Merge commit 'upstream/2.91.6'

1 files changed, 229 insertions, 0 deletions

diff --git a/src/ka-entry-buffer.c b/src/ka-entry-buffer.c
new file mode 100644
index 0000000..45587bf
--- /dev/null
+++ b/src/ka-entry-buffer.c
@@ -0,0 +1,229 @@
+/* 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+/* 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:
+ */