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