/* Copyright 2022 Google LLC

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 <stdint.h>

#include <assert.h>

#include <stdlib.h>

#include <unistd.h>

#include "lcms2.h"

cmsTagSignature tagsToRead[] = {

  cmsSigGreenColorantTag,

  cmsSigGreenMatrixColumnTag,

  cmsSigGreenTRCTag,

  cmsSigMeasurementTag,

  cmsSigNamedColorTag,

  cmsSigPreview1Tag,

  cmsSigPs2CRD2Tag,

  cmsSigPs2CRD3Tag,

  cmsSigRedTRCTag,

};

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  if (size == 0)

    return 0;

  char filename[256];

  sprintf(filename, "/tmp/libfuzzer.%d.icc", getpid());

  FILE *fp = fopen(filename, "wb");

  if (!fp) {

    return 0;

  }

  fwrite(data, size, 1, fp);

  fclose(fp);

  cmsHPROFILE hProfile = cmsOpenProfileFromFile(filename, "r");

  // If we have a profile, perform a set of operations

  if (hProfile) {

    char tagBuffer[4];

    // Perform multiple tag reads. Read tags twice as behavior matters

    // if tags have been read before.

    for (int j = 0; j < 2; j++) {

      for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {

        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

        cmsReadRawTag(hProfile, tagsToRead[i], NULL, 0);

        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

        cmsReadTag(hProfile, tagsToRead[i]);

      }

    }

    // Read profile info

    cmsInfoType info = data[0] % 4;

    char outBuffer[100];

    cmsGetProfileInfoASCII(hProfile, info, "DEN", "DEN", outBuffer, 100);

    cmsGetTagCount(hProfile);

    if (size > 2) {

      cmsGetTagSignature(hProfile, (cmsUInt32Number)data[1]);

    }

    if (size > 40) {

      cmsTagSignature tag = *((uint32_t *)(data+5));

      cmsTagLinkedTo(hProfile, tag);

    }

    // Save to random file

    cmsSaveProfileToFile(hProfile, "random.icc");

    cmsCloseProfile(hProfile);

  }

  // Let's write the profile now.

  hProfile = cmsOpenProfileFromFile(filename, "w");

  if (hProfile) {

    char tagBuffer[4] = {'a', 'a', 'a', 'a'};

    // Perform multiple tag reads

    for (int j = 0; j < 2; j++) {

      for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {

        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

        cmsReadRawTag(hProfile, tagsToRead[i], NULL, 0);

        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

        cmsReadTag(hProfile, tagsToRead[i]);

      }

    }

    for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {

      cmsWriteRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

    }

    for (int j = 0; j < 2; j++) {

      for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {

        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

        cmsReadRawTag(hProfile, tagsToRead[i], NULL, 0);

        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

        cmsReadTag(hProfile, tagsToRead[i]);

      }

    }

    for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {

      cmsWriteRawTag(hProfile, tagsToRead[i], tagBuffer, 4);

    }

    // Save to random file

    cmsSaveProfileToFile(hProfile, "random.icc");

    cmsCloseProfile(hProfile);

  }

  unlink(filename);

  return 0;

}