chenx221/Textractor_test
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fixed hookstrlen seeing ascii char+unicode space as null terminator

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This commit is contained in:
Akash Mozumdar 2019-06-15 19:38:44 -04:00
parent b4c5b31482
commit ef90382bbb
2 changed files with 4 additions and 4 deletions
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2
test/main.cpp
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@ -43,7 +43,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int)
return FALSE; return FALSE;
}, 0), SW_SHOW); }, 0), SW_SHOW);
std::thread([] { while (true) Sleep(vars.at(0)), lstrlenW(L"こんにちは"); }).detach(); std::thread([] { while (true) Sleep(vars.at(0)), lstrlenW(L"こんにちは\n　(Hello)"); }).detach();
STARTUPINFOW info = { sizeof(info) }; STARTUPINFOW info = { sizeof(info) };
wchar_t commandLine[] = { L"Textractor -p\"Test.exe\"" }; wchar_t commandLine[] = { L"Textractor -p\"Test.exe\"" };

6
texthook/texthook.cc
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@ -327,11 +327,11 @@ int TextHook::GetLength(uintptr_t base, uintptr_t in)
int TextHook::HookStrlen(BYTE* data) int TextHook::HookStrlen(BYTE* data)
{ {
if (!hp.null_length) return hp.type & USING_UNICODE ? wcslen((wchar_t*)data) * 2 : strlen((char*)data);
BYTE* orig = data; BYTE* orig = data;
int nulls = hp.null_length ? hp.null_length : hp.type & USING_UNICODE ? 2 : 1; for (int nullsRemaining = hp.null_length; nullsRemaining > 0; ++data)
for (int nullsRemaining = nulls; nullsRemaining > 0; ++data)
if (*data == 0) nullsRemaining -= 1; if (*data == 0) nullsRemaining -= 1;
else nullsRemaining = nulls; else nullsRemaining = hp.null_length;
return data - orig; return data - orig;
} }