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kokke 2014-07-12 20:52:42 +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);
```
The module uses just a bit more than 200 bytes of RAM and 2.5K ROM when compiled for ARM (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).
@ -27,6 +27,14 @@ GCC size output when compiled for ARM:
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.
$ arm-none-eabi-gcc -mthumb -Os -c aes.c
$ size aes.o
text data bss dec hex filename
1883 0 204 2087 827 aes.o
I am using Mentor Graphics free ARM toolchain: