AWS Key Management Service

Learn how to manage encryption using AWS KMS

To enhance the security of your Infisical projects, you can now encrypt your secrets using an external Key Management Service (KMS). When external KMS is configured for your project, all encryption and decryption operations will be handled by the chosen KMS. This guide will walk you through the steps needed to configure external KMS support with AWS KMS.

Prerequisites

• An AWS KMS Key configured as a Symmetric key and with Encrypt and Decrypt key usage.

Before you begin, you’ll first need to choose a method of authentication with AWS from below.

Method 1: Assume Role (Recommended)

1. Create the Managing User IAM Role

   1. Navigate to the Create IAM Role page in your AWS Console.

   2. Select AWS Account as the Trusted Entity Type.

   3. Select Another AWS Account and provide the appropriate Infisical AWS Account ID: use 381492033652 for the US region, and 345594589636 for the EU region. This restricts the role to be assumed only by Infisical. If you are self-hosting, provide the AWS account number where Infisical is hosted.

   4. Optionally, enable Require external ID and enter your Infisical project ID to further enhance security.

2. Add Required Permissions for the IAM Role

   Use the following custom policy to grant the minimum permissions required by Infisical to integrate with AWS KMS

   {
     "Version": "2012-10-17",
     "Statement": [
       {
         "Sid": "AllowKMSAccess",
         "Effect": "Allow",
           "Action": [
             "kms:Decrypt",
             "kms:Encrypt",
             "kms:DescribeKey"
         ],
         "Resource": "*"
       }
     ]
   }
   

Setup AWS KMS in the Organization Settings

Next, you will need to follow the steps listed below to add AWS KMS for your organization.

1. Navigate to the organization settings and select the 'Encryption' tab.

   

2. Click on the 'Add' button

   Click the ‘Add’ button to begin adding a new external KMS.

3. Select 'AWS KMS'

   Choose ‘AWS KMS’ from the list of encryption providers.

4. Provide the inputs for AWS KMS

   Selecting AWS as the provider will require you input the following fields.

   Alias · string · required

   Name for referencing the AWS KMS key within the organization.

   Description · string

   Short description of the AWS KMS key.

   Authentication Mode · string · required

   Authentication mode for AWS, either “AWS Assume Role” or “Access Key”.

   IAM Role ARN For Role Assumption · string

   ARN of the AWS role to assume for providing Infisical access to the AWS KMS Key (required if Authentication Mode is “AWS Assume Role”)

   Assume Role External ID · string

   Custom identifier for additional validation during role assumption.

   Access Key ID · string

   AWS IAM Access Key ID for authentication (required if Authentication Mode is “Access Key”).

   Secret Access Key · string

   AWS IAM Secret Access Key for authentication (required if Authentication Mode is “Access Key”).

   AWS Region · string · required

   AWS region where the AWS KMS Key is located.

   AWS KMS Key ID · string

   Key ID of the AWS KMS Key. If left blank, Infisical will generate and use a new AWS KMS Key in the specified region.

5. Click Save

   Save your configuration to apply the settings.

You now have an AWS KMS Key configured at the organization level. You can assign these AWS KMS keys to existing Infisical projects by visiting the ‘Project Settings’ page.

Assign AWS KMS Key to an Existing Project

To assign the AWS KMS key you added to your organization, follow the steps below.

1. Open Project Settings and select to the Encryption Tab

   

2. Under the Key Management section, select your newly added AWS KMS key from the dropdown

   Choose the AWS KMS key you configured earlier.

3. Click Save

   Once you have selected the KMS of choice, click save.