1 /*

     2  * Copyright (c) 2005, 2016, 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 <dlfcn.h>

    31 

    32 #include <jni_util.h>

    33 

    34 #include "j2secmod.h"

    35 #include "pkcs11wrapper.h"

    36 

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

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

    39     void *fAddress = dlsym(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 

    49 JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssGetLibraryHandle

    50   (JNIEnv *env, jclass thisClass, jstring jLibName)

    51 {

    52     void *hModule;

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

    54     if (libName == NULL) {

    55         return 0L;

    56     }

    57 

    58     // look up existing handle only, do not load

    59 #if defined(AIX)

    60     hModule = dlopen(libName, RTLD_LAZY);

    61 #else

    62     hModule = dlopen(libName, RTLD_NOLOAD);

    63 #endif

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

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

    66     return ptr_to_jlong(hModule);

    67 }

    68 

    69 JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssLoadLibrary

    70   (JNIEnv *env, jclass thisClass, jstring jLibName)

    71 {

    72     void *hModule;

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

    74     if (libName == NULL) {

    75        return 0L;

    76     }

    77 

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

    79     hModule = dlopen(libName, RTLD_LAZY);

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

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

    82 

    83     if (hModule == NULL) {

    84         throwIOException(env, dlerror());

    85         return 0;

    86     }

    87 

    88     return ptr_to_jlong(hModule);

    89 }