GPG Error Code 2

GPG is always returning 2 at the result. My code is as follows

$cmd = "/usr/bin/gpg -a --recipient $to -e -o $outfile $infile";

Where outfile is the file where the encrypted data will be written and infile is the unencrypted data.

I don't kn开发者_StackOverflow社区ow why this is happening. Can anyone please tell me what's wrong. Thanks.

GPG is asking whether you want to continue on with the encryption using an unsigned key. Since no user can input Y it produces an error.

To fix this put the following switches

--yes and --always-trust

See this message: http://lists.gnupg.org/pipermail/gnupg-users/2008-January/032410.html

It appears to be a permission problem. gpg is trying to access a directory that it can't have access to, so it fails with a fatal error. (error code 2)

You can fix that by specifying a homedir directive with a directory writable by gpg. Like this:

$cmd = "/usr/bin/gpg -a --recipient $to -e -o $outfile $infile --homedir /path/to/dir";

Information from man gpg:

--homedir directory
Set the name of the home directory to directory

If this option is not used it defaults to "~/.gnupg". It does not make sense to use this in a options file. This also overrides the environment variable $GNUPGHOME.

You also might want to concider adding key to trusted keys list:

gpg.exe --edit-key KEY_NAME
trust
5 (level of trust)
Y
Save

I've had some problems of --always-trust parameter not functioning properly on XP windows, this helped me solve the problem.

I had the same problem, but for the decoding command

At first and general, you can get the error message by redirecting stderr to stdout.

$cmd = "/usr/bin/gpg -a --recipient $to -e -o $outfile $infile 2>&1";

Then you can modify gpg's parameters to suit your needs. Because I had a files encrypted with a key with pass phrase I had to add several parameters.

I started with

gpg  -o $out -d $path

But it complained, that it can not open tty, then with --no-tty it outputs some other errors and finally the command for decoding files with key with pass phrase is

gpg --batch --passphrase $pass_phrase --no-tty -o $outfile -d $path_to_encoded_file

I hope this helps someone.