1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "Scrypt"
18
19 #include <nativehelper/JNIHelp.h>
20 #include "jni.h"
21
22 #include <android_runtime/Log.h>
23 #include <utils/Timers.h>
24 #include <utils/misc.h>
25 #include <utils/String8.h>
26 #include <utils/Log.h>
27
28 extern "C" {
29 #include "crypto_scrypt.h"
30 }
31
32 namespace android {
33
android_security_Scrypt_nativeScrypt(JNIEnv * env,jobject,jbyteArray password,jbyteArray salt,jint N,jint r,jint p,jint outLen)34 static jbyteArray android_security_Scrypt_nativeScrypt(JNIEnv* env, jobject, jbyteArray password, jbyteArray salt, jint N, jint r, jint p, jint outLen) {
35 if (!password || !salt) {
36 return NULL;
37 }
38
39 int passwordLen = env->GetArrayLength(password);
40 int saltLen = env->GetArrayLength(salt);
41 jbyteArray ret = env->NewByteArray(outLen);
42
43 jbyte* passwordPtr = (jbyte*)env->GetByteArrayElements(password, NULL);
44 jbyte* saltPtr = (jbyte*)env->GetByteArrayElements(salt, NULL);
45 jbyte* retPtr = (jbyte*)env->GetByteArrayElements(ret, NULL);
46
47 int rc = crypto_scrypt((const uint8_t *)passwordPtr, passwordLen,
48 (const uint8_t *)saltPtr, saltLen, N, r, p, (uint8_t *)retPtr,
49 outLen);
50 env->ReleaseByteArrayElements(password, passwordPtr, JNI_ABORT);
51 env->ReleaseByteArrayElements(salt, saltPtr, JNI_ABORT);
52 env->ReleaseByteArrayElements(ret, retPtr, 0);
53
54 if (!rc) {
55 return ret;
56 } else {
57 SLOGE("scrypt failed");
58 return NULL;
59 }
60 }
61
62 static const JNINativeMethod sMethods[] = {
63 /* name, signature, funcPtr */
64 {"nativeScrypt", "([B[BIIII)[B", (void*)android_security_Scrypt_nativeScrypt},
65 };
66
register_android_security_Scrypt(JNIEnv * env)67 int register_android_security_Scrypt(JNIEnv* env) {
68 return jniRegisterNativeMethods(env, "android/security/Scrypt",
69 sMethods, NELEM(sMethods));
70 }
71
72 } /* namespace android */
73