ghidra-master/Ghidra/Features/Recognizers/src/main/java/ghidra/app/util/recognizer/CpioRecognizer.java
/* ###
 * IP: GHIDRA
 * REVIEWED: YES
 *
 * 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.
 */
package ghidra.app.util.recognizer;

public class CpioRecognizer implements Recognizer {
	@Override
	public String recognize(byte[] bytes) {
		if (bytes.length >= numberOfBytesRequired()) {
			if (bytes[0] == (byte) 0x30 &&
				bytes[1] == (byte) 0x37 &&
				bytes[2] == (byte) 0x30 &&
				bytes[3] == (byte) 0x37 &&
				bytes[4] == (byte) 0x30 &&
				(bytes[5] == (byte) 0x37 ||
				 bytes[5] == (byte) 0x31 ||
				 bytes[5] == (byte) 0x32)) {
				return "File appears to be a cpio archive file";
			}
			if (bytes[0] == (byte) 0x30 &&
				bytes[1] == (byte) 0x31 &&
				bytes[2] == (byte) 0x34 &&
				bytes[3] == (byte) 0x33 &&
				bytes[4] == (byte) 0x35 &&
				bytes[5] == (byte) 0x36 &&
				bytes[6] == (byte) 0x31) {
				return "File appears to be a byte-swapped cpio archive file";
			}
		}
		return null;
	}

	@Override
	public int getPriority() {
		return 100;
	}

	@Override
	public int numberOfBytesRequired() {
		return 7;
	}
}
