(Tcl) Use PuTTY Key for SSH Tunnel (PPK Private Key)

Demonstrates how to authenticate with a username + .ppk PuTTY private key w/ SSH Tunnel.

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load ./chilkat.dll

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

set tunnel [new_CkSshTunnel]

# Load a .ppk PuTTY private key.
set puttyKey [new_CkSshKey]

set ppkText [CkSshKey_loadText $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_put_Password $puttyKey "secret"
set success [CkSshKey_FromPuttyPrivateKey $puttyKey $ppkText]
if {$success != 1} then {
    puts [CkSshKey_lastErrorText $puttyKey]
    delete_CkSshTunnel $tunnel
    delete_CkSshKey $puttyKey
    exit
}

set sshHostname "sftp.example.com"
set sshPort 22

# Connect to an SSH server
set success [CkSshTunnel_Connect $tunnel $sshHostname $sshPort]
if {$success != 1} then {
    puts [CkSshTunnel_lastErrorText $tunnel]
    delete_CkSshTunnel $tunnel
    delete_CkSshKey $puttyKey
    exit
}

# 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.)
set success [CkSshTunnel_AuthenticatePk $tunnel "mySshLogin" $puttyKey]
if {$success != 1} then {
    puts [CkSshTunnel_lastErrorText $tunnel]
    delete_CkSshTunnel $tunnel
    delete_CkSshKey $puttyKey
    exit
}

puts "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...

delete_CkSshTunnel $tunnel
delete_CkSshKey $puttyKey