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Summery Summery
Initialize a BLAKE2b hashing context, for use in a streaming interface.
Syntax Syntax
Parameters Parameters
- $key
-
(Optional) If specified must be a string between 16 and 64 bytes
Default value: ''
- $length
-
(Optional) The size of the desired hash output
Default value: self::CRYPTO_GENERICHASH_BYTES
Return Return
(string) A BLAKE2 hashing context, encoded as a string (To be 100% compatible with ext/libsodium)
Source Source
File: wp-includes/sodium_compat/src/Compat.php
public static function crypto_generichash_init($key = '', $length = self::CRYPTO_GENERICHASH_BYTES)
{
/* Type checks: */
if (is_null($key)) {
$key = '';
}
ParagonIE_Sodium_Core_Util::declareScalarType($key, 'string', 1);
ParagonIE_Sodium_Core_Util::declareScalarType($length, 'int', 2);
/* Input validation: */
if (!empty($key)) {
if (ParagonIE_Sodium_Core_Util::strlen($key) < self::CRYPTO_GENERICHASH_KEYBYTES_MIN) {
throw new SodiumException('Unsupported key size. Must be at least CRYPTO_GENERICHASH_KEYBYTES_MIN bytes long.');
}
if (ParagonIE_Sodium_Core_Util::strlen($key) > self::CRYPTO_GENERICHASH_KEYBYTES_MAX) {
throw new SodiumException('Unsupported key size. Must be at most CRYPTO_GENERICHASH_KEYBYTES_MAX bytes long.');
}
}
if (self::useNewSodiumAPI()) {
return sodium_crypto_generichash_init($key, $length);
}
if (self::use_fallback('crypto_generichash_init')) {
return (string) call_user_func('\\Sodium\\crypto_generichash_init', $key, $length);
}
if (PHP_INT_SIZE === 4) {
return ParagonIE_Sodium_Crypto32::generichash_init($key, $length);
}
return ParagonIE_Sodium_Crypto::generichash_init($key, $length);
}