ParagonIE_Sodium_Compat::crypto_kx_seed_keypair( string $seed ): string

2094    public static function crypto_kx_seed_keypair(2095        #[\SensitiveParameter]2096        $seed2097    ) {2098        ParagonIE_Sodium_Core_Util::declareScalarType($seed, 'string', 1);2099 2100        $seed = (string) $seed;2101 2102        if (ParagonIE_Sodium_Core_Util::strlen($seed) !== self::CRYPTO_KX_SEEDBYTES) {2103            throw new SodiumException('seed must be SODIUM_CRYPTO_KX_SEEDBYTES bytes');2104        }2105 2106        $sk = self::crypto_generichash($seed, '', self::CRYPTO_KX_SECRETKEYBYTES);2107        $pk = self::crypto_scalarmult_base($sk);2108        return $sk . $pk;2109    }