--- /dev/null 2014-11-21 16:40:26.217363000 +0100 +++ new/src/java.base/windows/native/libjava/SystemRandomImpl_md.c 2014-12-04 18:21:55.556924940 +0100 @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2014, 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 + +#include +#include "jni_util.h" +#include "sun_misc_SystemRandomImpl.h" + +static BOOLEAN (APIENTRY *rtlGenRandomFn)(void*, ULONG) = 0; + +/* + * Load library (increment reference count), obtain the rtlGenRandomFn + * function pointer and return a library handle + */ +JNIEXPORT jlong JNICALL Java_sun_misc_SystemRandomImpl_init0 + (JNIEnv *env, jclass clazz) +{ + HMODULE hLib = LoadLibraryA("ADVAPI32.DLL"); + if (!hLib) { + JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", "Can't load ADVAPI32.DLL"); + return 0; + } + + if (!rtlGenRandomFn) { + rtlGenRandomFn = (BOOLEAN (APIENTRY *)(void*,ULONG))GetProcAddress(hLib, "SystemFunction036"); + } + + if (!rtlGenRandomFn) { + FreeLibrary(hLib); + JNU_ThrowByName(env, "java/lang/UnsupportedOperationException", "Can't obtain ADVAPI32!RtlGenRandom function."); + return 0; + } + + return (jlong)hLib; +} + +/* + * Obtain random bytes + */ +JNIEXPORT void JNICALL Java_sun_misc_SystemRandomImpl_getBytes0 + (JNIEnv *env, jclass clazz, jbyteArray randArray) +{ + jsize numBytes = (*env)->GetArrayLength(env, randArray); + jbyte* randBytes = (*env)->GetByteArrayElements(env, randArray, NULL); + if (randBytes == NULL) { + JNU_ThrowByName(env, "java/lang/RuntimeException", "Can't obtain byte[] elements."); + return; + } + + if (!rtlGenRandomFn(randBytes, numBytes)) { + (*env)->ReleaseByteArrayElements(env, randArray, randBytes, 0); + JNU_ThrowByName(env, "java/lang/RuntimeException", "RtlGenRandom function failed."); + return; + } + + (*env)->ReleaseByteArrayElements(env, randArray, randBytes, 0); +} + +/* + * Unload the library (decrement reference count) + */ +JNIEXPORT void JNICALL Java_sun_misc_SystemRandomImpl_deinit0 + (JNIEnv *env, jclass clazz, jlong libraryHandle) +{ + FreeLibrary((HMODULE) libraryHandle); +}