src/common/step/security/step_signature.cc

   1 // Copyright (c) 2019 Samsung Electronics Co., Ltd All Rights Reserved
   2 // Use of this source code is governed by an apache 2.0 license that can be
   3 // found in the LICENSE file.
   4
   5 #include "common/step/security/step_signature.h"
   6
   7 #include <pkgmgr_installer.h>
   8
   9 #include <cassert>
  10 #include <cstdlib>
  11 #include <string>
  12
  13 #include "common/certificate_validation.h"
  14 #include "common/utils/file_util.h"
  15
  16 namespace bf = boost::filesystem;
  17 namespace ci = common_installer;
  18
  19 namespace {
  20
  21 pkgmgr_privilege_level ConvertToPkgmgrPrivilegeLevel(ci::PrivilegeLevel level) {
  22   pkgmgr_privilege_level pkgmgr_level;
  23
  24   switch (level) {
  25     case ci::PrivilegeLevel::UNTRUSTED:
  26       pkgmgr_level = PM_PRIVILEGE_UNTRUSTED;
  27       break;
  28     case ci::PrivilegeLevel::PUBLIC:
  29       pkgmgr_level = PM_PRIVILEGE_PUBLIC;
  30       break;
  31     case ci::PrivilegeLevel::PARTNER:
  32       pkgmgr_level = PM_PRIVILEGE_PARTNER;
  33       break;
  34     case ci::PrivilegeLevel::PLATFORM:
  35       pkgmgr_level = PM_PRIVILEGE_PLATFORM;
  36       break;
  37     default:
  38       pkgmgr_level = PM_PRIVILEGE_UNKNOWN;
  39   }
  40
  41   return pkgmgr_level;
  42 }
  43
  44 }  // namespace
  45
  46 namespace common_installer {
  47 namespace security {
  48
  49 Step::Status StepSignature::precheck() {
  50   if (context_->unpacked_dir_path.get().empty()) {
  51     LOG(ERROR) << "unpacked_dir_path attribute is empty";
  52     return Step::Status::INVALID_VALUE;
  53   }
  54   if (!boost::filesystem::exists(context_->unpacked_dir_path.get())) {
  55     LOG(ERROR) << "unpacked_dir_path ("
  56                << context_->unpacked_dir_path.get()
  57                << ") path does not exist";
  58     return Step::Status::INVALID_VALUE;
  59   }
  60
  61   if (save_signature_ && context_->pkgid.get().empty())
  62     return Step::Status::INVALID_VALUE;
  63
  64   return Step::Status::OK;
  65 }
  66
  67 boost::filesystem::path StepSignature::GetSignatureRoot() const {
  68   return context_->unpacked_dir_path.get();
  69 }
  70
  71 Step::Status StepSignature::CheckPrivilegeLevel(PrivilegeLevel level) {
  72   std::string error_message;
  73   if (!context_->is_readonly_package.get()) {
  74     if (!ValidatePrivilegeLevel(level, context_->uid.get(),
  75         context_->manifest_data.get()->api_version,
  76         context_->manifest_data.get()->privileges, &error_message)) {
  77       if (!error_message.empty()) {
  78         LOG(ERROR) << "error_message: " << error_message;
  79         on_error(Status::SIGNATURE_ERROR, error_message);
  80       }
  81       return Status::SIGNATURE_ERROR;
  82     }
  83   }
  84   return Status::OK;
  85 }
  86
  87 Step::Status StepSignature::process() {
  88   signature_ = std::unique_ptr<Signature>(
  89       new Signature(context_->request_type.get(),
  90                     context_->pkgid.get(),
  91                     context_->is_readonly_package.get(),
  92                     context_->skip_check_reference.get(),
  93                     &context_->certificate_info.get()));
  94   PrivilegeLevel level = PrivilegeLevel::UNTRUSTED;
  95   std::string error_message;
  96   if (!signature_->GetPrivilegeLevel(GetSignatureRoot(),
  97       &level, &error_message)) {
  98     on_error(Status::CERT_ERROR, error_message);
  99     return Status::CERT_ERROR;
 100   }
 101
 102   if (level == PrivilegeLevel::UNTRUSTED) {
 103     std::string error_message =
 104         "Unsigned applications can not be installed";
 105     on_error(Status::SIGNATURE_ERROR, error_message);
 106     return Status::SIGNATURE_ERROR;
 107   }
 108
 109   LOG(INFO) << "Privilege level: " << PrivilegeLevelToString(level);
 110   context_->privilege_level.set(level);
 111
 112   pkgmgr_installer_set_privilege_level(ConvertToPkgmgrPrivilegeLevel(level));
 113
 114   Status status = CheckPrivilegeLevel(level);
 115   if (status != Status::OK)
 116     return status;
 117
 118   if (!signature_->CheckMetadataPrivilege(level, context_->manifest_data.get(),
 119                                           &error_message)) {
 120     if (!error_message.empty()) {
 121       LOG(ERROR) << "error_message: " << error_message;
 122       on_error(Status::SIGNATURE_ERROR, error_message);
 123     }
 124     return Status::SIGNATURE_ERROR;
 125   }
 126
 127   if (save_signature_) {
 128     if (!signature_->SaveSignature(context_->unpacked_dir_path.get()))
 129       return Step::Status::OK;
 130   }
 131
 132   return Step::Status::OK;
 133 }
 134
 135 Step::Status StepSignature::undo() {
 136   bf::remove(signature_->GetFilePath());
 137   if (bf::exists(signature_->GetBackupPath()))
 138     bf::rename(signature_->GetBackupPath(), signature_->GetFilePath());
 139
 140   return Step::Status::OK;
 141 }
 142
 143 Step::Status StepSignature::clean() {
 144   Remove(signature_->GetBackupPath());
 145
 146   return Step::Status::OK;
 147 }
 148
 149 }  // namespace security
 150 }  // namespace common_installer