sodium_crypto_generichash_init
(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_generichash_init — Initialize a hash for streaming
Description
sodium_crypto_generichash_init(string
$key = "", int $length = SODIUM_CRYPTO_GENERICHASH_BYTES): stringThe initialization method for the streaming generichash API.
Parameters
-
key -
The generichash key.
-
length -
The expected output length of the hash function.
Return Values
Returns a hash state, serialized as a raw binary string.
Examples
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));
?>
The above example will output something similar to:
string(64) "a2939a9163cb7c796ec28e01028489e72475c136b2697ea59e3e760ab4a8ab20" string(64) "a2939a9163cb7c796ec28e01028489e72475c136b2697ea59e3e760ab4a8ab20"
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