micropython/tests/extmod/ucryptolib_aes128_ecb_inpl.py

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# Inplace operations (input and output buffer is the same)
try:
from ucryptolib import aes
except ImportError:
print("SKIP")
raise SystemExit
crypto = aes(b"1234" * 4, 1)
buf = bytearray(bytes(range(32)))
crypto.encrypt(buf, buf)
print(buf)
crypto = aes(b"1234" * 4, 1)
crypto.decrypt(buf, buf)
print(buf)