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From 12d00da84239c3dcc4560dc60a0c36d534908cc0 Mon Sep 17 00:00:00 2001
From: Ondrej Kozina <okozina@redhat.com>
Date: Wed, 4 Jul 2018 15:39:11 +0200
Subject: [PATCH 1/6] Add blkid utilities for fast detection of device
signatures.
---
configure.ac | 21 ++++++++
lib/Makemodule.am | 5 +-
lib/utils_blkid.c | 158 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
lib/utils_blkid.h | 48 +++++++++++++++++
4 files changed, 231 insertions(+), 1 deletion(-)
create mode 100644 lib/utils_blkid.c
create mode 100644 lib/utils_blkid.h
diff --git a/configure.ac b/configure.ac
index 05da6d6..31508d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -415,6 +415,26 @@ if test x$enable_internal_argon2 = xyes ; then
fi
AM_CONDITIONAL(CRYPTO_INTERNAL_ARGON2, test x$enable_internal_argon2 = xyes)
+dnl Link with blkid to check for other device types
+AC_ARG_ENABLE(blkid, AS_HELP_STRING([--disable-blkid],
+ [disable use of blkid for device signature detection and wiping.]), [], [enable_blkid=yes])
+
+if test x$enable_blkid = xyes ; then
+ PKG_CHECK_MODULES([BLKID], [blkid],[AC_DEFINE([HAVE_BLKID], 1, [Define to 1 to use blkid for detection of disk signatures.])],[LIBBLKID_LIBS="-lblkid"])
+
+ AC_CHECK_HEADERS(blkid/blkid.h,,[AC_MSG_ERROR([You need blkid development library installed.])])
+ AC_CHECK_DECLS([ blkid_reset_probe,
+ blkid_probe_set_device,
+ blkid_probe_filter_superblocks_type,
+ blkid_do_safeprobe,
+ blkid_do_probe,
+ blkid_probe_lookup_value
+ ],,
+ [AC_MSG_ERROR([Can not compile with blkid support, disable it by --disable-blkid.])],
+ [#include <blkid/blkid.h>])
+fi
+AM_CONDITIONAL(HAVE_BLKID, test x$enable_blkid = xyes)
+
dnl Magic for cryptsetup.static build.
if test x$enable_static_cryptsetup = xyes; then
saved_PKG_CONFIG=$PKG_CONFIG
@@ -465,6 +485,7 @@ AC_SUBST([CRYPTO_STATIC_LIBS])
AC_SUBST([JSON_C_LIBS])
AC_SUBST([LIBARGON2_LIBS])
+AC_SUBST([BLKID_LIBS])
AC_SUBST([LIBCRYPTSETUP_VERSION])
AC_SUBST([LIBCRYPTSETUP_VERSION_INFO])
diff --git a/lib/Makemodule.am b/lib/Makemodule.am
index 5e20039..26178b8 100644
--- a/lib/Makemodule.am
+++ b/lib/Makemodule.am
@@ -30,6 +30,7 @@ libcryptsetup_la_LIBADD = \
@CRYPTO_LIBS@ \
@LIBARGON2_LIBS@ \
@JSON_C_LIBS@ \
+ @BLKID_LIBS@ \
libcrypto_backend.la
libcryptsetup_la_SOURCES = \
@@ -92,4 +93,6 @@ libcryptsetup_la_SOURCES = \
lib/luks2/luks2_token_keyring.c \
lib/luks2/luks2_token.c \
lib/luks2/luks2_internal.h \
- lib/luks2/luks2.h
+ lib/luks2/luks2.h \
+ lib/utils_blkid.c \
+ lib/utils_blkid.h
diff --git a/lib/utils_blkid.c b/lib/utils_blkid.c
new file mode 100644
index 0000000..7425bc5
--- /dev/null
+++ b/lib/utils_blkid.c
@@ -0,0 +1,158 @@
+/*
+ * blkid probe utilities
+ *
+ * Copyright (C) 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "utils_blkid.h"
+
+#ifdef HAVE_BLKID
+#include <blkid/blkid.h>
+struct blkid_handle {
+ int fd;
+ blkid_probe pr;
+};
+#endif
+
+void blk_set_chains_for_fast_detection(struct blkid_handle *h)
+{
+#ifdef HAVE_BLKID
+ blkid_probe_enable_partitions(h->pr, 1);
+ blkid_probe_set_partitions_flags(h->pr, 0);
+
+ blkid_probe_enable_superblocks(h->pr, 1);
+ blkid_probe_set_superblocks_flags(h->pr, BLKID_SUBLKS_TYPE);
+#endif
+}
+
+int blk_init_by_path(struct blkid_handle **h, const char *path)
+{
+ int r = -ENOTSUP;
+#ifdef HAVE_BLKID
+ struct blkid_handle *tmp = malloc(sizeof(*tmp));
+ if (!tmp)
+ return -ENOMEM;
+
+ tmp->fd = -1;
+
+ tmp->pr = blkid_new_probe_from_filename(path);
+ if (!tmp->pr) {
+ free(tmp);
+ return -EINVAL;
+ }
+
+ *h = tmp;
+
+ r = 0;
+#endif
+ return r;
+}
+
+int blk_superblocks_filter_luks(struct blkid_handle *h)
+{
+ int r = -ENOTSUP;
+#ifdef HAVE_BLKID
+ char *luks_filter[] = {
+ "crypto_LUKS",
+ NULL
+ };
+ r = blkid_probe_filter_superblocks_type(h->pr, BLKID_FLTR_NOTIN, luks_filter);
+#endif
+ return r;
+}
+
+blk_probe_status blk_safeprobe(struct blkid_handle *h)
+{
+ int r = -1;
+#ifdef HAVE_BLKID
+ r = blkid_do_safeprobe(h->pr);
+#endif
+ switch (r) {
+ case -2:
+ return PRB_AMBIGUOUS;
+ case 1:
+ return PRB_EMPTY;
+ case 0:
+ return PRB_OK;
+ default:
+ return PRB_FAIL;
+ }
+}
+
+int blk_is_partition(struct blkid_handle *h)
+{
+ int r = 0;
+#ifdef HAVE_BLKID
+ r = blkid_probe_has_value(h->pr, "PTTYPE");
+#endif
+ return r;
+}
+
+int blk_is_superblock(struct blkid_handle *h)
+{
+ int r = 0;
+#ifdef HAVE_BLKID
+ r = blkid_probe_has_value(h->pr, "TYPE");
+#endif
+ return r;
+}
+
+const char *blk_get_partition_type(struct blkid_handle *h)
+{
+ const char *value = NULL;
+#ifdef HAVE_BLKID
+ (void) blkid_probe_lookup_value(h->pr, "PTTYPE", &value, NULL);
+#endif
+ return value;
+}
+
+const char *blk_get_superblock_type(struct blkid_handle *h)
+{
+ const char *value = NULL;
+#ifdef HAVE_BLKID
+ (void) blkid_probe_lookup_value(h->pr, "TYPE", &value, NULL);
+#endif
+ return value;
+}
+
+void blk_free(struct blkid_handle *h)
+{
+#ifdef HAVE_BLKID
+ if (!h)
+ return;
+
+ if (h->pr)
+ blkid_free_probe(h->pr);
+
+ free(h);
+#endif
+}
+
+int blk_supported(void)
+{
+ int r = 0;
+#ifdef HAVE_BLKID
+ r = 1;
+#endif
+ return r;
+}
diff --git a/lib/utils_blkid.h b/lib/utils_blkid.h
new file mode 100644
index 0000000..d18b0a0
--- /dev/null
+++ b/lib/utils_blkid.h
@@ -0,0 +1,48 @@
+/*
+ * blkid probe utilities
+ *
+ * Copyright (C) 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _UTILS_BLKID_H
+#define _UTILS_BLKID_H
+
+struct blkid_handle;
+
+typedef enum { PRB_OK = 0, PRB_EMPTY, PRB_AMBIGUOUS, PRB_FAIL } blk_probe_status;
+
+int blk_init_by_path(struct blkid_handle **h, const char *path);
+
+void blk_free(struct blkid_handle *h);
+
+void blk_set_chains_for_fast_detection(struct blkid_handle *h);
+
+int blk_superblocks_filter_luks(struct blkid_handle *h);
+
+blk_probe_status blk_safeprobe(struct blkid_handle *h);
+
+int blk_is_partition(struct blkid_handle *h);
+
+int blk_is_superblock(struct blkid_handle *h);
+
+const char *blk_get_partition_type(struct blkid_handle *h);
+
+const char *blk_get_superblock_type(struct blkid_handle *h);
+
+int blk_supported(void);
+
+#endif
--
1.8.3.1
--- cryptsetup-2.0.3.old/aclocal.m4 2018-05-03 21:36:53.000000000 +0200
+++ cryptsetup-2.0.3/aclocal.m4 2018-07-16 15:37:34.935817650 +0200
@@ -31,7 +31,7 @@ To do so, use the procedure documented b
# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
-# Last-changed: 2014-10-02
+# Last-changed: 2018-07-16
dnl AM_PATH_LIBGCRYPT([MINIMUM-VERSION,