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Anne De Mare - read online full pdf

Decrypted Secrets

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When you create a secret, you can choose any symmetric encryption customer managed key in the AWS account and Region, or you can use the AWS managed key for Secrets Manager (aws/secretsmanager). In the console, if you choose the default value for the encryption key, Secrets Manager creates the AWS managed key aws/secretsmanager, if it doesn't already exist, and associates it with the secret. You can use the same KMS key or different KMS keys for each secret in your account. You might want to use different KMS keys to set custom permissions on the keys for a group of secrets, or if you want to audit particular operations for those keys. Secrets Manager supports only symmetric encryption KMS keys. If you use a KMS key in an external key store, cryptographic operations on the KMS key might take longer and be less reliable and durable because the request has to travel outside of AWS.

To find the KMS key associated with a secret, view the secret in the console or call ListSecrets or DescribeSecret. When the secret is associated with the AWS managed key for Secrets Manager (aws/secretsmanager), these operations do not return a KMS key identifier.

The key policy for the AWS managed key for Secrets Manager (aws/secretsmanager) gives users permission to use the KMS key for specified operations only when Secrets Manager makes the request on the user's behalf. The key policy does not allow any user to use the KMS key directly.

You can use AWS CloudTrail and Amazon CloudWatch Logs to track the requests that Secrets Manager sends to AWS KMS on your behalf. For information about monitoring the use of secrets, see Monitor AWS Secrets Manager secrets.

The event that records the GenerateDataKey operation is similar to the following example event. The request is invoked by The parameters include the Amazon Resource Name (ARN) of the KMS key for the secret, a key specifier that requires a 256-bit key, and the encryption context that identifies the secret and version.

One option to export secrets by accessing the secret values normally and then echoing them to a file using indirection. You could do this via bash commands directly in the workflow, via a shell script, etc. You could then save this file as an artifact, so that you can download it to your local machine.

The prod.decrypt.private.php file is highly sensitive. Your team of developersand even Continuous Integration services don't need that key. If thedecryption key has been exposed (ex-employee leaving for instance), youshould consider generating a new one by running:secrets:generate-keys --rotate.

Secret values can be referenced in the same way asenvironment variables. Be careful that you don'taccidentally define a secret and an environment variable with the same name:environment variables override secrets.

Most of the secrets commands - including secrets:set - have a --localoption that stores the "secret" in the .env.env.local file as a standardenvironment variable. To override the DATABASE_PASSWORD secret locally, run:

Symfony also provides the secrets:decrypt-to-local command which decryptsall secrets and stores them in the local vault and the secrets:encrypt-from-localcommand to encrypt all local secrets to the vault.

If you add a secret in the dev and prod environments, it will be missingfrom the test environment. You could create a "vault" for the testenvironment and define the secrets there. But an easier way is to set the testvalues via the .env.test file:

The secrets:generate-keys command provides a --rotate option toregenerate the cryptographic keys. Symfony will decrypt existing secrets withthe old key, generate new cryptographic keys and re-encrypt secrets with thenew key. In order to decrypt previous secrets, the developer must have thedecryption key.

And if you're wondering who exactly Mary is telling her secrets to in such securely encrypted memos, the answer is (mostly) Michel de Castelnau de Mauvissière, the French ambassador to Englan


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