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/* notmuch - Not much of an email program, (just index and search)
*
* Copyright © 2009 Carl Worth
* Copyright © 2009 Keith Packard
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Authors: Carl Worth <cworth@cworth.org>
* Keith Packard <keithp@keithp.com>
*/
#include "notmuch-client.h"
typedef struct show_message_state {
int part_count;
int in_zone;
} show_message_state_t;
static void
show_message_part (GMimeObject *part,
show_message_state_t *state,
const notmuch_show_format_t *format,
notmuch_show_params_t *params,
int first)
{
GMimeObject *decryptedpart = NULL;
int selected;
state->part_count += 1;
if (! (GMIME_IS_PART (part) || GMIME_IS_MULTIPART (part) || GMIME_IS_MESSAGE_PART (part))) {
fprintf (stderr, "Warning: Not displaying unknown mime part: %s.\n",
g_type_name (G_OBJECT_TYPE (part)));
return;
}
selected = (params->part <= 0 || state->part_count == params->part);
if (selected || state->in_zone) {
if (!first && (params->part <= 0 || state->in_zone))
fputs (format->part_sep, stdout);
if (format->part_start)
format->part_start (part, &(state->part_count));
}
/* handle PGP/MIME parts */
if (GMIME_IS_MULTIPART (part) && params->cryptoctx) {
GMimeMultipart *multipart = GMIME_MULTIPART (part);
GError* err = NULL;
if (GMIME_IS_MULTIPART_ENCRYPTED (part) && params->decrypt)
{
if ( g_mime_multipart_get_count (multipart) != 2 ) {
/* this violates RFC 3156 section 4, so we won't bother with it. */
fprintf (stderr,
"Error: %d part(s) for a multipart/encrypted message (should be exactly 2)\n",
g_mime_multipart_get_count (multipart));
} else {
GMimeMultipartEncrypted *encrypteddata = GMIME_MULTIPART_ENCRYPTED (part);
decryptedpart = g_mime_multipart_encrypted_decrypt (encrypteddata, params->cryptoctx, &err);
if (decryptedpart) {
if ((selected || state->in_zone) && format->part_encstatus)
format->part_encstatus (1);
const GMimeSignatureValidity *sigvalidity = g_mime_multipart_encrypted_get_signature_validity (encrypteddata);
if (!sigvalidity)
fprintf (stderr, "Failed to verify signed part: %s\n", (err ? err->message : "no error explanation given"));
if ((selected || state->in_zone) && format->part_sigstatus)
format->part_sigstatus (sigvalidity);
} else {
fprintf (stderr, "Failed to decrypt part: %s\n", (err ? err->message : "no error explanation given"));
if ((selected || state->in_zone) && format->part_encstatus)
format->part_encstatus (0);
}
}
}
else if (GMIME_IS_MULTIPART_SIGNED (part))
{
if ( g_mime_multipart_get_count (multipart) != 2 ) {
/* this violates RFC 3156 section 5, so we won't bother with it. */
fprintf (stderr,
"Error: %d part(s) for a multipart/signed message (should be exactly 2)\n",
g_mime_multipart_get_count (multipart));
} else {
/* For some reason the GMimeSignatureValidity returned
* here is not a const (inconsistent with that
* returned by
* g_mime_multipart_encrypted_get_signature_validity,
* and therefore needs to be properly disposed of.
* Hopefully the API will become more consistent. */
GMimeSignatureValidity *sigvalidity = g_mime_multipart_signed_verify (GMIME_MULTIPART_SIGNED (part), params->cryptoctx, &err);
if (!sigvalidity) {
fprintf (stderr, "Failed to verify signed part: %s\n", (err ? err->message : "no error explanation given"));
}
if ((selected || state->in_zone) && format->part_sigstatus)
format->part_sigstatus (sigvalidity);
if (sigvalidity)
g_mime_signature_validity_free (sigvalidity);
}
}
if (err)
g_error_free (err);
}
/* end handle PGP/MIME parts */
if (selected || state->in_zone)
format->part_content (part);
if (GMIME_IS_MULTIPART (part)) {
GMimeMultipart *multipart = GMIME_MULTIPART (part);
int i;
if (selected)
state->in_zone = 1;
if (decryptedpart) {
/* We emit the useless application/pgp-encrypted version
* part here only to keep the emitted output as consistent
* as possible between decrypted output and the
* unprocessed multipart/mime. For some strange reason,
* the actual encrypted data is the second part of the
* multipart. */
show_message_part (g_mime_multipart_get_part (multipart, 0), state, format, params, TRUE);
show_message_part (decryptedpart, state, format, params, FALSE);
} else {
for (i = 0; i < g_mime_multipart_get_count (multipart); i++) {
show_message_part (g_mime_multipart_get_part (multipart, i),
state, format, params, i == 0);
}
}
if (selected)
state->in_zone = 0;
} else if (GMIME_IS_MESSAGE_PART (part)) {
GMimeMessage *mime_message = g_mime_message_part_get_message (GMIME_MESSAGE_PART (part));
if (selected)
state->in_zone = 1;
if (selected || (!selected && state->in_zone)) {
fputs (format->header_start, stdout);
if (format->header_message_part)
format->header_message_part (mime_message);
fputs (format->header_end, stdout);
fputs (format->body_start, stdout);
}
show_message_part (g_mime_message_get_mime_part (mime_message),
state, format, params, TRUE);
if (selected || (!selected && state->in_zone))
fputs (format->body_end, stdout);
if (selected)
state->in_zone = 0;
}
if (selected || state->in_zone) {
if (format->part_end)
format->part_end (part);
}
}
notmuch_status_t
show_message_body (const char *filename,
const notmuch_show_format_t *format,
notmuch_show_params_t *params)
{
GMimeStream *stream = NULL;
GMimeParser *parser = NULL;
GMimeMessage *mime_message = NULL;
notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
FILE *file = NULL;
show_message_state_t state;
state.part_count = 0;
state.in_zone = 0;
file = fopen (filename, "r");
if (! file) {
fprintf (stderr, "Error opening %s: %s\n", filename, strerror (errno));
ret = NOTMUCH_STATUS_FILE_ERROR;
goto DONE;
}
stream = g_mime_stream_file_new (file);
g_mime_stream_file_set_owner (GMIME_STREAM_FILE (stream), FALSE);
parser = g_mime_parser_new_with_stream (stream);
mime_message = g_mime_parser_construct_message (parser);
show_message_part (g_mime_message_get_mime_part (mime_message),
&state,
format,
params,
TRUE);
DONE:
if (mime_message)
g_object_unref (mime_message);
if (parser)
g_object_unref (parser);
if (stream)
g_object_unref (stream);
if (file)
fclose (file);
return ret;
}
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