26 lines
889 B
Python
26 lines
889 B
Python
# generates the 8-bit checksum from a JSON file, provided its path is given as an argument
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import sys
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import json
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# load json file from provided path
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with open(sys.argv[1], 'r') as f:
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json_data = json.load(f)
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if not json_data:
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print("Error: JSON file did not contain any data or path didn't match exactly, exiting...")
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exit(1)
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# convert json dict->string and sum
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str_json_data = json.dumps(json_data)
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sum_json_data = sum(bytearray(str_json_data.encode()))
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print('Sum (hex): ', hex(sum_json_data))
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# calculate checksum
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calculated_checksum = sum(bytearray(str_json_data.encode())) & 0xFF
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print('Checksum: ', calculated_checksum)
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print('Checksum (hex): ', hex(calculated_checksum))
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# store and write checksum to new file
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json_data['checksum'] = calculated_checksum
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with open(sys.argv[1], 'w') as f:
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json.dump(json_data, f)
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print('SUCCESS: Checksum written to JSON file!')
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