Secrets Management on AWS with S3 and KMS using Golang
Learning golang at the moment and wanted a easy and cheap way to store encrypted application secrets on S3.
What does it do
The cli tool allows you to:
- encrypt a string to a S3 path styled key eg.
- gets encrypted with your KMS key
- stores the data on S3 with Server Side Encryption (SSE).
- when the key is downloaded from S3 directly, the data will be in a encrypted form making it unusable.
- when using the tool's get method, it will decrypt using the kms key and return the secret to stdout.
- authentication: iam roles/users
As it can be run from a binary, it makes it easy to read application secrets.
Build a binary:
$ go build -o secretstore main.go
Store your database username as a secret to
$ ./secretstore -put -secretName=secrets/production/db.domain.com/username -secretValue=rds_admin
Read the database username from the secret:
$ ./secretstore -get -secretName=secrets/production/db.domain.com/username rds_admin
Read the S3 key directly using the cli:
$ aws --profile test s3 cp s3://<your_s3_bucket>/secrets/production/db.domain.com/username ./username $ cat ./username 0x3W[encrypted_data]9231Pw2 ...