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OpenSSL "req" - "prompt=no" Mode
How to use the "prompt=no" mode of the OpenSSL "req -new" command? I want to specify DN field values directly in the configuration file. You can use "prompt=no" mode of the OpenSSL "req -new" command as shown below, if you set "prompt=no" and provide DN (Distinguished Name) field values in the confi...
2016-11-02, 1448👍, 0💬

OpenSSL "rsautl -encrypt" vs. "rsautl -verify"
What is the difference between "rsautl -encrypt" and "rsautl -verify" commands? There is only 1 difference between "rsautl -encrypt" and "rsautl -verify" commands: 1. "rsautl -encrypt" and "rsautl -verify" commands apply PKCS#1 v1.5 padding differently: "rsautl -encrypt" adds PKCS#1 v1.5 padding bef...
2017-03-11, 1418👍, 0💬

OpenSSL "req -new" - Generate New CSR
How to generate a new CSR (Certificate Signing Request) using OpenSSL "req -new" command? I have an RSA private key (including public key) ready. If you have a pair of RSA private key and public key, and you want to generate CSR (Certificate Signing Request) to represent your personal identity or se...
2016-12-14, 1413👍, 0💬

OpenSSL "dsaparam" - Generate DSA Parameters
How to generate a new DSA parameter file using OpenSSL "dsaparam" command? If you need a new DSA paramter file in order to create new DSA keys, you can use the OpenSSL "dsaparam" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; dsaparam -out my_dsa_2048.pr...
2017-01-07, 1410👍, 0💬

OpenSSL "req -new" - DN Fields for Personal Certificates
How to use additional DN fields to create CSR for personal certificates? You can set additional DN fields in the configuration file to allow OpenSSL "req -new" command to generate CSR for personal certificates. Additional DN fields are: emailAddress, name, surname, givenName, initials and dnQualifie...
2016-10-27, 1398👍, 0💬

OpenSSL "genrsa" - Generate RSA Key Pair
How to generate a new RSA key pair using OpenSSL "genrsa" command? If you need a new RSA key pair in order to create a new certificate, you can use the OpenSSL "genrsa" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; genrsa -out my_rsa.key Generating RSA ...
2017-02-24, 1390👍, 0💬

OpenSSL "dsaparam" Command Options
What can I use OpenSSL "dsaparam" command for? What are options supported by the "dsaparam" command? OpenSSL "dsaparam" command is a utility to generate DSA parameter files that are needed to generate DSA private key and public key pairs. Because generating DSA parameters is a slow job, DSA key gene...
2017-01-07, 1388👍, 0💬

OpenSSL "genpkey" Command Options
What can I use OpenSSL "genpkey" command for? What are options supported by the "genpkey" command? OpenSSL "genpkey" command is a utility to generate of private key or parameters. Note that "genpkey" command is replacing the old "genrsa", 'gendsa", "gendh" and "dsaparam" commands. Here are options s...
2018-01-24, 1380👍, 0💬

OpenSSL "ca -revoke" - Revoke a Certificate
How to revoke a certificate using the OpenSSL "ca" command? The certificate was signed by me with my CA certificate, but now it is no longer needed. If you want revoke a certificate that was signed by you previously, you can use the OpenSSL "ca -revoke" command to revoke it. Actually, the certificat...
2016-09-10, 1367👍, 0💬

OpenSSL "gendsa" Command Options
What can I use OpenSSL "gendsa" command for? What are options supported by the "gendsa" command? OpenSSL "gendsa" command is a utility to generate DSA (Digital Signature Algorithm) private key and public key pairs. Here are options supported by the "gendsa" command: C:\Users\fyicenter&gt;\loc al\...
2017-01-07, 1355👍, 0💬

OpenSSL "pkey" - Open Encrypted RSA Keys
How to open an encrypted RSA key file using OpenSSL "pkey" command? I was told the key file is DES encrypted and I know the password. If you are trying to open a password (encrypted) RSA key file using the "pkey" command, you will be prompted for the password as shown below: C:\Users\fyicenter&g...
2017-12-26, 1349👍, 0💬

OpenSSL "req -x509 -days" - Longer Self-Signed Certificate
Can I sign my own CSR with a longer expiration date using the OpenSSL "req -x509" command? I want to use this certificate as an internal root CA for 10 years. Yes, you can sign you own CSR (Certificate Sign Request) with a longer expiration date using the OpenSSL "req -x509 -days" command as shown b...
2016-11-11, 1331👍, 0💬

General Information about OpenSSL
Where to find general information OpenSSL? I want to get basic understanding of OpenSSL. Here is a collection of tutorials that provides general information about OpenSSL compiled by FYIcenter.com team. What Is OpenSSL Download and Install OpenSSL Fulgan Binary for Windows Run OpenSSL Commands List ...
2018-01-19, 1300👍, 0💬

OpenSSL "genpkey -algorithm rsa" - Generate RSA Key
How to generate a new RSA private key using OpenSSL "genpkey" command? If you need a new RSA 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 -algorithm rsa -out my...
2018-01-27, 1287👍, 0💬

OpenSSL "genpkey dh_paramgen_prime_len:3072" - DH Long Keys
How to generate a new DH key pair with a longer key size using OpenSSL "genpkey" command? If you need a new DH key pair with a longer key size for testing purpose, you can use the OpenSSL "genpkey" command as shown below: C:\Users\fyicenter&gt;time The current time is: 22:17:06.45 C:\Users\fyice...
2017-07-25, 1236👍, 0💬

OpenSSL "pkey" Command Options
What can I use OpenSSL "pkey" command for? What are options supported by the "pkey" command? OpenSSL "pkey" command is a utility to view and manage private keys and public keys. Note that "pkey" command is replacing the old "rsa", and "dsa" commands. Here are options supported by the "pkey" command:...
2018-01-16, 1234👍, 0💬

OpenSSL "genpkey rsa_keygen_bits:10240" - RSA Long Keys
How to generate a new RSA key pair with a longer key size using OpenSSL "genpkey" command? If you need a new RSA key pair with a longer key size for testing purpose, you can use the OpenSSL "genpkey" command as shown below: C:\Users\fyicenter&gt;time The current time is: 18:43:27.27 C:\Users\fyi...
2018-01-13, 1219👍, 0💬

OpenSSL "req" - "prompt=yes" Mode
How to use the "prompt=yes" mode of the OpenSSL "req -new" command? I want to enter DN values at the command prompt. You can use "prompt=yes" mode of the OpenSSL "req -new" command as shown below, if you set "prompt=yes" and provide DN (Distinguished Name) field prompts in the configuration file. C:...
2016-10-30, 1216👍, 0💬

OpenSSL "dsa -text" - Print DSA Key in Text
How to print DSA private key contents in text format using OpenSSL "dsa" command? If you want to see contents of a DSA private key in text format, you can use the OpenSSL "dsa -text" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; dsa -in my_dsa_2048.key ...
2017-01-05, 1203👍, 0💬

OpenSSL "req -text" - Print CSR in Text
How to print CSR information in text format using OpenSSL "req -text" command? If you want to see contents of a CSR file in text format, you can use the OpenSSL "req -text" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; req -in my_rsa.csr -text -noout Ce...
2016-12-04, 1179👍, 0💬

OpenSSL "genpkey -paramfile" - Generate EC Key
How to generate a new EC private key using OpenSSL "genpkey" command? If you need a new EC 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_ec.prm -ou...
2017-08-08, 1178👍, 0💬

OpenSSL "x509 -x509toreq" - Conver Certificate to CSR
How to convert a certificate to a CSR using OpenSSL "x509" command? I want to generate a CSR with the same information as my existing certificate. You can convert a certificate to a CSR using the OpenSSL "x509 -x509toreq" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeO...
2018-02-14, 1175👍, 0💬

OpenSSL "gendsa" and "dsa" Commands
Where to find tutorials on using OpenSSL "gendsa" and "dsa" commands? Here is a collection of tutorials on using OpenSSL "gendsa" and "dsa" commands compiled by FYIcenter.com team. Note that "gendsa" and "dsa" commands are superseded by "genpkey" and "pKey" commands now. Stop using "gendsa" and "dsa...
2017-01-11, 1163👍, 0💬

OpenSSL "rsautl" Command Options
What can I use OpenSSL "rsautl" command for? What are options supported by the "rsautl" command? OpenSSL "rsautl" command is a utility to sign, verify, encrypt and decrypt data using RSA private key and public key. Here are options supported by the "rsautl" command: C:\Users\fyicenter&gt;\loc al\...
2017-06-16, 1162👍, 0💬

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