aboutsummaryrefslogtreecommitdiffstats
path: root/em-format/e-mail-formatter-secure-button.c
blob: 6cc34d00cc386e78d8263e88d29733122eb24a62 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
/*
 * evolution-secure-button.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 <glib/gi18n-lib.h>

#include <em-format/e-mail-formatter-extension.h>
#include <em-format/e-mail-formatter.h>
#include <e-util/e-util.h>

#if defined (HAVE_NSS) && defined (ENABLE_SMIME)
#include "certificate-viewer.h"
#include "e-cert-db.h"
#endif

#include <camel/camel.h>

typedef struct _EMailFormatterSecureButton {
    GObject parent;
} EMailFormatterSecureButton;

typedef struct _EMailFormatterSecureButtonClass {
    GObjectClass parent_class;
} EMailFormatterSecureButtonClass;

static void e_mail_formatter_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface);
static void e_mail_formatter_mail_extension_interface_init (EMailExtensionInterface *iface);

G_DEFINE_TYPE_EXTENDED (
    EMailFormatterSecureButton,
    e_mail_formatter_secure_button,
    G_TYPE_OBJECT,
    0,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_EXTENSION,
        e_mail_formatter_mail_extension_interface_init)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_FORMATTER_EXTENSION,
        e_mail_formatter_formatter_extension_interface_init));

static const gchar *formatter_mime_types[] = { "application/vnd.evolution.widget.secure-button", NULL };

static const struct {
    const gchar *icon, *shortdesc, *description;
} smime_sign_table[5] = {
    { "stock_signature-bad", N_("Unsigned"), N_("This message is not signed. There is no guarantee that this message is authentic.") },
    { "stock_signature-ok", N_("Valid signature"), N_("This message is signed and is valid meaning that it is very likely that this message is authentic.") },
    { "stock_signature-bad", N_("Invalid signature"), N_("The signature of this message cannot be verified, it may have been altered in transit.") },
    { "stock_signature", N_("Valid signature, but cannot verify sender"), N_("This message is signed with a valid signature, but the sender of the message cannot be verified.") },
    { "stock_signature-bad", N_("Signature exists, but need public key"), N_("This message is signed with a signature, but there is no corresponding public key.") },

};

static const struct {
    const gchar *icon, *shortdesc, *description;
} smime_encrypt_table[4] = {
    { "stock_lock-broken", N_("Unencrypted"), N_("This message is not encrypted. Its content may be viewed in transit across the Internet.") },
    { "stock_lock-ok", N_("Encrypted, weak"), N_("This message is encrypted, but with a weak encryption algorithm. It would be difficult, but not impossible for an outsider to view the content of this message in a practical amount of time.") },
    { "stock_lock-ok", N_("Encrypted"), N_("This message is encrypted.  It would be difficult for an outsider to view the content of this message.") },
    { "stock_lock-ok", N_("Encrypted, strong"), N_("This message is encrypted, with a strong encryption algorithm. It would be very difficult for an outsider to view the content of this message in a practical amount of time.") },
};

static const GdkRGBA smime_sign_colour[5] = {
    { 0 }, { 0.53, 0.73, 0.53, 1 }, { 0.73, 0.53, 0.53, 1 }, { 0.91, 0.82, 0.13, 1 }, { 0 },
};

static gboolean
emfe_secure_button_format (EMailFormatterExtension *extension,
                           EMailFormatter *formatter,
                           EMailFormatterContext *context,
                           EMailPart *part,
                           CamelStream *stream,
                           GCancellable *cancellable)
{
    gchar *str;

    if ((context->mode != E_MAIL_FORMATTER_MODE_NORMAL) &&
        (context->mode != E_MAIL_FORMATTER_MODE_RAW))
        return FALSE;

    str = g_strdup_printf (
        "<object type=\"application/vnd.evolution.widget.secure-button\" "
        "height=\"20\" width=\"100%%\" data=\"%s\" id=\"%s\"></object>",
        part->id, part->id);

    camel_stream_write_string (stream, str, cancellable, NULL);

    g_free (str);
    return TRUE;
}

#if defined (HAVE_NSS) && defined (ENABLE_SMIME)
static void
viewcert_clicked (GtkWidget *button,
                  GtkWidget *parent)
{
    CamelCipherCertInfo *info = g_object_get_data((GObject *) button, "e-cert-info");
    ECert *ec = NULL;

    if (info->cert_data)
        ec = e_cert_new (CERT_DupCertificate (info->cert_data));

    if (ec != NULL) {
        GtkWidget *w = certificate_viewer_show (ec);

        /* oddly enough certificate_viewer_show doesn't ... */
        gtk_widget_show (w);
        g_signal_connect (
            w, "response",
            G_CALLBACK (gtk_widget_destroy), NULL);

        if (w && parent)
            gtk_window_set_transient_for (
                (GtkWindow *) w, (GtkWindow *) parent);

        g_object_unref (ec);
    } else {
        g_warning("can't find certificate for %s <%s>",
            info->name ? info->name : "",
            info->email ? info->email : "");
    }
}
#endif

static void
info_response (GtkWidget *widget,
               guint button,
               gpointer user_data)
{
    gtk_widget_destroy (widget);
}

static void
add_cert_table (GtkWidget *grid,
                GQueue *certlist,
                gpointer user_data)
{
    GList *head, *link;
    GtkTable *table;
    gint n = 0;

    table = (GtkTable *) gtk_table_new (certlist->length, 2, FALSE);

    head = g_queue_peek_head_link (certlist);

    for (link = head; link != NULL; link = g_list_next (link)) {
        CamelCipherCertInfo *info = link->data;
        gchar *la = NULL;
        const gchar *l = NULL;

        if (info->name) {
            if (info->email && strcmp (info->name, info->email) != 0)
                l = la = g_strdup_printf("%s <%s>", info->name, info->email);
            else
                l = info->name;
        } else {
            if (info->email)
                l = info->email;
        }

        if (l) {
            GtkWidget *w;
#if defined (HAVE_NSS) && defined (ENABLE_SMIME)
            ECert *ec = NULL;
#endif
            w = gtk_label_new (l);
            gtk_misc_set_alignment ((GtkMisc *) w, 0.0, 0.5);
            g_free (la);
            gtk_table_attach (table, w, 0, 1, n, n + 1, GTK_FILL, GTK_FILL, 3, 3);
#if defined (HAVE_NSS) && defined (ENABLE_SMIME)
            w = gtk_button_new_with_mnemonic(_("_View Certificate"));
            gtk_table_attach (table, w, 1, 2, n, n + 1, 0, 0, 3, 3);
            g_object_set_data((GObject *)w, "e-cert-info", info);
            g_signal_connect (
                w, "clicked",
                G_CALLBACK (viewcert_clicked), grid);

            if (info->cert_data)
                ec = e_cert_new (CERT_DupCertificate (info->cert_data));

            if (ec == NULL)
                gtk_widget_set_sensitive (w, FALSE);
            else
                g_object_unref (ec);
#else
            w = gtk_label_new (_("This certificate is not viewable"));
            gtk_table_attach (table, w, 1, 2, n, n + 1, 0, 0, 3, 3);
#endif
            n++;
        }
    }

    gtk_container_add (GTK_CONTAINER (grid), GTK_WIDGET (table));
}

static void
format_cert_infos (GQueue *cert_infos,
                   GString *output_buffer)
{
    GQueue valid = G_QUEUE_INIT;
    GList *head, *link;

    head = g_queue_peek_head_link (cert_infos);

    /* Make sure we have a valid CamelCipherCertInfo before
     * appending anything to the output buffer, so we don't
     * end up with "()". */
    for (link = head; link != NULL; link = g_list_next (link)) {
        CamelCipherCertInfo *cinfo = link->data;

        if ((cinfo->name != NULL && *cinfo->name != '\0') ||
            (cinfo->email != NULL && *cinfo->email != '\0')) {
            g_queue_push_tail (&valid, cinfo);
        }
    }

    if (g_queue_is_empty (&valid))
        return;

    g_string_append (output_buffer, " (");

    while (!g_queue_is_empty (&valid)) {
        CamelCipherCertInfo *cinfo;

        cinfo = g_queue_pop_head (&valid);

        if (cinfo->name != NULL && *cinfo->name != '\0') {
            g_string_append (output_buffer, cinfo->name);

            if (cinfo->email != NULL && *cinfo->email != '\0') {
                g_string_append (output_buffer, " <");
                g_string_append (output_buffer, cinfo->email);
                g_string_append (output_buffer, ">");
            }

        } else if (cinfo->email != NULL && *cinfo->email != '\0') {
            g_string_append (output_buffer, cinfo->email);
        }

        if (!g_queue_is_empty (&valid))
            g_string_append (output_buffer, ", ");
    }

    g_string_append_c (output_buffer, ')');
}

static void
secure_button_clicked_cb (GtkWidget *widget,
                          EMailPart *part)
{
    GtkBuilder *builder;
    GtkWidget *grid, *w;
    GtkWidget *dialog;

    builder = gtk_builder_new ();
    e_load_ui_builder_definition (builder, "mail-dialogs.ui");

    dialog = e_builder_get_widget(builder, "message_security_dialog");

    grid = e_builder_get_widget(builder, "signature_grid");
    w = gtk_label_new (_(smime_sign_table[part->validity->sign.status].description));
    gtk_misc_set_alignment ((GtkMisc *) w, 0.0, 0.5);
    gtk_label_set_line_wrap ((GtkLabel *) w, TRUE);
    gtk_container_add (GTK_CONTAINER (grid), w);
    if (part->validity->sign.description) {
        GtkTextBuffer *buffer;

        buffer = gtk_text_buffer_new (NULL);
        gtk_text_buffer_set_text (
            buffer, part->validity->sign.description,
            strlen (part->validity->sign.description));
        w = g_object_new (gtk_scrolled_window_get_type (),
                 "hscrollbar_policy", GTK_POLICY_AUTOMATIC,
                 "vscrollbar_policy", GTK_POLICY_AUTOMATIC,
                 "shadow_type", GTK_SHADOW_IN,
                 "expand", TRUE,
                 "child", g_object_new(gtk_text_view_get_type(),
                               "buffer", buffer,
                               "cursor_visible", FALSE,
                               "editable", FALSE,
                               "width_request", 500,
                               "height_request", 160,
                               NULL),
                 NULL);
        g_object_unref (buffer);

        gtk_container_add (GTK_CONTAINER (grid), w);
    }

    if (!g_queue_is_empty (&part->validity->sign.signers))
        add_cert_table (
            grid, &part->validity->sign.signers, NULL);

    gtk_widget_show_all (grid);

    grid = e_builder_get_widget(builder, "encryption_grid");
    w = gtk_label_new (_(smime_encrypt_table[part->validity->encrypt.status].description));
    gtk_misc_set_alignment ((GtkMisc *) w, 0.0, 0.5);
    gtk_label_set_line_wrap ((GtkLabel *) w, TRUE);
    gtk_container_add (GTK_CONTAINER (grid), w);
    if (part->validity->encrypt.description) {
        GtkTextBuffer *buffer;

        buffer = gtk_text_buffer_new (NULL);
        gtk_text_buffer_set_text (
            buffer, part->validity->encrypt.description,
            strlen (part->validity->encrypt.description));
        w = g_object_new (gtk_scrolled_window_get_type (),
                 "hscrollbar_policy", GTK_POLICY_AUTOMATIC,
                 "vscrollbar_policy", GTK_POLICY_AUTOMATIC,
                 "shadow_type", GTK_SHADOW_IN,
                 "expand", TRUE,
                 "child", g_object_new(gtk_text_view_get_type(),
                               "buffer", buffer,
                               "cursor_visible", FALSE,
                               "editable", FALSE,
                               "width_request", 500,
                               "height_request", 160,
                               NULL),
                 NULL);
        g_object_unref (buffer);

        gtk_container_add (GTK_CONTAINER (grid), w);
    }

    if (!g_queue_is_empty (&part->validity->encrypt.encrypters))
        add_cert_table (grid, &part->validity->encrypt.encrypters, NULL);

    gtk_widget_show_all (grid);

    g_object_unref (builder);

    g_signal_connect (
        dialog, "response",
        G_CALLBACK (info_response), NULL);

    gtk_widget_show (dialog);
}

static GtkWidget *
emfe_secure_button_get_widget (EMailFormatterExtension *extension,
                               EMailPartList *context,
                               EMailPart *part,
                               GHashTable *params)
{
    GtkWidget *box, *button, *layout, *widget;
    const gchar *icon_name;
    gchar *description;
    GString *buffer;
    buffer = g_string_new ("");

    if (part->validity->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE) {
        const gchar *desc;
        gint status;

        status = part->validity->sign.status;
        desc = smime_sign_table[status].shortdesc;

        g_string_append (buffer, gettext (desc));

        format_cert_infos (&part->validity->sign.signers, buffer);
    }

    if (part->validity->encrypt.status != CAMEL_CIPHER_VALIDITY_ENCRYPT_NONE) {
        const gchar *desc;
        gint status;

        if (part->validity->sign.status != CAMEL_CIPHER_VALIDITY_SIGN_NONE)
            g_string_append (buffer, "\n");

        status = part->validity->encrypt.status;
        desc = smime_encrypt_table[status].shortdesc;
        g_string_append (buffer, gettext (desc));
    }

    description = g_string_free (buffer, FALSE);

    /* FIXME: need to have it based on encryption and signing too */
    if (part->validity->sign.status != 0)
        icon_name = smime_sign_table[part->validity->sign.status].icon;
    else
        icon_name = smime_encrypt_table[part->validity->encrypt.status].icon;

    box = gtk_event_box_new ();
    if (part->validity->sign.status != 0)
        gtk_widget_override_background_color (box, GTK_STATE_FLAG_NORMAL,
            &smime_sign_colour[part->validity->sign.status]);

    layout = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 5);
    gtk_container_add (GTK_CONTAINER (box), layout);

    button = gtk_button_new ();
    gtk_box_pack_start (GTK_BOX (layout), button, FALSE, FALSE, 0);
    g_signal_connect (button, "clicked",
        G_CALLBACK (secure_button_clicked_cb), part);

    widget = gtk_image_new_from_icon_name (
            icon_name, GTK_ICON_SIZE_LARGE_TOOLBAR);
    gtk_button_set_image (GTK_BUTTON (button), widget);

    widget = gtk_label_new (description);
    gtk_box_pack_start (GTK_BOX (layout), widget, FALSE, FALSE, 0);

    gtk_widget_show_all (box);

    g_free (description);
    return box;
}

static const gchar *
emfe_secure_button_get_display_name (EMailFormatterExtension *extension)
{
    return NULL;
}

static const gchar *
emfe_secure_button_get_description (EMailFormatterExtension *extension)
{
    return NULL;
}

static const gchar **
emfe_secure_button_mime_types (EMailExtension *extension)
{
    return formatter_mime_types;
}

static void
e_mail_formatter_secure_button_class_init (EMailFormatterSecureButtonClass *class)
{
}

static void
e_mail_formatter_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface)
{
    iface->format = emfe_secure_button_format;
    iface->get_widget = emfe_secure_button_get_widget;
    iface->get_display_name = emfe_secure_button_get_display_name;
    iface->get_description = emfe_secure_button_get_description;
}

static void
e_mail_formatter_mail_extension_interface_init (EMailExtensionInterface *iface)
{
    iface->mime_types = emfe_secure_button_mime_types;
}

static void
e_mail_formatter_secure_button_init (EMailFormatterSecureButton *extension)
{

}