When you are dealing with lots of different SSL Certificates, it is quite easy to forget which certificate goes with which Private Key. Or, for example, which CSR has been generated using which Private Key. From the Linux command line, you can easily check whether an SSL Certificate or a CSR match a Private Key using the OpenSSL utility. Common OpenSSL Commands with Keys and Certificates. Generate RSA private key with certificate in a single command openssl req -x509 -newkey rsa:4096 -sha256 -keyout example.key -out example.crt -subj '/CN=example.com' -days 3650 -passout pass:foobar Generate Certificate Signing Request (CSR) from private key with passphrase. Read RSA Private Key. We can see that the first line of command output provides RSA key ok. Read X509 Certificate. Another case reading certificate with OpenSSL is reading and printing X509 certificates to the terminal. We will use x509 version with the following command.
One of the most versatile SSL tools is OpenSSL which is an open source implementation of the SSL protocol. There are versions of OpenSSL for nearly every platform, including Windows, Linux, and Mac OS X. OpenSSL is commonly used to create the CSR and private key for many different platforms, including Apache. 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. A compiled version of OpenSSL for Windows can be found here.
If you don't want to bother with OpenSSL, you can do many of the same things with our SSL Certificate Tools. Below, we have listed the most common OpenSSL commands and their usage:
General OpenSSL Commands
These commands allow you to generate CSRs, Certificates, Private Keys and do other miscellaneous tasks.
![]() Checking Using OpenSSL
If you need to check the information within a Certificate, CSR or Private Key, use these commands. You can also check CSRs and check certificates using our online tools.
Debugging Using OpenSSL
If you are receiving an error that the private doesn't match the certificate or that a certificate that you installed to a site is not trusted, try one of these commands. Photoshop cs6 product key generator. If you are trying to verify that an SSL certificate is installed correctly, be sure to check out the SSL Checker.
Openssl Create X509 Certificate From Public KeyConverting Using OpenSSLOpenssl X509 Show Cert
These commands allow you to convert certificates and keys to different formats to make them compatible with specific types of servers or software. For example, you can convert a normal PEM file that would work with Apache to a PFX (PKCS#12) file and use it with Tomcat or IIS. Use our SSL Converter to convert certificates without messing with OpenSSL.
Openssl Create X509 Certificate![]() Openssl Generate X509 Certificate From Private Key Mac
Originally posted on Sun Jan 13, 2008
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