Introduction

Small PowerShell script to automate the process of entering authenticated session tokens to run local aws cli commands. This PowerShell script was based upon a Windows 10 build.

Getting Started

1. aws cli already installed
   • Script assumes aws is installed in default $USER/.aws directory
2. The files from this repo:
   • mfa.ps1
   • aws_accounts.txt //need to update to your real account id's
3. AWS Account Key's
4. Assumed Role in AWS

Running

./mfa.ps1

Dependencies

mfa.ps1

Environment Variables

Environment variables need to be stored with the following names:

The values of the variables will match your default aws key's.

• AWS_ACCESS_KEY
• AWS_SECRET_ACCESS_KEY
• AWS_MFA_SERIAL

Assumed Role

• Change the line $ASSUME_ROLE = "MyRoleForCrossAccountAccess"to your proper assumed role in AWS.

Region

• I hard coded the region for my script to be us-west-1
  • Add-Content $AWS_CONFIG "region = us-west-1"// lines 70 & 100
  • At the time of this writing, AWS required a region to be set in the config. I may change this in a future update.

aws_accounts.txt

Text Formatting As Follows:

555551111222 ## FAKE ACCOUNT 1 ##
123456789012 ## FAKE ACCOUNT 2 ##

The script splits line by line by white space and stores first string into an array for further processing.