As far as I can tell, the only justification for AWS IAM users that I hear nowadays is for usage on non-interactive systems outside of AWS, e.g. a Raspberry Pi in your closet. This repo uses the little-known
iot:AssumeRoleWithCertificate functionality to avoid that.
Specifically, it uses the "card authentication" slot on a Yubikey to store a TLS certificate and private key. This slot can be used to sign requests without a PIN or touch - perfect for the Raspberry Pi use case.
Can you think of any other use cases for IAM users? I'd love to hear them. Please open an issue on this repo and let me know!
# this command enrols the currently attached Yubikey as an identity that can # assume two IAM roles. --identity unique-name-for-this-identity \ --role role-name-that-can-be-assumed \ --role maybe-a-second-role-name-too # this command returns temporary IAM credentials in the format expected by the # aws cli and sdks. $ cloudkey credentials role-name-that-can-be-assumed # the above command is expected to be used in ~/.aws/config and look like the # following: # # [profile my-profile] # credential_process = cloudkey credentials
# # usage: $ aws s3 ls --profile my-profile