1 /*
2 * Copyright (C) 2016 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 "SyntheticPasswordManager"
18
19 #include "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 #include <gatekeeper/password_handle.h>
28
29
30 extern "C" {
31 #include "crypto_scrypt.h"
32 }
33
34 namespace android {
35
android_server_SyntheticPasswordManager_nativeSidFromPasswordHandle(JNIEnv * env,jobject,jbyteArray handleArray)36 static jlong android_server_SyntheticPasswordManager_nativeSidFromPasswordHandle(JNIEnv* env, jobject, jbyteArray handleArray) {
37
38 jbyte* data = (jbyte*)env->GetPrimitiveArrayCritical(handleArray, NULL);
39
40 if (data != NULL) {
41 const gatekeeper::password_handle_t *handle =
42 reinterpret_cast<const gatekeeper::password_handle_t *>(data);
43 jlong sid = handle->user_id;
44 env->ReleasePrimitiveArrayCritical(handleArray, data, JNI_ABORT);
45 return sid;
46 } else {
47 return 0;
48 }
49 }
50
android_server_SyntheticPasswordManager_nativeScrypt(JNIEnv * env,jobject,jbyteArray password,jbyteArray salt,jint N,jint r,jint p,jint outLen)51 static jbyteArray android_server_SyntheticPasswordManager_nativeScrypt(JNIEnv* env, jobject, jbyteArray password, jbyteArray salt, jint N, jint r, jint p, jint outLen) {
52 if (!password || !salt) {
53 return NULL;
54 }
55
56 int passwordLen = env->GetArrayLength(password);
57 int saltLen = env->GetArrayLength(salt);
58 jbyteArray ret = env->NewByteArray(outLen);
59
60 jbyte* passwordPtr = (jbyte*)env->GetByteArrayElements(password, NULL);
61 jbyte* saltPtr = (jbyte*)env->GetByteArrayElements(salt, NULL);
62 jbyte* retPtr = (jbyte*)env->GetByteArrayElements(ret, NULL);
63
64 int rc = crypto_scrypt((const uint8_t *)passwordPtr, passwordLen,
65 (const uint8_t *)saltPtr, saltLen, N, r, p, (uint8_t *)retPtr,
66 outLen);
67 env->ReleaseByteArrayElements(password, passwordPtr, JNI_ABORT);
68 env->ReleaseByteArrayElements(salt, saltPtr, JNI_ABORT);
69 env->ReleaseByteArrayElements(ret, retPtr, 0);
70
71 if (!rc) {
72 return ret;
73 } else {
74 SLOGE("scrypt failed");
75 return NULL;
76 }
77 }
78
79 static const JNINativeMethod sMethods[] = {
80 /* name, signature, funcPtr */
81 {"nativeSidFromPasswordHandle", "([B)J", (void*)android_server_SyntheticPasswordManager_nativeSidFromPasswordHandle},
82 {"nativeScrypt", "([B[BIIII)[B", (void*)android_server_SyntheticPasswordManager_nativeScrypt},
83 };
84
register_android_server_SyntheticPasswordManager(JNIEnv * env)85 int register_android_server_SyntheticPasswordManager(JNIEnv* env) {
86 return jniRegisterNativeMethods(env, "com/android/server/locksettings/SyntheticPasswordManager",
87 sMethods, NELEM(sMethods));
88 }
89
90 } /* namespace android */
91