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Quickstart: Provision an X.509 certificate simulated device

  • Article

In this quickstart, you create a simulated device on your Windows machine. The simulated device is configured to use X.509 certificate attestation for authentication. After you configure your device, you then provision it to your IoT hub using the Azure IoT Hub Device Provisioning Service.

If you're unfamiliar with the process of provisioning, review the provisioning overview. Also make sure that you complete the steps in Set up IoT Hub Device Provisioning Service with the Azure portal before continuing.

This quickstart demonstrates a solution for a Windows-based workstation. However, you can also perform the procedures on Linux. For a Linux example, see Tutorial: Provision for geo latency.

Prerequisites

The following prerequisites are for a Windows development environment. For Linux or macOS, see the appropriate section in Prepare your development environment in the SDK documentation.

  • Install Visual Studio 2022 with the 'Desktop development with C++' workload enabled. Visual Studio 2015, Visual Studio 2017, and Visual Studio 19 are also supported. For Linux or macOS, see the appropriate section in Prepare your development environment in the SDK documentation.

  • Install the latest CMake build system. Make sure you check the option that adds the CMake executable to your path.

    Important

    Confirm that the Visual Studio prerequisites (Visual Studio and the 'Desktop development with C++' workload) are installed on your machine, before starting the CMake installation. Once the prerequisites are in place, and the download is verified, install the CMake build system. Also, be aware that older versions of the CMake build system fail to generate the solution file used in this article. Make sure to use the latest version of CMake.

The following prerequisites are for a Windows development environment. For Linux or macOS, see the appropriate section in Prepare your development environment in the SDK documentation.

  • Install .NET SDK 6.0 or later on your Windows-based machine. You can use the following command to check your version.

    dotnet --info

The following prerequisites are for a Windows development environment. For Linux or macOS, see the appropriate section in Prepare your development environment in the SDK documentation.

The following prerequisites are for a Windows development environment.

The following prerequisites are for a Windows development environment. For Linux or macOS, see the appropriate section in Prepare your development environment in the SDK documentation.

  • Install the latest version of Git. Make sure that Git is added to the environment variables accessible to the command window. See Software Freedom Conservancy's Git client tools for the latest version of git tools to install, which includes Git Bash, the command-line app that you can use to interact with your local Git repository.

  • Make sure OpenSSL is installed on your machine. On Windows, your installation of Git includes an installation of OpenSSL. You can access OpenSSL from the Git Bash prompt. To verify that OpenSSL is installed, open a Git Bash prompt and enter openssl version.

    Note

    Unless you're familiar with OpenSSL and already have it installed on your Windows machine, we recommend using OpenSSL from the Git Bash prompt. Alternatively, you can choose to download the source code and build OpenSSL. To learn more, see the OpenSSL Downloads page. Or, you can download OpenSSL pre-built from a third-party. To learn more, see the OpenSSL wiki. Microsoft makes no guarantees about the validity of packages downloaded from third-parties. If you do choose to build or download OpenSSL make sure that the OpenSSL binary is accessible in your path and that the OPENSSL_CNF environment variable is set to the path of your openssl.cnf file.

  • Open both a Windows command prompt and a Git Bash prompt.

    The steps in this quickstart assume that you're using a Windows machine and the OpenSSL installation that is installed as part of Git. You use the Git Bash prompt to issue OpenSSL commands and the Windows command prompt for everything else. If you're using Linux, you can issue all commands from a Bash shell.

Prepare your development environment

In this section, you prepare a development environment that's used to build the Azure IoT C SDK. The sample code attempts to provision the device, during the device's boot sequence.

  1. Open a web browser, and go to the Release page of the Azure IoT C SDK.

  2. Select the Tags tab at the top of the page.

  3. Copy the tag name for the latest release of the Azure IoT C SDK.

  4. In your Windows command prompt, run the following commands to clone the latest release of the Azure IoT Device SDK for C GitHub repository. Replace <release-tag> with the tag you copied in the previous step, for example: lts_01_2023.

    git clone -b <release-tag> https://github.com/Azure/azure-iot-sdk-c.git
cd azure-iot-sdk-c
git submodule update --init

    This operation could take several minutes to complete.

  5. When the operation is complete, run the following commands from the azure-iot-sdk-c directory:

    mkdir cmake
cd cmake

  6. The code sample uses an X.509 certificate to provide attestation via X.509 authentication. Run the following command to build a version of the SDK specific to your development platform that includes the device provisioning client. A Visual Studio solution for the simulated device is generated in the cmake directory.

    When specifying the path used with -Dhsm_custom_lib in the following command, make sure to use the absolute path to the library in the cmake directory you previously created. The path shown assumes that you cloned the C SDK in the root directory of the C drive. If you used another directory, adjust the path accordingly.

    cmake -Duse_prov_client:BOOL=ON -Dhsm_custom_lib=c:/azure-iot-sdk-c/cmake/provisioning_client/samples/custom_hsm_example/Debug/custom_hsm_example.lib ..

Tip

If cmake doesn't find your C++ compiler, you may get build errors while running the above command. If that happens, try running the command in the Visual Studio command prompt.

  1. When the build succeeds, the last few output lines look similar to the following output:

    -- Building for: Visual Studio 17 2022
-- Selecting Windows SDK version 10.0.19041.0 to target Windows 10.0.22000.
-- The C compiler identification is MSVC 19.32.31329.0
-- The CXX compiler identification is MSVC 19.32.31329.0

...

-- Configuring done
-- Generating done
-- Build files have been written to: C:/azure-iot-sdk-c/cmake

In your Windows command prompt, clone the Azure IoT SDK for C# GitHub repository using the following command:

git clone https://github.com/Azure/azure-iot-sdk-csharp.git

In your Windows command prompt, clone the Azure IoT SDK for Node.js GitHub repository using the following command:

git clone https://github.com/Azure/azure-iot-sdk-node.git

In your Windows command prompt, clone the Azure IoT Device SDK for Python GitHub repository using the following command:

git clone -b v2 https://github.com/Azure/azure-iot-sdk-python.git --recursive

Note

The samples used in this tutorial are in the v2 branch of the azure-iot-sdk-python repository. V3 of the Python SDK is available to use in beta.

  1. In your Windows command prompt, clone the Azure IoT Samples for Java GitHub repository using the following command:

    git clone https://github.com/Azure/azure-iot-sdk-java.git --recursive

  2. Go to the root azure-iot-sdk-java directory and build the project to download all needed packages.

    cd azure-iot-sdk-java
mvn install -DskipTests=true

Create a self-signed X.509 device certificate

In this section, you use OpenSSL to create a self-signed X.509 certificate and a private key. This certificate is uploaded to your provisioning service instance and verified by the service.

Caution

Use certificates created with OpenSSL in this quickstart for development testing only. Do not use these certificates in production. These certificates expire after 30 days and may contain hard-coded passwords, such as 1234. To learn about obtaining certificates suitable for use in production, see How to get an X.509 CA certificate in the Azure IoT Hub documentation.

Perform the steps in this section in your Git Bash prompt.

  1. In your Git Bash prompt, navigate to a directory where you'd like to create your certificates.

  2. Run the following command:

    winpty openssl req -outform PEM -x509 -sha256 -newkey rsa:4096 -keyout device-key.pem -out device-cert.pem -days 30 -extensions usr_cert -addext extendedKeyUsage=clientAuth -subj "//CN=my-x509-device"

    Important

    The extra forward slash given for the subject name (//CN=my-x509-device) is only required to escape the string with Git on Windows platforms.

  3. When asked to Enter PEM pass phrase:, use the pass phrase 1234.

  4. When asked Verifying - Enter PEM pass phrase:, use the pass phrase 1234 again.

    A public key certificate file (device-cert.pem) and private key file (device-key.pem) should now be generated in the directory where you ran the openssl command.

    The certificate file has its subject common name (CN) set to my-x509-device. For X.509-based enrollments, the Registration ID is set to the common name. The registration ID is a case-insensitive string of alphanumeric characters plus the special characters: '-', '.', '_', ':'. The last character must be alphanumeric or dash ('-'). The common name must adhere to this format. DPS supports registration IDs up to 128 characters long; however, the maximum length of the subject common name in an X.509 certificate is 64 characters. The registration ID, therefore, is limited to 64 characters when using X.509 certificates.

  5. The certificate file is Base 64 encoded. To view the subject common name (CN) and other properties of the certificate file, enter the following command:

    winpty openssl x509 -in device-cert.pem -text -noout

    Certificate:
Data:
    Version: 3 (0x2)
    Serial Number:
        77:3e:1d:e4:7e:c8:40:14:08:c6:09:75:50:9c:1a:35:6e:19:52:e2
    Signature Algorithm: sha256WithRSAEncryption
    Issuer: CN = my-x509-device
    Validity
        Not Before: May  5 21:41:42 2022 GMT
        Not After : Jun  4 21:41:42 2022 GMT
    Subject: CN = my-x509-device
    Subject Public Key Info:
        Public Key Algorithm: rsaEncryption
            RSA Public-Key: (4096 bit)
            Modulus:
                00:d2:94:37:d6:1b:f7:43:b4:21:c6:08:1a:d6:d7:
                e6:40:44:4e:4d:24:41:6c:3e:8c:b2:2c:b0:23:29:
                ...
                23:6e:58:76:45:18:03:dc:2e:9d:3f:ac:a3:5c:1f:
                9f:66:b0:05:d5:1c:fe:69:de:a9:09:13:28:c6:85:
                0e:cd:53
            Exponent: 65537 (0x10001)
    X509v3 extensions:
        X509v3 Basic Constraints:
            CA:FALSE
        Netscape Comment:
            OpenSSL Generated Certificate
        X509v3 Subject Key Identifier:
            63:C0:B5:93:BF:29:F8:57:F8:F9:26:44:70:6F:9B:A4:C7:E3:75:18
        X509v3 Authority Key Identifier:
            keyid:63:C0:B5:93:BF:29:F8:57:F8:F9:26:44:70:6F:9B:A4:C7:E3:75:18

        X509v3 Extended Key Usage:
            TLS Web Client Authentication
Signature Algorithm: sha256WithRSAEncryption
     82:8a:98:f8:47:00:85:be:21:15:64:b9:22:b0:13:cc:9e:9a:
     ed:f5:93:b9:4b:57:0f:79:85:9d:89:47:69:95:65:5e:b3:b1:
     ...
     cc:b2:20:9a:b7:f2:5e:6b:81:a1:04:93:e9:2b:92:62:e0:1c:
     ac:d2:49:b9:36:d2:b0:21

  1. The sample code requires a private key that isn't encrypted. Run the following command to create an unencrypted private key:

    winpty openssl rsa -in device-key.pem -out unencrypted-device-key.pem

  2. When asked to Enter pass phrase for device-key.pem:, use the same pass phrase you did previously, 1234.

Keep the Git Bash prompt open. You need it later in this quickstart.

The C# sample code is set up to use X.509 certificates that are stored in a password-protected PKCS#12 formatted file (certificate.pfx). You still need the PEM formatted public key certificate file (device-cert.pem) that you just created to create an individual enrollment entry later in this quickstart.

  1. To generate the PKCS12 formatted file expected by the sample, enter the following command:

    winpty openssl pkcs12 -inkey device-key.pem -in device-cert.pem -export -out certificate.pfx

  2. When asked to Enter pass phrase for device-key.pem:, use the same pass phrase you did previously, 1234.

  3. When asked to Enter Export Password:, use the password 1234.

  4. When asked Verifying - Enter Export Password:, use the password 1234 again.

    A PKCS12 formatted certificate file (certificate.pfx) should now be generated in the directory where you ran the openssl command.

  5. Copy the PKCS12 formatted certificate file to the project directory for the X.509 device provisioning sample. The path given is relative to the location where you downloaded the sample repo.

    cp certificate.pfx ./azure-iot-sdk-csharp/provisioning/device/samples/"Getting Started"/X509Sample

You don't need the Git Bash prompt for the rest of this quickstart. However, you might want to keep it open to check your certificate if you have problems in later steps.

  1. The sample code requires a private key that isn't encrypted. Run the following command to create an unencrypted private key:

    winpty openssl rsa -in device-key.pem -out unencrypted-device-key.pem

  2. When asked to Enter pass phrase for device-key.pem:, use the same pass phrase you did previously, 1234.

  3. Copy the device certificate and unencrypted private key to the project directory for the X.509 device provisioning sample. The path given is relative to the location where you downloaded the SDK.

    cp device-cert.pem ./azure-iot-sdk-node/provisioning/device/samples
cp unencrypted-device-key.pem ./azure-iot-sdk-node/provisioning/device/samples

You don't need the Git Bash prompt for the rest of this quickstart. However, you might want to keep it open to check your certificate if you have problems in later steps.

  1. Copy the device certificate and private key to the project directory for the X.509 device provisioning sample. The path given is relative to the location where you downloaded the SDK.

    cp device-cert.pem ./azure-iot-sdk-python/samples/async-hub-scenarios
cp device-key.pem ./azure-iot-sdk-python/samples/async-hub-scenarios

You don't need the Git Bash prompt for the rest of this quickstart. However, you might want to keep it open to check your certificate if you have problems in later steps.

  1. The Java sample code requires a private key that isn't encrypted. Run the following command to create an unencrypted private key:

    winpty openssl pkey -in device-key.pem -out unencrypted-device-key.pem

  2. When asked to Enter pass phrase for device-key.pem:, use the same pass phrase you did previously, 1234.

Keep the Git Bash prompt open. You need it later in this quickstart.

Create a device enrollment

The Azure IoT Device Provisioning Service supports two types of enrollments:

This article demonstrates an individual enrollment for a single device to be provisioned with an IoT hub.

  1. Sign in to the Azure portal and navigate to your Device Provisioning Service instance.

  2. Select Manage enrollments from the Settings section of the navigation menu.

  3. Select the Individual enrollments tab, then select Add individual enrollment.

    Screenshot that shows the add individual enrollment option.

  4. On the Registration + provisioning of the Add enrollment page, provide the following information to configure the enrollment details:

    Field Description
    Attestation Select X.509 client certificates as the Attestation mechanism.
    X.509 certificate settings Upload one or two certificates that will be used to verify the device for this enrollment.
    Provisioning status Check the Enable this enrollment box if you want this enrollment to be available to provision its device. Uncheck this box if you want the enrollment to be disabled. You can change this setting later.
    Reprovision policy Choose a reprovision policy that reflects how you want DPS to handle devices that request reprovisioning. For more information, see Reprovision policies.

  5. Select Next: IoT hubs.

  6. On the IoT hubs tab of the Add enrollment page, provide the following information to determine which IoT hubs the enrollment can provision devices to:

    Field Description
    Target IoT hubs Select one or more of your linked IoT hubs, or add a new link to an IoT hub. To learn more about linking IoT hubs to your DPS instance, see How to link and manage IoT hubs.
    Allocation policy If you selected more than one linked IoT hub, select how you want to assign devices to the different hubs. To learn more about allocation policies, see How to use allocation policies.

    If you selected only one linked IoT hub, we recommend using the Evenly weighted distribution policy.

  7. Select Next: Device settings

  8. On the Device settings tab of the Add enrollment page, provide the following information to define how newly provisioned devices will be configured:

    Field Description
    Device ID Provide a device ID that will be assigned to the provisioned device in IoT Hub. If you don't provide a device ID, the registration ID will be used.
    IoT Edge Check the Enable IoT Edge on provisioned devices if the provisioned device will run Azure IoT Edge. Uncheck this box if this enrollment is for a non-IoT Edge-enabled device.
    Device tags Use this text box to provide any tags that you want to apply to the device twin of the provisioned device.
    Desired properties Use this text box to provide any desired properties that you want to apply to the device twin of the provisioned device.

    For more information, see Understand and use device twins in IoT Hub.

  9. Select Next: Review + create.

  10. On the Review + create tab, verify all of your values then select Create.

Prepare and run the device provisioning code

In this section, you update the sample code to send the device's boot sequence to your Device Provisioning Service instance. This boot sequence causes the device to be recognized and assigned to an IoT hub linked to the DPS instance.

In this section, you use your Git Bash prompt and the Visual Studio IDE.

Configure the provisioning device code

In this section, you update the sample code with your Device Provisioning Service instance information.

  1. In the Azure portal, select the Overview tab for your Device Provisioning Service.

  2. Copy the ID Scope value.

    Screenshot of the ID scope on Azure portal.

  3. Launch Visual Studio and open the new solution file that was created in the cmake directory you created in the root of the azure-iot-sdk-c git repository. The solution file is named azure_iot_sdks.sln.

  4. In Solution Explorer for Visual Studio, navigate to Provision_Samples > prov_dev_client_sample > Source Files and open prov_dev_client_sample.c.

  5. Find the id_scope constant, and replace the value with your ID Scope value that you copied in step 2.

    static const char* id_scope = "0ne00000A0A";

  6. Find the definition for the main() function in the same file. Make sure the hsm_type variable is set to SECURE_DEVICE_TYPE_X509.

    SECURE_DEVICE_TYPE hsm_type;
//hsm_type = SECURE_DEVICE_TYPE_TPM;
hsm_type = SECURE_DEVICE_TYPE_X509;
//hsm_type = SECURE_DEVICE_TYPE_SYMMETRIC_KEY;

  7. Save your changes.

  8. Right-click the prov_dev_client_sample project and select Set as Startup Project.

Configure the custom HSM stub code

The specifics of interacting with actual secure hardware-based storage vary depending on the hardware. As a result, the certificate and private key used by the simulated device in this quickstart is hardcoded in the custom Hardware Security Module (HSM) stub code.

To update the custom HSM stub code to simulate the identity of the device with ID my-x509-device:

  1. In Solution Explorer for Visual Studio, navigate to Provision_Samples > custom_hsm_example > Source Files and open custom_hsm_example.c.

  2. Update the string value of the COMMON_NAME string constant using the common name you used when generating the device certificate, my-x509-device.

    static const char* const COMMON_NAME = "my-x509-device";

  3. Update the string value of the CERTIFICATE constant string using the device certificate, device-cert.pem, that you generated previously.

    The syntax of certificate text in the sample must follow the following pattern with no extra spaces or parsing done by Visual Studio.

    static const char* const CERTIFICATE = "-----BEGIN CERTIFICATE-----\n"
"MIIFOjCCAyKgAwIBAgIJAPzMa6s7mj7+MA0GCSqGSIb3DQEBCwUAMCoxKDAmBgNV\n"
    ...
"MDMwWhcNMjAxMTIyMjEzMDMwWjAqMSgwJgYDVQQDDB9BenVyZSBJb1QgSHViIENB\n"
"-----END CERTIFICATE-----";

    Updating this string value manually can be prone to error. To generate the proper syntax, you can copy and paste the following command into your Git Bash prompt, and press ENTER. This command generates the syntax for the CERTIFICATE string constant value and writes it to the output.

    sed -e 's/^/"/;$ !s/$/""\\n"/;$ s/$/"/' device-cert.pem

    Copy and paste the output certificate text for the constant value.

  4. Update the string value of the PRIVATE_KEY constant with the unencrypted private key for your device certificate, unencrypted-device-key.pem.

    The syntax of the private key text must follow the following pattern with no extra spaces or parsing done by Visual Studio.

    static const char* const PRIVATE_KEY = "-----BEGIN RSA PRIVATE KEY-----\n"
"MIIJJwIBAAKCAgEAtjvKQjIhp0EE1PoADL1rfF/W6v4vlAzOSifKSQsaPeebqg8U\n"
    ...
"X7fi9OZ26QpnkS5QjjPTYI/wwn0J9YAwNfKSlNeXTJDfJ+KpjXBcvaLxeBQbQhij\n"
"-----END RSA PRIVATE KEY-----";

    Updating this string value manually can be prone to error. To generate the proper syntax, you can copy and paste the following command into your Git Bash prompt, and press ENTER. This command generates the syntax for the PRIVATE_KEY string constant value and writes it to the output.

    sed -e 's/^/"/;$ !s/$/""\\n"/;$ s/$/"/' unencrypted-device-key.pem

    Copy and paste the output private key text for the constant value.

  5. Save your changes.

  6. Right-click the custom_hsm_-_example project and select Build.

    Important

    You must build the custom_hsm_example project before you build the rest of the solution in the next section.

Run the sample

  1. On the Visual Studio menu, select Debug > Start without debugging to run the solution. If you're prompted to rebuild the project, select Yes to rebuild the project before running.

    The following output is an example of the simulated device my-x509-device successfully booting up, and connecting to the provisioning service. The device is assigned to an IoT hub and registered:

    Provisioning API Version: 1.8.0

Registering Device

Provisioning Status: PROV_DEVICE_REG_STATUS_CONNECTED
Provisioning Status: PROV_DEVICE_REG_STATUS_ASSIGNING

Registration Information received from service: contoso-iot-hub-2.azure-devices.net, deviceId: my-x509-device
Press enter key to exit:

In this section, you use your Windows command prompt.

  1. In the Azure portal, select the Overview tab for your Device Provisioning Service.

  2. Copy the ID Scope value.

    Screenshot of the ID scope on Azure portal.

  3. In your Windows command prompt, change to the X509Sample directory. This directory is located in the .\azure-iot-sdk-csharp\provisioning\device\samples\getting started\X509Sample directory off the directory where you cloned the samples on your computer.

  4. Enter the following command to build and run the X.509 device provisioning sample (replace the <IDScope> value with the ID Scope that you copied in the previous section. The certificate file defaults to ./certificate.pfx and prompts for the .pfx password.

    dotnet run -- -s <IDScope>

    If you want to pass the certificate and password as a parameter, you can use the following format.

    Note

    Additional parameters can be passed along while running the application to change the TransportType (-t) and the GlobalDeviceEndpoint (-g).

    dotnet run -- -s 0ne00000A0A -c certificate.pfx -p 1234

  5. The device connects to DPS and is assigned to an IoT hub. Then, the device sends a message to the IoT hub.

    Loading the certificate...
Enter the PFX password for certificate.pfx:
****
Found certificate: A33DB11B8883DEE5B1690ACFEAAB69E8E928080B CN=my-x509-device; PrivateKey: True
Using certificate A33DB11B8883DEE5B1690ACFEAAB69E8E928080B CN=my-x509-device
Initializing the device provisioning client...
Initialized for registration Id my-x509-device.
Registering with the device provisioning service...
Registration status: Assigned.
Device my-x509-device registered to MyExampleHub.azure-devices.net.
Creating X509 authentication for IoT Hub...
Testing the provisioned device with IoT Hub...
Sending a telemetry message...
Finished.

In this section, you use your Windows command prompt.

  1. In the Azure portal, select the Overview tab for your Device Provisioning Service.

  2. Copy the ID Scope value.

    Screenshot of the ID scope on Azure portal.

  3. In your Windows command prompt, go to the sample directory, and install the packages needed by the sample. The path shown is relative to the location where you cloned the SDK.

    cd .\azure-iot-sdk-node\provisioning\device\samples
npm install

    The sample uses five environment variables to authenticate and provision an IoT device using DPS. These environment variables are:

    Variable name Description
    PROVISIONING_HOST The endpoint to use for connecting to your DPS instance. For this quickstart, use the global endpoint, global.azure-devices-provisioning.net.
    PROVISIONING_IDSCOPE The ID Scope for your DPS instance.
    PROVISIONING_REGISTRATION_ID The registration ID for your device. It must match the subject common name in the device certificate.
    CERTIFICATE_FILE The path to your device certificate file.
    KEY_FILE The path to your device private key file.

  4. Add environment variables for the global device endpoint and ID scope. Replace <id-scope> with the value you copied in step 2.

    set PROVISIONING_HOST=global.azure-devices-provisioning.net
set PROVISIONING_IDSCOPE=<id-scope>

  5. Set the environment variable for the device registration ID. The registration ID for the IoT device must match subject common name on its device certificate. If you followed the steps in this quickstart to generate a self-signed test certificate, my-x509-device is both the subject name and the registration ID for the device.

    set PROVISIONING_REGISTRATION_ID=my-x509-device

  6. Set the environment variables for the device certificate and (unencrypted) device private key files.

    set CERTIFICATE_FILE=.\device-cert.pem
set KEY_FILE=.\unencrypted-device-key.pem

  7. Run the sample and verify that the device was provisioned successfully.

    node register_x509.js

    You should see output similar to the following example:

    registration succeeded
assigned hub=contoso-hub-2.azure-devices.net
deviceId=my-x509-device
Client connected
send status: MessageEnqueued

In this section, you use your Windows command prompt.

  1. In the Azure portal, select the Overview tab for your Device Provisioning Service.

  2. Copy the ID Scope and Global device endpoint values.

    Screenshot of the ID scope and global device endpoint on Azure portal.

  3. In your Windows command prompt, go to the directory of the provision_x509.py sample. The path shown is relative to the location where you cloned the SDK.

    cd ./azure-iot-sdk-python/samples/async-hub-scenarios

    This sample uses six environment variables to authenticate and provision an IoT device using DPS. These environment variables are:

    Variable name Description
    PROVISIONING_HOST The global endpoint used for connecting to your DPS instance.
    PROVISIONING_IDSCOPE The ID Scope for your DPS instance.
    DPS_X509_REGISTRATION_ID The registration ID for your device. It must also match the subject name on the device certificate.
    X509_CERT_FILE The path to your device certificate file.
    X509_KEY_FILE The path to your device certificate private key file.
    PASS_PHRASE The pass phrase you used to encrypt the certificate and private key file (1234).

  4. Add the environment variables for the global device endpoint and ID Scope.

    set PROVISIONING_HOST=global.azure-devices-provisioning.net
set PROVISIONING_IDSCOPE=<ID scope for your DPS resource>

  5. Set the environment variable for the registration ID. The registration ID for the IoT device must match subject name on its device certificate. If you followed the steps in this quickstart to generate a self-signed test certificate, my-x509-device is both the subject name and the registration ID for the device.

    set DPS_X509_REGISTRATION_ID=my-x509-device

  6. Set the environment variables for the certificate file, private key file, and pass phrase.

    set X509_CERT_FILE=./device-cert.pem
set X509_KEY_FILE=./device-key.pem
set PASS_PHRASE=1234

  7. Review the code for provision_x509.py. If you're not using Python version 3.7 or later, make the code change mentioned here to replace asyncio.run(main()) and save your changes.

  8. Run the sample. The sample connects to DPS, which provisions the device to an IoT hub. After the device is provisioned, the sample sends some test messages to the IoT hub.

    $ python azure-iot-sdk-python/samples/async-hub-scenarios/provision_x509.py
RegistrationStage(RequestAndResponseOperation): Op will transition into polling after interval 2.  Setting timer.
The complete registration result is
my-x509-device
TestHub12345.azure-devices.net
initialAssignment
null
Will send telemetry from the provisioned device
sending message #4
sending message #7
sending message #2
sending message #8
sending message #5
sending message #9
sending message #1
sending message #6
sending message #10
sending message #3
done sending message #4
done sending message #7
done sending message #2
done sending message #8
done sending message #5
done sending message #9
done sending message #1
done sending message #6
done sending message #10
done sending message #3

In this section, you use both your Windows command prompt and your Git Bash prompt.

  1. In the Azure portal, select the Overview tab for your Device Provisioning Service.

  2. Copy the ID Scope and Global device endpoint values.

    Screenshot of the ID scope and global device endpoint on Azure portal.

  3. In your Windows command prompt, navigate to the sample project folder. The path shown is relative to the location where you cloned the SDK

    cd .\azure-iot-sdk-java\provisioning\provisioning-device-client-samples\provisioning-X509-sample

  4. Enter the provisioning service and X.509 identity information in the sample code. This information is used during provisioning, for attestation of the simulated device, prior to device registration.

    1. Open the file .\src\main\java\samples\com\microsoft\azure\sdk\iot\ProvisioningX509Sample.java in your favorite editor.

    2. Update the following values with the ID Scope and Provisioning Service Global Endpoint that you copied previously.

      private static final String idScope = "[Your ID scope here]";
private static final String globalEndpoint = "[Your Provisioning Service Global Endpoint here]";
private static final ProvisioningDeviceClientTransportProtocol PROVISIONING_DEVICE_CLIENT_TRANSPORT_PROTOCOL = ProvisioningDeviceClientTransportProtocol.HTTPS;

    3. Update the value of the leafPublicPem constant string with the value of your certificate, device-cert.pem.

      The syntax of certificate text must follow the following pattern with no extra spaces or characters.

      private static final String leafPublicPem = "-----BEGIN CERTIFICATE-----\n" +
"MIIFOjCCAyKgAwIBAgIJAPzMa6s7mj7+MA0GCSqGSIb3DQEBCwUAMCoxKDAmBgNV\n" +
    ...
"MDMwWhcNMjAxMTIyMjEzMDMwWjAqMSgwJgYDVQQDDB9BenVyZSBJb1QgSHViIENB\n" +
"-----END CERTIFICATE-----";

      Updating this string value manually can be prone to error. To generate the proper syntax, you can copy and paste the following command into your Git Bash prompt, and press ENTER. This command generates the syntax for the leafPublicPem string constant value and writes it to the output.

      sed 's/^/"/;$ !s/$/\\n" +/;$ s/$/"/' device-cert.pem

      Copy and paste the output certificate text for the constant value.

    4. Update the string value of the leafPrivateKey constant with the unencrypted private key for your device certificate, unencrypted-device-key.pem.

      The syntax of the private key text must follow the following pattern with no extra spaces or characters.

      private static final String leafPrivateKey = "-----BEGIN PRIVATE KEY-----\n" +
"MIIJJwIBAAKCAgEAtjvKQjIhp0EE1PoADL1rfF/W6v4vlAzOSifKSQsaPeebqg8U\n" +
    ...
"X7fi9OZ26QpnkS5QjjPTYI/wwn0J9YAwNfKSlNeXTJDfJ+KpjXBcvaLxeBQbQhij\n" +
"-----END PRIVATE KEY-----";

      Updating this string value manually can be prone to error. To generate the proper syntax, you can copy and paste the following command into your Git Bash prompt, and press ENTER. This command generates the syntax for the leafPrivateKey string constant value and writes it to the output.

      sed 's/^/"/;$ !s/$/\\n" +/;$ s/$/"/' unencrypted-device-key.pem

      Copy and paste the output private key text for the constant value.

    5. Save your changes.

  5. Build the sample, and then go to the target folder.

    mvn clean install
cd target

  6. The build outputs .jar file in the target folder with the following file format: provisioning-x509-sample-{version}-with-deps.jar; for example: provisioning-x509-sample-1.8.1-with-deps.jar. Execute the .jar file. You might need to replace the version in the following command.

    java -jar ./provisioning-x509-sample-1.8.1-with-deps.jar

    The sample connects to DPS, which provisions the device to an IoT hub. After the device is provisioned, the sample sends some test messages to the IoT hub.

    Starting...
Beginning setup.
WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
2022-05-11 09:42:05,025 DEBUG (main) [com.microsoft.azure.sdk.iot.provisioning.device.ProvisioningDeviceClient] - Initialized a ProvisioningDeviceClient instance using SDK version 2.0.0
2022-05-11 09:42:05,027 DEBUG (main) [com.microsoft.azure.sdk.iot.provisioning.device.ProvisioningDeviceClient] - Starting provisioning thread...
Waiting for Provisioning Service to register
2022-05-11 09:42:05,030 INFO (global.azure-devices-provisioning.net-6255a8ba-CxnPendingConnectionId-azure-iot-sdk-ProvisioningTask) [com.microsoft.azure.sdk.iot.provisioning.device.internal.task.ProvisioningTask] - Opening the connection to device provisioning service...
2022-05-11 09:42:05,252 INFO (global.azure-devices-provisioning.net-6255a8ba-Cxn6255a8ba-azure-iot-sdk-ProvisioningTask) [com.microsoft.azure.sdk.iot.provisioning.device.internal.task.ProvisioningTask] - Connection to device provisioning service opened successfully, sending initial device registration message
2022-05-11 09:42:05,286 INFO (global.azure-devices-provisioning.net-6255a8ba-Cxn6255a8ba-azure-iot-sdk-RegisterTask) [com.microsoft.azure.sdk.iot.provisioning.device.internal.task.RegisterTask] - Authenticating with device provisioning service using x509 certificates
2022-05-11 09:42:06,083 INFO (global.azure-devices-provisioning.net-6255a8ba-Cxn6255a8ba-azure-iot-sdk-ProvisioningTask) [com.microsoft.azure.sdk.iot.provisioning.device.internal.task.ProvisioningTask] - Waiting for device provisioning service to provision this device...
2022-05-11 09:42:06,083 INFO (global.azure-devices-provisioning.net-6255a8ba-Cxn6255a8ba-azure-iot-sdk-ProvisioningTask) [com.microsoft.azure.sdk.iot.provisioning.device.internal.task.ProvisioningTask] - Current provisioning status: ASSIGNING
Waiting for Provisioning Service to register
2022-05-11 09:42:15,685 INFO (global.azure-devices-provisioning.net-6255a8ba-Cxn6255a8ba-azure-iot-sdk-ProvisioningTask) [com.microsoft.azure.sdk.iot.provisioning.device.internal.task.ProvisioningTask] - Device provisioning service assigned the device successfully
IotHUb Uri : MyExampleHub.azure-devices.net
Device ID : java-device-01
2022-05-11 09:42:25,057 INFO (main) [com.microsoft.azure.sdk.iot.device.transport.ExponentialBackoffWithJitter] - NOTE: A new instance of ExponentialBackoffWithJitter has been created with the following properties. Retry Count: 2147483647, Min Backoff Interval: 100, Max Backoff Interval: 10000, Max Time Between Retries: 100, Fast Retry Enabled: true
2022-05-11 09:42:25,080 INFO (main) [com.microsoft.azure.sdk.iot.device.transport.ExponentialBackoffWithJitter] - NOTE: A new instance of ExponentialBackoffWithJitter has been created with the following properties. Retry Count: 2147483647, Min Backoff Interval: 100, Max Backoff Interval: 10000, Max Time Between Retries: 100, Fast Retry Enabled: true
2022-05-11 09:42:25,087 DEBUG (main) [com.microsoft.azure.sdk.iot.device.DeviceClient] - Initialized a DeviceClient instance using SDK version 2.0.3
2022-05-11 09:42:25,129 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection] - Opening MQTT connection...
2022-05-11 09:42:25,150 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.mqtt.Mqtt] - Sending MQTT CONNECT packet...
2022-05-11 09:42:25,982 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.mqtt.Mqtt] - Sent MQTT CONNECT packet was acknowledged
2022-05-11 09:42:25,983 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.mqtt.Mqtt] - Sending MQTT SUBSCRIBE packet for topic devices/java-device-01/messages/devicebound/#
2022-05-11 09:42:26,068 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.mqtt.Mqtt] - Sent MQTT SUBSCRIBE packet for topic devices/java-device-01/messages/devicebound/# was acknowledged
2022-05-11 09:42:26,068 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection] - MQTT connection opened successfully
2022-05-11 09:42:26,070 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - The connection to the IoT Hub has been established
2022-05-11 09:42:26,071 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - Updating transport status to new status CONNECTED with reason CONNECTION_OK
2022-05-11 09:42:26,071 DEBUG (main) [com.microsoft.azure.sdk.iot.device.DeviceIO] - Starting worker threads
2022-05-11 09:42:26,073 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - Invoking connection status callbacks with new status details
2022-05-11 09:42:26,074 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - Client connection opened successfully
2022-05-11 09:42:26,075 INFO (main) [com.microsoft.azure.sdk.iot.device.DeviceClient] - Device client opened successfully
Sending message from device to IoT Hub...
2022-05-11 09:42:26,077 DEBUG (main) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - Message was queued to be sent later ( Message details: Correlation Id [aaaa0000-bb11-2222-33cc-444444dddddd] Message Id [aaaa0000-bb11-2222-33cc-444444dddddd] )
Press any key to exit...
2022-05-11 09:42:26,079 DEBUG (MyExampleHub.azure-devices.net-java-device-01-ee6c362d-Cxn7a1fb819-e46d-4658-9b03-ca50c88c0440-azure-iot-sdk-IotHubSendTask) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - Sending message ( Message details: Correlation Id [aaaa0000-bb11-2222-33cc-444444dddddd] Message Id [aaaa0000-bb11-2222-33cc-444444dddddd] )
2022-05-11 09:42:26,422 DEBUG (MQTT Call: java-device-01) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - IotHub message was acknowledged. Checking if there is record of sending this message ( Message details: Correlation Id [aaaa0000-bb11-2222-33cc-444444dddddd] Message Id [aaaa0000-bb11-2222-33cc-444444dddddd] )
2022-05-11 09:42:26,425 DEBUG (MyExampleHub.azure-devices.net-java-device-01-ee6c362d-Cxn7a1fb819-e46d-4658-9b03-ca50c88c0440-azure-iot-sdk-IotHubSendTask) [com.microsoft.azure.sdk.iot.device.transport.IotHubTransport] - Invoking the callback function for sent message, IoT Hub responded to message ( Message details: Correlation Id [aaaa0000-bb11-2222-33cc-444444dddddd] Message Id [aaaa0000-bb11-2222-33cc-444444dddddd] ) with status OK
Message sent!

Confirm your device provisioning registration

To see which IoT hub your device was provisioned to, examine the registration details of the individual enrollment you created previously:

  1. In Azure portal, go to your Device Provisioning Service.

  2. In the Settings menu, select Manage enrollments.

  3. Select Individual Enrollments. The X.509 enrollment entry that you created previously, my-x509-device, should appear in the list.

  4. Select the enrollment entry. The IoT hub that your device was assigned to and its device ID appears under Registration status.

To verify the device in your IoT hub:

  1. In Azure portal, go to the IoT hub that your device was assigned to.

  2. In the Device management menu, select Devices.

  3. If your device was provisioned successfully, its device ID, my-x509-device, should appear in the list, with Status set as enabled. If you don't see your device, select Refresh.

    Screenshot that shows the device is registered with the IoT hub in Azure portal.

Important

If you changed the initial device twin state from the default value in the enrollment entry for your device, it can pull the desired twin state from the hub and act accordingly. For more information, see Understand and use device twins in IoT Hub

Clean up resources

If you plan to continue working on and exploring the device client sample, don't clean up the resources created in this quickstart. If you don't plan to continue, use the following steps to delete all resources created by this quickstart.

Delete your device enrollment

  1. Close the device client sample output window on your machine.

  2. From the left-hand menu in the Azure portal, select All resources.

  3. Select your Device Provisioning Service.

  4. In the Settings menu, select Manage enrollments.

  5. Select the Individual enrollments tab.

  6. Select the check box next to the registration ID of the device you enrolled in this quickstart.

  7. At the top of the page, select Delete.

Delete your device registration from IoT Hub

  1. From the left-hand menu in the Azure portal, select All resources.

  2. Select your IoT hub.

  3. In the Device management menu, select Devices.

  4. Select the check box next to the device ID of the device you registered in this quickstart.

  5. At the top of the page, select Delete.

Next steps

In this quickstart, you provisioned a single device to your IoT hub using an individual enrollment. Next, learn how to provision multiple devices across multiple hubs.

Tutorial: Manage IoT hub assignment with custom allocation policies