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[Parsing & Serialization](/categories/parsing) 4. / 5. sop/x509 ActiveLibrary[Parsing & Serialization](/categories/parsing) sop/x509 ======== A PHP library for X.509 public key certificates, attribute certificates, certification requests and certification path validation. 0.7.1(5y ago)45884.0k↓19.2%14[4 PRs](https://github.com/sop/x509/pulls)10MITPHPPHP >=7.2 Since May 2Pushed 2y ago2 watchersCompare [ Source](https://github.com/sop/x509)[ Packagist](https://packagist.org/packages/sop/x509)[ Docs](https://github.com/sop/x509)[ RSS](/packages/sop-x509/feed)WikiDiscussions master Synced 1mo ago READMEChangelog (2)Dependencies (6)Versions (17)Used By (10) X.509 ===== [](#x509) [![Build Status](https://camo.githubusercontent.com/40c41bc090e23cd4c6736ad44579f0612059df884e09e4035f658a432dfffb96/68747470733a2f2f7472617669732d63692e6f72672f736f702f783530392e7376673f6272616e63683d6d6173746572)](https://travis-ci.org/sop/x509)[![Scrutinizer Code Quality](https://camo.githubusercontent.com/8dc5c450fc9a5b23674b63c918944e3da324580f82ba99e7639804bdfe44fc7d/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f736f702f783530392f6261646765732f7175616c6974792d73636f72652e706e673f623d6d6173746572)](https://scrutinizer-ci.com/g/sop/x509/?branch=master)[![Coverage Status](https://camo.githubusercontent.com/775486d327221ff25cd7859d9a87199eb7feffc96230a8407a80a2a249de5b1d/68747470733a2f2f636f766572616c6c732e696f2f7265706f732f6769746875622f736f702f783530392f62616467652e7376673f6272616e63683d6d6173746572)](https://coveralls.io/github/sop/x509?branch=master)[![License](https://camo.githubusercontent.com/cea3c154142c968999c8b85a073f05bc84edf6bd0ae3c4075fd5681bc165f61f/68747470733a2f2f706f7365722e707567782e6f72672f736f702f783530392f6c6963656e7365)](https://github.com/sop/x509/blob/master/LICENSE) A PHP library for X.509 public key certificates, attribute certificates, certification requests and certification path validation. Introduction ------------ [](#introduction) This library provides a pure PHP implementation of X.509 certificates. The class hierarchy adapts to the ASN.1 types, which makes it easy to use corresponding RFC's as a reference documentation. Features -------- [](#features) - X.509 certificates ([RFC 5280](https://tools.ietf.org/html/rfc5280)) - Certificate decoding and encoding - Certificate signing - Certification requests ([PKCS #10](https://tools.ietf.org/html/rfc2986)) - CSR decoding and encoding - Certification path - Path building - Path validation - Attribute certificates ([RFC 5755](https://tools.ietf.org/html/rfc5755)) - AC decoding and encoding - AC signing Requirements ------------ [](#requirements) - PHP >=7.2 - gmp - [sop/asn1](https://github.com/sop/asn1) - [sop/x501](https://github.com/sop/x501) - [sop/crypto-types](https://github.com/sop/crypto-types) - [sop/crypto-bridge](https://github.com/sop/crypto-bridge) - [sop/crypto-encoding](https://github.com/sop/crypto-encoding) Installation ------------ [](#installation) This library is available on [Packagist](https://packagist.org/packages/sop/x509). ``` composer require sop/x509 ``` Code examples ------------- [](#code-examples) Examples are located in [`/examples`](https://github.com/sop/x509/tree/master/examples)directory. - [Create a CA certificate](https://github.com/sop/x509/blob/master/examples/create-ca-cert.php) - [Create a CSR](https://github.com/sop/x509/blob/master/examples/create-csr.php) - [Issue a certificate](https://github.com/sop/x509/blob/master/examples/issue-cert.php) - [Validate a certification path](https://github.com/sop/x509/blob/master/examples/path-validate.php) License ------- [](#license) This project is licensed under the MIT License. ### Health Score 40 — FairBetter than 88% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity51 Moderate usage in the ecosystem Community20 Small or concentrated contributor base Maturity56 Maturing project, gaining track record Bus Factor1 Top contributor holds 100% 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 ~202 days Recently: every ~570 days Total 15 Last Release 834d ago PHP version history (3 changes)0.1.0PHP >=5.6.3 0.6.0PHP >=7.0 0.7.0PHP >=7.2 ### Community Maintainers ![](https://www.gravatar.com/avatar/35cf70dd6be68d37fd42490e3ad9c199d2a1f1dd4420f71658998b7d8b694e97?d=identicon)[sop](/maintainers/sop) --- Top Contributors [![sop](https://avatars.githubusercontent.com/u/1017000?v=4)](https://github.com/sop "sop (216 commits)") --- Tags attribute-certificatescertificate-requestcertificate-signing-requestcertificatescertification-pathdecodingencodingparserx509x509certificatecsrattribute certificateaccertification request ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/sop-x509/health.svg) ``` [![Health](https://phpackages.com/badges/sop-x509/health.svg)](https://phpackages.com/packages/sop-x509) ``` ### Alternatives [spomky-labs/pki-framework A PHP framework for managing Public Key Infrastructures. It comprises X.509 public key certificates, attribute certificates, certification requests and certification path validation. 2725.9M11](/packages/spomky-labs-pki-framework)[acmephp/acmephp Let's Encrypt client written in PHP 649155.1k](/packages/acmephp-acmephp)[kelunik/certificate Access certificate details and transform between different formats. 11038.3M8](/packages/kelunik-certificate)[acmephp/core Raw implementation of the ACME protocol in PHP 38973.7k7](/packages/acmephp-core)[acmephp/ssl PHP wrapper around OpenSSL extension providing SSL encoding, decoding, parsing and signing features 141.2M4](/packages/acmephp-ssl)[lsnepomuceno/laravel-a1-pdf-sign Sign PDF files with valid x509 certificates 315101.4k](/packages/lsnepomuceno-laravel-a1-pdf-sign) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)