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android_system_vold
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Fingerprint data is now stored in one of two ways depending on the

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shipping API version:

For devices shipped before Android P nothing changes, data
is stored under /data/system/users/<user-id>/fpdata/...

Devices shipped from now on will instead store
fingerprint data under /data/vendor_de/<user-id>/fpdata.

Support for /data/vendor_de and /data/vendor_ce has been added to vold.

Bug: 36997597
Change-Id: I615e90d1c9ab08e768a8713968fa043598a0a526
Test: manually
gugelfrei
Andreas Huber 6 years ago
parent 9929e7db32
commit 71cd43f434
4 changed files with 33 additions and 0 deletions
Show Stats Download Patch File Download Diff File

10
Ext4Crypt.cpp
Unescape View File

@ -663,6 +663,7 @@ bool e4crypt_prepare_user_storage(const std::string& volume_uuid, userid_t user_
// DE_n key
auto system_de_path = android::vold::BuildDataSystemDePath(user_id);
auto misc_de_path = android::vold::BuildDataMiscDePath(user_id);
auto vendor_de_path = android::vold::BuildDataVendorDePath(user_id);
auto user_de_path = android::vold::BuildDataUserDePath(volume_uuid, user_id);
if (volume_uuid.empty()) {
@ -675,6 +676,7 @@ bool e4crypt_prepare_user_storage(const std::string& volume_uuid, userid_t user_
if (!prepare_dir(system_de_path, 0770, AID_SYSTEM, AID_SYSTEM)) return false;
if (!prepare_dir(misc_de_path, 01771, AID_SYSTEM, AID_MISC)) return false;
if (!prepare_dir(vendor_de_path, 0771, AID_ROOT, AID_ROOT)) return false;
}
if (!prepare_dir(user_de_path, 0771, AID_SYSTEM, AID_SYSTEM)) return false;
@ -685,6 +687,7 @@ bool e4crypt_prepare_user_storage(const std::string& volume_uuid, userid_t user_
get_data_file_encryption_modes(&de_ref);
if (!ensure_policy(de_ref, system_de_path)) return false;
if (!ensure_policy(de_ref, misc_de_path)) return false;
if (!ensure_policy(de_ref, vendor_de_path)) return false;
} else {
if (!read_or_create_volkey(misc_de_path, volume_uuid, &de_ref)) return false;
}
@ -696,12 +699,14 @@ bool e4crypt_prepare_user_storage(const std::string& volume_uuid, userid_t user_
// CE_n key
auto system_ce_path = android::vold::BuildDataSystemCePath(user_id);
auto misc_ce_path = android::vold::BuildDataMiscCePath(user_id);
auto vendor_ce_path = android::vold::BuildDataVendorCePath(user_id);
auto media_ce_path = android::vold::BuildDataMediaCePath(volume_uuid, user_id);
auto user_ce_path = android::vold::BuildDataUserCePath(volume_uuid, user_id);
if (volume_uuid.empty()) {
if (!prepare_dir(system_ce_path, 0770, AID_SYSTEM, AID_SYSTEM)) return false;
if (!prepare_dir(misc_ce_path, 01771, AID_SYSTEM, AID_MISC)) return false;
if (!prepare_dir(vendor_ce_path, 0771, AID_ROOT, AID_ROOT)) return false;
}
if (!prepare_dir(media_ce_path, 0770, AID_MEDIA_RW, AID_MEDIA_RW)) return false;
if (!prepare_dir(user_ce_path, 0771, AID_SYSTEM, AID_SYSTEM)) return false;
@ -713,6 +718,7 @@ bool e4crypt_prepare_user_storage(const std::string& volume_uuid, userid_t user_
get_data_file_encryption_modes(&ce_ref);
if (!ensure_policy(ce_ref, system_ce_path)) return false;
if (!ensure_policy(ce_ref, misc_ce_path)) return false;
if (!ensure_policy(ce_ref, vendor_ce_path)) return false;
} else {
if (!read_or_create_volkey(misc_ce_path, volume_uuid, &ce_ref)) return false;
@ -745,6 +751,7 @@ bool e4crypt_destroy_user_storage(const std::string& volume_uuid, userid_t user_
// CE_n key
auto system_ce_path = android::vold::BuildDataSystemCePath(user_id);
auto misc_ce_path = android::vold::BuildDataMiscCePath(user_id);
auto vendor_ce_path = android::vold::BuildDataVendorCePath(user_id);
auto media_ce_path = android::vold::BuildDataMediaCePath(volume_uuid, user_id);
auto user_ce_path = android::vold::BuildDataUserCePath(volume_uuid, user_id);
@ -753,6 +760,7 @@ bool e4crypt_destroy_user_storage(const std::string& volume_uuid, userid_t user_
if (volume_uuid.empty()) {
res &= destroy_dir(system_ce_path);
res &= destroy_dir(misc_ce_path);
res &= destroy_dir(vendor_ce_path);
} else {
if (e4crypt_is_native()) {
res &= destroy_volkey(misc_ce_path, volume_uuid);
@ -769,6 +777,7 @@ bool e4crypt_destroy_user_storage(const std::string& volume_uuid, userid_t user_
// DE_n key
auto system_de_path = android::vold::BuildDataSystemDePath(user_id);
auto misc_de_path = android::vold::BuildDataMiscDePath(user_id);
auto vendor_de_path = android::vold::BuildDataVendorDePath(user_id);
auto user_de_path = android::vold::BuildDataUserDePath(volume_uuid, user_id);
res &= destroy_dir(user_de_path);
@ -780,6 +789,7 @@ bool e4crypt_destroy_user_storage(const std::string& volume_uuid, userid_t user_
res &= destroy_dir(profiles_de_path);
res &= destroy_dir(system_de_path);
res &= destroy_dir(misc_de_path);
res &= destroy_dir(vendor_de_path);
} else {
if (e4crypt_is_native()) {
res &= destroy_volkey(misc_de_path, volume_uuid);

8
Utils.cpp
Unescape View File

@ -635,6 +635,14 @@ std::string BuildDataProfilesDePath(userid_t userId) {
return StringPrintf("%s/misc/profiles/cur/%u", BuildDataPath("").c_str(), userId);
}
std::string BuildDataVendorCePath(userid_t userId) {
return StringPrintf("%s/vendor_ce/%u", BuildDataPath("").c_str(), userId);
}
std::string BuildDataVendorDePath(userid_t userId) {
return StringPrintf("%s/vendor_de/%u", BuildDataPath("").c_str(), userId);
}
std::string BuildDataPath(const std::string& volumeUuid) {
// TODO: unify with installd path generation logic
if (volumeUuid.empty()) {

2
Utils.h
Unescape View File

@ -107,6 +107,8 @@ std::string BuildDataMiscLegacyPath(userid_t userid);
std::string BuildDataMiscCePath(userid_t userid);
std::string BuildDataMiscDePath(userid_t userid);
std::string BuildDataProfilesDePath(userid_t userid);
std::string BuildDataVendorCePath(userid_t userid);
std::string BuildDataVendorDePath(userid_t userid);
std::string BuildDataPath(const std::string& volumeUuid);
std::string BuildDataMediaCePath(const std::string& volumeUuid, userid_t userid);

13
vold_prepare_subdirs.cpp
Unescape View File

@ -38,6 +38,8 @@
#include "Utils.h"
#include "android/os/IVold.h"
#include <private/android_filesystem_config.h>
static void usage(const char* progname) {
std::cerr << "Usage: " << progname << " [ prepare | destroy ] <volume_uuid> <user_id> <flags>"
<< std::endl;
@ -125,6 +127,11 @@ static bool prepare_subdirs(const std::string& volume_uuid, int user_id, int fla
auto misc_de_path = android::vold::BuildDataMiscDePath(user_id);
if (!prepare_dir(sehandle, 0700, 0, 0, misc_de_path + "/vold")) return false;
if (!prepare_dir(sehandle, 0700, 0, 0, misc_de_path + "/storaged")) return false;
auto vendor_de_path = android::vold::BuildDataVendorDePath(user_id);
if (!prepare_dir(sehandle, 0700, AID_SYSTEM, AID_SYSTEM, vendor_de_path + "/fpdata")) {
return false;
}
}
if (flags & android::os::IVold::STORAGE_FLAG_CE) {
auto misc_ce_path = android::vold::BuildDataMiscCePath(user_id);
@ -141,10 +148,16 @@ static bool destroy_subdirs(const std::string& volume_uuid, int user_id, int fla
if (flags & android::os::IVold::STORAGE_FLAG_CE) {
auto misc_ce_path = android::vold::BuildDataMiscCePath(user_id);
res &= rmrf_contents(misc_ce_path);
auto vendor_ce_path = android::vold::BuildDataVendorCePath(user_id);
res &= rmrf_contents(vendor_ce_path);
}
if (flags & android::os::IVold::STORAGE_FLAG_DE) {
auto misc_de_path = android::vold::BuildDataMiscDePath(user_id);
res &= rmrf_contents(misc_de_path);
auto vendor_de_path = android::vold::BuildDataVendorDePath(user_id);
res &= rmrf_contents(vendor_de_path);
}
}
return res;

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