Don't run openssl-requiring tests if openssl isn't present.

nselib/sasl.lua

@@ -465,6 +465,8 @@ end
 
 test_suite = unittest.TestSuite:new()
 
+-- Crypto tests require OpenSSL
+if HAVE_SSL then
   local _ = "ignored"
 
   local object = DigestMD5:new('Digest realm="test", domain="/HTTP/Digest",\z
@@ -503,5 +505,6 @@ test_suite:add_test(unittest.keys_equal(
         domain='/HTTP/Digest',
       }
     ))
+end
 
 return _ENV;

nselib/vnc.lua

@@ -792,6 +792,8 @@ if not unittest.testing() then
 end
 
 test_suite = unittest.TestSuite:new()
+-- Crypto tests require OpenSSL
+if HAVE_SSL then
   local test_vectors = {
     -- from John the Ripper's vnc_fmt_plug.c
     -- pass, challenge, response
@@ -821,5 +823,6 @@ for _, v in ipairs(test_vectors) do
     test_suite:add_test(unittest.equal(
       VNC:encryptVNCDES(v[1], v[2]), v[3]), v[1])
   end
+end
 
 return _ENV