Use PutUserPolicy with an AWS SDK or CLI

To attach a policy to an IAM user

The following put-user-policy command attaches a policy to the IAM user named Bob.

aws iam put-user-policy \
    --user-name Bob \
    --policy-name ExamplePolicy \
    --policy-document file://AdminPolicy.json

This command produces no output.

The policy is defined as a JSON document in the AdminPolicy.json file. (The file name and extension do not have significance.)

For more information, see Adding and removing IAM identity permissions in the AWS IAM User Guide.

import (
	"context"
	"encoding/json"
	"errors"
	"log"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/iam"
	"github.com/aws/aws-sdk-go-v2/service/iam/types"
	"github.com/aws/smithy-go"
)

// UserWrapper encapsulates user actions used in the examples.
// It contains an IAM service client that is used to perform user actions.
type UserWrapper struct {
	IamClient *iam.Client
}



// CreateUserPolicy adds an inline policy to a user. This example creates a policy that
// grants a list of actions on a specified role.
// PolicyDocument shows how to work with a policy document as a data structure and
// serialize it to JSON by using Go's JSON marshaler.
func (wrapper UserWrapper) CreateUserPolicy(ctx context.Context, userName string, policyName string, actions []string,
	roleArn string) error {
	policyDoc := PolicyDocument{
		Version: "2012-10-17",
		Statement: []PolicyStatement{{
			Effect:   "Allow",
			Action:   actions,
			Resource: aws.String(roleArn),
		}},
	}
	policyBytes, err := json.Marshal(policyDoc)
	if err != nil {
		log.Printf("Couldn't create policy document for %v. Here's why: %v\n", roleArn, err)
		return err
	}
	_, err = wrapper.IamClient.PutUserPolicy(ctx, &iam.PutUserPolicyInput{
		PolicyDocument: aws.String(string(policyBytes)),
		PolicyName:     aws.String(policyName),
		UserName:       aws.String(userName),
	})
	if err != nil {
		log.Printf("Couldn't create policy for user %v. Here's why: %v\n", userName, err)
	}
	return err
}

Example 1: This example creates an inline policy named EC2AccessPolicy and embeds it in the IAM user Bob. If an inline policy with the same name already exists, then it is overwritten. The JSON policy content comes from the file EC2AccessPolicy.json. Note that you must use the -Raw parameter to successfully process the content of the JSON file.

Write-IAMUserPolicy -UserName Bob -PolicyName EC2AccessPolicy -PolicyDocument (Get-Content -Raw EC2AccessPolicy.json)

  # Creates an inline policy for a specified user.
  # @param username [String] The name of the IAM user.
  # @param policy_name [String] The name of the policy to create.
  # @param policy_document [String] The JSON policy document.
  # @return [Boolean]
  def create_user_policy(username, policy_name, policy_document)
    @iam_client.put_user_policy({
                                  user_name: username,
                                  policy_name: policy_name,
                                  policy_document: policy_document
                                })
    @logger.info("Policy #{policy_name} created for user #{username}.")
    true
  rescue Aws::IAM::Errors::ServiceError => e
    @logger.error("Couldn't create policy #{policy_name} for user #{username}. Here's why:")
    @logger.error("\t#{e.code}: #{e.message}")
    false
  end

import AWSIAM
import AWSS3


    func putUserPolicy(policyDocument: String, policyName: String, user: IAMClientTypes.User) async throws {
        let input = PutUserPolicyInput(
            policyDocument: policyDocument,
            policyName: policyName,
            userName: user.userName
        )
        do {
            _ = try await iamClient.putUserPolicy(input: input)
        } catch {
            print("ERROR: putUserPolicy:", dump(error))
            throw error
        }
    }