PHP Manual
Sodium Functions
Convert an Ed25519 public key to a Curve25519 public key

sodium_crypto_sign_ed25519_pk_to_curve25519

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_sign_ed25519_pk_to_curve25519 — Convert an Ed25519 public key to a Curve25519 public key

Description

sodium_crypto_sign_ed25519_pk_to_curve25519(string $public_key): string

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.

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