sodium_crypto_scalarmult

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_scalarmult — Compute a shared secret given a user's secret key and another user's public key

Description

sodium_crypto_scalarmult(string $n, string $p): string

Elliptic Curve Diffie-Hellman. Calculates scalar n times point p, on an elliptic curve.

Parameters

n
scalar, which is typically a secret key
p
point (x-coordinate), which is typically a public key

Return Values

A 32-byte random string.