CkPython

Enumerate Server-Advertised Acceptable Client CAs

Demonstrates Socket.GetSslAcceptableClientCaDn, which returns a certificate-authority distinguished name advertised by a TLS server when it requests a client certificate.

Background. Valid indexes range from 0 through NumSslAcceptableClientCAs minus one. A client can use these names to select an appropriate client certificate.

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CkPython

import sys
import chilkat

success = False

socket = chilkat.CkSocket()

#  Connect to the server using TLS.
bTls = True
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
if (success == False):
    print(socket.lastErrorText())
    sys.exit()

#  After connecting to a server that requests a client certificate, enumerate the certificate-
#  authority distinguished names the server advertised as acceptable.
numCAs = socket.get_NumSslAcceptableClientCAs()

for i in range(0,numCAs):
    caDn = socket.getSslAcceptableClientCaDn(i)
    if (socket.get_LastMethodSuccess() == False):
        print(socket.lastErrorText())
        sys.exit()

    print(caDn)