Bug#301429: libgpgme11: gpgme_cancel() does not stop gpg process from finishing asynchronous call

[Igor Belyi]

Package: libgpgme11
Version: 1.0.2-1
Severity: important

Starting asynchronouse call and then canceling it with gpgme_cancel do cause
gpgme_wait() return Canceled error but leaves gpg process working and
finishing the call.

Attached is a slightly modified t-genkey test from the gpgme source showing
the problem.

Igor

-- System Information:
Debian Release: 3.1
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.11
Locale: LANG=C, LC_CTYPE=ru_RU.KOI8-R (charmap=KOI8-R)

Versions of packages libgpgme11 depends on:
ii  gnupg                       1.4.0-3      GNU privacy guard - a free PGP rep
ii  libc6                       2.3.2.ds1-20 GNU C Library: Shared libraries an
ii  libgpg-error0               1.0-1        library for common error values an

-- no debconf information

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <gpgme.h>

#include "t-support.h"


/* True if progress function printed something on the screen.  */
static int progress_called;

static void
progress (void *self, const char *what, int type, int current, int total)
{
  printf ("%c", type);
  fflush (stdout);
  progress_called++;
}


int 
main (int argc, char **argv)
{
  gpgme_ctx_t ctx;
  gpgme_error_t err;
  const char *parms = "<GnupgKeyParms format=\"internal\">\n"
    "Key-Type: DSA\n"
    "Key-Length: 1024\n"
    "Subkey-Type: ELG-E\n"
    "Subkey-Length: 4096\n"
    "Name-Real: Joe Tester\n"
    "Name-Comment: (pp=abc)\n"
    "Name-Email: [EMAIL PROTECTED]"
    "Expire-Date: 0\n"
    "Passphrase: abc\n"
    "</GnupgKeyParms>\n";
  gpgme_genkey_result_t result;

  if (argc != 2) {
    fprintf(stderr, "Usage: %s <sync|async>\n", argv[0]);
    exit(1);
  }

  init_gpgme (GPGME_PROTOCOL_OpenPGP);

  err = gpgme_new (&ctx);
  fail_if_err (err);

  gpgme_set_progress_cb (ctx, progress, NULL);

  if (argv[1][0] == 'a' || argv[1][0] == '0') {
  err = gpgme_op_genkey_start (ctx, parms, NULL, NULL);
  fail_if_err (err);

  err = 0xFFFF;
  progress_called = 0;
  do {
    if (progress_called > 100) {
      gpgme_cancel(ctx);
      printf ("(Cancel is called)\n");
      fflush(stdout);
    }
    gpgme_wait(ctx, &err, 0);
  } while (err == 0xFFFF);

  if (err != 0xFFFF)
    fail_if_err (err);
  } else {
  err = gpgme_op_genkey (ctx, parms, NULL, NULL);
  fail_if_err (err);
  }

  result = gpgme_op_genkey_result (ctx);
  if (!result)
    {
      fprintf (stderr, "%s:%d: gpgme_op_genkey_result returns NULL\n",
	       __FILE__, __LINE__);
      exit (1);
    }
  if (progress_called)
    printf ("\n");

  printf ("Generated key: %s (%s)\n", result->fpr ? result->fpr : "none",
	  result->primary ? (result->sub ? "primary, sub" : "primary")
	  : (result->sub ? "sub" : "none"));

  gpgme_release (ctx);
  return 0;
}