mirror of https://github.com/google/oss-fuzz.git
66 lines
2.6 KiB
Java
66 lines
2.6 KiB
Java
// Copyright 2022 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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////////////////////////////////////////////////////////////////////////////////
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import com.code_intelligence.jazzer.api.FuzzedDataProvider;
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import org.bouncycastle.util.encoders.Base64;
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import org.bouncycastle.util.encoders.Hex;
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import java.lang.StringBuffer;
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import java.util.Arrays;
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public class EncodingFuzzer {
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public static void fuzzerTestOneInput(FuzzedDataProvider data) {
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byte[] originalInput = data.consumeRemainingAsBytes();
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byte[] encodedB64 = Base64.encode(originalInput);
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byte[] decodedB64 = Base64.decode(encodedB64);
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if(!Arrays.equals(originalInput, decodedB64)){
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throw new IllegalStateException("Base64 encoding / decoding failure\n"
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+ "Original input: " + encodeHexString(originalInput) + "\n"
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+ "Encoded data: " + encodeHexString(encodedB64) + "\n"
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+ "Decoded data: " + encodeHexString(decodedB64) + "\n");
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}
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byte[] encodedHex = Hex.encode(originalInput);
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byte[] decodedHex = Hex.decode(encodedHex);
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if(!Arrays.equals(originalInput, decodedHex)){
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throw new IllegalStateException("Hex encoding / decoding failure\n"
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+ "Original input: " + encodeHexString(originalInput) + "\n"
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+ "Encoded data: " + encodeHexString(encodedHex) + "\n"
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+ "Decoded data: " + encodeHexString(decodedHex) + "\n");
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}
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}
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// These two methods were taken from: https://www.baeldung.com/java-byte-arrays-hex-strings
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private static String encodeHexString(byte[] byteArray) {
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StringBuffer hexStringBuffer = new StringBuffer();
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for (int i = 0; i < byteArray.length; i++) {
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hexStringBuffer.append(byteToHex(byteArray[i]));
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}
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return hexStringBuffer.toString();
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}
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private static String byteToHex(byte num) {
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char[] hexDigits = new char[2];
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hexDigits[0] = Character.forDigit((num >> 4) & 0xF, 16);
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hexDigits[1] = Character.forDigit((num & 0xF), 16);
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return new String(hexDigits);
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}
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}
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