Is It Possible To Generate Key File From Crt
May 12, 2014 Generating a New CSR from Existing CRT and Key If there is an existing certificate and an existing key, a new CSR with the same information (organizational information, FQDN, etc.) can be easily generated: openssl x509 -x509toreq -in crt -signkey key -out. Traditionally, private keys on Linux-based operating systems (Ubuntu, Debian, CentOS, RedHat, etc.) are openssl generated keys with the crypto toolkit and saved into files with the.key or.pem extension. However, since specific extensions are not obligatory for simple text files on Linux systems, the private key code can be put into a file with virtually any name. In this section we will generate a master CA certificate/key, a server certificate/key, and certificates/keys for 3 separate clients. For PKI management, we will use easy-rsa 2, a set of scripts which is bundled with OpenVPN 2.2.x and earlier. No, it is not possible to generate the private.key file from the certificate.crt file. You will need to generate a new key and a new certificate, if the below does not apply to you. You may ask your certificate provider if they're willing to re-generate your certificate, a few companies offer the possibility. The public key will be signed by a Certification Authority, and the result is a digital certificate (which can be in a CRT file) My point is: if you have a CRT file (aka certificate), it means a key pair was already generated and signed by a Certification Authority. There's no way to generate a new key from it (because it already has a key). Is it possible to apply a SSL Certificate without CSR. Ask Question. I used to generate a CSR file on my server. This CSR was sent to the registrar. Then, the registrar gaves me a certificate. Thanks, how should i do if CA gives me CSR, Private key and CRT file? – Bob5421 Mar 14 '19 at 13:51. CA will never give you private key, because.
How do I make my own bundle file from CRT files?
Answer: You may do this using you favorite text editor or by using the command line.
Example:
# Root CA Certificate - AddTrustExternalCARoot.crt
# Intermediate CA Certificate 1 - ComodoRSAAddTrustCA.crt OR ComodoECCAddTrustCA.crt
# Intermediate CA Certificate 2 - ComodoRSADomain/Organization/ExtendedvalidationSecureServerCA.crt OR ComodoRSAECCDomain/Organization/ExtendedvalidationSecureServerCA.crt
# Intermediate CA Certificate 3 - ComodoSHA256SecureServerCA.crt
# Your SSL Certificate - yourDomain.crt
Note: You will not need your SSL certificate for this exercise.
GUI Text Editor
1. Open All files in a text editor. (Remember, not your domain certificate.)
2. Create a new blank text file.
3. Copy contents of all files in reverse order and paste them into the new file.
Example: Intermediate 3, Intermediate 2, Intermediate 1, Root Certificate.
4. Save newly created file as 'yourDomain.ca-bundle'.
Command Line
Linux or UNIX-like Operating Systems:
-- cat ComodoRSAAddTrustCA.crt ComodoRSADomain/Organization/ExtendedvalidationSecureServerCA.crt AddTrustExternalCARoot.crt > yourDomain.ca-bundle
Or
Crt And Key File
-- cat ComodoSHA256SecureServerCA.crt AddTrustExternalCARoot.crt > yourDomain.ca-bundle
Windows or DOS:
-- copy ComodoRSAAddTrustCA.crt + ComodoRSADomain/Organization/ExtendedvalidationSecureServerCA.crt + AddTrustExternalCARoot.crt yourDomain.ca-bundle
Generate Private Key File
Or
-- copy ComodoSHA256SecureServerCA.crt + AddTrustExternalCARoot.crt yourDomain.ca-bundle
Note: 'yourDomain.ca-bundle' is only a place holder file name. You may call it anything you want.
Related Items
* Root & Intermediate Certificates