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kokke 2014-07-12 20:53:20 +02:00
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@ -9,7 +9,7 @@ void AES128_ECB_encrypt(uint8_t* input, uint8_t* key, uint8_t *output);
void AES128_ECB_decrypt(uint8_t* input, uint8_t* key, uint8_t *output); void AES128_ECB_decrypt(uint8_t* input, uint8_t* key, uint8_t *output);
``` ```
The module uses just a bit more than 200 bytes of RAM and 2.5K ROM when compiled for ARM (<2K for Thumb but YMMV). The module uses just a bit more than 200 bytes of RAM and 2.5K ROM when compiled for ARM (~2K for Thumb but 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). 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).
@ -27,7 +27,7 @@ GCC size output when compiled for ARM:
2515 0 204 2719 a9f aes.o 2515 0 204 2719 a9f aes.o
.. and when compiling for the THUMB instruction set, we end up at just below 2K in code size. .. and when compiling for the THUMB instruction set, we end up around 2K in code size.
$ arm-none-eabi-gcc -mthumb -Os -c aes.c $ arm-none-eabi-gcc -mthumb -Os -c aes.c
$ size aes.o $ size aes.o