You can use OpenSSL. If you have to check the certificate with STARTTLS, then just do openssl s_client -connect mail.example.com:25 -starttls smtp or for a standard secure smtp port: openssl s_client -connect mail.example.com:465
RFC2818 states: If more than one identity of a given type is present in the certificate (e.g., more than one dNSName name, a match in any one of the set is considered acceptable.) Names may contain the wildcard character * which is considered to match any single domain name component or component fragment. E.g., *.a.com … Read more
OpenSSL will allow you to look at it if it is installed on your system, using the OpenSSL x509 tool. openssl x509 -in cerfile.cer -noout -text The format of the .CER file might require that you specify a different encoding format to be explicitly called out. openssl x509 -inform pem -in cerfile.cer -noout -text or … Read more
SSL has been around for long enough you’d think that there would be agreed upon container formats. And you’re right, there are. Too many standards as it happens. In the end, all of these are different ways to encode Abstract Syntax Notation 1 (ASN.1) formatted data — which happens to be the format x509 certificates … Read more
could it create problem to install the same certificate on several systems? No, it will not be a problem even if the systems would be connected to the internet in the future. When you connect the system to the internet and do the update it could download a pack of trusted certificates. These certificates will … Read more
I can push by clone project using ssh, but it doesn’t work when I clone project with https. The error message that it shows me is:
try this: given you have files as follow: aps.cer, downloaded from Apple. app.key, your own private key generated by openssl. 1st, convert the .cer file into .pem format: 2nd, use the .pem file and your private .key to generate .p12 file: this should prompt to ask a password for this .p12 file. CF: aps_developer_identity.cer to … Read more
I have problem in IE9 with securiry certificate. Then I go to specific address I got How can I avoid appearence of this window? I try enter on Continue to this website (not recommended). – cectificate error – View Certificates. I see that This certificate is OK. in certificate Status on certification Path tab. But … Read more
the simple way I believe is to import it then export it, using the certificate manager in Windows Management Console.
As a workaround you could add a handler to the ServicePointManager‘s ServerCertificateValidationCallback on the client side: but be aware that this is not a good practice as it completely ignores the server certificate and tells the service point manager that whatever certificate is fine which can seriously compromise client security. You could refine this and do some custom checking (for … Read more