B4X Requires Chilkat v10.1.2+

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

See more FTP Examples

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.

B4X

Dim success As Boolean = False

'  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
'  

Dim ftp As ChilkatFtp2
ftp.Initialize("ftp")

ftp.Hostname = "ftp.example.com"
ftp.Port = 21
ftp.Username = "testLogin"
ftp.Password = "testPassword"

'  This example will use explict TLS/SSL.
'  Establish an explicit secure channel after connection
'  on the standard FTP port 21.
ftp.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.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.)
Dim certStore As ChilkatCertStore
certStore.Initialize
'  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 Then
    Log(certStore.LastErrorText)
    Return
End If


Dim jsonCN As ChilkatJsonObject
jsonCN.Initialize
jsonCN.UpdateString("CN", "cert common name")

Dim cert As ChilkatCert
cert.Initialize("cert")
success = certStore.FindCert(jsonCN, cert)
If success = False Then
    Log(certStore.LastErrorText)
    Return
End If


success = ftp.SetSslClientCert(cert)

'  Connect and login to the FTP server.
success = ftp.Connect
If success <> True Then
    Log(ftp.LastErrorText)
    Return
Else
    '  LastErrorText contains information even when
    '  successful. This allows you to visually verify
    '  that the secure connection actually occurred.
    Log(ftp.LastErrorText)
End If


Log("Secure FTP Channel Established!")
Log(ftp.LastErrorText)

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

'  ...
'  ...

success = ftp.Disconnect