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  1. def bytes2matrix(text):
  2.     """ Converts a 16-byte array into a 4x4 matrix.  """
  3.     return [list(text[i:i+4]) for i in range(0, len(text), 4)]
  4.  
  5. def matrix2bytes(matrix):
  6.     """ Converts a 4x4 matrix into a 16-byte array.  """
  7.     return bytes(sum(matrix, []))
  8.  
  9. matrix = [
  10.     [99, 114, 121, 112],
  11.     [116, 111, 123, 105],
  12.     [110, 109, 97, 116],
  13.     [114, 105, 120, 125],
  14. ]
  15.  
  16. print(matrix2bytes(matrix))
  17.  
Success #stdin #stdout 0.03s 9740KB
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Standard input is empty
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b'crypto{inmatrix}'
https://ideone.com/hVPA1T
language:
Python 3 (python  3.9.5)
created:
18 days ago
visibility:
public

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