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/* Krb5 Auth Applet -- Acquire and release kerberos tickets
*
* (C) 2010 Guido Guenther <agx@sigxcpu.org>
*
* This program 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, see <http://www.gnu.org/licenses/>.
*
*/
/* Create an entry buffer that uses the secmem routines for password storage */
#include "config.h"
#include <gtk/gtk.h>
#include <string.h>
#include "ka-entry-buffer.h"
#include "memory.h"
struct _KaEntryBuffer {
GtkEntryBuffer parent;
KaEntryBufferPrivate *priv;
};
struct _KaEntryBufferClass {
GtkEntryBufferClass parent_class;
};
G_DEFINE_TYPE (KaEntryBuffer, ka_entry_buffer, GTK_TYPE_ENTRY_BUFFER)
struct _KaEntryBufferPrivate {
gchar *password;
gsize password_size;
gsize password_bytes;
guint password_chars;
};
static const gchar *
ka_entry_buffer_pw_get_text (GtkEntryBuffer *buffer,
gsize * n_bytes)
{
KaEntryBuffer *self = KA_ENTRY_BUFFER(buffer);
if (n_bytes)
*n_bytes = self->priv->password_bytes;
if (!self->priv->password)
return "";
return self->priv->password;
}
static guint
ka_entry_buffer_pw_get_length (GtkEntryBuffer *buffer)
{
KaEntryBuffer *self = KA_ENTRY_BUFFER(buffer);
return self->priv->password_chars;
}
static guint
ka_entry_buffer_pw_insert_text (GtkEntryBuffer *buffer,
guint position,
const gchar *chars,
guint n_chars)
{
KaEntryBuffer *self = KA_ENTRY_BUFFER(buffer);
KaEntryBufferPrivate *pv = self->priv;
gsize prev_size;
gsize n_bytes;
gsize at;
n_bytes = g_utf8_offset_to_pointer (chars, n_chars) - chars;
/* Need more memory */
if (n_bytes + pv->password_bytes + 1 > pv->password_size) {
gchar *et_new;
prev_size = pv->password_size;
/* Calculate our new buffer size */
while (n_bytes + pv->password_bytes + 1 > pv->password_size) {
if (pv->password_size == 0)
pv->password_size = PW_MIN_SIZE;
else {
if (2 * pv->password_size < GTK_ENTRY_BUFFER_MAX_SIZE)
pv->password_size *= 2;
else {
pv->password_size = GTK_ENTRY_BUFFER_MAX_SIZE;
if (n_bytes >
pv->password_size - pv->password_bytes - 1) {
n_bytes =
pv->password_size - pv->password_bytes - 1;
n_bytes =
g_utf8_find_prev_char (chars,
chars + n_bytes + 1) -
chars;
n_chars = g_utf8_strlen (chars, n_bytes);
}
break;
}
}
}
et_new = secmem_malloc (pv->password_size);
memcpy (et_new, pv->password,
MIN (prev_size, pv->password_size));
secmem_free (pv->password);
pv->password = et_new;
}
/* Actual text insertion */
at = g_utf8_offset_to_pointer (pv->password,
position) - pv->password;
g_memmove (pv->password + at + n_bytes, pv->password + at,
pv->password_bytes - at);
memcpy (pv->password + at, chars, n_bytes);
/* Book keeping */
pv->password_bytes += n_bytes;
pv->password_chars += n_chars;
pv->password[pv->password_bytes] = '\0';
gtk_entry_buffer_emit_inserted_text (GTK_ENTRY_BUFFER(self), position, chars, n_chars);
return n_chars;
}
static guint
ka_entry_buffer_pw_delete_text (GtkEntryBuffer *buffer,
guint position, guint n_chars)
{
KaEntryBuffer *self = KA_ENTRY_BUFFER(buffer);
KaEntryBufferPrivate *pv = self->priv;
gsize start, end;
if (position > pv->password_chars)
position = pv->password_chars;
if (position + n_chars > pv->password_chars)
n_chars = pv->password_chars - position;
if (n_chars > 0) {
start =
g_utf8_offset_to_pointer (pv->password,
position) - pv->password;
end =
g_utf8_offset_to_pointer (pv->password,
position + n_chars) - pv->password;
g_memmove (pv->password + start, pv->password + end,
pv->password_bytes + 1 - end);
pv->password_chars -= n_chars;
pv->password_bytes -= (end - start);
gtk_entry_buffer_emit_deleted_text (GTK_ENTRY_BUFFER(self), position, n_chars);
}
return n_chars;
}
static void
ka_entry_buffer_dispose (GObject *object)
{
G_OBJECT_CLASS (ka_entry_buffer_parent_class)->dispose (object);
}
static void
ka_entry_buffer_finalize (GObject *object)
{
KaEntryBuffer *self = KA_ENTRY_BUFFER(object);
if (self->priv->password) {
secmem_free (self->priv->password);
self->priv->password_size = 0;
self->priv->password_bytes = 0;
self->priv->password_chars = 0;
}
G_OBJECT_CLASS (ka_entry_buffer_parent_class)->finalize (object);
}
static void
ka_entry_buffer_class_init (KaEntryBufferClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkEntryBufferClass *eb_class = GTK_ENTRY_BUFFER_CLASS (klass);
g_type_class_add_private (klass, sizeof (KaEntryBufferPrivate));
eb_class->get_text = ka_entry_buffer_pw_get_text;
eb_class->get_length = ka_entry_buffer_pw_get_length;
eb_class->insert_text = ka_entry_buffer_pw_insert_text;
eb_class->delete_text = ka_entry_buffer_pw_delete_text;
object_class->dispose = ka_entry_buffer_dispose;
object_class->finalize = ka_entry_buffer_finalize;
}
static void
ka_entry_buffer_init (KaEntryBuffer *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE(self,
KA_TYPE_ENTRY_BUFFER,
KaEntryBufferPrivate);
self->priv->password = NULL;
self->priv->password_size = 0;
self->priv->password_bytes = 0;
self->priv->password_chars = 0;
}
KaEntryBuffer *
ka_entry_buffer_new (void)
{
return g_object_new (KA_TYPE_ENTRY_BUFFER, NULL);
}
/*
* vim:ts:sts=4:sw=4:et:
*/
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