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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#include <iostream>
#include "FuzzingInterface.h"
#include "nsComponentManagerUtils.h"
#include "nsCOMPtr.h"
#include "nsIZipReader.h"
#include "nsNetUtil.h"
#include "nsNetCID.h"
#include "nsPrintfCString.h"
#include "nsString.h"
#include "mozilla/Span.h"
#include "mozilla/Unused.h"
#include "nsIInputStream.h"
#include "nsIStringEnumerator.h"
enum FuzzMethodType {
eTest = 0,
eGetEntry,
eHasEntry,
eFindEntries,
eInputStream,
eOpenInner,
eLastMethod,
};
static NS_DEFINE_CID(kZipReaderCID, NS_ZIPREADER_CID);
template <typename T>
T jar_get_num(char** buf, size_t* size) {
if (sizeof(T) > *size) {
return 0;
}
T* iptr = reinterpret_cast<T*>(*buf);
*buf += sizeof(T);
*size -= sizeof(T);
return *iptr;
}
nsAutoCString jar_get_string(char** buf, size_t* size) {
uint8_t len = jar_get_num<uint8_t>(buf, size);
if (len > *size) {
len = static_cast<uint8_t>(*size);
}
nsAutoCString str(*buf, len);
*buf += len;
*size -= len;
return str;
}
nsresult FuzzEntries(char** buf, size_t* size, nsIZipReader* aReader,
const nsACString& aName) {
uint8_t iters = jar_get_num<uint8_t>(buf, size);
nsresult rv;
for (uint8_t i = 0; i < iters; ++i) {
nsAutoCString out;
uint64_t written;
nsCOMPtr<nsIZipEntry> entry;
nsCOMPtr<nsIInputStream> stream;
switch (jar_get_num<uint8_t>(buf, size) % eLastMethod) {
case eTest: {
rv = aReader->Test(aName);
NS_ENSURE_SUCCESS(rv, rv);
break;
}
case eGetEntry: {
rv = aReader->GetEntry(aName, getter_AddRefs(entry));
NS_ENSURE_SUCCESS(rv, rv);
break;
}
case eHasEntry: {
bool has = false;
rv = aReader->HasEntry(aName, &has);
NS_ENSURE_SUCCESS(rv, rv);
break;
}
case eInputStream:
rv = aReader->GetInputStream(aName, getter_AddRefs(stream));
NS_ENSURE_SUCCESS(rv, rv);
if (NS_FAILED(rv)) {
break;
}
rv = NS_ReadInputStreamToString(stream, out, -1, &written);
NS_ENSURE_SUCCESS(rv, rv);
break;
default:
break;
}
}
return NS_OK;
}
nsresult FuzzReader(char** buf, size_t* size, nsIZipReader* aReader) {
nsresult rv;
nsAutoCString name;
nsCOMPtr<nsIZipEntry> entry;
bool has = false;
nsAutoCString pattern;
nsCOMPtr<nsIUTF8StringEnumerator> enumerator;
nsCOMPtr<nsIInputStream> stream;
bool hasMore;
nsAutoCString out;
uint64_t written;
nsCOMPtr<nsIZipReader> newReader = do_CreateInstance(kZipReaderCID, &rv);
switch (jar_get_num<uint8_t>(buf, size) % eLastMethod) {
case eTest:
rv = aReader->Test(""_ns);
NS_ENSURE_SUCCESS(rv, rv);
break;
case eGetEntry:
name = jar_get_string(buf, size);
rv = aReader->GetEntry(name, getter_AddRefs(entry));
NS_ENSURE_SUCCESS(rv, rv);
break;
case eHasEntry:
name = jar_get_string(buf, size);
rv = aReader->HasEntry(name, &has);
NS_ENSURE_SUCCESS(rv, rv);
break;
case eFindEntries:
pattern = jar_get_string(buf, size);
rv = aReader->FindEntries(pattern, getter_AddRefs(enumerator));
NS_ENSURE_SUCCESS(rv, rv);
while (NS_SUCCEEDED(enumerator->HasMore(&hasMore)) && hasMore) {
if (NS_FAILED(enumerator->GetNext(name))) {
break;
}
rv = FuzzEntries(buf, size, aReader, name);
NS_ENSURE_SUCCESS(rv, rv);
}
break;
case eInputStream:
name = jar_get_string(buf, size);
rv = aReader->GetInputStream(name, getter_AddRefs(stream));
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_ReadInputStreamToString(stream, out, -1, &written);
NS_ENSURE_SUCCESS(rv, rv);
break;
case eOpenInner:
name = jar_get_string(buf, size);
rv = newReader->OpenInner(aReader, name);
NS_ENSURE_SUCCESS(rv, rv);
rv = FuzzReader(buf, size, newReader);
NS_ENSURE_SUCCESS(rv, rv);
break;
default:
break;
}
return rv;
}
static int FuzzingRunJARParser(const uint8_t* data, size_t size) {
char* buf = (char*)data;
nsresult rv;
nsCOMPtr<nsIURI> uri;
nsAutoCString jardata = jar_get_string(&buf, &size);
nsCOMPtr<nsIZipReader> reader = do_CreateInstance(kZipReaderCID, &rv);
rv = reader->OpenMemory((void*)jardata.get(), jardata.Length());
NS_ENSURE_SUCCESS(rv, 0);
#if 0
// For easily exporting the last test case that triggered a crash.
FILE * f = fopen("/tmp/input.jar", "wb");
fwrite((void*)jardata.get(), 1, jardata.Length(), f);
fclose(f);
#endif
uint8_t iters = jar_get_num<uint8_t>(&buf, &size);
for (uint8_t i = 0; i < iters; ++i) {
rv = FuzzReader(&buf, &size, reader);
NS_ENSURE_SUCCESS(rv, 0);
}
return 0;
}
MOZ_FUZZING_INTERFACE_RAW(nullptr, FuzzingRunJARParser, JARParser);
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