Update README.md

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kokke 2014-07-12 02:11:37 +02:00
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### Tiny AES128 in C
This is a small and portable implementation of the AES128 ECB encryption algorithm implemented in C. I haven't finished the decryption part yet, but it will come.
This is a small and portable implementation of the AES128 ECB encryption algorithm implemented in C.
The module uses just a bit more than 200 bytes of RAM and 1K ROM when compiled for ARM (YMMV).
The module uses just a bit more than 200 bytes of RAM and 2.7K 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).
@ -14,10 +14,10 @@ GCC size output when compiled for ARM:
$ arm-none-eabi-gcc -Os -c -mthumb aes.c -o aes.o
$ arm-none-eabi-gcc -Os -c aes.c
$ size aes.o
text data bss dec hex filename
1107 0 204 1311 51f aes.o
2515 0 204 2719 a9f aes.o
I am using Mentor Graphics free ARM toolchain: