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-rw-r--r--uncrypt/uncrypt.cpp292
-rw-r--r--uncrypt/uncrypt.rc10
2 files changed, 198 insertions, 104 deletions
diff --git a/uncrypt/uncrypt.cpp b/uncrypt/uncrypt.cpp
index 098a7a979..705744eb6 100644
--- a/uncrypt/uncrypt.cpp
+++ b/uncrypt/uncrypt.cpp
@@ -58,6 +58,7 @@
#include <vector>
#include <android-base/file.h>
+#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <cutils/android_reboot.h>
@@ -67,23 +68,25 @@
#define LOG_TAG "uncrypt"
#include <log/log.h>
+#include "bootloader.h"
#include "unique_fd.h"
#define WINDOW_SIZE 5
-static const std::string cache_block_map = "/cache/recovery/block.map";
-static const std::string status_file = "/cache/recovery/uncrypt_status";
-static const std::string uncrypt_file = "/cache/recovery/uncrypt_file";
+static const std::string CACHE_BLOCK_MAP = "/cache/recovery/block.map";
+static const std::string COMMAND_FILE = "/cache/recovery/command";
+static const std::string STATUS_FILE = "/cache/recovery/uncrypt_status";
+static const std::string UNCRYPT_PATH_FILE = "/cache/recovery/uncrypt_file";
static struct fstab* fstab = NULL;
static int write_at_offset(unsigned char* buffer, size_t size, int wfd, off64_t offset) {
if (TEMP_FAILURE_RETRY(lseek64(wfd, offset, SEEK_SET)) == -1) {
- ALOGE("error seeking to offset %" PRId64 ": %s\n", offset, strerror(errno));
+ ALOGE("error seeking to offset %" PRId64 ": %s", offset, strerror(errno));
return -1;
}
if (!android::base::WriteFully(wfd, buffer, size)) {
- ALOGE("error writing offset %" PRId64 ": %s\n", offset, strerror(errno));
+ ALOGE("error writing offset %" PRId64 ": %s", offset, strerror(errno));
return -1;
}
return 0;
@@ -107,13 +110,13 @@ static struct fstab* read_fstab() {
// The fstab path is always "/fstab.${ro.hardware}".
char fstab_path[PATH_MAX+1] = "/fstab.";
if (!property_get("ro.hardware", fstab_path+strlen(fstab_path), "")) {
- ALOGE("failed to get ro.hardware\n");
+ ALOGE("failed to get ro.hardware");
return NULL;
}
fstab = fs_mgr_read_fstab(fstab_path);
if (!fstab) {
- ALOGE("failed to read %s\n", fstab_path);
+ ALOGE("failed to read %s", fstab_path);
return NULL;
}
@@ -150,16 +153,16 @@ static const char* find_block_device(const char* path, bool* encryptable, bool*
}
// Parse uncrypt_file to find the update package name.
-static bool find_uncrypt_package(std::string& package_name)
-{
- if (!android::base::ReadFileToString(uncrypt_file, &package_name)) {
- ALOGE("failed to open \"%s\": %s\n", uncrypt_file.c_str(), strerror(errno));
+static bool find_uncrypt_package(const std::string& uncrypt_path_file, std::string* package_name) {
+ CHECK(package_name != nullptr);
+ std::string uncrypt_path;
+ if (!android::base::ReadFileToString(uncrypt_path_file, &uncrypt_path)) {
+ ALOGE("failed to open \"%s\": %s", uncrypt_path_file.c_str(), strerror(errno));
return false;
}
// Remove the trailing '\n' if present.
- package_name = android::base::Trim(package_name);
-
+ *package_name = android::base::Trim(uncrypt_path);
return true;
}
@@ -167,7 +170,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
bool encrypted, int status_fd) {
std::string err;
if (!android::base::RemoveFileIfExists(map_file, &err)) {
- ALOGE("failed to remove the existing map file %s: %s\n", map_file, err.c_str());
+ ALOGE("failed to remove the existing map file %s: %s", map_file, err.c_str());
return -1;
}
std::string tmp_map_file = std::string(map_file) + ".tmp";
@@ -179,27 +182,27 @@ static int produce_block_map(const char* path, const char* map_file, const char*
// Make sure we can write to the status_file.
if (!android::base::WriteStringToFd("0\n", status_fd)) {
- ALOGE("failed to update \"%s\"\n", status_file.c_str());
+ ALOGE("failed to update \"%s\"\n", STATUS_FILE.c_str());
return -1;
}
struct stat sb;
if (stat(path, &sb) != 0) {
- ALOGE("failed to stat %s\n", path);
+ ALOGE("failed to stat %s", path);
return -1;
}
- ALOGI(" block size: %ld bytes\n", static_cast<long>(sb.st_blksize));
+ ALOGI(" block size: %ld bytes", static_cast<long>(sb.st_blksize));
int blocks = ((sb.st_size-1) / sb.st_blksize) + 1;
- ALOGI(" file size: %" PRId64 " bytes, %d blocks\n", sb.st_size, blocks);
+ ALOGI(" file size: %" PRId64 " bytes, %d blocks", sb.st_size, blocks);
std::vector<int> ranges;
std::string s = android::base::StringPrintf("%s\n%" PRId64 " %ld\n",
blk_dev, sb.st_size, static_cast<long>(sb.st_blksize));
if (!android::base::WriteStringToFd(s, mapfd.get())) {
- ALOGE("failed to write %s: %s\n", tmp_map_file.c_str(), strerror(errno));
+ ALOGE("failed to write %s: %s", tmp_map_file.c_str(), strerror(errno));
return -1;
}
@@ -212,7 +215,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
unique_fd fd(open(path, O_RDONLY));
if (!fd) {
- ALOGE("failed to open %s for reading: %s\n", path, strerror(errno));
+ ALOGE("failed to open %s for reading: %s", path, strerror(errno));
return -1;
}
@@ -220,7 +223,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
if (encrypted) {
wfd = open(blk_dev, O_WRONLY);
if (!wfd) {
- ALOGE("failed to open fd for writing: %s\n", strerror(errno));
+ ALOGE("failed to open fd for writing: %s", strerror(errno));
return -1;
}
}
@@ -239,7 +242,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
// write out head buffer
int block = head_block;
if (ioctl(fd.get(), FIBMAP, &block) != 0) {
- ALOGE("failed to find block %d\n", head_block);
+ ALOGE("failed to find block %d", head_block);
return -1;
}
add_block_to_ranges(ranges, block);
@@ -258,7 +261,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
size_t to_read = static_cast<size_t>(
std::min(static_cast<off64_t>(sb.st_blksize), sb.st_size - pos));
if (!android::base::ReadFully(fd.get(), buffers[tail].data(), to_read)) {
- ALOGE("failed to read: %s\n", strerror(errno));
+ ALOGE("failed to read: %s", strerror(errno));
return -1;
}
pos += to_read;
@@ -275,7 +278,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
// write out head buffer
int block = head_block;
if (ioctl(fd.get(), FIBMAP, &block) != 0) {
- ALOGE("failed to find block %d\n", head_block);
+ ALOGE("failed to find block %d", head_block);
return -1;
}
add_block_to_ranges(ranges, block);
@@ -291,41 +294,41 @@ static int produce_block_map(const char* path, const char* map_file, const char*
if (!android::base::WriteStringToFd(
android::base::StringPrintf("%zu\n", ranges.size() / 2), mapfd.get())) {
- ALOGE("failed to write %s: %s\n", tmp_map_file.c_str(), strerror(errno));
+ ALOGE("failed to write %s: %s", tmp_map_file.c_str(), strerror(errno));
return -1;
}
for (size_t i = 0; i < ranges.size(); i += 2) {
if (!android::base::WriteStringToFd(
android::base::StringPrintf("%d %d\n", ranges[i], ranges[i+1]), mapfd.get())) {
- ALOGE("failed to write %s: %s\n", tmp_map_file.c_str(), strerror(errno));
+ ALOGE("failed to write %s: %s", tmp_map_file.c_str(), strerror(errno));
return -1;
}
}
if (fsync(mapfd.get()) == -1) {
- ALOGE("failed to fsync \"%s\": %s\n", tmp_map_file.c_str(), strerror(errno));
+ ALOGE("failed to fsync \"%s\": %s", tmp_map_file.c_str(), strerror(errno));
return -1;
}
if (close(mapfd.get() == -1)) {
- ALOGE("failed to close %s: %s\n", tmp_map_file.c_str(), strerror(errno));
+ ALOGE("failed to close %s: %s", tmp_map_file.c_str(), strerror(errno));
return -1;
}
mapfd = -1;
if (encrypted) {
if (fsync(wfd.get()) == -1) {
- ALOGE("failed to fsync \"%s\": %s\n", blk_dev, strerror(errno));
+ ALOGE("failed to fsync \"%s\": %s", blk_dev, strerror(errno));
return -1;
}
if (close(wfd.get()) == -1) {
- ALOGE("failed to close %s: %s\n", blk_dev, strerror(errno));
+ ALOGE("failed to close %s: %s", blk_dev, strerror(errno));
return -1;
}
wfd = -1;
}
if (rename(tmp_map_file.c_str(), map_file) == -1) {
- ALOGE("failed to rename %s to %s: %s\n", tmp_map_file.c_str(), map_file, strerror(errno));
+ ALOGE("failed to rename %s to %s: %s", tmp_map_file.c_str(), map_file, strerror(errno));
return -1;
}
// Sync dir to make rename() result written to disk.
@@ -333,50 +336,74 @@ static int produce_block_map(const char* path, const char* map_file, const char*
std::string dir_name = dirname(&file_name[0]);
unique_fd dfd(open(dir_name.c_str(), O_RDONLY | O_DIRECTORY));
if (!dfd) {
- ALOGE("failed to open dir %s: %s\n", dir_name.c_str(), strerror(errno));
+ ALOGE("failed to open dir %s: %s", dir_name.c_str(), strerror(errno));
return -1;
}
if (fsync(dfd.get()) == -1) {
- ALOGE("failed to fsync %s: %s\n", dir_name.c_str(), strerror(errno));
+ ALOGE("failed to fsync %s: %s", dir_name.c_str(), strerror(errno));
return -1;
}
if (close(dfd.get() == -1)) {
- ALOGE("failed to close %s: %s\n", dir_name.c_str(), strerror(errno));
+ ALOGE("failed to close %s: %s", dir_name.c_str(), strerror(errno));
return -1;
}
dfd = -1;
return 0;
}
-static void wipe_misc() {
- ALOGI("removing old commands from misc");
+static std::string get_misc_blk_device() {
+ struct fstab* fstab = read_fstab();
+ if (fstab == nullptr) {
+ return "";
+ }
for (int i = 0; i < fstab->num_entries; ++i) {
- struct fstab_rec* v = &fstab->recs[i];
- if (!v->mount_point) continue;
- if (strcmp(v->mount_point, "/misc") == 0) {
- int fd = open(v->blk_device, O_WRONLY | O_SYNC);
- unique_fd fd_holder(fd);
-
- uint8_t zeroes[1088]; // sizeof(bootloader_message) from recovery
- memset(zeroes, 0, sizeof(zeroes));
-
- size_t written = 0;
- size_t size = sizeof(zeroes);
- while (written < size) {
- ssize_t w = TEMP_FAILURE_RETRY(write(fd, zeroes, size-written));
- if (w == -1) {
- ALOGE("zero write failed: %s\n", strerror(errno));
- return;
- } else {
- written += w;
- }
- }
- if (fsync(fd) == -1) {
- ALOGE("failed to fsync \"%s\": %s\n", v->blk_device, strerror(errno));
- return;
- }
+ fstab_rec* v = &fstab->recs[i];
+ if (v->mount_point != nullptr && strcmp(v->mount_point, "/misc") == 0) {
+ return v->blk_device;
}
}
+ return "";
+}
+
+static int read_bootloader_message(bootloader_message* out) {
+ std::string misc_blk_device = get_misc_blk_device();
+ if (misc_blk_device.empty()) {
+ ALOGE("failed to find /misc partition.");
+ return -1;
+ }
+ unique_fd fd(open(misc_blk_device.c_str(), O_RDONLY));
+ if (!fd) {
+ ALOGE("failed to open %s: %s", misc_blk_device.c_str(), strerror(errno));
+ return -1;
+ }
+ if (!android::base::ReadFully(fd.get(), out, sizeof(*out))) {
+ ALOGE("failed to read %s: %s", misc_blk_device.c_str(), strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+static int write_bootloader_message(const bootloader_message* in) {
+ std::string misc_blk_device = get_misc_blk_device();
+ if (misc_blk_device.empty()) {
+ ALOGE("failed to find /misc partition.");
+ return -1;
+ }
+ unique_fd fd(open(misc_blk_device.c_str(), O_WRONLY | O_SYNC));
+ if (!fd) {
+ ALOGE("failed to open %s: %s", misc_blk_device.c_str(), strerror(errno));
+ return -1;
+ }
+ if (!android::base::WriteFully(fd.get(), in, sizeof(*in))) {
+ ALOGE("failed to write %s: %s", misc_blk_device.c_str(), strerror(errno));
+ return -1;
+ }
+ // TODO: O_SYNC and fsync() duplicates each other?
+ if (fsync(fd.get()) == -1) {
+ ALOGE("failed to fsync %s: %s", misc_blk_device.c_str(), strerror(errno));
+ return -1;
+ }
+ return 0;
}
static void reboot_to_recovery() {
@@ -388,7 +415,7 @@ static void reboot_to_recovery() {
ALOGE("reboot didn't succeed?");
}
-int uncrypt(const char* input_path, const char* map_file, int status_fd) {
+static int uncrypt(const char* input_path, const char* map_file, int status_fd) {
ALOGI("update package is \"%s\"", input_path);
@@ -415,8 +442,8 @@ int uncrypt(const char* input_path, const char* map_file, int status_fd) {
// If the filesystem it's on isn't encrypted, we only produce the
// block map, we don't rewrite the file contents (it would be
// pointless to do so).
- ALOGI("encryptable: %s\n", encryptable ? "yes" : "no");
- ALOGI(" encrypted: %s\n", encrypted ? "yes" : "no");
+ ALOGI("encryptable: %s", encryptable ? "yes" : "no");
+ ALOGI(" encrypted: %s", encrypted ? "yes" : "no");
// Recovery supports installing packages from 3 paths: /cache,
// /data, and /sdcard. (On a particular device, other locations
@@ -435,56 +462,113 @@ int uncrypt(const char* input_path, const char* map_file, int status_fd) {
return 0;
}
-int main(int argc, char** argv) {
-
- if (argc != 3 && argc != 1 && (argc == 2 && strcmp(argv[1], "--reboot") != 0)) {
- fprintf(stderr, "usage: %s [--reboot] [<transform_path> <map_file>]\n", argv[0]);
- return 2;
+static int uncrypt_wrapper(const char* input_path, const char* map_file,
+ const std::string& status_file) {
+ // The pipe has been created by the system server.
+ unique_fd status_fd(open(status_file.c_str(), O_WRONLY | O_CREAT | O_SYNC, S_IRUSR | S_IWUSR));
+ if (!status_fd) {
+ ALOGE("failed to open pipe \"%s\": %s", status_file.c_str(), strerror(errno));
+ return 1;
}
- // When uncrypt is started with "--reboot", it wipes misc and reboots.
- // Otherwise it uncrypts the package and writes the block map.
- if (argc == 2) {
- if (read_fstab() == NULL) {
+ std::string package;
+ if (input_path == nullptr) {
+ if (!find_uncrypt_package(UNCRYPT_PATH_FILE, &package)) {
+ android::base::WriteStringToFd("-1\n", status_fd.get());
return 1;
}
- wipe_misc();
- reboot_to_recovery();
- } else {
- // The pipe has been created by the system server.
- int status_fd = open(status_file.c_str(), O_WRONLY | O_CREAT | O_SYNC, S_IRUSR | S_IWUSR);
- if (status_fd == -1) {
- ALOGE("failed to open pipe \"%s\": %s\n", status_file.c_str(), strerror(errno));
- return 1;
- }
- unique_fd status_fd_holder(status_fd);
+ input_path = package.c_str();
+ }
+ CHECK(map_file != nullptr);
+ int status = uncrypt(input_path, map_file, status_fd.get());
+ if (status != 0) {
+ android::base::WriteStringToFd("-1\n", status_fd.get());
+ return 1;
+ }
+ android::base::WriteStringToFd("100\n", status_fd.get());
+ return 0;
+}
- std::string package;
- const char* input_path;
- const char* map_file;
+static int clear_bcb(const std::string& status_file) {
+ unique_fd status_fd(open(status_file.c_str(), O_WRONLY | O_CREAT | O_SYNC, S_IRUSR | S_IWUSR));
+ if (!status_fd) {
+ ALOGE("failed to open pipe \"%s\": %s", status_file.c_str(), strerror(errno));
+ return 1;
+ }
+ bootloader_message boot = {};
+ if (write_bootloader_message(&boot) != 0) {
+ android::base::WriteStringToFd("-1\n", status_fd.get());
+ return 1;
+ }
+ android::base::WriteStringToFd("100\n", status_fd.get());
+ return 0;
+}
+
+static int setup_bcb(const std::string& command_file, const std::string& status_file) {
+ unique_fd status_fd(open(status_file.c_str(), O_WRONLY | O_CREAT | O_SYNC, S_IRUSR | S_IWUSR));
+ if (!status_fd) {
+ ALOGE("failed to open pipe \"%s\": %s", status_file.c_str(), strerror(errno));
+ return 1;
+ }
+ std::string content;
+ if (!android::base::ReadFileToString(command_file, &content)) {
+ ALOGE("failed to read \"%s\": %s", command_file.c_str(), strerror(errno));
+ android::base::WriteStringToFd("-1\n", status_fd.get());
+ return 1;
+ }
+ bootloader_message boot = {};
+ strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
+ strlcpy(boot.recovery, "recovery\n", sizeof(boot.recovery));
+ strlcat(boot.recovery, content.c_str(), sizeof(boot.recovery));
+ if (write_bootloader_message(&boot) != 0) {
+ ALOGE("failed to set bootloader message");
+ android::base::WriteStringToFd("-1\n", status_fd.get());
+ return 1;
+ }
+ android::base::WriteStringToFd("100\n", status_fd.get());
+ return 0;
+}
+static int read_bcb() {
+ bootloader_message boot;
+ if (read_bootloader_message(&boot) != 0) {
+ ALOGE("failed to get bootloader message");
+ return 1;
+ }
+ printf("bcb command: %s\n", boot.command);
+ printf("bcb recovery:\n%s\n", boot.recovery);
+ return 0;
+}
+
+static void usage(const char* exename) {
+ fprintf(stderr, "Usage of %s:\n", exename);
+ fprintf(stderr, "%s [<package_path> <map_file>] Uncrypt ota package.\n", exename);
+ fprintf(stderr, "%s --reboot Clear BCB data and reboot to recovery.\n", exename);
+ fprintf(stderr, "%s --clear-bcb Clear BCB data in misc partition.\n", exename);
+ fprintf(stderr, "%s --setup-bcb Setup BCB data by command file.\n", exename);
+ fprintf(stderr, "%s --read-bcb Read BCB data from misc partition.\n", exename);
+}
+
+int main(int argc, char** argv) {
+ if (argc == 2) {
+ if (strcmp(argv[1], "--reboot") == 0) {
+ reboot_to_recovery();
+ } else if (strcmp(argv[1], "--clear-bcb") == 0) {
+ return clear_bcb(STATUS_FILE);
+ } else if (strcmp(argv[1], "--setup-bcb") == 0) {
+ return setup_bcb(COMMAND_FILE, STATUS_FILE);
+ } else if (strcmp(argv[1], "--read-bcb") == 0) {
+ return read_bcb();
+ }
+ } else if (argc == 1 || argc == 3) {
+ const char* input_path = nullptr;
+ const char* map_file = CACHE_BLOCK_MAP.c_str();
if (argc == 3) {
- // when command-line args are given this binary is being used
- // for debugging.
input_path = argv[1];
map_file = argv[2];
- } else {
- if (!find_uncrypt_package(package)) {
- android::base::WriteStringToFd("-1\n", status_fd);
- return 1;
- }
- input_path = package.c_str();
- map_file = cache_block_map.c_str();
}
-
- int status = uncrypt(input_path, map_file, status_fd);
- if (status != 0) {
- android::base::WriteStringToFd("-1\n", status_fd);
- return 1;
- }
-
- android::base::WriteStringToFd("100\n", status_fd);
+ return uncrypt_wrapper(input_path, map_file, STATUS_FILE);
}
-
- return 0;
+ usage(argv[0]);
+ return 2;
}
diff --git a/uncrypt/uncrypt.rc b/uncrypt/uncrypt.rc
index 5f4c47936..b07c1dada 100644
--- a/uncrypt/uncrypt.rc
+++ b/uncrypt/uncrypt.rc
@@ -7,3 +7,13 @@ service pre-recovery /system/bin/uncrypt --reboot
class main
disabled
oneshot
+
+service setup-bcb /system/bin/uncrypt --setup-bcb
+ class main
+ disabled
+ oneshot
+
+service clear-bcb /system/bin/uncrypt --clear-bcb
+ class main
+ disabled
+ oneshot \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 12:14:45 +0100