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• OpenSslNativeJna.java

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org.apache.commons.crypto.jna.OpenSslNativeJna Maven / Gradle / Ivy

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.crypto.jna;

import java.nio.ByteBuffer;

import com.sun.jna.Native;
import com.sun.jna.NativeLong;
import com.sun.jna.ptr.PointerByReference;

class OpenSslNativeJna {

    static final int OPENSSL_INIT_ENGINE_RDRAND = 0x00000200;

    static final int OOSL_JNA_ENCRYPT_MODE = 1;
    static final int OOSL_JNA_DECRYPT_MODE = 0;

    static final boolean INIT_OK;

    static final Throwable INIT_ERROR;

    static {
        boolean ok = false;
        Throwable thrown = null;
        try {
            Native.register("crypto");
            ERR_load_crypto_strings();
            ok = true;
        } catch (Exception e) {
            thrown = e;
        } catch (UnsatisfiedLinkError e) {
            thrown = e;
        } finally {
            INIT_OK = ok;
            INIT_ERROR = thrown;
        }
    }

    //misc
    /**
     * @return OPENSSL_VERSION_NUMBER which is a numeric release version
     * * identifier
     */
    public static native NativeLong SSLeay();

    /**
     * Retrieves version/build information about OpenSSL library.
     *
     * @param type type can be SSLEAY_VERSION, SSLEAY_CFLAGS, SSLEAY_BUILT_ON...
     * @return A pointer to a constant string describing the version of the
     * OpenSSL library or giving information about the library build.
     */
    public static native String SSLeay_version(int type);

    /**
     * Registers the error strings for all libcrypto functions.
     */
    public static native void ERR_load_crypto_strings();

    /**
     * @return the earliest error code from the thread's error queue without
     * modifying it.
     */
    public static native NativeLong ERR_peek_error();



    /**
     * Generates a human-readable string representing the error code e.
     * @see https://www.openssl.org/docs/manmaster/crypto/ERR_error_string.html
     *
     * @param err the error code
     * @param null_ buf is NULL, the error string is placed in a static buffer
     * @return the human-readable error messages.
     */
    public static native String ERR_error_string(NativeLong err, char[] null_);
    //String ERR_lib_error_string(NativeLong err);
    //String ERR_func_error_string(NativeLong err);

    //en-/decryption
    /**
     * Creates a cipher context.
     *
     * @return a pointer to a newly created EVP_CIPHER_CTX for success and
     * NULL for failure.
     */
    public static native PointerByReference EVP_CIPHER_CTX_new();


    /**
     * EVP_CIPHER_CTX_init() remains as an alias for EVP_CIPHER_CTX_reset
     * @param p cipher context
     */
    public static native void EVP_CIPHER_CTX_init(PointerByReference p);

    /**
     * Enables or disables padding
     * @param c cipher context
     * @param pad If the pad parameter is zero then no padding is performed
     * @return always returns 1
     */
    public static native int EVP_CIPHER_CTX_set_padding(PointerByReference c, int pad);

    /**
     * @return an openssl AES evp cipher instance with a 128-bit key CBC mode
     */
    public static native PointerByReference EVP_aes_128_cbc();

    /**
     * @return an openssl AES evp cipher instance with a 128-bit key CTR mode
     */
    public static native PointerByReference EVP_aes_128_ctr();

    /**
     * @return an openssl AES evp cipher instance with a 192-bit key CBC mode
     */
    public static native PointerByReference EVP_aes_192_cbc();

    /**
     * @return an openssl AES evp cipher instance with a 192-bit key CTR mode
     */
    public static native PointerByReference EVP_aes_192_ctr();

    /**
     * @return an openssl AES evp cipher instance with a 256-bit key CBC mode
     */
    public static native PointerByReference EVP_aes_256_cbc();

    /**
     * @return an openssl AES evp cipher instance with a 256-bit key CTR mode
     */
    public static native PointerByReference EVP_aes_256_ctr();

    /**
     * Init a cipher.
     * @param ctx cipher context
     * @param cipher evp cipher instance
     * @param impl engine
     * @param key key
     * @param iv iv
     * @param enc 1 for encryption, 0 for decryption
     * @return 1 for success and 0 for failure.
     */
    public static native int EVP_CipherInit_ex(PointerByReference ctx, PointerByReference cipher, PointerByReference impl, byte key[], byte iv[], int enc);


    /**
     * Continues a multiple-part encryption/decryption operation.
     *
     * @param ctx cipher context
     * @param bout output byte buffer
     * @param outl output length
     * @param in input byte buffer
     * @param inl input length
     * @return 1 for success and 0 for failure.
     */
    public static native int EVP_CipherUpdate(PointerByReference ctx, ByteBuffer bout, int[] outl, ByteBuffer in, int inl);

    /**
     * Finishes a multiple-part operation.
     *
     * @param ctx cipher context
     * @param bout output byte buffer
     * @param outl output length
     * @return 1 for success and 0 for failure.
     */
    public static native int EVP_CipherFinal_ex(PointerByReference ctx, ByteBuffer bout, int[] outl);

    /**
     * Clears all information from a cipher context and free up any allocated
     * memory associate with it, including ctx itself.
     * @param c openssl evp cipher
     */
    public static native void EVP_CIPHER_CTX_free(PointerByReference c);

    /**
     * Clears all information from a cipher context and free up any allocated
     * * memory associate with it.
     * @param c openssl evp cipher
     */
    public static native void EVP_CIPHER_CTX_cleanup(PointerByReference c);

    //Random generator
    /**
     * OpenSSL uses for random number generation
     * @return pointers to the respective methods
     */
    public static native PointerByReference RAND_get_rand_method();

    /**
     * OpenSSL uses for random number generation.
     * @return pointers to the respective methods
     */
    public static native PointerByReference RAND_SSLeay();

    /**
     * Generates random data
     * @param buf the bytes for generated random.
     * @param num buffer length
     * @return 1 on success, 0 otherwise.
     */
    public static native int RAND_bytes(ByteBuffer buf, int num);

    /**
     * Releases all functional references.
     *
     * @param e engine reference.
     * @return 0 on success, 1 otherwise.
     */
    public static native int ENGINE_finish(PointerByReference e);

    /**
     * Frees the structural reference
     * @param e engine reference.
     * @return 0 on success, 1 otherwise.
     */
    public static native int ENGINE_free(PointerByReference e);

    /**
     * Cleanups before program exit, it will avoid memory leaks.
     * @return 0 on success, 1 otherwise.
     */
    public static native int ENGINE_cleanup();

    /**
     * Obtains a functional reference from an existing structural reference.
     * @param e engine reference
     * @return zero if the ENGINE was not already operational and couldn't be successfully initialised
     */
    public static native int ENGINE_init(PointerByReference e);

    /**
     * Sets the engine as the default for random number generation.
     * @param e  engine reference
     * @param flags ENGINE_METHOD_RAND
     * @return zero if failed.
     */
    public static native int ENGINE_set_default(PointerByReference e, int flags);

    /**
     * Gets engine by id
     * @param id engine id
     * @return engine instance
     */
    public static native PointerByReference ENGINE_by_id(String id);

    /**
     * Initializes the engine.
     */
    public static native void ENGINE_load_rdrand();

    //TODO callback multithreading
    /*public interface Id_function_cb extends Callback {
        long invoke ();
    }

    public interface Locking_function_cb extends Callback {
        void invoke(int mode, int n, String file, int line);
    }

    public static final Id_function_cb default_id_function = new Id_function_cb() {

        @Override
        public long invoke() {
            //id always positive
            long id = Thread.currentThread().getId();
            return id;
        }
    };

    int CRYPTO_num_locks();
    void CRYPTO_set_id_callback(Id_function_cb id_function);
    void CRYPTO_set_locking_callback(Locking_function_cb locking_function);*/
}