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GetFederationToken
action using the long-term security credentials of an IAM user, this call is appropriate
in contexts where those credentials can be safely stored, usually in a server-based
application.
If you are creating a mobile-based or browser-based app that can authenticate users
using a web identity provider like Login with Amazon, Facebook, Google, or an OpenID
Connect-compatible identity provider, we recommend that you use Amazon
Cognito or AssumeRoleWithWebIdentity
. For more information, see Federation
Through a Web-based Identity Provider.
The GetFederationToken
action must be called by using the long-term AWS
security credentials of an IAM user. You can also call GetFederationToken
using the security credentials of an AWS account (root), but this is not recommended.
Instead, we recommend that you create an IAM user for the purpose of the proxy application
and then attach a policy to the IAM user that limits federated users to only the actions
and resources they need access to. For more information, see IAM
Best Practices in the Using IAM.
The temporary security credentials that are obtained by using the long-term credentials of an IAM user are valid for the specified duration, between 900 seconds (15 minutes) and 129600 seconds (36 hours). Temporary credentials that are obtained by using AWS account (root) credentials have a maximum duration of 3600 seconds (1 hour)
Permissions
The permissions for the temporary security credentials returned by GetFederationToken
are determined by a combination of the following:
GetFederationToken
.
The passed policy is attached to the temporary security credentials that result from
the GetFederationToken
API call--that is, to the federated user.
When the federated user makes an AWS request, AWS evaluates the policy attached to
the federated user in combination with the policy or policies attached to the IAM
user whose credentials were used to call GetFederationToken
. AWS allows
the federated user's request only when both the federated user and the
IAM user are explicitly allowed to perform the requested action. The passed policy
cannot grant more permissions than those that are defined in the IAM user policy.
A typical use case is that the permissions of the IAM user whose credentials are used
to call GetFederationToken
are designed to allow access to all the actions
and resources that any federated user will need. Then, for individual users, you pass
a policy to the operation that scopes down the permissions to a level that's appropriate
to that individual user, using a policy that allows only a subset of permissions that
are granted to the IAM user.
If you do not pass a policy, the resulting temporary security credentials have no effective permissions. The only exception is when the temporary security credentials are used to access a resource that has a resource-based policy that specifically allows the federated user to access the resource.
For more information about how permissions work, see Permissions
for GetFederationToken. For information about using GetFederationToken
to create temporary security credentials, see GetFederationToken—Federation
Through a Custom Identity Broker.
Namespace: Amazon.SecurityToken.Model
Assembly: AWSSDK.dll
Version: (assembly version)
public class GetFederationTokenRequest : AmazonSecurityTokenServiceRequest IRequestEvents
The GetFederationTokenRequest type exposes the following members
Name | Description | |
---|---|---|
GetFederationTokenRequest() | Empty constructor used to set properties independently even when a simple constructor is available | |
GetFederationTokenRequest(string) | Instantiates GetFederationTokenRequest with the parameterized properties |
Name | Type | Description | |
---|---|---|---|
DurationSeconds | System.Int32 |
Gets and sets the property DurationSeconds.
The duration, in seconds, that the session should last. Acceptable durations for federation sessions range from 900 seconds (15 minutes) to 129600 seconds (36 hours), with 43200 seconds (12 hours) as the default. Sessions obtained using AWS account (root) credentials are restricted to a maximum of 3600 seconds (one hour). If the specified duration is longer than one hour, the session obtained by using AWS account (root) credentials defaults to one hour. |
|
Name | System.String |
Gets and sets the property Name.
The name of the federated user. The name is used as an identifier for the temporary
security credentials (such as |
|
Policy | System.String |
Gets and sets the property Policy.
An IAM policy in JSON format that is passed with the If you do not pass a policy, the resulting temporary security credentials have no effective permissions. The only exception is when the temporary security credentials are used to access a resource that has a resource-based policy that specifically allows the federated user to access the resource. For more information about how permissions work, see Permissions for GetFederationToken. |
.NET Framework:
Supported in: 4.5, 4.0, 3.5
.NET for Windows Store apps:
Supported in: Windows 8.1, Windows 8
.NET for Windows Phone:
Supported in: Windows Phone 8.1, Windows Phone 8