Lianja

Examine SSL/TLS Server Certificate

See more Socket/SSL/TLS Examples

Demonstrates how an application can examine and check a server's SSL/TLS certificate. Lianja

llSuccess = .F.

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

loSocket = createobject("CkSocket")

// Connect to a server.
llUseTls = .T.
lnMaxWaitMs = 2000
llSuccess = loSocket.Connect("www.intel.com",443,llUseTls,lnMaxWaitMs)
if (llSuccess = .F.) then
    ? loSocket.LastErrorText
    release loSocket
    return
endif

// If we get here, the TLS connection ws made..
// In any SSL/TLS handshake, the server sends its certificate in a TLS handshake message.
// Chilkat will keep it cached within the object that made the connection.
// Get the server's cert and examine a few things.
loCert = createobject("CkCert")
loSocket.GetServerCert(loCert)

? "Distinguished Name: " + loCert.SubjectDN
? "Common Name: " + loCert.SubjectCN
? "Issuer Distinguished Name: " + loCert.IssuerDN
? "Issuer Common Name: " + loCert.IssuerCN

? "Expired: " + str(loCert.Expired)
? "Revoked: " + str(loCert.Revoked)
? "Signature Verified: " + str(loCert.SignatureVerified)
? "Trusted Root: " + str(loCert.TrustedRoot)

// Sample output:

// Distinguished Name: C=US, ST=California, O=Intel Corporation, CN=*.intel.com
// Common Name: *.intel.com
// Issuer Distinguished Name: C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Organization Validation Secure Server CA
// Issuer Common Name: Sectigo RSA Organization Validation Secure Server CA
// Expired: False
// Revoked: False
// Signature Verified: True
// Trusted Root: True


release loSocket
release loCert