(C++) AWS Transfer for SFTP (Amazon S3)

Once you've setup your AWS Transfer for SFTP in the AWS Console, interacting with it is no different than any other SSH/SFTP server. AWS will provide a private key in PEM format. It is used for authentication (instead of a password).

For more information, see https://docs.aws.amazon.com/transfer/latest/userguide/getting-started-use-the-service.html

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#include <CkSFtp.h>
#include <CkSshKey.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSFtp sftp;

    // Connect to the AWS SFTP server.
    // Change the domain to your value.
    const char *domain = "s-123456df999999fab.server.transfer.eu-west-2.amazonaws.com";
    int port = 22;
    bool success = sftp.Connect(domain,port);
    if (success == false) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    // Load your AWS SFTP private key PEM file..
    CkSshKey sshKey;
    const char *keyText = sshKey.loadText("qa_data/pem/s3_sftp_privateKey.pem");
    if (sshKey.get_LastMethodSuccess() != true) {
        std::cout << sshKey.lastErrorText() << "\r\n";
        return;
    }

    success = sshKey.FromOpenSshPrivateKey(keyText);
    if (success == false) {
        std::cout << sshKey.lastErrorText() << "\r\n";
        return;
    }

    // Authenticate with the SSH server using the private key.
    success = sftp.AuthenticatePk("myUsername",sshKey);
    if (success == false) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    // After authenticating, the SFTP subsystem must be initialized:
    success = sftp.InitializeSftp();
    if (success == false) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    // Upload from the local file to the SSH server.
    // Important -- the remote filepath is the 1st argument,
    // the local filepath is the 2nd argument;
    const char *remoteFilePath = "hamlet.xml";
    const char *localFilePath = "c:/temp/hamlet.xml";

    success = sftp.UploadFileByName(remoteFilePath,localFilePath);
    if (success == false) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Success." << "\r\n";
    }