tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

LoadLibraryUsageChecker.cpp (1352B)

      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 "LoadLibraryUsageChecker.h"
      6 #include "CustomMatchers.h"
      7 
      8 // On MacOS the filesystem is UTF-8, on linux the canonical filename is 8-bit
      9 // string. On Windows data loss conversion will occur. This checker restricts
     10 // the use of ASCII file functions for loading libraries.
     11 
     12 void LoadLibraryUsageChecker::registerMatchers(MatchFinder *AstMatcher) {
     13  AstMatcher->addMatcher(
     14      callExpr(
     15          allOf(isFirstParty(),
     16                callee(functionDecl(anyOf(
     17                    allOf(isInSystemHeader(), anyOf(hasName("LoadLibraryA"),
     18                                                    hasName("LoadLibraryExA"))),
     19                    hasName("PR_LoadLibrary")))),
     20                unless(hasArgument(0, stringLiteral()))))
     21          .bind("funcCall"),
     22      this);
     23 }
     24 
     25 void LoadLibraryUsageChecker::check(const MatchFinder::MatchResult &Result) {
     26  const CallExpr *FuncCall = Result.Nodes.getNodeAs<CallExpr>("funcCall");
     27 
     28  if (FuncCall) {
     29    diag(FuncCall->getBeginLoc(),
     30         "Usage of ASCII file functions (such as %0) is forbidden.",
     31         DiagnosticIDs::Error)
     32        << FuncCall->getDirectCallee()->getName();
     33  }
     34 }