compression + encryption (2015)

compression_encryption.py

#!/usr/bin/env python3
import gzip
import simplecrypt

def compress_and_encrypt(sample, secret):
  print('sample:', sample)
  sample_bytes = sample.encode('utf-8')
  print('sample_bytes:', sample_bytes)
  compressed = gzip.compress(sample_bytes)
  print('compressed:', compressed)
  encrypted = simplecrypt.encrypt(secret, compressed)
  print('encrypted:', encrypted)
  return encrypted

def decrypt_and_decompress(encrypted, secret):
  decrypted = simplecrypt.decrypt(secret, encrypted)
  print('decrypted:', decrypted)
  decompressed_bytes = gzip.decompress(decrypted)
  print('decompressed_bytes:', decompressed_bytes)
  decompressed = decompressed_bytes.decode('utf-8')
  print('decompressed:', decompressed)
  return decompressed

def minimal_test():
  sample = "The quick brown fox jumps over the lazy dog."
  secret = "Pack my box with five dozen liquor jugs."
  encrypted = compress_and_encrypt(sample, secret)
  decrypted = decrypt_and_decompress(encrypted, secret)
  assert(sample == decrypted)

if __name__ == '__main__':
  minimal_test()

output.txt

$ ./test-compression.py 
sample: The quick brown fox jumps over the lazy dog.
sample_bytes: b'The quick brown fox jumps over the lazy dog.'
compressed: b'\x1f\x8b\x08\x00Uu\xd2X\x02\xff\x0b\xc9HU(,\xcdL\xceVH*\xca/\xcfSH\xcb\xafP\xc8*\xcd-(V\xc8/K-R(\x01J\xe7$VU*\xa4\xe4\xa7\xeb\x01\x00\xe9%\x90Q,\x00\x00\x00'
encrypted: b"sc\x00\x02\x9cZ\x85I\xcd\xb6\x81\xf7\xb4\xc8F\x0f\x86\xab\xf6&\x15~\x90\t3\xb2^\x91\xd9\xa7z\x93\x9b\x97P\x89\x14R\xf4k\xe8\xf4\xae>\xe85\x958\xab\xe4o\xb1Ee\xc1\xd4xW\xfb\xc1\x99;\x81)O\x08\x9c\xfa42\x00\xab\x01\x8e\xad\xb9\xba/\xdd\x97\xaao4\x85\x140^i|T\x7f\x88\x97|\x93\xf3V[<\xf3%\xfd\x19\xed\xd9\x10'\xcf\xf1K&\xcadX\x00\x1b\xcf\x19 \xd4Q)[MaO\xe6>-\x97p"
decrypted: b'\x1f\x8b\x08\x00Uu\xd2X\x02\xff\x0b\xc9HU(,\xcdL\xceVH*\xca/\xcfSH\xcb\xafP\xc8*\xcd-(V\xc8/K-R(\x01J\xe7$VU*\xa4\xe4\xa7\xeb\x01\x00\xe9%\x90Q,\x00\x00\x00'
decompressed_bytes: b'The quick brown fox jumps over the lazy dog.'
decompressed: The quick brown fox jumps over the lazy dog.