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aws4 ---- [](http://travis-ci.org/mhart/aws4) A small utility to sign vanilla node.js http(s) request options using Amazon's [AWS Signature Version 4](http://docs.amazonwebservices.com/general/latest/gr/signature-version-4.html). Can also be used [in the browser](./browser). This signature is supported by nearly all Amazon services, including [S3](http://docs.aws.amazon.com/AmazonS3/latest/API/), [EC2](http://docs.aws.amazon.com/AWSEC2/latest/APIReference/), [DynamoDB](http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/API.html), [Kinesis](http://docs.aws.amazon.com/kinesis/latest/APIReference/), [Lambda](http://docs.aws.amazon.com/lambda/latest/dg/API_Reference.html), [SQS](http://docs.aws.amazon.com/AWSSimpleQueueService/latest/APIReference/), [SNS](http://docs.aws.amazon.com/sns/latest/api/), [IAM](http://docs.aws.amazon.com/IAM/latest/APIReference/), [STS](http://docs.aws.amazon.com/STS/latest/APIReference/), [RDS](http://docs.aws.amazon.com/AmazonRDS/latest/APIReference/), [CloudWatch](http://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/), [CloudWatch Logs](http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/), [CodeDeploy](http://docs.aws.amazon.com/codedeploy/latest/APIReference/), [CloudFront](http://docs.aws.amazon.com/AmazonCloudFront/latest/APIReference/), [CloudTrail](http://docs.aws.amazon.com/awscloudtrail/latest/APIReference/), [ElastiCache](http://docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/), [EMR](http://docs.aws.amazon.com/ElasticMapReduce/latest/API/), [Glacier](http://docs.aws.amazon.com/amazonglacier/latest/dev/amazon-glacier-api.html), [CloudSearch](http://docs.aws.amazon.com/cloudsearch/latest/developerguide/APIReq.html), [Elastic Load Balancing](http://docs.aws.amazon.com/ElasticLoadBalancing/latest/APIReference/), [Elastic Transcoder](http://docs.aws.amazon.com/elastictranscoder/latest/developerguide/api-reference.html), [CloudFormation](http://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/), [Elastic Beanstalk](http://docs.aws.amazon.com/elasticbeanstalk/latest/api/), [Storage Gateway](http://docs.aws.amazon.com/storagegateway/latest/userguide/AWSStorageGatewayAPI.html), [Data Pipeline](http://docs.aws.amazon.com/datapipeline/latest/APIReference/), [Direct Connect](http://docs.aws.amazon.com/directconnect/latest/APIReference/), [Redshift](http://docs.aws.amazon.com/redshift/latest/APIReference/), [OpsWorks](http://docs.aws.amazon.com/opsworks/latest/APIReference/), [SES](http://docs.aws.amazon.com/ses/latest/APIReference/), [SWF](http://docs.aws.amazon.com/amazonswf/latest/apireference/), [AutoScaling](http://docs.aws.amazon.com/AutoScaling/latest/APIReference/), [Mobile Analytics](http://docs.aws.amazon.com/mobileanalytics/latest/ug/server-reference.html), [Cognito Identity](http://docs.aws.amazon.com/cognitoidentity/latest/APIReference/), [Cognito Sync](http://docs.aws.amazon.com/cognitosync/latest/APIReference/), [Container Service](http://docs.aws.amazon.com/AmazonECS/latest/APIReference/), [AppStream](http://docs.aws.amazon.com/appstream/latest/developerguide/appstream-api-rest.html), [Key Management Service](http://docs.aws.amazon.com/kms/latest/APIReference/), [Config](http://docs.aws.amazon.com/config/latest/APIReference/), [CloudHSM](http://docs.aws.amazon.com/cloudhsm/latest/dg/api-ref.html), [Route53](http://docs.aws.amazon.com/Route53/latest/APIReference/requests-rest.html) and [Route53 Domains](http://docs.aws.amazon.com/Route53/latest/APIReference/requests-rpc.html). Indeed, the only AWS services that *don't* support v4 as of 2014-12-30 are [Import/Export](http://docs.aws.amazon.com/AWSImportExport/latest/DG/api-reference.html) and [SimpleDB](http://docs.aws.amazon.com/AmazonSimpleDB/latest/DeveloperGuide/SDB_API.html) (they only support [AWS Signature Version 2](https://github.com/mhart/aws2)). It also provides defaults for a number of core AWS headers and request parameters, making it very easy to query AWS services, or build out a fully-featured AWS library. Example ------- ```javascript var http = require('http'), https = require('https'), aws4 = require('aws4') // given an options object you could pass to http.request var opts = {host: 'sqs.us-east-1.amazonaws.com', path: '/?Action=ListQueues'} // alternatively (as aws4 can infer the host): opts = {service: 'sqs', region: 'us-east-1', path: '/?Action=ListQueues'} // alternatively (as us-east-1 is default): opts = {service: 'sqs', path: '/?Action=ListQueues'} aws4.sign(opts) // assumes AWS credentials are available in process.env console.log(opts) /* { host: 'sqs.us-east-1.amazonaws.com', path: '/?Action=ListQueues', headers: { Host: 'sqs.us-east-1.amazonaws.com', 'X-Amz-Date': '20121226T061030Z', Authorization: 'AWS4-HMAC-SHA256 Credential=ABCDEF/20121226/us-east-1/sqs/aws4_request, ...' } } */ // we can now use this to query AWS using the standard node.js http API http.request(opts, function(res) { res.pipe(process.stdout) }).end() /* <?xml version="1.0"?> <ListQueuesResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/"> ... */ ``` More options ------------ ```javascript // you can also pass AWS credentials in explicitly (otherwise taken from process.env) aws4.sign(opts, {accessKeyId: '', secretAccessKey: ''}) // can also add the signature to query strings aws4.sign({service: 's3', path: '/my-bucket?X-Amz-Expires=12345', signQuery: true}) // create a utility function to pipe to stdout (with https this time) function request(o) { https.request(o, function(res) { res.pipe(process.stdout) }).end(o.body || '') } // aws4 can infer the HTTP method if a body is passed in // method will be POST and Content-Type: 'application/x-www-form-urlencoded; charset=utf-8' request(aws4.sign({service: 'iam', body: 'Action=ListGroups&Version=2010-05-08'})) /* <ListGroupsResponse xmlns="https://iam.amazonaws.com/doc/2010-05-08/"> ... */ // can specify any custom option or header as per usual request(aws4.sign({ service: 'dynamodb', region: 'ap-southeast-2', method: 'POST', path: '/', headers: { 'Content-Type': 'application/x-amz-json-1.0', 'X-Amz-Target': 'DynamoDB_20120810.ListTables' }, body: '{}' })) /* {"TableNames":[]} ... */ // works with all other services that support Signature Version 4 request(aws4.sign({service: 's3', path: '/', signQuery: true})) /* <ListAllMyBucketsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> ... */ request(aws4.sign({service: 'ec2', path: '/?Action=DescribeRegions&Version=2014-06-15'})) /* <DescribeRegionsResponse xmlns="http://ec2.amazonaws.com/doc/2014-06-15/"> ... */ request(aws4.sign({service: 'sns', path: '/?Action=ListTopics&Version=2010-03-31'})) /* <ListTopicsResponse xmlns="http://sns.amazonaws.com/doc/2010-03-31/"> ... */ request(aws4.sign({service: 'sts', path: '/?Action=GetSessionToken&Version=2011-06-15'})) /* <GetSessionTokenResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/"> ... */ request(aws4.sign({service: 'cloudsearch', path: '/?Action=ListDomainNames&Version=2013-01-01'})) /* <ListDomainNamesResponse xmlns="http://cloudsearch.amazonaws.com/doc/2013-01-01/"> ... */ request(aws4.sign({service: 'ses', path: '/?Action=ListIdentities&Version=2010-12-01'})) /* <ListIdentitiesResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/"> ... */ request(aws4.sign({service: 'autoscaling', path: '/?Action=DescribeAutoScalingInstances&Version=2011-01-01'})) /* <DescribeAutoScalingInstancesResponse xmlns="http://autoscaling.amazonaws.com/doc/2011-01-01/"> ... */ request(aws4.sign({service: 'elasticloadbalancing', path: '/?Action=DescribeLoadBalancers&Version=2012-06-01'})) /* <DescribeLoadBalancersResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2012-06-01/"> ... */ request(aws4.sign({service: 'cloudformation', path: '/?Action=ListStacks&Version=2010-05-15'})) /* <ListStacksResponse xmlns="http://cloudformation.amazonaws.com/doc/2010-05-15/"> ... */ request(aws4.sign({service: 'elasticbeanstalk', path: '/?Action=ListAvailableSolutionStacks&Version=2010-12-01'})) /* <ListAvailableSolutionStacksResponse xmlns="http://elasticbeanstalk.amazonaws.com/docs/2010-12-01/"> ... */ request(aws4.sign({service: 'rds', path: '/?Action=DescribeDBInstances&Version=2012-09-17'})) /* <DescribeDBInstancesResponse xmlns="http://rds.amazonaws.com/doc/2012-09-17/"> ... */ request(aws4.sign({service: 'monitoring', path: '/?Action=ListMetrics&Version=2010-08-01'})) /* <ListMetricsResponse xmlns="http://monitoring.amazonaws.com/doc/2010-08-01/"> ... */ request(aws4.sign({service: 'redshift', path: '/?Action=DescribeClusters&Version=2012-12-01'})) /* <DescribeClustersResponse xmlns="http://redshift.amazonaws.com/doc/2012-12-01/"> ... */ request(aws4.sign({service: 'cloudfront', path: '/2014-05-31/distribution'})) /* <DistributionList xmlns="http://cloudfront.amazonaws.com/doc/2014-05-31/"> ... */ request(aws4.sign({service: 'elasticache', path: '/?Action=DescribeCacheClusters&Version=2014-07-15'})) /* <DescribeCacheClustersResponse xmlns="http://elasticache.amazonaws.com/doc/2014-07-15/"> ... */ request(aws4.sign({service: 'elasticmapreduce', path: '/?Action=DescribeJobFlows&Version=2009-03-31'})) /* <DescribeJobFlowsResponse xmlns="http://elasticmapreduce.amazonaws.com/doc/2009-03-31"> ... */ request(aws4.sign({service: 'route53', path: '/2013-04-01/hostedzone'})) /* <ListHostedZonesResponse xmlns="https://route53.amazonaws.com/doc/2013-04-01/"> ... */ request(aws4.sign({service: 'appstream', path: '/applications'})) /* {"_links":{"curie":[{"href":"http://docs.aws.amazon.com/appstream/latest/... ... */ request(aws4.sign({service: 'cognito-sync', path: '/identitypools'})) /* {"Count":0,"IdentityPoolUsages":[],"MaxResults":16,"NextToken":null} ... */ request(aws4.sign({service: 'elastictranscoder', path: '/2012-09-25/pipelines'})) /* {"NextPageToken":null,"Pipelines":[]} ... */ request(aws4.sign({service: 'lambda', path: '/2014-11-13/functions/'})) /* {"Functions":[],"NextMarker":null} ... */ request(aws4.sign({service: 'ecs', path: '/?Action=ListClusters&Version=2014-11-13'})) /* <ListClustersResponse xmlns="http://ecs.amazonaws.com/doc/2014-11-13/"> ... */ request(aws4.sign({service: 'glacier', path: '/-/vaults', headers: {'X-Amz-Glacier-Version': '2012-06-01'}})) /* {"Marker":null,"VaultList":[]} ... */ request(aws4.sign({service: 'storagegateway', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'StorageGateway_20120630.ListGateways' }})) /* {"Gateways":[]} ... */ request(aws4.sign({service: 'datapipeline', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'DataPipeline.ListPipelines' }})) /* {"hasMoreResults":false,"pipelineIdList":[]} ... */ request(aws4.sign({service: 'opsworks', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'OpsWorks_20130218.DescribeStacks' }})) /* {"Stacks":[]} ... */ request(aws4.sign({service: 'route53domains', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'Route53Domains_v20140515.ListDomains' }})) /* {"Domains":[]} ... */ request(aws4.sign({service: 'kinesis', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'Kinesis_20131202.ListStreams' }})) /* {"HasMoreStreams":false,"StreamNames":[]} ... */ request(aws4.sign({service: 'cloudtrail', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'CloudTrail_20131101.DescribeTrails' }})) /* {"trailList":[]} ... */ request(aws4.sign({service: 'logs', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'Logs_20140328.DescribeLogGroups' }})) /* {"logGroups":[]} ... */ request(aws4.sign({service: 'codedeploy', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'CodeDeploy_20141006.ListApplications' }})) /* {"applications":[]} ... */ request(aws4.sign({service: 'directconnect', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'OvertureService.DescribeConnections' }})) /* {"connections":[]} ... */ request(aws4.sign({service: 'kms', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'TrentService.ListKeys' }})) /* {"Keys":[],"Truncated":false} ... */ request(aws4.sign({service: 'config', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'StarlingDoveService.DescribeDeliveryChannels' }})) /* {"DeliveryChannels":[]} ... */ request(aws4.sign({service: 'cloudhsm', body: '{}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'CloudHsmFrontendService.ListAvailableZones' }})) /* {"AZList":["us-east-1a","us-east-1b","us-east-1c"]} ... */ request(aws4.sign({ service: 'swf', body: '{"registrationStatus":"REGISTERED"}', headers: { 'Content-Type': 'application/x-amz-json-1.0', 'X-Amz-Target': 'SimpleWorkflowService.ListDomains' } })) /* {"domainInfos":[]} ... */ request(aws4.sign({ service: 'cognito-identity', body: '{"MaxResults": 1}', headers: { 'Content-Type': 'application/x-amz-json-1.1', 'X-Amz-Target': 'AWSCognitoIdentityService.ListIdentityPools' } })) /* {"IdentityPools":[]} ... */ request(aws4.sign({ service: 'mobileanalytics', path: '/2014-06-05/events', body: JSON.stringify({events:[{ eventType: 'a', timestamp: new Date().toISOString(), session: {}, }]}), headers: { 'Content-Type': 'application/json', 'X-Amz-Client-Context': JSON.stringify({ client: {client_id: 'a', app_title: 'a'}, custom: {}, env: {platform: 'a'}, services: {}, }), } })) /* (HTTP 202, empty response) */ // Generate CodeCommit Git access password var signer = new aws4.RequestSigner({ service: 'codecommit', host: 'git-codecommit.us-east-1.amazonaws.com', method: 'GIT', path: '/v1/repos/MyAwesomeRepo', }) var password = signer.getDateTime() + 'Z' + signer.signature() ``` API --- ### aws4.sign(requestOptions, [credentials]) This calculates and populates the `Authorization` header of `requestOptions`, and any other necessary AWS headers and/or request options. Returns `requestOptions` as a convenience for chaining. `requestOptions` is an object holding the same options that the node.js [http.request](http://nodejs.org/docs/latest/api/http.html#http_http_request_options_callback) function takes. The following properties of `requestOptions` are used in the signing or populated if they don't already exist: - `hostname` or `host` (will be determined from `service` and `region` if not given) - `method` (will use `'GET'` if not given or `'POST'` if there is a `body`) - `path` (will use `'/'` if not given) - `body` (will use `''` if not given) - `service` (will be calculated from `hostname` or `host` if not given) - `region` (will be calculated from `hostname` or `host` or use `'us-east-1'` if not given) - `headers['Host']` (will use `hostname` or `host` or be calculated if not given) - `headers['Content-Type']` (will use `'application/x-www-form-urlencoded; charset=utf-8'` if not given and there is a `body`) - `headers['Date']` (used to calculate the signature date if given, otherwise `new Date` is used) Your AWS credentials (which can be found in your [AWS console](https://portal.aws.amazon.com/gp/aws/securityCredentials)) can be specified in one of two ways: - As the second argument, like this: ```javascript aws4.sign(requestOptions, { secretAccessKey: "<your-secret-access-key>", accessKeyId: "<your-access-key-id>", sessionToken: "<your-session-token>" }) ``` - From `process.env`, such as this: ``` export AWS_SECRET_ACCESS_KEY="<your-secret-access-key>" export AWS_ACCESS_KEY_ID="<your-access-key-id>" export AWS_SESSION_TOKEN="<your-session-token>" ``` (will also use `AWS_ACCESS_KEY` and `AWS_SECRET_KEY` if available) The `sessionToken` property and `AWS_SESSION_TOKEN` environment variable are optional for signing with [IAM STS temporary credentials](http://docs.aws.amazon.com/STS/latest/UsingSTS/using-temp-creds.html). Installation ------------ With [npm](http://npmjs.org/) do: ``` npm install aws4 ``` Can also be used [in the browser](./browser). Thanks ------ Thanks to [@jed](https://github.com/jed) for his [dynamo-client](https://github.com/jed/dynamo-client) lib where I first committed and subsequently extracted this code. Also thanks to the [official node.js AWS SDK](https://github.com/aws/aws-sdk-js) for giving me a start on implementing the v4 signature.