mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-23 11:13:09 +00:00
9e62f08e4d
* U2F implementation prototype * U2F data encryption and store, user confirmation request * remove debug prints * fix notification bug in chrome * split u2f_alloc into u2f_init and u2f_alloc * typo fix, furi-hal-trng -> furi-hal-random * rand/srand redefinition * SubGhz: a little bit of Dante. * u2f_data naming fix Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
41 lines
2.5 KiB
Markdown
41 lines
2.5 KiB
Markdown
micro-ecc
|
|
==========
|
|
|
|
A small and fast ECDH and ECDSA implementation for 8-bit, 32-bit, and 64-bit processors.
|
|
|
|
The static version of micro-ecc (ie, where the curve was selected at compile-time) can be found in the "static" branch.
|
|
|
|
Features
|
|
--------
|
|
|
|
* Resistant to known side-channel attacks.
|
|
* Written in C, with optional GCC inline assembly for AVR, ARM and Thumb platforms.
|
|
* Supports 8, 32, and 64-bit architectures.
|
|
* Small code size.
|
|
* No dynamic memory allocation.
|
|
* Support for 5 standard curves: secp160r1, secp192r1, secp224r1, secp256r1, and secp256k1.
|
|
* BSD 2-clause license.
|
|
|
|
Usage Notes
|
|
-----------
|
|
### Point Representation ###
|
|
Compressed points are represented in the standard format as defined in http://www.secg.org/sec1-v2.pdf; uncompressed points are represented in standard format, but without the `0x04` prefix. All functions except `uECC_decompress()` only accept uncompressed points; use `uECC_compress()` and `uECC_decompress()` to convert between compressed and uncompressed point representations.
|
|
|
|
Private keys are represented in the standard format.
|
|
|
|
### Using the Code ###
|
|
|
|
I recommend just copying (or symlink) the uECC files into your project. Then just `#include "uECC.h"` to use the micro-ecc functions.
|
|
|
|
For use with Arduino, you can use the Library Manager to download micro-ecc (**Sketch**=>**Include Library**=>**Manage Libraries**). You can then use uECC just like any other Arduino library (uECC should show up in the **Sketch**=>**Import Library** submenu).
|
|
|
|
See uECC.h for documentation for each function.
|
|
|
|
### Compilation Notes ###
|
|
|
|
* Should compile with any C/C++ compiler that supports stdint.h (this includes Visual Studio 2013).
|
|
* If you want to change the defaults for any of the uECC compile-time options (such as `uECC_OPTIMIZATION_LEVEL`), you must change them in your Makefile or similar so that uECC.c is compiled with the desired values (ie, compile uECC.c with `-DuECC_OPTIMIZATION_LEVEL=3` or whatever).
|
|
* When compiling for a Thumb-1 platform, you must use the `-fomit-frame-pointer` GCC option (this is enabled by default when compiling with `-O1` or higher).
|
|
* When compiling for an ARM/Thumb-2 platform with `uECC_OPTIMIZATION_LEVEL` >= 3, you must use the `-fomit-frame-pointer` GCC option (this is enabled by default when compiling with `-O1` or higher).
|
|
* When compiling for AVR, you must have optimizations enabled (compile with `-O1` or higher).
|
|
* When building for Windows, you will need to link in the `advapi32.lib` system library.
|