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Make Identity Pool / IAM authorization optional, fall back to JWT authorization if not provided #31

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Make Identity Pool / IAM authorization optional, fall back to JWT authorization if not provided #31

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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,7 @@ This command takes the following options:
The Cognito User Pool region. Defaults to `us-east-1`.

- `identity-pool-id`
The Cognito Identity Pool Id.
Optional Cognito Identity Pool Id. If provided, attempt to use IAM authorisation, else fall back to JWT authorisation.

- `invoke-url`
The API Gateway root endpoint.
Expand Down
75 changes: 51 additions & 24 deletions index.js
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Expand Up @@ -37,7 +37,7 @@ var argv = require("yargs")
})
.option("identity-pool-id", {
describe: "Cognito identity pool id",
demandOption: true
demandOption: false
})
.option("invoke-url", {
describe: "API Gateway URL",
Expand Down Expand Up @@ -128,42 +128,60 @@ function authenticate(callback) {
}

function getCredentials(userTokens, callback) {
console.log("Getting temporary credentials");

var logins = {};
var idToken = userTokens.idToken;
var accessToken = userTokens.accessToken;
if (!argv.identityPoolId) {

logins[
"cognito-idp." + argv.cognitoRegion + ".amazonaws.com/" + argv.userPoolId
] = idToken;
console.log("No Identity Pool provided, using JWT Authorization");
callback(userTokens);

AWS.config.credentials = new AWS.CognitoIdentityCredentials({
IdentityPoolId: argv.identityPoolId,
Logins: logins
});
} else {

console.log("Getting temporary IAM credentials");

var logins = {};
var idToken = userTokens.idToken;
var accessToken = userTokens.accessToken;

logins[
"cognito-idp." + argv.cognitoRegion + ".amazonaws.com/" + argv.userPoolId
] = idToken;

AWS.config.credentials = new AWS.CognitoIdentityCredentials({
IdentityPoolId: argv.identityPoolId,
Logins: logins
});

AWS.config.credentials.get(function(err) {
if (err) {
console.log(err.message ? err.message : err);
return;
}

callback(userTokens);
});

AWS.config.credentials.get(function(err) {
if (err) {
console.log(err.message ? err.message : err);
return;
}
}

callback(userTokens);
});
}

function makeRequest(userTokens) {
console.log("Making API request");

var apigClient = apigClientFactory.newClient({
// Base params
let apigClientParams = {
apiKey: argv.apiKey,
accessKey: AWS.config.credentials.accessKeyId,
secretKey: AWS.config.credentials.secretAccessKey,
sessionToken: AWS.config.credentials.sessionToken,
region: argv.apiGatewayRegion,
invokeUrl: argv.invokeUrl
});
}

// Optional IAM params
if (argv.identityPoolId) {
apigClientParams.accessKey = AWS.config.credentials.accessKeyId;
apigClientParams.secretKey = AWS.config.credentials.secretAccessKey;
apigClientParams.sessionToken = AWS.config.credentials.sessionToken;
}

var apigClient = apigClientFactory.newClient(apigClientParams);

var params = JSON.parse(argv.params);
var additionalParams = JSON.parse(argv.additionalParams);
Expand All @@ -189,6 +207,15 @@ function makeRequest(userTokens) {
);
}

// Add authorization header if no Identity Pool Provided
if (!argv.identityPoolId) {
additionalParams.headers = Object.assign(
{},
additionalParams.headers,
{"Authorization": `Bearer ${userTokens.idToken}`},
);
}

apigClient
.invokeApi(params, argv.pathTemplate, argv.method, additionalParams, body)
.then(function(result) {
Expand Down