gnupg: GPGSM IMPORT
5.6.8 Import certificates
-------------------------
To import certificates into the internal key database, the command
IMPORT [--re-import]
is used. The data is expected on the file descriptor set with the
'INPUT' command. Certain checks are performed on the certificate. Note
that the code will also handle PKCS#12 files and import private keys; a
helper program is used for that.
With the option '--re-import' the input data is expected to a be a
linefeed separated list of fingerprints. The command will re-import the
corresponding certificates; that is they are made permanent by removing
their ephemeral flag.