def assume_role_with_saml(RoleArn=None, PrincipalArn=None, SAMLAssertion=
    None, Policy=None, DurationSeconds=None):
    """
    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 AWS access without user-specific credentials or configuration. For a comparison of AssumeRoleWithSAML with the other APIs that produce temporary credentials, see Requesting Temporary Security Credentials and Comparing the AWS STS APIs 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 AWS services.
    The temporary security credentials are valid for the duration that you specified when calling AssumeRole , or until the time specified in the SAML authentication response's SessionNotOnOrAfter value, whichever is shorter. The duration can be from 900 seconds (15 minutes) to a maximum of 3600 seconds (1 hour). The default is 1 hour.
    The temporary security credentials created by AssumeRoleWithSAML can be used to make API calls to any AWS service with the following exception: you cannot call the STS service's GetFederationToken or GetSessionToken APIs.
    Optionally, you can pass an IAM access policy to this operation. If you choose not to pass a policy, the temporary security credentials that are returned by the operation have the permissions that are defined in the access policy of the role that is being assumed. If you pass a policy to this operation, the temporary security credentials that are returned by the operation have the permissions that are allowed by the intersection of both the access policy of the role that is being assumed, * and * the policy that you pass. This means that both policies must grant the permission for the action to be allowed. This gives you a way to further restrict the permissions for the resulting temporary security credentials. You cannot use the passed policy to grant permissions that are in excess of those allowed by the access policy of the role that is being assumed. For more information, see Permissions for AssumeRole, AssumeRoleWithSAML, and AssumeRoleWithWebIdentity in the IAM User Guide .
    Before your application can call AssumeRoleWithSAML , you must configure your SAML identity provider (IdP) to issue the claims required by AWS. Additionally, you must use AWS Identity and Access Management (IAM) to create a SAML provider entity in your AWS account that represents your identity provider, and create an IAM role that specifies this SAML provider in its trust policy.
    Calling AssumeRoleWithSAML does not require the use of AWS 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.
    For more information, see the following resources:
    See also: AWS API Documentation
    
    
    :example: response = client.assume_role_with_saml(
        RoleArn='string',
        PrincipalArn='string',
        SAMLAssertion='string',
        Policy='string',
        DurationSeconds=123
    )
    
    
    :type RoleArn: string
    :param RoleArn: [REQUIRED]
            The Amazon Resource Name (ARN) of the role that the caller is assuming.
            

    :type PrincipalArn: string
    :param PrincipalArn: [REQUIRED]
            The Amazon Resource Name (ARN) of the SAML provider in IAM that describes the IdP.
            

    :type SAMLAssertion: string
    :param SAMLAssertion: [REQUIRED]
            The base-64 encoded SAML authentication response provided by the IdP.
            For more information, see Configuring a Relying Party and Adding Claims in the Using IAM guide.
            

    :type Policy: string
    :param Policy: An IAM policy in JSON format.
            The policy parameter is optional. If you pass a policy, the temporary security credentials that are returned by the operation have the permissions that are allowed by both the access policy of the role that is being assumed, * and * the policy that you pass. This gives you a way to further restrict the permissions for the resulting temporary security credentials. You cannot use the passed policy to grant permissions that are in excess of those allowed by the access policy of the role that is being assumed. For more information, Permissions for AssumeRole, AssumeRoleWithSAML, and AssumeRoleWithWebIdentity in the IAM User Guide .
            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.
            Note
            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.
            

    :type DurationSeconds: integer
    :param DurationSeconds: The duration, in seconds, of the role session. The value can range from 900 seconds (15 minutes) to 3600 seconds (1 hour). By default, the value is set to 3600 seconds. An expiration can also be specified in the SAML authentication response's SessionNotOnOrAfter value. The actual expiration time is whichever value is shorter.
            Note
            This is separate from the duration of a console session that you might request using the returned credentials. The request to the federation endpoint for a console sign-in token takes a SessionDuration parameter that specifies the maximum length of the console session, separately from the DurationSeconds parameter on this API. For more information, see Enabling SAML 2.0 Federated Users to Access the AWS Management Console in the IAM User Guide .
            

    :rtype: dict
    :return: {
        'Credentials': {
            'AccessKeyId': 'string',
            'SecretAccessKey': 'string',
            'SessionToken': 'string',
            'Expiration': datetime(2015, 1, 1)
        },
        'AssumedRoleUser': {
            'AssumedRoleId': 'string',
            'Arn': 'string'
        },
        'PackedPolicySize': 123,
        'Subject': 'string',
        'SubjectType': 'string',
        'Issuer': 'string',
        'Audience': 'string',
        'NameQualifier': 'string'
    }
    
    
    :returns: 
    RoleArn (string) -- [REQUIRED]
    The Amazon Resource Name (ARN) of the role that the caller is assuming.
    
    PrincipalArn (string) -- [REQUIRED]
    The Amazon Resource Name (ARN) of the SAML provider in IAM that describes the IdP.
    
    SAMLAssertion (string) -- [REQUIRED]
    The base-64 encoded SAML authentication response provided by the IdP.
    For more information, see Configuring a Relying Party and Adding Claims in the Using IAM guide.
    
    Policy (string) -- An IAM policy in JSON format.
    The policy parameter is optional. If you pass a policy, the temporary security credentials that are returned by the operation have the permissions that are allowed by both the access policy of the role that is being assumed, * and * the policy that you pass. This gives you a way to further restrict the permissions for the resulting temporary security credentials. You cannot use the passed policy to grant permissions that are in excess of those allowed by the access policy of the role that is being assumed. For more information, Permissions for AssumeRole, AssumeRoleWithSAML, and AssumeRoleWithWebIdentity in the IAM User Guide .
    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.
    
    Note
    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.
    
    
    DurationSeconds (integer) -- The duration, in seconds, of the role session. The value can range from 900 seconds (15 minutes) to 3600 seconds (1 hour). By default, the value is set to 3600 seconds. An expiration can also be specified in the SAML authentication response's SessionNotOnOrAfter value. The actual expiration time is whichever value is shorter.
    
    Note
    This is separate from the duration of a console session that you might request using the returned credentials. The request to the federation endpoint for a console sign-in token takes a SessionDuration parameter that specifies the maximum length of the console session, separately from the DurationSeconds parameter on this API. For more information, see Enabling SAML 2.0 Federated Users to Access the AWS Management Console in the IAM User Guide .
    
    
    
    """
    pass
