Temp AWS creds with MFA via Yubikey Oath.

aws_temp_creds.fish

#! /usr/bin/fish

function aws_temp_creds -a mfa_arn aws_acc_nos -d "Sets AWS temp credentials with MFA via a Yubikey."
    for i in (env | grep AWS | cut -f 1 -d "=")
        set -e $i
    end

    set -l MFA (yubioath show $aws_acc_nos | tail -c 7)
    count $MFA > /dev/null; or return 1

    set -l RES (aws sts get-session-token --duration 3600 --serial-number $mfa_arn --token-code $MFA --output text | awk '{printf "%s\n%s\n%s", $2, $4, $5}');
    count $RES > /dev/null; or return 1

    set -gx AWS_ACCESS_KEY_ID $RES[1]
    set -gx AWS_SECRET_ACCESS_KEY $RES[2]
    set -gx AWS_SESSION_TOKEN $RES[3]
    set -gx AWS_SECURITY_TOKEN $RES[3]

    echo -e "All set. Now using $RES[1].\n:D"
end