diff options
Diffstat (limited to 'em-format/e-mail-parser-inlinepgp-signed.c')
| -rw-r--r-- | em-format/e-mail-parser-inlinepgp-signed.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/em-format/e-mail-parser-inlinepgp-signed.c b/em-format/e-mail-parser-inlinepgp-signed.c new file mode 100644 index 0000000000..37cf5a2dcf --- /dev/null +++ b/em-format/e-mail-parser-inlinepgp-signed.c @@ -0,0 +1,201 @@ +/* + * e-mail-parser-inlinepgp-signed.c + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) version 3. + * + * 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with the program; if not, see <http://www.gnu.org/licenses/> + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <string.h> +#include <glib/gi18n-lib.h> + +#include <e-util/e-util.h> + +#include "e-mail-parser-extension.h" +#include "e-mail-part-utils.h" + +typedef EMailParserExtension EMailParserInlinePGPSigned; +typedef EMailParserExtensionClass EMailParserInlinePGPSignedClass; + +GType e_mail_parser_inline_pgp_signed_get_type (void); + +G_DEFINE_TYPE ( + EMailParserInlinePGPSigned, + e_mail_parser_inline_pgp_signed, + E_TYPE_MAIL_PARSER_EXTENSION) + +static const gchar *parser_mime_types[] = { + "application/x-inlinepgp-signed", + NULL +}; + +static gboolean +empe_inlinepgp_signed_parse (EMailParserExtension *extension, + EMailParser *parser, + CamelMimePart *part, + GString *part_id, + GCancellable *cancellable, + GQueue *out_mail_parts) +{ + CamelStream *filtered_stream; + CamelMimeFilterPgp *pgp_filter; + CamelContentType *content_type; + CamelCipherContext *cipher; + CamelCipherValidity *valid; + CamelDataWrapper *dw; + CamelMimePart *opart; + CamelStream *ostream; + GQueue work_queue = G_QUEUE_INIT; + GList *head, *link; + gchar *type; + gint len; + GError *local_error = NULL; + GByteArray *ba; + + if (g_cancellable_is_cancelled (cancellable) || + /* avoid recursion */ + (part_id->str && part_id->len > 17 && g_str_has_suffix (part_id->str, ".inlinepgp_signed"))) + return FALSE; + + cipher = camel_gpg_context_new (e_mail_parser_get_session (parser)); + + /* Verify the signature of the message */ + valid = camel_cipher_context_verify_sync ( + cipher, part, cancellable, &local_error); + + if (local_error != NULL) { + e_mail_parser_error ( + parser, out_mail_parts, + _("Error verifying signature: %s"), + local_error->message); + + g_error_free (local_error); + + e_mail_parser_parse_part_as ( + parser, part, part_id, + "application/vnd.evolution.source", + cancellable, out_mail_parts); + + g_object_unref (cipher); + + return TRUE; + } + + /* Setup output stream */ + ostream = camel_stream_mem_new (); + filtered_stream = camel_stream_filter_new (ostream); + + /* Add PGP header / footer filter */ + pgp_filter = (CamelMimeFilterPgp *) camel_mime_filter_pgp_new (); + camel_stream_filter_add ( + CAMEL_STREAM_FILTER (filtered_stream), + CAMEL_MIME_FILTER (pgp_filter)); + g_object_unref (pgp_filter); + + /* Pass through the filters that have been setup */ + dw = camel_medium_get_content ((CamelMedium *) part); + camel_data_wrapper_decode_to_stream_sync ( + dw, (CamelStream *) filtered_stream, cancellable, NULL); + camel_stream_flush ((CamelStream *) filtered_stream, cancellable, NULL); + g_object_unref (filtered_stream); + + /* Create a new text/plain MIME part containing the signed + * content preserving the original part's Content-Type params. */ + content_type = camel_mime_part_get_content_type (part); + type = camel_content_type_format (content_type); + content_type = camel_content_type_decode (type); + g_free (type); + + g_free (content_type->type); + content_type->type = g_strdup ("text"); + g_free (content_type->subtype); + content_type->subtype = g_strdup ("plain"); + type = camel_content_type_format (content_type); + camel_content_type_unref (content_type); + + ba = camel_stream_mem_get_byte_array ((CamelStreamMem *) ostream); + opart = camel_mime_part_new (); + camel_mime_part_set_content (opart, (gchar *) ba->data, ba->len, type); + g_free (type); + + len = part_id->len; + g_string_append (part_id, ".inlinepgp_signed"); + + e_mail_parser_parse_part ( + parser, opart, part_id, cancellable, &work_queue); + + head = g_queue_peek_head_link (&work_queue); + + for (link = head; link != NULL; link = g_list_next (link)) { + EMailPart *mail_part = link->data; + + e_mail_part_update_validity ( + mail_part, valid, + E_MAIL_PART_VALIDITY_SIGNED | + E_MAIL_PART_VALIDITY_PGP); + } + + e_queue_transfer (&work_queue, out_mail_parts); + + g_string_truncate (part_id, len); + + /* Add a widget with details about the encryption, but only when + * the encrypted isn't itself secured, in that case it has created + * the button itself */ + if (!e_mail_part_is_secured (opart)) { + EMailPart *mail_part; + + g_string_append (part_id, ".inlinepgp_signed.button"); + + e_mail_parser_parse_part_as ( + parser, part, part_id, + "application/vnd.evolution.widget.secure-button", + cancellable, &work_queue); + + mail_part = g_queue_peek_head (&work_queue); + if (mail_part != NULL) + e_mail_part_update_validity ( + mail_part, valid, + E_MAIL_PART_VALIDITY_SIGNED | + E_MAIL_PART_VALIDITY_PGP); + + e_queue_transfer (&work_queue, out_mail_parts); + + g_string_truncate (part_id, len); + } + + /* Clean Up */ + camel_cipher_validity_free (valid); + g_object_unref (opart); + g_object_unref (ostream); + g_object_unref (cipher); + + return TRUE; +} + +static void +e_mail_parser_inline_pgp_signed_class_init (EMailParserExtensionClass *class) +{ + class->mime_types = parser_mime_types; + class->priority = G_PRIORITY_LOW; + class->parse = empe_inlinepgp_signed_parse; +} + +static void +e_mail_parser_inline_pgp_signed_init (EMailParserExtension *extension) +{ +} |