(C) 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.

For more information, see https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html

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#include <C_CkRest.h>
#include <C_CkAuthAws.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    BOOL success;
    HCkAuthAws authAws;
    const char *responseXml;
    HCkXml xml;
    const char *AssumeRoleResponse_xmlns;
    const char *SourceIdentity;
    const char *Arn;
    const char *AssumedRoleId;
    const char *AccessKeyId;
    const char *SecretAccessKey;
    const char *SessionToken;
    const char *Expiration;
    int PackedPolicySize;
    const char *RequestId;

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

    rest = CkRest_Create();

    // Connect to the Amazon AWS REST server.
    // such as https://sts.us-west-2.amazonaws.com/
    bTls = TRUE;
    port = 443;
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"sts.us-west-2.amazonaws.com",port,bTls,bAutoReconnect);

    // Provide AWS credentials for the REST call.
    authAws = CkAuthAws_Create();
    CkAuthAws_putAccessKey(authAws,"AWS_ACCESS_KEY");
    CkAuthAws_putSecretKey(authAws,"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
    CkAuthAws_putRegion(authAws,"us-west-2");
    CkAuthAws_putServiceName(authAws,"sts");

    CkRest_SetAuthAws(rest,authAws);

    // 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

    CkRest_AddQueryParam(rest,"Version","2011-06-15");
    CkRest_AddQueryParam(rest,"Action","AssumeRole");
    CkRest_AddQueryParam(rest,"DurationSeconds","3600");

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

    responseXml = CkRest_fullRequestNoBody(rest,"GET","/");
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        return;
    }

    // A successful response will have a status code equal to 200.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        printf("response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("response status text = %s\n",CkRest_responseStatusText(rest));
        printf("response header: %s\n",CkRest_responseHeader(rest));
        printf("response body: %s\n",responseXml);
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        return;
    }

    // Examine the successful XML response (shown below)
    xml = CkXml_Create();
    CkXml_LoadXml(xml,responseXml);
    printf("%s\n",CkXml_getXml(xml));

    // 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:

    AssumeRoleResponse_xmlns = CkXml_getAttrValue(xml,"xmlns");
    SourceIdentity = CkXml_getChildContent(xml,"AssumeRoleResult|SourceIdentity");
    Arn = CkXml_getChildContent(xml,"AssumeRoleResult|AssumedRoleUser|Arn");
    AssumedRoleId = CkXml_getChildContent(xml,"AssumeRoleResult|AssumedRoleUser|AssumedRoleId");
    AccessKeyId = CkXml_getChildContent(xml,"AssumeRoleResult|Credentials|AccessKeyId");
    SecretAccessKey = CkXml_getChildContent(xml,"AssumeRoleResult|Credentials|SecretAccessKey");
    SessionToken = CkXml_getChildContent(xml,"AssumeRoleResult|Credentials|SessionToken");
    Expiration = CkXml_getChildContent(xml,"AssumeRoleResult|Credentials|Expiration");
    PackedPolicySize = CkXml_GetChildIntValue(xml,"AssumeRoleResult|PackedPolicySize");
    RequestId = CkXml_getChildContent(xml,"ResponseMetadata|RequestId");

    // Save the session token XML to a file for use by another Chilkat example..
    success = CkXml_SaveXml(xml,"qa_data/tokens/aws_session_token.xml");


    CkRest_Dispose(rest);
    CkAuthAws_Dispose(authAws);
    CkXml_Dispose(xml);

    }