wintrust: Don't fail CryptCATOpen on empty file or invalid data.

dlls/wintrust/crypt.c

@@ -908,6 +908,7 @@ HANDLE WINAPI CryptCATOpen(WCHAR *filename, DWORD flags, HCRYPTPROV hProv,
     BYTE *buffer = NULL;
     DWORD size, open_mode = OPEN_ALWAYS;
     struct cryptcat *cc;
+    BOOL valid;
 
     TRACE("filename %s, flags %#x, provider %#lx, version %#x, type %#x\n",
           debugstr_w(filename), flags, hProv, dwPublicVersion, dwEncodingType);
@@ -941,13 +942,15 @@ HANDLE WINAPI CryptCATOpen(WCHAR *filename, DWORD flags, HCRYPTPROV hProv,
         HeapFree(GetProcessHeap(), 0, buffer);
         return INVALID_HANDLE_VALUE;
     }
-    if (!ReadFile(file, buffer, size, &size, NULL) || !CryptMsgUpdate(hmsg, buffer, size, TRUE))
+    if (!size) valid = FALSE;
+    else if (!ReadFile(file, buffer, size, &size, NULL))
     {
         CloseHandle(file);
         HeapFree(GetProcessHeap(), 0, buffer);
         CryptMsgClose(hmsg);
         return INVALID_HANDLE_VALUE;
     }
+    else valid = CryptMsgUpdate(hmsg, buffer, size, TRUE);
     HeapFree(GetProcessHeap(), 0, buffer);
     CloseHandle(file);
 
@@ -961,7 +964,13 @@ HANDLE WINAPI CryptCATOpen(WCHAR *filename, DWORD flags, HCRYPTPROV hProv,
 
     cc->msg = hmsg;
     cc->encoding = dwEncodingType;
-    if (CryptMsgGetParam(hmsg, CMSG_ATTR_CERT_COUNT_PARAM, 0, &cc->attr_count, &size))
+    if (!valid)
+    {
+        cc->magic = CRYPTCAT_MAGIC;
+        SetLastError(ERROR_SUCCESS);
+        return cc;
+    }
+    else if (CryptMsgGetParam(hmsg, CMSG_ATTR_CERT_COUNT_PARAM, 0, &cc->attr_count, &size))
     {
         DWORD i, sum = 0;
         BYTE *p;
@@ -1012,6 +1021,7 @@ HANDLE WINAPI CryptCATOpen(WCHAR *filename, DWORD flags, HCRYPTPROV hProv,
             return INVALID_HANDLE_VALUE;
         }
         cc->magic = CRYPTCAT_MAGIC;
+        SetLastError(ERROR_SUCCESS);
         return cc;
     }
     HeapFree(GetProcessHeap(), 0, cc);

dlls/wintrust/tests/crypt.c

@@ -429,10 +429,10 @@ static void test_CryptCATOpen(void)
         }
         else
         {
-            todo_wine ok(cat != INVALID_HANDLE_VALUE, "flags %#x: expected success\n", flags);
-            todo_wine ok(!GetLastError(), "flags %#x: got error %u\n", flags, GetLastError());
+            ok(cat != INVALID_HANDLE_VALUE, "flags %#x: expected success\n", flags);
+            ok(!GetLastError(), "flags %#x: got error %u\n", flags, GetLastError());
             ret = pCryptCATClose(cat);
-            todo_wine ok(ret, "flags %#x: failed to close file\n", flags);
+            ok(ret, "flags %#x: failed to close file\n", flags);
             ret = DeleteFileW(filename);
             ok(ret, "flags %#x: failed to delete file, error %u\n", flags, GetLastError());
         }
@@ -443,10 +443,10 @@ static void test_CryptCATOpen(void)
 
         SetLastError(0xdeadbeef);
         cat = pCryptCATOpen(filename, flags, 0, 0, 0);
-        todo_wine ok(cat != INVALID_HANDLE_VALUE, "flags %#x: expected success\n", flags);
-        todo_wine ok(!GetLastError(), "flags %#x: got error %u\n", flags, GetLastError());
+        ok(cat != INVALID_HANDLE_VALUE, "flags %#x: expected success\n", flags);
+        ok(!GetLastError(), "flags %#x: got error %u\n", flags, GetLastError());
         ret = pCryptCATClose(cat);
-        todo_wine ok(ret, "flags %#x: failed to close file\n", flags);
+        ok(ret, "flags %#x: failed to close file\n", flags);
 
         file = _wfopen(filename, L"r");
         ret = fread(buffer, 1, sizeof(buffer), file);