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Example code of simplito/elliptic-php

Informations about the package elliptic-php

Fast Elliptic Curve Cryptography in PHP

Information

This library is a PHP port of elliptic, a great JavaScript ECC library.

This software is licensed under the MIT License.

Projects which use Fast ECC PHP library: PrivMX WebMail.

Benchmarks

Installation

You can install this library via Composer:

Implementation details

ECDSA is using deterministic k value generation as per RFC6979. Most of the curve operations are performed on non-affine coordinates (either projective or extended), various windowing techniques are used for different cases.

NOTE: curve25519 could not be used for ECDSA, use ed25519 instead.

All operations are performed in reduction context using bn-php.

API

ECDSA

EdDSA

ECDH

NOTE: .derive() returns a BN instance. The resulting hex string is not zero-padded to constant size. Note that when interoperating with other libraries or using the result in a hash function.

Using EC directly

Use case examples:

Computing public key from private

Verifying Bitcoin Message Signature

Verifying Ethereum Signature

ECDH (secret based, base58 format)

For usage in ed25519 oriented platforms like e.g. BigChainDB who use base58 encoded public / private keys.

BIP32 Public Parent Key -> Public Child Key derivation example

All versions of elliptic-php with dependencies

PHP Build Version
Package Version
Requires ext-gmp Version *
simplito/bn-php Version ~1.1.0
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