(Lianja) SFTP Public-Key Authentication (id_ed25519)

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Demonstrates how to authenticate with an SSH/SFTP server using publickey authentication with an Ed25519 private key (id_ed25519).

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

loKey = createobject("CkSshKey")

// The id_ed25519 file should contain something like this:
// (You can open it in a text editor..)

// -----BEGIN OPENSSH PRIVATE KEY-----
// b3BlbnNzaC1rZXktdjEAAAAACmFlczI1Ni1jdHIAAAAGYmNyeXB0AAAAGAAAABDIeK9+Xw
// 6Do9gnhtrJu5iJAAAAZAAAAAEAAAAzAAAAC3NzaC1lZDI1NTE5AAAAIMh/Ge7fjQCssmVd
// BqjYZbRAI0pY8IrnB6J1yLetq34OAAAAoMVP7cvy4hTiAINA3I4v55OonkpKza8mzfUW18
// RDQeYL3ovCVaAYOGcCpf/SW3QiY6tnXq+5WDEfJ7Z/kQ0nl2+1wSLOytxpyO+IY0rRtLrX
// 6e/agR4nbZpt/MFG6xqcNASbtDgg+9IWGvDrtXOLFofx07/zml+UjFL0tXRpCjOxeqKyXH
// t8SRgdT97d9/bYPwapaXY+b2DVVy5/LVx4Sq8=
// -----END OPENSSH PRIVATE KEY-----

lcPrivKeyText = loKey.LoadText("c:/temp/id_ed25519")
if (loKey.LastMethodSuccess <> .T.) then
    ? loKey.LastErrorText
    release loKey
    return
endif

// If your private key was saved encrypted, then you'll need the password.
// In this example, the password "blahblah" is valid for the above key -- which is a real Ed25519 key generated/saved from puttygen.
loKey.Password = "blahblah"

llSuccess = loKey.FromOpenSshPrivateKey(lcPrivKeyText)
if (llSuccess <> .T.) then
    ? loKey.LastErrorText
    release loKey
    return
endif

loSftp = createobject("CkSFtp")

// Set some timeouts, in milliseconds:
loSftp.ConnectTimeoutMs = 5000
loSftp.IdleTimeoutMs = 15000

lcHostname = "sftp.example.com"
lnPort = 22
llSuccess = loSftp.Connect(lcHostname,lnPort)
if (llSuccess <> .T.) then
    ? loSftp.LastErrorText
    release loKey
    release loSftp
    return
endif

// Authenticate with the SSH server.  Chilkat SFTP supports
// both password-based authenication as well as public-key
// authentication.  
llSuccess = loSftp.AuthenticatePk("myLogin",loKey)
if (llSuccess <> .T.) then
    ? loSftp.LastErrorText
    release loKey
    release loSftp
    return
endif

? loSftp.LastErrorText
? "Public-Key Authentication Successful!"

// Now go do whatever you're app needs to do...


release loKey
release loSftp