B4X Requires Chilkat v11.0.0+

Verify SSL Server Certificate

See more Socket/SSL/TLS Examples

Demonstrates how to connect to an SSL server and verify its SSL certificate. B4X

Dim success As Boolean = False

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

Dim socket As ChilkatSocket
socket.Initialize("socket")

Dim ssl As Boolean = True
Dim maxWaitMillisec As Int = 20000

'  The SSL server hostname may be an IP address, a domain name,
'  or "localhost". 
Dim sslServerHost As String
sslServerHost = "www.paypal.com"
Dim sslServerPort As Int = 443

'  Connect to the SSL server:
success = socket.Connect(sslServerHost, sslServerPort, ssl, maxWaitMillisec)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If


Dim cert As ChilkatCert
cert.Initialize("cert")

Dim bExpired As Boolean
Dim bRevoked As Boolean
Dim bSignatureVerified As Boolean
Dim bTrustedRoot As Boolean

success = socket.GetServerCert(cert)
If success <> False Then

    Log("Server Certificate:")
    Log("Distinguished Name: " & cert.SubjectDN)
    Log("Common Name: " & cert.SubjectCN)
    Log("Issuer Distinguished Name: " & cert.IssuerDN)
    Log("Issuer Common Name: " & cert.IssuerCN)

    bExpired = cert.Expired
    bRevoked = cert.Revoked
    bSignatureVerified = cert.SignatureVerified
    bTrustedRoot = cert.TrustedRoot

    Log("Expired: " & bExpired)
    Log("Revoked: " & bRevoked)
    Log("Signature Verified: " & bSignatureVerified)
    Log("Trusted Root: " & bTrustedRoot)

End If


'  Close the connection with the server
'  Wait a max of 20 seconds (20000 millsec)
success = socket.Close(20000)