Azure Identity Java Agent Skill

Azure Identity library for Java authentication with Azure services. Use when implementing DefaultAzureCredential, managed identity, service principal, or any Azure authentication pattern in Java applications.

6k tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

151 d ago

last touched

this folder, not the whole repository

Install

one command, takes just this skill from the repository

npx skills add https://github.com/microsoft/skills --skill azure-identity-java

What comes with it

14 391 bytes besides the instruction

references/examples.md

The instruction itself

23 sections, as written by the author

Azure Identity library for Java

Authentication library for Azure SDK clients using Microsoft Entra ID.

Installation

<dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-identity</artifactId>
    <version>1.15.0</version>
</dependency>

Key Concepts

| Credential | Use Case |

|------------|----------|

| DefaultAzureCredential | Recommended - Works in dev and production |

| ManagedIdentityCredential | Azure-hosted apps (App Service, Functions, VMs) |

| EnvironmentCredential | CI/CD pipelines with env vars |

| ClientSecretCredential | Service principals with secret |

| ClientCertificateCredential | Service principals with certificate |

| AzureCliCredential | Local dev using az login |

| InteractiveBrowserCredential | Interactive login flow |

| DeviceCodeCredential | Headless device authentication |

DefaultAzureCredential (Recommended)

The DefaultAzureCredential tries multiple authentication methods in order. See DefaultAzureCredential overview for the current credential chain order and defaults.

import com.azure.identity.DefaultAzureCredential;
import com.azure.identity.DefaultAzureCredentialBuilder;

// Simple usage
DefaultAzureCredential credential = new DefaultAzureCredentialBuilder().build();

// Use with any Azure client
BlobServiceClient blobClient = new BlobServiceClientBuilder()
    .endpoint("https://<storage-account>.blob.core.windows.net")
    .credential(credential)
    .buildClient();

KeyClient keyClient = new KeyClientBuilder()
    .vaultUrl("https://<vault-name>.vault.azure.net")
    .credential(credential)
    .buildClient();

Configure DefaultAzureCredential

DefaultAzureCredential credential = new DefaultAzureCredentialBuilder()
    .managedIdentityClientId("<user-assigned-identity-client-id>")  // For user-assigned MI
    .tenantId("<tenant-id>")                                        // Limit to specific tenant
    .excludeEnvironmentCredential()                                 // Skip env vars
    .excludeAzureCliCredential()                                    // Skip Azure CLI
    .build();

Managed Identity

For Azure-hosted applications (App Service, Functions, AKS, VMs).

import com.azure.identity.ManagedIdentityCredential;
import com.azure.identity.ManagedIdentityCredentialBuilder;

// System-assigned managed identity
ManagedIdentityCredential credential = new ManagedIdentityCredentialBuilder()
    .build();

// User-assigned managed identity (by client ID)
ManagedIdentityCredential credential = new ManagedIdentityCredentialBuilder()
    .clientId("<user-assigned-client-id>")
    .build();

// User-assigned managed identity (by resource ID)
ManagedIdentityCredential credential = new ManagedIdentityCredentialBuilder()
    .resourceId("/subscriptions/<sub>/resourceGroups/<rg>/providers/Microsoft.ManagedIdentity/userAssignedIdentities/<name>")
    .build();

Service Principal with Secret

import com.azure.identity.ClientSecretCredential;
import com.azure.identity.ClientSecretCredentialBuilder;

ClientSecretCredential credential = new ClientSecretCredentialBuilder()
    .tenantId("<tenant-id>")
    .clientId("<client-id>")
    .clientSecret("<client-secret>")
    .build();

Service Principal with Certificate

import com.azure.identity.ClientCertificateCredential;
import com.azure.identity.ClientCertificateCredentialBuilder;

// From PEM file
ClientCertificateCredential credential = new ClientCertificateCredentialBuilder()
    .tenantId("<tenant-id>")
    .clientId("<client-id>")
    .pemCertificate("<path-to-cert.pem>")
    .build();

// From PFX file with password
ClientCertificateCredential credential = new ClientCertificateCredentialBuilder()
    .tenantId("<tenant-id>")
    .clientId("<client-id>")
    .pfxCertificate("<path-to-cert.pfx>", "<pfx-password>")
    .build();

// Send certificate chain for SNI
ClientCertificateCredential credential = new ClientCertificateCredentialBuilder()
    .tenantId("<tenant-id>")
    .clientId("<client-id>")
    .pemCertificate("<path-to-cert.pem>")
    .sendCertificateChain(true)
    .build();

Environment Credential

Reads credentials from environment variables.

import com.azure.identity.EnvironmentCredential;
import com.azure.identity.EnvironmentCredentialBuilder;

EnvironmentCredential credential = new EnvironmentCredentialBuilder().build();

Required Environment Variables

For service principal with secret:

AZURE_TENANT_ID=<tenant-id>
AZURE_CLIENT_ID=<client-id>
AZURE_CLIENT_SECRET=<client-secret>

For service principal with certificate:

AZURE_TENANT_ID=<tenant-id>
AZURE_CLIENT_ID=<client-id>
AZURE_CLIENT_CERTIFICATE_PATH=/path/to/cert.pem
AZURE_CLIENT_CERTIFICATE_PASSWORD=<optional-password>

Azure CLI Credential

For local development using az login.

import com.azure.identity.AzureCliCredential;
import com.azure.identity.AzureCliCredentialBuilder;

AzureCliCredential credential = new AzureCliCredentialBuilder()
    .tenantId("<tenant-id>")  // Optional: specific tenant
    .build();

Interactive Browser

For desktop applications requiring user login.

import com.azure.identity.InteractiveBrowserCredential;
import com.azure.identity.InteractiveBrowserCredentialBuilder;

InteractiveBrowserCredential credential = new InteractiveBrowserCredentialBuilder()
    .clientId("<client-id>")
    .redirectUrl("http://localhost:8080")  // Must match app registration
    .build();

Device Code

For headless devices (IoT, CLI tools).

import com.azure.identity.DeviceCodeCredential;
import com.azure.identity.DeviceCodeCredentialBuilder;

DeviceCodeCredential credential = new DeviceCodeCredentialBuilder()
    .clientId("<client-id>")
    .challengeConsumer(challenge -> {
        // Display to user
        System.out.println(challenge.getMessage());
    })
    .build();

Chained Credential

Create custom authentication chains.

import com.azure.identity.ChainedTokenCredential;
import com.azure.identity.ChainedTokenCredentialBuilder;

ChainedTokenCredential credential = new ChainedTokenCredentialBuilder()
    .addFirst(new ManagedIdentityCredentialBuilder().build())
    .addLast(new AzureCliCredentialBuilder().build())
    .build();

Workload Identity (AKS)

For Azure Kubernetes Service with workload identity.

import com.azure.identity.WorkloadIdentityCredential;
import com.azure.identity.WorkloadIdentityCredentialBuilder;

// Reads from AZURE_TENANT_ID, AZURE_CLIENT_ID, AZURE_FEDERATED_TOKEN_FILE
WorkloadIdentityCredential credential = new WorkloadIdentityCredentialBuilder().build();

// Or explicit configuration
WorkloadIdentityCredential credential = new WorkloadIdentityCredentialBuilder()
    .tenantId("<tenant-id>")
    .clientId("<client-id>")
    .tokenFilePath("/var/run/secrets/azure/tokens/azure-identity-token")
    .build();

Token Caching

Enable persistent token caching for better performance.

// Enable token caching (in-memory by default)
DefaultAzureCredential credential = new DefaultAzureCredentialBuilder()
    .enableAccountIdentifierLogging()
    .build();

// With shared token cache (for multi-credential scenarios)
SharedTokenCacheCredential credential = new SharedTokenCacheCredentialBuilder()
    .clientId("<client-id>")
    .build();

Sovereign Clouds

import com.azure.identity.AzureAuthorityHosts;

// Azure Government
DefaultAzureCredential govCredential = new DefaultAzureCredentialBuilder()
    .authorityHost(AzureAuthorityHosts.AZURE_GOVERNMENT)
    .build();

// Azure China
DefaultAzureCredential chinaCredential = new DefaultAzureCredentialBuilder()
    .authorityHost(AzureAuthorityHosts.AZURE_CHINA)
    .build();

Error Handling

import com.azure.identity.CredentialUnavailableException;
import com.azure.core.exception.ClientAuthenticationException;

try {
    DefaultAzureCredential credential = new DefaultAzureCredentialBuilder().build();
    AccessToken token = credential.getToken(new TokenRequestContext()
        .addScopes("https://management.azure.com/.default"));
} catch (CredentialUnavailableException e) {
    // No credential could authenticate
    System.out.println("Authentication failed: " + e.getMessage());
} catch (ClientAuthenticationException e) {
    // Authentication error (wrong credentials, expired, etc.)
    System.out.println("Auth error: " + e.getMessage());
}

Logging

Enable authentication logging for debugging.

// Via environment variable
// AZURE_LOG_LEVEL=verbose

// Or programmatically
DefaultAzureCredential credential = new DefaultAzureCredentialBuilder()
    .enableAccountIdentifierLogging()  // Log account info
    .build();

Environment Variables

# DefaultAzureCredential configuration
AZURE_TENANT_ID=<tenant-id>
AZURE_CLIENT_ID=<client-id>
AZURE_CLIENT_SECRET=<client-secret>

# Managed Identity
AZURE_CLIENT_ID=<user-assigned-mi-client-id>

# Workload Identity (AKS)
AZURE_FEDERATED_TOKEN_FILE=/var/run/secrets/azure/tokens/azure-identity-token

# Logging
AZURE_LOG_LEVEL=verbose

# Authority host
AZURE_AUTHORITY_HOST=https://login.microsoftonline.com/

Best Practices

Use DefaultAzureCredential - Works seamlessly from dev to production
Managed Identity in Production - No secrets to manage, automatic rotation
Azure CLI for Local Dev - Run az login before running your app
Least Privilege - Grant only required permissions to service principals
Token Caching - Enabled by default, reduces auth round-trips
Environment Variables - Use for CI/CD, not hardcoded secrets

Credential Selection Matrix

| Environment | Recommended Credential |

|-------------|----------------------|

| Local Development | DefaultAzureCredential (uses Azure CLI) |

| Azure App Service | DefaultAzureCredential (uses Managed Identity) |

| Azure Functions | DefaultAzureCredential (uses Managed Identity) |

| Azure Kubernetes Service | WorkloadIdentityCredential |

| Azure VMs | DefaultAzureCredential (uses Managed Identity) |

| CI/CD Pipeline | EnvironmentCredential |

| Desktop App | InteractiveBrowserCredential |

| CLI Tool | DeviceCodeCredential |

Trigger Phrases

"Azure authentication Java", "DefaultAzureCredential Java"
"managed identity Java", "service principal Java"
"Azure login Java", "Azure credentials Java"
"AZURE_CLIENT_ID", "AZURE_TENANT_ID"

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How to use it

Copy the folder

Take microsoft/azure-identity-java from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

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