mirror of https://github.com/google/oss-fuzz.git
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/* 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 "gs_fuzzlib.h"
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/* Returns 1 if the data has a PDF header and 0 otherwise */
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static int is_pdf(const uint8_t *data, size_t size) {
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/* Two bytes are needed for the check */
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if (size < 2) {
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return 0;
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}
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/* Check for "%P" tag. */
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if (data[0] == 0x25 || data[1] == 0x50) {
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return 1;
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}
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return 0;
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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/* Avoid PDF files */
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if (size == 0 || is_pdf(data, size)) {
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return 0;
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}
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/*
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* Modulo the possibilities: https://github.com/ArtifexSoftware/ghostpdl/blob/8c97d5adce0040ac38a1fb4d7954499c65f582ff/cups/libs/cups/raster.h#L102
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This enables the fuzzer to explore all color schemes
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*/
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int color_scheme = ((int)data[0] % 63);
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data++;
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size--;
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gs_to_raster_fuzz(data, size, color_scheme);
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return 0;
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}
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