Sodium Functions
PHP Manual

sodium_crypto_sign_ed25519_pk_to_curve25519

Convert an Ed25519 public key to a Curve25519 public key

Description

string sodium_crypto_sign_ed25519_pk_to_curve25519(string $public_key)

Given an Ed25519 public key, calculate the birationally equivalent X25519 public key.

Parameters

public_key

Public key suitable for the crypto_sign functions.

Return Values

Public key suitable for the crypto_box functions.