A simple tool that will help you enable MFA Delete feature on your S3 bucket

mfa-delete-enable.rb

#!/usr/bin/env ruby
require 'aws-sdk-v1'
 
print "S3 bucket name: "
bucket_name = STDIN.gets.chomp
print "AWS Access Key ID: "
aws_id      = STDIN.gets.chomp
print "AWS Access Secret Key: "
aws_key     = STDIN.gets.chomp
print "AWS Root MFA Serial: "
mfa_serial  = STDIN.gets.chomp
print "AWS Root MFA Token: "
mfa_token   = STDIN.gets.chomp
print "AWS Endpoint (s3.amazonaws.com): "
s3_endpoint = STDIN.gets.chomp
s3_endpoint = "s3.amazonaws.com" if s3_endpoint.length == 0
 
s3 = AWS::S3.new({
  :s3_endpoint => s3_endpoint,
  :access_key_id => aws_id,
  :secret_access_key => aws_key
})
 
bucket = s3.buckets[bucket_name]
bucket.enable_versioning :mfa_delete=>'Enabled', :mfa=>"#{mfa_serial} #{mfa_token}"