Use a .csv file as a reference to make multiple self-signed certificates

Question

I wanted to preface this with; I am not a coder I am curious as to if I can take a Batch file I have that will generate a self signed certificate using OpenSSL and link it to a .CSV file to generate multiple certificates with a different file name. (My batch file also converts the .cer to .der as that is the format I need).

Ie

R001.der
R002.der
R123.der

My batch file does call another batch file that just references the directory of OpenSSL.

My Batch File:

setlocal enableextensions
@echo off
call vars.bat

echo #### Generating a new private key
openssl genrsa -out NewCertPrivKey.pem 2048

echo #### Converting private key to DER format
openssl rsa -in NewCertPrivKey.pem -inform PEM -out NewCertPrivKey.der -outform DER

echo #### Generating certificate request
openssl req -new -sha256 -key NewCertPrivKey.pem -out NewCertUnsigned.pem -days 3650

echo #### Signing the certificate request
openssl ca -verbose -days 3650 -out NewCertSigned.pem -keyfile demoCA\private\CAPrivKey.pem -cert demoCA\CACert.pem -infiles NewCertUnsigned.pem

echo #### Converting certificate to DER
openssl x509 -in NewCertSigned.pem -inform PEM -outform DER -out NewCertSigned.der

echo ##################################
echo The files to upload are NewCertSigned.der and NewCertPrivKey.der

Answer 1

Since you've omitted to clearly tell us the content of your .csv file, I'll assume your file is the R001.der.. script you've included.

What you could do is (as a batch):

for /f %%a in (yourcsvfilename) do call yourbatchfileasposted.bat %%a

which will execute your batchfile delivering a parameter of the content of the first token (space-separated string) from each line of your .csv file.

Note Executing as a batch will mean not perpetually re-typing the command, but if you wish to make thing hard and re-type the command from the prompt, then reduce each %%a to %a . Note that the case of the %a is case-sensitive.

AND replace each NewCertPrivKey , NewCertUnsigned , NewCertSigned in the filenames used within your batch with NewCertPrivKey%1 , NewCertUnsigned%1 , NewCertSigned%1 (ie. insert %1 after the main filename-body.

This will create filenames like NewCertPrivKeyR001.der.pem when your batch is executed with a parameter of R001.der (%1 means copy the first parameter verbatim )

If you want NewCertPrivKeyR001.pem from a parameter of R001.der then use %~n1 instead of %1 . This uses the "name" part of parameter 1 - that is, the part preceding the final .

Note that your modified batch file will still operate as the original because if you don't supply a parameter when you run it, the %1 is empty, so produces an empty string when copied.