generated from sethub/template
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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/*
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* schema.c: a libFuzzer target to test the XML Schema processor.
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*
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* See Copyright for the status of this software.
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*/
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#ifndef XML_DEPRECATED
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#define XML_DEPRECATED
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#endif
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#include <libxml/catalog.h>
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#include <libxml/xmlschemas.h>
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#include <libxml/xmlschemastypes.h>
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#include "fuzz.h"
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int
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LLVMFuzzerInitialize(int *argc ATTRIBUTE_UNUSED,
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char ***argv ATTRIBUTE_UNUSED) {
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xmlFuzzMemSetup();
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xmlInitParser();
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#ifdef LIBXML_CATALOG_ENABLED
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xmlInitializeCatalog();
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xmlCatalogSetDefaults(XML_CATA_ALLOW_NONE);
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#endif
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return 0;
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}
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int
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LLVMFuzzerTestOneInput(const char *data, size_t size) {
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xmlSchemaParserCtxtPtr pctxt;
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xmlSchemaPtr schema;
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size_t failurePos;
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if (size > 200000)
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return(0);
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xmlFuzzDataInit(data, size);
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failurePos = xmlFuzzReadInt(4) % (size + 100);
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xmlFuzzReadEntities();
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xmlFuzzInjectFailure(failurePos);
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pctxt = xmlSchemaNewParserCtxt(xmlFuzzMainUrl());
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xmlSchemaSetParserStructuredErrors(pctxt, xmlFuzzSErrorFunc, NULL);
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xmlSchemaSetResourceLoader(pctxt, xmlFuzzResourceLoader, NULL);
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schema = xmlSchemaParse(pctxt);
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xmlSchemaFreeParserCtxt(pctxt);
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if (schema != NULL) {
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xmlSchemaValidCtxtPtr vctxt;
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xmlParserCtxtPtr ctxt;
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xmlDocPtr doc;
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ctxt = xmlNewParserCtxt();
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xmlCtxtSetErrorHandler(ctxt, xmlFuzzSErrorFunc, NULL);
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xmlCtxtSetResourceLoader(ctxt, xmlFuzzResourceLoader, NULL);
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doc = xmlCtxtReadFile(ctxt, xmlFuzzSecondaryUrl(), NULL,
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XML_PARSE_NOENT);
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xmlFreeParserCtxt(ctxt);
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vctxt = xmlSchemaNewValidCtxt(schema);
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xmlSchemaSetValidStructuredErrors(vctxt, xmlFuzzSErrorFunc, NULL);
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xmlSchemaValidateDoc(vctxt, doc);
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xmlSchemaFreeValidCtxt(vctxt);
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xmlFreeDoc(doc);
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xmlSchemaFree(schema);
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}
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xmlFuzzInjectFailure(0);
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xmlFuzzDataCleanup();
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xmlResetLastError();
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xmlSchemaCleanupTypes();
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return(0);
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}
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size_t
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LLVMFuzzerCustomMutator(char *data, size_t size, size_t maxSize,
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unsigned seed) {
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static const xmlFuzzChunkDesc chunks[] = {
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{ 4, XML_FUZZ_PROB_ONE / 10 }, /* failurePos */
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{ 0, 0 }
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};
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return xmlFuzzMutateChunks(chunks, data, size, maxSize, seed,
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LLVMFuzzerMutate);
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}
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