1/*
2 * Copyright (C) 2017 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 ATRACE_TAG ATRACE_TAG_PACKAGE_MANAGER
18
19#include "VoldNativeService.h"
20#include "Benchmark.h"
21#include "CheckEncryption.h"
22#include "IdleMaint.h"
23#include "MoveStorage.h"
24#include "Process.h"
25#include "VolumeManager.h"
26
27#include "cryptfs.h"
28#include "Ext4Crypt.h"
29#include "MetadataCrypt.h"
30
31#include <fstream>
32#include <thread>
33
34#include <android-base/logging.h>
35#include <android-base/stringprintf.h>
36#include <android-base/strings.h>
37#include <ext4_utils/ext4_crypt.h>
38#include <fs_mgr.h>
39#include <private/android_filesystem_config.h>
40#include <utils/Trace.h>
41
42using android::base::StringPrintf;
43using std::endl;
44
45namespace android {
46namespace vold {
47
48namespace {
49
50constexpr const char* kDump = "android.permission.DUMP";
51
52static binder::Status ok() {
53    return binder::Status::ok();
54}
55
56static binder::Status exception(uint32_t code, const std::string& msg) {
57    return binder::Status::fromExceptionCode(code, String8(msg.c_str()));
58}
59
60static binder::Status error(const std::string& msg) {
61    PLOG(ERROR) << msg;
62    return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str()));
63}
64
65static binder::Status translate(int status) {
66    if (status == 0) {
67        return binder::Status::ok();
68    } else {
69        return binder::Status::fromServiceSpecificError(status);
70    }
71}
72
73static binder::Status translateBool(bool status) {
74    if (status) {
75        return binder::Status::ok();
76    } else {
77        return binder::Status::fromServiceSpecificError(status);
78    }
79}
80
81binder::Status checkPermission(const char* permission) {
82    pid_t pid;
83    uid_t uid;
84
85    if (checkCallingPermission(String16(permission), reinterpret_cast<int32_t*>(&pid),
86            reinterpret_cast<int32_t*>(&uid))) {
87        return ok();
88    } else {
89        return exception(binder::Status::EX_SECURITY,
90                StringPrintf("UID %d / PID %d lacks permission %s", uid, pid, permission));
91    }
92}
93
94binder::Status checkUid(uid_t expectedUid) {
95    uid_t uid = IPCThreadState::self()->getCallingUid();
96    if (uid == expectedUid || uid == AID_ROOT) {
97        return ok();
98    } else {
99        return exception(binder::Status::EX_SECURITY,
100                StringPrintf("UID %d is not expected UID %d", uid, expectedUid));
101    }
102}
103
104binder::Status checkArgumentId(const std::string& id) {
105    if (id.empty()) {
106        return exception(binder::Status::EX_ILLEGAL_ARGUMENT, "Missing ID");
107    }
108    for (const char& c : id) {
109        if (!std::isalnum(c) && c != ':' && c != ',') {
110            return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
111                    StringPrintf("ID %s is malformed", id.c_str()));
112        }
113    }
114    return ok();
115}
116
117binder::Status checkArgumentPath(const std::string& path) {
118    if (path.empty()) {
119        return exception(binder::Status::EX_ILLEGAL_ARGUMENT, "Missing path");
120    }
121    if (path[0] != '/') {
122        return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
123                StringPrintf("Path %s is relative", path.c_str()));
124    }
125    if ((path + '/').find("/../") != std::string::npos) {
126        return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
127                StringPrintf("Path %s is shady", path.c_str()));
128    }
129    for (const char& c : path) {
130        if (c == '\0' || c == '\n') {
131            return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
132                    StringPrintf("Path %s is malformed", path.c_str()));
133        }
134    }
135    return ok();
136}
137
138binder::Status checkArgumentHex(const std::string& hex) {
139    // Empty hex strings are allowed
140    for (const char& c : hex) {
141        if (!std::isxdigit(c) && c != ':' && c != '-') {
142            return exception(binder::Status::EX_ILLEGAL_ARGUMENT,
143                    StringPrintf("Hex %s is malformed", hex.c_str()));
144        }
145    }
146    return ok();
147}
148
149#define ENFORCE_UID(uid) {                                  \
150    binder::Status status = checkUid((uid));                \
151    if (!status.isOk()) {                                   \
152        return status;                                      \
153    }                                                       \
154}
155
156#define CHECK_ARGUMENT_ID(id) {                             \
157    binder::Status status = checkArgumentId((id));          \
158    if (!status.isOk()) {                                   \
159        return status;                                      \
160    }                                                       \
161}
162
163#define CHECK_ARGUMENT_PATH(path) {                         \
164    binder::Status status = checkArgumentPath((path));      \
165    if (!status.isOk()) {                                   \
166        return status;                                      \
167    }                                                       \
168}
169
170#define CHECK_ARGUMENT_HEX(hex) {                           \
171    binder::Status status = checkArgumentHex((hex));        \
172    if (!status.isOk()) {                                   \
173        return status;                                      \
174    }                                                       \
175}
176
177#define ACQUIRE_LOCK \
178    std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getLock()); \
179    ATRACE_CALL();
180
181#define ACQUIRE_CRYPT_LOCK \
182    std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getCryptLock()); \
183    ATRACE_CALL();
184
185}  // namespace
186
187status_t VoldNativeService::start() {
188    IPCThreadState::self()->disableBackgroundScheduling(true);
189    status_t ret = BinderService<VoldNativeService>::publish();
190    if (ret != android::OK) {
191        return ret;
192    }
193    sp<ProcessState> ps(ProcessState::self());
194    ps->startThreadPool();
195    ps->giveThreadPoolName();
196    return android::OK;
197}
198
199status_t VoldNativeService::dump(int fd, const Vector<String16> & /* args */) {
200    auto out = std::fstream(StringPrintf("/proc/self/fd/%d", fd));
201    const binder::Status dump_permission = checkPermission(kDump);
202    if (!dump_permission.isOk()) {
203        out << dump_permission.toString8() << endl;
204        return PERMISSION_DENIED;
205    }
206
207    ACQUIRE_LOCK;
208    out << "vold is happy!" << endl;
209    out.flush();
210    return NO_ERROR;
211}
212
213binder::Status VoldNativeService::setListener(
214        const android::sp<android::os::IVoldListener>& listener) {
215    ENFORCE_UID(AID_SYSTEM);
216    ACQUIRE_LOCK;
217
218    VolumeManager::Instance()->setListener(listener);
219    return ok();
220}
221
222binder::Status VoldNativeService::monitor() {
223    ENFORCE_UID(AID_SYSTEM);
224
225    // Simply acquire/release each lock for watchdog
226    {
227        ACQUIRE_LOCK;
228    }
229    {
230        ACQUIRE_CRYPT_LOCK;
231    }
232
233    return ok();
234}
235
236binder::Status VoldNativeService::reset() {
237    ENFORCE_UID(AID_SYSTEM);
238    ACQUIRE_LOCK;
239
240    return translate(VolumeManager::Instance()->reset());
241}
242
243binder::Status VoldNativeService::shutdown() {
244    ENFORCE_UID(AID_SYSTEM);
245    ACQUIRE_LOCK;
246
247    return translate(VolumeManager::Instance()->shutdown());
248}
249
250binder::Status VoldNativeService::onUserAdded(int32_t userId, int32_t userSerial) {
251    ENFORCE_UID(AID_SYSTEM);
252    ACQUIRE_LOCK;
253
254    return translate(VolumeManager::Instance()->onUserAdded(userId, userSerial));
255}
256
257binder::Status VoldNativeService::onUserRemoved(int32_t userId) {
258    ENFORCE_UID(AID_SYSTEM);
259    ACQUIRE_LOCK;
260
261    return translate(VolumeManager::Instance()->onUserRemoved(userId));
262}
263
264binder::Status VoldNativeService::onUserStarted(int32_t userId) {
265    ENFORCE_UID(AID_SYSTEM);
266    ACQUIRE_LOCK;
267
268    return translate(VolumeManager::Instance()->onUserStarted(userId));
269}
270
271binder::Status VoldNativeService::onUserStopped(int32_t userId) {
272    ENFORCE_UID(AID_SYSTEM);
273    ACQUIRE_LOCK;
274
275    return translate(VolumeManager::Instance()->onUserStopped(userId));
276}
277
278binder::Status VoldNativeService::onSecureKeyguardStateChanged(bool isShowing) {
279    ENFORCE_UID(AID_SYSTEM);
280    ACQUIRE_LOCK;
281
282    return translate(VolumeManager::Instance()->onSecureKeyguardStateChanged(isShowing));
283}
284
285binder::Status VoldNativeService::partition(const std::string& diskId, int32_t partitionType,
286        int32_t ratio) {
287    ENFORCE_UID(AID_SYSTEM);
288    CHECK_ARGUMENT_ID(diskId);
289    ACQUIRE_LOCK;
290
291    auto disk = VolumeManager::Instance()->findDisk(diskId);
292    if (disk == nullptr) {
293        return error("Failed to find disk " + diskId);
294    }
295    switch (partitionType) {
296    case PARTITION_TYPE_PUBLIC: return translate(disk->partitionPublic());
297    case PARTITION_TYPE_PRIVATE: return translate(disk->partitionPrivate());
298    case PARTITION_TYPE_MIXED: return translate(disk->partitionMixed(ratio));
299    default: return error("Unknown type " + std::to_string(partitionType));
300    }
301}
302
303binder::Status VoldNativeService::forgetPartition(const std::string& partGuid,
304        const std::string& fsUuid) {
305    ENFORCE_UID(AID_SYSTEM);
306    CHECK_ARGUMENT_HEX(partGuid);
307    CHECK_ARGUMENT_HEX(fsUuid);
308    ACQUIRE_LOCK;
309
310    return translate(VolumeManager::Instance()->forgetPartition(partGuid, fsUuid));
311}
312
313binder::Status VoldNativeService::mount(const std::string& volId, int32_t mountFlags,
314        int32_t mountUserId) {
315    ENFORCE_UID(AID_SYSTEM);
316    CHECK_ARGUMENT_ID(volId);
317    ACQUIRE_LOCK;
318
319    auto vol = VolumeManager::Instance()->findVolume(volId);
320    if (vol == nullptr) {
321        return error("Failed to find volume " + volId);
322    }
323
324    vol->setMountFlags(mountFlags);
325    vol->setMountUserId(mountUserId);
326
327    int res = vol->mount();
328    if ((mountFlags & MOUNT_FLAG_PRIMARY) != 0) {
329        VolumeManager::Instance()->setPrimary(vol);
330    }
331    return translate(res);
332}
333
334binder::Status VoldNativeService::unmount(const std::string& volId) {
335    ENFORCE_UID(AID_SYSTEM);
336    CHECK_ARGUMENT_ID(volId);
337    ACQUIRE_LOCK;
338
339    auto vol = VolumeManager::Instance()->findVolume(volId);
340    if (vol == nullptr) {
341        return error("Failed to find volume " + volId);
342    }
343    return translate(vol->unmount());
344}
345
346binder::Status VoldNativeService::format(const std::string& volId, const std::string& fsType) {
347    ENFORCE_UID(AID_SYSTEM);
348    CHECK_ARGUMENT_ID(volId);
349    ACQUIRE_LOCK;
350
351    auto vol = VolumeManager::Instance()->findVolume(volId);
352    if (vol == nullptr) {
353        return error("Failed to find volume " + volId);
354    }
355    return translate(vol->format(fsType));
356}
357
358static binder::Status pathForVolId(const std::string& volId, std::string* path) {
359    if (volId == "private" || volId == "null") {
360        *path = "/data";
361    } else {
362        auto vol = VolumeManager::Instance()->findVolume(volId);
363        if (vol == nullptr) {
364            return error("Failed to find volume " + volId);
365        }
366        if (vol->getType() != VolumeBase::Type::kPrivate) {
367            return error("Volume " + volId + " not private");
368        }
369        if (vol->getState() != VolumeBase::State::kMounted) {
370            return error("Volume " + volId + " not mounted");
371        }
372        *path = vol->getPath();
373        if (path->empty()) {
374            return error("Volume " + volId + " missing path");
375        }
376    }
377    return ok();
378}
379
380binder::Status VoldNativeService::benchmark(
381    const std::string& volId, const android::sp<android::os::IVoldTaskListener>& listener) {
382    ENFORCE_UID(AID_SYSTEM);
383    CHECK_ARGUMENT_ID(volId);
384    ACQUIRE_LOCK;
385
386    std::string path;
387    auto status = pathForVolId(volId, &path);
388    if (!status.isOk()) return status;
389
390    std::thread([=]() {
391        android::vold::Benchmark(path, listener);
392    }).detach();
393    return ok();
394}
395
396binder::Status VoldNativeService::checkEncryption(const std::string& volId) {
397    ENFORCE_UID(AID_SYSTEM);
398    CHECK_ARGUMENT_ID(volId);
399    ACQUIRE_LOCK;
400
401    std::string path;
402    auto status = pathForVolId(volId, &path);
403    if (!status.isOk()) return status;
404    return translate(android::vold::CheckEncryption(path));
405}
406
407binder::Status VoldNativeService::moveStorage(const std::string& fromVolId,
408        const std::string& toVolId, const android::sp<android::os::IVoldTaskListener>& listener) {
409    ENFORCE_UID(AID_SYSTEM);
410    CHECK_ARGUMENT_ID(fromVolId);
411    CHECK_ARGUMENT_ID(toVolId);
412    ACQUIRE_LOCK;
413
414    auto fromVol = VolumeManager::Instance()->findVolume(fromVolId);
415    auto toVol = VolumeManager::Instance()->findVolume(toVolId);
416    if (fromVol == nullptr) {
417        return error("Failed to find volume " + fromVolId);
418    } else if (toVol == nullptr) {
419        return error("Failed to find volume " + toVolId);
420    }
421
422    std::thread([=]() {
423        android::vold::MoveStorage(fromVol, toVol, listener);
424    }).detach();
425    return ok();
426}
427
428binder::Status VoldNativeService::remountUid(int32_t uid, int32_t remountMode) {
429    ENFORCE_UID(AID_SYSTEM);
430    ACQUIRE_LOCK;
431
432    std::string tmp;
433    switch (remountMode) {
434    case REMOUNT_MODE_NONE: tmp = "none"; break;
435    case REMOUNT_MODE_DEFAULT: tmp = "default"; break;
436    case REMOUNT_MODE_READ: tmp = "read"; break;
437    case REMOUNT_MODE_WRITE: tmp = "write"; break;
438    default: return error("Unknown mode " + std::to_string(remountMode));
439    }
440    return translate(VolumeManager::Instance()->remountUid(uid, tmp));
441}
442
443binder::Status VoldNativeService::mkdirs(const std::string& path) {
444    ENFORCE_UID(AID_SYSTEM);
445    CHECK_ARGUMENT_PATH(path);
446    ACQUIRE_LOCK;
447
448    return translate(VolumeManager::Instance()->mkdirs(path));
449}
450
451binder::Status VoldNativeService::createObb(const std::string& sourcePath,
452        const std::string& sourceKey, int32_t ownerGid, std::string* _aidl_return) {
453    ENFORCE_UID(AID_SYSTEM);
454    CHECK_ARGUMENT_PATH(sourcePath);
455    CHECK_ARGUMENT_HEX(sourceKey);
456    ACQUIRE_LOCK;
457
458    return translate(
459            VolumeManager::Instance()->createObb(sourcePath, sourceKey, ownerGid, _aidl_return));
460}
461
462binder::Status VoldNativeService::destroyObb(const std::string& volId) {
463    ENFORCE_UID(AID_SYSTEM);
464    CHECK_ARGUMENT_ID(volId);
465    ACQUIRE_LOCK;
466
467    return translate(VolumeManager::Instance()->destroyObb(volId));
468}
469
470binder::Status VoldNativeService::fstrim(int32_t fstrimFlags,
471        const android::sp<android::os::IVoldTaskListener>& listener) {
472    ENFORCE_UID(AID_SYSTEM);
473    ACQUIRE_LOCK;
474
475    std::thread([=]() {
476        android::vold::Trim(listener);
477    }).detach();
478    return ok();
479}
480
481binder::Status VoldNativeService::runIdleMaint(
482        const android::sp<android::os::IVoldTaskListener>& listener) {
483    ENFORCE_UID(AID_SYSTEM);
484    ACQUIRE_LOCK;
485
486    std::thread([=]() {
487        android::vold::RunIdleMaint(listener);
488    }).detach();
489    return ok();
490}
491
492binder::Status VoldNativeService::abortIdleMaint(
493        const android::sp<android::os::IVoldTaskListener>& listener) {
494    ENFORCE_UID(AID_SYSTEM);
495    ACQUIRE_LOCK;
496
497    std::thread([=]() {
498        android::vold::AbortIdleMaint(listener);
499    }).detach();
500    return ok();
501}
502
503binder::Status VoldNativeService::mountAppFuse(int32_t uid, int32_t pid, int32_t mountId,
504        android::base::unique_fd* _aidl_return) {
505    ENFORCE_UID(AID_SYSTEM);
506    ACQUIRE_LOCK;
507
508    return translate(VolumeManager::Instance()->mountAppFuse(uid, pid, mountId, _aidl_return));
509}
510
511binder::Status VoldNativeService::unmountAppFuse(int32_t uid, int32_t pid, int32_t mountId) {
512    ENFORCE_UID(AID_SYSTEM);
513    ACQUIRE_LOCK;
514
515    return translate(VolumeManager::Instance()->unmountAppFuse(uid, pid, mountId));
516}
517
518binder::Status VoldNativeService::fdeCheckPassword(const std::string& password) {
519    ENFORCE_UID(AID_SYSTEM);
520    ACQUIRE_CRYPT_LOCK;
521
522    return translate(cryptfs_check_passwd(password.c_str()));
523}
524
525binder::Status VoldNativeService::fdeRestart() {
526    ENFORCE_UID(AID_SYSTEM);
527    ACQUIRE_CRYPT_LOCK;
528
529    // Spawn as thread so init can issue commands back to vold without
530    // causing deadlock, usually as a result of prep_data_fs.
531    std::thread(&cryptfs_restart).detach();
532    return ok();
533}
534
535binder::Status VoldNativeService::fdeComplete(int32_t* _aidl_return) {
536    ENFORCE_UID(AID_SYSTEM);
537    ACQUIRE_CRYPT_LOCK;
538
539    *_aidl_return = cryptfs_crypto_complete();
540    return ok();
541}
542
543static int fdeEnableInternal(int32_t passwordType, const std::string& password,
544        int32_t encryptionFlags) {
545    bool noUi = (encryptionFlags & VoldNativeService::ENCRYPTION_FLAG_NO_UI) != 0;
546
547    for (int tries = 0; tries < 2; ++tries) {
548        int rc;
549        if (passwordType == VoldNativeService::PASSWORD_TYPE_DEFAULT) {
550            rc = cryptfs_enable_default(noUi);
551        } else {
552            rc = cryptfs_enable(passwordType, password.c_str(), noUi);
553        }
554
555        if (rc == 0) {
556            return 0;
557        } else if (tries == 0) {
558            KillProcessesWithOpenFiles(DATA_MNT_POINT, SIGKILL);
559        }
560    }
561
562    return -1;
563}
564
565binder::Status VoldNativeService::fdeEnable(int32_t passwordType,
566        const std::string& password, int32_t encryptionFlags) {
567    ENFORCE_UID(AID_SYSTEM);
568    ACQUIRE_CRYPT_LOCK;
569
570    LOG(DEBUG) << "fdeEnable(" << passwordType << ", *, " << encryptionFlags << ")";
571    if (e4crypt_is_native()) {
572        LOG(ERROR) << "e4crypt_is_native, fdeEnable invalid";
573        return error("e4crypt_is_native, fdeEnable invalid");
574    }
575    LOG(DEBUG) << "!e4crypt_is_native, spawning fdeEnableInternal";
576
577    // Spawn as thread so init can issue commands back to vold without
578    // causing deadlock, usually as a result of prep_data_fs.
579    std::thread(&fdeEnableInternal, passwordType, password, encryptionFlags).detach();
580    return ok();
581}
582
583binder::Status VoldNativeService::fdeChangePassword(int32_t passwordType,
584        const std::string& password) {
585    ENFORCE_UID(AID_SYSTEM);
586    ACQUIRE_CRYPT_LOCK;
587
588    return translate(cryptfs_changepw(passwordType, password.c_str()));
589}
590
591binder::Status VoldNativeService::fdeVerifyPassword(const std::string& password) {
592    ENFORCE_UID(AID_SYSTEM);
593    ACQUIRE_CRYPT_LOCK;
594
595    return translate(cryptfs_verify_passwd(password.c_str()));
596}
597
598binder::Status VoldNativeService::fdeGetField(const std::string& key,
599        std::string* _aidl_return) {
600    ENFORCE_UID(AID_SYSTEM);
601    ACQUIRE_CRYPT_LOCK;
602
603    char buf[PROPERTY_VALUE_MAX];
604    if (cryptfs_getfield(key.c_str(), buf, sizeof(buf)) != CRYPTO_GETFIELD_OK) {
605        return error(StringPrintf("Failed to read field %s", key.c_str()));
606    } else {
607        *_aidl_return = buf;
608        return ok();
609    }
610}
611
612binder::Status VoldNativeService::fdeSetField(const std::string& key,
613        const std::string& value) {
614    ENFORCE_UID(AID_SYSTEM);
615    ACQUIRE_CRYPT_LOCK;
616
617    return translate(cryptfs_setfield(key.c_str(), value.c_str()));
618}
619
620binder::Status VoldNativeService::fdeGetPasswordType(int32_t* _aidl_return) {
621    ENFORCE_UID(AID_SYSTEM);
622    ACQUIRE_CRYPT_LOCK;
623
624    *_aidl_return = cryptfs_get_password_type();
625    return ok();
626}
627
628binder::Status VoldNativeService::fdeGetPassword(std::string* _aidl_return) {
629    ENFORCE_UID(AID_SYSTEM);
630    ACQUIRE_CRYPT_LOCK;
631
632    const char* res = cryptfs_get_password();
633    if (res != nullptr) {
634        *_aidl_return = res;
635    }
636    return ok();
637}
638
639binder::Status VoldNativeService::fdeClearPassword() {
640    ENFORCE_UID(AID_SYSTEM);
641    ACQUIRE_CRYPT_LOCK;
642
643    cryptfs_clear_password();
644    return ok();
645}
646
647binder::Status VoldNativeService::fbeEnable() {
648    ENFORCE_UID(AID_SYSTEM);
649    ACQUIRE_CRYPT_LOCK;
650
651    return translateBool(e4crypt_initialize_global_de());
652}
653
654binder::Status VoldNativeService::mountDefaultEncrypted() {
655    ENFORCE_UID(AID_SYSTEM);
656    ACQUIRE_CRYPT_LOCK;
657
658    if (!e4crypt_is_native()) {
659        // Spawn as thread so init can issue commands back to vold without
660        // causing deadlock, usually as a result of prep_data_fs.
661        std::thread(&cryptfs_mount_default_encrypted).detach();
662    }
663    return ok();
664}
665
666binder::Status VoldNativeService::initUser0() {
667    ENFORCE_UID(AID_SYSTEM);
668    ACQUIRE_CRYPT_LOCK;
669
670    return translateBool(e4crypt_init_user0());
671}
672
673binder::Status VoldNativeService::isConvertibleToFbe(bool* _aidl_return) {
674    ENFORCE_UID(AID_SYSTEM);
675    ACQUIRE_CRYPT_LOCK;
676
677    *_aidl_return = cryptfs_isConvertibleToFBE() != 0;
678    return ok();
679}
680
681binder::Status VoldNativeService::mountFstab(const std::string& mountPoint) {
682    ENFORCE_UID(AID_SYSTEM);
683    ACQUIRE_LOCK;
684
685    return translateBool(e4crypt_mount_metadata_encrypted(mountPoint, false));
686}
687
688binder::Status VoldNativeService::encryptFstab(const std::string& mountPoint) {
689    ENFORCE_UID(AID_SYSTEM);
690    ACQUIRE_LOCK;
691
692    return translateBool(e4crypt_mount_metadata_encrypted(mountPoint, true));
693}
694
695binder::Status VoldNativeService::createUserKey(int32_t userId, int32_t userSerial,
696        bool ephemeral) {
697    ENFORCE_UID(AID_SYSTEM);
698    ACQUIRE_CRYPT_LOCK;
699
700    return translateBool(e4crypt_vold_create_user_key(userId, userSerial, ephemeral));
701}
702
703binder::Status VoldNativeService::destroyUserKey(int32_t userId) {
704    ENFORCE_UID(AID_SYSTEM);
705    ACQUIRE_CRYPT_LOCK;
706
707    return translateBool(e4crypt_destroy_user_key(userId));
708}
709
710binder::Status VoldNativeService::addUserKeyAuth(int32_t userId, int32_t userSerial,
711        const std::string& token, const std::string& secret) {
712    ENFORCE_UID(AID_SYSTEM);
713    ACQUIRE_CRYPT_LOCK;
714
715    return translateBool(e4crypt_add_user_key_auth(userId, userSerial, token, secret));
716}
717
718binder::Status VoldNativeService::fixateNewestUserKeyAuth(int32_t userId) {
719    ENFORCE_UID(AID_SYSTEM);
720    ACQUIRE_CRYPT_LOCK;
721
722    return translateBool(e4crypt_fixate_newest_user_key_auth(userId));
723}
724
725binder::Status VoldNativeService::unlockUserKey(int32_t userId, int32_t userSerial,
726        const std::string& token, const std::string& secret) {
727    ENFORCE_UID(AID_SYSTEM);
728    ACQUIRE_CRYPT_LOCK;
729
730    return translateBool(e4crypt_unlock_user_key(userId, userSerial, token, secret));
731}
732
733binder::Status VoldNativeService::lockUserKey(int32_t userId) {
734    ENFORCE_UID(AID_SYSTEM);
735    ACQUIRE_CRYPT_LOCK;
736
737    return translateBool(e4crypt_lock_user_key(userId));
738}
739
740binder::Status VoldNativeService::prepareUserStorage(const std::unique_ptr<std::string>& uuid,
741        int32_t userId, int32_t userSerial, int32_t flags) {
742    ENFORCE_UID(AID_SYSTEM);
743    std::string empty_string = "";
744    auto uuid_ = uuid ? *uuid : empty_string;
745    CHECK_ARGUMENT_HEX(uuid_);
746
747    ACQUIRE_CRYPT_LOCK;
748    return translateBool(e4crypt_prepare_user_storage(uuid_, userId, userSerial, flags));
749}
750
751binder::Status VoldNativeService::destroyUserStorage(const std::unique_ptr<std::string>& uuid,
752        int32_t userId, int32_t flags) {
753    ENFORCE_UID(AID_SYSTEM);
754    std::string empty_string = "";
755    auto uuid_ = uuid ? *uuid : empty_string;
756    CHECK_ARGUMENT_HEX(uuid_);
757
758    ACQUIRE_CRYPT_LOCK;
759    return translateBool(e4crypt_destroy_user_storage(uuid_, userId, flags));
760}
761
762}  // namespace vold
763}  // namespace android
764