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9df5e2f171
The line with TAGS is longer than 120 columns and there is some comment that should be moved to the python docstring. Related: OS#6679 Change-Id: I1d02098320cfbe17a0eb1bfdcf3bc85034cc8e20
22 lines
725 B
Python
22 lines
725 B
Python
# JavaCard related utilities
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import zipfile
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import struct
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import sys
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import io
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def ijc_to_cap(in_file: io.IOBase, out_zip: zipfile.ZipFile, p : str = "foo"):
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"""Convert an ICJ (Interoperable Java Card) file [back] to a CAP file.
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example usage:
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with io.open(sys.argv[1],"rb") as f, zipfile.ZipFile(sys.argv[2], "wb") as z:
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ijc_to_cap(f, z)
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"""
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TAGS = ["Header", "Directory", "Applet", "Import", "ConstantPool", "Class", "Method", "StaticField", "RefLocation",
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"Export", "Descriptor", "Debug"]
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b = in_file.read()
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while len(b):
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tag, size = struct.unpack('!BH', b[0:3])
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out_zip.writestr(p+"/javacard/"+TAGS[tag-1]+".cap", b[0:3+size])
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b = b[3+size:]
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