esp-cryptoauthlib: The port of Microchip CryptoAuthentication Library for ESP-IDF

readme

# ESP-CRYPTOAUTHLIB

This is a port of Microchip's [cryptoauthlib](https://github.com/MicrochipTech/cryptoauthlib) for ESP-IDF. It contains necessary build support to use cryptoauthlib with ESP-IDF as well as `esp_cryptoauthlib_utility` for configuring and provisiong ATECC608A chip connected to an ESP module. Currently the utility is supported for ESP32, ESP32S3 and ESP32C3. The cryptoauthlib folder which is a subset of Microchip's [cryptoauthlib](https://github.com/MicrochipTech/cryptoauthlib) is created with help of script [generate_component.sh](https://github.com/espressif/esp-cryptoauthlib/blob/master/generate_component.sh).

## Requirements

* [ESP-IDF](https://github.com/espressif/esp-idf) version should be `release/v4.3` or newer.
* Environment variable `IDF_PATH` should be set

## How to use esp-cryptoauthlib with ESP-IDF
---
There are two ways to use `esp-cryptoauthlib` in your project

1) Directly add `esp-cryptoauthlib` as a component in your project with following three commands.

    (First change directory (cd) to your project directory)
```
    mkdir components
    cd components
    git clone https://github.com/espressif/esp-cryptoauthlib.git
```
2) Add `esp-cryptoauthlib` as an extra component in your project.

* Download `esp-cryptoauthlib` with:
```
    git clone https://github.com/espressif/esp-cryptoauthlib.git
```
* Include  `esp-cryptoauthlib` in `ESP-IDF` with setting `EXTRA_COMPONENT_DIRS` in CMakeLists.txt/Makefile of your project.For reference see [Optional Project Variables](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html#optional-project-variables)

## How to configure and provision ATECC608
The python utilty `esp_cryptoauth_utility` helps to configure, generate resources as well as provision ATECC608A chip connected to an ESP module.
For detailed instructions on how to use the utility please refer utility [README.md](https://github.com/espressif/esp-cryptoauthlib/blob/master/esp_cryptoauth_utility/README.md)

readme of atecc608_ecdsa example

                                        
                                        | Supported Targets | ESP32 | ESP32-S3 | ESP32-C3 |
| ----------------- | ----- | -------- | -------- |

# ECDSA sign/verify Example with ESP32 series SoC interfaced with ATECC608A

## Description

(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example requires ESP32 platform interfaced with Microchip's [ATECC608A](https://www.microchip.com/wwwproducts/en/ATECC608A) Secure Element.

For making the hardware connections with `ATECC608A` chip (Secure Element), please refer [this](https://github.com/espressif/esp-cryptoauthlib/blob/master/esp_cryptoauth_utility/README.md#using-atecc608a-with-esp32-wroom-32) for details.

The example performs `ECDSA sign/verify` functions on sample data using hardware private key stored in ATECC608A chip.

## How to use example

Before project configuration and build, be sure to set the correct chip target using `idf.py set-target <chip_name>`.

### Hardware Required

* A development board with ESP32 series based SoC
* `ATECC608A` IC based external module or dev. board.
* A USB cable for Power supply and programming

### Configure the project

Hardware should be configured to run the example, for details on configuration of ATECC608A chip, please refer [esp_cryptoauth_utility](https://github.com/espressif/esp-cryptoauthlib/blob/master/esp_cryptoauth_utility/README.md#esp_cryptoauth_utility)

Open the project configuration menu (`idf.py menuconfig`). 

In the `Component config -> esp-cryptoauthlib` menu:

* Use `Choose the type of ATECC608A chip` to set the Crypto IC type [1].
* Use `Enable Hardware ECDSA keys for mbedTLS` Enable Hardware ECDSA.
    * Set `Enable ATECC608A sign operations in mbedTLS` to use Hardware ECDSA sign.
    * Set `Enable ATECC608A verify operations in mbedTLS` to use Hardware ECDSA verify.
* Set `I2C SDA pin used to communicate with the ATECC608A`.
* Set `I2C SCL pin used to communicate with the ATECC608A`.

[1]: for more details refer [Find ATECC608A chip type](https://github.com/espressif/esp-cryptoauthlib/blob/master/esp_cryptoauth_utility/README.md).

### Build and Flash

Build the project and flash it to the board, then run the monitor tool to view the serial output:

Run `idf.py -p PORT flash monitor` to build, flash and monitor the project.

(To exit the serial monitor, type ``Ctrl-]``.)

See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for all the steps to configure and use the ESP-IDF to build projects.

## Troubleshooting

For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.

                                    

Links

Supports all targets

License: Custom

To add this component to your project, run:

idf.py add-dependency "espressif/esp-cryptoauthlib^3.5.1~3"

or download archive

Dependencies

  • ESP-IDF >=4.3
  • Examples:

    atecc608_ecdsa

    more details

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