ParagonIE_Sodium_Compat::crypto_sign_ed25519_sk_to_curve25519() public WP 1.0

Convert an Ed25519 secret key to a Curve25519 secret key

{} Это метод класса: ParagonIE_Sodium_Compat{}

Хуков нет.

Возвращает

Строку.

Использование

$result = ParagonIE_Sodium_Compat::crypto_sign_ed25519_sk_to_curve25519( $sk );

$sk(строка) (обязательный)

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Код ParagonIE_Sodium_Compat::crypto_sign_ed25519_sk_to_curve25519() ParagonIE Sodium Compat::crypto sign ed25519 sk to curve25519 ^{WP 5.9}

public static function crypto_sign_ed25519_sk_to_curve25519($sk)
{
    /* Type checks: */
    ParagonIE_Sodium_Core_Util::declareScalarType($sk, 'string', 1);

    /* Input validation: */
    if (ParagonIE_Sodium_Core_Util::strlen($sk) < self::CRYPTO_SIGN_SEEDBYTES) {
        throw new SodiumException('Argument 1 must be at least CRYPTO_SIGN_SEEDBYTES long.');
    }
    if (self::useNewSodiumAPI()) {
        if (is_callable('crypto_sign_ed25519_sk_to_curve25519')) {
            return sodium_crypto_sign_ed25519_sk_to_curve25519($sk);
        }
    }
    if (self::use_fallback('crypto_sign_ed25519_sk_to_curve25519')) {
        return (string) call_user_func('\\Sodium\\crypto_sign_ed25519_sk_to_curve25519', $sk);
    }

    $h = hash('sha512', ParagonIE_Sodium_Core_Util::substr($sk, 0, 32), true);
    $h[0] = ParagonIE_Sodium_Core_Util::intToChr(
        ParagonIE_Sodium_Core_Util::chrToInt($h[0]) & 248
    );
    $h[31] = ParagonIE_Sodium_Core_Util::intToChr(
        (ParagonIE_Sodium_Core_Util::chrToInt($h[31]) & 127) | 64
    );
    return ParagonIE_Sodium_Core_Util::substr($h, 0, 32);
}