gpgsm: Print PROGRESS status lines.

* common/ksba-io-support.c (struct writer_cb_parm_s): Add field
progress.
(struct gnupg_ksba_io_s): Add field is_writer.
(update_write_progress): New.
(base64_writer_cb, plain_writer_cb): Call update_write_progress.
(base64_finish_write): Ditto.
(gnupg_ksba_create_writer): Set is_writer.
(gnupg_ksba_set_progress_cb): New.
(gnupg_ksba_set_total): New.
* common/ksba-io-support.h (gnupg_ksba_progress_cb_t): New type.
* sm/server.c (gpgsm_status2): Return error from statusfp writes.
(gpgsm_progress_cb): New.
* sm/decrypt.c (gpgsm_decrypt): Set progress handler.
* sm/encrypt.c (gpgsm_encrypt): Ditto.
* sm/sign.c (gpgsm_sign): Ditto.
* sm/verify.c (gpgsm_verify): Ditto.
--

GnuPG-bug-id: 6534

common/ksba-io-support.h

@@ -25,6 +25,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: (LGPL-3.0-or-later OR GPL-2.0-or-later)
  */
 
 #ifndef GNUPG_KSBA_IO_SUPPORT_H
@@ -42,6 +43,10 @@
 /* Context object.  */
 typedef struct gnupg_ksba_io_s *gnupg_ksba_io_t;
 
+/* Progress callback type.  */
+typedef gpg_error_t (*gnupg_ksba_progress_cb_t)(ctrl_t ctrl,
+                                                uint64_t current,
+                                                uint64_t total);
 
 
 gpg_error_t gnupg_ksba_create_reader (gnupg_ksba_io_t *ctx,
@@ -57,10 +62,13 @@ gpg_error_t gnupg_ksba_create_writer (gnupg_ksba_io_t *ctx,
                                       const char *pem_name,
                                       estream_t stream,
                                       ksba_writer_t *r_writer);
-
 gpg_error_t gnupg_ksba_finish_writer (gnupg_ksba_io_t ctx);
 void gnupg_ksba_destroy_writer (gnupg_ksba_io_t ctx);
 
+void gnupg_ksba_set_progress_cb (gnupg_ksba_io_t ctx,
+                                 gnupg_ksba_progress_cb_t cb, ctrl_t ctrl);
+void gnupg_ksba_set_total (gnupg_ksba_io_t ctx, uint64_t total);
+