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Alibaba Cloud Credentials for Java

Alibaba Cloud Credentials for Java is a tool for Java developers to manage credentials.

This document introduces how to obtain and use Credentials for Java.

Requirements

• The Alibaba Cloud Credentials for Java requires JDK 1.8 or later.

Installation

<dependency>
   <groupId>com.aliyun</groupId>
   <artifactId>credentials-java</artifactId>
   <version>Use the version shown in the maven badge</version>
</dependency>

Quick Examples

Before you begin, you need to sign up for an Alibaba Cloud account and retrieve your Credentials.

Credential Type

AccessKey

Setup access_key credential through User Information Management, it have full authority over the account, please keep it safe. Sometimes for security reasons, you cannot hand over a primary account AccessKey with full access to the developer of a project. You may create a sub-account RAM Sub-account , grant its authorization，and use the AccessKey of RAM Sub-account.

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception{
        Config config = new Config();
        // Which type of credential you want
        config.setType("access_key");
        // AccessKeyId of your account
        config.setAccessKeyId("AccessKeyId");
        // AccessKeySecret of your account
        config.setAccessKeySecret("AccessKeySecret");
        Client client = new Client(config);
    }
}

STS

Create a temporary security credential by applying Temporary Security Credentials (TSC) through the Security Token Service (STS).

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception{
        Config config = new Config();
        // Which type of credential you want
        config.setType("sts");
        // AccessKeyId of your account
        config.setAccessKeyId("AccessKeyId");
        // AccessKeySecret of your account
        config.setAccessKeySecret("AccessKeySecret");
        // Temporary Security Token
        config.setSecurityToken("SecurityToken");
        Client client = new Client(config);
    }
}

RamRoleArn

By specifying RAM Role, the credential will be able to automatically request maintenance of STS Token. If you want to limit the permissions(How to make a policy) of STS Token, you can assign value for Policy.

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception{
        Config config = new Config();
        // Which type of credential you want        
        config.setType("ram_role_arn");
        // AccessKeyId of your account
        config.setAccessKeyId("AccessKeyId");
        // AccessKeySecret of your account
        config.setAccessKeySecret("AccessKeySecret");
        // Format: acs:ram::USER_Id:role/ROLE_NAME
        // roleArn can be replaced by setting environment variable: ALIBABA_CLOUD_ROLE_ARN
        config.setRoleArn("RoleArn");
        // Role Session Name
        config.setRoleSessionName("RoleSessionName");
        // Not required, limit the permissions of STS Token
        config.setPolicy("policy");
        // Not required, limit the Valid time of STS Token
        config.setRoleSessionExpiration(3600);
        Client client = new Client(config);
    }
}

OIDCRoleArn

By specifying OIDC Role, the credential will be able to automatically request maintenance of STS Token. If you want to limit the permissions(How to make a policy) of STS Token, you can assign value for Policy.

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception{
        Config config = new Config();
        // Which type of credential you want
        config.setType("oidc_role_arn");
        // Format: acs:ram::USER_Id:role/ROLE_NAME
        // roleArn can be replaced by setting environment variable: ALIBABA_CLOUD_ROLE_ARN
        config.setRoleArn("RoleArn");
        // Format: acs:ram::USER_Id:oidc-provider/OIDC Providers 
        // oidcProviderArn can be replaced by setting environment variable: ALIBABA_CLOUD_OIDC_PROVIDER_ARN
        config.setOidcProviderArn("OIDCProviderArn");
        // Format: path
        // OIDCTokenFilePath can be replaced by setting environment variable: ALIBABA_CLOUD_OIDC_TOKEN_FILE
        config.setOidcTokenFilePath("/Users/xxx/xxx");
        // Role Session Name
        config.setRoleSessionName("RoleSessionName");
        // Not required, limit the permissions of STS Token
        config.setPolicy("policy");
        // Not required, the external ID of the RAM role
        // This parameter is provided by an external party and is used to prevent the confused deputy problem.
        config.setExternalId("externalId");
        // Not required, limit the Valid time of STS Token
        config.setRoleSessionExpiration(3600);
        Client client = new Client(config);
    }
}

EcsRamRole

By specifying the role name, the credential will be able to automatically request maintenance of STS Token.

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception {
        Config config = new Config();
        // Which type of credential you want
        config.setType("ecs_ram_role");
        // `roleName` is optional. It will be retrieved automatically if not set. It is highly recommended to set it up to reduce requests
        config.setRoleName("RoleName");
        // `enableIMDSv2` is optional and is recommended to be turned on. It can be replaced by setting environment variable: ALIBABA_CLOUD_ECS_IMDSV2_ENABLE
        config.enableIMDSv2(true);
        Client client = new Client(config);
    }
}

URLCredential

By specifying the url, the credential will be able to automatically request maintenance of STS Token.

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception {
        Config config = new Config();
        // Which type of credential you want
        config.setType("credentials_uri");
        // Format: http url. `credentialsURI` can be replaced by setting environment variable: ALIBABA_CLOUD_CREDENTIALS_URI
        config.setCredentialsUri("http://xxx");
        Client client = new Client(config);
    }
}

Bearer Token

If credential is required by the Cloud Call Centre (CCC), please apply for Bearer Token maintenance by yourself.

import com.aliyun.credentials.Client;
import com.aliyun.credentials.models.Config;

public class DemoTest {
    public static void main(String[] args) throws Exception {
        Config config = new Config();
        // Which type of credential you want
        config.setType("bearer");
        // BearerToken of your account
        config.setBearerToken("BearerToken");
        Client client = new Client(config);
    }
}

Use the default credential provider chain

If you call Client client = new Client(), it will use provider chain to get credential for you.

The default credential provider chain looks for available credentials, with following order:

1. System Properties

   Look for environment credentials in system properties. If the alibabacloud.accessKeyId and alibabacloud.accessKeyIdSecret system properties are defined and not empty, the program will use them to create default credentials.

2. Environment Credentials

   Look for environment credentials in environment variable. If the ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variables are defined and are not empty, the program will use them to create default credentials. If the ALIBABA_CLOUD_ACCESS_KEY_ID, ALIBABA_CLOUD_ACCESS_KEY_SECRET and ALIBABA_CLOUD_SECURITY_TOKEN environment variables are defined and are not empty, the program will use them to create temporary security credentials(STS). Note: This token has an expiration time, it is recommended to use it in a temporary environment.

3. Credentials File

   If there is ~/.alibabacloud/credentials default file (Windows shows C:\Users\USER_NAME\.alibabacloud\credentials), the program automatically creates credentials with the specified type and name. The default file is not necessarily exist, but a parse error will throw an exception. The name of configuration item is lowercase.This configuration file can be shared between different projects and between different tools. Because it is outside of the project and will not be accidentally committed to the version control. The path to the default file can be modified by defining the ALIBABA_CLOUD_CREDENTIALS_FILE environment variable. If not configured, use the default configuration default. You can also set the environment variables ALIBABA_CLOUD_PROFILE to use the configuration.

   [default]                          # default setting
   enable = true                      # Enable，Enabled by default if this option is not present
   type = access_key                  # Certification type: access_key
   access_key_id = foo                # Key
   access_key_secret = bar            # Secret
   
   [client1]                          # configuration that is named as `client1`
   type = ecs_ram_role                # Certification type: ecs_ram_role
   role_name = EcsRamRoleTest         # Role Name
   
   [client2]                          # configuration that is named as `client2`
   enable = false                     # Disable
   type = ram_role_arn                # Certification type: ram_role_arn
   region_id = cn-test                 
   policy = test                      # optional Specify permissions
   access_key_id = foo                
   access_key_secret = bar            
   role_arn = role_arn                # can be replaced by setting environment variable: ALIBABA_CLOUD_ROLE_ARN
   role_session_name = session_name   # optional
   
   [client3]                          # configuration that is named as `client3`
   enable = false                     # Disable
   type = oidc_role_arn               # Certification type: oidc_role_arn
   region_id = cn-test                 
   policy = test                      # optional Specify permissions
   role_arn = role_arn                # can be replaced by setting environment variable: ALIBABA_CLOUD_ROLE_ARN
   oidc_provider_arn = oidc_provider_arn # can be replaced by setting environment variable: ALIBABA_CLOUD_OIDC_PROVIDER_ARN
   oidc_token_file_path = /xxx/xxx    # can be replaced by setting environment variable: ALIBABA_CLOUD_OIDC_TOKEN_FILE              
   role_session_name = session_name   # optional

Issues

Opening an Issue, Issues not conforming to the guidelines may be closed immediately.

Changelog

Detailed changes for each release are documented in the release notes.

Contribution

Please make sure to read the Contributing Guide before making a pull request.

References

• OpenAPI Developer Portal
• Troubleshoot

License

Apache-2.0

Copyright 2009-present Alibaba Cloud All rights reserved.