(Go) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    ssh := chilkat.NewSsh()

    // Set some timeouts, in milliseconds:
    ssh.SetConnectTimeoutMs(5000)
    ssh.SetIdleTimeoutMs(15000)

    // Connect to the SSH server.  
    // The standard SSH port = 22
    // The hostname may be a hostname or IP address.
    hostname := "sftp.example.com"
    port := 22
    success := ssh.Connect(hostname,port)
    if success != true {
        fmt.Println(ssh.LastErrorText())
        ssh.DisposeSsh()
        return
    }

    key := chilkat.NewSshKey()

    // Read the PEM file into a string variable:
    // (This does not load the PEM file into the key.  The LoadText
    // method is a convenience method for loading the full contents of ANY text
    // file into a string variable.)
    privKey := key.LoadText("myPrivateKey.pem")
    if key.LastMethodSuccess() != true {
        fmt.Println(key.LastErrorText())
        ssh.DisposeSsh()
        key.DisposeSshKey()
        return
    }

    // Load a private key from a PEM string:
    // (Private keys may be loaded from OpenSSH and Putty formats.
    // Both encrypted and unencrypted private key file formats
    // are supported.  This example loads an unencrypted private
    // key in OpenSSH format.  PuTTY keys typically use the .ppk
    // file extension, while OpenSSH keys use the PEM format.
    // (For PuTTY keys, call FromPuttyPrivateKey instead.)
    success = key.FromOpenSshPrivateKey(*privKey)
    if success != true {
        fmt.Println(key.LastErrorText())
        ssh.DisposeSsh()
        key.DisposeSshKey()
        return
    }

    // Authenticate with the SSH server using the login and
    // private key.  (The corresponding public key should've 
    // been installed on the SSH server beforehand.)
    success = ssh.AuthenticatePk("myLogin",key)
    if success != true {
        fmt.Println(ssh.LastErrorText())
        ssh.DisposeSsh()
        key.DisposeSshKey()
        return
    }

    fmt.Println(ssh.LastErrorText())
    fmt.Println("Public-Key Authentication Successful!")

    ssh.DisposeSsh()
    key.DisposeSshKey()