Use GetPolicy with an Amazon SDK or command line tool

    /// <summary>
    /// Get information about an IAM policy.
    /// </summary>
    /// <param name="policyArn">The IAM policy to retrieve information for.</param>
    /// <returns>The IAM policy.</returns>
    public async Task<ManagedPolicy> GetPolicyAsync(string policyArn)
    {

        var response = await _IAMService.GetPolicyAsync(new GetPolicyRequest { PolicyArn = policyArn });
        return response.Policy;
    }

bool AwsDoc::IAM::getPolicy(const Aws::String &policyArn,
                            const Aws::Client::ClientConfiguration &clientConfig) {
    Aws::IAM::IAMClient iam(clientConfig);
    Aws::IAM::Model::GetPolicyRequest request;
    request.SetPolicyArn(policyArn);

    auto outcome = iam.GetPolicy(request);
    if (!outcome.IsSuccess()) {
        std::cerr << "Error getting policy " << policyArn << ": " <<
                  outcome.GetError().GetMessage() << std::endl;
    }
    else {
        const auto &policy = outcome.GetResult().GetPolicy();
        std::cout << "Name: " << policy.GetPolicyName() << std::endl <<
                  "ID: " << policy.GetPolicyId() << std::endl << "Arn: " <<
                  policy.GetArn() << std::endl << "Description: " <<
                  policy.GetDescription() << std::endl << "CreateDate: " <<
                  policy.GetCreateDate().ToGmtString(Aws::Utils::DateFormat::ISO_8601)
                  << std::endl;
    }

    return outcome.IsSuccess();
}

To retrieve information about the specified managed policy

This example returns details about the managed policy whose ARN is arn:aws:iam::123456789012:policy/MySamplePolicy.

aws iam get-policy \
    --policy-arn arn:aws:iam::123456789012:policy/MySamplePolicy

Output:

{
    "Policy": {
        "PolicyName": "MySamplePolicy",
        "CreateDate": "2015-06-17T19:23;32Z",
        "AttachmentCount": 0,
        "IsAttachable": true,
        "PolicyId": "Z27SI6FQMGNQ2EXAMPLE1",
        "DefaultVersionId": "v1",
        "Path": "/",
        "Arn": "arn:aws:iam::123456789012:policy/MySamplePolicy",
        "UpdateDate": "2015-06-17T19:23:32Z"
    }
}

For more information, see Policies and permissions in IAM in the Amazon IAM User Guide.

// PolicyWrapper encapsulates AWS Identity and Access Management (IAM) policy actions
// used in the examples.
// It contains an IAM service client that is used to perform policy actions.
type PolicyWrapper struct {
	IamClient *iam.Client
}



// GetPolicy gets data about a policy.
func (wrapper PolicyWrapper) GetPolicy(policyArn string) (*types.Policy, error) {
	var policy *types.Policy
	result, err := wrapper.IamClient.GetPolicy(context.TODO(), &iam.GetPolicyInput{
		PolicyArn: aws.String(policyArn),
	})
	if err != nil {
		log.Printf("Couldn't get policy %v. Here's why: %v\n", policyArn, err)
	} else {
		policy = result.Policy
	}
	return policy, err
}

Get the policy.

import { GetPolicyCommand, IAMClient } from "@aws-sdk/client-iam";

const client = new IAMClient({});

/**
 *
 * @param {string} policyArn
 */
export const getPolicy = (policyArn) => {
  const command = new GetPolicyCommand({
    PolicyArn: policyArn,
  });

  return client.send(command);
};

// Load the AWS SDK for Node.js
var AWS = require("aws-sdk");
// Set the region
AWS.config.update({ region: "REGION" });

// Create the IAM service object
var iam = new AWS.IAM({ apiVersion: "2010-05-08" });

var params = {
  PolicyArn: "arn:aws:iam::aws:policy/AWSLambdaExecute",
};

iam.getPolicy(params, function (err, data) {
  if (err) {
    console.log("Error", err);
  } else {
    console.log("Success", data.Policy.Description);
  }
});

suspend fun getIAMPolicy(policyArnVal: String?) {

    val request = GetPolicyRequest {
        policyArn = policyArnVal
    }

    IamClient { region = "AWS_GLOBAL" }.use { iamClient ->
        val response = iamClient.getPolicy(request)
        println("Successfully retrieved policy ${response.policy?.policyName}")
    }
}

$uuid = uniqid();
$service = new IAMService();

    public function getPolicy($policyArn)
    {
        return $this->customWaiter(function () use ($policyArn) {
            return $this->iamClient->getPolicy(['PolicyArn' => $policyArn]);
        });
    }

Example 1: This example returns details about the managed policy whose ARN is arn:aws:iam::123456789012:policy/MySamplePolicy.

Get-IAMPolicy -PolicyArn arn:aws:iam::123456789012:policy/MySamplePolicy

Output:

Arn              : arn:aws:iam::aws:policy/MySamplePolicy
AttachmentCount  : 0
CreateDate       : 2/6/2015 10:40:08 AM
DefaultVersionId : v1
Description      : 
IsAttachable     : True
Path             : /
PolicyId         : Z27SI6FQMGNQ2EXAMPLE1
PolicyName       : MySamplePolicy
UpdateDate       : 2/6/2015 10:40:08 AM

def get_default_policy_statement(policy_arn):
    """
    Gets the statement of the default version of the specified policy.

    :param policy_arn: The ARN of the policy to look up.
    :return: The statement of the default policy version.
    """
    try:
        policy = iam.Policy(policy_arn)
        # To get an attribute of a policy, the SDK first calls get_policy.
        policy_doc = policy.default_version.document
        policy_statement = policy_doc.get("Statement", None)
        logger.info("Got default policy doc for %s.", policy.policy_name)
        logger.info(policy_doc)
    except ClientError:
        logger.exception("Couldn't get default policy statement for %s.", policy_arn)
        raise
    else:
        return policy_statement

  # Fetches an IAM policy by its ARN
  # @param policy_arn [String] the ARN of the IAM policy to retrieve
  # @return [Aws::IAM::Types::GetPolicyResponse] the policy object if found
  def get_policy(policy_arn)
    response = @iam_client.get_policy(policy_arn: policy_arn)
    policy = response.policy
    @logger.info("Got policy '#{policy.policy_name}'. Its ID is: #{policy.policy_id}.")
    policy
  rescue Aws::IAM::Errors::NoSuchEntity
    @logger.error("Couldn't get policy '#{policy_arn}'. The policy does not exist.")
    raise
  rescue Aws::IAM::Errors::ServiceError => e
    @logger.error("Couldn't get policy '#{policy_arn}'. Here's why: #{e.code}: #{e.message}")
    raise
  end

    public func getPolicy(arn: String) async throws -> IAMClientTypes.Policy {
        let input = GetPolicyInput(
            policyArn: arn
        )
        do {
            let output = try await client.getPolicy(input: input)
            guard let policy = output.policy else {
                throw ServiceHandlerError.noSuchPolicy
            }
            return policy
        } catch {
            throw error
        }
    }