40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
import binascii
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import botan
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from tests.utils import load_nist_vectors
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BLOCK_SIZE = 64
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def encrypt(mode, key, iv, plaintext):
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encryptor = botan.Cipher("IDEA/{0}/NoPadding".format(mode), "encrypt",
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binascii.unhexlify(key))
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cipher_text = encryptor.cipher(binascii.unhexlify(plaintext),
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binascii.unhexlify(iv))
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return binascii.hexlify(cipher_text)
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def verify_vectors(mode, filename):
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with open(filename, "r") as f:
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vector_file = f.read().splitlines()
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vectors = load_nist_vectors(vector_file)
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for vector in vectors:
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ct = encrypt(
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mode,
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vector["key"],
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vector["iv"],
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vector["plaintext"]
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)
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assert ct == vector["ciphertext"]
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cbc_path = "tests/hazmat/primitives/vectors/ciphers/IDEA/idea-cbc.txt"
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verify_vectors("CBC", cbc_path)
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ofb_path = "tests/hazmat/primitives/vectors/ciphers/IDEA/idea-ofb.txt"
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verify_vectors("OFB", ofb_path)
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cfb_path = "tests/hazmat/primitives/vectors/ciphers/IDEA/idea-cfb.txt"
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verify_vectors("CFB", cfb_path)
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