static void interpret_att(GSList** stack, gchar** args)
{
GMimePart* pt = g_mime_part_new_with_type(args[1], args[2]);
g_mime_part_set_filename(pt, args[0]);
g_mime_part_set_content_encoding(pt, GMIME_CONTENT_ENCODING_BASE64);
g_mime_object_set_content_id(GMIME_OBJECT(pt), args[0]);
add_content(GMIME_CONTENT_ENCODING_BASE64, args[0], pt);
add_part(stack, GMIME_OBJECT(pt));
}
gboolean
g_mime_gpgme_mps_sign(GMimeMultipartSigned * mps, GMimeObject * content,
const gchar * userid, gpgme_protocol_t protocol,
GtkWindow * parent, GError ** err)
{
GMimeStream *stream;
GMimeStream *filtered;
GMimeStream *sigstream;
GMimeFilter *filter;
GMimeContentType *content_type;
GMimeDataWrapper *wrapper;
GMimeParser *parser;
GMimePart *signature;
gchar *micalg;
const gchar *proto_type;
const gchar *sig_subtype;
gpgme_hash_algo_t hash_algo;
g_return_val_if_fail(GMIME_IS_MULTIPART_SIGNED(mps), FALSE);
g_return_val_if_fail(GMIME_IS_OBJECT(content), FALSE);
/* Prepare all the parts for signing... */
sign_prepare(content);
/* get the cleartext */
stream = g_mime_stream_mem_new();
filtered = g_mime_stream_filter_new(stream);
/* Note: see rfc3156, section 3 - second note */
filter = g_mime_filter_from_new(GMIME_FILTER_FROM_MODE_ARMOR);
g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered), filter);
g_object_unref(filter);
/* Note: see rfc3156, section 5.4 (this is the main difference between rfc2015 and rfc3156) */
filter = g_mime_filter_strip_new();
g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered), filter);
g_object_unref(filter);
g_mime_object_write_to_stream(content, filtered);
g_mime_stream_flush(filtered);
g_object_unref(filtered);
g_mime_stream_reset(stream);
/* Note: see rfc2015 or rfc3156, section 5.1 */
filtered = g_mime_stream_filter_new(stream);
filter = g_mime_filter_crlf_new(TRUE, FALSE);
g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered), filter);
g_object_unref(filter);
/* construct the signature stream */
sigstream = g_mime_stream_mem_new();
/* sign the content stream */
hash_algo =
libbalsa_gpgme_sign(userid, filtered, sigstream, protocol, FALSE,
parent, err);
g_object_unref(filtered);
if (hash_algo == GPGME_MD_NONE) {
g_object_unref(sigstream);
g_object_unref(stream);
return FALSE;
}
g_mime_stream_reset(sigstream);
g_mime_stream_reset(stream);
/* set the multipart/signed protocol and micalg */
content_type = g_mime_object_get_content_type(GMIME_OBJECT(mps));
if (protocol == GPGME_PROTOCOL_OpenPGP) {
micalg =
g_strdup_printf("PGP-%s", gpgme_hash_algo_name(hash_algo));
proto_type = "application/pgp-signature";
sig_subtype = "pgp-signature";
} else {
micalg = g_strdup(gpgme_hash_algo_name(hash_algo));
proto_type = "application/pkcs7-signature";
sig_subtype = "pkcs7-signature";
}
g_mime_content_type_set_parameter(content_type, "micalg", micalg);
g_free(micalg);
g_mime_content_type_set_parameter(content_type, "protocol", proto_type);
g_mime_multipart_set_boundary(GMIME_MULTIPART(mps), NULL);
/* construct the content part */
parser = g_mime_parser_new_with_stream(stream);
content = g_mime_parser_construct_part(parser);
g_object_unref(stream);
g_object_unref(parser);
/* construct the signature part */
signature = g_mime_part_new_with_type("application", sig_subtype);
wrapper = g_mime_data_wrapper_new();
g_mime_data_wrapper_set_stream(wrapper, sigstream);
g_mime_part_set_content_object(signature, wrapper);
g_object_unref(sigstream);
g_object_unref(wrapper);
/* FIXME: temporary hack, this info should probably be set in
* the CipherContext class - maybe ::sign can take/output a
* GMimePart instead. */
if (protocol == GPGME_PROTOCOL_CMS) {
g_mime_part_set_content_encoding(signature,
GMIME_CONTENT_ENCODING_BASE64);
g_mime_part_set_filename(signature, "smime.p7m");
}
/* save the content and signature parts */
/* FIXME: make sure there aren't any other parts?? */
g_mime_multipart_add(GMIME_MULTIPART(mps), content);
g_mime_multipart_add(GMIME_MULTIPART(mps), (GMimeObject *) signature);
g_object_unref(signature);
g_object_unref(content);
return TRUE;
}
