Documentation/config/gpg.txt

   1 gpg.program::
   2         Use this custom program instead of "`gpg`" found on `$PATH` when
   3         making or verifying a PGP signature. The program must support the
   4         same command-line interface as GPG, namely, to verify a detached
   5         signature, "`gpg --verify $file - <$signature`" is run, and the
   6         program is expected to signal a good signature by exiting with
   7         code 0, and to generate an ASCII-armored detached signature, the
   8         standard input of "`gpg -bsau $key`" is fed with the contents to be
   9         signed, and the program is expected to send the result to its
  10         standard output.
  11
  12 gpg.format::
  13         Specifies which key format to use when signing with `--gpg-sign`.
  14         Default is "openpgp" and another possible value is "x509".
  15
  16 gpg.<format>.program::
  17         Use this to customize the program used for the signing format you
  18         chose. (see `gpg.program` and `gpg.format`) `gpg.program` can still
  19         be used as a legacy synonym for `gpg.openpgp.program`. The default
  20         value for `gpg.x509.program` is "gpgsm".