sodium_crypto_sign

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_sign — Sign a message

说明

sodium_crypto_sign ( string $message , string $secret_key ) : string

Sign a message with a secret key, that can be verified by the corresponding public key. This function attaches the signature to the message. See sodium_crypto_sign_detached() for detached signatures.

参数

message: Message to sign.
secret_key: Secret key. See sodium_crypto_sign_secretkey()

返回值

Signed message (not encrypted).

User Contributed Notes

craig at craigfrancis dot co dot uk 25-Aug-2018 07:34


Here's a quick example on how to use sodium_crypto_sign(); where you have a message that you want to sign, so anyone with the public key can confirm that the message hasn't been tampered with.



This is similar to sodium_crypto_sign_detached(), but the returned string contains the original message as well (in plain text, at the end, so anyone can read it).



<?php



// $sign_seed = random_bytes(SODIUM_CRYPTO_SIGN_SEEDBYTES);

// $sign_pair = sodium_crypto_sign_seed_keypair($sign_seed);



$sign_pair = sodium_crypto_sign_keypair();

$sign_secret = sodium_crypto_sign_secretkey($sign_pair);

$sign_public = sodium_crypto_sign_publickey($sign_pair);



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

// Person 1, signing



$message = 'Hello';



$message_signed = sodium_crypto_sign($message, $sign_secret);



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

// Person 2, verifying



$message = sodium_crypto_sign_open($message_signed, $sign_public);



echo $message . "\n";



?>