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Example code of paragonie/ristretto

Informations about the package ristretto

Ristretto (PHP)

Build Status Latest Stable Version Latest Unstable Version License Downloads

Implements a type-safe API for working with the Ristretto Group in PHP projects.

Requirements

Installing

Documentation

There are two basic types: ScalarValue and GroupElement.

The ScalarValue object wraps a big integer between 0 and the order of the Ristretto Group, L.

The GroupElement object wraps a group element of the Ristretto Group.

If an analogy helps, in the world of Ed25519 and X25519, the ScalarValue is your secret key, and GroupElement is your public key.

For that reason, there are also a SecretKey and PublicKey class, which contains some basic helper methods for ease-of-use.

Usage

You can convert from scalars to group elements with multBase(), and then use scalarPointMultiply() to perform a commutative group action (e.g. Diffie-Hellman).

Otherwise, most operations are within a given type (GroupElement to GroupElement, ScalarValue to ScalarValue).

GroupElement

ScalarValue

Example

This is a PHP implementation of the libsodium example protocol.

Perform a secure two-party computation of f(x) = p(x)^k. x is the input sent to the second party by the first party after blinding it using a random invertible scalar r, and k is a secret key only known by the second party. p(x) is a hash-to-group function.

All versions of ristretto with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
paragonie/constant_time_encoding Version ^2
paragonie/hidden-string Version ^2
paragonie/sodium_compat Version ^1
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