60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2016 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <assert.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#include "expat.h"
|
||
|
|
#include "siphash.h"
|
||
|
|
|
||
|
|
// Macros to convert preprocessor macros to string literals. See
|
||
|
|
// https://gcc.gnu.org/onlinedocs/gcc-3.4.3/cpp/Stringification.html
|
||
|
|
#define xstr(s) str(s)
|
||
|
|
#define str(s) #s
|
||
|
|
|
||
|
|
// The encoder type that we wish to fuzz should come from the compile-time
|
||
|
|
// definition `ENCODING_FOR_FUZZING`. This allows us to have a separate fuzzer
|
||
|
|
// binary for
|
||
|
|
#ifndef ENCODING_FOR_FUZZING
|
||
|
|
# error "ENCODING_FOR_FUZZING was not provided to this fuzz target."
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// 16-byte determinstic hash key.
|
||
|
|
static unsigned char hash_key[16] = "FUZZING IS FUN!";
|
||
|
|
|
||
|
|
static void XMLCALL
|
||
|
|
start(void *userData, const XML_Char *name, const XML_Char **atts) {
|
||
|
|
}
|
||
|
|
static void XMLCALL
|
||
|
|
end(void *userData, const XML_Char *name) {
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
|
||
|
|
XML_Parser p = XML_ParserCreate(xstr(ENCODING_FOR_FUZZING));
|
||
|
|
assert(p);
|
||
|
|
|
||
|
|
// Set the hash salt using siphash to generate a deterministic hash.
|
||
|
|
struct sipkey *key = sip_keyof(hash_key);
|
||
|
|
XML_SetHashSalt(p, (unsigned long)siphash24(data, size, key));
|
||
|
|
|
||
|
|
XML_SetElementHandler(p, start, end);
|
||
|
|
XML_Parse(p, (const XML_Char *)data, size, 0);
|
||
|
|
XML_Parse(p, (const XML_Char *)data, size, 1);
|
||
|
|
XML_ParserFree(p);
|
||
|
|
return 0;
|
||
|
|
}
|