Add a test for 'openssl passwd'

Also, enlarge test group 20 to include openssl commands that aren't
tested otherwise
Reviewed-by: NRich Salz <rsalz@openssl.org>

test/README

@@ -22,7 +22,7 @@ The number {nn} is (somewhat loosely) grouped as follows:
 05  individual symmetric cipher algorithms
 10  math (bignum)
 15  individual asymmetric cipher algorithms
-20  openssl enc
+20  openssl commands (some otherwise not tested)
 25  certificate forms, generation and verification
 30  engine and evp
 70  PACKET layer

test/recipes/20-test_passwd.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 OpenSSL::Test;
+
+setup("test_passwd");
+
+plan tests => 6;
+
+ok(compare1stline([qw{openssl passwd password}], '^.{13}\R$'),
+   'crypt password with random salt');
+ok(compare1stline([qw{openssl passwd -1 password}], '^\$1\$.{8}\$.{22}\R$'),
+   'BSD style MD5 password with random salt');
+ok(compare1stline([qw{openssl passwd -apr1 password}], '^\$apr1\$.{8}\$.{22}\R$'),
+   'Apache style MD5 password with random salt');
+ok(compare1stline([qw{openssl passwd -salt xx password}], '^xxj31ZMTZzkVA\R$'),
+   'crypt password with salt xx');
+ok(compare1stline([qw{openssl passwd -salt xxxxxxxx -1 password}], '^\$1\$xxxxxxxx\$UYCIxa628\.9qXjpQCjM4a\.\R$'),
+   'BSD style MD5 password with salt xxxxxxxx');
+ok(compare1stline([qw{openssl passwd -salt xxxxxxxx -apr1 password}], '^\$apr1\$xxxxxxxx\$dxHfLAsjHkDRmG83UXe8K0\R$'),
+   'Apache style MD5 password with salt xxxxxxxx');
+
+
+sub compare1stline {
+    my ($cmdarray, $regexp) = @_;
+    my @lines = run(app($cmdarray), capture => 1);
+
+    return $lines[0] =~ m|$regexp|;
+}