sodium_crypto_box_secretkey

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_box_secretkey — Extracts the secret key from a crypto_box keypair

Description

sodium_crypto_box_secretkey(#[\SensitiveParameter] string $key_pair): string

Given a keypair, fetch only the secret key.

Parameters

key_pair
A keypair, such as one generated by sodium_crypto_box_keypair() or sodium_crypto_box_seed_keypair()

Return Values

X25519 secret key.