crypto: fail early when loading crypto without openssl

Fail early in require('crypto'), require('tls'),
require('https'), etc when crypto is not available
(rather than depending on an internal try/catch).

Add documentation for detecting when crypto is not available.

PR-URL: https://github.com/nodejs/node/pull/5611
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

1 files changed, 3 insertions, 6 deletions

diff --git a/lib/_tls_legacy.js b/lib/_tls_legacy.js
index bc293f0417..456679ff0d 100644
--- a/lib/_tls_legacy.js
+++ b/lib/_tls_legacy.js
@@ -1,5 +1,7 @@
 'use strict';
 
+require('internal/util').assertCrypto(exports);
+
 const assert = require('assert');
 const EventEmitter = require('events');
 const stream = require('stream');
@@ -9,12 +11,7 @@ const common = require('_tls_common');
 const debug = util.debuglog('tls-legacy');
 const Buffer = require('buffer').Buffer;
 const Timer = process.binding('timer_wrap').Timer;
-var Connection = null;
-try {
-  Connection = process.binding('crypto').Connection;
-} catch (e) {
-  throw new Error('Node.js is not compiled with openssl crypto support');
-}
+const Connection = process.binding('crypto').Connection;
 
 function SlabBuffer() {
   this.create();