1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/extension_creator.h"
#include <stddef.h>
#include <string>
#include <vector>
#include "base/files/file_util.h"
#include "base/files/scoped_file.h"
#include "base/files/scoped_temp_dir.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/strings/string_util.h"
#include "components/crx_file/crx_creator.h"
#include "components/crx_file/id_util.h"
#include "crypto/rsa_private_key.h"
#include "crypto/signature_creator.h"
#include "extensions/browser/extension_creator_filter.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_l10n_util.h"
#include "extensions/common/file_util.h"
#include "extensions/strings/grit/extensions_strings.h"
#include "third_party/zlib/google/zip.h"
#include "ui/base/l10n/l10n_util.h"
namespace {
const int kRSAKeySize = 2048;
}
namespace extensions {
ExtensionCreator::ExtensionCreator() : error_type_(kOtherError) {}
bool ExtensionCreator::InitializeInput(
const base::FilePath& extension_dir,
const base::FilePath& crx_path,
const base::FilePath& private_key_path,
const base::FilePath& private_key_output_path,
int run_flags) {
// Validate input |extension_dir|.
if (extension_dir.value().empty() || !base::DirectoryExists(extension_dir)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_DIRECTORY_NO_EXISTS);
return false;
}
base::FilePath absolute_extension_dir =
base::MakeAbsoluteFilePath(extension_dir);
if (absolute_extension_dir.empty()) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_CANT_GET_ABSOLUTE_PATH);
return false;
}
// Validate input |private_key| (if provided).
if (!private_key_path.value().empty() &&
!base::PathExists(private_key_path)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_INVALID_PATH);
return false;
}
// If an |output_private_key| path is given, make sure it doesn't over-write
// an existing private key.
if (private_key_path.value().empty() &&
!private_key_output_path.value().empty() &&
base::PathExists(private_key_output_path)) {
error_message_ = l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_EXISTS);
return false;
}
// Check whether crx file already exists. Should be last check, as this is
// a warning only.
if (!(run_flags & kOverwriteCRX) && base::PathExists(crx_path)) {
error_message_ = l10n_util::GetStringUTF8(IDS_EXTENSION_CRX_EXISTS);
error_type_ = kCRXExists;
return false;
}
return true;
}
bool ExtensionCreator::ValidateExtension(const base::FilePath& extension_dir,
int run_flags) {
int create_flags =
Extension::FOLLOW_SYMLINKS_ANYWHERE | Extension::ERROR_ON_PRIVATE_KEY;
if (run_flags & kRequireModernManifestVersion) {
create_flags |= Extension::REQUIRE_MODERN_MANIFEST_VERSION;
}
// Loading the extension does a lot of useful validation of the structure.
scoped_refptr<Extension> extension(file_util::LoadExtension(
extension_dir, mojom::ManifestLocation::kInternal,
create_flags, &error_message_));
return !!extension.get() && extension_l10n_util::ValidateExtensionLocales(
extension_dir, *extension.get()->manifest()->value(), &error_message_);
}
std::unique_ptr<crypto::RSAPrivateKey> ExtensionCreator::ReadInputKey(
const base::FilePath& private_key_path) {
if (!base::PathExists(private_key_path)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_NO_EXISTS);
return nullptr;
}
std::string private_key_contents;
if (!base::ReadFileToString(private_key_path, &private_key_contents)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_FAILED_TO_READ);
return nullptr;
}
std::string private_key_bytes;
if (!Extension::ParsePEMKeyBytes(private_key_contents, &private_key_bytes)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_INVALID);
return nullptr;
}
std::unique_ptr<crypto::RSAPrivateKey> private_key =
crypto::RSAPrivateKey::CreateFromPrivateKeyInfo(std::vector<uint8_t>(
private_key_bytes.begin(), private_key_bytes.end()));
if (!private_key) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_INVALID_FORMAT);
return nullptr;
}
return private_key;
}
std::unique_ptr<crypto::RSAPrivateKey> ExtensionCreator::GenerateKey(
const base::FilePath& output_private_key_path) {
std::unique_ptr<crypto::RSAPrivateKey> key_pair(
crypto::RSAPrivateKey::Create(kRSAKeySize));
if (!key_pair) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_FAILED_TO_GENERATE);
return nullptr;
}
std::vector<uint8_t> private_key_vector;
if (!key_pair->ExportPrivateKey(&private_key_vector)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_FAILED_TO_EXPORT);
return nullptr;
}
std::string private_key_bytes(
reinterpret_cast<char*>(&private_key_vector.front()),
private_key_vector.size());
std::string private_key;
if (!Extension::ProducePEM(private_key_bytes, &private_key)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_FAILED_TO_OUTPUT);
return nullptr;
}
std::string pem_output;
if (!Extension::FormatPEMForFileOutput(private_key, &pem_output, false)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_FAILED_TO_OUTPUT);
return nullptr;
}
if (!output_private_key_path.empty()) {
if (!base::WriteFile(output_private_key_path, pem_output)) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_PRIVATE_KEY_FAILED_TO_OUTPUT);
return nullptr;
}
}
return key_pair;
}
bool ExtensionCreator::CreateZip(const base::FilePath& extension_dir,
const base::FilePath& temp_path,
base::FilePath* zip_path) {
*zip_path = temp_path.Append(FILE_PATH_LITERAL("extension.zip"));
scoped_refptr<ExtensionCreatorFilter> filter =
base::MakeRefCounted<ExtensionCreatorFilter>(extension_dir);
zip::FilterCallback filter_cb =
base::BindRepeating(&ExtensionCreatorFilter::ShouldPackageFile, filter);
// TODO(crbug.com/40584446): Surface a warning to the user for files excluded
// from being packed.
if (!zip::ZipWithFilterCallback(extension_dir, *zip_path,
std::move(filter_cb))) {
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_FAILED_DURING_PACKAGING);
return false;
}
return true;
}
bool ExtensionCreator::CreateCrx(
const base::FilePath& zip_path,
crypto::RSAPrivateKey* private_key,
const base::FilePath& crx_path,
const std::optional<std::string>& compressed_verified_contents) {
crx_file::CreatorResult result;
if (compressed_verified_contents.has_value()) {
result = crx_file::CreateCrxWithVerifiedContentsInHeader(
crx_path, zip_path, private_key, compressed_verified_contents.value());
} else {
result = crx_file::Create(crx_path, zip_path, private_key);
}
switch (result) {
case crx_file::CreatorResult::OK:
return true;
case crx_file::CreatorResult::ERROR_SIGNING_FAILURE:
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_ERROR_WHILE_SIGNING);
return false;
case crx_file::CreatorResult::ERROR_FILE_NOT_WRITABLE:
error_message_ =
l10n_util::GetStringUTF8(IDS_EXTENSION_SHARING_VIOLATION);
return false;
case crx_file::CreatorResult::ERROR_FILE_NOT_READABLE:
case crx_file::CreatorResult::ERROR_FILE_WRITE_FAILURE:
return false;
}
return false;
}
bool ExtensionCreator::CreateCrxAndPerformCleanup(
const base::FilePath& extension_dir,
const base::FilePath& crx_path,
crypto::RSAPrivateKey* private_key,
const std::optional<std::string>& compressed_verified_contents) {
base::ScopedTempDir temp_dir;
if (!temp_dir.CreateUniqueTempDir()) {
return false;
}
base::FilePath zip_path;
bool result =
CreateZip(extension_dir, temp_dir.GetPath(), &zip_path) &&
CreateCrx(zip_path, private_key, crx_path, compressed_verified_contents);
base::DeleteFile(zip_path);
return result;
}
bool ExtensionCreator::Run(const base::FilePath& extension_dir,
const base::FilePath& crx_path,
const base::FilePath& private_key_path,
const base::FilePath& output_private_key_path,
int run_flags) {
// Check input diretory and read manifest.
if (!InitializeInput(extension_dir, crx_path, private_key_path,
output_private_key_path, run_flags)) {
return false;
}
if (!ValidateExtension(extension_dir, run_flags)) {
return false;
}
// Initialize Key Pair
std::unique_ptr<crypto::RSAPrivateKey> key_pair;
if (!private_key_path.value().empty()) {
key_pair = ReadInputKey(private_key_path);
} else {
key_pair = GenerateKey(output_private_key_path);
}
if (!key_pair) {
DCHECK(!error_message_.empty()) << "Set proper error message.";
return false;
}
return CreateCrxAndPerformCleanup(extension_dir, crx_path, key_pair.get(),
std::nullopt);
}
} // namespace extensions
|