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| 1 // Copyright 2006-2009 Google Inc. | |
| 2 // | |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 // you may not use this file except in compliance with the License. | |
| 5 // You may obtain a copy of the License at | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 9 // Unless required by applicable law or agreed to in writing, software | |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 // See the License for the specific language governing permissions and | |
| 13 // limitations under the License. | |
| 14 // ======================================================================== | |
| 15 | |
| 16 | |
| 17 #include "omaha/base/encrypt.h" | |
| 18 | |
| 19 #include <vector> | |
| 20 #include "omaha/base/debug.h" | |
| 21 #include "omaha/base/error.h" | |
| 22 | |
| 23 namespace omaha { | |
| 24 | |
| 25 namespace encrypt { | |
| 26 | |
| 27 // TODO(omaha): consider loading crypt32.dll dynamically, as these functions | |
| 28 // are used infrequently. | |
| 29 | |
| 30 HRESULT EncryptData(const void* key, size_t key_len, | |
| 31 const void* data, size_t data_len, | |
| 32 std::vector<uint8>* data_out) { | |
| 33 // key may be null. | |
| 34 ASSERT1(data); | |
| 35 ASSERT1(data_out); | |
| 36 DATA_BLOB blob_out = {0, NULL}; | |
| 37 DATA_BLOB blob_in = { data_len, static_cast<BYTE*>(const_cast<void*>(data)) }; | |
| 38 DATA_BLOB entropy = { 0, NULL }; | |
| 39 if (key != NULL && key_len != 0) { | |
| 40 entropy.cbData = key_len; | |
| 41 entropy.pbData = static_cast<BYTE*>(const_cast<void*>(key)); | |
| 42 } | |
| 43 | |
| 44 // The description parameter is required on W2K. | |
| 45 if (!::CryptProtectData(&blob_in, _T("gupdate"), &entropy, NULL, NULL, | |
| 46 CRYPTPROTECT_UI_FORBIDDEN, &blob_out)) { | |
| 47 return HRESULTFromLastError(); | |
| 48 } | |
| 49 | |
| 50 data_out->clear(); | |
| 51 const uint8* first = reinterpret_cast<const uint8*>(blob_out.pbData); | |
| 52 const uint8* last = first + blob_out.cbData; | |
| 53 data_out->insert(data_out->begin(), first, last); | |
| 54 ::LocalFree(blob_out.pbData); | |
| 55 | |
| 56 ASSERT1(data_out->size() == blob_out.cbData); | |
| 57 return S_OK; | |
| 58 } | |
| 59 | |
| 60 HRESULT DecryptData(const void* key, size_t key_len, | |
| 61 const void* data, size_t data_len, | |
| 62 std::vector<uint8>* data_out) { | |
| 63 // key may be null. | |
| 64 ASSERT1(data); | |
| 65 ASSERT1(data_out); | |
| 66 | |
| 67 DATA_BLOB blob_out = {0, NULL}; | |
| 68 DATA_BLOB blob_in = { data_len, static_cast<BYTE*>(const_cast<void*>(data)) }; | |
| 69 DATA_BLOB entropy = { 0, NULL }; | |
| 70 | |
| 71 if (key != NULL && key_len != 0) { | |
| 72 entropy.cbData = key_len; | |
| 73 entropy.pbData = static_cast<BYTE*>(const_cast<void*>(key)); | |
| 74 } | |
| 75 | |
| 76 if (!::CryptUnprotectData(&blob_in, NULL, &entropy, NULL, NULL, | |
| 77 CRYPTPROTECT_UI_FORBIDDEN, &blob_out)) { | |
| 78 return (::GetLastError() != ERROR_SUCCESS) ? | |
| 79 HRESULTFromLastError() : HRESULT_FROM_WIN32(ERROR_INVALID_DATA); | |
| 80 } | |
| 81 | |
| 82 data_out->clear(); | |
| 83 const uint8* first = reinterpret_cast<const uint8*>(blob_out.pbData); | |
| 84 const uint8* last = first + blob_out.cbData; | |
| 85 data_out->insert(data_out->begin(), first, last); | |
| 86 ::LocalFree(blob_out.pbData); | |
| 87 | |
| 88 ASSERT1(data_out->size() == blob_out.cbData); | |
| 89 return S_OK; | |
| 90 } | |
| 91 | |
| 92 } // namespace encrypt | |
| 93 | |
| 94 } // namespace omaha | |
| 95 | |
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Chromium Code Reviews
Issue 624713003:
Keep only base/extractor.[cc|h]. (Closed)
Base URL: https://chromium.googlesource.com/external/omaha.git@master