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OpenSSL "ca -selfsign" - Self Sign CSR
How to sign my own CSR to create a self-signed certificate using the OpenSSL "ca" command? You can use the OpenSSL "req -new -x509" command to generate a self-signed certificate from your private key. But you can also use the "ca -selfsign" command to generate a self-signed certificate from your CSR...
2016-09-09, 343👍, 0💬

OpenSSL [ca] Section in Configuration File
How to provide OpenSSL "ca" command options in the configuration file? I see examples of using the [ca] section. Yes, you can use the [ca] section to help providing OpenSSL "ca" command options in the configuration file. But there are 4 ways to provide "ca" command options: 1. Using unnamed section ...
2016-09-09, 293👍, 0💬

OpenSSL "ca" Error "lookup failed for ca::database"
Why I am getting the "variable lookup failed for ca::database" error when running OpenSSL "ca" command? You are getting the "variable lookup failed for ca::database" error, because OpenSSL "ca" command can not find the required "database" option in the configuration file. For example, if you have th...
2016-09-08, 1343👍, 0💬

OpenSSL "ca" Error "lookup failed for ca::policy"
Why I am getting the "variable lookup failed for ca::policy" error when running OpenSSL "ca" command? You are getting the "variable lookup failed for ca::policy" error, because OpenSSL "ca" command can not find the required "policy" option in the configuration file. For example, if you have the foll...
2016-09-08, 995👍, 0💬

OpenSSL "ca" Error "lookup failed for ca::default_md"
Why I am getting the "variable lookup failed for ca::default_md" error when running OpenSSL "ca" command? You are getting the "variable lookup failed for ca::default_md" error, because OpenSSL "ca" command can not find the required "default_md" option in the configuration file. For example, if you h...
2016-09-08, 963👍, 0💬

OpenSSL "ca" Error "lookup failed for ca::serial"
Why I am getting the "variable lookup failed for ca::serial" error when running OpenSSL "ca" command? You are getting the "variable lookup failed for ca::serial" error, because OpenSSL "ca" command can not find the required "serial" option in the configuration file. For example, if you have the foll...
2016-09-08, 887👍, 0💬

OpenSSL "ca" Error "cannot lookup how many days ..."
Why I am getting the "cannot lookup how many days to certify for" error when running OpenSSL "ca" command? You are getting the "cannot lookup how many days to certify for" error, because OpenSSL "ca" command can not find the required "default_days" option in the configuration file. For example, if y...
2016-09-08, 575👍, 0💬

Start OpenSSL on Windows Systems
How to start OpenSSL? Where is it located? I have installed OpenSSL for Windows 0.9.8h on my Windows computer. If you have OpenSSL for Windows installed, you can start the "openssl" command using these steps: 1. Go to the "C:\Program Files\GnuWin32\bin" folder. 2. Find openssl.exe and double-click o...
2016-09-04, 704👍, 0💬

Download OpenSSL 0.9.8h for Windows
How to download OpenSSL for Windows? I heard that OpenSSL is nice free tool to manage keys and certificates. You can download OpenSSL Windows version using these steps: 1. Go to the OpenSSL for Windows Web site. 2. Go to the line: "Complete package, except sources - Setup - 4658384 - 4 December 2008...
2016-09-04, 561👍, 0💬

Other OpenSSL Versions for Windows
Any other versions of OpenSSL for Windows systems? Yes, here is a collection of tutorials on other OpenSSL versions for Windows compiled by FYIcenter.com team. Download OpenSSL 0.9.8h for Windows Install OpenSSL 0.9.8h on Windows Start OpenSSL on Windows Systems   ⇒⇒OpenSSL Tutorials
2016-09-04, 390👍, 0💬

Simple Working Configuration File for OpenSSL "ca"
Where to find a simple configuration file example for the OpenSSL "ca" command? Here is a simple configuration file example for the OpenSSL "ca" command: # Unnamed section of generic options # ------------------------------ ------------------------------ ------# Section for the "default_ca" option # ...
2016-09-04, 332👍, 0💬

OpenSSL "policy" Options for "ca" Command
What are policy options in the configuration file for the OpenSSL "ca" command? Policy options in the configuration file are used by the OpenSSL "ca" command for 2 purposes: Defines validation rules for DN (Distinguished Name) fields. Defines the order of DN (Distinguished Name) fields in the certif...
2016-09-04, 301👍, 0💬

OpenSSL - Certificate Management Toolkit - 23 Tutorials
Do you want to learn how to use OpenSSL as a certificate management tool? Here is a collection of 23 easy-to-follow tutorials on OpenSSL: How to download and install OpenSSL on Windows systems? How to print out X.509 certificate information? How to connect to a HTTPS Web server? How to validate an X...
2012-12-07, 3828👍, 0💬

OpenSSL "verify -CAfile" - Specify Root CA Certificate
How to specify the root CA certificates that close the signing chain for the server certificate for OpenSSl "verify" command? I have downloaded the root CA certificate in a file. If you have the root CA certificate downloaded in a file, you can provide it to the OpenSSL "verify" command using the "-...
2012-07-24, 6352👍, 0💬

OpenSSL "verify -untrusted" - Specify Untrusted Certificate
How to specify those intermediate CA certificates that form the signing chain for the server certificate for OpenSSl "verify" command? I have the certificate chain from the server saved in a file. If you have the server certificate chain saved in a file, you can provide it to the OpenSSL "verify" co...
2012-07-24, 5998👍, 0💬

OpenSSL "verify" - Verify or Validate Certificate
How to verify or validate a certificate using OpenSSL "verify" command? I got a certificate from the Web site server and want to see if it is valid. If you have a certificate stored in a file, you can try to validate it or verify it with the OpenSSL "verify" command as shown below: C:\Users\fyicente...
2012-07-24, 5982👍, 0💬

Download Root CA Certificate
How to download the certificate from a root CA? I need to the root CA certificate to close the certification validation chain. If you know the CN (Common Name) of the root CA, for example "DigiCert High Assurance EV Root CA", you can search and download it our certificate database at certificate.fyi...
2012-07-24, 5484👍, 0💬

OpenSSL Verify Operation Steps
How does the OpenSSL verify operation work? What are the steps used by OpenSSL to verify a certificate? The OpenSSL verify operation uses the same functions as the internal SSL and S/MIME verification, therefore this description applies to these verify operations too. There is one crucial difference...
2012-07-24, 3514👍, 0💬

Save OpenSSL Command Output to File
How to save the output of an OpenSSL command into a file? I want to make a copy of the server certificate display in the "s_client -connect" command output. If want to save the output an OpenSSL command into a file, you need to run the entire OpenSSL command at the Windows command prompt with the Wi...
2012-07-24, 10905👍, 0💬

OpenSSL "s_client -connect" - Show Server Certificate Chain
How to show all certificates in the server certificate chain using the OpenSSL "s_client -connect" command? I know the server uses multiple intermediate CA certificates. You can get all certificates in the server certificate chain if use "s_client -connect" with the "-showcerts" option as shown belo...
2012-07-24, 8301👍, 0💬

OpenSSL "s_client -connect" - Connect to HTTPS Web Site
How to connect to a HTTPS Web site using OpenSSL? I see the Web sites using the "https:\" format. If you see a Web sites using the "https:\" format, for example https://twitter.com/login/, you can try to connect the Web site using the "x509 -connect" command as shown below: C:\Users\fyicenter&gt...
2012-07-24, 8105👍, 0💬

OpenSSL "s_client -connect" - View Server Certificate
How to view the server certificate using the OpenSSL "s_client -connect" command? You can get the server certificate, if use "s_client -connect" without the "-quiet" option as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; s_client -connect www.twitter.com:443 CONN...
2012-07-24, 5406👍, 0💬

OpenSSL "verify" Command Options
What can I use OpenSSL "verify" command for? What are options supported by the "verify" command? OpenSSL "verify" command is a utility to verify certificates. Here are options supported by the "verify" command: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; verify -h usage: ver...
2012-07-24, 3878👍, 0💬

OpenSSL "x509 -fingerprint" - Print Certificate Fingerprint
How to print out MD5 and SHA-1 fingerprints of a certificate using OpenSSL "x509" command? I need to see them and validate them with the owner of the certificate. Assuming you have a certificate file located at: C:\Users\fyicenter\twitter.crt ,you can print out certificate fingerprints using the "x5...
2012-07-23, 10005👍, 0💬

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