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56 lines
1.6 KiB
56 lines
1.6 KiB
#!/usr/bin/env python3
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from argparse import ArgumentParser, ArgumentTypeError
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SALT_LENGTH = 64
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DATA_LENGTH = 448
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HEADER_LENGTH = SALT_LENGTH + DATA_LENGTH
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SIGNATURE = "$veracrypt$"
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BOOTABLE_OFFSET = 31744 # 62 * 512
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HIDDEN_OFFSET = 65536 # 64K
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def validate_offset(offset):
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# see also https://hashcat.net/wiki/doku.php?id=frequently_asked_questions#how_do_i_extract_the_hashes_from_veracrypt_volumes
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if offset == "bootable":
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offset = BOOTABLE_OFFSET
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elif offset == "hidden":
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offset = HIDDEN_OFFSET
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elif offset == "bootable+hidden":
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offset = BOOTABLE_OFFSET + HIDDEN_OFFSET
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try:
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offset = int(offset)
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assert offset >= 0
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except (AssertionError, ValueError):
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raise ArgumentTypeError("offset is nether non-negative number nor bootable, hidden or bootable+hidden value")
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return offset
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if __name__ == "__main__":
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parser = ArgumentParser(description="veracrypt2hashcat extraction tool")
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parser.add_argument(
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"--offset",
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default=0,
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type=validate_offset,
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required=False,
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help="select between bootable, hidden, bootable+hidden or custom one (default: 0)",
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)
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parser.add_argument("path", type=str, help="path to VeraCrypt container")
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args = parser.parse_args()
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with open(args.path, "rb") as file:
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file.seek(args.offset)
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header = file.read(HEADER_LENGTH)
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assert len(header) == HEADER_LENGTH, "less data than needed"
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salt, data = header[:SALT_LENGTH], header[SALT_LENGTH:]
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hash = SIGNATURE + salt.hex() + "$" + data.hex()
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print(hash)
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