(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_box_open — Authenticated public-key decryption
$ciphertext, string $nonce, #[\SensitiveParameter] string $key_pair): string|falseDecrypt a message using asymmetric (public key) cryptography.
ciphertextThe encrypted message to attempt to decrypt.
nonceA number that must be only used once, per message. 24 bytes long. This is a large enough bound to generate randomly (i.e. random_bytes()).
key_pairSee sodium_crypto_box_keypair_from_secretkey_and_publickey(). This should include the sender's public key and the recipient's secret key.
Returns the plaintext message on success, or false on failure.