These commands allow you to generate CSRs, Certificates, Private Keys and do other miscellaneous tasks. Below, we have listed the most common OpenSSL commands and their usage: General OpenSSL Commands If you don't want to bother with OpenSSL, you can do many of the same things with our SSL Certificate Tools. A compiled version of OpenSSL for Windows can be found here. However, it also has hundreds of different functions that allow you to view the details of a CSR or certificate, compare an MD5 hash of the certificate and private key (to make sure they match), verify that a certificate is installed properly on any website, and convert the certificate to a different format. OpenSSL is commonly used to create the CSR and private key for many different platforms, including Apache. There are versions of OpenSSL for nearly every platform, including Windows, Linux, and Mac OS X. etc/letsencrypt/live/sitename.tld/cert.pem: OKĪfter breaking an entire day on the exact same issue, with no prior knowledge on SSL certificates, i downloaded the CERTivity Keystores Manager and imported my keystore to it, and got a clear-cut visualisation of the certificate chain.One of the most versatile SSL tools is OpenSSL which is an open source implementation of the SSL protocol. Issue this command: $ openssl verify -CAfile letsencrypt-root-cert/ -untrusted letsencrypt-intermediate-cert/ /etc/letsencrypt/live/sitename.tld/cert.pem Download the root-cert and the intermediate-cert from the letsencrypt chain of trust.I've had to do a verification of a letsencrypt certificate and I did it like this: Ever wondered why crypto has not become mainstream in the last 30 years? That's why. It's SSL, ya' know? SSL is probably one of the worst designs I ever saw in over 30 years of professional system administration. So you are definitively not alone with all that pain. But you will get better each time you need to do this. It is like a computer puzzle game to solve the riddle. Well, experiment, until the check tells you everything is OK. Openssl s_server -key "$KEY" -cert "$CRT" -www &ĭone CA-Bundle is not needed! something is wrong, verification failed! certificate.bundleĪnd how can you find out which files are needed or not and in which sequence? That's one of the few legitimate jobs for cat: openssl verify -verbose -CAfile &2 exit 23 } It will verify your entire chain in a single command. Try this instead: openssl verify -CAfile RootCert.pem -untrusted Intermediate.pem UserCert.pem This is why your second command didn't work. In other words, root CA needs to be self signed for verify to work. If a certificate is found which is its own issuer it is assumed to be the root CA. In the next step I validate the User Cert with openssl verify -verbose -CAfile Intermediate.pem UserCert.pemĪnd the validation shows error 20 at 0 depth lookup:unable to get local issuer certificate With openssl verify -verbose -CAfile RootCert.pem Intermediate.pem Now I want to verify if a User Certificate has its anchor by Root Certificate. Root Cert is a self signed certificate, Intermediate Certificate is signed by Root and User by Intermediate. I'm building a own certificate chain with following componenents: Root Certificate - Intermediate Certificate - User Certificate
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