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kokke 2015-11-10 23:27:08 +01:00
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This is a small and portable implementation of the AES128 ECB and CBC encryption algorithms written in C.
There is no built-in error checking or protection from out-of-bounds memory access errors as a result of malicious input.
The API is very simple and looks like this (I am using C99 `<stdint.h>`-style annotated types):
```C
@ -15,10 +13,11 @@ void AES128_CBC_decrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length,
You can choose to use one or both of the modes-of-operation, by defining the symbols CBC and ECB. See the header file for clarification.
There is no built-in error checking or protection from out-of-bounds memory access errors as a result of malicious input. The two functions AES128_ECB_xxcrypt() do most of the work, and they expect inputs of 128 bit length.
The module uses around 200 bytes of RAM and 2.5K ROM when compiled for ARM (~2K for Thumb but YMMV).
It is one of 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). I am a bit slow to react to pull requests and issues, but I have an ambition to go through all issues sometime in the future and release a stable version.
It is one of 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).
I've successfully used the code on 64bit x86, 32bit ARM and 8 bit AVR platforms.
@ -63,3 +62,4 @@ This implementation is verified against the data in:
All material in this repository is in the public domain.
I am a bit slow to react to pull requests and issues, but I have an ambition to go through all issues sometime in the future and release a stable version.