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Authentication

The java-sdk-core project supports the following types of authentication:

  • Basic Authentication
  • Bearer Token Authentication
  • Identity and Access Management (IAM) Authentication
  • Container Authentication
  • VPC Instance Authentication
  • Cloud Pak for Data Authentication
  • Multi-Cloud Saas Platform (MCSP) Authentication
  • No Authentication (for testing)

The SDK user configures the appropriate type of authentication for use with service instances.
The authentication types that are appropriate for a particular service may vary from service to service, so it is important for the SDK user to consult with the appropriate service documentation to understand which authenticators are supported for that service.

The java-sdk-core allows an authenticator to be specified in one of two ways:

  1. programmatically - the SDK user constructs an instance of the desired authenticator using the appropriate Builder class or constructor, and then passes the authenticator instance when constructing an instance of the service.
  2. configuration - the SDK user provides external configuration information (in the form of environment variables or a credentials file) to indicate the type of authenticator, along with the configuration of the necessary properties for that authenticator. The SDK user then invokes the configuration-based service client constructor method to construct an instance of the authenticator and service client that reflect the external configuration information.

The sections below will provide detailed information for each authenticator which will include the following:

  • A description of the authenticator
  • The properties associated with the authenticator
  • An example of how to construct the authenticator programmatically
  • An example of how to configure the authenticator through the use of external configuration information. The configuration examples below will use environment variables, although the same properties could be specified in a credentials file instead.

Basic Authentication

The BasicAuthenticator is used to add Basic Authentication information to each outbound request in the Authorization header in the form:

   Authorization: Basic <encoded username and password>

Properties

  • username: (required) the basic auth username

  • password: (required) the basic auth password

Programming example

import com.ibm.cloud.sdk.core.security.BasicAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
// Create the authenticator.
BasicAuthenticator authenticator = new BasicAuthenticator.Builder()
    .username("myuser")
    .password("mypassword")
    .build();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=basic
export EXAMPLE_SERVICE_USERNAME=myuser
export EXAMPLE_SERVICE_PASSWORD=mypassword

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance from configuration properties.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

Bearer Token Authentication

The BearerTokenAuthenticator will add a user-supplied bearer token to each outbound request in the Authorization header in the form:

    Authorization: Bearer <bearer-token>

Properties

  • bearerToken: (required) the bearer token value

Programming example

import com.ibm.cloud.sdk.core.security.BearerTokenAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
String bearerToken = // ... obtain bearer token value ...

// Create the authenticator.
BearerTokenAuthenticator authenticator = new BearerTokenAuthenticator(bearerToken);

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.
...
// Later, if your bearer token value expires, you can set a new one like this:
newToken = // ... obtain new bearer token value
authenticator.setBearerToken(newToken);

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=bearertoken
export EXAMPLE_SERVICE_BEARER_TOKEN=<the bearer token value>

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

Note that the use of external configuration is not as useful with the BearerTokenAuthenticator as it is for other authenticator types because bearer tokens typically need to be obtained and refreshed programmatically since they normally have a relatively short lifespan before they expire. This authenticator type is intended for situations in which the application will be managing the bearer token itself in terms of initial acquisition and refreshing as needed.

Identity and Access Management (IAM) Authentication

The IamAuthenticator will accept a user-supplied api key and will perform the necessary interactions with the IAM token service to obtain a suitable bearer token for the specified api key. The authenticator will also obtain a new bearer token when the current token expires. The bearer token is then added to each outbound request in the Authorization header in the form:

   Authorization: Bearer <bearer-token>

Properties

  • apikey: (required) the IAM api key

  • url: (optional) The base endpoint URL of the IAM token service. The default value of this property is the "prod" IAM token service endpoint (https://iam.cloud.ibm.com). Make sure that you use an IAM token service endpoint that is appropriate for the location of the service being used by your application. For example, if you are using an instance of a service in the "production" environment (e.g. https://resource-controller.cloud.ibm.com), then the default "prod" IAM token service endpoint should suffice. However, if your application is using an instance of a service in the "staging" environment (e.g. https://resource-controller.test.cloud.ibm.com), then you would also need to configure the authenticator to use the IAM token service "staging" endpoint as well (https://iam.test.cloud.ibm.com).

  • clientId/clientSecret: (optional) The clientId and clientSecret fields are used to form a "basic auth" Authorization header for interactions with the IAM token server. If neither field is specified, then no Authorization header will be sent with token server requests. These fields are optional, but must be specified together.

  • scope: (optional) the scope to be associated with the IAM access token. If not specified, then no scope will be associated with the access token.

  • disableSSLVerification: (optional) A flag that indicates whether verificaton of the server's SSL certificate should be disabled or not. The default value is false.

  • headers: (optional) A set of key/value pairs that will be sent as HTTP headers in requests made to the IAM token service.

Programming example

import com.ibm.cloud.sdk.core.security.IamAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
// Create the authenticator.
IamAuthenticator authenticator = new IamAuthenticator.Builder()
    .apikey("myapikey")
    .build();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=iam
export EXAMPLE_SERVICE_APIKEY=myapikey

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

Container Authentication

The ContainerAuthenticator is intended to be used by application code running inside a compute resource managed by the IBM Kubernetes Service (IKS) in which a secure compute resource token (CR token) has been stored in a file within the compute resource's local file system. The CR token is similar to an IAM apikey except that it is managed automatically by the compute resource provider (IKS). This allows the application developer to:

  • avoid storing credentials in application code, configuraton files or a password vault
  • avoid managing or rotating credentials

The ContainerAuthenticator will retrieve the CR token from the compute resource in which the application is running, and will then perform the necessary interactions with the IAM token service to obtain an IAM access token using the IAM "get token" operation with grant-type cr-token. The authenticator will repeat these steps to obtain a new IAM access token when the current access token expires. The IAM access token is added to each outbound request in the Authorization header in the form:

   Authorization: Bearer <IAM-access-token>

Properties

  • crTokenFilename: (optional) the name of the file containing the injected CR token value. If not specified, then the authenticator will first try /var/run/secrets/tokens/vault-token and then /var/run/secrets/tokens/sa-token as the default value (first file found is used). The application must have read permissions on the file containing the CR token value.

  • iamProfileName: (optional) the name of the linked trusted IAM profile to be used when obtaining the IAM access token (a CR token might map to multiple IAM profiles). One of iamProfileName or iamProfileID must be specified.

  • iamProfileID: (optional) the id of the linked trusted IAM profile to be used when obtaining the IAM access token (a CR token might map to multiple IAM profiles). One of iamProfileName or iamProfileID must be specified.

  • url: (optional) The base endpoint URL of the IAM token service. The default value of this property is the "prod" IAM token service endpoint (https://iam.cloud.ibm.com). Make sure that you use an IAM token service endpoint that is appropriate for the location of the service being used by your application. For example, if you are using an instance of a service in the "production" environment (e.g. https://resource-controller.cloud.ibm.com), then the default "prod" IAM token service endpoint should suffice. However, if your application is using an instance of a service in the "staging" environment (e.g. https://resource-controller.test.cloud.ibm.com), then you would also need to configure the authenticator to use the IAM token service "staging" endpoint as well (https://iam.test.cloud.ibm.com).

  • clientId/clientSecret: (optional) The clientId and clientSecret fields are used to form a "basic auth" Authorization header for interactions with the IAM token service. If neither field is specified, then no Authorization header will be sent with token server requests. These fields are optional, but must be specified together.

  • scope: (optional) the scope to be associated with the IAM access token. If not specified, then no scope will be associated with the access token.

  • disableSSLVerification: (optional) A flag that indicates whether verificaton of the server's SSL certificate should be disabled or not. The default value is false.

  • headers: (optional) A set of key/value pairs that will be sent as HTTP headers in requests made to the IAM token service.

Programming example

import com.ibm.cloud.sdk.core.security.ContainerAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
// Create the authenticator.
ContainerAuthenticator authenticator = new ContainerAuthenticator.Builder()
    .iamProfileName("iam-user123")
    .build();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=container
export EXAMPLE_SERVICE_IAM_PROFILE_NAME=iam-user123

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

VPC Instance Authentication

The VpcInstanceAuthenticator is intended to be used by application code running inside a VPC-managed compute resource (virtual server instance) that has been configured to use the "compute resource identity" feature. The compute resource identity feature allows you to assign a trusted IAM profile to the compute resource as its "identity". This, in turn, allows applications running within the compute resource to take on this identity when interacting with IAM-secured IBM Cloud services. This results in a simplified security model that allows the application developer to:

  • avoid storing credentials in application code, configuraton files or a password vault
  • avoid managing or rotating credentials

The VpcInstanceAuthenticator will invoke the appropriate operations on the compute resource's locally-available VPC Instance Metadata Service to (1) retrieve an instance identity token and then (2) exchange that instance identity token for an IAM access token. The authenticator will repeat these steps to obtain a new IAM access token whenever the current access token expires. The IAM access token is added to each outbound request in the Authorization header in the form:

   Authorization: Bearer <IAM-access-token>

Properties

  • iamProfileCrn: (optional) the crn of the linked trusted IAM profile to be used when obtaining the IAM access token.

  • iamProfileId: (optional) the id of the linked trusted IAM profile to be used when obtaining the IAM access token.

  • url: (optional) The base endpoint URL of the VPC Instance Metadata Service.
    The default value of this property is http://169.254.169.254. However, if the VPC Instance Metadata Service is configured with the HTTP Secure Protocol setting (https), then you should configure this property to be https://api.metadata.cloud.ibm.com.

Usage Notes:

  1. At most one of iamProfileCrn or iamProfileId may be specified. The specified value must map to a trusted IAM profile that has been linked to the compute resource (virtual server instance).

  2. If both iamProfileCrn and iamProfileId are specified, then an error occurs.

  3. If neither iamProfileCrn nor iamProfileId are specified, then the default trusted profile linked to the compute resource will be used to perform the IAM token exchange. If no default trusted profile is defined for the compute resource, then an error occurs.

Programming example

import com.ibm.cloud.sdk.core.security.VpcInstanceAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
// Create the authenticator.
VpcInstanceAuthenticator authenticator = new VpcInstanceAuthenticator.Builder()
    .iamProfileCrn("crn:iam-profile-123")
    .build();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=vpc
export EXAMPLE_SERVICE_IAM_PROFILE_CRN=crn:iam-profile-123

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

Cloud Pak for Data Authentication

The CloudPakForDataAuthenticator will accept a user-supplied username value, along with either a password or apikey, and will perform the necessary interactions with the Cloud Pak for Data token service to obtain a suitable bearer token. The authenticator will also obtain a new bearer token when the current token expires. The bearer token is then added to each outbound request in the Authorization header in the form:

   Authorization: Bearer <bearer-token>

Properties

  • username: (required) the username used to obtain a bearer token.

  • password: (required if apikey is not specified) the password used to obtain a bearer token.

  • apikey: (required if password is not specified) the apikey used to obtain a bearer token.

  • url: (required) The base URL associated with the Cloud Pak for Data token service.

  • disableSSLVerification: (optional) A flag that indicates whether verificaton of the server's SSL certificate should be disabled or not. The default value is false.

  • headers: (optional) A set of key/value pairs that will be sent as HTTP headers in requests made to the IAM token service.

Programming example

import com.ibm.cloud.sdk.core.security.CloudPakForDataAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the authenticator.
CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator.Builder()
    .url("https://mycp4dhost.com")
    .username("myuser")
    .apikey("myapikey")
    .build();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

# Configure "example_service" with username/apikey.
export EXAMPLE_SERVICE_AUTH_TYPE=cp4d
export EXAMPLE_SERVICE_USERNAME=myuser
export EXAMPLE_SERVICE_APIKEY=myapikey
export EXAMPLE_SERVICE_URL=https://mycp4dhost.com

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

Multi-Cloud Saas Platform (MCSP) Authentication

The MCSPAuthenticator can be used in scenarios where an application needs to interact with an IBM Cloud service that has been deployed to a non-IBM Cloud environment (e.g. AWS). It accepts a user-supplied apikey and performs the necessary interactions with the Multi-Cloud Saas Platform token service to obtain a suitable MCSP access token (a bearer token) for the specified apikey. The authenticator will also obtain a new bearer token when the current token expires. The bearer token is then added to each outbound request in the Authorization header in the form:

   Authorization: Bearer <bearer-token>

Properties

  • apikey: (required) the apikey to be used to obtain an MCSP access token.

  • url: (required) The URL representing the MCSP token service endpoint's base URL string. Do not include the operation path (e.g. /siusermgr/api/1.0/apikeys/token) as part of this property's value.

  • disableSSLVerification: (optional) A flag that indicates whether verificaton of the server's SSL certificate should be disabled or not. The default value is false.

  • headers: (optional) A set of key/value pairs that will be sent as HTTP headers in requests made to the MCSP token service.

Usage Notes

  • When constructing an MCSPAuthenticator instance, you must specify the apikey and url properties.

  • The authenticator will use the token server's POST /siusermgr/api/1.0/apikeys/token operation to exchange the user-supplied apikey for an MCSP access token (the bearer token).

Programming example

import com.ibm.cloud.sdk.core.security.MCSPAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
// Create the authenticator.
MCSPAuthenticator authenticator = new MCSPAuthenticator.Builder()
    .apikey("myapikey")
    .url("https://example.mcsp.token-exchange.com")
    .build();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=mcsp
export EXAMPLE_SERVICE_APIKEY=myapikey
export EXAMPLE_SERVICE_AUTH_URL=https://example.mcsp.token-exchange.com

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.

No Auth Authentication

The NoAuthAuthenticator is a placeholder authenticator which performs no actual authentication function. It can be used in situations where authentication needs to be bypassed, perhaps while developing or debugging an application or service.

Properties

None

Programming example

import com.ibm.cloud.sdk.core.security.NoAuthAuthenticator;
import <sdk_base_package>.ExampleService.v1.ExampleService;
...
// Create the authenticator.
NoAuthAuthenticator authenticator = new NoAuthAuthenticator();

// Create the service instance.
ExampleService service = new ExampleService(ExampleService.DEFAULT_SERVICE_NAME, authenticator);

// 'service' can now be used to invoke operations.

Configuration example

External configuration:

export EXAMPLE_SERVICE_AUTH_TYPE=noauth

Application code:

import <sdk_base_package>.ExampleService.v1.ExampleService;
...

// Create the service instance.
ExampleService service = ExampleService.newInstance("example_service");

// 'service' can now be used to invoke operations.