5 commits)")[![francislavoie](https://avatars.githubusercontent.com/u/2111701?v=4)](https://github.com/francislavoie "francislavoie (4 commits)")[![ThHareau](https://avatars.githubusercontent.com/u/9265111?v=4)](https://github.com/ThHareau "ThHareau (4 commits)")[![ChristophWurst](https://avatars.githubusercontent.com/u/1374172?v=4)](https://github.com/ChristophWurst "ChristophWurst (2 commits)")[![zauguin](https://avatars.githubusercontent.com/u/962229?v=4)](https://github.com/zauguin "zauguin (1 commits)")[![casperbiering](https://avatars.githubusercontent.com/u/461165?v=4)](https://github.com/casperbiering "casperbiering (1 commits)")[![Julian0815](https://avatars.githubusercontent.com/u/37510054?v=4)](https://github.com/Julian0815 "Julian0815 (1 commits)")[![multiwebinc](https://avatars.githubusercontent.com/u/901732?v=4)](https://github.com/multiwebinc "multiwebinc (1 commits)")[![paragonie-security](https://avatars.githubusercontent.com/u/15914520?v=4)](https://github.com/paragonie-security "paragonie-security (1 commits)")[![sattoke](https://avatars.githubusercontent.com/u/1974871?v=4)](https://github.com/sattoke "sattoke (1 commits)")[![StormTide](https://avatars.githubusercontent.com/u/819357?v=4)](https://github.com/StormTide "StormTide (1 commits)")[![bistory](https://avatars.githubusercontent.com/u/108102?v=4)](https://github.com/bistory "bistory (1 commits)") ### Code Quality TestsPHPUnit Static AnalysisPsalm Type Coverage Yes ### Embed Badge ![Health badge](/badges/protonlabs-u2flib-server/health.svg) ``` [![Health](https://phpackages.com/badges/protonlabs-u2flib-server/health.svg)](https://phpackages.com/packages/protonlabs-u2flib-server) ``` ### Alternatives [phpseclib/phpseclib PHP Secure Communications Library - Pure-PHP implementations of RSA, AES, SSH2, SFTP, X.509 etc. 5.6k434.8M1.3k](/packages/phpseclib-phpseclib)[defuse/php-encryption Secure PHP Encryption Library 3.9k162.4M214](/packages/defuse-php-encryption)[sarciszewski/php-future Polyfill new (5.6+) features into old (5.4+) versions of PHP 411.5M7](/packages/sarciszewski-php-future)[tomgrohl/laravel4-php71-encrypter Laravel 4.2 Encrypter for PHP 7.1+ 42248.7k](/packages/tomgrohl-laravel4-php71-encrypter)[adbario/php-encrypter Encryption with AES-256 and HMAC-SHA256 117.5k](/packages/adbario-php-encrypter) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)