static void collect_part(GMimeObject *part, PartCollectorData *fdata, gboolean multipart_parent) { GMimeContentType *content_type = g_mime_object_get_content_type(part); GMimeContentDisposition *disposition = g_mime_object_get_content_disposition(part); if (!content_type) return; GMimeDataWrapper *wrapper = g_mime_part_get_content_object(GMIME_PART(part)); if (!wrapper) return; // All the information will be collected in the CollectedPart CollectedPart *c_part = new_collected_part(fdata->part_id); gboolean is_attachment = FALSE; if (disposition) { c_part->disposition = g_ascii_strdown(disposition->disposition, -1); is_attachment = !g_ascii_strcasecmp(disposition->disposition, GMIME_DISPOSITION_ATTACHMENT); } // If a filename is given, collect it always const gchar *filename = g_mime_part_get_filename(GMIME_PART(part)); if (filename) c_part->filename = g_strdup(filename); // If a contentID is given, collect it always const char* content_id = g_mime_part_get_content_id (GMIME_PART(part)); if (content_id) c_part->content_id = g_strdup(content_id); // Get the contentType in lowercase gchar *content_type_str = g_mime_content_type_to_string(content_type); c_part->content_type = g_ascii_strdown(content_type_str, -1); g_free(content_type_str); // To qualify as a message body, a MIME entity MUST NOT have a Content-Disposition header with the value "attachment". if (!is_attachment && g_mime_content_type_is_type(content_type, "text", "*")) { gboolean is_text_plain = g_mime_content_type_is_type(content_type, "text", "plain"); gboolean is_text_html = g_mime_content_type_is_type(content_type, "text", "html"); gboolean is_text_rtf = g_mime_content_type_is_type(content_type, "text", "rtf"); gboolean is_text_enriched = g_mime_content_type_is_type(content_type, "text", "enriched"); gboolean is_new_text = !fdata->text_part && is_text_plain; gboolean is_new_html = !fdata->html_part && (is_text_html || is_text_enriched || is_text_rtf); GMimeStream *mem_stream = g_mime_stream_mem_new(); g_mime_stream_mem_set_owner(GMIME_STREAM_MEM(mem_stream), FALSE); GMimeStream *filtered_mem_stream = g_mime_stream_filter_new(mem_stream); const gchar *charset = g_mime_object_get_content_type_parameter(part, "charset"); if (charset && g_ascii_strcasecmp(charset, UTF8_CHARSET)) { GMimeFilter *utf8_charset_filter = g_mime_filter_charset_new(charset, UTF8_CHARSET); g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered_mem_stream), utf8_charset_filter); g_object_unref(utf8_charset_filter); } if (!fdata->raw && is_new_text) { GMimeFilter *strip_filter = g_mime_filter_strip_new(); g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered_mem_stream), strip_filter); g_object_unref(strip_filter); GMimeFilter *crlf_filter = g_mime_filter_crlf_new(FALSE, FALSE); g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered_mem_stream), crlf_filter); g_object_unref(crlf_filter); GMimeFilter *html_filter = g_mime_filter_html_new( GMIME_FILTER_HTML_CONVERT_NL | GMIME_FILTER_HTML_CONVERT_SPACES | GMIME_FILTER_HTML_CONVERT_URLS | GMIME_FILTER_HTML_MARK_CITATION | GMIME_FILTER_HTML_CONVERT_ADDRESSES | GMIME_FILTER_HTML_CITE, CITATION_COLOUR); g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered_mem_stream), html_filter); g_object_unref(html_filter); } if (!fdata->raw && (is_new_text || is_new_html)) { GMimeFilter *from_filter = g_mime_filter_from_new(GMIME_FILTER_FROM_MODE_ESCAPE); g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered_mem_stream), from_filter); g_object_unref(from_filter); } // Add Enriched/RTF filter for this content if (!fdata->raw && (is_new_html && (is_text_enriched || is_text_rtf))) { guint flags = 0; if (is_text_rtf) flags = GMIME_FILTER_ENRICHED_IS_RICHTEXT; GMimeFilter *enriched_filter = g_mime_filter_enriched_new(flags); g_mime_stream_filter_add(GMIME_STREAM_FILTER(filtered_mem_stream), enriched_filter); g_object_unref(enriched_filter); } g_mime_data_wrapper_write_to_stream(wrapper, filtered_mem_stream); // Very important! Flush the the stream and get all content through. g_mime_stream_flush(filtered_mem_stream); // Freed by the mem_stream on its own (owner) [transfer none] c_part->content = g_mime_stream_mem_get_byte_array(GMIME_STREAM_MEM(mem_stream)); // After we unref the mem_stream, part_content is NOT available anymore g_object_unref(filtered_mem_stream); g_object_unref(mem_stream); // Without content, the collected body part is of no use, so we ignore it. if (c_part->content->len == 0) { free_collected_part(c_part); return; } // We accept only the first text and first html content, everything // else is considered an alternative body if (is_new_text) { fdata->text_part = c_part; } else if (is_new_html) { fdata->html_part = c_part; } else { g_ptr_array_add(fdata->alternative_bodies, c_part); } } else { GMimeStream *attachment_mem_stream = g_mime_stream_mem_new(); g_mime_stream_mem_set_owner (GMIME_STREAM_MEM(attachment_mem_stream), FALSE); g_mime_data_wrapper_write_to_stream(wrapper, attachment_mem_stream); g_mime_stream_flush(attachment_mem_stream); c_part->content = g_mime_stream_mem_get_byte_array(GMIME_STREAM_MEM(attachment_mem_stream)); g_object_unref(attachment_mem_stream); // Some content may not have disposition defined so we need to determine better what it is if ((disposition && !g_ascii_strcasecmp(disposition->disposition, GMIME_DISPOSITION_INLINE)) || g_mime_part_get_content_id(GMIME_PART(part))) { g_ptr_array_add(fdata->inlines, c_part); } else { // All other disposition should be kept within attachments g_ptr_array_add(fdata->attachments, c_part); } } }
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; }