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Get-STSFederationToken-Name <String>-Policy <String>-DurationInSeconds <Int32>
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. For a comparison of GetFederationToken
with the other APIs that produce temporary credentials, see Requesting Temporary Security Credentials and Comparing the AWS STS APIs in the IAM User Guide.
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 root account, but we do not recommended it. 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 that they need access to. For more information, see IAM Best Practices in the IAM User Guide.
The temporary security credentials that are obtained by using the long-term credentials of an IAM user are valid for the specified duration, from 900 seconds (15 minutes) up to a maximium of 129600 seconds (36 hours). The default is 43200 seconds (12 hours). Temporary credentials that are obtained by using AWS root account credentials have a maximum duration of 3600 seconds (1 hour).
The temporary security credentials created by GetFederationToken
can be used to make API calls to any AWS service with the following exceptions: GetCallerIdentity
. GetFederationToken
are determined by a combination of the following: GetFederationToken
. 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. Required? | False |
Position? | 3 |
Accept pipeline input? | False |
Bob
). For example, you can reference the federated user name in a resource-based policy, such as in an Amazon S3 bucket policy.The regex used to validate this parameter is a string of characters consisting of upper- and lower-case alphanumeric characters with no spaces. You can also include underscores or any of the following characters: =,.@- Required? | False |
Position? | 1 |
Accept pipeline input? | True (ByValue, ) |
GetFederationToken
call and evaluated along with the policy or policies that are attached to the IAM user whose credentials are used to call GetFederationToken
. The passed policy is used to scope down the permissions that are available to the IAM user, by allowing only a subset of the permissions that are granted to the IAM user. The passed policy cannot grant more permissions than those granted to the IAM user. The final permissions for the federated user are the most restrictive set based on the intersection of the passed policy and the IAM user policy.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.The format for this parameter, as described by its regex pattern, is a string of characters up to 2048 characters in length. The characters can be any ASCII character from the space character to the end of the valid character list (\u0020-\u00FF). It can also include the tab (\u0009), linefeed (\u000A), and carriage return (\u000D) characters.The policy plain text must be 2048 bytes or shorter. However, an internal conversion compresses it into a packed binary format with a separate limit. The PackedPolicySize response element indicates by percentage how close to the upper size limit the policy is, with 100% equaling the maximum allowed size.For more information about how permissions work, see Permissions for GetFederationToken. Required? | False |
Position? | 2 |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Used to specify the name and location of the ini-format credential file (shared with the AWS CLI and other AWS SDKs)
If this optional parameter is omitted this cmdlet will search the encrypted credential file used by the AWS SDK for .NET and AWS Toolkit for Visual Studio first. If the profile is not found then the cmdlet will search in the ini-format credential file at the default location: (user's home directory)\.aws\credentials. Note that the encrypted credential file is not supported on all platforms. It will be skipped when searching for profiles on Windows Nano Server, Mac, and Linux platforms.
If this parameter is specified then this cmdlet will only search the ini-format credential file at the location given.
As the current folder can vary in a shell or during script execution it is advised that you use specify a fully qualified path instead of a relative path.
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
Required? | False |
Position? | Named |
Accept pipeline input? | False |
The endpoint to make the call against.
Note: This parameter is primarily for internal AWS use and is not required/should not be specified for normal usage. The cmdlets normally determine which endpoint to call based on the region specified to the -Region parameter or set as default in the shell (via Set-DefaultAWSRegion). Only specify this parameter if you must direct the call to a specific custom endpoint.
Required? | False |
Position? | Named |
Accept pipeline input? | False |
PS C:\>Get-STSFederationToken -Name "Bob" -Policy "...JSON policy..." -DurationInSeconds 3600Requests a federated token valid for one hour using "Bob" as the name of the federated user. This name can be used to reference the federated user name in a resource-based policy (such as an Amazon S3 bucket policy). The supplied IAM policy, in JSON format, is used to scope down the permissions that are available to the IAM user. The supplied policy cannot grant more permissions than those granted to the requesting user, with the final permissions for the federated user being the most restrictive set based on the intersection of the passed policy and the IAM user policy.
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