From: Matthias Fehring <buschmann23@opensuse.org>
Date: 2018-11-17 09:20:00 +0100
Subject: fix mounting of LUKS2 volumes
Upstream: submitted (https://sourceforge.net/p/pam-mount/pam-mount/merge-requests/2/)

Cryptsetup version 2.0 added support for LUKS2.
This patch adds support for mounting LUKS2 volumes with pam_mount.

---
 crypto-dmc.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/src/crypto-dmc.c	2016-09-23 09:52:47.000000000 +0200
+++ b/src/crypto-dmc.c	2018-11-17 09:17:11.357766056 +0100
@@ -21,6 +21,12 @@
 #include "libcryptmount.h"
 #include "pam_mount.h"

+#ifndef CRYPT_LUKS
+#define CRYPT_LUKS NULL /* Passing NULL to crypt_load will
+                           default to LUKS(1) on older
+                           libcryptsetup versions. */
+#endif
+
 /**
  * dmc_is_luks - check if @path points to a LUKS volume (cf. normal dm-crypt)
  * @path:	path to the crypto container
@@ -48,7 +54,7 @@

 	ret = crypt_init(&cd, device);
 	if (ret == 0) {
-		ret = crypt_load(cd, CRYPT_LUKS1, NULL);
+		ret = crypt_load(cd, CRYPT_LUKS, NULL);
 		if (ret == -EINVAL)
 			ret = false;
 		else if (ret == 0)
@@ -106,7 +112,7 @@
 #endif
 	}

-	ret = crypt_load(cd, CRYPT_LUKS1, NULL);
+	ret = crypt_load(cd, CRYPT_LUKS, NULL);
 	if (ret == 0) {
 		ret = crypt_activate_by_passphrase(cd, mt->crypto_name,
 		      CRYPT_ANY_SLOT, req->key_data, req->key_size, flags);