Shell script to create multiple OpenSSL Certificates

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# 1  
Old 08-18-2011
Question Shell script to create multiple OpenSSL Certificates

I need to create a script that will generate a bunch of OpenSSL Certificates signed by my own CA. The certificates being generated are for testing purposes only. But what I need is the following

Root CA

I need basically 64 combinations. Each root CA must sign each possible client CA of 512, 768, 1024, 1280, 1536, 1792, 2048 and 4096. for example

ROOT CA 512 to Client CA 512, 768, etc
ROOT CA 768 to Client CA 512, 768 etc

I'm not sure how to go about the script. Suggestions at this point would be of great help. Bash, or Perl would be fine.

Thanks for any and all help on this.
# 2  
Old 08-19-2011
Can you give an example for step by step certification creation in normal scenario without any script? That would help better to understand requirement and feasibility of script.
# 3  
Old 08-19-2011
Request Client Certificate

openssl genrsa -out client512.key 512 openssl req -new -key client.key -out client512.csr -config openssl.cnf Sign Certifiicate

openssl x509 -req -days 365 -CA ca512.crt -CAkey ca512.key -CAcreateserial -in client512.csr -out client512512.crt

openssl x509 -req -days 365 -CA ca768.crt -CAkey ca768.key -CAcreateserial -in client512.csr -out client768512.crt

openssl x509 -req -days 365 -CA ca1024.crt -CAkey ca1024.key -CAcreateserial -in client512.csr -out client1024512.crt

And ETC down the list.
Then do the next client Cert of 768 and follow the same procedure and so on.

Hope that helps some.

# 4  
Old 08-19-2011
for RootCA in 512 768 1024 1280 1536 1792 2048 4096
  openssl genrsa -out client${RootCA}.key ${RootCA} openssl req -new -key client.key -out client${RootCA}.csr -config openssl.cnf Sign Certifiicate
  for ClientCA in 512 768 1024 1280 1536 1792 2048 4096
     openssl x509 -req -days 365 -CA ca${ClientCA}.crt -CAkey ca${ClientCA}.key -CAcreateserial -in client${RootCA}.csr -out client${ClientCA}${RootCA}.crt

# 5  
Old 08-19-2011
Almost there can you take a look?

Ok thanks for the reply. So I decided to try and automate the creation of the ROOT CA as well. Then I will continue on with the Clients Certs. Please take a look below its almost there but not quite working.

RootCA={512 768 1024 1280 1536 1792 2048 4096}
ClientCA={512 768 1024 1280 1536 192 2048 4096}
OfRootKey= ~/Certs/Root-CA/private
OfRootCA= ~/Certs/Root-CA
OfClientKey= ~/Certs/Client/private
OfClient= ~/Certs/Client
Config= ~/Certs/Root-CA/conf

#Create ROOT CA 
for $RootCA 
openssl req -newe -x509 -days $Days -extensions v3_ca -keyout $OfRootKey/cakey${RootCA}.key -out $OfRootCA/cacert${RootCA}.pem -config $Config/openssl${RootCA}.conf

There errors are
./ line 2: 768: command not found
./ line 3: 768: command not found
./ line 5: /home/kris/Certs/Root-CA/private: Is a directory
./ line 6: /home/kris/Certs/Root-CA: Is a directory
./ line 7: /home/kris/Certs/Client/private: Is a directory
./ line 8: /home/kris/Certs/Client: Is a directory
./ line 9: /home/kris/Certs/Root-CA/conf: Is a directory
./ line 15: `$RootCA': not a valid identifier
./ line 16: syntax error near unexpected token `done'
./ line 16: `done'

---------- Post updated at 02:47 PM ---------- Previous update was at 12:23 PM ----------

Ok I'm very close here. The script is now creating all the RootCA certificates but it only creats 8 of the client certificates. Because its only signing them with the last RootCA of 4096. I need it to sign each one with each RootCA as well. I see why its happening just not sure how to fix it. I followed the logic so I get why it happens just not sure how to correct yet.

# RootCA={512 768 1024 1280 1536 1792 2048 4096}
# ClientCA={512 768 1024 1280 1536 192 2048 4096}

function Create_Root_CA {
#Create ROOT CA 
Echo Creating Root Certificates
for RootCA in 512 768 1024 1280 1536 1792 2048 4096
openssl req -new -x509 -days $Days -extensions v3_ca -keyout $OfRootKey/cakey${RootCA}.key -out $OfRootCA/cacert${RootCA}.pem -config $Config/openssl${RootCA}.conf

function Create_Client_Req {
echo Creating Clients Requests
for RootCA in 512 768 1024 1280 1536 1792 2048 4096
openssl req -new -newkey rsa:$RootCA -nodes -keyout $OfClientReq/client${RootCA}.key -out $OfClientReq/client${RootCA}.csr -config $Config/openssl$RootCA.conf

function Sign_Client_Certs {
echo Signing Clients Certificates
for ClientCA in 512 768 1024 1280 1536 1792 2048 4096
     openssl x509 -req -days $Days -CA $OfRootCA/cacert${ClientCA}.pem -CAkey $OfRootKey/cakey${ClientCA}.key -CAcreateserial -in $OfClientReq/client${RootCA}.csr -out $OfClient/client${ClientCA}${RootCA}.pem


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