PHP Secure Communications Library
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phpseclib - PHP Secure Communications Library

CI Status

Supporting phpseclib


MIT-licensed pure-PHP implementations of the following:

SSH-2, SFTP, X.509, an arbitrary-precision integer arithmetic library, Ed25519 / Ed449 / Curve25519 / Curve449, ECDSA / ECDH (with support for 66 curves), RSA (PKCS#1 v2.2 compliant), DSA / DH, DES / 3DES / RC4 / Rijndael / AES / Blowfish / Twofish / Salsa20 / ChaCha20, GCM / Poly1305




  • Development Branch
  • Unstable API
  • Do not use in production


  • Long term support (LTS) release
  • Major expansion of cryptographic primitives
  • Minimum PHP version: 5.6.1
  • PSR-4 autoloading with namespace rooted at \phpseclib3
  • Install via Composer: composer require phpseclib/phpseclib:~3.0


  • Long term support (LTS) release
  • Modernized version of 1.0
  • Minimum PHP version: 5.3.3
  • PSR-4 autoloading with namespace rooted at \phpseclib
  • Install via Composer: composer require phpseclib/phpseclib:~2.0


Security contact information

To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.


Need Support?

Special Thanks

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  1. Fork the Project

  2. Ensure you have Composer installed (see Composer Download Instructions)

  3. Install Development Dependencies

    composer install
  4. Create a Feature Branch

  5. Run continuous integration checks:

    composer run-script all-quality-tools
  6. Send us a Pull Request