Convert PuTTY Private Key (ppk) to OpenSSH (pem)

Convert a PuTTY format private key file (.ppk) to OpenSSH (.pem).

Download Chilkat 32-bit SSH / SFTP ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

set key = CreateObject("Chilkat.SshKey")

'  Load an unencrypted or encrypted PuTTY private key.

'  If  your PuTTY private key is encrypted, set the Password
'  property before calling FromPuttyPrivateKey.
'  If your PuTTY private key is not encrypted, it makes no diffference
'  if Password is set or not set.
key.Password = "secret"

'  First load the .ppk file into a string:

keyStr = key.LoadText("putty_private_key.ppk")

'  Import into the SSH key object:
success = key.FromPuttyPrivateKey(keyStr)
If (success <> 1) Then
    MsgBox key.LastErrorText
    WScript.Quit
End If

'  Convert to an encrypted or unencrypted OpenSSH key.

'  First demonstrate converting to an unencrypted OpenSSH key

bEncrypt = 0
unencryptedKeyStr = key.ToOpenSshPrivateKey(bEncrypt)
success = key.SaveText(unencryptedKeyStr,"unencrypted_openssh.pem")
If (success <> 1) Then
    MsgBox key.LastErrorText
    WScript.Quit
End If

'  Save to an encrypted OpenSSH PEM file:

bEncrypt = 1
key.Password = "myPassword"
encryptedKeyStr = key.ToOpenSshPrivateKey(bEncrypt)
success = key.SaveText(encryptedKeyStr,"encrypted_openssh.pem")
If (success <> 1) Then
    MsgBox key.LastErrorText
    WScript.Quit
End If

MsgBox "Done!"