/* FeatureDetect.java
 *
 * Copyright (C) 2006-2025 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */

package com.wolfssl.wolfcrypt;

/**
 * Native feature detection class
 * Used to expose native preprocessor values to Java
 */
public class FeatureDetect {

    /**
     * Tests if MD5 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Md5Enabled();

    /**
     * Tests if SHA-1 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean ShaEnabled();

    /**
     * Tests if SHA-224 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Sha224Enabled();

    /**
     * Tests if SHA-256 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Sha256Enabled();

    /**
     * Tests if SHA-384 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Sha384Enabled();

    /**
     * Tests if SHA-512 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Sha512Enabled();

    /**
     * Tests if AES is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean AesEnabled();

    /**
     * Tests if AES-128 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Aes128Enabled();

    /**
     * Tests if AES-192 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Aes192Enabled();

    /**
     * Tests if AES-256 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Aes256Enabled();

    /**
     * Tests if AES-CBC is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean AesCbcEnabled();


    /**
     * Tests if AES-GCM is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean AesGcmEnabled();

    /**
     * Tests if AES-GCM stream mode (WOLFSSL_AESGCM_STREAM) is compiled into
     * native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean AesGcmStreamEnabled();

    /**
     * Tests if 3DES is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Des3Enabled();

    /**
     * Tests if ChaCha is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean ChaChaEnabled();

    /**
     * Tests if HMAC is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacEnabled();

    /**
     * Tests if HMAC-MD5 is compiled into the native wolfSSL library and
     * available for use.
     *
     * For FIPS 140-3, even if MD5 is compiled into the
     * library, HMAC-MD5 is not available and will throw BAD_FUNC_ARG.
     * Use this helper to prevent people from calling it in the first place.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacMd5Enabled();

    /**
     * Tests if HMAC-SHA1 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacShaEnabled();

    /**
     * Tests if HMAC-SHA224 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha224Enabled();

    /**
     * Tests if HMAC-SHA256 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha256Enabled();

    /**
     * Tests if HMAC-SHA384 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha384Enabled();

    /**
     * Tests if HMAC-SHA512 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha512Enabled();

    /**
     * Tests if HMAC-SHA3-224 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha3_224Enabled();

    /**
     * Tests if HMAC-SHA3-256 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha3_256Enabled();

    /**
     * Tests if HMAC-SHA3-384 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha3_384Enabled();

    /**
     * Tests if HMAC-SHA3-512 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false.
     */
    public static native boolean HmacSha3_512Enabled();

    /**
     * Tests if PKCS#5 PBKDF1 is compiled into the native wolfSSL library.
     *
     * @return true if PBKDF1 is enabled (HAVE_PBKDF1, !NO_PWDBASED),
     *         otherwise false.
     */
    public static native boolean Pbkdf1Enabled();

    /**
     * Tests if PKCS#5 v2.1 PBKDF2 is compiled into the native wolfSSL library.
     *
     * @return true if PBKDF2 is enabled (HAVE_PBKDF2, !NO_PWDBASED, !NO_HMAC),
     *         otherwise false.
     */
    public static native boolean Pbkdf2Enabled();

    /**
     * Tests if PKCS#12 PBKDF is compiled into the native wolfSSL library.
     *
     * @return true if PKCS#12 PBKDF is enabled (HAVE_PKCS12, !NO_PWDBASED),
     *         otherwise false.
     */
    public static native boolean Pkcs12PbkdfEnabled();

    /**
     * Tests if RSA is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean RsaEnabled();

    /**
     * Tests if RSA key generation is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean RsaKeyGenEnabled();

    /**
     * Tests if DH is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean DhEnabled();

    /**
     * Tests if ECC is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean EccEnabled();

    /**
     * Tests if ECC key generation is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean EccKeyGenEnabled();

    /**
     * Tests if ECDHE / wc_ecc_shared_secret() is compiled into the native
     * wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean EccDheEnabled();

    /**
     * Tests if Curve25519 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Curve25519Enabled();

    /**
     * Tests if Ed25519 is compiled into the native wolfSSL library.
     *
     * @return true if enabled, otherwise false if not compiled in.
     */
    public static native boolean Ed25519Enabled();

    /**
     * Loads JNI library.
     *
     * The native library is expected to be called "wolfcryptjni", and must be
     * on the system library search path.
     *
     * "wolfcryptjni" links against the wolfSSL native C library ("wolfssl"),
     * and for Windows compatibility "wolfssl" needs to be explicitly loaded
     * first here.
     */
    static {
        int fipsLoaded = 0;

        String osName = System.getProperty("os.name");
        if (osName != null && osName.toLowerCase().contains("win")) {
            try {
                /* Default wolfCrypt FIPS library on Windows is compiled
                 * as "wolfssl-fips" by Visual Studio solution */
                System.loadLibrary("wolfssl-fips");
                fipsLoaded = 1;
            } catch (UnsatisfiedLinkError e) {
                /* wolfCrypt FIPS not available */
            }

            if (fipsLoaded == 0) {
                /* FIPS library not loaded, try normal libwolfssl */
                System.loadLibrary("wolfssl");
            }
        }

        /* Load wolfcryptjni library */
        System.loadLibrary("wolfcryptjni");
    }

    /** Default FeatureDetect constructor */
    public FeatureDetect() { }
}