Zig

AWS Security Token Service (STS) AssumeRole

See more AWS Security Token Service Examples

Returns a set of temporary security credentials that you can use to access AWS resources. These temporary credentials consist of an access key ID, a secret access key, and a security token. Typically, you use AssumeRole within your account or for cross-account access. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    const rest = try chilkat.Rest.init();
    defer rest.deinit();

    // Connect to the Amazon AWS REST server.
    // such as https://sts.us-west-2.amazonaws.com/
    const b_tls = true;
    const port = 443;
    const b_auto_reconnect = true;
    try rest.connect("sts.us-west-2.amazonaws.com", port, b_tls, b_auto_reconnect);

    // Provide AWS credentials for the REST call.
    const auth_aws = try chilkat.AuthAws.init();
    defer auth_aws.deinit();
    auth_aws.setAccessKey("AWS_ACCESS_KEY");
    auth_aws.setSecretKey("AWS_SECRET_KEY");
    // the region should match our URL above..
    // See https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_temp_enable-regions.html
    auth_aws.setRegion("us-west-2");
    auth_aws.setServiceName("sts");

    rest.setAuthAws(auth_aws) catch {};

    // Sample Request
    // https://sts.amazonaws.com/
    // ?Version=2011-06-15
    // &Action=AssumeRole
    // &RoleSessionName=testAR
    // &RoleArn=arn:aws:iam::123456789012:role/demo
    // &PolicyArns.member.1.arn=arn:aws:iam::123456789012:policy/demopolicy1
    // &PolicyArns.member.2.arn=arn:aws:iam::123456789012:policy/demopolicy2
    // &Policy={"Version":"2012-10-17","Statement":[{"Sid":"Stmt1",
    // "Effect":"Allow","Action":"s3:*","Resource":"*"}]}
    // &DurationSeconds=3600
    // &Tags.member.1.Key=Project
    // &Tags.member.1.Value=Pegasus
    // &Tags.member.2.Key=Team
    // &Tags.member.2.Value=Engineering
    // &Tags.member.3.Key=Cost-Center
    // &Tags.member.3.Value=12345
    // &TransitiveTagKeys.member.1=Project
    // &TransitiveTagKeys.member.2=Cost-Center
    // &ExternalId=123ABC
    // &SourceIdentity=Alice
    // &AUTHPARAMS

    rest.addQueryParam("Version", "2011-06-15") catch {};
    rest.addQueryParam("Action", "AssumeRole") catch {};
    rest.addQueryParam("DurationSeconds", "3600") catch {};

    rest.addQueryParam("RoleSessionName", "testAR") catch {};
    rest.addQueryParam("RoleArn", "arn:aws:iam::123456789012:role/demo") catch {};
    rest.addQueryParam("PolicyArns.member.1.arn", "arn:aws:iam::123456789012:policy/demopolicy1") catch {};
    rest.addQueryParam("PolicyArns.member.2.arn", "arn:aws:iam::123456789012:policy/demopolicy2") catch {};
    rest.addQueryParam("Policy", "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Sid\":\"Stmt1\",\"Effect\":\"Allow\",\"Action\":\"s3:*\",\"Resource\":\"*\"}]}") catch {};
    rest.addQueryParam("Tags.member.1.Key", "Project") catch {};
    rest.addQueryParam("Tags.member.1.Value", "Pegasus") catch {};
    rest.addQueryParam("Tags.member.2.Key", "Team") catch {};
    rest.addQueryParam("Tags.member.2.Value", "Engineering") catch {};
    rest.addQueryParam("Tags.member.3.Key", "Cost-Center") catch {};
    rest.addQueryParam("Tags.member.3.Value", "12345") catch {};
    rest.addQueryParam("TransitiveTagKeys.member.1", "Project") catch {};
    rest.addQueryParam("TransitiveTagKeys.member.2", "Cost-Center") catch {};
    rest.addQueryParam("ExternalId", "123ABC") catch {};
    rest.addQueryParam("SourceIdentity", "Alice") catch {};

    const response_xml = rest.fullRequestNoBody(alloc, "GET", "/") catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // A successful response will have a status code equal to 200.
    if (rest.getResponseStatusCode() != 200) {
        std.debug.print("response status code = {d}\n", .{rest.getResponseStatusCode()});
        std.debug.print("response status text = {s}\n", .{try rest.getResponseStatusText(alloc)});
        std.debug.print("response header: {s}\n", .{try rest.getResponseHeader(alloc)});
        std.debug.print("response body: {s}\n", .{response_xml});
        return;
    }

    // Examine the successful XML response (shown below)
    const xml = try chilkat.Xml.init();
    defer xml.deinit();
    xml.loadXml(response_xml) catch {};
    std.debug.print("{s}\n", .{try xml.getXml(alloc)});

    // Sample response:

    // <AssumeRoleResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
    //   <AssumeRoleResult>
    //   <SourceIdentity>Alice</SourceIdentity>
    //     <AssumedRoleUser>
    //       <Arn>arn:aws:sts::123456789012:assumed-role/demo/TestAR</Arn>
    //       <AssumedRoleId>ARO123EXAMPLE123:TestAR</AssumedRoleId>
    //     </AssumedRoleUser>
    //     <Credentials>
    //       <AccessKeyId>ASIAIOSFODNN7EXAMPLE</AccessKeyId>
    //       <SecretAccessKey>wJalrXUtnFEMI/K7MDENG/bPxRfiCYzEXAMPLEKEY</SecretAccessKey>
    //       <SessionToken>
    //        AQoDYXdzEPT//////////wEXAMPLEtc764bNrC9SAPBSM22wDOk4x4HIZ8j4FZTwdQW
    //        LWsKWHGBuFqwAeMicRXmxfpSPfIeoIYRqTflfKD8YUuwthAx7mSEI/qkPpKPi/kMcGd
    //        QrmGdeehM4IC1NtBmUpp2wUE8phUZampKsburEDy0KPkyQDYwT7WZ0wq5VSXDvp75YU
    //        9HFvlRd8Tx6q6fE8YQcHNVXAkiY9q6d+xo0rKwT38xVqr7ZD0u0iPPkUL64lIZbqBAz
    //        +scqKmlzm8FDrypNC9Yjc8fPOLn9FX9KSYvKTr4rvx3iSIlTJabIQwj2ICCR/oLxBA==
    //       </SessionToken>
    //       <Expiration>2019-11-09T13:34:41Z</Expiration>
    //     </Credentials>
    //     <PackedPolicySize>6</PackedPolicySize>
    //   </AssumeRoleResult>
    //   <ResponseMetadata>
    //     <RequestId>c6104cbe-af31-11e0-8154-cbc7ccf896c7</RequestId>
    //   </ResponseMetadata>
    // </AssumeRoleResponse>

    // Sample parse code:

    _ = try xml.getAttrValue(alloc, "xmlns");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|SourceIdentity");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|AssumedRoleUser|Arn");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|AssumedRoleUser|AssumedRoleId");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|Credentials|AccessKeyId");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|Credentials|SecretAccessKey");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|Credentials|SessionToken");
    _ = try xml.getChildContent(alloc, "AssumeRoleResult|Credentials|Expiration");
    _ = xml.getChildIntValue("AssumeRoleResult|PackedPolicySize");
    _ = try xml.getChildContent(alloc, "ResponseMetadata|RequestId");

    // Save the session token XML to a file for use by another Chilkat example..
    try xml.saveXml("qa_data/tokens/aws_session_token.xml");
}