"shush" is a small tool that can be used to encrypt and decrypt secrets, using the AWS "Key Management Service" (KMS).
Encrypt secrets like this:
shush encrypt KEY-ID < secrets.txt > secrets.encrypted
Later, you can decrypt them:
shush decrypt < secrets.encrypted > secrets.txt
KEY-ID can be the id or ARN of a KMS master key, or alias prefixed by "alias/". See documentation on Encrypt for more details.
Appropriate AWS credentials must be provided by one of the mechanisms supported by aws-sdk-go, e.g. environment variables, or EC2 instance profile.
When used within EC2, shush selects the appropriate region automatically.
Outside EC2, you'll need to specify it, via --region or by setting $AWS_DEFAULT_REGION.
"shush" can only encrypt small amounts of data; up to 4 KB.
Binaries for official releases may be downloaded from the releases page on GitHub.
If you want to compile it from source, try:
$ go get github.com/realestate-com-au/shush
Encrypt user input:
echo -n "Enter password: "
ENCRYPTED_PASSWORD=$(shush encrypt alias/app-secrets)
and later:
some-command --password $(shush decrypt "$ENCRYPTED_PASSWORD")
Encrypt some environment variables, as though they were arguments to env(1):
shush encrypt alias/app-secrets 'FOO=1 BAR=2' > secrets
and later:
env $(shush decrypt < secrets) some-command
If you dislike 8Gb binary files, and happen to have a Ruby interpreter handy, "ssssh" is a drop-in replacement for "shush":
Or, you can just use bash, base64, and the AWS CLI:
base64 -d < secrets.encrypted > /tmp/secrets.bin
aws kms decrypt --ciphertext-blob fileb:///tmp/secrets.bin --output text --query Plaintext | base64 -d > secrets.txt
Copyright (c) 2015 REA Group Ltd.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Source-code for shush is on Github.