(CkPython) Using WS_FTP Self-signed Certificate file (.crt) and Private Key File. (.key)

Demonstrates how to use a self-signed certificate created by WS_FTP with Chilkat FTP2.

Note: It is usually not necessary for the FTP client to use a client-side certificate. Most FTP servers using SSL and TLS connections (explicit or implicit) do not require client-side certs. In addition, some high-security FTP servers require "real" certificates -- meaning certificates issued by a real certificate authority with a chain of authentication that leads to a trusted root certificate. The certificates created by WS_FTP are self-signed and untrusted.

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import sys
import chilkat

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

# Important:  Before running this program, convert your
# .crt and .key files to a .p12 using OpenSSL:
# The command is this:
# openssl pkcs12 -export -in test.crt -inkey test.key -out test.p12
# 

ftp = chilkat.CkFtp2()

ftp.put_Hostname("ftp.***.com")
ftp.put_Port(21)
ftp.put_Username("testLogin")
ftp.put_Password("testPassword")

# This example will use explict TLS/SSL.
# Establish an explicit secure channel after connection
# on the standard FTP port 21.
ftp.put_AuthTls(True)

# The Ssl property is for establishing an implicit SSL connection
# on port 990.  Because this example uses explicit SSL, it 
# should remain False.
ftp.put_Ssl(False)

# Create an instance of a certificate store object, load a .p12 file,
# locate the certificate we need, and use it for signing.
# (a P12/PFX file may contain more than one certificate.)
certStore = chilkat.CkCertStore()
# The 1st argument is the filename, the 2nd arg is the 
# .p12 file's password.  (OpenSSL will prompty you to set a password
# when converting the .crt and .key into a .p12).
success = certStore.LoadPfxFile("test.p12","secret")
if (success != True):
    print(certStore.lastErrorText())
    sys.exit()

# cert is a CkCert
cert = certStore.FindCertBySubjectCN("Your cert's common name")
if (certStore.get_LastMethodSuccess() == False):
    print(certStore.lastErrorText())
    sys.exit()

success = ftp.SetSslClientCert(cert)

# Connect and login to the FTP server.
success = ftp.Connect()
if (success != True):
    print(ftp.lastErrorText())
    sys.exit()
else:
    # LastErrorText contains information even when
    # successful. This allows you to visually verify
    # that the secure connection actually occurred.
    print(ftp.lastErrorText())

print("Secure FTP Channel Established!")
print(ftp.lastErrorText())

# Do whatever you're doing to do ...
# upload files, download files, etc...

# ...
# ...

success = ftp.Disconnect()