diff options
Diffstat (limited to 'em-format/e-mail-parser-inlinepgp-signed.c')
| -rw-r--r-- | em-format/e-mail-parser-inlinepgp-signed.c | 230 |
1 files changed, 230 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..d90dcddd2e --- /dev/null +++ b/em-format/e-mail-parser-inlinepgp-signed.c @@ -0,0 +1,230 @@ +/* + * 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 "e-mail-format-extensions.h" + +#include <em-format/e-mail-parser-extension.h> +#include <em-format/e-mail-parser.h> +#include <em-format/e-mail-part-utils.h> +#include <e-util/e-util.h> + +#include <glib/gi18n-lib.h> +#include <camel/camel.h> + +#include <string.h> + +typedef struct _EMailParserInlinePGPSigned { + GObject parent; +} EMailParserInlinePGPSigned; + +typedef struct _EMailParserInlinePGPSignedClass { + GObjectClass parent_class; +} EMailParserInlinePGPSignedClass; + +static void e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface); +static void e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface); + +G_DEFINE_TYPE_EXTENDED ( + EMailParserInlinePGPSigned, + e_mail_parser_inline_pgp_signed, + G_TYPE_OBJECT, + 0, + G_IMPLEMENT_INTERFACE ( + E_TYPE_MAIL_EXTENSION, + e_mail_parser_mail_extension_interface_init) + G_IMPLEMENT_INTERFACE ( + E_TYPE_MAIL_PARSER_EXTENSION, + e_mail_parser_parser_extension_interface_init)); + +static const gchar* parser_mime_types[] = { "application/x-inlinepgp-signed", + NULL }; + +static GSList * +empe_inlinepgp_signed_parse (EMailParserExtension *extension, + EMailParser *parser, + CamelMimePart *part, + GString *part_id, + GCancellable *cancellable) +{ + CamelStream *filtered_stream; + CamelMimeFilterPgp *pgp_filter; + CamelContentType *content_type; + CamelCipherContext *cipher; + CamelCipherValidity *valid; + CamelDataWrapper *dw; + CamelMimePart *opart; + CamelStream *ostream; + gchar *type; + gint len; + GError *local_error = NULL; + GByteArray *ba; + GSList *parts, *iter; + + if (g_cancellable_is_cancelled (cancellable)) + return NULL; + + 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 (!valid) { + parts = e_mail_parser_error ( + parser, cancellable, + _("Error verifying signature: %s"), + local_error->message ? + local_error->message : + _("Unknown error")); + + g_clear_error (&local_error); + + parts = g_slist_concat (parts, + e_mail_parser_parse_part_as ( + parser, part, part_id, + "application/vnd.evolution.source", + cancellable)); + + g_object_unref (cipher); + return parts; + } + + /* 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"); + + parts = e_mail_parser_parse_part ( + parser, opart, part_id, cancellable); + + for (iter = parts; iter; iter = iter->next) { + EMailPart *mail_part; + + mail_part = iter->data; + if (!mail_part) + continue; + + e_mail_part_update_validity (mail_part, valid, + E_MAIL_PART_VALIDITY_SIGNED | + E_MAIL_PART_VALIDITY_PGP); + } + + 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)) { + GSList *button; + EMailPart *mail_part; + g_string_append (part_id, ".inlinepgp_signed.button"); + + button = e_mail_parser_parse_part_as ( + parser, part, part_id, + "application/vnd.evolution.widget.secure-button", + cancellable); + if (button && button->data) { + mail_part = button->data; + + e_mail_part_update_validity (mail_part, valid, + E_MAIL_PART_VALIDITY_SIGNED | + E_MAIL_PART_VALIDITY_PGP); + } + + parts = g_slist_concat (parts, button); + + g_string_truncate (part_id, len); + } + + /* Clean Up */ + camel_cipher_validity_free (valid); + g_object_unref (dw); + g_object_unref (opart); + g_object_unref (ostream); + g_object_unref (cipher); + + return parts; +} + +static const gchar ** +empe_inlinepgp_signed_mime_types (EMailExtension *extension) +{ + return parser_mime_types; +} + +static void +e_mail_parser_inline_pgp_signed_class_init (EMailParserInlinePGPSignedClass *klass) +{ + e_mail_parser_inline_pgp_signed_parent_class = g_type_class_peek_parent (klass); +} + +static void +e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface) +{ + iface->parse = empe_inlinepgp_signed_parse; +} + +static void +e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface) +{ + iface->mime_types = empe_inlinepgp_signed_mime_types; +} + +static void +e_mail_parser_inline_pgp_signed_init (EMailParserInlinePGPSigned *parser) +{ + +} |