You can use your AWS account or IAM user security credentials to send authenticated requests to Amazon S3. This section provides examples of how you can send authenticated requests using the AWS SDK for Java, AWS SDK for .NET, and AWS SDK for PHP. For a list of available AWS SDKs, go to Sample Code and Libraries. Show
Each of these AWS SDKs uses an SDK-specific credentials provider chain to find and use credentials and perform actions on behalf of the credentials owner. What all these credentials provider chains have in common is that they all look for your local AWS credentials file. For more information, see the topics below: Topics
To create a local AWS credentials fileThe easiest way to configure credentials for your AWS SDKs is to use an AWS credentials file. If you use the AWS Command Line Interface (AWS CLI), you may already have a local AWS credentials file configured. Otherwise, use the following procedure to set up a credentials file:
Your shared credentials file is now configured on your local computer, and it's ready to be used with the AWS SDKs. Sending authenticated requests using the AWS SDKsUse the AWS SDKs to send authenticated requests.
You can use temporary security credentials to make programmatic requests for AWS resources using the AWS CLI or AWS API (using the AWS SDKs). The temporary credentials provide the same permissions as long-term security credentials, such as IAM user credentials. However, there are a few differences:
If you are using the AWS SDKs, the AWS Command Line Interface (AWS CLI), or the Tools for Windows PowerShell , the way to get and use temporary security credentials differs with the context. If you are running code, AWS CLI, or Tools for Windows PowerShell commands inside an EC2 instance, you can take advantage of roles for Amazon EC2. Otherwise, you can call an AWS STS API to get the temporary credentials, and then use them explicitly to make calls to AWS services. You can use AWS Security Token Service
(AWS STS) to create and provide trusted users with temporary security credentials that can control access to your AWS resources. For more information about AWS STS, see Temporary security credentials in IAM. AWS STS is a global service that has a default endpoint at Contents
Using temporary credentials in Amazon EC2 instancesIf you want to run AWS CLI commands or code inside an EC2 instance, the recommended way to get credentials is to use roles for Amazon EC2. You create an IAM role that specifies the permissions that you want to grant to applications that run on the EC2 instances. When you launch the instance, you associate the role with the instance. Applications, AWS CLI, and Tools for Windows PowerShell commands that run on the instance can then get automatic temporary security credentials from the instance metadata. You do not have to explicitly get the temporary security credentials. The AWS SDKs, AWS CLI, and Tools for Windows PowerShell automatically get the credentials from the EC2 instance metadata service and use them. The temporary credentials have the permissions that you define for the role that is associated with the instance. For more information and for examples, see the following:
Using temporary security credentials with the AWS SDKsTo use temporary security credentials in code, you programmatically call an AWS STS API like
For an example written in Python (using the AWS SDK for Python (Boto)), see Switching to an IAM role (AWS API).
This example shows how to call For details about how to call You must make sure that you get a new set of credentials before the old ones expire. In some SDKs, you can use a provider that manages the process of refreshing credentials for you; check the documentation for the SDK you're using. Using temporary security credentials with the AWS CLIYou can use temporary security credentials with the AWS CLI. This can be useful for testing policies. Using the AWS CLI, you can call an AWS STS API like
When the command is finished, you can extract the access key ID, secret access key, and session token from wherever you've routed it. You can do this either manually or by using a script. You can then assign these values to environment variables. When you run AWS CLI commands, the AWS CLI looks for credentials in a specific order—first in environment variables and then in the configuration file. Therefore, after you've put the temporary credentials into environment variables, the AWS CLI uses those credentials by default. (If you specify a The following example shows how you might set the environment variables for temporary security credentials and then call an AWS CLI command. Because no Linux
Windows
Using temporary security credentials with API operationsIf you're making direct HTTPS API requests to AWS, you can sign those requests with the temporary security credentials that you get from the AWS Security Token Service (AWS STS). To do this, you use the access key ID and secret access key that you receive from AWS STS. You use the access key ID and secret access key the same way you would use long-term credentials to sign a request. You also add to your API request the session token that
you receive from AWS STS. You add the session token to an HTTP header or to a query string parameter named More informationFor more information about using AWS STS with other AWS services, see the following links:
Which credentials allows programmatic access to AWS resources for use from the AWS CLI or the AWS API?You can use temporary security credentials to make programmatic requests for AWS resources using the AWS CLI or AWS API (using the AWS SDKs ). The temporary credentials provide the same permissions as long-term security credentials, such as IAM user credentials.
How do I get my AWS credentials programmatically?Sign in to the AWS Management Console and open the IAM console at https://console.aws.amazon.com/iam/ . In the navigation pane, choose Users. Choose the name of the user whose access keys you want to create, and then choose the Security credentials tab. In the Access keys section, choose Create access key.
Which of the following is used for programmatic access to AWS resources?However, if the resources that need programmatic access are running inside AWS, the best practice is to use IAM roles instead. An IAM role is a defined set of permissions—it's not associated with a specific user or group.
Which types of credentials can IAM user have to access AWS?You can access AWS in different ways depending on the user credentials:. Console password: A password that the user can type to sign in to interactive sessions such as the AWS Management Console. ... . Access keys: A combination of an access key ID and a secret access key.. |