(PureBasic) Use PuTTY Key for SFTP Authentication

Demonstrates how to authenticate with a username + .ppk PuTTY private key for SFTP authentication.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkSshKey.pb"
IncludeFile "CkSFtp.pb"

Procedure ChilkatExample()

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

    sftp.i = CkSFtp::ckCreate()
    If sftp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Load a .ppk PuTTY private key.
    puttyKey.i = CkSshKey::ckCreate()
    If puttyKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ppkText.s = CkSshKey::ckLoadText(puttyKey,"qa_data/ppk/putty_private_secret.ppk")

    ; The ppkText contains this content:

    ; 	PuTTY-User-Key-File-2: ssh-rsa
    ; 	Encryption: aes256-cbc
    ; 	Comment: rsa-key-20170126
    ; 	Public-Lines: 6
    ; 	AAAAB3NzaC1yc2EAAAABJQAAAQEAx+52s7vvaZ8rT2UdFZWlSUVDHDQ+5ZRFvgRW
    ; 	6nm2sO1c9WqNg7u2PQL4jeKSDX2XWcMnpleALz2x8Rr4rMy5E1iZzvWov8VtFd8l
    ; 	fa9HOkgEeJB3VFuYR3NlnD3eyCoYJYPVpHJHrIeui2WZs5vQ76HDe+th8+z5Ald4
    ; 	zPw3p2c6ZJpBrkSBM67hWokoBDi23c7NhszDHhJBrv+B98cQxnagI1PUKqN7E8Vg
    ; 	bNtBI8beIMHyI69up9G1AXSEi0cGIjYNx9RNUPau1mRk/SvfqxgWkAjM005lj7hc
    ; 	bOsjbdKK3T2NtrKTaYjEiXlEXcj1iGuApsD/m73pYaEJB3Nd7w==
    ; 	Private-Lines: 14
    ; 	MoaDbq0owouN/7Z9Pga0favDhM2bSEgMErJBxdDmNUXIVVcUoLiD/Ps1RA+BeBBX
    ; 	wxqKUt9PqLy/pnafPR/i2xjJiQtQ0CWkPxND16Gi1dqLzmbQYYl1ev4+LzuG0zNX
    ; 	HDGMvRiwagY7mY+F1tUjBYfOL6z8XHw4m40YcY1QorOO+0MMzAVT5Hkg8YyXW209
    ; 	B/V/LRADFMVA2BlL39y11cb5ZpFStPH/waYUMY+2w1ZmJZ7dcRoMjuKmY+YE/tUx
    ; 	n9X3P0qTNSbw6e6sMG3Dhr1vfoJUQWApUliD6GpUiCeIvXBcVqG8Vsfq9XADsPl0
    ; 	+nFAwjSZflywcB7/FwhGb7q5UmcJK06SzoMl7Og5e3g7NCs3yNNQIv+qCpDjhxrA
    ; 	hpT03mbipu7OXCZDeUwUhMGJAmYHE5iqm1rPCsSVbaMgpxhCWf01Cx4gLx3aMvn4
    ; 	MdylA31GuL3wSxcWTslrOI8+449lZN/qZEnGEZkYTrnlu123jTqsAWMMtuHSz2Ig
    ; 	6GA89oTdlppkNflhNH3OJ85kMUrc3p/ZBMdndz8jTDTljmJjHR5oNMoShFof115A
    ; 	nWjUHqBwCgcubLYyH3afDvBTOhtl0tJ9Oby0wJlOAGnCXiPSDbF/y7J7xml/PS9t
    ; 	XlSVNxtAY15NDO6Fp96sBVfKuJsfJ90PzdBom4ikIuf7sMwtElrHHLuYfcXJQYLp
    ; 	G5jBmqDgnirosVPEBIxlxFzz/HCRmdU+tsYg46gqI4R5UpKUe8WSaJoZkDGsrqhm
    ; 	e+1SJaBuafR4v2bx/bV414Hg7LGQosK2S3crxH4UgZl+g02vWznZfBH+9CmHvKDR
    ; 	AxfcKOTzsaILKJtQPV81lmJ45sARYMcB5jMiE4kBg56hiXouChsvKkm55WVcW1E+
    ; 	Private-MAC: 17512c9f7582c1d9c3ae2b01b4d67a6b1dbd1d0e

    ; "secret" is the actual password for the above PPK.
    CkSshKey::setCkPassword(puttyKey, "secret")
    success.i = CkSshKey::ckFromPuttyPrivateKey(puttyKey,ppkText)
    If success <> 1
        Debug CkSshKey::ckLastErrorText(puttyKey)
        CkSFtp::ckDispose(sftp)
        CkSshKey::ckDispose(puttyKey)
        ProcedureReturn
    EndIf

    sshHostname.s = "sftp.example.com"
    sshPort.i = 22

    ; Connect to an SSH/SFTP server
    success = CkSFtp::ckConnect(sftp,sshHostname,sshPort)
    If success <> 1
        Debug CkSFtp::ckLastErrorText(sftp)
        CkSFtp::ckDispose(sftp)
        CkSshKey::ckDispose(puttyKey)
        ProcedureReturn
    EndIf

    ; Authenticate with the SSH server using a username + private key.
    ; (The private key serves as the password.  The username identifies
    ; the SSH user account on the server.)
    success = CkSFtp::ckAuthenticatePk(sftp,"mySshLogin",puttyKey)
    If success <> 1
        Debug CkSFtp::ckLastErrorText(sftp)
        CkSFtp::ckDispose(sftp)
        CkSshKey::ckDispose(puttyKey)
        ProcedureReturn
    EndIf

    Debug "OK, the connection and authentication with the SSH server is completed."

    ; This example is only to show the connection + authentication using a PuTTY private key...


    CkSFtp::ckDispose(sftp)
    CkSshKey::ckDispose(puttyKey)


    ProcedureReturn
EndProcedure