core: Support direct encryption of file with gpg
* src/gpgme.h.in (GPGME_ENCRYPT_FILE): New encryption flag. * src/engine-gpg.c (gpg_encrypt, gpg_encrypt_sign): Check for incompatible flags. Pass filename instead of fd to gpg when new flag is set. * src/engine-gpgsm.c (gpgsm_encrypt): Return error if new flag is set. * src/engine-uiserver.c (uiserver_encrypt): Ditto. * tests/run-encrypt.c (show_usage): New option --direct-file-io. (main): Parse new option. Make gpg read the input file itself if the option is given.
With this change the gpgme_op_encrypt* and gpgme_op_encrypt_sign*
functions gain the possibility to make gpg read the data to (sign and)
encrypt directly from a file instead of from an input FD to which it is
written by gpgme.
- GnuPG-bug-id: T6550