Class ExternalAccountCredentials (1.27.0) 

public abstract class ExternalAccountCredentials extends GoogleCredentials

Base external account credentials class.

Handles initializing external credentials, calls to the Security Token Service, and service account impersonation.

Inheritance

java.lang.Object > Credentials > OAuth2Credentials > GoogleCredentials > ExternalAccountCredentials

Static Methods

fromStream(InputStream credentialsStream)

public static ExternalAccountCredentials fromStream(InputStream credentialsStream)

Returns credentials defined by a JSON file stream.

Returns IdentityPoolCredentials or AwsCredentials.

Parameter
Name Description
credentialsStream InputStream

the stream with the credential definition
Returns
Type Description
ExternalAccountCredentials

the credential defined by the credentialsStream
Exceptions
Type Description
IOException

if the credential cannot be created from the stream

fromStream(InputStream credentialsStream, HttpTransportFactory transportFactory)

public static ExternalAccountCredentials fromStream(InputStream credentialsStream, HttpTransportFactory transportFactory)

Returns credentials defined by a JSON file stream.

Returns a IdentityPoolCredentials or AwsCredentials.

Parameters
Name Description
credentialsStream InputStream

the stream with the credential definition
transportFactory HttpTransportFactory

the HTTP transport factory used to create the transport to get access tokens
Returns
Type Description
ExternalAccountCredentials

the credential defined by the credentialsStream
Exceptions
Type Description
IOException

if the credential cannot be created from the stream

Constructors

ExternalAccountCredentials(HttpTransportFactory transportFactory, String audience, String subjectTokenType, String tokenUrl, ExternalAccountCredentials.CredentialSource credentialSource, String tokenInfoUrl, String serviceAccountImpersonationUrl, String quotaProjectId, String clientId, String clientSecret, Collection<String> scopes)

protected ExternalAccountCredentials(HttpTransportFactory transportFactory, String audience, String subjectTokenType, String tokenUrl, ExternalAccountCredentials.CredentialSource credentialSource, String tokenInfoUrl, String serviceAccountImpersonationUrl, String quotaProjectId, String clientId, String clientSecret, Collection<String> scopes)

Constructor with minimum identifying information and custom HTTP transport. Does not support workforce credentials.

Parameters
Name Description
transportFactory HttpTransportFactory

HTTP transport factory, creates the transport used to get access tokens
audience String

the Security Token Service audience, which is usually the fully specified resource name of the workload/workforce pool provider
subjectTokenType String

the Security Token Service subject token type based on the OAuth 2.0 token exchange spec. Indicates the type of the security token in the credential file
tokenUrl String

the Security Token Service token exchange endpoint
credentialSource com.google.auth.oauth2.ExternalAccountCredentials.CredentialSource

the external credential source
tokenInfoUrl String

the endpoint used to retrieve account related information. Required for gCloud session account identification.
serviceAccountImpersonationUrl String

the URL for the service account impersonation request. This URL is required for some APIs. If this URL is not available, the access token from the Security Token Service is used directly. May be null.
quotaProjectId String

the project used for quota and billing purposes. May be null.
clientId String

client ID of the service account from the console. May be null.
clientSecret String

client secret of the service account from the console. May be null.
scopes Collection<String>

the scopes to request during the authorization grant. May be null.

ExternalAccountCredentials(HttpTransportFactory transportFactory, String audience, String subjectTokenType, String tokenUrl, ExternalAccountCredentials.CredentialSource credentialSource, String tokenInfoUrl, String serviceAccountImpersonationUrl, String quotaProjectId, String clientId, String clientSecret, Collection<String> scopes, EnvironmentProvider environmentProvider)

protected ExternalAccountCredentials(HttpTransportFactory transportFactory, String audience, String subjectTokenType, String tokenUrl, ExternalAccountCredentials.CredentialSource credentialSource, String tokenInfoUrl, String serviceAccountImpersonationUrl, String quotaProjectId, String clientId, String clientSecret, Collection<String> scopes, EnvironmentProvider environmentProvider)

Constructor with minimum identifying information and custom HTTP transport. Does not support workforce credentials.

Parameters
Name Description
transportFactory HttpTransportFactory

HTTP transport factory, creates the transport used to get access tokens
audience String

the Security Token Service audience, which is usually the fully specified resource name of the workload/workforce pool provider
subjectTokenType String

the Security Token Service subject token type based on the OAuth 2.0 token exchange spec. Indicates the type of the security token in the credential file
tokenUrl String

the Security Token Service token exchange endpoint
credentialSource com.google.auth.oauth2.ExternalAccountCredentials.CredentialSource

the external credential source
tokenInfoUrl String

the endpoint used to retrieve account related information. Required for gCloud session account identification.
serviceAccountImpersonationUrl String

the URL for the service account impersonation request. This URL is required for some APIs. If this URL is not available, the access token from the Security Token Service is used directly. May be null.
quotaProjectId String

the project used for quota and billing purposes. May be null.
clientId String

client ID of the service account from the console. May be null.
clientSecret String

client secret of the service account from the console. May be null.
scopes Collection<String>

the scopes to request during the authorization grant. May be null.
environmentProvider com.google.auth.oauth2.EnvironmentProvider

the environment provider. May be null. Defaults to SystemEnvironmentProvider.

ExternalAccountCredentials(ExternalAccountCredentials.Builder builder)

protected ExternalAccountCredentials(ExternalAccountCredentials.Builder builder)

Internal constructor with minimum identifying information and custom HTTP transport. See ExternalAccountCredentials.Builder.

Parameter
Name Description
builder ExternalAccountCredentials.Builder

the Builder object used to construct the credentials.

Fields

impersonatedCredentials

protected ImpersonatedCredentials impersonatedCredentials
Field Value
Type Description
ImpersonatedCredentials

transportFactory

protected transient HttpTransportFactory transportFactory
Field Value
Type Description
HttpTransportFactory

Methods

exchangeExternalCredentialForAccessToken(StsTokenExchangeRequest stsTokenExchangeRequest)

protected AccessToken exchangeExternalCredentialForAccessToken(StsTokenExchangeRequest stsTokenExchangeRequest)

Exchanges the external credential for a Google Cloud access token.

Parameter
Name Description
stsTokenExchangeRequest com.google.auth.oauth2.StsTokenExchangeRequest

the Security Token Service token exchange request
Returns
Type Description
AccessToken

the access token returned by the Security Token Service
Exceptions
Type Description
IOException

if the call to the Security Token Service fails

getAudience()

public String getAudience()
Returns
Type Description
String

getClientId()

public String getClientId()
Returns
Type Description
String

getClientSecret()

public String getClientSecret()
Returns
Type Description
String

getCredentialSource()

public ExternalAccountCredentials.CredentialSource getCredentialSource()
Returns
Type Description
com.google.auth.oauth2.ExternalAccountCredentials.CredentialSource

getRequestMetadata(URI uri)

public Map<String,List<String>> getRequestMetadata(URI uri)

Provide the request metadata by ensuring there is a current access token and providing it as an authorization bearer token.

Parameter
Name Description
uri URI
Returns
Type Description
Map<String,List<String>>
Overrides
Exceptions
Type Description
IOException

getRequestMetadata(URI uri, Executor executor, RequestMetadataCallback callback)

public void getRequestMetadata(URI uri, Executor executor, RequestMetadataCallback callback)

Get the current request metadata without blocking.

This should be called by the transport layer on each request, and the data should be populated in headers or other context. The implementation can either call the callback inline or asynchronously. Either way it should never block in this method. The executor is provided for tasks that may block.

The default implementation will just call #getRequestMetadata(URI) then the callback from the given executor.

The convention for handling binary data is for the key in the returned map to end with "-bin" and for the corresponding values to be base64 encoded.

Parameters
Name Description
uri URI
executor Executor
callback RequestMetadataCallback
Overrides

getScopes()

public Collection<String> getScopes()
Returns
Type Description
Collection<String>

getServiceAccountEmail()

public String getServiceAccountEmail()
Returns
Type Description
String

The service account email to be impersonated, if available

getServiceAccountImpersonationOptions()

public ExternalAccountCredentials.ServiceAccountImpersonationOptions getServiceAccountImpersonationOptions()
Returns
Type Description
com.google.auth.oauth2.ExternalAccountCredentials.ServiceAccountImpersonationOptions

getServiceAccountImpersonationUrl()

public String getServiceAccountImpersonationUrl()
Returns
Type Description
String

getSubjectTokenType()

public String getSubjectTokenType()
Returns
Type Description
String

getTokenInfoUrl()

public String getTokenInfoUrl()
Returns
Type Description
String

getTokenUrl()

public String getTokenUrl()
Returns
Type Description
String

getUniverseDomain()

public String getUniverseDomain()

Gets the universe domain for the credential.

Returns
Type Description
String
Overrides

getWorkforcePoolUserProject()

public String getWorkforcePoolUserProject()
Returns
Type Description
String

isWorkforcePoolConfiguration()

public boolean isWorkforcePoolConfiguration()
Returns
Type Description
boolean

whether the current configuration is for Workforce Pools (which enable 3p user identities, rather than workloads)

retrieveSubjectToken()

public abstract String retrieveSubjectToken()

Retrieves the external subject token to be exchanged for a Google Cloud access token.

Must be implemented by subclasses as the retrieval method is dependent on the credential source.

Returns
Type Description
String

the external subject token
Exceptions
Type Description
IOException

if the subject token cannot be retrieved