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 }