1/*
2 * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29
30#include <jni_util.h>
31
32#include "j2secmod.h"
33
34extern void throwNullPointerException(JNIEnv *env, const char *message);
35extern void throwIOException(JNIEnv *env, const char *message);
36
37void *findFunction(JNIEnv *env, jlong jHandle, const char *functionName) {
38    HINSTANCE hModule = (HINSTANCE)jHandle;
39    void *fAddress = GetProcAddress(hModule, functionName);
40    if (fAddress == NULL) {
41        char errorMessage[256];
42        _snprintf(errorMessage, sizeof(errorMessage), "Symbol not found: %s", functionName);
43        throwNullPointerException(env, errorMessage);
44        return NULL;
45    }
46    return fAddress;
47}
48
49JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssGetLibraryHandle
50  (JNIEnv *env, jclass thisClass, jstring jLibName)
51{
52    const char *libName = (*env)->GetStringUTFChars(env, jLibName, NULL);
53    HMODULE hModule = GetModuleHandle(libName);
54    dprintf2("-handle for %s: %d\n", libName, hModule);
55    (*env)->ReleaseStringUTFChars(env, jLibName, libName);
56    return (jlong)hModule;
57}
58
59JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssLoadLibrary
60  (JNIEnv *env, jclass thisClass, jstring jName)
61{
62    HINSTANCE hModule;
63    LPVOID lpMsgBuf;
64
65    const char *libName = (*env)->GetStringUTFChars(env, jName, NULL);
66    dprintf1("-lib %s\n", libName);
67
68    hModule = LoadLibrary(libName);
69    (*env)->ReleaseStringUTFChars(env, jName, libName);
70
71    if (hModule == NULL) {
72        FormatMessage(
73            FORMAT_MESSAGE_ALLOCATE_BUFFER |
74            FORMAT_MESSAGE_FROM_SYSTEM |
75            FORMAT_MESSAGE_IGNORE_INSERTS,
76            NULL,
77            GetLastError(),
78            0, /* Default language */
79            (LPTSTR) &lpMsgBuf,
80            0,
81            NULL
82        );
83        dprintf1("-error: %s\n", lpMsgBuf);
84        throwIOException(env, (char*)lpMsgBuf);
85        LocalFree(lpMsgBuf);
86        return 0;
87    }
88    dprintf2("-handle: %d (0X%X)\n", hModule, hModule);
89    return (jlong)hModule;
90}
91