sodium_crypto_generichash_update

Add message to a hash

Description

true sodium_crypto_generichash_update(string &$state, string $message)

Appends a message to the internal hash state.

Parameters

state

The return value of sodium_crypto_generichash_init.

message

Data to append to the hashing state.

Return Values

Always returns true.

Examples

Example #1 sodium_crypto_generichash_update example

<?php
$messages = [random_bytes(32), random_bytes(32), random_bytes(16)];
$state = sodium_crypto_generichash_init();
foreach ($messages as $message) {
    sodium_crypto_generichash_update($state, $message);
}
$final = sodium_crypto_generichash_final($state);
var_dump(sodium_bin2hex($final));

$allAtOnce = sodium_crypto_generichash(implode('', $messages));
var_dump(sodium_bin2hex($allAtOnce));
?>

The above example will output something similar to:

string(64) "e16e28bbbbcc39d9f5b1cbc33c41f1d217808640103e57a41f24870f79831e04"
string(64) "e16e28bbbbcc39d9f5b1cbc33c41f1d217808640103e57a41f24870f79831e04"