mirror of https://github.com/google/oss-fuzz.git
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
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/* Copyright 2022 Google LLC
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 <stdint.h>
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#include "lcms2.h"
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/* Fuzzer that creates a transform with the following vars initialized by way
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* of fuzzer data:
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* - srcFormat
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* - dstFormat
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* - profile
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* Then applies the transform once on a input derived from the fuzzer.
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* This input data and output data to cmsDoTransform is allocated such
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* that it is large enough for any input/output types.
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*/
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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if (size < 2048) {
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return 0;
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}
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uint8_t *profile_data = NULL;
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uint8_t *input_data = NULL;
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uint8_t *output_data = NULL;
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// Create a random src and dst format
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uint32_t srcFormat = *(uint32_t*)data;
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data += 4;
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size -= 4;
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uint32_t dstFormat = *(uint32_t*)data;
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data += 4;
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size -= 4;
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profile_data = (uint8_t*)malloc(512);
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memcpy(profile_data, data, 512);
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data += 512;
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size -= 512;
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cmsHPROFILE srcProfile = cmsOpenProfileFromMem(profile_data, 512);
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if (!srcProfile) {
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goto cleanup;
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}
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cmsHPROFILE dstProfile = cmsCreate_sRGBProfile();
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if (!dstProfile) {
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cmsCloseProfile(srcProfile);
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goto cleanup;
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}
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cmsColorSpaceSignature srcCS = cmsGetColorSpace(srcProfile);
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cmsUInt32Number nSrcComponents = cmsChannelsOf(srcCS);
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// allocate input buffer with fuzz data. Choose a large enough size so
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// overflows wont occur due to erroneous typing.
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if (size < nSrcComponents * 80) {
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cmsCloseProfile(srcProfile);
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cmsCloseProfile(dstProfile);
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goto cleanup;
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}
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input_data = (uint8_t *)malloc(nSrcComponents * 80);
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memcpy(input_data, data, nSrcComponents*80);
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// Make empty output data
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output_data = (uint8_t *)malloc(nSrcComponents * 80);
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cmsUInt32Number intent = 0;
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cmsUInt32Number flags = 0;
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cmsHTRANSFORM hTransform = cmsCreateTransform(
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srcProfile, srcFormat, dstProfile, dstFormat, intent, flags);
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cmsCloseProfile(srcProfile);
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cmsCloseProfile(dstProfile);
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if (!hTransform) {
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goto cleanup;
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}
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// Do the transform
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cmsDoTransform(hTransform, input_data, output_data, 1);
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cmsDeleteTransform(hTransform);
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cleanup:
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if (output_data != NULL) {
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free(output_data);
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}
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if (input_data != NULL) {
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free(input_data);
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}
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if (profile_data != NULL) {
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free(profile_data);
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}
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return 0;
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}
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