/*

 * Copyright (c) 2005, 2011, 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 <jni_util.h>

#include "j2secmod.h"

extern void throwNullPointerException(JNIEnv *env, const char *message);

extern void throwIOException(JNIEnv *env, const char *message);

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

    HINSTANCE hModule = (HINSTANCE)jHandle;

    void *fAddress = GetProcAddress(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)

{

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

    HMODULE hModule = GetModuleHandle(libName);

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

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

    return (jlong)hModule;

}

JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssLoadLibrary

  (JNIEnv *env, jclass thisClass, jstring jName)

{

    HINSTANCE hModule;

    LPVOID lpMsgBuf;

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

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

    hModule = LoadLibrary(libName);

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

    if (hModule == NULL) {

        FormatMessage(

            FORMAT_MESSAGE_ALLOCATE_BUFFER |

            FORMAT_MESSAGE_FROM_SYSTEM |

            FORMAT_MESSAGE_IGNORE_INSERTS,

            NULL,

            GetLastError(),

            0, /* Default language */

            (LPTSTR) &lpMsgBuf,

            0,

            NULL

        );

        dprintf1("-error: %s\n", lpMsgBuf);

        throwIOException(env, (char*)lpMsgBuf);

        LocalFree(lpMsgBuf);

        return 0;

    }

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

    return (jlong)hModule;

}