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    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.

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