The Tor Browser / file comparison
comparison: toolkit/components/maintenanceservice/registrycertificates.cpp
toolkit/components/maintenanceservice/registrycertificates.cpp
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:b83c4c25becc |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include <stdio.h> | |
| 6 #include <stdlib.h> | |
| 7 #include <windows.h> | |
| 8 | |
| 9 #include "registrycertificates.h" | |
| 10 #include "pathhash.h" | |
| 11 #include "nsWindowsHelpers.h" | |
| 12 #include "servicebase.h" | |
| 13 #include "updatehelper.h" | |
| 14 #define MAX_KEY_LENGTH 255 | |
| 15 | |
| 16 /** | |
| 17 * Verifies if the file path matches any certificate stored in the registry. | |
| 18 * | |
| 19 * @param filePath The file path of the application to check if allowed. | |
| 20 * @return TRUE if the binary matches any of the allowed certificates. | |
| 21 */ | |
| 22 BOOL | |
| 23 DoesBinaryMatchAllowedCertificates(LPCWSTR basePathForUpdate, LPCWSTR filePath) | |
| 24 { | |
| 25 WCHAR maintenanceServiceKey[MAX_PATH + 1]; | |
| 26 if (!CalculateRegistryPathFromFilePath(basePathForUpdate, | |
| 27 maintenanceServiceKey)) { | |
| 28 return FALSE; | |
| 29 } | |
| 30 | |
| 31 // We use KEY_WOW64_64KEY to always force 64-bit view. | |
| 32 // The user may have both x86 and x64 applications installed | |
| 33 // which each register information. We need a consistent place | |
| 34 // to put those certificate attributes in and hence why we always | |
| 35 // force the non redirected registry under Wow6432Node. | |
| 36 // This flag is ignored on 32bit systems. | |
| 37 HKEY baseKeyRaw; | |
| 38 LONG retCode = RegOpenKeyExW(HKEY_LOCAL_MACHINE, | |
| 39 maintenanceServiceKey, 0, | |
| 40 KEY_READ | KEY_WOW64_64KEY, &baseKeyRaw); | |
| 41 if (retCode != ERROR_SUCCESS) { | |
| 42 LOG_WARN(("Could not open key. (%d)", retCode)); | |
| 43 // Our tests run with a different apply directory for each test. | |
| 44 // We use this registry key on our test slaves to store the | |
| 45 // allowed name/issuers. | |
| 46 retCode = RegOpenKeyExW(HKEY_LOCAL_MACHINE, | |
| 47 TEST_ONLY_FALLBACK_KEY_PATH, 0, | |
| 48 KEY_READ | KEY_WOW64_64KEY, &baseKeyRaw); | |
| 49 if (retCode != ERROR_SUCCESS) { | |
| 50 LOG_WARN(("Could not open fallback key. (%d)", retCode)); | |
| 51 return FALSE; | |
| 52 } | |
| 53 } | |
| 54 nsAutoRegKey baseKey(baseKeyRaw); | |
| 55 | |
| 56 // Get the number of subkeys. | |
| 57 DWORD subkeyCount = 0; | |
| 58 retCode = RegQueryInfoKeyW(baseKey, nullptr, nullptr, nullptr, &subkeyCount, | |
| 59 nullptr, nullptr, nullptr, nullptr, nullptr, | |
| 60 nullptr, nullptr); | |
| 61 if (retCode != ERROR_SUCCESS) { | |
| 62 LOG_WARN(("Could not query info key. (%d)", retCode)); | |
| 63 return FALSE; | |
| 64 } | |
| 65 | |
| 66 // Enumerate the subkeys, each subkey represents an allowed certificate. | |
| 67 for (DWORD i = 0; i < subkeyCount; i++) { | |
| 68 WCHAR subkeyBuffer[MAX_KEY_LENGTH]; | |
| 69 DWORD subkeyBufferCount = MAX_KEY_LENGTH; | |
| 70 retCode = RegEnumKeyExW(baseKey, i, subkeyBuffer, | |
| 71 &subkeyBufferCount, nullptr, | |
| 72 nullptr, nullptr, nullptr); | |
| 73 if (retCode != ERROR_SUCCESS) { | |
| 74 LOG_WARN(("Could not enum certs. (%d)", retCode)); | |
| 75 return FALSE; | |
| 76 } | |
| 77 | |
| 78 // Open the subkey for the current certificate | |
| 79 HKEY subKeyRaw; | |
| 80 retCode = RegOpenKeyExW(baseKey, | |
| 81 subkeyBuffer, | |
| 82 0, | |
| 83 KEY_READ | KEY_WOW64_64KEY, | |
| 84 &subKeyRaw); | |
| 85 nsAutoRegKey subKey(subKeyRaw); | |
| 86 if (retCode != ERROR_SUCCESS) { | |
| 87 LOG_WARN(("Could not open subkey. (%d)", retCode)); | |
| 88 continue; // Try the next subkey | |
| 89 } | |
| 90 | |
| 91 const int MAX_CHAR_COUNT = 256; | |
| 92 DWORD valueBufSize = MAX_CHAR_COUNT * sizeof(WCHAR); | |
| 93 WCHAR name[MAX_CHAR_COUNT] = { L'\0' }; | |
| 94 WCHAR issuer[MAX_CHAR_COUNT] = { L'\0' }; | |
| 95 | |
| 96 // Get the name from the registry | |
| 97 retCode = RegQueryValueExW(subKey, L"name", 0, nullptr, | |
| 98 (LPBYTE)name, &valueBufSize); | |
| 99 if (retCode != ERROR_SUCCESS) { | |
| 100 LOG_WARN(("Could not obtain name from registry. (%d)", retCode)); | |
| 101 continue; // Try the next subkey | |
| 102 } | |
| 103 | |
| 104 // Get the issuer from the registry | |
| 105 valueBufSize = MAX_CHAR_COUNT * sizeof(WCHAR); | |
| 106 retCode = RegQueryValueExW(subKey, L"issuer", 0, nullptr, | |
| 107 (LPBYTE)issuer, &valueBufSize); | |
| 108 if (retCode != ERROR_SUCCESS) { | |
| 109 LOG_WARN(("Could not obtain issuer from registry. (%d)", retCode)); | |
| 110 continue; // Try the next subkey | |
| 111 } | |
| 112 | |
| 113 CertificateCheckInfo allowedCertificate = { | |
| 114 name, | |
| 115 issuer, | |
| 116 }; | |
| 117 | |
| 118 retCode = CheckCertificateForPEFile(filePath, allowedCertificate); | |
| 119 if (retCode != ERROR_SUCCESS) { | |
| 120 LOG_WARN(("Error on certificate check. (%d)", retCode)); | |
| 121 continue; // Try the next subkey | |
| 122 } | |
| 123 | |
| 124 retCode = VerifyCertificateTrustForFile(filePath); | |
| 125 if (retCode != ERROR_SUCCESS) { | |
| 126 LOG_WARN(("Error on certificate trust check. (%d)", retCode)); | |
| 127 continue; // Try the next subkey | |
| 128 } | |
| 129 | |
| 130 // Raise the roof, we found a match! | |
| 131 return TRUE; | |
| 132 } | |
| 133 | |
| 134 // No certificates match, :'( | |
| 135 return FALSE; | |
| 136 } |
