kopia lustrzana https://github.com/micropython/micropython
41 wiersze
1.4 KiB
ReStructuredText
41 wiersze
1.4 KiB
ReStructuredText
:mod:`cryptolib` -- cryptographic ciphers
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=========================================
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.. module:: cryptolib
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:synopsis: cryptographic ciphers
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Classes
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-------
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.. class:: aes
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.. classmethod:: __init__(key, mode, [IV])
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Initialize cipher object, suitable for encryption/decryption. Note:
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after initialization, cipher object can be use only either for
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encryption or decryption. Running decrypt() operation after encrypt()
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or vice versa is not supported.
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Parameters are:
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* *key* is an encryption/decryption key (bytes-like).
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* *mode* is:
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* ``1`` (or ``cryptolib.MODE_ECB`` if it exists) for Electronic Code Book (ECB).
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* ``2`` (or ``cryptolib.MODE_CBC`` if it exists) for Cipher Block Chaining (CBC).
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* ``6`` (or ``cryptolib.MODE_CTR`` if it exists) for Counter mode (CTR).
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* *IV* is an initialization vector for CBC mode.
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* For Counter mode, *IV* is the initial value for the counter.
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.. method:: encrypt(in_buf, [out_buf])
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Encrypt *in_buf*. If no *out_buf* is given result is returned as a
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newly allocated `bytes` object. Otherwise, result is written into
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mutable buffer *out_buf*. *in_buf* and *out_buf* can also refer
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to the same mutable buffer, in which case data is encrypted in-place.
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.. method:: decrypt(in_buf, [out_buf])
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Like `encrypt()`, but for decryption.
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