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(DataFlex) HTTPS Server Certificate Require Hostname MatchSee more HTTP ExamplesDemonstrates and explains the RequireHostnameMatch property.Note: This example requires Chilkat v11.0.0 or greater.
Use ChilkatAx-win32.pkg Procedure Test Handle hoHttp String sHtml Boolean bTemp1 // The RequireHostnameMatch property was added in Chilkat v11.0.0 // to ensure the URL's hostname matches at least one of the server certificate SAN's (Subject Alternative Names) // // In actuality, it is the SNI hostname that must match. If the SNI hostname is not explicitly set, // then Chilkat uses the hostname from the URL as the SNI hostname. // Here's an example using chilkatsoft.com // The SSL server certificate for chilkatsoft.com has 2 Subject Alternative Names: // // 1) DNS Name: *.chilkatsoft.com // 2) DNS Name: chilkatsoft.com // // See Explaining the SNI Hostname in TLS Get Create (RefClass(cComChilkatHttp)) To hoHttp If (Not(IsComObjectCreated(hoHttp))) Begin Send CreateComObject of hoHttp End Set ComRequireHostnameMatch Of hoHttp To True // This should succeed because "www.chilkatsoft.com" matches the SAN entry "*.chilkatsoft.com" Get ComQuickGetStr Of hoHttp "https://www.chilkatsoft.com/helloWorld.html" To sHtml Get ComLastMethodSuccess Of hoHttp To bTemp1 Showln "1) Succeeded: " bTemp1 // At the time of writing this example, the IP address for chilkatsoft.com is 3.101.18.47 // If we send the request using the IP address, it will fail because the IP address is does // not match any of the SAN entries in the server certificate. Get ComQuickGetStr Of hoHttp "https://3.101.18.47/helloWorld.html" To sHtml Get ComLastMethodSuccess Of hoHttp To bTemp1 Showln "2) Succeeded: " bTemp1 // However, it will succeed if we explicitly set the SNI hostname. Set ComSniHostname Of hoHttp To "www.chilkatsoft.com" Get ComQuickGetStr Of hoHttp "https://3.101.18.47/helloWorld.html" To sHtml Get ComLastMethodSuccess Of hoHttp To bTemp1 Showln "3) Succeeded: " bTemp1 // Remove our explicit SNI hostname. Set ComSniHostname Of hoHttp To "" // Now let's try wrong.host.badssl.com // The SSL server certificate for badssl.com has 2 Subject Alternative Names: // // 1) DNS Name: *.badssl.com // 2) DNS Name: badssl.com // The domain wrong.host.badssl.com will fail the RequireHostnameMatch because // the wildcarded domain SAN entry only extends 1 level deep. Get ComQuickGetStr Of hoHttp "https://wrong.host.badssl.com/" To sHtml Get ComLastMethodSuccess Of hoHttp To bTemp1 Showln "4) Succeeded: " bTemp1 // The expected output is: // 1) Succeeded: True // 2) Succeeded: False // 3) Succeeded: True // 4) Succeeded: False End_Procedure |
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