/*

 * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <dlfcn.h>

#include <jni_util.h>

#include "j2secmod.h"

#include "pkcs11wrapper.h"

void *findFunction(JNIEnv *env, jlong jHandle, const char *functionName) {

    void *hModule = (void*)jlong_to_ptr(jHandle);

    void *fAddress = dlsym(hModule, functionName);

    if (fAddress == NULL) {

        char errorMessage[256];

        snprintf(errorMessage, sizeof(errorMessage), "Symbol not found: %s", functionName);

        throwNullPointerException(env, errorMessage);

        return NULL;

    }

    return fAddress;

}

JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssGetLibraryHandle

  (JNIEnv *env, jclass thisClass, jstring jLibName)

{

    void *hModule;

    const char *libName = (*env)->GetStringUTFChars(env, jLibName, NULL);

    if (libName == NULL) {

        return 0L;

    }

    // look up existing handle only, do not load

#if defined(AIX)

    hModule = dlopen(libName, RTLD_LAZY);

#else

    hModule = dlopen(libName, RTLD_NOLOAD);

#endif

    dprintf2("-handle for %s: %u\n", libName, hModule);

    (*env)->ReleaseStringUTFChars(env, jLibName, libName);

    return ptr_to_jlong(hModule);

}

JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssLoadLibrary

  (JNIEnv *env, jclass thisClass, jstring jLibName)

{

    void *hModule;

    const char *libName = (*env)->GetStringUTFChars(env, jLibName, NULL);

    if (libName == NULL) {

       return 0L;

    }

    dprintf1("-lib %s\n", libName);

    hModule = dlopen(libName, RTLD_LAZY);

    (*env)->ReleaseStringUTFChars(env, jLibName, libName);

    dprintf2("-handle: %u (0X%X)\n", hModule, hModule);

    if (hModule == NULL) {

        throwIOException(env, dlerror());

        return 0;

    }

    return ptr_to_jlong(hModule);

}