This library is a fork from phpecc/phpecc, which is itself a fork of mdanter/ecc.
It should serve as a drop-in replacement for any applications that previously depended
on either method.
However, Paragon Initiative Enterprises CANNOT guarantee the security of this library until we have fully audited its code. This notice will be removed when we believe it to be secure.
In the meantime, DO NOT submit bug bounty reports to us for this code. They will be closed as out of scope. File an Issue here instead!
If you just need Diffie-Hellman or ECDSA, you should install EasyECC instead of working with this library directly. EasyECC was designed to use PHPECC in a secure-by-default manner.
This library is a rewrite/update of Matyas Danter's ECC library. All credit goes to him.
For more information on Elliptic Curve Cryptography please read this fine article.
The library supports the following curves:
- secp112r1
- secp256k1
- nistp192
- nistp224
- nistp256 / secp256r1
- nistp384 / secp384r1
- nistp521
During ECDSA, a random value k is required. It is acceptable to use a true RNG to generate this value, but
should the same k value ever be repeatedly used for a key, an attacker can recover that signing key.
The HMAC random generator can derive a deterministic k value from the message hash and private key, voiding
this concern.
The library uses a non-branching Montgomery ladder for scalar multiplication, as it's constant time and avoids secret dependant branches.
This package is released under the MIT license.
- PHP 7.1+ or PHP 8.0+
- composer
- ext-gmp
You can install this library via Composer :
composer require paragonie/ecc:^2
When sending in pull requests, please make sure to run the make command.
The default target runs all PHPUnit and PHPCS tests. All tests must validate for your contribution to be accepted.
It's also always a good idea to check the results of the Scrutinizer analysis for your pull requests.
Examples: