awscli-login is an AWS CLI plugin that manages retrieving and rotating Amazon STS temporary credentials using SAML ECP for authentication with optional support for Duo.
Project description
Project Description
awscli-login is a plugin that allows retrieving temporary Amazon credentials by authenticating against a SAML Identity Provider (IdP).
Installation
The simplest way to install awscli-login plugin is to use pip:
$ pip install awscli-login
After the awscli-login has been installed run the following command to enable the plugin:
$ aws configure set plugins.login awscli_login
Getting Started
Before using awscli-login to retrieve temporary credentials it is necessary to configure one or more profiles for use with the plugin. To configure this plugin you must know the URL of the ECP Endpoint for your IdP. If you do not have this information contact your IdP administrator.
Here is an example configuring the default profile for use with the University of Illinois at Urbana-Champaign’s IdP:
$ aws login configure ECP Endpoint URL [None]: https://shibboleth.illinois.edu/idp/profile/SAML2/SOAP/ECP Username [None]: Enable Keyring [False]: Duo Factor [None]: Role ARN [None]:
To login type the following command:
$ aws login Username [username]: netid Password: ******** Factor: passcode Code: 123456789
The username and password prompted for are the values needed to authenticate against the IdP configured for the selected profile. Factor is only required if your IdP requires Duo for authentication. If it does not then leave Factor blank. If your IdP does require Duo then Factor may be one of auto, push, passcode, sms, or phone. If left blank auto is the default. Code is a Duo code useful for use with a YubiKey, SMS codes, or other one-time use Duo codes.
If you have access to more than role you will be prompted to choice a role. For example:
$ aws login Username [username]: netid Password: ******** Factor: Please choose the role you would like to assume: Account: 978517677611 [ 0 ]: Admin Account: 520135271718 [ 1 ]: ReadOnlyUser [ 2 ]: S3Admin Selection: 2
To switch roles first logout, then login again selecting a different role, note that if you login to the same IdP using the same username then you will not be prompted for your password or Duo factor until the IdP session expires:
$ aws logout $ aws login Username [netid]: Please choose the role you would like to assume: Account: 520135271718 [ 0 ]: TestUser [ 1 ]: IAMUser Selection: 0
Advanced Example
It is possible to be logged in to more than one role at the same time using multiple profiles. For example consider the following configuration involving two profiles one called prod and the other test:
$ aws --profile prod login configure ECP Endpoint URL [None]: https://shibboleth.illinois.edu/idp/profile/SAML2/SOAP/ECP Username [None]: netid Enable Keyring [False]: True Duo Factor [None]: auto Role ARN [None]: arn:aws:iam::999999999999:role/Admin $ aws --profile test login configure ECP Endpoint URL [None]: https://shibboleth.illinois.edu/idp/profile/SAML2/SOAP/ECP Username [None]: netid Enable Keyring [False]: True Duo Factor [None]: passcode Role ARN [None]: arn:aws:iam::111111111111:role/Admin
This example involves several advanced features. First we are setting the username, factor, and role this means that we will not be prompted for this information when logging into these two profiles. In addition, we are using a Keyring. On the first login using one of the profiles the user will be prompted for his password but on subsequent logins the user will not be prompted for his password because it has been stored in a secure keyring.
For example when we initially login to prod:
$ export AWS_PROFILE=test $ aws login Password: ******** Code: 123456789
We are only prompted for the password and code. The password because this is the initial login, the code because this profile is configured for use with a passcode device such as a YubiKey. Now when we login in to test we are prompted for nothing:
$ aws --profile prod login
Even if the IdP session has expired in this case we will not be prompted for a password because it is stored in the Keyring. The user will receive either a phone call or a push to the default device configured for Duo to permit authenticating.
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