Peter Cai
24a646279c
Turns out it is still required -- just that on Android 13 it happened to work fine on devices released on Android 13
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
#include "../../quirks.h"
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#include <android-base/properties.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <cstdlib>
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#include <filesystem>
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#include <map>
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#include <optional>
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#include <string>
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#include <utility>
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using namespace std;
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#define AVB_PROP_OS_VERSION "com.android.build.boot.os_version"
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#define AVB_PROP_SPL "com.android.build.boot.security_patch"
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map<int, string> api_to_version{
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{30, "11"}, {31, "12"}, {32, "12L"},
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{33, "13"}, {34, "14"}
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};
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optional<pair<string, string>> try_get_spl() {
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string boot_part = "/dev/block/by-name/boot" + android::base::GetProperty("ro.boot.slot_suffix", "");
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// Read from AVB footer, https://github.com/TrebleDroid/device_phh_treble/blob/android-13.0/fixSPL/getSPL.c
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// First read into memory
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int fd = open(boot_part.c_str(), O_RDONLY);
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off_t size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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char *buf = (char *) malloc(size);
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read(fd, buf, size);
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// Search for AVB footer property directly in the binary
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char* p = (char *) memmem(buf, size, AVB_PROP_OS_VERSION, sizeof(AVB_PROP_OS_VERSION));
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if (p == nullptr)
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return nullopt;
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p += sizeof(AVB_PROP_OS_VERSION);
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string os_version(p);
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p = (char *) memmem(buf, size, AVB_PROP_SPL, sizeof(AVB_PROP_SPL));
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if (p == nullptr)
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return nullopt;
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p += sizeof(AVB_PROP_SPL);
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string spl(p);
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return make_pair(os_version, spl);
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}
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class MtkTkQuirk : DeviceQuirk {
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public:
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bool ShouldRun() {
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return filesystem::exists("/proc/tkcore/tkcore_log");
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}
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void Run() {
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android::base::SetProperty("debug.phh.props.ice.trustkernel", "keymaster");
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android::base::SetProperty("debug.phh.props.teed", "keymaster");
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android::base::SetProperty("ro.keymaster.brn", "Android");
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android::base::SetProperty("ro.keymaster.mod", "AOSP on ARM64");
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string release = android::base::GetProperty("ro.vendor.build.version.release", "11");
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string spl = android::base::GetProperty("ro.vendor.build.version.security_patch", "2023-01-05");
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auto res = try_get_spl();
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if (res) {
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release = res->first;
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spl = res->second;
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}
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// With GRF, release version from vendor or boot may not be what we need
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int first_api_level = android::base::GetIntProperty("ro.product.first_api_level", 30);
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if (api_to_version.count(first_api_level) > 0) {
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string release_from_first_api = api_to_version[first_api_level];
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if (stoi(release_from_first_api) >= stoi(release)) {
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release = release_from_first_api;
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}
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}
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android::base::SetProperty("ro.keymaster.xxx.release", release);
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android::base::SetProperty("ro.keymaster.xxx.security_patch", spl);
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android::base::SetProperty("ctl.restart", "teed");
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}
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};
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LOAD_QUIRK(MtkTkQuirk)
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