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Returns a set of temporary security credentials for users who have been authenticated
via a SAML authentication response. This operation provides a mechanism for tying
an enterprise identity store or directory to role-based Amazon Web Services access
without user-specific credentials or configuration. For a comparison of AssumeRoleWithSAML
with the other API operations that produce temporary credentials, see Requesting
Temporary Security Credentials and Comparing
the Amazon Web Services STS API operations in the IAM User Guide.
The temporary security credentials returned by this operation consist of an access key ID, a secret access key, and a security token. Applications can use these temporary security credentials to sign calls to Amazon Web Services services.
Session Duration
By default, the temporary security credentials created by AssumeRoleWithSAML
last for one hour. However, you can use the optional DurationSeconds parameter
to specify the duration of your session. Your role session lasts for the duration
that you specify, or until the time specified in the SAML authentication response's
SessionNotOnOrAfter value, whichever is shorter. You can provide a DurationSeconds
value from 900 seconds (15 minutes) up to the maximum session duration setting for
the role. This setting can have a value from 1 hour to 12 hours. To learn how to view
the maximum value for your role, see View
the Maximum Session Duration Setting for a Role in the IAM User Guide.
The maximum session duration limit applies when you use the AssumeRole* API
operations or the assume-role* CLI commands. However the limit does not apply
when you use those operations to create a console URL. For more information, see Using IAM
Roles in the IAM User Guide.
Role
chaining limits your CLI or Amazon Web Services API role session to a maximum
of one hour. When you use the AssumeRole API operation to assume a role, you
can specify the duration of your role session with the DurationSeconds parameter.
You can specify a parameter value of up to 43200 seconds (12 hours), depending on
the maximum session duration setting for your role. However, if you assume a role
using role chaining and provide a DurationSeconds parameter value greater than
one hour, the operation fails.
Permissions
The temporary security credentials created by AssumeRoleWithSAML can be used
to make API calls to any Amazon Web Services service with the following exception:
you cannot call the STS GetFederationToken or GetSessionToken API operations.
(Optional) You can pass inline or managed session policies to this operation. You can pass a single JSON policy document to use as an inline session policy. You can also specify up to 10 managed policy Amazon Resource Names (ARNs) to use as managed session policies. The plaintext that you use for both inline and managed session policies can't exceed 2,048 characters. Passing policies to this operation returns new temporary credentials. The resulting session's permissions are the intersection of the role's identity-based policy and the session policies. You can use the role's temporary credentials in subsequent Amazon Web Services API calls to access resources in the account that owns the role. You cannot use session policies to grant more permissions than those allowed by the identity-based policy of the role that is being assumed. For more information, see Session Policies in the IAM User Guide.
Calling AssumeRoleWithSAML does not require the use of Amazon Web Services
security credentials. The identity of the caller is validated by using keys in the
metadata document that is uploaded for the SAML provider entity for your identity
provider.
Calling AssumeRoleWithSAML can result in an entry in your CloudTrail logs.
The entry includes the value in the NameID element of the SAML assertion. We
recommend that you use a NameIDType that is not associated with any personally
identifiable information (PII). For example, you could instead use the persistent
identifier (urn:oasis:names:tc:SAML:2.0:nameid-format:persistent).
Tags
(Optional) You can configure your IdP to pass attributes into your SAML assertion as session tags. Each session tag consists of a key name and an associated value. For more information about session tags, see Passing Session Tags in STS in the IAM User Guide.
You can pass up to 50 session tags. The plaintext session tag keys can’t exceed 128 characters and the values can’t exceed 256 characters. For these and additional limits, see IAM and STS Character Limits in the IAM User Guide.
An Amazon Web Services conversion compresses the passed inline session policy, managed
policy ARNs, and session tags into a packed binary format that has a separate limit.
Your request can fail for this limit even if your plaintext meets the other requirements.
The PackedPolicySize response element indicates by percentage how close the
policies and tags for your request are to the upper size limit.
You can pass a session tag with the same key as a tag that is attached to the role. When you do, session tags override the role's tags with the same key.
An administrator must grant you the permissions necessary to pass session tags. The administrator can also create granular permissions to allow you to pass only specific session tags. For more information, see Tutorial: Using Tags for Attribute-Based Access Control in the IAM User Guide.
You can set the session tags as transitive. Transitive tags persist during role chaining. For more information, see Chaining Roles with Session Tags in the IAM User Guide.
SAML Configuration
Before your application can call AssumeRoleWithSAML, you must configure your
SAML identity provider (IdP) to issue the claims required by Amazon Web Services.
Additionally, you must use Identity and Access Management (IAM) to create a SAML provider
entity in your Amazon Web Services account that represents your identity provider.
You must also create an IAM role that specifies this SAML provider in its trust policy.
For more information, see the following resources:
About SAML 2.0-based Federation in the IAM User Guide.
Creating SAML Identity Providers in the IAM User Guide.
Configuring a Relying Party and Claims in the IAM User Guide.
Creating a Role for SAML 2.0 Federation in the IAM User Guide.
For .NET Core this operation is only available in asynchronous form. Please refer to AssumeRoleWithSAMLAsync.
Namespace: Amazon.SecurityToken
Assembly: AWSSDK.SecurityToken.dll
Version: 3.x.y.z
public abstract AssumeRoleWithSAMLResponse AssumeRoleWithSAML( AssumeRoleWithSAMLRequest request )
Container for the necessary parameters to execute the AssumeRoleWithSAML service method.
| Exception | Condition |
|---|---|
| ExpiredTokenException | The web identity token that was passed is expired or is not valid. Get a new identity token from the identity provider and then retry the request. |
| IDPRejectedClaimException | The identity provider (IdP) reported that authentication failed. This might be because the claim is invalid. If this error is returned for the AssumeRoleWithWebIdentity operation, it can also mean that the claim has expired or has been explicitly revoked. |
| InvalidIdentityTokenException | The web identity token that was passed could not be validated by Amazon Web Services. Get a new identity token from the identity provider and then retry the request. |
| MalformedPolicyDocumentException | The request was rejected because the policy document was malformed. The error message describes the specific error. |
| PackedPolicyTooLargeException | The request was rejected because the total packed size of the session policies and session tags combined was too large. An Amazon Web Services conversion compresses the session policy document, session policy ARNs, and session tags into a packed binary format that has a separate limit. The error message indicates by percentage how close the policies and tags are to the upper size limit. For more information, see Passing Session Tags in STS in the IAM User Guide. You could receive this error even though you meet other defined session policy and session tag limits. For more information, see IAM and STS Entity Character Limits in the IAM User Guide. |
| RegionDisabledException | STS is not activated in the requested region for the account that is being asked to generate credentials. The account administrator must use the IAM console to activate STS in that region. For more information, see Activating and Deactivating Amazon Web Services STS in an Amazon Web Services Region in the IAM User Guide. |
var client = new AmazonSecurityTokenServiceClient();
var response = client.AssumeRoleWithSAML(new AssumeRoleWithSAMLRequest
{
DurationSeconds = 3600,
PrincipalArn = "arn:aws:iam::123456789012:saml-provider/SAML-test",
RoleArn = "arn:aws:iam::123456789012:role/TestSaml",
SAMLAssertion = "VERYLONGENCODEDASSERTIONEXAMPLExzYW1sOkF1ZGllbmNlPmJsYW5rPC9zYW1sOkF1ZGllbmNlPjwvc2FtbDpBdWRpZW5jZVJlc3RyaWN0aW9uPjwvc2FtbDpDb25kaXRpb25zPjxzYW1sOlN1YmplY3Q+PHNhbWw6TmFtZUlEIEZvcm1hdD0idXJuOm9hc2lzOm5hbWVzOnRjOlNBTUw6Mi4wOm5hbWVpZC1mb3JtYXQ6dHJhbnNpZW50Ij5TYW1sRXhhbXBsZTwvc2FtbDpOYW1lSUQ+PHNhbWw6U3ViamVjdENvbmZpcm1hdGlvbiBNZXRob2Q9InVybjpvYXNpczpuYW1lczp0YzpTQU1MOjIuMDpjbTpiZWFyZXIiPjxzYW1sOlN1YmplY3RDb25maXJtYXRpb25EYXRhIE5vdE9uT3JBZnRlcj0iMjAxOS0xMS0wMVQyMDoyNTowNS4xNDVaIiBSZWNpcGllbnQ9Imh0dHBzOi8vc2lnbmluLmF3cy5hbWF6b24uY29tL3NhbWwiLz48L3NhbWw6U3ViamVjdENvbmZpcm1hdGlvbj48L3NhbWw6U3ViamVjdD48c2FtbDpBdXRoblN0YXRlbWVudCBBdXRoPD94bWwgdmpSZXNwb25zZT4="
});
AssumedRoleUser assumedRoleUser = response.AssumedRoleUser;
string audience = response.Audience;
Credentials credentials = response.Credentials;
string issuer = response.Issuer;
string nameQualifier = response.NameQualifier;
int packedPolicySize = response.PackedPolicySize;
string subject = response.Subject;
string subjectType = response.SubjectType;
.NET Framework:
Supported in: 4.5, 4.0, 3.5