sodium_crypto_box

(PHP 7 >= 7.2.0)

sodium_crypto_box — Encrypt a message

说明

sodium_crypto_box ( string $msg , string $nonce , string $key ) : string

Warning

本函数还未编写文档，仅有参数列表。

参数

msg
nonce
key

返回值

User Contributed Notes

craig at craigfrancis dot co dot uk 23-Jan-2018 01:13


Here's a quick example on how to use sodium_crypto_box(); where you have 2 people exchanging a $message, where person 1 encrypts it so that only person 2 can decrypt it, and be sure that person 1 actually sent it (without it being tampered with).



<?php



$keypair1 = sodium_crypto_box_keypair();

$keypair1_public = sodium_crypto_box_publickey($keypair1);

$keypair1_secret = sodium_crypto_box_secretkey($keypair1);



$keypair2 = sodium_crypto_box_keypair();

$keypair2_public = sodium_crypto_box_publickey($keypair2);

$keypair2_secret = sodium_crypto_box_secretkey($keypair2);



//--------------------------------------------------

// Person 1, encrypting



$message = 'hello';



$nonce = random_bytes(SODIUM_CRYPTO_BOX_NONCEBYTES);



$encryption_key = sodium_crypto_box_keypair_from_secretkey_and_publickey($keypair1_secret, $keypair2_public);

$encrypted = sodium_crypto_box($message, $nonce, $encryption_key);



echo base64_encode($encrypted) . "\n";



//--------------------------------------------------

// Person 2, decrypting



$decryption_key = sodium_crypto_box_keypair_from_secretkey_and_publickey($keypair2_secret, $keypair1_public);

$decrypted = sodium_crypto_box_open($encrypted, $nonce, $decryption_key);



echo $decrypted . "\n";



?>