sodium_crypto_box	sodium_crypto_box_keypair_from_secretkey_and_publickey

Sodium Functions	Last updated: Mon, 26 Oct 2026

sodium_crypto_box_keypair

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_box_keypair — Randomly generate a secret key and a corresponding public key

function sodium_crypto_box_keypair(): string

Generates a secret key and a public key as one string.

To get the secret key out of this unified keypair string, see sodium_crypto_box_secretkey(). To get the public key out of this unified keypair string, see sodium_crypto_box_publickey().

This function has no parameters.

One string containing both the X25519 secret key and corresponding X25519 public key.

sodium_crypto_box	sodium_crypto_box_keypair_from_secretkey_and_publickey

Sodium Functions	Last updated: Mon, 26 Oct 2026