tpm2d: add tests for the tpm2daemon

* configure.ac: Detect TPM emulator and enable tests.
* tests/tpm2dtests/: New test suite.
* tests/Makefile.am: Run tests.

--
Add a set of tests that exercise tpm2daemon handling of keys and
verify compatibility with non-tpm based keys.

Running this test infrastructure requires a tpm emulator, which is
tested for during configuration.  If an emulator is not found, the
tests won't be run since they require the presence of a TPM (although
the TPM handling code will still be built).

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

- Fixed tests/Makefile.am for make distcheck.

Signed-off-by: Werner Koch <wk@gnupg.org>

tests/tpm2dtests/shell.scm

@@ -0,0 +1,51 @@
+#!/usr/bin/env gpgscm
+
+;; Copyright (C) 2016 g10 Code GmbH
+;;
+;; This file is part of GnuPG.
+;;
+;; GnuPG 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 3 of the License, or
+;; (at your option) any later version.
+;;
+;; GnuPG 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/>.
+
+(load (in-srcdir "tests" "tpm2dtests" "defs.scm"))
+
+;; This is not a test, but can be used to inspect the test
+;; environment.  Simply execute
+;;
+;;   make -Ctests/tpm2dtests check TESTS=shell.scm
+;;
+;; to run it.
+
+(setup-environment)
+
+(if (prompt-yes-no? "Drop 'batch' from gpg.conf" #t)
+    (apply create-file
+	   (cons "gpg.conf"
+		 (filter (lambda (line) (not (equal? "batch" line)))
+			 (string-split-newlines
+			  (call-with-input-file "gpg.conf" read-all)))))
+    (begin
+      (echo "Note that gpg.conf includes 'batch'.  If you want to use gpg")
+      (echo "interactively you should drop that.")))
+
+;; Add paths to tools to PATH.
+(setenv "PATH" (pathsep-join
+		(append (map (lambda (t) (dirname (tool t)))
+			     '(gpg gpg-agent scdaemon gpgsm dirmngr gpgconf tpm2daemon))
+			(pathsep-split (getenv "PATH"))))
+	#t)
+
+(echo "\nEnjoy your test environment. "
+      "Type 'exit' to exit it, it will be cleaned up after you.\n")
+
+(interactive-shell)