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kokke
2014-05-31 00:45:42 +02:00
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### Tiny AES128 in C ### Tiny AES128 in C
This is a small portable implementation of AES128 in C. This is the smallest implementation in C I've seen yet, but if you find something smaller (or have improvements for the code in this project) please contact me or fork the project. This is a small and portable implementation of the AES128 algorithm implemented in C.
The module uses just a bit more than 200 bytes of RAM and 1K ROM when compiled for ARM (YMMV).
It is the smallest implementation in C I've seen yet, but do contact me if you know of something smaller (or have improvements to the code here).
The code is tested on Intel 64bit, 32bit ARM Cortex-M3 and 8 bit Atmel Mega16.
The module uses just a bit more than 200 bytes of RAM and 1K ROM when compiled for ARM. I've successfully used the code on 64bit x86, 32bit ARM and 8 bit AVR platforms.
YMMV depending on target platform and optimization skills of your compiler.
GCC size output when compiled for ARM: GCC size output when compiled for ARM:
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The implementation is verified against the data in: The implementation is verified against the data in:
[National Institute of Standards and Technology Special Publication 800-38A 2001 ED](http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf) Appendix F: Example Vectors for Modes of Operation of the AES. [National Institute of Standards and Technology Special Publication 800-38A 2001 ED](http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf) Appendix F: Example Vectors for Modes of Operation of the AES.
Note: AES128 ECB is symmetric, so you use the same function for encrypting and decrypting.