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import os

import saml2.aes


class TestAES():
    def test_aes_defaults(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(16)
        aes = saml2.aes.AESCipher(key)

        encrypted_msg = aes.encrypt(original_msg)
        decrypted_msg = aes.decrypt(encrypted_msg)
        assert decrypted_msg == original_msg

    def test_aes_128_cbc(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(16)
        aes = saml2.aes.AESCipher(key)
        alg = 'aes_128_cbc'

        encrypted_msg = aes.encrypt(original_msg, alg=alg)
        decrypted_msg = aes.decrypt(encrypted_msg, alg=alg)
        assert decrypted_msg == original_msg

    def test_aes_128_cfb(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(16)
        aes = saml2.aes.AESCipher(key)
        alg = 'aes_128_cfb'

        encrypted_msg = aes.encrypt(original_msg, alg=alg)
        decrypted_msg = aes.decrypt(encrypted_msg, alg=alg)
        assert decrypted_msg == original_msg

    def test_aes_192_cbc(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(24)
        aes = saml2.aes.AESCipher(key)
        alg = 'aes_192_cbc'

        encrypted_msg = aes.encrypt(original_msg, alg=alg)
        decrypted_msg = aes.decrypt(encrypted_msg, alg=alg)
        assert decrypted_msg == original_msg

    def test_aes_192_cfb(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(24)
        aes = saml2.aes.AESCipher(key)
        alg = 'aes_192_cfb'

        encrypted_msg = aes.encrypt(original_msg, alg=alg)
        decrypted_msg = aes.decrypt(encrypted_msg, alg=alg)
        assert decrypted_msg == original_msg

    def test_aes_256_cbc(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(32)
        aes = saml2.aes.AESCipher(key)
        alg = 'aes_256_cbc'

        encrypted_msg = aes.encrypt(original_msg, alg=alg)
        decrypted_msg = aes.decrypt(encrypted_msg, alg=alg)
        assert decrypted_msg == original_msg

    def test_aes_256_cfb(self):
        original_msg = b'ToBeOrNotTobe W.S.'
        key = os.urandom(32)
        aes = saml2.aes.AESCipher(key)
        alg = 'aes_256_cfb'

        encrypted_msg = aes.encrypt(original_msg, alg=alg)
        decrypted_msg = aes.decrypt(encrypted_msg, alg=alg)
        assert decrypted_msg == original_msg