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): string
The 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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https://www.php.net/manual/en/function.sodium-crypto-generichash-init.php