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add an aes test

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This combines some test vectors from the implementation & a NIST
standards document, plus the code from the docstring.

The test vectors were eyeball-verified.
This commit is contained in:
Jeff Epler 2021-11-28 15:09:03 -06:00
parent 62895b2636
commit 1654f5fb58
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2 changed files with 135 additions and 0 deletions
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99
tests/circuitpython/aes.py Normal file
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import aesio
from binascii import hexlify, unhexlify
# doc example
key = b"Sixteen byte key"
inp = b"CircuitPython!!!" # Note: 16-bytes long
outp = bytearray(len(inp))
cipher = aesio.AES(key, aesio.MODE_ECB)
cipher.encrypt_into(inp, outp)
print(str(hexlify(outp), ""))
cipher = aesio.AES(key, aesio.MODE_ECB)
cipher.decrypt_into(outp, outp)
print(str(outp, ""))
print()
print("ECB")
# ECB mode test vector, from the aes.c source
plaintext = unhexlify(
"6bc1bee22e409f96e93d7e117393172a"
"ae2d8a571e03ac9c9eb76fac45af8e51"
"30c81c46a35ce411e5fbc1191a0a52ef"
"f69f2445df4f9b17ad2b417be66c3710"
)
key = unhexlify("2b7e151628aed2a6abf7158809cf4f3c")
cyphertext = bytearray(len(plaintext))
cipher = aesio.AES(key, aesio.MODE_ECB)
for i in range(0, len(plaintext), 16):
output = memoryview(cyphertext)[i : i + 16]
cipher.encrypt_into(plaintext[i : i + 16], output)
print(str(hexlify(output), ""))
print()
plaintext = bytearray(len(plaintext))
cipher = aesio.AES(key, aesio.MODE_ECB)
for i in range(0, len(plaintext), 16):
output = memoryview(plaintext)[i : i + 16]
cipher.decrypt_into(cyphertext[i : i + 16], output)
print(str(hexlify(output), ""))
print()
print("CBC")
# CBC128-AES128 test vector from NIST Special Publication 800-38A, 2001 edition, p50
plaintext = unhexlify(
"6bc1bee22e409f96e93d7e117393172a"
"ae2d8a571e03ac9c9eb76fac45af8e51"
"30c81c46a35ce411e5fbc1191a0a52ef"
"f69f2445df4f9b17ad2b417be66c3710"
)
key = unhexlify("2b7e151628aed2a6abf7158809cf4f3c")
iv = unhexlify("000102030405060708090a0b0c0d0e0f")
cyphertext = bytearray(len(plaintext))
cipher = aesio.AES(key, aesio.MODE_CBC, IV=iv)
for i in range(0, len(plaintext), 16):
output = memoryview(cyphertext)[i : i + 16]
cipher.encrypt_into(plaintext[i : i + 16], output)
print(str(hexlify(output), ""))
print()
plaintext = bytearray(len(plaintext))
cipher = aesio.AES(key, aesio.MODE_CBC, IV=iv)
for i in range(0, len(plaintext), 16):
output = memoryview(plaintext)[i : i + 16]
cipher.decrypt_into(cyphertext[i : i + 16], output)
print(str(hexlify(output), ""))
print()
print("CTR")
# CTR128-AES128 test vector from NIST Special Publication 800-38A, 2001 edition, p55
plaintext = unhexlify(
"6bc1bee22e409f96e93d7e117393172a"
"ae2d8a571e03ac9c9eb76fac45af8e51"
"30c81c46a35ce411e5fbc1191a0a52ef"
"f69f2445df4f9b17ad2b417be66c3710"
)
key = unhexlify("2b7e151628aed2a6abf7158809cf4f3c")
counter = unhexlify("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff")
cyphertext = bytearray(len(plaintext))
cipher = aesio.AES(key, aesio.MODE_CTR, IV=counter)
for i in range(0, len(plaintext), 16):
output = memoryview(cyphertext)[i : i + 16]
cipher.encrypt_into(plaintext[i : i + 16], output)
print(str(hexlify(output), ""))
print()
plaintext = bytearray(len(plaintext))
cipher = aesio.AES(key, aesio.MODE_CTR, IV=counter)
for i in range(0, len(plaintext), 16):
output = memoryview(plaintext)[i : i + 16]
cipher.decrypt_into(cyphertext[i : i + 16], output)
print(str(hexlify(output), ""))
print()

36
tests/circuitpython/aes.py.exp Normal file
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abb1a1f98f57409e455ac06e71535ffe
CircuitPython!!!
ECB
3ad77bb40d7a3660a89ecaf32466ef97
f5d3d58503b9699de785895a96fdbaaf
43b1cd7f598ece23881b00e3ed030688
7b0c785e27e8ad3f8223207104725dd4
6bc1bee22e409f96e93d7e117393172a
ae2d8a571e03ac9c9eb76fac45af8e51
30c81c46a35ce411e5fbc1191a0a52ef
f69f2445df4f9b17ad2b417be66c3710
CBC
7649abac8119b246cee98e9b12e9197d
5086cb9b507219ee95db113a917678b2
73bed6b8e3c1743b7116e69e22229516
3ff1caa1681fac09120eca307586e1a7
6bc1bee22e409f96e93d7e117393172a
ae2d8a571e03ac9c9eb76fac45af8e51
30c81c46a35ce411e5fbc1191a0a52ef
f69f2445df4f9b17ad2b417be66c3710
CTR
874d6191b620e3261bef6864990db6ce
9806f66b7970fdff8617187bb9fffdff
5ae4df3edbd5d35e5b4f09020db03eab
1e031dda2fbe03d1792170a0f3009cee
6bc1bee22e409f96e93d7e117393172a
ae2d8a571e03ac9c9eb76fac45af8e51
30c81c46a35ce411e5fbc1191a0a52ef
f69f2445df4f9b17ad2b417be66c3710