sodium_crypto_generichash_init

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_generichash_init — Initialize a hash for streaming

Descrição

sodium_crypto_generichash_init(#[\SensitiveParameter] string $key = "", int $length = SODIUM_CRYPTO_GENERICHASH_BYTES): string

The initialization method for the streaming generichash API.

Parâmetros

key: The generichash key.
length: The expected output length of the hash function.

Valor Retornado

Returns a hash state, serialized as a raw binary string.

Exemplos

Example #1 sodium_crypto_generichash_init() example

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

O exemplo acima produzirá algo semelhante a:

string(64) "a2939a9163cb7c796ec28e01028489e72475c136b2697ea59e3e760ab4a8ab20"
string(64) "a2939a9163cb7c796ec28e01028489e72475c136b2697ea59e3e760ab4a8ab20"