Package com.azure.identity

Class ClientAssertionCredentialBuilder

java.lang.Object
com.azure.identity.CredentialBuilderBase<T>
com.azure.identity.AadCredentialBuilderBase<ClientAssertionCredentialBuilder>
com.azure.identity.ClientAssertionCredentialBuilder
All Implemented Interfaces:
com.azure.core.client.traits.HttpTrait<ClientAssertionCredentialBuilder>
public class ClientAssertionCredentialBuilder extends AadCredentialBuilderBase<ClientAssertionCredentialBuilder>
Fluent credential builder for instantiating a ClientAssertionCredential.

The ClientAssertionCredential acquires a token via client assertion and service principal authentication. This authentication method provides a secure and scalable way for client applications to access Azure resources without the need for users to provide their credentials. It is often used in scenarios where a client application needs to access Azure resources on behalf of a user, such as in a multi-tier application architecture. In this authentication method, the client application creates a JSON Web Token (JWT) that includes information about the service principal (such as its client ID and tenant ID) and signs it using a client secret. The client then sends this token to Microsoft Entra ID as proof of its identity. Microsoft Entra ID verifies the token signature and checks that the service principal has the necessary permissions to access the requested Azure resource. If the token is valid and the service principal is authorized, Microsoft Entra ID issues an access token that the client application can use to access the requested resource. The ClientAssertionCredential acquires an access token with a client client assertion for a service principal/registered Microsoft Entra application. The tenantId, clientId and clientAssertion of the service principal are required for this credential to acquire an access token. It can be used both in Azure hosted and local development environments for authentication.

Sample: Construct a simple ClientAssertionCredential

The following code sample demonstrates the creation of a ClientAssertionCredential, using the ClientAssertionCredentialBuilder to configure it. The tenantId, clientId and certificate parameters are required to create ClientAssertionCredential. Once this credential is created, it may be passed into the builder of many of the Azure SDK for Java client builders as the 'credential' parameter.

 TokenCredential clientAssertionCredential = new ClientAssertionCredentialBuilder()
     .tenantId(tenantId)
     .clientId(clientId)
     .clientAssertion(() -> "<Client-Assertion>")
     .build();

Sample: Construct a ClientAssertionCredential behind a proxy

The following code sample demonstrates the creation of a ClientAssertionCredential, using the ClientAssertionCredentialBuilder to configure it. The tenantId, clientId and clientAssertion parameters are required to create ClientAssertionCredential. THe proxyOptions can be optionally configured to target a proxy. Once this credential is created, it may be passed into the builder of many of the Azure SDK for Java client builders as the 'credential' parameter.

 TokenCredential assertionCredential = new ClientAssertionCredentialBuilder()
     .tenantId(tenantId)
     .clientId(clientId)
     .clientAssertion(() -> "<Client-Assertion>")
     .proxyOptions(new ProxyOptions(Type.HTTP, new InetSocketAddress("10.21.32.43", 5465)))
     .build();
See Also:

  • Constructor Details

    • ClientAssertionCredentialBuilder

      public ClientAssertionCredentialBuilder()

  • Method Details

    • clientAssertion

      public ClientAssertionCredentialBuilder clientAssertion(Supplier<String> clientAssertionSupplier)
      Sets the supplier containing the logic to supply the client assertion when invoked.
      Parameters:
      clientAssertionSupplier - the supplier supplying client assertion.
      Returns:
      An updated instance of this builder.

    • tokenCachePersistenceOptions

      public ClientAssertionCredentialBuilder tokenCachePersistenceOptions(TokenCachePersistenceOptions tokenCachePersistenceOptions)
      Configures the persistent shared token cache options and enables the persistent token cache which is disabled by default. If configured, the credential will store tokens in a cache persisted to the machine, protected to the current user, which can be shared by other credentials and processes.
      Parameters:
      tokenCachePersistenceOptions - the token cache configuration options
      Returns:
      An updated instance of this builder with the token cache options configured.

    • build

      public ClientAssertionCredential build()
      Creates a new ClientAssertionCredential with the current configurations.
      Returns:
      a ClientAssertionCredential with the current configurations.
      Throws:
      IllegalArgumentException - if either of clientId, tenantId or clientAssertion is not present.