Add a test of the X509_STORE / X509_LOOKUP API

Fortunately, "openssl verify" makes good use of that API
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2652)

test/recipes/60-test_x509_store.t

+#! /usr/bin/env perl
+# Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+
+use strict;
+use warnings;
+
+use File::Copy;
+use File::Spec::Functions qw/:DEFAULT canonpath/;
+use OpenSSL::Test qw/:DEFAULT srctop_file/;
+
+setup("test_x509_store");
+
+# We use 'openssl verify' for these tests, as it contains everything
+# we need to conduct these tests.  The tests here are a subset of the
+# ones found in 25-test_verify.t
+
+sub verify {
+    my ($cert, $purpose, $trustedpath, $untrusted, @opts) = @_;
+    my @args = qw(openssl verify -auth_level 1 -purpose);
+    my @path = qw(test certs);
+    push(@args, "$purpose", @opts);
+    push(@args, "-CApath", $trustedpath);
+    for (@$untrusted) { push(@args, "-untrusted", srctop_file(@path, "$_.pem")) }
+    push(@args, srctop_file(@path, "$cert.pem"));
+    run(app([@args]));
+}
+
+plan tests => 3;
+
+indir "60-test_x509_store" => sub {
+    for (("root-cert")) {
+        copy(srctop_file("test", "certs", "$_.pem"), curdir());
+    }
+    ok(run(app([qw(openssl rehash), curdir()])), "Rehashing");
+
+    # Canonical success
+    ok(verify("ee-cert", "sslserver", curdir(), ["ca-cert"], "-show_chain"),
+       "verify ee-cert");
+
+    # Failure because root cert not present in CApath
+    ok(!verify("ca-root2", "any", curdir(), [], "-show_chain"));
+}, create => 1, cleanup => 1;