This code example shows how to generate a 32-byte hash value or message digest for an arbitrary user input message with the SHA-2 algorithm using the Cryptographic hardware block in the MCU. The example further shows that any change in the message results in a unique hash value for the message. The hash value generated for the message is displayed on a UART terminal emulator.
Provide feedback on this code example.
- ModusToolbox™ v3.1 or later (tested with v3.3)
- Programming language: C
- Associated parts: XMC7000 MCU, TRAVEO™ T2G Body High MCU
- GNU Arm® Embedded Compiler v11.3.1 (
GCC_ARM) – Default value ofTOOLCHAIN - Arm® Compiler v6.22 (
ARM) - IAR C/C++ Compiler v9.50.2 (
IAR)
- XMC7200 Evaluation Kit (
KIT_XMC72_EVK) – Default value ofTARGET - TRAVEO™ T2G Body High Evaluation Kit (
KIT_T2G-B-H_EVK) - TRAVEO™ T2G Body High Evaluation Kit (
KIT_T2G-B-H_LITE) - XMC7100 Evaluation Kit (
KIT_XMC71_EVK_LITE_V1)
This example uses the board's default configuration. See the kit user guide to ensure that the board is configured correctly.
See the ModusToolbox™ tools package installation guide for information about installing and configuring the tools package.
Install a terminal emulator if you don't have one. Instructions in this document use Tera Term.
The ModusToolbox™ tools package provides the Project Creator as both a GUI tool and a command line tool.
Use Project Creator GUI
-
Open the Project Creator GUI tool.
There are several ways to do this, including launching it from the dashboard or from inside the Eclipse IDE. For more details, see the Project Creator user guide (locally available at {ModusToolbox™ install directory}/tools_{version}/project-creator/docs/project-creator.pdf).
-
On the Choose Board Support Package (BSP) page, select a kit supported by this code example. See Supported kits.
Note: To use this code example for a kit not listed here, you may need to update the source files. If the kit does not have the required resources, the application may not work.
-
On the Select Application page:
a. Select the Applications(s) Root Path and the Target IDE.
Note: Depending on how you open the Project Creator tool, these fields may be pre-selected for you.
b. Select this code example from the list by enabling its check box.
Note: You can narrow the list of displayed examples by typing in the filter box.
c. (Optional) Change the suggested New Application Name and New BSP Name.
d. Click Create to complete the application creation process.
Use Project Creator CLI
The 'project-creator-cli' tool can be used to create applications from a CLI terminal or from within batch files or shell scripts. This tool is available in the {ModusToolbox™ install directory}/tools_{version}/project-creator/ directory.
Use a CLI terminal to invoke the 'project-creator-cli' tool. On Windows, use the command-line 'modus-shell' program provided in the ModusToolbox™ installation instead of a standard Windows command-line application. This shell provides access to all ModusToolbox™ tools. You can access it by typing "modus-shell" in the search box in the Windows menu. In Linux and macOS, you can use any terminal application.
The following example clones the "mtb-example-pdl-xmc7000-crypto-sha" application with the desired name "Cryptography_SHA_Demonstration" configured for the KIT_XMC72_EVK BSP into the specified working directory, C:/mtb_projects:
project-creator-cli --board-id KIT_XMC72_EVK --app-id mtb-example-pdl-xmc7000-crypto-sha --user-app-name Cryptography_SHA_Demonstration --target-dir "C:/mtb_projects"
The 'project-creator-cli' tool has the following arguments:
| Argument | Description | Required/optional |
|---|---|---|
--board-id |
Defined in the field of the BSP manifest | Required |
--app-id |
Defined in the field of the CE manifest | Required |
--target-dir |
Specify the directory in which the application is to be created if you prefer not to use the default current working directory | Optional |
--user-app-name |
Specify the name of the application if you prefer to have a name other than the example's default name | Optional |
Note: The project-creator-cli tool uses the
git cloneandmake getlibscommands to fetch the repository and import the required libraries. For details, see the "Project creator tools" section of the ModusToolbox™ tools package user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf).
After the project has been created, you can open it in your preferred development environment.
Eclipse IDE
If you opened the Project Creator tool from the included Eclipse IDE, the project will open in Eclipse automatically.
For more details, see the Eclipse IDE for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_ide_user_guide.pdf).
Visual Studio (VS) Code
Launch VS Code manually, and then open the generated {project-name}.code-workspace file located in the project directory.
For more details, see the Visual Studio Code for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_vscode_user_guide.pdf).
Keil µVision
Double-click the generated {project-name}.cprj file to launch the Keil µVision IDE.
For more details, see the Keil µVision for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_uvision_user_guide.pdf).
IAR Embedded Workbench
Open IAR Embedded Workbench manually, and create a new project. Then select the generated {project-name}.ipcf file located in the project directory.
For more details, see the IAR Embedded Workbench for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_iar_user_guide.pdf).
Command line
If you prefer to use the CLI, open the appropriate terminal, and navigate to the project directory. On Windows, use the command-line 'modus-shell' program; on Linux and macOS, you can use any terminal application. From there, you can run various make commands.
For more details, see the ModusToolbox™ tools package user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf).
-
Connect the board to your PC using the provided USB cable through the KitProg3 USB connector.
-
Open a terminal program and select the KitProg3 COM port. Set the serial port parameters to 8N1 and 115200 baud.
-
Program the board using one of the following:
Using Eclipse IDE
-
Select the application project in the Project Explorer.
-
In the Quick Panel, scroll down, and click <Application Name> Program (KitProg3_MiniProg4).
In other IDEs
Follow the instructions in your preferred IDE.
Using CLI
From the terminal, execute the
make programcommand to build and program the application using the default toolchain to the default target. The default toolchain is specified in the application's Makefile but you can override this value manually:make program TOOLCHAIN=<toolchain>Example:
make program TOOLCHAIN=GCC_ARM -
-
Press the reset button on the kit and enter the message for which the hash value or message digest should be generated. The generated hash value is printed on the UART terminal. Note that the SHA operation generates a unique hash value for every input message.
For example, the message "The quick brown fox jumps over the lazy dog", which uses every letter in the English alphabets, has a message digest value completely different from the message digest value for the message “The quick brown fox jumps over the lazy Dog” even though the variation is minor (‘D’ instead of ‘d’).
Figure 1. Sample output as displayed on Tera Term
You can debug the example to step through the code.
In Eclipse IDE
Use the <Application Name> Debug (KitProg3_MiniProg4) configuration in the Quick Panel. For details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ user guide.
In other IDEs
Follow the instructions in your preferred IDE.
Secure hash algorithm (SHA) is a function that takes a message of arbitrary length and reduces it to a fixed length residue or message digest, after performing a series of mathematically defined operations that practically guarantee that any change in the message will change the hash value. A hash value is used for message authentication by transmitting a message with a hash value appended to it and recalculating the message hash value using the same algorithm at the recipient’s end. If the hashes differ, it indicates that the message has been corrupted.
In this example, the user input message is read from the UART terminal. A 32-byte long hash value is generated using the SHA-2 algorithm. For any arbitrary message, a 32-byte hash value is generated. The 32-byte hash value for the user input message is then displayed on the UART terminal emulator. Note that the maximum message size is restricted to 100 characters in this example. If you need to increase the message size, change the MAX_MESSAGE_SIZE macro in the main.c file to the message size you require.
Figure 2. Firmware flowchart
Table 1 lists the ModusToolbox™ resources used in this example and how they are used in the design.
Table 1. Application resources
| Resource | Alias/object | Purpose |
|---|---|---|
| UART (HAL) | cy_retarget_io_uart_obj | UART HAL object used by Retarget-IO for the Debug UART port |
| Crypto (PDL) | Crypto | SHA2 based message digest using the Crypto hardware block |
| Resources | Links |
|---|---|
| Application notes | AN234334 – Getting started with XMC7000 MCU on ModusToolbox™ software AN234196 - XMC7000: Using the CRYPTO module |
| Code examples | Using ModusToolbox™ on GitHub |
| Device documentation | XMC7000 MCU documents |
| Development kits | Select your kits from the Evaluation board finder. |
| Libraries on GitHub | mtb-pdl-cat1 – Peripheral Driver Library (PDL) mtb-hal-cat1 – Hardware Abstraction Layer (HAL) library |
| Middleware on GitHub | mcu-middleware – Links to all MCU middleware |
| Tools | ModusToolbox™ – ModusToolbox™ software is a collection of easy-to-use libraries and tools enabling rapid development with Infineon MCUs for applications ranging from wireless and cloud-connected systems, edge AI/ML, embedded sense and control, to wired USB connectivity using PSOC™ Industrial/IoT MCUs, AIROC™ Wi-Fi and Bluetooth® connectivity devices, XMC™ Industrial MCUs, and EZ-USB™/EZ-PD™ wired connectivity controllers. ModusToolbox™ incorporates a comprehensive set of BSPs, HAL, libraries, configuration tools, and provides support for industry-standard IDEs to fast-track your embedded application development. |
Infineon provides a wealth of data at www.infineon.com to help you select the right device, and quickly and effectively integrate it into your design.
For XMC™ MCU devices, see 32-bit XMC™ industrial microcontroller based on Arm® Cortex®-M.
Document title: CE234842 - PDL cryptography: SHA demonstration
| Version | Description of change |
|---|---|
| 1.0.0 | New code example |
| 1.1.0 | Added support for KIT_T2G-B-H_EVK, KIT_T2G-B-H_LITE |
| 1.2.0 | Updated latest KIT_XMC72_EVK BSP and description of main API |
| 2.0.0 | Updated to support ModusToolbox™ v3.1 and added support for KIT_XMC71_EVK_LITE_V1 |
| 2.0.1 | Disabled D-cache for XMC7000 based BSPs |
| 2.1.0 | Enabled D-cache support for XMC7000 devices |
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