#! /usr/bin/env perl
-# Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+# Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
#
-# Licensed under the OpenSSL license (the "License"). You may not use
+# Licensed under the Apache License 2.0 (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
plan tests => 5;
+# We want to know that an absurdly small number of bits isn't support
is(run(app([ 'openssl', 'genrsa', '-3', '-out', 'genrsatest.pem', '8'])), 0, "genrsa -3 8");
-ok(run(app([ 'openssl', 'genrsa', '-3', '-out', 'genrsatest.pem', '16'])), "genrsa -3 16");
-ok(run(app([ 'openssl', 'rsa', '-check', '-in', 'genrsatest.pem', '-noout'])), "rsa -check");
-ok(run(app([ 'openssl', 'genrsa', '-f4', '-out', 'genrsatest.pem', '16'])), "genrsa -f4 16");
-ok(run(app([ 'openssl', 'rsa', '-check', '-in', 'genrsatest.pem', '-noout'])), "rsa -check");
-unlink 'genrsatest.pem';
+
+# Depending on the shared library, we might have different lower limits.
+# Let's find it! This is a simple binary search
+# ------------------------------------------------------------
+# NOTE: $good may need an update in the future
+# ------------------------------------------------------------
+note "Looking for lowest amount of bits";
+my $bad = 3; # Log2 of number of bits (2 << 3 == 8)
+my $good = 11; # Log2 of number of bits (2 << 11 == 2048)
+while ($good > $bad + 1) {
+ my $checked = int(($good + $bad + 1) / 2);
+ if (run(app([ 'openssl', 'genrsa', '-3', '-out', 'genrsatest.pem',
+ 2 ** $checked ], stderr => undef))) {
+ note 2 ** $checked, " bits is good";
+ $good = $checked;
+ } else {
+ note 2 ** $checked, " bits is bad";
+ $bad = $checked;
+ }
+}
+$good++ if $good == $bad;
+$good = 2 ** $good;
+note "Found lowest allowed amount of bits to be $good";
+
+ok(run(app([ 'openssl', 'genrsa', '-3', '-out', 'genrsatest.pem', $good ])),
+ "genrsa -3 $good");
+ok(run(app([ 'openssl', 'rsa', '-check', '-in', 'genrsatest.pem', '-noout' ])),
+ "rsa -check");
+ok(run(app([ 'openssl', 'genrsa', '-f4', '-out', 'genrsatest.pem', $good ])),
+ "genrsa -f4 $good");
+ok(run(app([ 'openssl', 'rsa', '-check', '-in', 'genrsatest.pem', '-noout' ])),
+ "rsa -check");