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How can I encrypt three different files, each with its own public key?

For instance, there are three companies (X, Y and Z). Each company sends me its own public key.

I want to send a file to each company and encrypt it using the correct matching key.

1- encrypt file1.txt by x.pub and send it to company X

2- encrypt file2.txt by y.pub and send it to company Y

3- encrypt file3.txt by z.pub and send it to company Z

How can I do the above in a Windows batch file?

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1 Answer 1

up vote 6 down vote accepted

The problem is that you first have to import the keys in your keyring. After that it's quite easy to automate.

I believe that this should work:

gpg --no-default-keyring --keyring x.gpg --import x.pub
gpg --no-default-keyring --keyring x.gpg --encrypt file1.txt

gpg --no-default-keyring --keyring y.gpg --import y.pub
gpg --no-default-keyring --keyring y.gpg --encrypt file2.txt

gpg --no-default-keyring --keyring z.gpg --import z.pub
gpg --no-default-keyring --keyring z.gpg --encrypt file3.txt

Do note that the import step is only required the first time (assuming that you don't delete the x.gpg files.

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Looks right to me, three files, three keys. Not a script as such, but does the job! –  Coops Mar 12 '11 at 16:50
    
when i execute the following command the following error appear :- C:\>"C:\Program Files\GNU\GnuPG\gpg.exe" -r --no-default-keyring --keyring bank_1.gpg --encrypt D:\SSC\keys\port.txt gpg: --no-default-keyring: skipped: public key not found gpg: D:\SSC\keys\port.txt: encryption failed: public key not found –  Mohammad AL-Rawabdeh Mar 13 '11 at 11:04
    
@Mohammad AL-Rawabdeh: apparently gpg is having problems locating your public key in the keyring. Are you sure the path is correct? Did the --import step run without errors? –  Wolph Mar 13 '11 at 19:12
    
yes --import run without any error –  Mohammad AL-Rawabdeh Mar 14 '11 at 8:29

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