This is WRONG, because this implicitly trusts intermediate.pem, as Johannes Pille points out. Which doesn't make sense since root.pem is indeed the issuer for intermediate.pem.Įdit: I had originally posted an answer saying that root.pem and intermediate.pem should be concatenated in one file, and then one should use this file as the parameter for -CAfile. + capassword + -in intermediate.csr -out intermediate.pem) os.system(openssl verify. To the best of my knowledge, this means that openssl is unable to find the issuer for intermediate.pem. Important: reasons for and problems of a full certificate chain. However, john.pem fails: $ openssl verify -CAfile root.pem -CAfile intermediate.pem john.pemĮrror 2 at 1 depth lookup:unable to get issuer certificate openssl verify -CAfile chain.pem mycert.pem It's also important (of course) that openssl knows how to find the root certificate if not included in chain.pem. $ openssl verify -CAfile root.pem intermediate.pem We suggest checking the OpenSSL versions running on your servers and taking action to fix CVE-2023-0286, a high-severity Type Confusion Vulnerability in OpenSSL. I supplied these certificates along with the server key to the openssl sserver command. The official advisory says OpenSSL versions 3.0, 1.1.1, and 1.0.2 are vulnerable to this vulnerability. I have created my own root CA, an intermediate CA and a server certificate. I installed OpenSSL on a Linux box (actually used a RedHat package) and it looks okay. It includes OCSP, CRL and CA Issuer information and specific issue and expiry dates. Hello I am having the damnest time with OpenSSL and STunnel, and wanted to see if anyone could give me a swift kick in the right direction :). All certs under that should have the 'issuer' content being the 'subject' of the certificate preceding it in the chain: openssl x509 -issuer. I am trying to set up a certificate chain for a lab server. These are quick and dirty notes on generating a certificate authority (CA), intermediate certificate authorities and end certificates using OpenSSL. Unix: cat root.pem > root-chain.pem Windows: copy /A root.pem root-chain.pem Both: openssl verify -CAfile root-chain.pem cert1.pem. The root certificate should have the 'subject' and 'issuer' content the same. openssl verify -CAfile cert2-chain.pem cert3.pem 2.3 If this is OK, proceed to the next one (cert4.pem in this case) Thus for the first round through the commands would be. When I examine them using openssl x509 -in -text -noout they look fine, root.pem looks like it is self-signed (Issuer = Subject), and the Subject of each certificate is the Issuer of the next one, as expected.Īnd indeed I can verify the chain up to the intermediate certificate: $ openssl verify -CAfile root.pem root.pem To check to see if you have a complete chain, you can perform the following command to verify that the chain is complete.
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