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Rename AWS IAM auth to AWS Auth with IAM type
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Tuan Dang
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docs/documentation/platform/identities/aws-auth.mdx
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278
docs/documentation/platform/identities/aws-auth.mdx
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---
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title: AWS Auth
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description: "Learn how to authenticate with Infisical for EC2 instances, Lambda functions, and other IAM principals."
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---
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**AWS Auth** is an AWS-native authentication method for IAM principals like EC2 instances or Lambda functions to access Infisical.
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## Concept
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At a high-level, Infisical authenticates an IAM principal by verifying its identity and checking that it meets specific requirements (e.g. it is an allowed IAM principal ARN) at the `/api/v1/auth/aws-auth/login` endpoint. If successful,
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then Infisical returns a short-lived access token that can be used to make authenticated requests to the Infisical API.
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In AWS Auth, an IAM principal signs a `GetCallerIdentity` query using the [AWS Signature v4 algorithm](https://docs.aws.amazon.com/IAM/latest/UserGuide/create-signed-request.html); this is done using the credentials from the AWS environment where the IAM principal is running.
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The query data including the request method, request body, and request headers are sent to Infisical afterwhich Infisical forwards the signed query to AWS STS API via the [sts:GetCallerIdentity](https://docs.aws.amazon.com/STS/latest/APIReference/API_GetCallerIdentity.html) method to verify and obtain the identity of the IAM principal.
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Once obtained, the identity information is verified against specified requirements such as if the associated IAM principal ARN is allowed to authenticate with Infisical. If all is well, Infisical returns a short-lived access token that can be used to make authenticated requests to the Infisical API.
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<Note>
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We recommend using one of Infisical's clients like SDKs or the Infisical Agent
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to authenticate with Infisical using AWS Auth as they handle the
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authentication process including the signed `GetCallerIdentity` query
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construction for you.
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Also, note that Infisical needs network-level access to send requests to the AWS STS API
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as part of the AWS Auth workflow.
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</Note>
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## Workflow
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In the following steps, we explore how to create and use identities for your workloads and applications on AWS to
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access the Infisical API using the AWS Auth authentication method.
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<Steps>
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<Step title="Creating an identity">
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To create an identity, head to your Organization Settings > Access Control > Machine Identities and press **Create identity**.
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When creating an identity, you specify an organization level [role](/documentation/platform/role-based-access-controls) for it to assume; you can configure roles in Organization Settings > Access Control > Organization Roles.
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Now input a few details for your new identity. Here's some guidance for each field:
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- Name (required): A friendly name for the identity.
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- Role (required): A role from the **Organization Roles** tab for the identity to assume. The organization role assigned will determine what organization level resources this identity can have access to.
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Once you've created an identity, you'll be prompted to configure the authentication method for it. Here, select **AWS Auth**.
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Here's some more guidance on each field:
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- Allowed Principal ARNs: A comma-separated list of trusted IAM principal ARNs that are allowed to authenticate with Infisical. The values should take one of three forms: `arn:aws:iam::123456789012:user/MyUserName`, `arn:aws:iam::123456789012:role/MyRoleName`, or `arn:aws:iam::123456789012:*`. Using a wildcard in this case allows any IAM principal in the account `123456789012` to authenticate with Infisical under the identity.
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- Allowed Account IDs: A comma-separated list of trusted AWS account IDs that are allowed to authenticate with Infisical.
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- STS Endpoint (default is `https://sts.amazonaws.com/`): The endpoint URL for the AWS STS API. This is useful for AWS GovCloud or other AWS regions that have different STS endpoints.
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- Access Token TTL (default is `2592000` equivalent to 30 days): The lifetime for an acccess token in seconds. This value will be referenced at renewal time.
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- Access Token Max TTL (default is `2592000` equivalent to 30 days): The maximum lifetime for an acccess token in seconds. This value will be referenced at renewal time.
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- Access Token Max Number of Uses (default is `0`): The maximum number of times that an access token can be used; a value of `0` implies infinite number of uses.
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- Access Token Trusted IPs: The IPs or CIDR ranges that access tokens can be used from. By default, each token is given the `0.0.0.0/0`, allowing usage from any network address.
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</Step>
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<Step title="Adding an identity to a project">
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To enable the identity to access project-level resources such as secrets within a specific project, you should add it to that project.
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To do this, head over to the project you want to add the identity to and go to Project Settings > Access Control > Machine Identities and press **Add identity**.
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Next, select the identity you want to add to the project and the project level role you want to allow it to assume. The project role assigned will determine what project level resources this identity can have access to.
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</Step>
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<Step title="Accessing the Infisical API with the identity">
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To access the Infisical API as the identity, you need to construct a signed `GetCallerIdentity` query using the [AWS Signature v4 algorithm](https://docs.aws.amazon.com/IAM/latest/UserGuide/create-signed-request.html) and make a request to the `/api/v1/auth/aws-auth/login` endpoint containing the query data
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in exchange for an access token.
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We provide a few code examples below of how you can authenticate with Infisical from inside a Lambda function, EC2 instance, etc. and obtain an access token to access the [Infisical API](/api-reference/overview/introduction).
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<AccordionGroup>
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<Accordion
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title="Sample code for inside a Lambda function"
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>
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The following query construction is an example of how you can authenticate with Infisical from inside a Lambda function.
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The shown example uses Node.js but you can use other languages supported by AWS Lambda.
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```javascript
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import AWS from "aws-sdk";
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import axios from "axios";
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export const handler = async (event, context) => {
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try {
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const region = process.env.AWS_REGION;
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AWS.config.update({ region });
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const iamRequestURL = `https://sts.${region}.amazonaws.com/`;
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const iamRequestBody = "Action=GetCallerIdentity&Version=2011-06-15";
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const iamRequestHeaders = {
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"Content-Type": "application/x-www-form-urlencoded; charset=utf-8",
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Host: `sts.${region}.amazonaws.com`,
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};
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// Create the request
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const request = new AWS.HttpRequest(iamRequestURL, region);
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request.method = "POST";
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request.headers = iamRequestHeaders;
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request.headers["X-Amz-Date"] = AWS.util.date
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.iso8601(new Date())
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.replace(/[:-]|\.\d{3}/g, "");
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request.body = iamRequestBody;
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request.headers["Content-Length"] =
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Buffer.byteLength(iamRequestBody).toString();
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// Sign the request
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const signer = new AWS.Signers.V4(request, "sts");
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signer.addAuthorization(AWS.config.credentials, new Date());
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const infisicalUrl = "https://app.infisical.com"; // or your self-hosted Infisical URL
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const identityId = "<your-identity-id>";
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const { data } = await axios.post(
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`${infisicalUrl}/api/v1/auth/aws-auth/login`,
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{
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identityId,
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iamHttpRequestMethod: "POST",
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iamRequestUrl: Buffer.from(iamRequestURL).toString("base64"),
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iamRequestBody: Buffer.from(iamRequestBody).toString("base64"),
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iamRequestHeaders: Buffer.from(
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JSON.stringify(iamRequestHeaders)
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).toString("base64"),
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}
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);
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console.log("result data: ", data); // access token here
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} catch (err) {
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console.error(err);
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}
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};
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````
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</Accordion>
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<Accordion
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title="Sample code for inside an EC2 instance"
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>
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The following query construction is an example of how you can authenticate with Infisical from inside a EC2 instance.
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The shown example uses Node.js but you can use other language you wish.
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```javascript
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import AWS from "aws-sdk";
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import axios from "axios";
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const main = async () => {
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try {
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// obtain region from EC2 instance metadata
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const tokenResponse = await axios.put("http://169.254.169.254/latest/api/token", null, {
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headers: {
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"X-aws-ec2-metadata-token-ttl-seconds": "21600"
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}
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});
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const url = "http://169.254.169.254/latest/dynamic/instance-identity/document";
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const response = await axios.get(url, {
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headers: {
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"X-aws-ec2-metadata-token": tokenResponse.data
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}
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});
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const region = response.data.region;
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AWS.config.update({
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region
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});
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const iamRequestURL = `https://sts.${region}.amazonaws.com/`;
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const iamRequestBody = "Action=GetCallerIdentity&Version=2011-06-15";
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const iamRequestHeaders = {
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"Content-Type": "application/x-www-form-urlencoded; charset=utf-8",
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Host: `sts.${region}.amazonaws.com`
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};
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const request = new AWS.HttpRequest(new AWS.Endpoint(iamRequestURL), AWS.config.region);
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request.method = "POST";
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request.headers = iamRequestHeaders;
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request.headers["X-Amz-Date"] = AWS.util.date.iso8601(new Date()).replace(/[:-]|\.\d{3}/g, "");
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request.body = iamRequestBody;
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request.headers["Content-Length"] = Buffer.byteLength(iamRequestBody);
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const signer = new AWS.Signers.V4(request, "sts");
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signer.addAuthorization(AWS.config.credentials, new Date());
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const infisicalUrl = "https://app.infisical.com"; // or your self-hosted Infisical URL
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const identityId = "<your-identity-id>";
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const { data } = await axios.post(`${infisicalUrl}/api/v1/auth/aws-auth/login`, {
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identityId,
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iamHttpRequestMethod: "POST",
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iamRequestUrl: Buffer.from(iamRequestURL).toString("base64"),
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iamRequestBody: Buffer.from(iamRequestBody).toString("base64"),
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iamRequestHeaders: Buffer.from(JSON.stringify(iamRequestHeaders)).toString("base64")
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});
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console.log("result data: ", data); // access token here
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} catch (err) {
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console.error(err);
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}
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}
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main();
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````
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</Accordion>
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<Accordion
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title="Sample code for general query construction"
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>
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The following query construction provides a generic example of how you can construct a signed `GetCallerIdentity` query and obtain the required payload components.
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The shown example uses Node.js but you can use any language you wish.
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```javascript
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const AWS = require("aws-sdk");
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const region = "<your-aws-region>";
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const infisicalUrl = "https://app.infisical.com"; // or your self-hosted Infisical URL
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const iamRequestURL = `https://sts.${region}.amazonaws.com/`;
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const iamRequestBody = "Action=GetCallerIdentity&Version=2011-06-15";
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const iamRequestHeaders = {
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"Content-Type": "application/x-www-form-urlencoded; charset=utf-8",
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Host: `sts.${region}.amazonaws.com`
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};
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const request = new AWS.HttpRequest(new AWS.Endpoint(iamRequestURL), region);
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request.method = "POST";
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request.headers = iamRequestHeaders;
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request.headers["X-Amz-Date"] = AWS.util.date.iso8601(new Date()).replace(/[:-]|\.\d{3}/g, "");
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request.body = iamRequestBody;
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request.headers["Content-Length"] = Buffer.byteLength(iamRequestBody);
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````
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#### Sample request
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```bash Request
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curl --location --request POST 'https://app.infisical.com/api/v1/auth/aws-auth/login' \
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--header 'Content-Type: application/x-www-form-urlencoded' \
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--data-urlencode 'identityId=...' \
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--data-urlencode 'iamHttpRequestMethod=...' \
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--data-urlencode 'iamRequestBody=...' \
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--data-urlencode 'iamRequestHeaders=...'
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```
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#### Sample response
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```bash Response
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{
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"accessToken": "...",
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"expiresIn": 7200,
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"accessTokenMaxTTL": 43244
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"tokenType": "Bearer"
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}
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```
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Next, you can use the access token to access the [Infisical API](/api-reference/overview/introduction)
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</Accordion>
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</AccordionGroup>
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<Tip>
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We recommend using one of Infisical's clients like SDKs or the Infisical Agent to authenticate with Infisical using AWS Auth as they handle the authentication process including the signed `GetCallerIdentity` query construction for you.
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</Tip>
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<Note>
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Each identity access token has a time-to-live (TLL) which you can infer from the response of the login operation;
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the default TTL is `7200` seconds which can be adjusted.
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If an identity access token expires, it can no longer authenticate with the Infisical API. In this case,
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a new access token should be obtained by performing another login operation.
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</Note>
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</Step>
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</Steps>
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