pidgin/pidgin

certificate: Use SHA256 fingerprints instead of SHA1
release-2.x.y
2017-03-06, dx
b3d0ba7c75f6
certificate: Use SHA256 fingerprints instead of SHA1

This meant adding a get_fingerprint_sha256 function to the certificate scheme
structs, which meant adding a struct_size member because we ran out of reserved
members there.

The API-facing purple_certificate_get_fingerprint_sha256() has a fallback
parameter to use sha1 if the SSL plugin doesn't implement this function
(probably an outdated installation, or a third party SSL plugin). When using
the function for display purposes, the fallback is disabled and it returns
NULL, but when using it to compare certificates it's better to have at least
the SHA1.

In functions like purple_certificate_display_x509(), some slight changes to
translatable strings would have been required. Since we're in a string freeze
right now, I avoided those by concatenating a language-neutral "SHA256: %s" at
the end of those messages. The SHA1 line used the word "fingerprint" but we
can't reuse that translation. This should be cleaned up after the release.
/**
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include "config.h"
#include "gntinternal.h"
#undef GNT_LOG_DOMAIN
#define GNT_LOG_DOMAIN "Utils"
#include "gntbutton.h"
#include "gntcheckbox.h"
#include "gntcombobox.h"
#include "gntentry.h"
#include "gntlabel.h"
#include "gntline.h"
#include "gnttextview.h"
#include "gnttree.h"
#include "gntutils.h"
#include "gntwindow.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifndef NO_LIBXML
#include <libxml/parser.h>
#include <libxml/tree.h>
#endif
void gnt_util_get_text_bound(const char *text, int *width, int *height)
{
const char *s = text, *last;
int count = 1, max = 0;
int len;
/* XXX: ew ... everyone look away */
last = s;
if (s)
{
while (*s)
{
if (*s == '\n' || *s == '\r')
{
count++;
len = gnt_util_onscreen_width(last, s);
if (max < len)
max = len;
last = s + 1;
}
s = g_utf8_next_char(s);
}
len = gnt_util_onscreen_width(last, s);
if (max < len)
max = len;
}
if (height)
*height = count;
if (width)
*width = max + (count > 1);
}
int gnt_util_onscreen_width(const char *start, const char *end)
{
int width = 0;
if (end == NULL)
end = start + strlen(start);
while (start < end) {
width += g_unichar_iswide(g_utf8_get_char(start)) ? 2 : 1;
start = g_utf8_next_char(start);
}
return width;
}
const char *gnt_util_onscreen_width_to_pointer(const char *string, int len, int *w)
{
int size;
int width = 0;
const char *str = string;
if (len <= 0) {
len = gnt_util_onscreen_width(string, NULL);
}
while (width < len && *str) {
size = g_unichar_iswide(g_utf8_get_char(str)) ? 2 : 1;
if (width + size > len)
break;
str = g_utf8_next_char(str);
width += size;
}
if (w)
*w = width;
return str;
}
char *gnt_util_onscreen_fit_string(const char *string, int maxw)
{
const char *start, *end;
GString *str;
if (maxw <= 0)
maxw = getmaxx(stdscr) - 4;
start = string;
str = g_string_new(NULL);
while (*start) {
if ((end = strchr(start, '\n')) != NULL ||
(end = strchr(start, '\r')) != NULL) {
if (gnt_util_onscreen_width(start, end) > maxw)
end = NULL;
}
if (end == NULL)
end = gnt_util_onscreen_width_to_pointer(start, maxw, NULL);
str = g_string_append_len(str, start, end - start);
if (*end) {
str = g_string_append_c(str, '\n');
if (*end == '\n' || *end == '\r')
end++;
}
start = end;
}
return g_string_free(str, FALSE);
}
struct duplicate_fns
{
GDupFunc key_dup;
GDupFunc value_dup;
GHashTable *table;
};
static void
duplicate_values(gpointer key, gpointer value, gpointer data)
{
struct duplicate_fns *fns = data;
g_hash_table_insert(fns->table, fns->key_dup ? fns->key_dup(key) : key,
fns->value_dup ? fns->value_dup(value) : value);
}
GHashTable *g_hash_table_duplicate(GHashTable *src, GHashFunc hash,
GEqualFunc equal, GDestroyNotify key_d, GDestroyNotify value_d,
GDupFunc key_dup, GDupFunc value_dup)
{
GHashTable *dest = g_hash_table_new_full(hash, equal, key_d, value_d);
struct duplicate_fns fns = {key_dup, value_dup, dest};
g_hash_table_foreach(src, duplicate_values, &fns);
return dest;
}
gboolean gnt_boolean_handled_accumulator(GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy)
{
gboolean continue_emission;
gboolean signal_handled;
signal_handled = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, signal_handled);
continue_emission = !signal_handled;
return continue_emission;
}
typedef struct {
GHashTable *hash;
GntTree *tree;
} BindingView;
static void
add_binding(gpointer key, gpointer value, gpointer data)
{
BindingView *bv = data;
GntBindableActionParam *act = value;
const char *name = g_hash_table_lookup(bv->hash, act->action);
if (name && *name) {
const char *k = gnt_key_lookup(key);
if (!k)
k = key;
gnt_tree_add_row_after(bv->tree, (gpointer)k,
gnt_tree_create_row(bv->tree, k, name), NULL, NULL);
}
}
static void
add_action(gpointer key, gpointer value, gpointer data)
{
BindingView *bv = data;
g_hash_table_insert(bv->hash, value, key);
}
GntWidget *gnt_widget_bindings_view(GntWidget *widget)
{
GntBindable *bind = GNT_BINDABLE(widget);
GntWidget *tree = gnt_tree_new_with_columns(2);
GntBindableClass *klass = GNT_BINDABLE_CLASS(GNT_BINDABLE_GET_CLASS(bind));
GHashTable *hash = g_hash_table_new(g_direct_hash, g_direct_equal);
BindingView bv = {hash, GNT_TREE(tree)};
gnt_tree_set_compare_func(bv.tree, (GCompareFunc)g_utf8_collate);
g_hash_table_foreach(klass->actions, add_action, &bv);
g_hash_table_foreach(klass->bindings, add_binding, &bv);
if (GNT_TREE(tree)->list == NULL) {
gnt_widget_destroy(tree);
tree = NULL;
} else
gnt_tree_adjust_columns(bv.tree);
g_hash_table_destroy(hash);
return tree;
}
#ifndef NO_LIBXML
static GntWidget *
gnt_widget_from_xmlnode(xmlNode *node, GntWidget **data[], int max)
{
GntWidget *widget = NULL;
char *name;
char *id, *prop, *content;
int val;
if (node == NULL || node->name == NULL || node->type != XML_ELEMENT_NODE)
return NULL;
name = (char*)node->name;
content = (char*)xmlNodeGetContent(node);
if (strcmp(name + 1, "window") == 0 || strcmp(name + 1, "box") == 0) {
xmlNode *ch;
char *title;
gboolean vert = (*name == 'v');
if (name[1] == 'w')
widget = gnt_window_box_new(FALSE, vert);
else
widget = gnt_box_new(FALSE, vert);
title = (char*)xmlGetProp(node, (xmlChar*)"title");
if (title) {
gnt_box_set_title(GNT_BOX(widget), title);
xmlFree(title);
}
prop = (char*)xmlGetProp(node, (xmlChar*)"fill");
if (prop) {
if (sscanf(prop, "%d", &val) == 1)
gnt_box_set_fill(GNT_BOX(widget), !!val);
xmlFree(prop);
}
prop = (char*)xmlGetProp(node, (xmlChar*)"align");
if (prop) {
if (sscanf(prop, "%d", &val) == 1)
gnt_box_set_alignment(GNT_BOX(widget), val);
xmlFree(prop);
}
prop = (char*)xmlGetProp(node, (xmlChar*)"pad");
if (prop) {
if (sscanf(prop, "%d", &val) == 1)
gnt_box_set_pad(GNT_BOX(widget), val);
xmlFree(prop);
}
for (ch = node->children; ch; ch=ch->next)
gnt_box_add_widget(GNT_BOX(widget), gnt_widget_from_xmlnode(ch, data, max));
} else if (strcmp(name, "button") == 0) {
widget = gnt_button_new(content);
} else if (strcmp(name, "label") == 0) {
widget = gnt_label_new(content);
} else if (strcmp(name, "entry") == 0) {
widget = gnt_entry_new(content);
} else if (strcmp(name, "combobox") == 0) {
widget = gnt_combo_box_new();
} else if (strcmp(name, "checkbox") == 0) {
widget = gnt_check_box_new(content);
} else if (strcmp(name, "tree") == 0) {
widget = gnt_tree_new();
} else if (strcmp(name, "textview") == 0) {
widget = gnt_text_view_new();
} else if (strcmp(name + 1, "line") == 0) {
widget = gnt_line_new(*name == 'v');
}
xmlFree(content);
if (widget == NULL) {
gnt_warning("Invalid widget name %s", name);
return NULL;
}
id = (char*)xmlGetProp(node, (xmlChar*)"id");
if (id) {
int i;
if (sscanf(id, "%d", &i) == 1 && i >= 0 && i < max) {
*data[i] = widget;
xmlFree(id);
}
}
prop = (char*)xmlGetProp(node, (xmlChar*)"border");
if (prop) {
int val;
if (sscanf(prop, "%d", &val) == 1) {
if (val)
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_NO_BORDER);
else
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_BORDER);
}
xmlFree(prop);
}
prop = (char*)xmlGetProp(node, (xmlChar*)"shadow");
if (prop) {
int val;
if (sscanf(prop, "%d", &val) == 1) {
if (val)
GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_NO_BORDER);
else
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_BORDER);
}
xmlFree(prop);
}
return widget;
}
#endif
void gnt_util_parse_widgets(const char *string, int num, ...)
{
#ifndef NO_LIBXML
xmlParserCtxtPtr ctxt;
xmlDocPtr doc;
xmlNodePtr node;
va_list list;
GntWidget ***data;
int id;
ctxt = xmlNewParserCtxt();
doc = xmlCtxtReadDoc(ctxt, (xmlChar*)string, NULL, NULL, XML_PARSE_NOBLANKS);
data = g_new0(GntWidget **, num);
va_start(list, num);
for (id = 0; id < num; id++)
data[id] = va_arg(list, gpointer);
node = xmlDocGetRootElement(doc);
gnt_widget_from_xmlnode(node, data, num);
xmlFreeDoc(doc);
xmlFreeParserCtxt(ctxt);
va_end(list);
g_free(data);
#endif
}
#ifndef NO_LIBXML
static void
util_parse_html_to_tv(xmlNode *node, GntTextView *tv, GntTextFormatFlags flag)
{
const char *name;
char *content;
xmlNode *ch;
char *url = NULL;
gboolean insert_nl_s = FALSE, insert_nl_e = FALSE;
if (node == NULL || node->name == NULL || node->type != XML_ELEMENT_NODE)
return;
name = (char*)node->name;
if (g_ascii_strcasecmp(name, "b") == 0 ||
g_ascii_strcasecmp(name, "strong") == 0 ||
g_ascii_strcasecmp(name, "i") == 0 ||
g_ascii_strcasecmp(name, "blockquote") == 0) {
flag |= GNT_TEXT_FLAG_BOLD;
} else if (g_ascii_strcasecmp(name, "u") == 0) {
flag |= GNT_TEXT_FLAG_UNDERLINE;
} else if (g_ascii_strcasecmp(name, "br") == 0) {
insert_nl_e = TRUE;
} else if (g_ascii_strcasecmp(name, "a") == 0) {
flag |= GNT_TEXT_FLAG_UNDERLINE;
url = (char *)xmlGetProp(node, (xmlChar*)"href");
} else if (g_ascii_strcasecmp(name, "h1") == 0 ||
g_ascii_strcasecmp(name, "h2") == 0 ||
g_ascii_strcasecmp(name, "h3") == 0 ||
g_ascii_strcasecmp(name, "h4") == 0 ||
g_ascii_strcasecmp(name, "h5") == 0 ||
g_ascii_strcasecmp(name, "h6") == 0) {
insert_nl_s = TRUE;
insert_nl_e = TRUE;
} else if (g_ascii_strcasecmp(name, "title") == 0) {
insert_nl_s = TRUE;
insert_nl_e = TRUE;
flag |= GNT_TEXT_FLAG_BOLD | GNT_TEXT_FLAG_UNDERLINE;
} else {
/* XXX: Process other possible tags */
}
if (insert_nl_s)
gnt_text_view_append_text_with_flags(tv, "\n", flag);
for (ch = node->children; ch; ch = ch->next) {
if (ch->type == XML_ELEMENT_NODE) {
util_parse_html_to_tv(ch, tv, flag);
} else if (ch->type == XML_TEXT_NODE) {
content = (char*)xmlNodeGetContent(ch);
gnt_text_view_append_text_with_flags(tv, content, flag);
xmlFree(content);
}
}
if (url) {
char *href = g_strdup_printf(" (%s)", url);
gnt_text_view_append_text_with_flags(tv, href, flag);
g_free(href);
xmlFree(url);
}
if (insert_nl_e)
gnt_text_view_append_text_with_flags(tv, "\n", flag);
}
#endif
gboolean gnt_util_parse_xhtml_to_textview(const char *string, GntTextView *tv)
{
#ifdef NO_LIBXML
return FALSE;
#else
xmlParserCtxtPtr ctxt;
xmlDocPtr doc;
xmlNodePtr node;
GntTextFormatFlags flag = GNT_TEXT_FLAG_NORMAL;
gboolean ret = FALSE;
ctxt = xmlNewParserCtxt();
doc = xmlCtxtReadDoc(ctxt, (xmlChar*)string, NULL, NULL, XML_PARSE_NOBLANKS | XML_PARSE_RECOVER);
if (doc) {
node = xmlDocGetRootElement(doc);
util_parse_html_to_tv(node, tv, flag);
xmlFreeDoc(doc);
ret = TRUE;
}
xmlFreeParserCtxt(ctxt);
return ret;
#endif
}
/* Setup trigger widget */
typedef struct {
char *text;
GntWidget *button;
} TriggerButton;
static void
free_trigger_button(TriggerButton *b)
{
g_free(b->text);
g_free(b);
}
static gboolean
key_pressed(GntWidget *widget, const char *text, TriggerButton *trig)
{
if (text && trig->text &&
strcmp(text, trig->text) == 0) {
gnt_widget_activate(trig->button);
return TRUE;
}
return FALSE;
}
void gnt_util_set_trigger_widget(GntWidget *wid, const char *text, GntWidget *button)
{
TriggerButton *tb = g_new0(TriggerButton, 1);
tb->text = g_strdup(text);
tb->button = button;
g_signal_connect(G_OBJECT(wid), "key_pressed", G_CALLBACK(key_pressed), tb);
g_signal_connect_swapped(G_OBJECT(button), "destroy", G_CALLBACK(free_trigger_button), tb);
}