Common OpenSSL Commands with Keys and Certificates

OpenSSL Command to Generate Private Key openssl genrsa -out yourdomain.key 2048 OpenSSL Command to Check your Private Key openssl rsa -in privateKey.key -check OpenSSL Command to Generate CSR. If you have generated Private Key: openssl req -new -key yourdomain.key -out yourdomain.csr. Once you execute this command, you’ll be asked additional. Extracting certificate and private key information from a Personal Information Exchange (.pfx) file with OpenSSL: Open Windows File Explorer. Copy your.pfx file to a computer that has OpenSSL installed, notating the file path. Certificate.pfx files are usually password protected. Obtain the password for your.pfx file. The same is true of key files. So to generate a key with explicit parameters: openssl ecparam -name brainpoolP512t1 -genkey -noout -out brainpoolP512t1-key.pem -paramenc explicit This key file can now be processed by versions of openssl that do not know about the brainpool curve. Sep 11, 2018  You can use Java key tool or some other tool, but we will be working with OpenSSL. To generate a public and private key with a certificate signing request (CSR), run the following OpenSSL command. Apache) you need to convert the.pfx file and separate the.key and.crt/.cer. You will need to break the file you got from the CA into two parts, one containing the certificate block called 'certificate.txt' and and one containing the private key block called 'key.txt': openssl pkcs12 -export -out mycertkey.p12 -in certificate.txt -inkey key.txt Once you have the PKCS#12 format file you can import it into Windows.

Create a pkcs12 (.pfx or.p12) from OpenSSL files (.pem,.cer,.crt.) You have a private key file in an openssl format and have received your SSL certificate. You'd like now to create a PKCS12 (or.pfx) to import your certificate in an other software? Here is the procedure! Find the private key file (xxx.key) (previously generated along. Using openssl, I've created a private key as follows: openssl genrsa -out myKey.pem Then, to generate the csr demanded by the CA, I've executed the following: openssl req -new -key myKey.pem -out cert.csr The CA responded with a certificate which I stored in a file named myCert.cer.

Generate RSA private key with certificate in a single command

Generate Certificate Signing Request (CSR) from private key with passphrase

Generate RSA private key (2048 bit)

Generate a Certificate Signing Request (CSR)

Generate RSA private key (2048 bit) and a Certificate Signing Request (CSR) with a single command

Convert private key to PEM format

Generate a self-signed certificate that is valid for a year with sha256 hash

View details of a RSA private key

View details of a CSR

View details of a Certificate

View details of a Certificate in DER format

Convert a DER file (.crt .cer .der) to PEM

Convert a PEM file to DER

This is a simple doc on generating certificates with OpenSSL.It focus on three different certificate types, exactly the classic RSA and ECDSA and the relative new RSASSA-PSS.It generates a CA and an end entity (EE) certificate for each type.The content is straightforward and concise: Commands with comments.

Please note that the commands on different certificate types are quite similar.Especially, the private key generation on different algorithms just uses tool genpkey, though some algorithms (e.g. RSA) have their own tool (e.g. genrsa).This is deliberate. In further development, these commands could be abstracted as a single common certificate generation facility.

OpenSSL configurations

Private Key Definition

RSA certificates

EC certificates

These commands and options are quit similar to those in section RSA certificates.The main difference is the private key generation.

Openssl Generate Private Key From Cer To Crt

RSASSA-PSS certificates

Openssl Generate Private Key From Cer To Pem

These commands and options are almost the same as those in section RSA certificates.The only difference is the public key algorithm, of course rsa-pss here.

DSA certificates

Openssl Generate Certificate From Private Key

These commands and options are quite similar to those in section RSA certificates.The main difference is that it needs to generate key parameters before generating key.