1 /* 2 * Copyright (c) 2005, 2012, 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 36 void *findFunction(JNIEnv *env, jlong jHandle, const char *functionName) { 37 void *hModule = (void*)jlong_to_ptr(jHandle); 38 void *fAddress = dlsym(hModule, functionName); 39 if (fAddress == NULL) { 40 char errorMessage[256]; 41 snprintf(errorMessage, sizeof(errorMessage), "Symbol not found: %s", functionName); 42 throwNullPointerException(env, errorMessage); 43 return NULL; 44 } 45 return fAddress; 46 } 47 48 JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssGetLibraryHandle 49 (JNIEnv *env, jclass thisClass, jstring jLibName) 50 { 51 const char *libName = (*env)->GetStringUTFChars(env, jLibName, NULL); 52 // look up existing handle only, do not load 53 void *hModule = dlopen(libName, RTLD_NOLOAD); 54 dprintf2("-handle for %s: %u\n", libName, hModule); 55 (*env)->ReleaseStringUTFChars(env, jLibName, libName); 56 return ptr_to_jlong(hModule); 57 } 58 59 JNIEXPORT jlong JNICALL Java_sun_security_pkcs11_Secmod_nssLoadLibrary 60 (JNIEnv *env, jclass thisClass, jstring jLibName) 61 { 62 void *hModule; 63 const char *libName = (*env)->GetStringUTFChars(env, jLibName, NULL); 64 65 dprintf1("-lib %s\n", libName); 66 hModule = dlopen(libName, RTLD_LAZY); 67 (*env)->ReleaseStringUTFChars(env, jLibName, libName); 68 dprintf2("-handle: %u (0X%X)\n", hModule, hModule); 69 70 if (hModule == NULL) { 71 throwIOException(env, dlerror()); 72 return 0; 73 } 74 75 return ptr_to_jlong(hModule); 76 }