161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/*
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include "tidybuffio.h"
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#include "tidy.h"
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// All boolean options. These will be set randomly
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// based on the fuzzer data.
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TidyOptionId bool_options[] = {
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TidyJoinClasses,
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TidyJoinStyles,
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TidyKeepFileTimes,
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TidyKeepTabs,
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TidyLiteralAttribs,
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TidyLogicalEmphasis,
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TidyLowerLiterals,
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TidyMakeBare,
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TidyFixUri,
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TidyForceOutput,
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TidyGDocClean,
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TidyHideComments,
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TidyMark,
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TidyXmlTags,
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TidyMakeClean,
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TidyAnchorAsName,
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TidyMergeEmphasis,
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TidyMakeBare,
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TidyMetaCharset,
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TidyMuteShow,
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TidyNCR,
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TidyNumEntities,
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TidyOmitOptionalTags,
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TidyPunctWrap,
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TidyQuiet,
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TidyQuoteAmpersand,
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TidyQuoteMarks,
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TidyQuoteNbsp,
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TidyReplaceColor,
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TidyShowFilename,
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TidyShowInfo,
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TidyShowMarkup,
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TidyShowMetaChange,
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TidyShowWarnings,
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TidySkipNested,
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TidyUpperCaseTags,
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TidyWarnPropAttrs,
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TidyWord2000,
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TidyWrapAsp,
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TidyWrapAttVals,
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TidyWrapJste,
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TidyWrapPhp,
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TidyWrapScriptlets,
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TidyWrapSection,
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TidyWriteBack,
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};
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void set_option(const uint8_t** data, size_t *size, TidyDoc *tdoc, TidyOptionId tboolID) {
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uint8_t decider;
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decider = **data;
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*data += 1;
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*size -= 1;
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if (decider % 2 == 0) tidyOptSetBool( *tdoc, tboolID, yes );
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else { tidyOptSetBool( *tdoc, tboolID, no ); }
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}
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int TidyXhtml(const uint8_t* data, size_t size, TidyBuffer* output, TidyBuffer* errbuf) {
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uint8_t decider;
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// We need enough data for picking all of the options. One byte per option.
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if (size < 5+(sizeof(bool_options)/sizeof(bool_options[0]))) {
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return 0;
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}
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TidyDoc tdoc = tidyCreate();
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// Decide output format
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decider = *data;
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data++; size--;
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if (decider % 3 == 0) tidyOptSetBool( tdoc, TidyXhtmlOut, yes );
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else { tidyOptSetBool( tdoc, TidyXhtmlOut, no ); }
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if (decider % 3 == 1) tidyOptSetBool( tdoc, TidyHtmlOut, yes );
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else { tidyOptSetBool( tdoc, TidyHtmlOut, no ); }
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if (decider % 3 == 2) tidyOptSetBool( tdoc, TidyXmlOut, yes );
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else { tidyOptSetBool( tdoc, TidyXmlOut, no ); }
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// Set options
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for (int i=0; i < sizeof(bool_options)/sizeof(TidyOptionId); i++) {
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set_option(&data, &size, &tdoc, bool_options[i]);
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}
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// Set an error buffer.
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tidySetErrorBuffer(tdoc, errbuf);
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// Parse the data
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decider = *data;
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data++; size--;
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switch (decider % 2) {
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case 0: {
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char filename[256];
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sprintf(filename, "/tmp/libfuzzer.%d", getpid());
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FILE *fp = fopen(filename, "wb");
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if (!fp) {
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return 0;
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}
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fwrite(data, size, 1, fp);
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fclose(fp);
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tidyParseFile(tdoc, filename);
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unlink(filename);
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}
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break;
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case 1: {
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char *inp = malloc(size+1);
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inp[size] = '\0';
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memcpy(inp, data, size);
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tidyParseString(tdoc, inp);
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free(inp);
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}
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}
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// Cleanup
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tidyRelease( tdoc );
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return 0;
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}
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int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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TidyBuffer fuzz_toutput;
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TidyBuffer fuzz_terror;
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tidyBufInit(&fuzz_toutput);
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tidyBufInit(&fuzz_terror);
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TidyXhtml(data, size, &fuzz_toutput, &fuzz_terror);
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tidyBufFree(&fuzz_toutput);
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tidyBufFree(&fuzz_terror);
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return 0;
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}
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