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(Tcl) Get the Server Certificate, Certificate Chain, and Root CA Certificate

Demonstrates how to get the HTTP server certificate, its certificate chain, and the root CA certificate.

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

#  Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
#  by calling UnlockBundle.  It requires a Bundle unlock code.
set chilkatGlob [new_CkGlobal]

set success [CkGlobal_UnlockBundle $chilkatGlob "Anything for 30-day trial."]
if {[expr $success != 1]} then {
    puts [CkGlobal_lastErrorText $chilkatGlob]
    delete_CkGlobal $chilkatGlob
    exit
}

set http [new_CkHttp]

#  We're getting the SSL/TLS certificate, so make sure to connect to the SSL/TLS port (443).
# sslCert is a CkCert
set sslCert [CkHttp_GetServerSslCert $http "nationalgeographic.com" 443]
if {[string equal $sslCert "NULL"]} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkGlobal $chilkatGlob
    delete_CkHttp $http
    exit
}

#  Note: Prior to v9.5.0.50, this method would fail if the certificate chain could not
#  be completed to the root.  Starting in v9.5.0.50, the incomplete certificate chain
#  will be returned.  The certificate chain's ReachesRoot property can be examined to
#  see if the chain was completed to the root.
# certChain is a CkCertChain
set certChain [CkCert_GetCertChain $sslCert]
if {[string equal $certChain "NULL"]} then {
    puts [CkCert_lastErrorText $sslCert]
    delete_CkCert $sslCert

    delete_CkGlobal $chilkatGlob
    delete_CkHttp $http
    exit
}

set numCerts [CkCertChain_get_NumCerts $certChain]
for {set i 0} {$i <= [expr $numCerts - 1]} {incr i} {
    # cert is a CkCert
    set cert [CkCertChain_GetCert $certChain $i]
    puts "SubjectDN $i: [CkCert_subjectDN $cert]"
    puts "IssuerDN $i: [CkCert_issuerDN $cert]"
    delete_CkCert $cert

}

#  If the certificate chain reaches the root CA cert, then the last cert in the chain
#  is the root CA cert.
if {[expr [CkCertChain_get_ReachesRoot $certChain] == 1]} then {
    # caCert is a CkCert
    set caCert [CkCertChain_GetCert $certChain [expr $numCerts - 1]]
    puts "CA Root Cert: [CkCert_subjectDN $caCert]"
    delete_CkCert $caCert

}

delete_CkCert $sslCert

delete_CkCertChain $certChain


delete_CkGlobal $chilkatGlob
delete_CkHttp $http

 

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