aws-okta

README

aws-okta

aws-okta allows you to authenticate with AWS using your Okta credentials.

Installing

You can install with:

$ go get github.com/segmentio/aws-okta

Usage

Adding Okta credentials

$ aws-okta add

This will prompt you for your Okta organization, username, and password. These credentials will then be stored in your keyring for future use.

Exec

$ aws-okta exec <profile> -- <command>

Exec will assume the role specified by the given aws config profile and execute a command with the proper environment variables set. This command is a drop-in replacement for aws-vault exec and accepts all of the same command line flags:

$ aws-okta help exec
exec will run the command specified with aws credentials set in the environment

Usage:
  aws-okta exec <profile> -- <command>

Flags:
  -a, --assume-role-ttl duration   Expiration time for assumed role (default 15m0s)
  -h, --help                       help for exec
  -t, --session-ttl duration       Expiration time for okta role session (default 1h0m0s)

Global Flags:
  -b, --backend string   Secret backend to use [kwallet secret-service file] (default "file")
  -d, --debug            Enable debug logging

Configuring your aws config

aws-okta assumes that your base role is one that has been configured for Okta's SAML integration by your Okta admin. Okta provides a guide for setting up that integration here. During that configuration, your admin should be able to grab the AWS App Embed URL from the General tab of the AWS application in your Okta org. You will need to set that value in your ~/.aws/config file, for example:

[okta]
aws_saml_url = home/amazon_aws/0ac4qfegf372HSvKF6a3/965

Next, you need to set up your base Okta role. This will be one your admin created while setting up the integration. It should be specified like any other aws profile:

[profile okta-dev]
role_arn = arn:aws:iam::<account-id>:role/<okta-role-name>
region = <region>

Your setup may require additional roles to be configured if your admin has set up a more complicated role scheme like cross account roles. For more details on the authentication process, see the internals section.

Backends

We use 99design's keyring package that they use in aws-vault. Because of this, you can choose between different pluggable secret storage backends just like in aws-vault. You can either set your backend from the command line as a flag, or set the AWS_OKTA_BACKEND environment variable.

Internals

Authentication process

We use the following multiple step authentication:

• Step 1 : Basic authentication against Okta
• Step 2 : MFA challenge if required
• Step 3 : Get AWS SAML assertion from Okta
• Step 4 : Assume base okta role from profile with the SAML Assertion
• Step 5 : Assume the requested AWS Role from the targeted AWS account to generate STS credentials