mbed TLS benchmark

This application benchmarks the various cryptographic primitives offered by mbed TLS.

Pre-requisites

To build and run this example the requirements below are necessary:

A computer with the following software installed:
- CMake.
- yotta. Please note that yotta has its own set of dependencies, listed in the installation instructions.
- Python.
- ARM GCC toolchain.
- A serial terminal emulator (e.g. screen, pySerial, cu).
An FRDM-K64F development board, or another board supported by mbed OS (in that case you'll have to substitute frdm-k64f-gcc with the appropriate target below).
A micro-USB cable.
If your OS is Windows, please follow the installation instructions for the serial port driver.

Getting started

Connect the FRDM-K64F to the computer with the micro-USB cable, being careful to use the micro-usb port labeled “OpenSDA”.
Navigate to the mbedtls directory supplied with your release and open a terminal.
Set the yotta target:
```
yotta target frdm-k64f-gcc
```
Check that there are no missing dependencies:
```
$ yt ls
```
If there are, yotta will list them in the terminal. Please install them before proceeding.
Build mbedtls and the examples. This will take a long time if it is the first time:
```
$ yt build
```
Copy build/frdm-k64f-gcc/test/mbedtls-test-example-benchmark.bin to your mbed board and wait until the LED next to the USB port stops blinking.
Start the serial terminal emulator and connect to the virtual serial port presented by FRDM-K64F. For settings, use 115200 baud, 8N1, no flow control. Warning: for this example, the baud rate is not the default 9600, it is 115200.
Press the reset button on the board.

The output in the terminal window should look like:

{{timeout;150}}
{{host_test_name;default}}
{{description;mbed TLS benchmark program}}
{{test_id;MBEDTLS_BENCHMARK}}
{{start}}


  SHA-1                    :       3644 Kb/s,         32 cycles/byte
  SHA-256                  :       1957 Kb/s,         59 cycles/byte
  SHA-512                  :        587 Kb/s,        200 cycles/byte
  AES-CBC-128              :       1359 Kb/s,         86 cycles/byte
  AES-CBC-192              :       1183 Kb/s,         99 cycles/byte
  AES-CBC-256              :       1048 Kb/s,        111 cycles/byte
  AES-GCM-128              :        421 Kb/s,        279 cycles/byte
  AES-GCM-192              :        403 Kb/s,        292 cycles/byte
  AES-GCM-256              :        385 Kb/s,        305 cycles/byte
  AES-CCM-128              :        542 Kb/s,        216 cycles/byte
  AES-CCM-192              :        484 Kb/s,        242 cycles/byte
  AES-CCM-256              :        437 Kb/s,        268 cycles/byte
  CTR_DRBG (NOPR)          :       1002 Kb/s,        117 cycles/byte
  CTR_DRBG (PR)            :        705 Kb/s,        166 cycles/byte
  HMAC_DRBG SHA-1 (NOPR)   :        228 Kb/s,        517 cycles/byte
  HMAC_DRBG SHA-1 (PR)     :        210 Kb/s,        561 cycles/byte
  HMAC_DRBG SHA-256 (NOPR) :        212 Kb/s,        557 cycles/byte
  HMAC_DRBG SHA-256 (PR)   :        185 Kb/s,        637 cycles/byte
  RSA-2048                 :      41 ms/ public
  RSA-2048                 :    1349 ms/private
  RSA-4096                 :     134 ms/ public
  RSA-4096                 :    7149 ms/private
  ECDSA-secp384r1          :     640 ms/sign
  ECDSA-secp256r1          :     387 ms/sign
  ECDSA-secp384r1          :    1233 ms/verify
  ECDSA-secp256r1          :     751 ms/verify
  ECDHE-secp384r1          :    1191 ms/handshake
  ECDHE-secp256r1          :     730 ms/handshake
  ECDHE-Curve25519         :     611 ms/handshake
  ECDH-secp384r1           :     584 ms/handshake
  ECDH-secp256r1           :     365 ms/handshake
  ECDH-Curve25519          :     303 ms/handshake

{{success}}
{{end}}