sodium_crypto_aead_chacha20poly1305_ietf_encrypt

(PHP 7 >= 7.2.0)

sodium_crypto_aead_chacha20poly1305_ietf_encrypt — Encrypt a message

Descrierea

sodium_crypto_aead_chacha20poly1305_ietf_encrypt ( string $message , string $additional_data , string $nonce , string $key ) : string

Avertizare

Această funcție nu este documentată în prezent; este disponibilă numai lista sa de argumente.

Parametri

message
additional_data
nonce
key

Valorile întoarse

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User Contributed Notes 1 note

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craig at craigfrancis dot co dot uk ¶

6 years ago


Here's a quick example on how to use sodium_crypto_aead_chacha20poly1305_ietf_encrypt(); where you have 1 key to encrypt and decrypt.

<?php

$key = sodium_crypto_aead_chacha20poly1305_ietf_keygen();

//--------------------------------------------------
// Encrypting

$message = 'hello';

$nonce = random_bytes(SODIUM_CRYPTO_AEAD_CHACHA20POLY1305_IETF_NPUBBYTES);

$encrypted = sodium_crypto_aead_chacha20poly1305_ietf_encrypt($message, $nonce, $nonce, $key);

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

//--------------------------------------------------
// Decrypting

$decrypted = sodium_crypto_aead_chacha20poly1305_ietf_decrypt($encrypted, $nonce, $nonce, $key);

echo $decrypted . "\n";

?>

And just to confirm, the $nonce is used twice - the first time it's in the authentication tag ($ad):

https://twitter.com/craigfrancis/status/949614546259513344

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