ParagonIE_Sodium_Crypto::generichash_init_salt_personal( string $key = '', int $outputLength = 32, string $salt = '', string $personal = '' ): string

794    public static function generichash_init_salt_personal(795        $key = '',796        $outputLength = 32,797        $salt = '',798        $personal = ''799    ) {800        // This ensures that ParagonIE_Sodium_Core_BLAKE2b::$iv is initialized801        ParagonIE_Sodium_Core_BLAKE2b::pseudoConstructor();802 803        $k = null;804        if (!empty($key)) {805            $k = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($key);806            if ($k->count() > ParagonIE_Sodium_Core_BLAKE2b::KEYBYTES) {807                throw new RangeException('Invalid key size');808            }809        }810        if (!empty($salt)) {811            $s = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($salt);812        } else {813            $s = null;814        }815        if (!empty($salt)) {816            $p = ParagonIE_Sodium_Core_BLAKE2b::stringToSplFixedArray($personal);817        } else {818            $p = null;819        }820 821        /** @var SplFixedArray $ctx */822        $ctx = ParagonIE_Sodium_Core_BLAKE2b::init($k, $outputLength, $s, $p);823 824        return ParagonIE_Sodium_Core_BLAKE2b::contextToString($ctx);825    }