Commit Graph

7 Commits

Author SHA1 Message Date
Damien George 8769a3e38c extmod/moducryptolib: Don't include arpa/inet.h, it's not needed.
And some ports (eg esp8266) don't have it.
2018-06-27 16:44:59 +10:00
Yonatan Goldschmidt 31f2f1e967 extmod/moducryptolib: Shorten exception messages to reduce code size. 2018-06-27 16:44:59 +10:00
Yonatan Goldschmidt d0507c084c extmod/moducryptolib: Prefix all Python methods/objects with ucryptolib.
Follows what was done in b045ebd35 for uhashlib.
2018-06-27 16:44:59 +10:00
Yonatan Goldschmidt eacb233b8f extmod/moducryptolib: Add an mbedTLS implementation for this module. 2018-06-27 16:44:59 +10:00
Yonatan Goldschmidt e328b4593c extmod/moducryptolib: Refactor functions for clean interface with axTLS.
This will allow implementations other than axTLS.

This commit includes additions of checks and clarifications of exceptions
related to user input.

To make the interface cleaner, I've disallowed switching from encrypt to
decrypt in the same object, as this is not always possible with other
crypto libraries (not all libraries have AES_convert_key like axTLS).
2018-06-27 16:44:59 +10:00
Yonatan Goldschmidt 473fe45da2 extmod/moducryptolib: Optionally export MODE_* constants to Python.
Allow including crypto consts based on compilation settings.  Disabled by
default to reduce code size; if one wants extra code readability, can
enable them.
2018-06-27 16:29:26 +10:00
Paul Sokolovsky 567bc2d6ce extmod/moducryptolib: Add ucryptolib module with crypto functions.
The API follows guidelines of https://www.python.org/dev/peps/pep-0272/,
but is optimized for code size, with the idea that full PEP 0272
compatibility can be added with a simple Python wrapper mode.

The naming of the module follows (u)hashlib pattern.

At the bare minimum, this module is expected to provide:

* AES128, ECB (i.e. "null") mode, encrypt only

Implementation in this commit is based on axTLS routines, and implements
following:

* AES 128 and 256
* ECB and CBC modes
* encrypt and decrypt
2018-06-27 14:54:40 +10:00