0N/A/*
2362N/A * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/* Need to define this to get CAPI functions included */
0N/A#ifndef _WIN32_WINNT
0N/A#define _WIN32_WINNT 0x0400
0N/A#endif
0N/A
0N/A#include <windows.h>
0N/A#include <wincrypt.h>
0N/A#include <jni.h>
0N/A#include "sun_security_provider_NativeSeedGenerator.h"
0N/A
0N/A/*
0N/A * Get a random seed from the MS CryptoAPI. Return true if successful, false
0N/A * otherwise.
0N/A *
0N/A * Some early versions of Windows 95 do not support the required functions.
0N/A * Use runtime linking to avoid problems.
0N/A *
0N/A */
0N/AJNIEXPORT jboolean JNICALL Java_sun_security_provider_NativeSeedGenerator_nativeGenerateSeed
0N/A (JNIEnv *env, jclass clazz, jbyteArray randArray)
0N/A{
0N/A HCRYPTPROV hCryptProv;
0N/A jboolean result = JNI_FALSE;
0N/A jsize numBytes;
0N/A jbyte* randBytes;
0N/A
3901N/A if (CryptAcquireContextA(&hCryptProv, "J2SE", NULL, PROV_RSA_FULL, 0) == FALSE) {
0N/A /* If CSP context hasn't been created, create one. */
3901N/A if (CryptAcquireContextA(&hCryptProv, "J2SE", NULL, PROV_RSA_FULL,
0N/A CRYPT_NEWKEYSET) == FALSE) {
0N/A return result;
0N/A }
0N/A }
0N/A
0N/A numBytes = (*env)->GetArrayLength(env, randArray);
0N/A randBytes = (*env)->GetByteArrayElements(env, randArray, NULL);
3901N/A if (CryptGenRandom(hCryptProv, numBytes, randBytes)) {
0N/A result = JNI_TRUE;
0N/A }
0N/A (*env)->ReleaseByteArrayElements(env, randArray, randBytes, 0);
0N/A
3901N/A CryptReleaseContext(hCryptProv, 0);
0N/A
0N/A return result;
0N/A}