Script filling password from command line

Shell Programming and Scripting
1

I have this command that i am calling from php (exec()):

openssl pkcs12 -export -in cert.pem -inkey key.pem -out cred.p12

and then i need to insert password twice

Enter Export Password:

Verifying - Enter Export Password:

I need script that will fill the password inputs,because exec() will only do that command, but not insert password twice. Do you have any idea how should i do it?

2

You may be able to do it with popen:

$f=popen("openssl pkcs12 -export -in cert.pem -inkey key.pem -out cred.p12", "w");

fwrite($f, "password\n");
fwrite($f, "password\n");
pclose($f);

If that doesn't work, it may be demanding a terminal for password inputs, which would make automating it extremely difficult.

3

How about setting an environment variable with the password (eg putenv("INPASS=secret"); )
and using the -passin env: option of openssl -passin env:INPASS

4

Any other process on the system may be able to read that password in transit when you put it in the environment, though it's not as obvious as making it a parameter.