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Flavio Campelo
Flavio Campelo

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Azure - Adding custom claims to token

#extension #custom #claim #token
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Adding custom claims to token

You can add custom claims to token. Here we'll show you how you can do that.

First Method

On Token configuration, add all optional claim you need.

Image 3

Set acceptMappedClaims to true in the application registration manifest in Azure.

Image 4

Original claims

{
    "aud": "xxxxxx-xxxxxx",
    "iss": "https://login.microsoftonline.com/xxxxxx-xxxxxx/v2.0",
    "iat": 1651237210,
    "nbf": 1651237210,
    "exp": 1651241110,
    "name": "Carlos Trump",
    "nonce": "xxxxxx-xxxxxx",
    "oid": "xxxxxx-xxxxxx",
    "preferred_username": "Carlos@xxxxxx.onmicrosoft.com",
    "rh": "0.AXYAqOdw6jRZRkSWfP72hzb6eT8SDlNWZqdPqMc67VBLYYiZAB4.",
    "sub": "zuB5I9MCoF1qr-crecx909wvV5P9YActkklSSJD8AV4",
    "tid": "xxxxxx-xxxxxx",
    "uti": "fzv0cbl8Skai4_NzlvlpAA",
    "ver": "2.0"
}
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With some basic attributes

{
    "aud": "xxxxxx-xxxxxx",
    "iss": "https://login.microsoftonline.com/xxxxxx-xxxxxx/v2.0",
    "iat": 1651258028,
    "nbf": 1651258028,
    "exp": 1651261928,
    "aio": "ATQAy/8TAAAAk4vHaYNEYYdk9mGabVnZU3k7irtTt8kN9nSCwi33t2WnUZQ+wfVqhmfagvrEDaFl",
    "name": "Carlos Trump",
    "nonce": "xxxxxx-xxxxxx",
    "oid": "xxxxxx-xxxxxx",
    "preferred_username": "Carlos@xxxxxx.onmicrosoft.com",
    "rh": "0.AXYAqOdw6jRZRkSWfP72hzb6eQ2WycEzZuJOvIt24Do6O26ZAB4.",
    "sub": "HZpJ82-w-xbNiIIZO4rbPyMLwespkL6vImL3tjtjWfQ",
    "tid": "xxxxxx-xxxxxx",
    "uti": "ei9kLnvfnUW37Vn--2SUAA",
    "ver": "2.0",
    "country": "CA"
}
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Country is a tenant information that is shown here.

With extension attributes

{
    "aud": "xxxxxx-xxxxxx",
    "iss": "https://login.microsoftonline.com/xxxxxx-xxxxxx/v2.0",
    "iat": 1651264242,
    "nbf": 1651264242,
    "exp": 1651268142,
    "aio": "ATQAy/8TAAAAewvv7oKplIyMzAwyQB1cJQtJ5AxLPwkQqAtvthJuBannRHsbRqiqXPpIWalURrbA",
    "extn.testString": [
        "my string value"
    ],
    "name": "Carlos Trump",
    "nonce": "xxxxxx-xxxxxx",
    "oid": "xxxxxx-xxxxxx",
    "preferred_username": "Carlos@xxxxxx.onmicrosoft.com",
    "rh": "0.AXYAqOdw6jRZRkSWfP72hzb6eQ2WycEzZuJOvIt24Do6O26ZAB4.",
    "sub": "HZpJ82-w-xbNiIIZO4rbPyMLwespkL6vImL3tjtjWfQ",
    "tid": "xxxxxx-xxxxxx",
    "uti": "HX0mTfONKEKwFXRbx76SAA",
    "ver": "2.0"
}
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extn.testString is a new custom attribute that is now present among all retrieved information.

Second Method

Because AzureAD and AzureADPreview Module don't work with PowerShell v7.x, you should use powershell 5.

Verify your powershell version

$PSVersionTable
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Image 1

If you're not running 5.1 version, you should use this command

PowerShell -version 5.1
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Then confirm you're using the correct version

$PSVersionTable
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Image 2

IMPORTANT

You have to use AzureADPreview because AzureAD doesn't have several commands.

Install-Module AzureADPreview
Import-Module AzureADPreview
Connect-AzureAD -tenantId {TENANT_ID}
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Get-AzureADPolicy

New-AzureADPolicy -Definition @('{"ClaimsMappingPolicy":{"Version":1,"IncludeBasicClaimSet":"true", "ClaimsSchema": [{"Source":"user","ID":"employeeid","SamlClaimType":"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/employeeid","JwtClaimType":"employeeid"},{"Source":"company","ID":"tenantcountry","SamlClaimType":"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/country","JwtClaimType":"country"}]}}') -DisplayName "ExtraClaimsExample" -Type "ClaimsMappingPolicy"

# for extension attributes
New-AzureADPolicy -Definition @('{"ClaimsMappingPolicy":{"Version":1,"IncludeBasicClaimSet":"true", "ClaimsSchema": [{"Source":"user","ExtensionID":"extension_{CLIENT_ID}_testString","JwtClaimType":"extTestString"}]}}') -DisplayName "ExtraClaimsExample" -Type "ClaimsMappingPolicy"

Remove-AzureADPolicy -Id {POLICY_ID}
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IMPORTANT

  • For extension attributes, you have to use ExtensionID instead of ID
  • ExtensionID values are case sensitives.

Get Service Principal ObjectID

Get-AzureADServicePrincipal -SearchString {APP_REGISTRATION_NAME}
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Applying the policy to Service Principal

Add-AzureADServicePrincipalPolicy -Id {SERVICE_PRINCIPAL_OBJECT_ID} -RefObjectId {POLICY_ID}
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Adding new application key

New-AzureADApplicationKeyCredential -ObjectId {APPLICATION_OBJECT_ID} -CustomKeyIdentifier "Test" -StartDate "4/29/2022" -Type "Symmetric" -Usage "Sign" -Value "123"
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  • APPLICATION_OBJECT_ID => This value is available on App registrations overview's page.

Source

Typos or suggestions?

If you've found a typo, a sentence that could be improved or anything else that should be updated on this blog post, you can access it through a git repository and make a pull request. If you feel comfortable with github, instead of posting a comment, please go directly to https://github.com/campelo/documentation and open a new pull request with your changes.

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