Need help building a new client certificate from an existing CA

Support forum for Easy-RSA certificate management suite.
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p4l1ndr0m3
OpenVpn Newbie
Posts: 7
Joined: Thu Jun 23, 2016 5:09 am

Need help building a new client certificate from an existing CA

Post by p4l1ndr0m3 » Mon Jan 30, 2017 5:05 pm

I ran the command prompt as administrator and navigated to the correct folder. I just want to build a new client cert for a new computer to access the exiating VPN. See below for what happens. TIA

Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Windows\system32>cd "C:\Program Files\OpenVPN\easy-rsa"

C:\Program Files\OpenVPN\easy-rsa>build-key user01
C:\Program Files\OpenVPN\easy-rsa
WARNING: can't open config file: /etc/ssl/openssl.cnf
req [options] <infile >outfile
where options are
-inform arg input format - DER or PEM
-outform arg output format - DER or PEM
-in arg input file
-out arg output file
-text text form of request
-pubkey output public key
-noout do not output REQ
-verify verify signature on REQ
-modulus RSA modulus
-nodes don't encrypt the output key
-engine e use engine e, possibly a hardware device
-subject output the request's subject
-passin private key password source
-key file use the private key contained in file
-keyform arg key file format
-keyout arg file to send the key to
-rand file;file;...
load the file (or the files in the directory) into
the random number generator
-newkey rsa:bits generate a new RSA key of 'bits' in size
-newkey dsa:file generate a new DSA key, parameters taken from CA in 'file'
-newkey ec:file generate a new EC key, parameters taken from CA in 'file'
-[digest] Digest to sign with (md5, sha1, md2, mdc2, md4)
-config file request template file.
-subj arg set or modify request subject
-multivalue-rdn enable support for multivalued RDNs
-new new request.
-batch do not ask anything during request generation
-x509 output a x509 structure instead of a cert. req.
-days number of days a certificate generated by -x509 is valid for.
-set_serial serial number to use for a certificate generated by -x509.
-newhdr output "NEW" in the header lines
-asn1-kludge Output the 'request' in a format that is wrong but some CA's
have been reported as requiring
-extensions .. specify certificate extension section (override value in config
file)
-reqexts .. specify request extension section (override value in config file
)
-utf8 input characters are UTF8 (default ASCII)
-nameopt arg - various certificate name options
-reqopt arg - various request text options

WARNING: can't open config file: /etc/ssl/openssl.cnf
unknown option -config
usage: ca args

-verbose - Talk alot while doing things
-config file - A config file
-name arg - The particular CA definition to use
-gencrl - Generate a new CRL
-crldays days - Days is when the next CRL is due
-crlhours hours - Hours is when the next CRL is due
-startdate YYMMDDHHMMSSZ - certificate validity notBefore
-enddate YYMMDDHHMMSSZ - certificate validity notAfter (overrides -days)
-days arg - number of days to certify the certificate for
-md arg - md to use, one of md2, md5, sha or sha1
-policy arg - The CA 'policy' to support
-keyfile arg - private key file
-keyform arg - private key file format (PEM or ENGINE)
-key arg - key to decode the private key if it is encrypted
-cert file - The CA certificate
-selfsign - sign a certificate with the key associated with it
-in file - The input PEM encoded certificate request(s)
-out file - Where to put the output file(s)
-outdir dir - Where to put output certificates
-infiles .... - The last argument, requests to process
-spkac file - File contains DN and signed public key and challenge
-ss_cert file - File contains a self signed cert to sign
-preserveDN - Don't re-order the DN
-noemailDN - Don't add the EMAIL field into certificate' subject
-batch - Don't ask questions
-msie_hack - msie modifications to handle all those universal strings
-revoke file - Revoke a certificate (given in file)
-subj arg - Use arg instead of request's subject
-utf8 - input characters are UTF8 (default ASCII)
-multivalue-rdn - enable support for multivalued RDNs
-extensions .. - Extension section (override value in config file)
-extfile file - Configuration file with X509v3 extentions to add
-crlexts .. - CRL extension section (override value in config file)
-engine e - use engine e, possibly a hardware device.
-status serial - Shows certificate status given the serial number
-updatedb - Updates db for expired certificates
Could Not Find C:\*.old

C:\Program Files\OpenVPN\easy-rsa>

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TinCanTech
OpenVPN Protagonist
Posts: 2828
Joined: Fri Jun 03, 2016 1:17 pm

Re: Need help building a new client certificate from an existing CA

Post by TinCanTech » Mon Jan 30, 2017 5:45 pm

what is in the file build-key.bat ?

p4l1ndr0m3
OpenVpn Newbie
Posts: 7
Joined: Thu Jun 23, 2016 5:09 am

Re: Need help building a new client certificate from an existing CA

Post by p4l1ndr0m3 » Mon Jan 30, 2017 6:35 pm

@echo off
cd %HOME%
rem build a request for a cert that will be valid for ten years
openssl req -days 3650 -nodes -new -keyout %KEY_DIR%\%1.key -out %KEY_DIR%\%1.csr -config %KEY_CONFIG%
rem sign the cert request with our ca, creating a cert/key pair
openssl ca -days 3650 -out %KEY_DIR%\%1.crt -in %KEY_DIR%\%1.csr -config %KEY_CONFIG%
rem delete any .old files created in this process, to avoid future file creation errors
del /q %KEY_DIR%\*.old

User avatar
TinCanTech
OpenVPN Protagonist
Posts: 2828
Joined: Fri Jun 03, 2016 1:17 pm

Re: Need help building a new client certificate from an existing CA

Post by TinCanTech » Mon Jan 30, 2017 6:49 pm

What about the file README.txt ?

p4l1ndr0m3
OpenVpn Newbie
Posts: 7
Joined: Thu Jun 23, 2016 5:09 am

Re: Need help building a new client certificate from an existing CA

Post by p4l1ndr0m3 » Mon Jan 30, 2017 7:09 pm

THANK YOU! The Readme file told me I had to do vars first:

C:\Program Files\OpenVPN\easy-rsa>vars

C:\Program Files\OpenVPN\easy-rsa>build-key user01
WARNING: can't open config file: /etc/ssl/openssl.cnf
Loading 'screen' into random state - done
Generating a 1024 bit RSA private key
.......++++++
.................................++++++
writing new private key to 'keys\user01.key'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [US]:

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