103 lines
2.9 KiB
Java
103 lines
2.9 KiB
Java
/* ###
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* IP: GHIDRA
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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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//Splits an Extensible Firmware Interface (EFI) binary into the separate
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//MZ/PE files for each processor.
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//The output files are placed in the selected directory with the processor name appended.
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//@category Binary
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import java.io.*;
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import ghidra.app.script.GhidraScript;
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import ghidra.app.util.bin.*;
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import ghidra.app.util.bin.format.macho.CpuTypes;
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import ghidra.program.model.lang.Processor;
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public class SplitExtensibleFirmwareInterfaceScript extends GhidraScript {
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public final static int MAGIC = 0x0ef1fab9;
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@Override
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public void run() throws Exception {
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StringBuffer messages = new StringBuffer();
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File efiFile = askFile("Select EFI File", "EFI");
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File directory = askDirectory("Select Output Directory for Parsed EFI", "OK");
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ByteProvider provider = new RandomAccessByteProvider(efiFile);
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try {
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BinaryReader reader = new BinaryReader(provider, true);
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int magic = reader.readNextInt();
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if (magic != MAGIC) {
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popup("THIS DOES NOT APPEAR TO BE A VALID APPLE EFI FILE");
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return;
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}
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int architecturesCount = reader.readNextInt();
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monitor.setMaximum(architecturesCount);
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for (int i = 0; i < architecturesCount; ++i) {
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monitor.setProgress(i);
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if (monitor.isCancelled()) {
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break;
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}
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int cpuType = reader.readNextInt();
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int cpuSubType = reader.readNextInt();
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int offset = reader.readNextInt();
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int size = reader.readNextInt();
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int alignment = reader.readNextInt();
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Processor processor = CpuTypes.getProcessor(cpuType, cpuSubType);
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int processorBitSize = CpuTypes.getProcessorBitSize(cpuType);
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String processorString = processor + "-" + processorBitSize + "-bit";
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String targetName =
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efiFile.getName() + "_" + processorString + "_" + "at" + "_" + "0x" +
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Integer.toHexString(offset);
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String message =
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"EFI Target found: " + processorString + " at 0x" +
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Integer.toHexString(offset) + " with alignment " + alignment;
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monitor.setMessage(message);
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messages.append(message + "\n");
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println(message);
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byte[] targetBytes = reader.readByteArray(offset, size);
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OutputStream targetOut = new FileOutputStream(new File(directory, targetName));
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try {
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targetOut.write(targetBytes);
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}
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finally {
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targetOut.close();
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}
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}
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popup(messages.toString());
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}
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finally {
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provider.close();
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}
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}
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}
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