1 /*
2 * Copyright (c) 2002, 2011, 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
42 *
43 */
44 JNIEXPORT jboolean JNICALL Java_sun_security_provider_NativeSeedGenerator_nativeGenerateSeed
45 (JNIEnv *env, jclass clazz, jbyteArray randArray)
46 {
47 HCRYPTPROV hCryptProv;
48 jboolean result = JNI_FALSE;
49 jsize numBytes;
50 jbyte* randBytes;
51
52 if (CryptAcquireContextA(&hCryptProv, "J2SE", NULL, PROV_RSA_FULL, 0) == FALSE) {
53 /* If CSP context hasn't been created, create one. */
54 if (CryptAcquireContextA(&hCryptProv, "J2SE", NULL, PROV_RSA_FULL,
55 CRYPT_NEWKEYSET) == FALSE) {
56 return result;
57 }
58 }
59
60 numBytes = (*env)->GetArrayLength(env, randArray);
61 randBytes = (*env)->GetByteArrayElements(env, randArray, NULL);
62 if (CryptGenRandom(hCryptProv, numBytes, randBytes)) {
63 result = JNI_TRUE;
64 }
65 (*env)->ReleaseByteArrayElements(env, randArray, randBytes, 0);
66
67 CryptReleaseContext(hCryptProv, 0);
68
69 return result;
70 }
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1 /*
2 * Copyright (c) 2002, 2014, 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
42 *
43 */
44 JNIEXPORT jboolean JNICALL Java_sun_security_provider_NativeSeedGenerator_nativeGenerateSeed
45 (JNIEnv *env, jclass clazz, jbyteArray randArray)
46 {
47 HCRYPTPROV hCryptProv;
48 jboolean result = JNI_FALSE;
49 jsize numBytes;
50 jbyte* randBytes;
51
52 if (CryptAcquireContextA(&hCryptProv, "J2SE", NULL, PROV_RSA_FULL, 0) == FALSE) {
53 /* If CSP context hasn't been created, create one. */
54 if (CryptAcquireContextA(&hCryptProv, "J2SE", NULL, PROV_RSA_FULL,
55 CRYPT_NEWKEYSET) == FALSE) {
56 return result;
57 }
58 }
59
60 numBytes = (*env)->GetArrayLength(env, randArray);
61 randBytes = (*env)->GetByteArrayElements(env, randArray, NULL);
62 if (randBytes == NULL) {
63 goto cleanup;
64 }
65
66 if (CryptGenRandom(hCryptProv, numBytes, randBytes)) {
67 result = JNI_TRUE;
68 }
69 (*env)->ReleaseByteArrayElements(env, randArray, randBytes, 0);
70
71 cleanup:
72 CryptReleaseContext(hCryptProv, 0);
73
74 return result;
75 }
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