612 lines
14 KiB
Diff
612 lines
14 KiB
Diff
Index: configure.in
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===================================================================
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--- configure.in.orig 2006-10-03 17:54:09.000000000 +0100
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+++ configure.in 2006-10-30 12:58:33.000000000 +0000
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@@ -1529,6 +1529,16 @@
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GTK_EXTRA_CFLAGS="$msnative_struct"
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fi
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+AC_ARG_ENABLE(display-migration,
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+ [AC_HELP_STRING([--enable-display-migration],
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+ [include support for GPE_CHANGE_DISPLAY protocol])],
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+ enable_migration=yes, enable_migration=no)
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+if test "$enable_migration" = "yes"; then
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+ AC_DEFINE([ENABLE_MIGRATION], 1, [Define if display migration is enabled])
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+ GTK_DEP_LIBS="$GTK_DEP_LIBS -lgcrypt"
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+fi
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+AM_CONDITIONAL(ENABLE_MIGRATION, test $enable_migration = "yes")
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+
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AC_SUBST(GTK_PACKAGES)
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AC_SUBST(GTK_EXTRA_LIBS)
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AC_SUBST(GTK_EXTRA_CFLAGS)
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Index: gtk/Makefile.am
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===================================================================
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--- gtk/Makefile.am.orig 2006-10-02 18:27:53.000000000 +0100
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+++ gtk/Makefile.am 2006-10-30 12:59:14.000000000 +0000
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@@ -589,6 +589,11 @@
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gtkwindow-decorate.c \
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gtkwindow.c \
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$(gtk_clipboard_dnd_c_sources)
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+
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+if ENABLE_MIGRATION
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+gtk_base_c_sources += gtkmigration.c
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+endif
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+
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gtk_c_sources = $(gtk_base_c_sources)
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gtk_all_c_sources = $(gtk_base_c_sources)
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Index: gtk/gtkmain.c
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===================================================================
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--- gtk/gtkmain.c.orig 2006-09-03 06:31:21.000000000 +0100
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+++ gtk/gtkmain.c 2006-10-30 12:56:34.000000000 +0000
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@@ -507,6 +507,10 @@
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_gtk_accel_map_init ();
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_gtk_rc_init ();
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+#ifdef ENABLE_MIGRATION
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+ gtk_migration_init ();
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+#endif
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+
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/* Set the 'initialized' flag.
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*/
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gtk_initialized = TRUE;
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Index: gtk/gtkmigration.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ gtk/gtkmigration.c 2006-10-30 12:56:34.000000000 +0000
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@@ -0,0 +1,529 @@
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+/*
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+ * Copyright (C) 2003, 2005 Philip Blundell <philb@gnu.org>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version
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+ * 2 of the License, or (at your option) any later version.
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+ */
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+
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+#include <stdlib.h>
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+#include <ctype.h>
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+#include <libintl.h>
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+#include <string.h>
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+#include <assert.h>
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+
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+#include <X11/X.h>
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+#include <X11/Xlib.h>
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+#include <X11/Xatom.h>
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+
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+#include <gcrypt.h>
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+
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+#include "gtk.h"
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+#include "gdk.h"
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+#include "x11/gdkx.h"
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+
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+#define _(x) gettext(x)
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+
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+static GdkAtom string_gdkatom, display_change_gdkatom;
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+static GdkAtom rsa_challenge_gdkatom;
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+
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+#define DISPLAY_CHANGE_SUCCESS 0
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+#define DISPLAY_CHANGE_UNABLE_TO_CONNECT 1
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+#define DISPLAY_CHANGE_NO_SUCH_SCREEN 2
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+#define DISPLAY_CHANGE_AUTHENTICATION_BAD 3
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+#define DISPLAY_CHANGE_INDETERMINATE_ERROR 4
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+
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+static gboolean no_auth;
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+
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+static GSList *all_widgets;
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+
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+static gboolean gtk_migration_initialised;
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+
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+#define CHALLENGE_LEN 64
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+
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+gchar *gtk_migration_auth_challenge_string;
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+
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+static unsigned char challenge_bytes[CHALLENGE_LEN];
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+static unsigned long challenge_seq;
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+
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+#define hexbyte(x) ((x) >= 10 ? (x) + 'a' - 10 : (x) + '0')
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+
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+struct rsa_key
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+{
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+ gcry_mpi_t n, e, d, p, q, u;
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+};
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+
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+static gcry_mpi_t
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+mpi_from_sexp (gcry_sexp_t r, char *tag)
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+{
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+ gcry_sexp_t s = gcry_sexp_find_token (r, tag, 0);
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+ return gcry_sexp_nth_mpi (s, 1, GCRYMPI_FMT_USG);
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+}
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+
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+static char *
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+hex_from_mpi (gcry_mpi_t m)
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+{
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+ char *buf;
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+ gcry_mpi_aprint (GCRYMPI_FMT_HEX, (void *)&buf, NULL, m);
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+ return buf;
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+}
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+
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+static void
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+gtk_migration_crypt_create_hash (char *display, char *challenge, size_t len, char *result)
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+{
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+ size_t dlen = strlen (display);
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+ gchar *buf = g_malloc (dlen + 1 + len);
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+ strcpy (buf, display);
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+ memcpy (buf + dlen + 1, challenge, len);
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+ gcry_md_hash_buffer (GCRY_MD_SHA1, result, buf, len + dlen + 1);
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+ g_free (buf);
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+}
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+
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+static int
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+do_encode_md (const unsigned char *digest, size_t digestlen, int algo,
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+ unsigned int nbits, gcry_mpi_t *r_val)
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+{
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+ int nframe = (nbits+7) / 8;
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+ unsigned char *frame;
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+ int i, n;
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+ unsigned char asn[100];
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+ size_t asnlen;
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+
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+ asnlen = sizeof(asn);
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+ if (gcry_md_algo_info (algo, GCRYCTL_GET_ASNOID, asn, &asnlen))
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+ return -1;
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+
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+ if (digestlen + asnlen + 4 > nframe )
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+ return -1;
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+
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+ /* We encode the MD in this way:
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+ *
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+ * 0 1 PAD(n bytes) 0 ASN(asnlen bytes) MD(len bytes)
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+ *
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+ * PAD consists of FF bytes.
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+ */
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+ frame = g_malloc (nframe);
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+ n = 0;
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+ frame[n++] = 0;
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+ frame[n++] = 1; /* block type */
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+ i = nframe - digestlen - asnlen -3 ;
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+ assert ( i > 1 );
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+ memset ( frame+n, 0xff, i ); n += i;
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+ frame[n++] = 0;
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+ memcpy ( frame+n, asn, asnlen ); n += asnlen;
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+ memcpy ( frame+n, digest, digestlen ); n += digestlen;
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+ assert ( n == nframe );
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+
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+ gcry_mpi_scan (r_val, GCRYMPI_FMT_USG, frame, nframe, &nframe);
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+ g_free (frame);
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+ return 0;
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+}
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+
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+static gboolean
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+gtk_migration_crypt_check_signature (struct rsa_key *k, char *hash, char *sigbuf)
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+{
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+ gcry_mpi_t mpi, mpi2;
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+ gcry_sexp_t data, sig, key;
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+ int rc;
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+
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+ do_encode_md (hash, 20, GCRY_MD_SHA1, 1024, &mpi);
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+
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+ gcry_sexp_build (&data, NULL, "(data (value %m))", mpi);
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+
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+ gcry_mpi_release (mpi);
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+
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+ gcry_sexp_build (&key, NULL, "(public-key (rsa (n %m) (e %m)))", k->n, k->e);
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+
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+ if (gcry_mpi_scan (&mpi2, GCRYMPI_FMT_HEX, sigbuf, 0, NULL))
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+ {
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+ gcry_sexp_release (data);
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+ return FALSE;
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+ }
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+
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+ gcry_sexp_build (&sig, NULL, "(sig-val (rsa (s %m)))", mpi2);
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+
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+ rc = gcry_pk_verify (sig, data, key);
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+
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+ gcry_sexp_release (data);
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+ gcry_sexp_release (key);
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+ gcry_sexp_release (sig);
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+ gcry_mpi_release (mpi2);
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+
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+ if (rc)
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+ return FALSE;
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+
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+ return TRUE;
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+}
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+
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+static void
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+gtk_migration_auth_update_challenge (void)
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+{
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+ int i;
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+ unsigned char *p;
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+
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+ if (gtk_migration_auth_challenge_string == NULL)
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+ gtk_migration_auth_challenge_string = g_malloc ((CHALLENGE_LEN * 2) + 9);
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+
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+ p = gtk_migration_auth_challenge_string;
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+
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+ for (i = 0; i < CHALLENGE_LEN; i++)
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+ {
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+ *p++ = hexbyte (challenge_bytes[i] >> 4);
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+ *p++ = hexbyte (challenge_bytes[i] & 15);
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+ }
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+
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+ sprintf (p, "%08lx", challenge_seq++);
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+}
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+
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+static void
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+gtk_migration_auth_generate_challenge (void)
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+{
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+ gcry_randomize (challenge_bytes, sizeof (challenge_bytes), GCRY_STRONG_RANDOM);
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+ gtk_migration_auth_update_challenge ();
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+}
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+
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+static struct rsa_key *
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+parse_pubkey (char *s)
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+{
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+ struct rsa_key *r;
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+ gcry_mpi_t n, e;
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+ gchar *sp;
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+
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+ sp = strtok (s, " \n");
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+ gcry_mpi_scan (&e, GCRYMPI_FMT_HEX, sp, 0, NULL);
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+ sp = strtok (NULL, " \n");
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+ gcry_mpi_scan (&n, GCRYMPI_FMT_HEX, sp, 0, NULL);
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+
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+ r = g_malloc0 (sizeof (struct rsa_key));
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+ r->e = e;
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+ r->n = n;
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+ return r;
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+}
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+
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+static struct rsa_key *
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+lookup_pubkey (u_int32_t id)
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+{
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+ const gchar *home_dir = g_get_home_dir ();
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+ gchar *filename = g_strdup_printf ("%s/.gpe/migrate/public", home_dir);
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+ FILE *fp = fopen (filename, "r");
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+ struct rsa_key *r = NULL;
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+
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+ if (fp)
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+ {
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+ while (!feof (fp))
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+ {
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+ char buffer[4096];
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+ if (fgets (buffer, 4096, fp))
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+ {
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+ char *p;
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+ u_int32_t this_id = strtoul (buffer, &p, 16);
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+ if (p != buffer && *p == ' ')
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+ {
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+#ifdef DEBUG
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+ fprintf (stderr, "found id %x\n", this_id);
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+#endif
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+ if (this_id == id)
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+ {
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+ r = parse_pubkey (++p);
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+ break;
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+ }
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+ }
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+ }
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+ }
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+ fclose (fp);
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+ }
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+
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+ g_free (filename);
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+ return r;
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+}
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+
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+static void
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+free_pubkey (struct rsa_key *k)
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+{
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+ gcry_mpi_release (k->n);
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+ gcry_mpi_release (k->e);
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+
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+ g_free (k);
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+}
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+
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+static gboolean
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+gtk_migration_auth_validate_request (char *display, char *data)
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+{
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+ u_int32_t key_id;
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+ char *ep;
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+ char *p;
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+ struct rsa_key *k;
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+ char hash[20];
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+ gboolean rc;
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+
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+ p = strchr (data, ' ');
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+ if (p == NULL)
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+ return FALSE;
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+ *p++ = 0;
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+
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+ key_id = strtoul (data, &ep, 16);
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+ if (*ep)
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+ return FALSE;
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+
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+ k = lookup_pubkey (key_id);
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+ if (k == NULL)
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+ return FALSE;
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+
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+ gtk_migration_crypt_create_hash (display, gtk_migration_auth_challenge_string,
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+ strlen (gtk_migration_auth_challenge_string), hash);
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+
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+ rc = gtk_migration_crypt_check_signature (k, hash, p);
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+
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+ free_pubkey (k);
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+
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+ return rc;
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+}
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+
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+static int
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+do_change_display (GtkWidget *w, char *display_name)
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+{
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+ GdkDisplay *newdisplay;
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+ guint screen_nr = 1;
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+ guint i;
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+
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+ if (display_name[0] == 0)
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+ return DISPLAY_CHANGE_INDETERMINATE_ERROR;
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+
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+ i = strlen (display_name) - 1;
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+ while (i > 0 && isdigit (display_name[i]))
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+ i--;
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+
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+ if (display_name[i] == '.')
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+ {
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+ screen_nr = atoi (display_name + i + 1);
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+ display_name[i] = 0;
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+ }
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+
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+ newdisplay = gdk_display_open (display_name);
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+ if (newdisplay)
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+ {
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+ GdkScreen *screen = gdk_display_get_screen (newdisplay, screen_nr);
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+ if (screen)
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+ {
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+ gtk_window_set_screen (GTK_WINDOW (w), screen);
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+ gdk_display_manager_set_default_display (gdk_display_manager_get (),
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+ newdisplay);
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+ return DISPLAY_CHANGE_SUCCESS;
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+ }
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+ else
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+ return DISPLAY_CHANGE_NO_SUCH_SCREEN;
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+ }
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+
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+ return DISPLAY_CHANGE_UNABLE_TO_CONNECT;
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+}
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+
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+static void
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+set_challenge_on_window (GdkWindow *window)
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+{
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+ gdk_property_change (window, rsa_challenge_gdkatom, string_gdkatom,
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+ 8, GDK_PROP_MODE_REPLACE, gtk_migration_auth_challenge_string,
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+ strlen (gtk_migration_auth_challenge_string));
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+}
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+
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+static void
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+update_challenge_on_windows (void)
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+{
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+ GSList *i;
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+
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+ gtk_migration_auth_update_challenge ();
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+
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+ for (i = all_widgets; i; i = i->next)
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+ {
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+ GtkWidget *w = GTK_WIDGET (i->data);
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+ if (w->window)
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+ set_challenge_on_window (w->window);
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+ }
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+}
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+
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+static void
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+reset_state (GdkWindow *window)
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+{
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+ gdk_property_change (window, display_change_gdkatom, string_gdkatom,
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+ 8, GDK_PROP_MODE_REPLACE, NULL, 0);
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+}
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+
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+static void
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+generate_response (GdkDisplay *gdisplay, Display *dpy, Window window, int code)
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+{
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+ XClientMessageEvent ev;
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+ Atom atom = gdk_x11_atom_to_xatom_for_display (gdisplay,
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+ display_change_gdkatom);
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+
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+ memset (&ev, 0, sizeof (ev));
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+
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+ ev.type = ClientMessage;
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+ ev.window = window;
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+ ev.message_type = atom;
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+ ev.format = 32;
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+
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+ ev.data.l[0] = window;
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+ ev.data.l[1] = code;
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+
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+ XSendEvent (dpy, DefaultRootWindow (dpy), False, SubstructureNotifyMask, (XEvent *)&ev);
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+}
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+
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+static int
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+handle_request (GdkWindow *gwindow, char *prop)
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+{
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+ GtkWidget *widget;
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+ char *target, *auth_method, *auth_data;
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+ char *p;
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+
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+ target = prop;
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+ auth_method = "NULL";
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+ auth_data = NULL;
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+
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+ p = strchr (prop, ' ');
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+ if (p)
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+ {
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+ *p = 0;
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+ auth_method = ++p;
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+
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+ p = strchr (p, ' ');
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+ if (p)
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+ {
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+ *p = 0;
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+ auth_data = ++p;
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+ }
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+ }
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+
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+ if (no_auth == FALSE)
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+ {
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+ if (!strcasecmp (auth_method, "null"))
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+ return DISPLAY_CHANGE_AUTHENTICATION_BAD;
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+ else if (!strcasecmp (auth_method, "rsa-sig"))
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+ {
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+ if (gtk_migration_auth_validate_request (target, auth_data) == FALSE)
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+ return DISPLAY_CHANGE_AUTHENTICATION_BAD;
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+ }
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+ else
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+ return DISPLAY_CHANGE_AUTHENTICATION_BAD;
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+ }
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+
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+ gdk_window_get_user_data (gwindow, (gpointer*) &widget);
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+
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+ if (widget)
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+ return do_change_display (widget, target);
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+
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+ return DISPLAY_CHANGE_INDETERMINATE_ERROR;
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+}
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+
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+static GdkFilterReturn
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+filter_func (GdkXEvent *xevp, GdkEvent *ev, gpointer p)
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+{
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+ XPropertyEvent *xev = (XPropertyEvent *)xevp;
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+
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+ if (xev->type == PropertyNotify)
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+ {
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+ GdkDisplay *gdisplay;
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+ Atom atom;
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+
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+ gdisplay = gdk_x11_lookup_xdisplay (xev->display);
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+ if (gdisplay)
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+ {
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+ atom = gdk_x11_atom_to_xatom_for_display (gdisplay, display_change_gdkatom);
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+
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+ if (xev->atom == atom)
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+ {
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+ GdkWindow *gwindow;
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+
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+ gwindow = gdk_window_lookup_for_display (gdisplay, xev->window);
|
|
+
|
|
+ if (gwindow)
|
|
+ {
|
|
+ GdkAtom actual_type;
|
|
+ gint actual_format;
|
|
+ gint actual_length;
|
|
+ unsigned char *prop = NULL;
|
|
+
|
|
+ if (gdk_property_get (gwindow, display_change_gdkatom, string_gdkatom,
|
|
+ 0, G_MAXLONG, FALSE, &actual_type, &actual_format,
|
|
+ &actual_length, &prop))
|
|
+ {
|
|
+ if (actual_length != 0)
|
|
+ {
|
|
+ if (actual_type == string_gdkatom && actual_length > 8)
|
|
+ {
|
|
+ gchar *buf = g_malloc (actual_length + 1);
|
|
+ int rc;
|
|
+
|
|
+ memcpy (buf, prop, actual_length);
|
|
+ buf[actual_length] = 0;
|
|
+
|
|
+ rc = handle_request (gwindow, buf);
|
|
+
|
|
+ g_free (buf);
|
|
+ generate_response (gdisplay, xev->display, xev->window, rc);
|
|
+
|
|
+ if (rc == DISPLAY_CHANGE_SUCCESS)
|
|
+ update_challenge_on_windows ();
|
|
+ }
|
|
+
|
|
+ reset_state (gwindow);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (prop)
|
|
+ g_free (prop);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return GDK_FILTER_REMOVE;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return GDK_FILTER_CONTINUE;
|
|
+}
|
|
+
|
|
+static void
|
|
+unrealize_window (GtkWidget *w)
|
|
+{
|
|
+ all_widgets = g_slist_remove (all_widgets, w);
|
|
+}
|
|
+
|
|
+void
|
|
+gtk_migration_mark_window (GtkWidget *w)
|
|
+{
|
|
+ if (! gtk_migration_initialised)
|
|
+ {
|
|
+ g_warning ("gtk_migration not initialised yet");
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if (GTK_WIDGET_REALIZED (w))
|
|
+ {
|
|
+ GdkWindow *window = w->window;
|
|
+
|
|
+ gdk_window_add_filter (window, filter_func, NULL);
|
|
+
|
|
+ reset_state (window);
|
|
+ set_challenge_on_window (window);
|
|
+
|
|
+ all_widgets = g_slist_append (all_widgets, w);
|
|
+
|
|
+ g_signal_connect (G_OBJECT (w), "unrealize", G_CALLBACK (unrealize_window), NULL);
|
|
+ }
|
|
+ else
|
|
+ g_signal_connect (G_OBJECT (w), "realize", G_CALLBACK (gtk_migration_mark_window), NULL);
|
|
+}
|
|
+
|
|
+void
|
|
+gtk_migration_init (void)
|
|
+{
|
|
+ if (getenv ("GPE_DISPLAY_MIGRATION_NO_AUTH") != NULL)
|
|
+ no_auth = TRUE;
|
|
+
|
|
+ string_gdkatom = gdk_atom_intern ("STRING", FALSE);
|
|
+ display_change_gdkatom = gdk_atom_intern ("_GPE_DISPLAY_CHANGE", FALSE);
|
|
+ rsa_challenge_gdkatom = gdk_atom_intern ("_GPE_DISPLAY_CHANGE_RSA_CHALLENGE", FALSE);
|
|
+
|
|
+ gtk_migration_auth_generate_challenge ();
|
|
+
|
|
+ gtk_migration_initialised = TRUE;
|
|
+}
|
|
Index: gtk/gtkwindow.c
|
|
===================================================================
|
|
--- gtk/gtkwindow.c.orig 2006-10-03 16:51:46.000000000 +0100
|
|
+++ gtk/gtkwindow.c 2006-10-30 12:56:34.000000000 +0000
|
|
@@ -50,6 +50,9 @@
|
|
#include "x11/gdkx.h"
|
|
#endif
|
|
|
|
+extern void gtk_migration_mark_window (GtkWidget *w);
|
|
+
|
|
+
|
|
enum {
|
|
SET_FOCUS,
|
|
FRAME_EVENT,
|
|
@@ -823,6 +826,10 @@
|
|
|
|
g_signal_connect (window->screen, "composited_changed",
|
|
G_CALLBACK (gtk_window_on_composited_changed), window);
|
|
+
|
|
+#ifdef ENABLE_MIGRATION
|
|
+ gtk_migration_mark_window (window);
|
|
+#endif
|
|
}
|
|
|
|
static void
|