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77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
# Examples of Pyhidra-specific functionality
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# @category: Examples.Python
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# @runtime Pyhidra
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# we can import java libraries just as if they were python libraries
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from java.util import LinkedList
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# and then use them like they are natural classes
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java_list = LinkedList([1,2,3])
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print(f"linked list object class: {java_list.__class__}")
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# importing and using Ghidra modules is the same
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from ghidra.program.flatapi import FlatProgramAPI
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print(f"max references to a flat program api: {FlatProgramAPI.MAX_REFERENCES_TO}")
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# we can also do normal python-ish things on our Java objects, like:
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# indexing
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print(f"first element of the list: {java_list[0]}")
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# slicing
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print(f"first two elements of the list: {java_list[0:2]}")
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# list comprehension
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java_list_double = [i * 2 for i in java_list]
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print(f"list comprehension result: {java_list_double}")
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# automatic calls to getters
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print(f"current program name: {currentProgram.name}") # calls currentProgram.getName()
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# here's an example of how this stuff might come in handy with Ghidra:
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print('current program memory blocks:\n')
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for block in currentProgram.memory.blocks:
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print(block.name)
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# many Ghidra functions need a Java-native array to pass or receive values
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# JPype provides objects of JByte, JChar, etc. to meet this need
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# this example demonstrates how you would create an array of bytes to get
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# the first 10 bytes of memory from the .text section
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# we need this import to get at the helper classes
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import jpype
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# get the block we need
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block = currentProgram.memory.getBlock('.text')
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if block:
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# the verbose way of getting the array
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byte_array_maker = jpype.JArray(jpype.JByte)
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byte_array = byte_array_maker(10)
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# we also could have taken a shortcut with just:
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# byte_array = jpype.JByte[10]
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# let's have a look at our new object
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print(f"array class: {byte_array.__class__}")
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# will be <java class 'byte[]'>
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print(f"array length: {len(byte_array)}")
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# we can now use this array wherever a Java method requires a byte[] type
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# the signature of getBytes is getBytes(Address addr, byte[] b)
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block.getBytes(block.start, byte_array)
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# after the call, we can get the bytes out as desired
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# we just put them in a list comprehension here
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print(f"first 10 bytes of .text: {['%#x' % ((b+256)%256) for b in byte_array]}")
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# if the data isn't being changed, a bytes-like objct may be used
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data = b"Hello"
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clearListing(block.start, block.start.add(len(data) - 1))
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block.putBytes(block.start, data)
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else:
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print('no block named .text in this program.')
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# see the user manual of JPype for more details on interoperability:
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# https://jpype.readthedocs.io/en/latest/userguide.html
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