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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/chromeos/settings/owner_key_util.h"
      6 
      7 #include <limits>
      8 
      9 #include "base/file_util.h"
     10 #include "base/logging.h"
     11 #include "base/path_service.h"
     12 #include "base/stl_util.h"
     13 #include "chromeos/chromeos_paths.h"
     14 #include "crypto/rsa_private_key.h"
     15 
     16 namespace chromeos {
     17 
     18 ///////////////////////////////////////////////////////////////////////////
     19 // PublicKey
     20 
     21 PublicKey::PublicKey() {
     22 }
     23 
     24 PublicKey::~PublicKey() {
     25 }
     26 
     27 ///////////////////////////////////////////////////////////////////////////
     28 // PrivateKey
     29 
     30 PrivateKey::PrivateKey(crypto::RSAPrivateKey* key) : key_(key) {
     31 }
     32 
     33 PrivateKey::~PrivateKey() {
     34 }
     35 
     36 ///////////////////////////////////////////////////////////////////////////
     37 // OwnerKeyUtil
     38 
     39 OwnerKeyUtil* OwnerKeyUtil::Create() {
     40   base::FilePath owner_key_path;
     41   CHECK(PathService::Get(chromeos::FILE_OWNER_KEY, &owner_key_path));
     42   return new OwnerKeyUtilImpl(owner_key_path);
     43 }
     44 
     45 OwnerKeyUtil::OwnerKeyUtil() {}
     46 
     47 OwnerKeyUtil::~OwnerKeyUtil() {}
     48 
     49 ///////////////////////////////////////////////////////////////////////////
     50 // OwnerKeyUtilImpl
     51 
     52 OwnerKeyUtilImpl::OwnerKeyUtilImpl(const base::FilePath& key_file)
     53     : key_file_(key_file) {}
     54 
     55 OwnerKeyUtilImpl::~OwnerKeyUtilImpl() {}
     56 
     57 bool OwnerKeyUtilImpl::ImportPublicKey(std::vector<uint8>* output) {
     58   // Get the file size (must fit in a 32 bit int for NSS).
     59   int64 file_size;
     60   if (!base::GetFileSize(key_file_, &file_size)) {
     61     LOG(ERROR) << "Could not get size of " << key_file_.value();
     62     return false;
     63   }
     64   if (file_size > static_cast<int64>(std::numeric_limits<int>::max())) {
     65     LOG(ERROR) << key_file_.value() << "is "
     66                << file_size << "bytes!!!  Too big!";
     67     return false;
     68   }
     69   int32 safe_file_size = static_cast<int32>(file_size);
     70 
     71   output->resize(safe_file_size);
     72 
     73   if (safe_file_size == 0) {
     74     LOG(WARNING) << "Public key file is empty. This seems wrong.";
     75     return false;
     76   }
     77 
     78   // Get the key data off of disk
     79   int data_read = base::ReadFile(
     80       key_file_,
     81       reinterpret_cast<char*>(vector_as_array(output)),
     82       safe_file_size);
     83   return data_read == safe_file_size;
     84 }
     85 
     86 crypto::RSAPrivateKey* OwnerKeyUtilImpl::FindPrivateKey(
     87     const std::vector<uint8>& key) {
     88   return crypto::RSAPrivateKey::FindFromPublicKeyInfo(key);
     89 }
     90 
     91 crypto::RSAPrivateKey* OwnerKeyUtilImpl::FindPrivateKeyInSlot(
     92     const std::vector<uint8>& key,
     93     PK11SlotInfo* slot) {
     94   return crypto::RSAPrivateKey::FindFromPublicKeyInfoInSlot(key, slot);
     95 }
     96 
     97 bool OwnerKeyUtilImpl::IsPublicKeyPresent() {
     98   return base::PathExists(key_file_);
     99 }
    100 
    101 }  // namespace chromeos
    102