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jonsimantovjonsimantov
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Fix nesting.
1 parent 6208c96 commit d70c338

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+165
-167
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+165
-167
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‎analytics/src/analytics_windows.cc‎

Lines changed: 165 additions & 167 deletions
Original file line numberDiff line numberDiff line change
@@ -19,7 +19,6 @@
1919

2020
#include <cstdlib>
2121
#include <cstring>
22-
// #include <limits> // No longer needed
2322
#include <string>
2423
#include <vector>
2524

@@ -89,212 +88,211 @@ static std::wstring GetExecutablePath() {
8988
}
9089
}
9190
}
91+
}
92+
93+
// Helper function to calculate SHA256 hash of a file.
94+
static std::vector<BYTE> CalculateFileSha256(HANDLE hFile) {
95+
HCRYPTPROV hProv = 0;
96+
HCRYPTHASH hHash = 0;
97+
std::vector<BYTE> result_hash_value;
98+
99+
if (SetFilePointer(hFile, 0, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
100+
DWORD dwError = GetLastError();
101+
LogError(LOG_TAG "CalculateFileSha256.SetFilePointer failed. Error: %u",
102+
dwError);
103+
return result_hash_value;
104+
}
92105

93-
// Helper function to calculate SHA256 hash of a file.
94-
static std::vector<BYTE> CalculateFileSha256(HANDLE hFile) {
95-
HCRYPTPROV hProv = 0;
96-
HCRYPTHASH hHash = 0;
97-
std::vector<BYTE> result_hash_value;
98-
99-
if (SetFilePointer(hFile, 0, NULL, FILE_BEGIN) ==
100-
INVALID_SET_FILE_POINTER) {
101-
DWORD dwError = GetLastError();
102-
LogError(LOG_TAG "CalculateFileSha256.SetFilePointer failed. Error: %u",
103-
dwError);
104-
return result_hash_value;
105-
}
106-
107-
// Acquire Crypto Provider.
108-
// Using CRYPT_VERIFYCONTEXT for operations that don't require private key
109-
// access.
110-
if (!CryptAcquireContextW(&hProv, NULL, NULL, PROV_RSA_AES,
111-
CRYPT_VERIFYCONTEXT)) {
112-
DWORD dwError = GetLastError();
113-
LogError(LOG_TAG
114-
"CalculateFileSha256.CryptAcquireContextW failed. Error: %u",
115-
dwError);
116-
return result_hash_value;
117-
}
118-
119-
if (!CryptCreateHash(hProv, CALG_SHA_256, 0, 0, &hHash)) {
120-
DWORD dwError = GetLastError();
121-
LogError(LOG_TAG "CalculateFileSha256.CryptCreateHash failed. Error: %u",
122-
dwError);
123-
CryptReleaseContext(hProv, 0);
124-
return result_hash_value;
125-
}
106+
// Acquire Crypto Provider.
107+
// Using CRYPT_VERIFYCONTEXT for operations that don't require private key
108+
// access.
109+
if (!CryptAcquireContextW(&hProv, NULL, NULL, PROV_RSA_AES,
110+
CRYPT_VERIFYCONTEXT)) {
111+
DWORD dwError = GetLastError();
112+
LogError(LOG_TAG
113+
"CalculateFileSha256.CryptAcquireContextW failed. Error: %u",
114+
dwError);
115+
return result_hash_value;
116+
}
126117

127-
BYTE rgbFile[1024];
128-
DWORD cbRead = 0;
129-
BOOL bReadSuccessLoop = TRUE;
118+
if (!CryptCreateHash(hProv, CALG_SHA_256, 0, 0, &hHash)) {
119+
DWORD dwError = GetLastError();
120+
LogError(LOG_TAG "CalculateFileSha256.CryptCreateHash failed. Error: %u",
121+
dwError);
122+
CryptReleaseContext(hProv, 0);
123+
return result_hash_value;
124+
}
130125

131-
while (true) {
132-
bReadSuccessLoop =
133-
ReadFile(hFile, rgbFile, sizeof(rgbFile), &cbRead, NULL);
134-
if (!bReadSuccessLoop) {
135-
DWORD dwError = GetLastError();
136-
LogError(LOG_TAG "CalculateFileSha256.ReadFile failed. Error: %u",
137-
dwError);
138-
CryptDestroyHash(hHash);
139-
CryptReleaseContext(hProv, 0);
140-
return result_hash_value;
141-
}
142-
if (cbRead == 0) {
143-
break;
144-
}
145-
if (!CryptHashData(hHash, rgbFile, cbRead, 0)) {
146-
DWORD dwError = GetLastError();
147-
LogError(LOG_TAG "CalculateFileSha256.CryptHashData failed. Error: %u",
148-
dwError);
149-
CryptDestroyHash(hHash);
150-
CryptReleaseContext(hProv, 0);
151-
return result_hash_value;
152-
}
153-
}
126+
BYTE rgbFile[1024];
127+
DWORD cbRead = 0;
128+
BOOL bReadSuccessLoop = TRUE;
154129

155-
DWORD cbHashValue = 0;
156-
DWORD dwCount = sizeof(DWORD);
157-
if (!CryptGetHashParam(hHash, HP_HASHSIZE, (BYTE*)&cbHashValue, &dwCount,
158-
0)) {
130+
while (true) {
131+
bReadSuccessLoop = ReadFile(hFile, rgbFile, sizeof(rgbFile), &cbRead, NULL);
132+
if (!bReadSuccessLoop) {
159133
DWORD dwError = GetLastError();
160-
LogError(LOG_TAG
161-
"CalculateFileSha256.CryptGetHashParam "
162-
"(HP_HASHSIZE) failed. Error: "
163-
"%u",
134+
LogError(LOG_TAG "CalculateFileSha256.ReadFile failed. Error: %u",
164135
dwError);
165136
CryptDestroyHash(hHash);
166137
CryptReleaseContext(hProv, 0);
167138
return result_hash_value;
168139
}
169-
170-
result_hash_value.resize(cbHashValue);
171-
if (!CryptGetHashParam(hHash, HP_HASHVAL, result_hash_value.data(),
172-
&cbHashValue, 0)) {
140+
if (cbRead == 0) {
141+
break;
142+
}
143+
if (!CryptHashData(hHash, rgbFile, cbRead, 0)) {
173144
DWORD dwError = GetLastError();
174-
LogError(LOG_TAG
175-
"CalculateFileSha256.CryptGetHashParam (HP_HASHVAL) failed. "
176-
"Error: %u",
145+
LogError(LOG_TAG "CalculateFileSha256.CryptHashData failed. Error: %u",
177146
dwError);
178-
result_hash_value.clear();
179147
CryptDestroyHash(hHash);
180148
CryptReleaseContext(hProv, 0);
181149
return result_hash_value;
182150
}
151+
}
183152

153+
DWORD cbHashValue = 0;
154+
DWORD dwCount = sizeof(DWORD);
155+
if (!CryptGetHashParam(hHash, HP_HASHSIZE, (BYTE*)&cbHashValue, &dwCount,
156+
0)) {
157+
DWORD dwError = GetLastError();
158+
LogError(LOG_TAG
159+
"CalculateFileSha256.CryptGetHashParam "
160+
"(HP_HASHSIZE) failed. Error: "
161+
"%u",
162+
dwError);
184163
CryptDestroyHash(hHash);
185164
CryptReleaseContext(hProv, 0);
186165
return result_hash_value;
187166
}
188167

189-
HMODULE VerifyAndLoadAnalyticsLibrary(
190-
const wchar_t* library_filename, // This is expected to be just the DLL
191-
// filename e.g. "analytics_win.dll"
192-
const unsigned char* expected_hash, size_t expected_hash_size) {
193-
if (library_filename == nullptr || library_filename[0] == L'\0') {
194-
LogError(LOG_TAG "Invalid arguments.");
195-
return nullptr;
196-
}
197-
if (expected_hash == nullptr || expected_hash_size == 0) {
198-
// Don't check the hash, just load the library.
199-
return LoadLibraryExW(library_filename, NULL,
200-
LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
201-
}
168+
result_hash_value.resize(cbHashValue);
169+
if (!CryptGetHashParam(hHash, HP_HASHVAL, result_hash_value.data(),
170+
&cbHashValue, 0)) {
171+
DWORD dwError = GetLastError();
172+
LogError(LOG_TAG
173+
"CalculateFileSha256.CryptGetHashParam (HP_HASHVAL) failed. "
174+
"Error: %u",
175+
dwError);
176+
result_hash_value.clear();
177+
CryptDestroyHash(hHash);
178+
CryptReleaseContext(hProv, 0);
179+
return result_hash_value;
180+
}
202181

203-
std::wstring executable_path_str = GetExecutablePath();
182+
CryptDestroyHash(hHash);
183+
CryptReleaseContext(hProv, 0);
184+
return result_hash_value;
185+
}
186+
187+
HMODULE VerifyAndLoadAnalyticsLibrary(
188+
const wchar_t* library_filename, // This is expected to be just the DLL
189+
// filename e.g. "analytics_win.dll"
190+
const unsigned char* expected_hash, size_t expected_hash_size) {
191+
if (library_filename == nullptr || library_filename[0] == L'\0') {
192+
LogError(LOG_TAG "Invalid arguments.");
193+
return nullptr;
194+
}
195+
if (expected_hash == nullptr || expected_hash_size == 0) {
196+
// Don't check the hash, just load the library.
197+
return LoadLibraryExW(library_filename, NULL,
198+
LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
199+
}
204200

205-
if (executable_path_str.empty()) {
206-
// GetExecutablePath() is expected to log specific errors.
207-
// This log indicates the failure to proceed within this function.
208-
LogError(LOG_TAG "Can't determine executable path.");
209-
return nullptr;
210-
}
201+
std::wstring executable_path_str = GetExecutablePath();
211202

212-
size_t last_slash_pos = executable_path_str.find_last_of(L"\\");
213-
if (last_slash_pos == std::wstring::npos) {
214-
// Log message updated to avoid using %ls for executable_path_str
215-
LogError(LOG_TAG "Could not determine executable directory.");
216-
return nullptr;
217-
}
203+
if (executable_path_str.empty()) {
204+
// GetExecutablePath() is expected to log specific errors.
205+
// This log indicates the failure to proceed within this function.
206+
LogError(LOG_TAG "Can't determine executable path.");
207+
return nullptr;
208+
}
218209

219-
std::wstring full_dll_path_str =
220-
executable_path_str.substr(0, last_slash_pos + 1);
221-
full_dll_path_str += library_filename; // library_filename is the filename
210+
size_t last_slash_pos = executable_path_str.find_last_of(L"\\");
211+
if (last_slash_pos == std::wstring::npos) {
212+
// Log message updated to avoid using %ls for executable_path_str
213+
LogError(LOG_TAG "Could not determine executable directory.");
214+
return nullptr;
215+
}
222216

223-
HANDLE hFile =
224-
CreateFileW(full_dll_path_str.c_str(), GENERIC_READ, FILE_SHARE_READ,
225-
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
226-
if (hFile == INVALID_HANDLE_VALUE) {
227-
DWORD dwError = GetLastError();
228-
// If the DLL is simply not found, silently proceed to stub mode without
229-
// logging an error. For other errors (e.g., access denied on an existing
230-
// file), log them as it's an unexpected issue.
231-
if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) {
232-
LogError(LOG_TAG "Failed to open Analytics DLL. Error: %u", dwError);
233-
}
234-
return nullptr; // In all CreateFileW failure cases, return nullptr to
235-
// fall back to stub mode.
217+
std::wstring full_dll_path_str =
218+
executable_path_str.substr(0, last_slash_pos + 1);
219+
full_dll_path_str += library_filename; // library_filename is the filename
220+
221+
HANDLE hFile =
222+
CreateFileW(full_dll_path_str.c_str(), GENERIC_READ, FILE_SHARE_READ,
223+
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
224+
if (hFile == INVALID_HANDLE_VALUE) {
225+
DWORD dwError = GetLastError();
226+
// If the DLL is simply not found, silently proceed to stub mode without
227+
// logging an error. For other errors (e.g., access denied on an existing
228+
// file), log them as it's an unexpected issue.
229+
if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) {
230+
LogError(LOG_TAG "Failed to open Analytics DLL. Error: %u", dwError);
236231
}
232+
return nullptr; // In all CreateFileW failure cases, return nullptr to
233+
// fall back to stub mode.
234+
}
237235

238-
OVERLAPPED overlapped = {0};
239-
// Attempt to lock the entire file exclusively (LOCKFILE_EXCLUSIVE_LOCK).
240-
// This helps ensure no other process modifies the file while we are
241-
// verifying and loading it.
242-
BOOL bFileLocked = LockFileEx(hFile, LOCKFILE_EXCLUSIVE_LOCK, 0, 0xFFFFFFFF,
243-
0xFFFFFFFF, &overlapped);
244-
if (!bFileLocked) {
245-
DWORD dwError = GetLastError();
246-
LogError(LOG_TAG "Failed to lock Analytics DLL. Error: %u", dwError);
247-
CloseHandle(hFile);
248-
return nullptr;
249-
}
236+
OVERLAPPED overlapped = {0};
237+
// Attempt to lock the entire file exclusively (LOCKFILE_EXCLUSIVE_LOCK).
238+
// This helps ensure no other process modifies the file while we are
239+
// verifying and loading it.
240+
BOOL bFileLocked = LockFileEx(hFile, LOCKFILE_EXCLUSIVE_LOCK, 0, 0xFFFFFFFF,
241+
0xFFFFFFFF, &overlapped);
242+
if (!bFileLocked) {
243+
DWORD dwError = GetLastError();
244+
LogError(LOG_TAG "Failed to lock Analytics DLL. Error: %u", dwError);
245+
CloseHandle(hFile);
246+
return nullptr;
247+
}
250248

251-
HMODULE hModule = nullptr;
249+
HMODULE hModule = nullptr;
252250

253-
std::vector<BYTE> calculated_hash = CalculateFileSha256(hFile);
251+
std::vector<BYTE> calculated_hash = CalculateFileSha256(hFile);
254252

255-
if (calculated_hash.empty()) {
256-
LogError(LOG_TAG "Hash failed for Analytics DLL.");
253+
if (calculated_hash.empty()) {
254+
LogError(LOG_TAG "Hash failed for Analytics DLL.");
255+
} else {
256+
if (calculated_hash.size() != expected_hash_size) {
257+
LogError(LOG_TAG
258+
"Hash size mismatch for Analytics DLL. Expected: %zu, "
259+
"Calculated: %zu.",
260+
expected_hash_size, calculated_hash.size());
261+
} else if (memcmp(calculated_hash.data(), expected_hash,
262+
expected_hash_size) != 0) {
263+
LogError(LOG_TAG "Hash mismatch for Analytics DLL.");
257264
} else {
258-
if (calculated_hash.size() != expected_hash_size) {
259-
LogError(LOG_TAG
260-
"Hash size mismatch for Analytics DLL. Expected: %zu, "
261-
"Calculated: %zu.",
262-
expected_hash_size, calculated_hash.size());
263-
} else if (memcmp(calculated_hash.data(), expected_hash,
264-
expected_hash_size) != 0) {
265-
LogError(LOG_TAG "Hash mismatch for Analytics DLL.");
266-
} else {
267-
// Load the library. LOAD_LIBRARY_SEARCH_APPLICATION_DIR is a security
268-
// measure to help ensure that the DLL is loaded from the application's
269-
// installation directory, mitigating risks of DLL preloading attacks
270-
// from other locations. Crucially, LoadLibraryExW with this flag needs
271-
// the DLL *filename only* (library_filename), not the full path we
272-
// constructed for CreateFileW.
273-
hModule = LoadLibraryExW(library_filename, NULL,
274-
LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
275-
if (hModule == NULL) {
276-
DWORD dwError = GetLastError();
277-
LogError(LOG_TAG "Library load failed for Analytics DLL. Error: %u",
278-
dwError);
279-
}
265+
// Load the library. LOAD_LIBRARY_SEARCH_APPLICATION_DIR is a security
266+
// measure to help ensure that the DLL is loaded from the application's
267+
// installation directory, mitigating risks of DLL preloading attacks
268+
// from other locations. Crucially, LoadLibraryExW with this flag needs
269+
// the DLL *filename only* (library_filename), not the full path we
270+
// constructed for CreateFileW.
271+
hModule = LoadLibraryExW(library_filename, NULL,
272+
LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
273+
if (hModule == NULL) {
274+
DWORD dwError = GetLastError();
275+
LogError(LOG_TAG "Library load failed for Analytics DLL. Error: %u",
276+
dwError);
280277
}
281278
}
279+
}
282280

283-
if (bFileLocked) {
284-
if (!UnlockFileEx(hFile, 0, 0xFFFFFFFF, 0xFFFFFFFF, &overlapped)) {
285-
DWORD dwError = GetLastError();
286-
LogError(LOG_TAG "Failed to unlock Analytics DLL. Error: %u", dwError);
287-
}
281+
if (bFileLocked) {
282+
if (!UnlockFileEx(hFile, 0, 0xFFFFFFFF, 0xFFFFFFFF, &overlapped)) {
283+
DWORD dwError = GetLastError();
284+
LogError(LOG_TAG "Failed to unlock Analytics DLL. Error: %u", dwError);
288285
}
286+
}
289287

290-
if (hFile != INVALID_HANDLE_VALUE) {
291-
if (!CloseHandle(hFile)) {
292-
DWORD dwError = GetLastError();
293-
LogError(LOG_TAG "Failed to close Analytics DLL. Error: %u", dwError);
294-
}
288+
if (hFile != INVALID_HANDLE_VALUE) {
289+
if (!CloseHandle(hFile)) {
290+
DWORD dwError = GetLastError();
291+
LogError(LOG_TAG "Failed to close Analytics DLL. Error: %u", dwError);
295292
}
296-
return hModule;
297293
}
294+
return hModule;
295+
}
298296

299297
} // namespace internal
300298
} // namespace analytics

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