From fd99a318fe630b49ba35f9a19a1866e8b1a42b7e Mon Sep 17 00:00:00 2001
From: Yabin Cui <yabinc@google.com>
Date: Thu, 9 Jun 2016 14:09:39 -0700
Subject: Verify wipe package when wiping A/B device in recovery.

To increase the security of wiping A/B devices, let uncrypt write
wipe package in misc partition. Then recovery verifies the wipe
package before wiping the device.

Based on the original cherrypick, this CL also has additional changes to
address the LOG statements and libziparchive changes.

Bug: 29159185
Test: Build and boot into recovery.

Change-Id: I186691bab1928d3dc036bc5542abd64a81bc2168
(cherry picked from commit 6faf0265c9b58db2c15b53f6d29025629d52f882)
---
 bootloader.cpp | 134 ---------------------------------------------------------
 1 file changed, 134 deletions(-)
 delete mode 100644 bootloader.cpp

(limited to 'bootloader.cpp')

diff --git a/bootloader.cpp b/bootloader.cpp
deleted file mode 100644
index dad0bab30..000000000
--- 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;
-}
-- 
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