| // Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "update_engine/omaha_request_params.h" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/utsname.h> |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/string_util.h" |
| #include "update_engine/simple_key_value_store.h" |
| #include "update_engine/utils.h" |
| |
| using std::map; |
| using std::string; |
| |
| namespace { |
| const string OmahaIdPath() { |
| return string(chromeos_update_engine::utils::kStatefulPartition) + |
| "/etc/omaha_id"; |
| } |
| } // namespace {} |
| |
| namespace chromeos_update_engine { |
| |
| const char* const OmahaRequestParams::kAppId( |
| "{87efface-864d-49a5-9bb3-4b050a7c227a}"); |
| const char* const OmahaRequestParams::kOsPlatform("Chrome OS"); |
| const char* const OmahaRequestParams::kOsVersion("Indy"); |
| const char* const OmahaRequestParams::kUpdateUrl( |
| "https://tools.google.com/service/update2"); |
| |
| bool OmahaRequestDeviceParams::Init(const std::string& in_app_version, |
| const std::string& in_update_url) { |
| TEST_AND_RETURN_FALSE(GetMachineId(&machine_id)); |
| user_id = machine_id; |
| os_platform = OmahaRequestParams::kOsPlatform; |
| os_version = OmahaRequestParams::kOsVersion; |
| app_version = in_app_version.empty() ? |
| GetLsbValue("CHROMEOS_RELEASE_VERSION", "") : in_app_version; |
| os_sp = app_version + "_" + GetMachineType(); |
| os_board = GetLsbValue("CHROMEOS_RELEASE_BOARD", ""); |
| app_id = OmahaRequestParams::kAppId; |
| app_lang = "en-US"; |
| app_track = GetLsbValue("CHROMEOS_RELEASE_TRACK", ""); |
| struct stat stbuf; |
| |
| // Deltas are only okay if the /.nodelta file does not exist. |
| // If we don't know (i.e. stat() returns some unexpected error), |
| // then err on the side of caution and say deltas are not okay |
| delta_okay = (stat((root_ + "/.nodelta").c_str(), &stbuf) < 0) && |
| (errno == ENOENT); |
| |
| update_url = in_update_url.empty() ? |
| GetLsbValue("CHROMEOS_AUSERVER", OmahaRequestParams::kUpdateUrl) : |
| in_update_url; |
| return true; |
| } |
| |
| namespace { |
| const size_t kGuidDataByteLength = 128 / 8; |
| const string::size_type kGuidStringLength = 38; |
| // Formats 16 bytes (128 bits) of data as a GUID: |
| // "{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}" where X is a hex digit |
| string GuidFromData(const unsigned char data[kGuidDataByteLength]) { |
| return StringPrintf( |
| "{%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X}", |
| data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7], |
| data[8], data[9], data[10], data[11], data[12], data[13], data[14], |
| data[15]); |
| } |
| } |
| |
| // Returns true on success. |
| bool OmahaRequestDeviceParams::GetMachineId(std::string* out_id) const { |
| // Checks if we have an existing Machine ID. |
| const string omaha_id_path = root_ + OmahaIdPath(); |
| |
| if (utils::ReadFileToString(omaha_id_path, out_id) && |
| out_id->size() == kGuidStringLength) { |
| return true; |
| } |
| |
| // Creates a new ID. |
| int rand_fd = open("/dev/urandom", O_RDONLY, 0); |
| TEST_AND_RETURN_FALSE_ERRNO(rand_fd >= 0); |
| ScopedFdCloser rand_fd_closer(&rand_fd); |
| unsigned char buf[kGuidDataByteLength]; |
| size_t bytes_read = 0; |
| while (bytes_read < sizeof(buf)) { |
| ssize_t rc = read(rand_fd, buf + bytes_read, sizeof(buf) - bytes_read); |
| TEST_AND_RETURN_FALSE_ERRNO(rc > 0); |
| bytes_read += rc; |
| } |
| string guid = GuidFromData(buf); |
| TEST_AND_RETURN_FALSE( |
| utils::WriteFile(omaha_id_path.c_str(), guid.data(), guid.size())); |
| *out_id = guid; |
| return true; |
| } |
| |
| string OmahaRequestDeviceParams::GetLsbValue( |
| const string& key, const string& default_value) const { |
| string files[] = {string(utils::kStatefulPartition) + "/etc/lsb-release", |
| "/etc/lsb-release"}; |
| for (unsigned int i = 0; i < arraysize(files); ++i) { |
| // TODO(adlr): make sure files checked are owned as root (and all |
| // their parents are recursively, too). |
| string file_data; |
| if (!utils::ReadFileToString(root_ + files[i], &file_data)) |
| continue; |
| |
| map<string, string> data = simple_key_value_store::ParseString(file_data); |
| if (utils::MapContainsKey(data, key)) |
| return data[key]; |
| } |
| // not found |
| return default_value; |
| } |
| |
| string OmahaRequestDeviceParams::GetMachineType() const { |
| struct utsname buf; |
| string ret; |
| if (uname(&buf) == 0) |
| ret = buf.machine; |
| return ret; |
| } |
| |
| } // namespace chromeos_update_engine |