GgG5MIIBtQYLYIZIAYb9bAEDAAIwggGkMDoGCCsGAQUFBwIBFi5odHRwOi8vd3d3 ZPw82W3tzPpLQ4zJ1LilYRyyQLYoEt+5+F/+07LJ7z20Hkt8HEyZNp496+ynaF4dģ2duXvsCAwEAAaOCAvowggL2MA4GA1UdDwEB/wQEAwIBhjCCAcYGA1UdIASCAb0w KEZmBMcqeSZ6mdWOw21PoF6tvD2Rwll7XjZswFPPAAgyPhBkWBATaccM7pxCUQD5īUTuJM56H+2MEb0SqPMV9B圆MWkBG6fmXcCabH4JnudSREoQOiPkm7YDr6ictFufġEutkozOtREqqjcYjbTCuNhcBoz4/yO9NV7UfD5+gw6RlgWYw7If48hl66l7XaAs Q0EtMzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAL9hCikQH17+NDdRĬPge+yLtYb4LDXBMUGMmdRW5QYiXtvCgFbsIYOBC6AUpEIc2iihlqO8xB3RtNpcv LmRpZ2ljZXJ0LmNvbTElMCMGA1UEAxMcRGlnaUNlcnQgSGlnaCBBc3N1cmFuY2Ug MAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3 ZSBFViBSb290IENBMB4XDTA4MDQwMjEyMDAwMFoXDTIyMDQwMzAwMDAwMFowZjEL MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3ĭ3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5j MIIGWDCCBUCgAwIBAgIQCl8RTQNbF5EX0u/UA4w/OzANBgkqhkiG9w0BAQUFADBs I:/C=US/O=DigiCert Inc/OU=High Assurance EV Root CA Results in a boatload of output, but what we are interested in is the following: 1 s:/C=US/O=DigiCert Inc/OU=High Assurance CA-3 Using the -showcerts option with openssl s_client, we can seeĪll the certificates, including the chain: openssl s_client -connect :443 -showcerts 2>&1 < /dev/null So, we need to get the certificate chain for our domain, It is required to send the certificate chain along with the certificate you want If it does not give any output, the certificate has no OCSP URI. Now, check if this certificate has an OCSP URI: openssl x509 -noout -ocsp_uri -in wikipedia.pem We can retreive this with the following openssl command: openssl s_client -connect :443 2>&1 &1 wikipedia.pem I'll be using Wikipedia as anĮxample here. I'm using the following version: $ openssl versionįirst we will need a certificate from a website. We will be using OpenSSL in this article. If you want to verify a certificate against a CRL manually you can read my With this referral link you'll get $100 credit for 60 days. You can also sponsor me by getting a Digital Ocean VPS. It means the world to me if you show your appreciation and you'll help pay the server costs. For Windows, Linux & Android, go check it out.Ĭonsider sponsoring me on Github. I'm developing a desktop monitoring app, Leaf Node Monitoring, open source, but paid. You can read more about the OCSP on wikipedia OCSP does not mandate encryption, so other parties may intercept this information. OCSP discloses to the responder that a particular network host used a particular certificate at a particular time.In practice, such considerations are of little consequence, since most applications rely on third-party libraries for all X.509 functions. However, this is balanced by the practical need to maintain a cache. Using OCSP, clients do not need to parse CRLs themselves, saving client-side complexity.Since an OCSP response contains less information than a typical CRL (certificate revocation list), OCSP can use networks and client resources more efficiently.It is an alternative to the CRL, certificate OCSP stands for the Online Certificate Status Protocol and is one way to
OPENSSL VERIFY CERTIFICATE AND KEY HOW TO
This article shows you how to manually verfify a certificate against an OCSP
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