6 files changed, 140 insertions, 204 deletions

diff --git a/bootloader.cpp b/bootloader.cpp
deleted file mode 100644
index dad0bab3..00000000
--- a/bootloader.cpp
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <fs_mgr.h>
-
-#include <android-base/logging.h>
-#include <android-base/unique_fd.h>
-
-#include "bootloader.h"
-#include "roots.h"
-
-static int get_bootloader_message_block(bootloader_message* out, const Volume* v);
-static int set_bootloader_message_block(const bootloader_message* in, const Volume* v);
-
-int get_bootloader_message(bootloader_message* out) {
-    Volume* v = volume_for_path("/misc");
-    if (v == nullptr) {
-        LOG(ERROR) << "Cannot load volume /misc!";
-        return -1;
-    }
-    if (strcmp(v->fs_type, "emmc") == 0) {
-        return get_bootloader_message_block(out, v);
-    }
-    LOG(ERROR) << "unknown misc partition fs_type \"" << v->fs_type << "\"";
-    return -1;
-}
-
-int set_bootloader_message(const bootloader_message* in) {
-    Volume* v = volume_for_path("/misc");
-    if (v == nullptr) {
-        LOG(ERROR) << "Cannot load volume /misc!";
-        return -1;
-    }
-    if (strcmp(v->fs_type, "emmc") == 0) {
-        return set_bootloader_message_block(in, v);
-    }
-    LOG(ERROR) << "unknown misc partition fs_type \"" << v->fs_type << "\"";
-    return -1;
-}
-
-// ------------------------------------
-// for misc partitions on block devices
-// ------------------------------------
-
-static void wait_for_device(const char* fn) {
-    int tries = 0;
-    int ret;
-    do {
-        ++tries;
-        struct stat buf;
-        ret = stat(fn, &buf);
-        if (ret == -1) {
-            printf("failed to stat \"%s\" try %d: %s\n", fn, tries, strerror(errno));
-            sleep(1);
-        }
-    } while (ret && tries < 10);
-
-    if (ret) {
-        printf("failed to stat \"%s\"\n", fn);
-    }
-}
-
-static int get_bootloader_message_block(bootloader_message* out,
-                                        const Volume* v) {
-    wait_for_device(v->blk_device);
-    FILE* f = fopen(v->blk_device, "rb");
-    if (f == nullptr) {
-        PLOG(ERROR) << "failed to open \"" << v->blk_device << "\"";
-        return -1;
-    }
-    bootloader_message temp;
-    int count = fread(&temp, sizeof(temp), 1, f);
-    if (count != 1) {
-        PLOG(ERROR) << "failed to read \"" << v->blk_device << "\"";
-        return -1;
-    }
-    if (fclose(f) != 0) {
-        PLOG(ERROR) << "failed to close \"" << v->blk_device << "\"";
-        return -1;
-    }
-    memcpy(out, &temp, sizeof(temp));
-    return 0;
-}
-
-static int set_bootloader_message_block(const bootloader_message* in,
-                                        const Volume* v) {
-    wait_for_device(v->blk_device);
-    android::base::unique_fd fd(open(v->blk_device, O_WRONLY | O_SYNC));
-    if (fd == -1) {
-        PLOG(ERROR) << "failed to open \"" << v->blk_device << "\"";
-        return -1;
-    }
-
-    size_t written = 0;
-    const uint8_t* start = reinterpret_cast<const uint8_t*>(in);
-    size_t total = sizeof(*in);
-    while (written < total) {
-        ssize_t wrote = TEMP_FAILURE_RETRY(write(fd, start + written, total - written));
-        if (wrote == -1) {
-            PLOG(ERROR) << "failed to write " << total << " bytes, " << written
-                        << " bytes written";
-            return -1;
-        }
-        written += wrote;
-    }
-
-    if (fsync(fd) == -1) {
-        PLOG(ERROR) << "failed to fsync \"" << v->blk_device << "\"";
-        return -1;
-    }
-    return 0;
-}
diff --git a/install.cpp b/install.cpp
index c9871523..0f9088a7 100644
--- a/install.cpp
+++ b/install.cpp
@@ -71,22 +71,33 @@ static int parse_build_number(const std::string& str) {
     return -1;
 }
 
-// Read the build.version.incremental of src/tgt from the metadata and log it to last_install.
-static void read_source_target_build(ZipArchiveHandle zip, std::vector<std::string>& log_buffer) {
+bool read_metadata_from_package(ZipArchiveHandle zip, std::string* meta_data) {
     ZipString metadata_path(METADATA_PATH);
     ZipEntry meta_entry;
+    if (meta_data == nullptr) {
+        LOG(ERROR) << "string* meta_data can't be nullptr";
+        return false;
+    }
     if (FindEntry(zip, metadata_path, &meta_entry) != 0) {
         LOG(ERROR) << "Failed to find " << METADATA_PATH << " in update package";
-        return;
+        return false;
     }
 
-    std::string meta_data(meta_entry.uncompressed_length, '\0');
-    if (ExtractToMemory(zip, &meta_entry, reinterpret_cast<uint8_t*>(&meta_data[0]),
+    meta_data->resize(meta_entry.uncompressed_length, '\0');
+    if (ExtractToMemory(zip, &meta_entry, reinterpret_cast<uint8_t*>(&(*meta_data)[0]),
                         meta_entry.uncompressed_length) != 0) {
         LOG(ERROR) << "Failed to read metadata in update package";
-        return;
+        return false;
     }
+    return true;
+}
 
+// Read the build.version.incremental of src/tgt from the metadata and log it to last_install.
+static void read_source_target_build(ZipArchiveHandle zip, std::vector<std::string>& log_buffer) {
+    std::string meta_data;
+    if (!read_metadata_from_package(zip, &meta_data)) {
+        return;
+    }
     // Examples of the pre-build and post-build strings in metadata:
     // pre-build-incremental=2943039
     // post-build-incremental=2951741
@@ -301,33 +312,16 @@ really_install_package(const char *path, bool* wipe_cache, bool needs_mount,
         return INSTALL_CORRUPT;
     }
 
-    // Load keys.
-    std::vector<Certificate> loadedKeys;
-    if (!load_keys(PUBLIC_KEYS_FILE, loadedKeys)) {
-        LOG(ERROR) << "Failed to load keys";
-        sysReleaseMap(&map);
-        return INSTALL_CORRUPT;
-    }
-    LOG(INFO) << loadedKeys.size() << " key(s) loaded from " << PUBLIC_KEYS_FILE;
-
     // Verify package.
-    ui->Print("Verifying update package...\n");
-
-    auto t0 = std::chrono::system_clock::now();
-    int err = verify_file(map.addr, map.length, loadedKeys);
-    std::chrono::duration<double> duration = std::chrono::system_clock::now() - t0;
-    ui->Print("Update package verification took %.1f s (result %d).\n", duration.count(), err);
-    if (err != VERIFY_SUCCESS) {
-        LOG(ERROR) << "signature verification failed";
+    if (!verify_package(map.addr, map.length)) {
         log_buffer.push_back(android::base::StringPrintf("error: %d", kZipVerificationFailure));
-
         sysReleaseMap(&map);
         return INSTALL_CORRUPT;
     }
 
     // Try to open the package.
     ZipArchiveHandle zip;
-    err = OpenArchiveFromMemory(map.addr, map.length, path, &zip);
+    int err = OpenArchiveFromMemory(map.addr, map.length, path, &zip);
     if (err != 0) {
         LOG(ERROR) << "Can't open " << path << " : " << ErrorCodeString(err);
         log_buffer.push_back(android::base::StringPrintf("error: %d", kZipOpenFailure));
@@ -403,3 +397,25 @@ install_package(const char* path, bool* wipe_cache, const char* install_file,
 
     return result;
 }
+
+bool verify_package(const unsigned char* package_data, size_t package_size) {
+    std::vector<Certificate> loadedKeys;
+    if (!load_keys(PUBLIC_KEYS_FILE, loadedKeys)) {
+        LOG(ERROR) << "Failed to load keys";
+        return false;
+    }
+    LOG(INFO) << loadedKeys.size() << " key(s) loaded from " << PUBLIC_KEYS_FILE;
+
+    // Verify package.
+    ui->Print("Verifying update package...\n");
+    auto t0 = std::chrono::system_clock::now();
+    int err = verify_file(const_cast<unsigned char*>(package_data), package_size, loadedKeys);
+    std::chrono::duration<double> duration = std::chrono::system_clock::now() - t0;
+    ui->Print("Update package verification took %.1f s (result %d).\n", duration.count(), err);
+    if (err != VERIFY_SUCCESS) {
+        LOG(ERROR) << "Signature verification failed";
+        LOG(ERROR) << "error: " << kZipVerificationFailure;
+        return false;
+    }
+    return true;
+}
diff --git a/install.h b/install.h
index 66764f54..7f66a51c 100644
--- a/install.h
+++ b/install.h
@@ -17,11 +17,10 @@
 #ifndef RECOVERY_INSTALL_H_
 #define RECOVERY_INSTALL_H_
 
-#include "common.h"
+#include <string>
+#include <ziparchive/zip_archive.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "common.h"
 
 enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT, INSTALL_NONE, INSTALL_SKIPPED,
         INSTALL_RETRY };
@@ -31,8 +30,12 @@ enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT, INSTALL_NONE, INSTALL_SK
 int install_package(const char* root_path, bool* wipe_cache, const char* install_file,
                     bool needs_mount, int retry_count);
 
-#ifdef __cplusplus
-}
-#endif
+// Verify the package by ota keys. Return true if the package is verified successfully,
+// otherwise return false.
+bool verify_package(const unsigned char* package_data, size_t package_size);
+
+// Read meta data file of the package, write its content in the string pointed by meta_data.
+// Return true if succeed, otherwise return false.
+bool read_metadata_from_package(ZipArchiveHandle zip, std::string* meta_data);
 
 #endif  // RECOVERY_INSTALL_H_
diff --git a/recovery.cpp b/recovery.cpp
index dc17c952..683d101f 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -86,6 +86,7 @@ static const struct option OPTIONS[] = {
   { "reason", required_argument, NULL, 'r' },
   { "security", no_argument, NULL, 'e'},
   { "wipe_ab", no_argument, NULL, 0 },
+  { "wipe_package_size", required_argument, NULL, 0 },
   { NULL, 0, NULL, 0 },
 };
 
@@ -902,12 +903,76 @@ static bool secure_wipe_partition(const std::string& partition) {
     return true;
 }
 
+// Check if the wipe package matches expectation:
+// 1. verify the package.
+// 2. check metadata (ota-type, pre-device and serial number if having one).
+static bool check_wipe_package(size_t wipe_package_size) {
+    if (wipe_package_size == 0) {
+        LOG(ERROR) << "wipe_package_size is zero";
+        return false;
+    }
+    std::string wipe_package;
+    std::string err_str;
+    if (!read_wipe_package(&wipe_package, wipe_package_size, &err_str)) {
+        PLOG(ERROR) << "Failed to read wipe package";
+        return false;
+    }
+    if (!verify_package(reinterpret_cast<const unsigned char*>(wipe_package.data()),
+                        wipe_package.size())) {
+        LOG(ERROR) << "Failed to verify package";
+        return false;
+    }
+
+    // Extract metadata
+    ZipArchiveHandle zip;
+    int err = OpenArchiveFromMemory(reinterpret_cast<void*>(&wipe_package[0]),
+                                    wipe_package.size(), "wipe_package", &zip);
+    if (err != 0) {
+        LOG(ERROR) << "Can't open wipe package : " << ErrorCodeString(err);
+        return false;
+    }
+    std::string metadata;
+    if (!read_metadata_from_package(&zip, &metadata)) {
+        CloseArchive(zip);
+        return false;
+    }
+    CloseArchive(zip);
+
+    // Check metadata
+    std::vector<std::string> lines = android::base::Split(metadata, "\n");
+    bool ota_type_matched = false;
+    bool device_type_matched = false;
+    bool has_serial_number = false;
+    bool serial_number_matched = false;
+    for (const auto& line : lines) {
+        if (line == "ota-type=BRICK") {
+            ota_type_matched = true;
+        } else if (android::base::StartsWith(line, "pre-device=")) {
+            std::string device_type = line.substr(strlen("pre-device="));
+            char real_device_type[PROPERTY_VALUE_MAX];
+            property_get("ro.build.product", real_device_type, "");
+            device_type_matched = (device_type == real_device_type);
+        } else if (android::base::StartsWith(line, "serialno=")) {
+            std::string serial_no = line.substr(strlen("serialno="));
+            char real_serial_no[PROPERTY_VALUE_MAX];
+            property_get("ro.serialno", real_serial_no, "");
+            has_serial_number = true;
+            serial_number_matched = (serial_no == real_serial_no);
+        }
+    }
+    return ota_type_matched && device_type_matched && (!has_serial_number || serial_number_matched);
+}
+
 // Wipe the current A/B device, with a secure wipe of all the partitions in
 // RECOVERY_WIPE.
-static bool wipe_ab_device() {
+static bool wipe_ab_device(size_t wipe_package_size) {
     ui->SetBackground(RecoveryUI::ERASING);
     ui->SetProgressType(RecoveryUI::INDETERMINATE);
 
+    if (!check_wipe_package(wipe_package_size)) {
+        LOG(ERROR) << "Failed to verify wipe package";
+        return false;
+    }
     std::string partition_list;
     if (!android::base::ReadFileToString(RECOVERY_WIPE, &partition_list)) {
         LOG(ERROR) << "failed to read \"" << RECOVERY_WIPE << "\"";
@@ -1426,6 +1491,7 @@ int main(int argc, char **argv) {
     bool should_wipe_data = false;
     bool should_wipe_cache = false;
     bool should_wipe_ab = false;
+    size_t wipe_package_size = 0;
     bool show_text = false;
     bool sideload = false;
     bool sideload_auto_reboot = false;
@@ -1462,6 +1528,9 @@ int main(int argc, char **argv) {
             if (strcmp(OPTIONS[option_index].name, "wipe_ab") == 0) {
                 should_wipe_ab = true;
                 break;
+            } else if (strcmp(OPTIONS[option_index].name, "wipe_package_size") == 0) {
+                android::base::ParseUint(optarg, &wipe_package_size);
+                break;
             }
             break;
         }
@@ -1607,7 +1676,7 @@ int main(int argc, char **argv) {
             status = INSTALL_ERROR;
         }
     } else if (should_wipe_ab) {
-        if (!wipe_ab_device()) {
+        if (!wipe_ab_device(wipe_package_size)) {
             status = INSTALL_ERROR;
         }
     } else if (sideload) {
diff --git a/uncrypt/include/bootloader_message_writer.h b/uncrypt/include/bootloader_message_writer.h
deleted file mode 100644
index e0ca3f44..00000000
--- a/uncrypt/include/bootloader_message_writer.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef BOOTLOADER_MESSAGE_WRITER_H
-#define BOOTLOADER_MESSAGE_WRITER_H
-
-#ifdef __cplusplus
-#include <string>
-#include <vector>
-
-bool clear_bootloader_message(std::string* err);
-
-bool write_bootloader_message(const std::vector<std::string>& options, std::string* err);
-
-#else
-#include <stdbool.h>
-
-// C Interface.
-bool write_bootloader_message(const char* options);
-#endif
-
-#endif  // BOOTLOADER_MESSAGE_WRITER_H
diff --git a/uncrypt/uncrypt.cpp b/uncrypt/uncrypt.cpp
index 8b4d8ef8..a5d692bb 100644
--- a/uncrypt/uncrypt.cpp
+++ b/uncrypt/uncrypt.cpp
@@ -528,14 +528,31 @@ static bool setup_bcb(const int socket) {
         return false;
     }
     LOG(INFO) << "  received command: [" << content << "] (" << content.size() << ")";
+    std::vector<std::string> options = android::base::Split(content, "\n");
+    std::string wipe_package;
+    for (auto& option : options) {
+        if (android::base::StartsWith(option, "--wipe_package=")) {
+            std::string path = option.substr(strlen("--wipe_package="));
+            if (!android::base::ReadFileToString(path, &wipe_package)) {
+                PLOG(ERROR) << "failed to read " << path;
+                return false;
+            }
+            option = android::base::StringPrintf("--wipe_package_size=%zu", wipe_package.size());
+        }
+    }
 
     // c8. setup the bcb command
     std::string err;
-    if (!write_bootloader_message({content}, &err)) {
+    if (!write_bootloader_message(options, &err)) {
         LOG(ERROR) << "failed to set bootloader message: " << err;
         write_status_to_socket(-1, socket);
         return false;
     }
+    if (!wipe_package.empty() && !write_wipe_package(wipe_package, &err)) {
+        PLOG(ERROR) << "failed to set wipe package: " << err;
+        write_status_to_socket(-1, socket);
+        return false;
+    }
     // c10. send "100" status
     write_status_to_socket(100, socket);
     return true;