mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-23 17:25:49 +01:00
69 lines
2.7 KiB
Markdown
69 lines
2.7 KiB
Markdown
# Authenticated Encryption Example
|
|
|
|
This application performs authenticated encryption and authenticated decryption of a buffer. It serves as a tutorial for the basic authenticated encryption functions of mbed TLS.
|
|
|
|
## Pre-requisites
|
|
|
|
To build and run this example you must have:
|
|
|
|
* A computer with the following software installed:
|
|
* [CMake](http://www.cmake.org/download/).
|
|
* [yotta](https://github.com/ARMmbed/yotta). Please note that **yotta has its own set of dependencies**, listed in the [installation instructions](http://armmbed.github.io/yotta/#installing-on-windows).
|
|
* [Python](https://www.python.org/downloads/).
|
|
* [The ARM GCC toolchain](https://launchpad.net/gcc-arm-embedded).
|
|
* A serial terminal emulator (Like screen, pySerial and cu).
|
|
* An [FRDM-K64F](http://developer.mbed.org/platforms/FRDM-K64F/) development board, or another board supported by mbed OS (in which case you'll have to substitute frdm-k64f-gcc with the appropriate target in the instructions below).
|
|
* A micro-USB cable.
|
|
* If your OS is Windows, please follow the installation instructions [for the serial port driver](https://developer.mbed.org/handbook/Windows-serial-configuration).
|
|
|
|
## Getting started
|
|
|
|
1. Connect the FRDM-K64F to the computer with the micro-USB cable, being careful to use the "OpenSDA" connector on the target board.
|
|
|
|
2. Navigate to the mbedtls directory supplied with your release and open a terminal.
|
|
|
|
3. Set the yotta target:
|
|
|
|
```
|
|
yotta target frdm-k64f-gcc
|
|
```
|
|
|
|
4. Build mbedtls and the examples. This may take a long time if this is your first compilation:
|
|
|
|
```
|
|
$ yotta build
|
|
```
|
|
|
|
5. Copy `build/frdm-k64f-gcc/test/mbedtls-test-example-authcrypt.bin` to your mbed board and wait until the LED next to the USB port stops blinking.
|
|
|
|
6. Start the serial terminal emulator and connect to the virtual serial port presented by FRDM-K64F.
|
|
|
|
Use the following settings:
|
|
|
|
* 115200 baud (not 9600).
|
|
* 8N1.
|
|
* No flow control.
|
|
|
|
7. Press the Reset button on the board.
|
|
|
|
8. The output in the terminal window should look like:
|
|
|
|
```
|
|
{{timeout;10}}
|
|
{{host_test_name;default}}
|
|
{{description;mbed TLS example authcrypt}}
|
|
{{test_id;MBEDTLS_EX_AUTHCRYPT}}
|
|
{{start}}
|
|
|
|
|
|
plaintext message: 536f6d65207468696e67732061726520626574746572206c65667420756e7265616400
|
|
ciphertext: c57f7afb94f14c7977d785d08682a2596bd62ee9dcf216b8cccd997afee9b402f5de1739e8e6467aa363749ef39392e5c66622b01c7203ec0a3d14
|
|
decrypted: 536f6d65207468696e67732061726520626574746572206c65667420756e7265616400
|
|
|
|
DONE
|
|
{{success}}
|
|
{{end}}
|
|
```
|
|
|
|
The actual output for the ciphertext line will vary on each run because of the use of a random nonce in the encryption process.
|