Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <errno.h> |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 18 | #include <fcntl.h> |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 19 | #include <libgen.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/statfs.h> |
| 25 | #include <sys/types.h> |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 26 | #include <unistd.h> |
| 27 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 28 | #include <memory> |
| 29 | #include <string> |
| 30 | |
Elliott Hughes | 4b166f0 | 2015-12-04 15:30:20 -0800 | [diff] [blame] | 31 | #include <android-base/strings.h> |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 32 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 33 | #include "openssl/sha.h" |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 34 | #include "applypatch.h" |
| 35 | #include "mtdutils/mtdutils.h" |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 36 | #include "edify/expr.h" |
Jed Estep | d940887 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 37 | #include "ota_io.h" |
Tao Bao | e6aa332 | 2015-08-05 15:20:27 -0700 | [diff] [blame] | 38 | #include "print_sha1.h" |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 39 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 40 | static int LoadPartitionContents(const char* filename, FileContents* file); |
Doug Zongker | bc7ffed | 2014-08-15 14:31:52 -0700 | [diff] [blame] | 41 | static ssize_t FileSink(const unsigned char* data, ssize_t len, void* token); |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 42 | static int GenerateTarget(FileContents* source_file, |
| 43 | const Value* source_patch_value, |
| 44 | FileContents* copy_file, |
| 45 | const Value* copy_patch_value, |
| 46 | const char* source_filename, |
| 47 | const char* target_filename, |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 48 | const uint8_t target_sha1[SHA_DIGEST_LENGTH], |
Doug Zongker | a3ccba6 | 2012-08-20 15:28:02 -0700 | [diff] [blame] | 49 | size_t target_size, |
| 50 | const Value* bonus_data); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 51 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 52 | static bool mtd_partitions_scanned = false; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 53 | |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 54 | // Read a file into memory; store the file contents and associated |
Hristo Bojinov | db314d6 | 2010-08-02 10:29:49 -0700 | [diff] [blame] | 55 | // metadata in *file. |
| 56 | // |
| 57 | // Return 0 on success. |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 58 | int LoadFileContents(const char* filename, FileContents* file) { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 59 | // A special 'filename' beginning with "MTD:" or "EMMC:" means to |
| 60 | // load the contents of a partition. |
| 61 | if (strncmp(filename, "MTD:", 4) == 0 || |
| 62 | strncmp(filename, "EMMC:", 5) == 0) { |
| 63 | return LoadPartitionContents(filename, file); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 64 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 65 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 66 | if (stat(filename, &file->st) != 0) { |
| 67 | printf("failed to stat \"%s\": %s\n", filename, strerror(errno)); |
| 68 | return -1; |
| 69 | } |
| 70 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 71 | std::vector<unsigned char> data(file->st.st_size); |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 72 | FILE* f = ota_fopen(filename, "rb"); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 73 | if (f == NULL) { |
| 74 | printf("failed to open \"%s\": %s\n", filename, strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 75 | return -1; |
| 76 | } |
| 77 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 78 | size_t bytes_read = ota_fread(data.data(), 1, data.size(), f); |
| 79 | if (bytes_read != data.size()) { |
| 80 | printf("short read of \"%s\" (%zu bytes of %zu)\n", filename, bytes_read, data.size()); |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 81 | ota_fclose(f); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 82 | return -1; |
| 83 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 84 | ota_fclose(f); |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 85 | file->data = std::move(data); |
| 86 | SHA1(file->data.data(), file->data.size(), file->sha1); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 87 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 88 | } |
| 89 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 90 | // Load the contents of an MTD or EMMC partition into the provided |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 91 | // FileContents. filename should be a string of the form |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 92 | // "MTD:<partition_name>:<size_1>:<sha1_1>:<size_2>:<sha1_2>:..." (or |
| 93 | // "EMMC:<partition_device>:..."). The smallest size_n bytes for |
| 94 | // which that prefix of the partition contents has the corresponding |
| 95 | // sha1 hash will be loaded. It is acceptable for a size value to be |
| 96 | // repeated with different sha1s. Will return 0 on success. |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 97 | // |
| 98 | // This complexity is needed because if an OTA installation is |
| 99 | // interrupted, the partition might contain either the source or the |
| 100 | // target data, which might be of different lengths. We need to know |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 101 | // the length in order to read from a partition (there is no |
| 102 | // "end-of-file" marker), so the caller must specify the possible |
| 103 | // lengths and the hash of the data, and we'll do the load expecting |
| 104 | // to find one of those hashes. |
| 105 | enum PartitionType { MTD, EMMC }; |
| 106 | |
| 107 | static int LoadPartitionContents(const char* filename, FileContents* file) { |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 108 | std::string copy(filename); |
| 109 | std::vector<std::string> pieces = android::base::Split(copy, ":"); |
| 110 | if (pieces.size() < 4 || pieces.size() % 2 != 0) { |
| 111 | printf("LoadPartitionContents called with bad filename (%s)\n", filename); |
| 112 | return -1; |
| 113 | } |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 114 | |
| 115 | enum PartitionType type; |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 116 | if (pieces[0] == "MTD") { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 117 | type = MTD; |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 118 | } else if (pieces[0] == "EMMC") { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 119 | type = EMMC; |
| 120 | } else { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 121 | printf("LoadPartitionContents called with bad filename (%s)\n", filename); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 122 | return -1; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 123 | } |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 124 | const char* partition = pieces[1].c_str(); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 125 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 126 | size_t pairs = (pieces.size() - 2) / 2; // # of (size, sha1) pairs in filename |
| 127 | std::vector<size_t> index(pairs); |
| 128 | std::vector<size_t> size(pairs); |
| 129 | std::vector<std::string> sha1sum(pairs); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 130 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 131 | for (size_t i = 0; i < pairs; ++i) { |
| 132 | size[i] = strtol(pieces[i*2+2].c_str(), NULL, 10); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 133 | if (size[i] == 0) { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 134 | printf("LoadPartitionContents called with bad size (%s)\n", filename); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 135 | return -1; |
| 136 | } |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 137 | sha1sum[i] = pieces[i*2+3].c_str(); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 138 | index[i] = i; |
| 139 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 140 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 141 | // Sort the index[] array so it indexes the pairs in order of increasing size. |
| 142 | sort(index.begin(), index.end(), |
| 143 | [&](const size_t& i, const size_t& j) { |
| 144 | return (size[i] < size[j]); |
| 145 | } |
| 146 | ); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 147 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 148 | MtdReadContext* ctx = NULL; |
| 149 | FILE* dev = NULL; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 150 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 151 | switch (type) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 152 | case MTD: { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 153 | if (!mtd_partitions_scanned) { |
| 154 | mtd_scan_partitions(); |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 155 | mtd_partitions_scanned = true; |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 156 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 157 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 158 | const MtdPartition* mtd = mtd_find_partition_by_name(partition); |
| 159 | if (mtd == NULL) { |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 160 | printf("mtd partition \"%s\" not found (loading %s)\n", partition, filename); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 161 | return -1; |
| 162 | } |
| 163 | |
| 164 | ctx = mtd_read_partition(mtd); |
| 165 | if (ctx == NULL) { |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 166 | printf("failed to initialize read of mtd partition \"%s\"\n", partition); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 167 | return -1; |
| 168 | } |
| 169 | break; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 170 | } |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 171 | |
| 172 | case EMMC: |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 173 | dev = ota_fopen(partition, "rb"); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 174 | if (dev == NULL) { |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 175 | printf("failed to open emmc partition \"%s\": %s\n", partition, strerror(errno)); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 176 | return -1; |
| 177 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 178 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 179 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 180 | SHA_CTX sha_ctx; |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 181 | SHA1_Init(&sha_ctx); |
| 182 | uint8_t parsed_sha[SHA_DIGEST_LENGTH]; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 183 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 184 | // Allocate enough memory to hold the largest size. |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 185 | std::vector<unsigned char> data(size[index[pairs-1]]); |
| 186 | char* p = reinterpret_cast<char*>(data.data()); |
| 187 | size_t data_size = 0; // # bytes read so far |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 188 | bool found = false; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 189 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 190 | for (size_t i = 0; i < pairs; ++i) { |
| 191 | // Read enough additional bytes to get us up to the next size. (Again, |
| 192 | // we're trying the possibilities in order of increasing size). |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 193 | size_t next = size[index[i]] - data_size; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 194 | if (next > 0) { |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 195 | size_t read = 0; |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 196 | switch (type) { |
| 197 | case MTD: |
| 198 | read = mtd_read_data(ctx, p, next); |
| 199 | break; |
| 200 | |
| 201 | case EMMC: |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 202 | read = ota_fread(p, 1, next, dev); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 203 | break; |
| 204 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 205 | if (next != read) { |
Mark Salyzyn | f3bb31c | 2014-03-14 09:39:48 -0700 | [diff] [blame] | 206 | printf("short read (%zu bytes of %zu) for partition \"%s\"\n", |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 207 | read, next, partition); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 208 | return -1; |
| 209 | } |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 210 | SHA1_Update(&sha_ctx, p, read); |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 211 | data_size += read; |
| 212 | p += read; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | // Duplicate the SHA context and finalize the duplicate so we can |
| 216 | // check it against this pair's expected hash. |
| 217 | SHA_CTX temp_ctx; |
| 218 | memcpy(&temp_ctx, &sha_ctx, sizeof(SHA_CTX)); |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 219 | uint8_t sha_so_far[SHA_DIGEST_LENGTH]; |
| 220 | SHA1_Final(sha_so_far, &temp_ctx); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 221 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 222 | if (ParseSha1(sha1sum[index[i]].c_str(), parsed_sha) != 0) { |
| 223 | printf("failed to parse sha1 %s in %s\n", sha1sum[index[i]].c_str(), filename); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 224 | return -1; |
| 225 | } |
| 226 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 227 | if (memcmp(sha_so_far, parsed_sha, SHA_DIGEST_LENGTH) == 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 228 | // we have a match. stop reading the partition; we'll return |
| 229 | // the data we've read so far. |
Mark Salyzyn | f3bb31c | 2014-03-14 09:39:48 -0700 | [diff] [blame] | 230 | printf("partition read matched size %zu sha %s\n", |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 231 | size[index[i]], sha1sum[index[i]].c_str()); |
| 232 | found = true; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 233 | break; |
| 234 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 235 | } |
| 236 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 237 | switch (type) { |
| 238 | case MTD: |
| 239 | mtd_read_close(ctx); |
| 240 | break; |
| 241 | |
| 242 | case EMMC: |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 243 | ota_fclose(dev); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 244 | break; |
| 245 | } |
| 246 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 247 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 248 | if (!found) { |
| 249 | // Ran off the end of the list of (size,sha1) pairs without finding a match. |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 250 | printf("contents of partition \"%s\" didn't match %s\n", partition, filename); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 251 | return -1; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 252 | } |
| 253 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 254 | SHA1_Final(file->sha1, &sha_ctx); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 255 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 256 | data.resize(data_size); |
| 257 | file->data = std::move(data); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 258 | // Fake some stat() info. |
| 259 | file->st.st_mode = 0644; |
| 260 | file->st.st_uid = 0; |
| 261 | file->st.st_gid = 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 262 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 263 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | |
| 267 | // Save the contents of the given FileContents object under the given |
| 268 | // filename. Return 0 on success. |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 269 | int SaveFileContents(const char* filename, const FileContents* file) { |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 270 | int fd = ota_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, S_IRUSR | S_IWUSR); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 271 | if (fd < 0) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 272 | printf("failed to open \"%s\" for write: %s\n", filename, strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 273 | return -1; |
| 274 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 275 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 276 | ssize_t bytes_written = FileSink(file->data.data(), file->data.size(), &fd); |
| 277 | if (bytes_written != static_cast<ssize_t>(file->data.size())) { |
| 278 | printf("short write of \"%s\" (%zd bytes of %zu) (%s)\n", |
| 279 | filename, bytes_written, file->data.size(), strerror(errno)); |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 280 | ota_close(fd); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 281 | return -1; |
| 282 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 283 | if (ota_fsync(fd) != 0) { |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 284 | printf("fsync of \"%s\" failed: %s\n", filename, strerror(errno)); |
| 285 | return -1; |
| 286 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 287 | if (ota_close(fd) != 0) { |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 288 | printf("close of \"%s\" failed: %s\n", filename, strerror(errno)); |
| 289 | return -1; |
| 290 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 291 | |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 292 | if (chmod(filename, file->st.st_mode) != 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 293 | printf("chmod of \"%s\" failed: %s\n", filename, strerror(errno)); |
| 294 | return -1; |
| 295 | } |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 296 | if (chown(filename, file->st.st_uid, file->st.st_gid) != 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 297 | printf("chown of \"%s\" failed: %s\n", filename, strerror(errno)); |
| 298 | return -1; |
| 299 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 300 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 301 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 302 | } |
| 303 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 304 | // Write a memory buffer to 'target' partition, a string of the form |
Tao Bao | 1ce7a2a | 2015-07-24 15:29:12 -0700 | [diff] [blame] | 305 | // "MTD:<partition>[:...]" or "EMMC:<partition_device>[:...]". The target name |
| 306 | // might contain multiple colons, but WriteToPartition() only uses the first |
| 307 | // two and ignores the rest. Return 0 on success. |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 308 | int WriteToPartition(const unsigned char* data, size_t len, const char* target) { |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 309 | std::string copy(target); |
| 310 | std::vector<std::string> pieces = android::base::Split(copy, ":"); |
| 311 | |
Tao Bao | 1ce7a2a | 2015-07-24 15:29:12 -0700 | [diff] [blame] | 312 | if (pieces.size() < 2) { |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 313 | printf("WriteToPartition called with bad target (%s)\n", target); |
| 314 | return -1; |
| 315 | } |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 316 | |
| 317 | enum PartitionType type; |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 318 | if (pieces[0] == "MTD") { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 319 | type = MTD; |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 320 | } else if (pieces[0] == "EMMC") { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 321 | type = EMMC; |
| 322 | } else { |
| 323 | printf("WriteToPartition called with bad target (%s)\n", target); |
| 324 | return -1; |
| 325 | } |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 326 | const char* partition = pieces[1].c_str(); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 327 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 328 | switch (type) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 329 | case MTD: { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 330 | if (!mtd_partitions_scanned) { |
| 331 | mtd_scan_partitions(); |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 332 | mtd_partitions_scanned = true; |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | const MtdPartition* mtd = mtd_find_partition_by_name(partition); |
| 336 | if (mtd == NULL) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 337 | printf("mtd partition \"%s\" not found for writing\n", partition); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 338 | return -1; |
| 339 | } |
| 340 | |
| 341 | MtdWriteContext* ctx = mtd_write_partition(mtd); |
| 342 | if (ctx == NULL) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 343 | printf("failed to init mtd partition \"%s\" for writing\n", partition); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 344 | return -1; |
| 345 | } |
| 346 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 347 | size_t written = mtd_write_data(ctx, reinterpret_cast<const char*>(data), len); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 348 | if (written != len) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 349 | printf("only wrote %zu of %zu bytes to MTD %s\n", written, len, partition); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 350 | mtd_write_close(ctx); |
| 351 | return -1; |
| 352 | } |
| 353 | |
| 354 | if (mtd_erase_blocks(ctx, -1) < 0) { |
| 355 | printf("error finishing mtd write of %s\n", partition); |
| 356 | mtd_write_close(ctx); |
| 357 | return -1; |
| 358 | } |
| 359 | |
| 360 | if (mtd_write_close(ctx)) { |
| 361 | printf("error closing mtd write of %s\n", partition); |
| 362 | return -1; |
| 363 | } |
| 364 | break; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 365 | } |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 366 | |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 367 | case EMMC: { |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 368 | size_t start = 0; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 369 | bool success = false; |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 370 | int fd = ota_open(partition, O_RDWR | O_SYNC); |
Doug Zongker | c870a99 | 2013-07-09 10:34:46 -0700 | [diff] [blame] | 371 | if (fd < 0) { |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 372 | printf("failed to open %s: %s\n", partition, strerror(errno)); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 373 | return -1; |
| 374 | } |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 375 | |
Tao Bao | aca8e89 | 2015-07-17 11:47:44 -0700 | [diff] [blame] | 376 | for (size_t attempt = 0; attempt < 2; ++attempt) { |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 377 | if (TEMP_FAILURE_RETRY(lseek(fd, start, SEEK_SET)) == -1) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 378 | printf("failed seek on %s: %s\n", partition, strerror(errno)); |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 379 | return -1; |
| 380 | } |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 381 | while (start < len) { |
| 382 | size_t to_write = len - start; |
Doug Zongker | 168724c | 2013-12-19 15:16:57 -0800 | [diff] [blame] | 383 | if (to_write > 1<<20) to_write = 1<<20; |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 384 | |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 385 | ssize_t written = TEMP_FAILURE_RETRY(ota_write(fd, data+start, to_write)); |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 386 | if (written == -1) { |
| 387 | printf("failed write writing to %s: %s\n", partition, strerror(errno)); |
| 388 | return -1; |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 389 | } |
Doug Zongker | c870a99 | 2013-07-09 10:34:46 -0700 | [diff] [blame] | 390 | start += written; |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 391 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 392 | if (ota_fsync(fd) != 0) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 393 | printf("failed to sync to %s (%s)\n", partition, strerror(errno)); |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 394 | return -1; |
| 395 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 396 | if (ota_close(fd) != 0) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 397 | printf("failed to close %s (%s)\n", partition, strerror(errno)); |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 398 | return -1; |
| 399 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 400 | fd = ota_open(partition, O_RDONLY); |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 401 | if (fd < 0) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 402 | printf("failed to reopen %s for verify (%s)\n", partition, strerror(errno)); |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 403 | return -1; |
| 404 | } |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 405 | |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 406 | // Drop caches so our subsequent verification read |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 407 | // won't just be reading the cache. |
| 408 | sync(); |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 409 | int dc = ota_open("/proc/sys/vm/drop_caches", O_WRONLY); |
| 410 | if (TEMP_FAILURE_RETRY(ota_write(dc, "3\n", 2)) == -1) { |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 411 | printf("write to /proc/sys/vm/drop_caches failed: %s\n", strerror(errno)); |
| 412 | } else { |
| 413 | printf(" caches dropped\n"); |
| 414 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 415 | ota_close(dc); |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 416 | sleep(1); |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 417 | |
| 418 | // verify |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 419 | if (TEMP_FAILURE_RETRY(lseek(fd, 0, SEEK_SET)) == -1) { |
| 420 | printf("failed to seek back to beginning of %s: %s\n", |
| 421 | partition, strerror(errno)); |
| 422 | return -1; |
| 423 | } |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 424 | unsigned char buffer[4096]; |
| 425 | start = len; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 426 | for (size_t p = 0; p < len; p += sizeof(buffer)) { |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 427 | size_t to_read = len - p; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 428 | if (to_read > sizeof(buffer)) { |
| 429 | to_read = sizeof(buffer); |
| 430 | } |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 431 | |
Doug Zongker | c870a99 | 2013-07-09 10:34:46 -0700 | [diff] [blame] | 432 | size_t so_far = 0; |
| 433 | while (so_far < to_read) { |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 434 | ssize_t read_count = |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 435 | TEMP_FAILURE_RETRY(ota_read(fd, buffer+so_far, to_read-so_far)); |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 436 | if (read_count == -1) { |
| 437 | printf("verify read error %s at %zu: %s\n", |
| 438 | partition, p, strerror(errno)); |
| 439 | return -1; |
Doug Zongker | c870a99 | 2013-07-09 10:34:46 -0700 | [diff] [blame] | 440 | } |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 441 | if (static_cast<size_t>(read_count) < to_read) { |
Mark Salyzyn | f3bb31c | 2014-03-14 09:39:48 -0700 | [diff] [blame] | 442 | printf("short verify read %s at %zu: %zd %zu %s\n", |
Doug Zongker | c870a99 | 2013-07-09 10:34:46 -0700 | [diff] [blame] | 443 | partition, p, read_count, to_read, strerror(errno)); |
| 444 | } |
| 445 | so_far += read_count; |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 446 | } |
| 447 | |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 448 | if (memcmp(buffer, data+p, to_read) != 0) { |
Mark Salyzyn | f3bb31c | 2014-03-14 09:39:48 -0700 | [diff] [blame] | 449 | printf("verification failed starting at %zu\n", p); |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 450 | start = p; |
| 451 | break; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | if (start == len) { |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 456 | printf("verification read succeeded (attempt %zu)\n", attempt+1); |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 457 | success = true; |
| 458 | break; |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | if (!success) { |
| 463 | printf("failed to verify after all attempts\n"); |
| 464 | return -1; |
| 465 | } |
| 466 | |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 467 | if (ota_close(fd) != 0) { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 468 | printf("error closing %s (%s)\n", partition, strerror(errno)); |
| 469 | return -1; |
| 470 | } |
Doug Zongker | bf4a69a | 2013-07-10 13:39:50 -0700 | [diff] [blame] | 471 | sync(); |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 472 | break; |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 473 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 474 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 475 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 476 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | |
| 480 | // Take a string 'str' of 40 hex digits and parse it into the 20 |
| 481 | // byte array 'digest'. 'str' may contain only the digest or be of |
| 482 | // the form "<digest>:<anything>". Return 0 on success, -1 on any |
| 483 | // error. |
| 484 | int ParseSha1(const char* str, uint8_t* digest) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 485 | const char* ps = str; |
| 486 | uint8_t* pd = digest; |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 487 | for (int i = 0; i < SHA_DIGEST_LENGTH * 2; ++i, ++ps) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 488 | int digit; |
| 489 | if (*ps >= '0' && *ps <= '9') { |
| 490 | digit = *ps - '0'; |
| 491 | } else if (*ps >= 'a' && *ps <= 'f') { |
| 492 | digit = *ps - 'a' + 10; |
| 493 | } else if (*ps >= 'A' && *ps <= 'F') { |
| 494 | digit = *ps - 'A' + 10; |
| 495 | } else { |
| 496 | return -1; |
| 497 | } |
| 498 | if (i % 2 == 0) { |
| 499 | *pd = digit << 4; |
| 500 | } else { |
| 501 | *pd |= digit; |
| 502 | ++pd; |
| 503 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 504 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 505 | if (*ps != '\0') return -1; |
| 506 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 507 | } |
| 508 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 509 | // Search an array of sha1 strings for one matching the given sha1. |
| 510 | // Return the index of the match on success, or -1 if no match is |
| 511 | // found. |
Doug Zongker | 044a0b4 | 2013-07-08 09:42:54 -0700 | [diff] [blame] | 512 | int FindMatchingPatch(uint8_t* sha1, char* const * const patch_sha1_str, |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 513 | int num_patches) { |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 514 | uint8_t patch_sha1[SHA_DIGEST_LENGTH]; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 515 | for (int i = 0; i < num_patches; ++i) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 516 | if (ParseSha1(patch_sha1_str[i], patch_sha1) == 0 && |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 517 | memcmp(patch_sha1, sha1, SHA_DIGEST_LENGTH) == 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 518 | return i; |
| 519 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 520 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 521 | return -1; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | // Returns 0 if the contents of the file (argv[2]) or the cached file |
| 525 | // match any of the sha1's on the command line (argv[3:]). Returns |
| 526 | // nonzero otherwise. |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 527 | int applypatch_check(const char* filename, int num_patches, |
| 528 | char** const patch_sha1_str) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 529 | FileContents file; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 530 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 531 | // It's okay to specify no sha1s; the check will pass if the |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 532 | // LoadFileContents is successful. (Useful for reading |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 533 | // partitions, where the filename encodes the sha1s; no need to |
| 534 | // check them twice.) |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 535 | if (LoadFileContents(filename, &file) != 0 || |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 536 | (num_patches > 0 && |
| 537 | FindMatchingPatch(file.sha1, patch_sha1_str, num_patches) < 0)) { |
| 538 | printf("file \"%s\" doesn't have any of expected " |
| 539 | "sha1 sums; checking cache\n", filename); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 540 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 541 | // If the source file is missing or corrupted, it might be because |
| 542 | // we were killed in the middle of patching it. A copy of it |
| 543 | // should have been made in CACHE_TEMP_SOURCE. If that file |
| 544 | // exists and matches the sha1 we're looking for, the check still |
| 545 | // passes. |
| 546 | |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 547 | if (LoadFileContents(CACHE_TEMP_SOURCE, &file) != 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 548 | printf("failed to load cache file\n"); |
| 549 | return 1; |
| 550 | } |
| 551 | |
| 552 | if (FindMatchingPatch(file.sha1, patch_sha1_str, num_patches) < 0) { |
| 553 | printf("cache bits don't match any sha1 for \"%s\"\n", filename); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 554 | return 1; |
| 555 | } |
| 556 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 557 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 558 | } |
| 559 | |
| 560 | int ShowLicenses() { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 561 | ShowBSDiffLicense(); |
| 562 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 563 | } |
| 564 | |
Doug Zongker | bc7ffed | 2014-08-15 14:31:52 -0700 | [diff] [blame] | 565 | ssize_t FileSink(const unsigned char* data, ssize_t len, void* token) { |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 566 | int fd = *static_cast<int*>(token); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 567 | ssize_t done = 0; |
| 568 | ssize_t wrote; |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 569 | while (done < len) { |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 570 | wrote = TEMP_FAILURE_RETRY(ota_write(fd, data+done, len-done)); |
Elliott Hughes | 7bad7c4 | 2015-04-28 17:24:24 -0700 | [diff] [blame] | 571 | if (wrote == -1) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 572 | printf("error writing %zd bytes: %s\n", (len-done), strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 573 | return done; |
| 574 | } |
| 575 | done += wrote; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 576 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 577 | return done; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 578 | } |
| 579 | |
Doug Zongker | bc7ffed | 2014-08-15 14:31:52 -0700 | [diff] [blame] | 580 | ssize_t MemorySink(const unsigned char* data, ssize_t len, void* token) { |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 581 | std::string* s = static_cast<std::string*>(token); |
| 582 | s->append(reinterpret_cast<const char*>(data), len); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 583 | return len; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | // Return the amount of free space (in bytes) on the filesystem |
| 587 | // containing filename. filename must exist. Return -1 on error. |
| 588 | size_t FreeSpaceForFile(const char* filename) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 589 | struct statfs sf; |
| 590 | if (statfs(filename, &sf) != 0) { |
| 591 | printf("failed to statfs %s: %s\n", filename, strerror(errno)); |
| 592 | return -1; |
| 593 | } |
caozhiyuan | 3b49776 | 2015-05-19 17:21:00 +0800 | [diff] [blame] | 594 | return sf.f_bsize * sf.f_bavail; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 595 | } |
| 596 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 597 | int CacheSizeCheck(size_t bytes) { |
| 598 | if (MakeFreeSpaceOnCache(bytes) < 0) { |
| 599 | printf("unable to make %ld bytes available on /cache\n", (long)bytes); |
| 600 | return 1; |
| 601 | } else { |
| 602 | return 0; |
| 603 | } |
| 604 | } |
| 605 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 606 | // This function applies binary patches to files in a way that is safe |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 607 | // (the original file is not touched until we have the desired |
| 608 | // replacement for it) and idempotent (it's okay to run this program |
| 609 | // multiple times). |
| 610 | // |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 611 | // - if the sha1 hash of <target_filename> is <target_sha1_string>, |
| 612 | // does nothing and exits successfully. |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 613 | // |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 614 | // - otherwise, if the sha1 hash of <source_filename> is one of the |
| 615 | // entries in <patch_sha1_str>, the corresponding patch from |
| 616 | // <patch_data> (which must be a VAL_BLOB) is applied to produce a |
| 617 | // new file (the type of patch is automatically detected from the |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 618 | // blob data). If that new file has sha1 hash <target_sha1_str>, |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 619 | // moves it to replace <target_filename>, and exits successfully. |
| 620 | // Note that if <source_filename> and <target_filename> are not the |
| 621 | // same, <source_filename> is NOT deleted on success. |
| 622 | // <target_filename> may be the string "-" to mean "the same as |
| 623 | // source_filename". |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 624 | // |
| 625 | // - otherwise, or if any error is encountered, exits with non-zero |
| 626 | // status. |
| 627 | // |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 628 | // <source_filename> may refer to a partition to read the source data. |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 629 | // See the comments for the LoadPartitionContents() function above |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 630 | // for the format of such a filename. |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 631 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 632 | int applypatch(const char* source_filename, |
| 633 | const char* target_filename, |
| 634 | const char* target_sha1_str, |
| 635 | size_t target_size, |
| 636 | int num_patches, |
| 637 | char** const patch_sha1_str, |
Doug Zongker | a3ccba6 | 2012-08-20 15:28:02 -0700 | [diff] [blame] | 638 | Value** patch_data, |
| 639 | Value* bonus_data) { |
Doug Zongker | bf80f49 | 2012-10-19 12:24:26 -0700 | [diff] [blame] | 640 | printf("patch %s: ", source_filename); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 641 | |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 642 | if (target_filename[0] == '-' && target_filename[1] == '\0') { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 643 | target_filename = source_filename; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 644 | } |
| 645 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 646 | uint8_t target_sha1[SHA_DIGEST_LENGTH]; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 647 | if (ParseSha1(target_sha1_str, target_sha1) != 0) { |
| 648 | printf("failed to parse tgt-sha1 \"%s\"\n", target_sha1_str); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 649 | return 1; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 650 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 651 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 652 | FileContents copy_file; |
| 653 | FileContents source_file; |
| 654 | const Value* source_patch_value = NULL; |
| 655 | const Value* copy_patch_value = NULL; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 656 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 657 | // We try to load the target file into the source_file object. |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 658 | if (LoadFileContents(target_filename, &source_file) == 0) { |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 659 | if (memcmp(source_file.sha1, target_sha1, SHA_DIGEST_LENGTH) == 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 660 | // The early-exit case: the patch was already applied, this file |
| 661 | // has the desired hash, nothing for us to do. |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 662 | printf("already %s\n", short_sha1(target_sha1).c_str()); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 663 | return 0; |
| 664 | } |
| 665 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 666 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 667 | if (source_file.data.empty() || |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 668 | (target_filename != source_filename && |
| 669 | strcmp(target_filename, source_filename) != 0)) { |
| 670 | // Need to load the source file: either we failed to load the |
| 671 | // target file, or we did but it's different from the source file. |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 672 | source_file.data.clear(); |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 673 | LoadFileContents(source_filename, &source_file); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 674 | } |
| 675 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 676 | if (!source_file.data.empty()) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 677 | int to_use = FindMatchingPatch(source_file.sha1, patch_sha1_str, num_patches); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 678 | if (to_use >= 0) { |
| 679 | source_patch_value = patch_data[to_use]; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | if (source_patch_value == NULL) { |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 684 | source_file.data.clear(); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 685 | printf("source file is bad; trying copy\n"); |
| 686 | |
Doug Zongker | a1bc148 | 2014-02-13 15:18:19 -0800 | [diff] [blame] | 687 | if (LoadFileContents(CACHE_TEMP_SOURCE, ©_file) < 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 688 | // fail. |
| 689 | printf("failed to read copy file\n"); |
| 690 | return 1; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 691 | } |
| 692 | |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 693 | int to_use = FindMatchingPatch(copy_file.sha1, patch_sha1_str, num_patches); |
Doug Zongker | 8cd9e4f | 2010-08-12 17:38:09 -0700 | [diff] [blame] | 694 | if (to_use >= 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 695 | copy_patch_value = patch_data[to_use]; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 696 | } |
| 697 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 698 | if (copy_patch_value == NULL) { |
| 699 | // fail. |
| 700 | printf("copy file doesn't match source SHA-1s either\n"); |
| 701 | return 1; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 702 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 703 | } |
| 704 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 705 | return GenerateTarget(&source_file, source_patch_value, |
| 706 | ©_file, copy_patch_value, |
| 707 | source_filename, target_filename, |
| 708 | target_sha1, target_size, bonus_data); |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 709 | } |
| 710 | |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 711 | /* |
| 712 | * This function flashes a given image to the target partition. It verifies |
| 713 | * the target cheksum first, and will return if target has the desired hash. |
| 714 | * It checks the checksum of the given source image before flashing, and |
| 715 | * verifies the target partition afterwards. The function is idempotent. |
| 716 | * Returns zero on success. |
| 717 | */ |
| 718 | int applypatch_flash(const char* source_filename, const char* target_filename, |
| 719 | const char* target_sha1_str, size_t target_size) { |
| 720 | printf("flash %s: ", target_filename); |
| 721 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 722 | uint8_t target_sha1[SHA_DIGEST_LENGTH]; |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 723 | if (ParseSha1(target_sha1_str, target_sha1) != 0) { |
| 724 | printf("failed to parse tgt-sha1 \"%s\"\n", target_sha1_str); |
| 725 | return 1; |
| 726 | } |
| 727 | |
| 728 | FileContents source_file; |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 729 | std::string target_str(target_filename); |
| 730 | |
| 731 | std::vector<std::string> pieces = android::base::Split(target_str, ":"); |
| 732 | if (pieces.size() != 2 || (pieces[0] != "MTD" && pieces[0] != "EMMC")) { |
| 733 | printf("invalid target name \"%s\"", target_filename); |
| 734 | return 1; |
| 735 | } |
| 736 | |
| 737 | // Load the target into the source_file object to see if already applied. |
| 738 | pieces.push_back(std::to_string(target_size)); |
| 739 | pieces.push_back(target_sha1_str); |
| 740 | std::string fullname = android::base::Join(pieces, ':'); |
| 741 | if (LoadPartitionContents(fullname.c_str(), &source_file) == 0 && |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 742 | memcmp(source_file.sha1, target_sha1, SHA_DIGEST_LENGTH) == 0) { |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 743 | // The early-exit case: the image was already applied, this partition |
| 744 | // has the desired hash, nothing for us to do. |
| 745 | printf("already %s\n", short_sha1(target_sha1).c_str()); |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | if (LoadFileContents(source_filename, &source_file) == 0) { |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 750 | if (memcmp(source_file.sha1, target_sha1, SHA_DIGEST_LENGTH) != 0) { |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 751 | // The source doesn't have desired checksum. |
| 752 | printf("source \"%s\" doesn't have expected sha1 sum\n", source_filename); |
| 753 | printf("expected: %s, found: %s\n", short_sha1(target_sha1).c_str(), |
| 754 | short_sha1(source_file.sha1).c_str()); |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 755 | return 1; |
| 756 | } |
| 757 | } |
| 758 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 759 | if (WriteToPartition(source_file.data.data(), target_size, target_filename) != 0) { |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 760 | printf("write of copied data to %s failed\n", target_filename); |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 761 | return 1; |
| 762 | } |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 763 | return 0; |
| 764 | } |
| 765 | |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 766 | static int GenerateTarget(FileContents* source_file, |
| 767 | const Value* source_patch_value, |
| 768 | FileContents* copy_file, |
| 769 | const Value* copy_patch_value, |
| 770 | const char* source_filename, |
| 771 | const char* target_filename, |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 772 | const uint8_t target_sha1[SHA_DIGEST_LENGTH], |
Doug Zongker | a3ccba6 | 2012-08-20 15:28:02 -0700 | [diff] [blame] | 773 | size_t target_size, |
| 774 | const Value* bonus_data) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 775 | int retry = 1; |
| 776 | SHA_CTX ctx; |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 777 | std::string memory_sink_str; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 778 | FileContents* source_to_use; |
Doug Zongker | 1c43c97 | 2012-02-28 11:07:09 -0800 | [diff] [blame] | 779 | int made_copy = 0; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 780 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 781 | bool target_is_partition = (strncmp(target_filename, "MTD:", 4) == 0 || |
| 782 | strncmp(target_filename, "EMMC:", 5) == 0); |
| 783 | const std::string tmp_target_filename = std::string(target_filename) + ".patch"; |
| 784 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 785 | // assume that target_filename (eg "/system/app/Foo.apk") is located |
| 786 | // on the same filesystem as its top-level directory ("/system"). |
| 787 | // We need something that exists for calling statfs(). |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 788 | std::string target_fs = target_filename; |
| 789 | auto slash_pos = target_fs.find('/', 1); |
| 790 | if (slash_pos != std::string::npos) { |
| 791 | target_fs.resize(slash_pos); |
| 792 | } |
| 793 | |
| 794 | const Value* patch; |
| 795 | if (source_patch_value != NULL) { |
| 796 | source_to_use = source_file; |
| 797 | patch = source_patch_value; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 798 | } else { |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 799 | source_to_use = copy_file; |
| 800 | patch = copy_patch_value; |
| 801 | } |
| 802 | if (patch->type != VAL_BLOB) { |
| 803 | printf("patch is not a blob\n"); |
| 804 | return 1; |
| 805 | } |
| 806 | char* header = patch->data; |
| 807 | ssize_t header_bytes_read = patch->size; |
| 808 | bool use_bsdiff = false; |
| 809 | if (header_bytes_read >= 8 && memcmp(header, "BSDIFF40", 8) == 0) { |
| 810 | use_bsdiff = true; |
| 811 | } else if (header_bytes_read >= 8 && memcmp(header, "IMGDIFF2", 8) == 0) { |
| 812 | use_bsdiff = false; |
| 813 | } else { |
| 814 | printf("Unknown patch file format\n"); |
| 815 | return 1; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 816 | } |
| 817 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 818 | do { |
| 819 | // Is there enough room in the target filesystem to hold the patched |
| 820 | // file? |
| 821 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 822 | if (target_is_partition) { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 823 | // If the target is a partition, we're actually going to |
| 824 | // write the output to /tmp and then copy it to the |
| 825 | // partition. statfs() always returns 0 blocks free for |
| 826 | // /tmp, so instead we'll just assume that /tmp has enough |
| 827 | // space to hold the file. |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 828 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 829 | // We still write the original source to cache, in case |
| 830 | // the partition write is interrupted. |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 831 | if (MakeFreeSpaceOnCache(source_file->data.size()) < 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 832 | printf("not enough free space on /cache\n"); |
| 833 | return 1; |
| 834 | } |
| 835 | if (SaveFileContents(CACHE_TEMP_SOURCE, source_file) < 0) { |
| 836 | printf("failed to back up source file\n"); |
| 837 | return 1; |
| 838 | } |
| 839 | made_copy = 1; |
| 840 | retry = 0; |
| 841 | } else { |
| 842 | int enough_space = 0; |
| 843 | if (retry > 0) { |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 844 | size_t free_space = FreeSpaceForFile(target_fs.c_str()); |
Doug Zongker | 201cd46 | 2010-08-13 09:41:21 -0700 | [diff] [blame] | 845 | enough_space = |
| 846 | (free_space > (256 << 10)) && // 256k (two-block) minimum |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 847 | (free_space > (target_size * 3 / 2)); // 50% margin of error |
Doug Zongker | bf80f49 | 2012-10-19 12:24:26 -0700 | [diff] [blame] | 848 | if (!enough_space) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 849 | printf("target %zu bytes; free space %zu bytes; retry %d; enough %d\n", |
| 850 | target_size, free_space, retry, enough_space); |
Doug Zongker | bf80f49 | 2012-10-19 12:24:26 -0700 | [diff] [blame] | 851 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | if (!enough_space) { |
| 855 | retry = 0; |
| 856 | } |
| 857 | |
| 858 | if (!enough_space && source_patch_value != NULL) { |
| 859 | // Using the original source, but not enough free space. First |
| 860 | // copy the source file to cache, then delete it from the original |
| 861 | // location. |
| 862 | |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 863 | if (strncmp(source_filename, "MTD:", 4) == 0 || |
| 864 | strncmp(source_filename, "EMMC:", 5) == 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 865 | // It's impossible to free space on the target filesystem by |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 866 | // deleting the source if the source is a partition. If |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 867 | // we're ever in a state where we need to do this, fail. |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 868 | printf("not enough free space for target but source is partition\n"); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 869 | return 1; |
| 870 | } |
| 871 | |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 872 | if (MakeFreeSpaceOnCache(source_file->data.size()) < 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 873 | printf("not enough free space on /cache\n"); |
| 874 | return 1; |
| 875 | } |
| 876 | |
| 877 | if (SaveFileContents(CACHE_TEMP_SOURCE, source_file) < 0) { |
| 878 | printf("failed to back up source file\n"); |
| 879 | return 1; |
| 880 | } |
| 881 | made_copy = 1; |
| 882 | unlink(source_filename); |
| 883 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 884 | size_t free_space = FreeSpaceForFile(target_fs.c_str()); |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 885 | printf("(now %zu bytes free for target) ", free_space); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 886 | } |
| 887 | } |
| 888 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 889 | |
| 890 | SinkFn sink = NULL; |
| 891 | void* token = NULL; |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 892 | int output_fd = -1; |
| 893 | if (target_is_partition) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 894 | // We store the decoded output in memory. |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 895 | sink = MemorySink; |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 896 | token = &memory_sink_str; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 897 | } else { |
| 898 | // We write the decoded output to "<tgt-file>.patch". |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 899 | output_fd = ota_open(tmp_target_filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, |
| 900 | S_IRUSR | S_IWUSR); |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 901 | if (output_fd < 0) { |
| 902 | printf("failed to open output file %s: %s\n", tmp_target_filename.c_str(), |
| 903 | strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 904 | return 1; |
| 905 | } |
| 906 | sink = FileSink; |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 907 | token = &output_fd; |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 908 | } |
| 909 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 910 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 911 | SHA1_Init(&ctx); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 912 | |
| 913 | int result; |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 914 | if (use_bsdiff) { |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 915 | result = ApplyBSDiffPatch(source_to_use->data.data(), source_to_use->data.size(), |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 916 | patch, 0, sink, token, &ctx); |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 917 | } else { |
Yabin Cui | d6c93af | 2016-02-10 16:41:10 -0800 | [diff] [blame] | 918 | result = ApplyImagePatch(source_to_use->data.data(), source_to_use->data.size(), |
Doug Zongker | a3ccba6 | 2012-08-20 15:28:02 -0700 | [diff] [blame] | 919 | patch, sink, token, &ctx, bonus_data); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 920 | } |
| 921 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 922 | if (!target_is_partition) { |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 923 | if (ota_fsync(output_fd) != 0) { |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 924 | printf("failed to fsync file \"%s\" (%s)\n", tmp_target_filename.c_str(), |
| 925 | strerror(errno)); |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 926 | result = 1; |
| 927 | } |
Jed Estep | a7b9a46 | 2015-12-15 16:04:53 -0800 | [diff] [blame] | 928 | if (ota_close(output_fd) != 0) { |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 929 | printf("failed to close file \"%s\" (%s)\n", tmp_target_filename.c_str(), |
| 930 | strerror(errno)); |
Michael Runge | be81e51 | 2014-10-29 12:42:15 -0700 | [diff] [blame] | 931 | result = 1; |
| 932 | } |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | if (result != 0) { |
| 936 | if (retry == 0) { |
| 937 | printf("applying patch failed\n"); |
| 938 | return result != 0; |
| 939 | } else { |
| 940 | printf("applying patch failed; retrying\n"); |
| 941 | } |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 942 | if (!target_is_partition) { |
| 943 | unlink(tmp_target_filename.c_str()); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 944 | } |
| 945 | } else { |
| 946 | // succeeded; no need to retry |
| 947 | break; |
| 948 | } |
| 949 | } while (retry-- > 0); |
| 950 | |
Sen Jiang | c48cb5e | 2016-02-04 16:23:21 +0800 | [diff] [blame] | 951 | uint8_t current_target_sha1[SHA_DIGEST_LENGTH]; |
| 952 | SHA1_Final(current_target_sha1, &ctx); |
| 953 | if (memcmp(current_target_sha1, target_sha1, SHA_DIGEST_LENGTH) != 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 954 | printf("patch did not produce expected sha1\n"); |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 955 | return 1; |
Doug Zongker | bf80f49 | 2012-10-19 12:24:26 -0700 | [diff] [blame] | 956 | } else { |
Tao Bao | abba55b | 2015-07-17 18:11:12 -0700 | [diff] [blame] | 957 | printf("now %s\n", short_sha1(target_sha1).c_str()); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 958 | } |
| 959 | |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 960 | if (target_is_partition) { |
Doug Zongker | f291d85 | 2010-07-07 13:55:25 -0700 | [diff] [blame] | 961 | // Copy the temp file to the partition. |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 962 | if (WriteToPartition(reinterpret_cast<const unsigned char*>(memory_sink_str.c_str()), |
| 963 | memory_sink_str.size(), target_filename) != 0) { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 964 | printf("write of patched data to %s failed\n", target_filename); |
| 965 | return 1; |
| 966 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 967 | } else { |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 968 | // Give the .patch file the same owner, group, and mode of the |
| 969 | // original source file. |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 970 | if (chmod(tmp_target_filename.c_str(), source_to_use->st.st_mode) != 0) { |
| 971 | printf("chmod of \"%s\" failed: %s\n", tmp_target_filename.c_str(), strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 972 | return 1; |
| 973 | } |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 974 | if (chown(tmp_target_filename.c_str(), source_to_use->st.st_uid, source_to_use->st.st_gid) != 0) { |
| 975 | printf("chown of \"%s\" failed: %s\n", tmp_target_filename.c_str(), strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 976 | return 1; |
| 977 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 978 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 979 | // Finally, rename the .patch file to replace the target file. |
Yabin Cui | d483c20 | 2016-02-03 17:08:52 -0800 | [diff] [blame] | 980 | if (rename(tmp_target_filename.c_str(), target_filename) != 0) { |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 981 | printf("rename of .patch to \"%s\" failed: %s\n", target_filename, strerror(errno)); |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 982 | return 1; |
| 983 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 984 | } |
| 985 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 986 | // If this run of applypatch created the copy, and we're here, we |
| 987 | // can delete it. |
Tao Bao | ba9a42a | 2015-06-23 23:23:33 -0700 | [diff] [blame] | 988 | if (made_copy) { |
| 989 | unlink(CACHE_TEMP_SOURCE); |
| 990 | } |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 991 | |
Doug Zongker | c4351c7 | 2010-02-22 14:46:32 -0800 | [diff] [blame] | 992 | // Success! |
| 993 | return 0; |
Doug Zongker | 512536a | 2010-02-17 16:11:44 -0800 | [diff] [blame] | 994 | } |