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OpenSSL "req" - "prompt=yes" Mode with DN Validations
How to specify DN value length limit validations when using the "prompt=yes" mode of the OpenSSL "req -new" command? If you are using "prompt=yes" mode, you can also set DN (Distinguished Name) value length limits in the configuration file. OpenSSL will perform value length validations for you. For ...
2016-10-30, 942👍, 0💬

OpenSSL "ca" - Create CSR for Testing
How to generate a new CSR to test the OpenSSL "ca" command? If you need some CSR (Certificate Signing Request) for testing purpose, you can generate them using the OpenSSL "req" command as shown below: C:\Users\fyicenter&gt;\loc al\OpenSSL-Win32\bin\openssl.e xeOpenSSL&gt; req -newkey rsa:102...
2016-09-18, 941👍, 0💬

OpenSSL "genpkey dsa_paramgen_bits:256" - DSA Short Keys
How to generate a new DSA key pair with a shorter key size using OpenSSL "genpkey" commands? If you need a new DSA key pair with a shorter key size for testing purpose, you can use the OpenSSL "genpkey -pkeyopt dsa_paramgen_bits:nnn" command. The "-pkeyopt dsa_paramgen_bits:nnn" option specifies the...
2017-12-13, 936👍, 0💬

OpenSSL "genpkey -paramfile" - Generate DH Key
How to generate a new DH private key using OpenSSL "genpkey" command? If you need a new DH private key in order to create a new certificate, you can use the OpenSSL "genpkey" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; genpkey -paramfile my_dh.prm -ou...
2017-09-08, 932👍, 0💬

OpenSSL "dsa" - Open Encrypted DSA Keys
How to open an encrypted DSA key file using OpenSSL "dsa" command? I was told the key file is DES encrypted and I know the password. If you are trying to open a password (encrypted) DSA key file using the "dsa" command, you will be prompted for the password as shown below: C:\Users\fyicenter&gt;...
2016-12-18, 930👍, 0💬

OpenSSL "genrsa 10240" - Generate RSA Long Keys
How to generate a new RSA key pair with a longer key size using OpenSSL "genrsa" command? If you need a new RSA key pair with a longer key size for testing purpose, you can use the OpenSSL "genrsa" command as shown below: C:\Users\fyicenter&gt;time The current time is: 22:03:25.43 C:\Users\fyice...
2017-01-29, 927👍, 0💬

OpenSSL "verify" - Validate Self-Signed Certificate
How to validate a self-signed certificate using OpenSSL "verify" command? You can validate your self-signed certificate using the OpenSSL "verify" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; verify rsa_test.crt rsa_test.crt: C = us, ST = NY, L = New Y...
2016-11-15, 911👍, 0💬

OpenSSL "req -text" Output and CSR Components
How to identify CSR components in OpenSSL "req -text" command output? OpenSSL "req -text" command output displays all components in a CSR with proper labels to help you identify each component. Below is a good example of the "req -text" command output: C:\Users\fyicenter&gt;\loc al\openssl\openss...
2016-11-23, 909👍, 0💬

OpenSSL "rsa -aes*" - Re-Encrypt RSA Keys
How to re-encrypt an RSA key file using OpenSSL "rsa" command? I want to change the encryption password, and maybe change the encryption algorithm. If you want to encrypt an existing RSA key file again, you can use the "rsa -aes*" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\open...
2017-01-11, 905👍, 0💬

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, 900👍, 0💬

OpenSSL "dsa -aes*" - Re-Encrypt DSA Keys
How to re-encrypt a DSA key file using OpenSSL "dsa" command? I want to change the encryption password, and maybe change the encryption algorithm. If you want to encrypt an existing DSA key file again, you can use the "dsa -aes*" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\opens...
2016-12-15, 892👍, 0💬

OpenSSL "rsa -text" - Print RSA Key in Text
How to print RSA private key contents in text format using OpenSSL "rsa" command? If you want to see contents of an RSA private key in text format, you can use the OpenSSL "rsa -text" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; rsa -in my_rsa.key -tex...
2017-02-03, 891👍, 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, 884👍, 0💬

OpenSSL "pkeyparam" Command Options
What can I use OpenSSL "pkeyparam" command for? What are options supported by the "pkeyparam" command? OpenSSL "pkeyparam" command is a utility to view and manage key generation parameter files. Note that "pkeyparam" command is replacing the "dsaparam" command. Here are options supported by the "pke...
2017-12-26, 881👍, 0💬

OpenSSL "req" - "prompt=yes" Mode with DN Defaults
How to specify DN value defaults when using the "prompt=yes" mode of the OpenSSL "req -new" command? If you are using "prompt=yes" mode, you can also set DN (Distinguished Name) default values in the configuration file. OpenSSL will prompt the user for DN fields with default values. The user can pre...
2016-10-29, 880👍, 0💬

OpenSSL "crl -text" - View CRL in Test Format
How to view a CRL in text format using the OpenSSL "crl" command? I want to see what certificates are listed in the CRL. If you want to view the content of a CRL (Certificate Revocation List), you can use the OpenSSL "crl -text" command as shown below: C:\Users\fyicenter&gt;\loc al\OpenSSL-Win32\...
2016-09-10, 876👍, 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   ⇒ Download OpenSSL 0.9.8h for Windo...
2016-09-04, 873👍, 0💬

OpenSSL "pkeyparam -text" - Print EC Parameters in Text
How to print EC key generation parameters in text format using OpenSSL "pkeyparam" command? If you want to see contents of a EC key generation parameter file in text format, you can use the OpenSSL "pkeyparam -text" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL...
2017-08-13, 871👍, 0💬

OpenSSL "ca" - Sign CSR with CA Certificate
How to sign a CSR with my CA certificate and private key using OpenSSL "ca" command? I think my configuration file has all the settings for the "ca" command. If you have you configuration file ready and all the required directories and files created, you can sign a CSR with your CA certificate and p...
2016-09-13, 871👍, 0💬

OpenSSL "ca -config" - Using Configuration File
Can I use my own configuration file when running "ca" command? Yes, you can specify your own configuration file using the "-config file" option when running the "ca" command. OpenSSL configuration file allows you to control the behavior of the "ca" command with the following options: certificate - T...
2016-09-09, 871👍, 0💬

OpenSSL "req -new -reqexts" - Test CSR V3 Extensions
How to run OpenSSL "req -new" command to generate CSR with x.509 v3 extensions? I have req_extensions option defined in the configuration file. If you want to run OpenSSL "req -new" command to generate CSR with x.509 v3 extensions, you can follow this example: C:\Users\fyicenter&gt;type test.cnf...
2016-10-25, 870👍, 0💬

OpenSSL Signing Documents with RSA Keys
What is the process of signing a document with RSA keys using OpenSSL commands? I was told to deliver a document with digital signature. Here are steps your need to follow to sign a document with your RSA private key using OpenSSL commands: 1. Get the document to be signed ready. 2. Generate a diges...
2017-04-04, 869👍, 0💬

OpenSSL "x509 -req" - Quick Way to Sign CSR
How to sign a CSR with OpenSSL "x509" command? I want a quick way to sign a CSR without setting the OpenSSL "ca" command. Normally, you should set up OpenSSL "ca" command to sign a CSR. But if you want quick alternative, you can use the "x509" command to sign a CSR as shown in the test below: C:\Use...
2018-02-01, 868👍, 0💬

OpenSSL "req -x509 -md5" - MD5 Digest for Signing
Can I using MD5 digest algorithm when generating a self-signed certificate using the OpenSSL "req -x509" command? Yes, you can use MD5 digest algorithm when generating a self-signed certificate using the OpenSSL "req -x509 -md5" command Without the "-md5" option, the default SHA256 digest algorithm ...
2016-11-05, 867👍, 0💬

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