/* returns 1 if Mutt can't display this type of data, 0 otherwise */
int mutt_needs_mailcap (BODY * m)
{
  switch (m->type) {
  case TYPETEXT:

    if (!ascii_strcasecmp ("plain", m->subtype) ||
        !ascii_strcasecmp ("rfc822-headers", m->subtype) ||
        !ascii_strcasecmp ("enriched", m->subtype))
      return 0;
    break;

  case TYPEAPPLICATION:
    if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp (m))
      return 0;
    if ((WithCrypto & APPLICATION_SMIME) && mutt_is_application_smime (m))
      return 0;
    break;

  case TYPEMULTIPART:
  case TYPEMESSAGE:
    return 0;
  }

  return 1;
}
Exemple #2
0
/**
 * crypt_query - Check out the type of encryption used
 * @param m Body of email
 * @retval num Flags, see #SecurityFlags
 * @retval 0   Error (#SEC_NO_FLAGS)
 *
 * Set the cached status values if there are any.
 */
SecurityFlags crypt_query(struct Body *m)
{
  if (!WithCrypto || !m)
    return SEC_NO_FLAGS;

  SecurityFlags rc = SEC_NO_FLAGS;

  if (m->type == TYPE_APPLICATION)
  {
    if (WithCrypto & APPLICATION_PGP)
      rc |= mutt_is_application_pgp(m);

    if (WithCrypto & APPLICATION_SMIME)
    {
      rc |= mutt_is_application_smime(m);
      if (rc && m->goodsig)
        rc |= SEC_GOODSIGN;
      if (rc && m->badsig)
        rc |= SEC_BADSIGN;
    }
  }
  else if (((WithCrypto & APPLICATION_PGP) != 0) && (m->type == TYPE_TEXT))
  {
    rc |= mutt_is_application_pgp(m);
    if (rc && m->goodsig)
      rc |= SEC_GOODSIGN;
  }

  if (m->type == TYPE_MULTIPART)
  {
    rc |= mutt_is_multipart_encrypted(m);
    rc |= mutt_is_multipart_signed(m);
    rc |= mutt_is_malformed_multipart_pgp_encrypted(m);

    if (rc && m->goodsig)
      rc |= SEC_GOODSIGN;
  }

  if ((m->type == TYPE_MULTIPART) || (m->type == TYPE_MESSAGE))
  {
    SecurityFlags u = m->parts ? SEC_ALL_FLAGS : 0; /* Bits set in all parts */
    SecurityFlags w = SEC_NO_FLAGS;                 /* Bits set in any part  */

    for (struct Body *b = m->parts; b; b = b->next)
    {
      const SecurityFlags v = crypt_query(b);
      u &= v;
      w |= v;
    }
    rc |= u | (w & ~SEC_GOODSIGN);

    if ((w & SEC_GOODSIGN) && !(u & SEC_GOODSIGN))
      rc |= SEC_PARTSIGN;
  }

  return rc;
}
Exemple #3
0
static void set_copy_flags (HEADER *hdr, int decode, int decrypt, int *cmflags, int *chflags)
{
  *cmflags = 0;
  *chflags = CH_UPDATE_LEN;
  
  if (WithCrypto && !decode && decrypt && (hdr->security & ENCRYPT))
  {
    if ((WithCrypto & APPLICATION_PGP)
        && mutt_is_multipart_encrypted(hdr->content))
    {
      *chflags = CH_NONEWLINE | CH_XMIT | CH_MIME;
      *cmflags = M_CM_DECODE_PGP;
    }
    else if ((WithCrypto & APPLICATION_PGP)
              && mutt_is_application_pgp (hdr->content) & ENCRYPT)
      decode = 1;
    else if ((WithCrypto & APPLICATION_SMIME)
             && mutt_is_application_smime(hdr->content) & ENCRYPT)
    {
      *chflags = CH_NONEWLINE | CH_XMIT | CH_MIME;
      *cmflags = M_CM_DECODE_SMIME;
    }
  }

  if (decode)
  {
    *chflags = CH_XMIT | CH_MIME | CH_TXTPLAIN;
    *cmflags = M_CM_DECODE | M_CM_CHARCONV;

    if (!decrypt)	/* If decode doesn't kick in for decrypt, */
    {
      *chflags |= CH_DECODE;	/* then decode RFC 2047 headers, */

      if (option (OPTWEED))
      {
	*chflags |= CH_WEED;	/* and respect $weed. */
	*cmflags |= M_CM_WEED;
      }
    }
  }
}
Exemple #4
0
/* args:
 *     fp      If not NULL, file containing the template
 *     ctx     If fp is NULL, the context containing the header with the template
 *     newhdr  The template is read into this HEADER
 *     hdr     The message to recall/resend
 *     resend  Set if resending (as opposed to recalling a postponed msg).
 *             Resent messages enable header weeding, and also
 *             discard any existing Message-ID and Mail-Followup-To.
 */
int mutt_prepare_template (FILE *fp, CONTEXT *ctx, HEADER *newhdr, HEADER *hdr,
                           short resend)
{
  MESSAGE *msg = NULL;
  char file[_POSIX_PATH_MAX];
  BODY *b;
  FILE *bfp;
  int rv = -1;
  STATE s;
  int sec_type;

  memset (&s, 0, sizeof (s));

  if (!fp && (msg = mx_open_message (ctx, hdr->msgno)) == NULL)
    return (-1);

  if (!fp) fp = msg->fp;

  bfp = fp;

  /* parse the message header and MIME structure */

  fseeko (fp, hdr->offset, 0);
  newhdr->offset = hdr->offset;
  /* enable header weeding for resent messages */
  newhdr->env = mutt_read_rfc822_header (fp, newhdr, 1, resend);
  newhdr->content->length = hdr->content->length;
  mutt_parse_part (fp, newhdr->content);

  /* If resending a message, don't keep message_id or mail_followup_to.
   * Otherwise, we are resuming a postponed message, and want to keep those
   * headers if they exist.
   */
  if (resend)
  {
    FREE (&newhdr->env->message_id);
    FREE (&newhdr->env->mail_followup_to);
  }

  /* decrypt pgp/mime encoded messages */

  if ((WithCrypto & APPLICATION_PGP) &&
      (sec_type = mutt_is_multipart_encrypted (newhdr->content)))
  {
    newhdr->security |= sec_type;
    if (!crypt_valid_passphrase (sec_type))
      goto err;

    mutt_message _("Decrypting message...");
    if ((crypt_pgp_decrypt_mime (fp, &bfp, newhdr->content, &b) == -1)
	|| b == NULL)
    {
 err:
      mx_close_message (ctx, &msg);
      mutt_free_envelope (&newhdr->env);
      mutt_free_body (&newhdr->content);
      mutt_error _("Decryption failed.");
      return -1;
    }

    mutt_free_body (&newhdr->content);
    newhdr->content = b;

    mutt_clear_error ();
  }

  /*
   * remove a potential multipart/signed layer - useful when
   * resending messages
   */

  if (WithCrypto && mutt_is_multipart_signed (newhdr->content))
  {
    newhdr->security |= SIGN;
    if ((WithCrypto & APPLICATION_PGP)
        && ascii_strcasecmp (mutt_get_parameter ("protocol", newhdr->content->parameter), "application/pgp-signature") == 0)
      newhdr->security |= APPLICATION_PGP;
    else if ((WithCrypto & APPLICATION_SMIME))
      newhdr->security |= APPLICATION_SMIME;

    /* destroy the signature */
    mutt_free_body (&newhdr->content->parts->next);
    newhdr->content = mutt_remove_multipart (newhdr->content);
  }


  /*
   * We don't need no primary multipart.
   * Note: We _do_ preserve messages!
   *
   * XXX - we don't handle multipart/alternative in any
   * smart way when sending messages.  However, one may
   * consider this a feature.
   *
   */

  if (newhdr->content->type == TYPEMULTIPART)
    newhdr->content = mutt_remove_multipart (newhdr->content);

  s.fpin = bfp;

  /* create temporary files for all attachments */
  for (b = newhdr->content; b; b = b->next)
  {

    /* what follows is roughly a receive-mode variant of
     * mutt_get_tmp_attachment () from muttlib.c
     */

    file[0] = '\0';
    if (b->filename)
    {
      strfcpy (file, b->filename, sizeof (file));
      b->d_filename = safe_strdup (b->filename);
    }
    else
    {
      /* avoid Content-Disposition: header with temporary filename */
      b->use_disp = 0;
    }

    /* set up state flags */

    s.flags = 0;

    if (b->type == TYPETEXT)
    {
      if (!ascii_strcasecmp ("yes", mutt_get_parameter ("x-mutt-noconv", b->parameter)))
	b->noconv = 1;
      else
      {
	s.flags |= MUTT_CHARCONV;
	b->noconv = 0;
      }

      mutt_delete_parameter ("x-mutt-noconv", &b->parameter);
    }

    mutt_adv_mktemp (file, sizeof(file));
    if ((s.fpout = safe_fopen (file, "w")) == NULL)
      goto bail;


    if ((WithCrypto & APPLICATION_PGP) &&
	((sec_type = mutt_is_application_pgp (b)) & (ENCRYPT|SIGN)))
    {
      mutt_body_handler (b, &s);

      newhdr->security |= sec_type;

      b->type = TYPETEXT;
      mutt_str_replace (&b->subtype, "plain");
      mutt_delete_parameter ("x-action", &b->parameter);
    }
    else if ((WithCrypto & APPLICATION_SMIME) &&
             ((sec_type = mutt_is_application_smime (b)) & (ENCRYPT|SIGN)))
    {
      mutt_body_handler (b, &s);

      newhdr->security |= sec_type;
      b->type = TYPETEXT;
      mutt_str_replace (&b->subtype, "plain");
    }
    else
      mutt_decode_attachment (b, &s);

    if (safe_fclose (&s.fpout) != 0)
      goto bail;

    mutt_str_replace (&b->filename, file);
    b->unlink = 1;

    mutt_stamp_attachment (b);

    mutt_free_body (&b->parts);
    if (b->hdr) b->hdr->content = NULL; /* avoid dangling pointer */
  }

  /* Fix encryption flags. */

  /* No inline if multipart. */
  if (WithCrypto && (newhdr->security & INLINE) && newhdr->content->next)
    newhdr->security &= ~INLINE;

  /* Do we even support multiple mechanisms? */
  newhdr->security &= WithCrypto | ~(APPLICATION_PGP|APPLICATION_SMIME);

  /* Theoretically, both could be set. Take the one the user wants to set by default. */
  if ((newhdr->security & APPLICATION_PGP) && (newhdr->security & APPLICATION_SMIME))
  {
    if (option (OPTSMIMEISDEFAULT))
      newhdr->security &= ~APPLICATION_PGP;
    else
      newhdr->security &= ~APPLICATION_SMIME;
  }

  rv = 0;

  bail:

  /* that's it. */
  if (bfp != fp) safe_fclose (&bfp);
  if (msg) mx_close_message (ctx, &msg);

  if (rv == -1)
  {
    mutt_free_envelope (&newhdr->env);
    mutt_free_body (&newhdr->content);
  }

  return rv;
}