cryptolib – cryptographic ciphers — MicroPython latest documentation (original) (raw)

This is the documentation for the latest development branch of MicroPython and may refer to features that are not available in released versions.

If you are looking for the documentation for a specific release, use the drop-down menu on the left and select the desired version.

Classes¶

class cryptolib.aes¶

classmethod __init__(key, _mode_[, _IV_])¶

Initialize cipher object, suitable for encryption/decryption. Note: after initialization, cipher object can be use only either for encryption or decryption. Running decrypt() operation after encrypt() or vice versa is not supported.

Parameters are:

• key is an encryption/decryption key (bytes-like).
• mode is:

  • 1 (or cryptolib.MODE_ECB if it exists) for Electronic Code Book (ECB).
  • 2 (or cryptolib.MODE_CBC if it exists) for Cipher Block Chaining (CBC).
  • 6 (or cryptolib.MODE_CTR if it exists) for Counter mode (CTR).

• IV is an initialization vector for CBC mode.
• For Counter mode, IV is the initial value for the counter.

encrypt(_in_buf_[, _out_buf_])¶

Encrypt in_buf. If no out_buf is given result is returned as a newly allocated bytes object. Otherwise, result is written into mutable buffer out_buf. in_buf and out_buf can also refer to the same mutable buffer, in which case data is encrypted in-place.

decrypt(_in_buf_[, _out_buf_])¶

Like encrypt(), but for decryption.