From d7e7008c1f4318e2ebd375fed75362711ebdbb2c Mon Sep 17 00:00:00 2001
From: Fedor Indutny <fedor@indutny.com>
Date: Mon, 24 Nov 2014 16:17:13 +0300
Subject: [PATCH] crypto: throw if the key doesn't match cert

fix joyent/node#8770
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
PR-URL: https://github.com/node-forward/node/pull/66
---
 lib/_tls_common.js                   | 42 ++++++++++++++++++++----------------
 src/node_crypto.cc                   |  9 +++++++-
 test/simple/test-tls-key-mismatch.js | 42 ++++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+), 20 deletions(-)
 create mode 100644 test/simple/test-tls-key-mismatch.js

diff --git a/lib/_tls_common.js b/lib/_tls_common.js
index e66ae66..a3309ea 100644
--- a/lib/_tls_common.js
+++ b/lib/_tls_common.js
@@ -65,25 +65,6 @@ exports.createSecureContext = function createSecureContext(options, context) {
 
   if (context) return c;
 
-  if (options.key) {
-    if (Array.isArray(options.key)) {
-      for (var i = 0; i < options.key.length; i++) {
-        var key = options.key[i];
-
-        if (key.passphrase)
-          c.context.setKey(key.pem, key.passphrase);
-        else
-          c.context.setKey(key);
-      }
-    } else {
-      if (options.passphrase) {
-        c.context.setKey(options.key, options.passphrase);
-      } else {
-        c.context.setKey(options.key);
-      }
-    }
-  }
-
   // NOTE: It's important to add CA before the cert to be able to load
   // cert's issuer in C++ code.
   if (options.ca) {
@@ -107,6 +88,29 @@ exports.createSecureContext = function createSecureContext(options, context) {
     }
   }
 
+  // NOTE: It is important to set the key after the cert.
+  // `ssl_set_pkey` returns `0` when the key does not much the cert, but
+  // `ssl_set_cert` returns `1` and nullifies the key in the SSL structure
+  // which leads to the crash later on.
+  if (options.key) {
+    if (Array.isArray(options.key)) {
+      for (var i = 0; i < options.key.length; i++) {
+        var key = options.key[i];
+
+        if (key.passphrase)
+          c.context.setKey(key.pem, key.passphrase);
+        else
+          c.context.setKey(key);
+      }
+    } else {
+      if (options.passphrase) {
+        c.context.setKey(options.key, options.passphrase);
+      } else {
+        c.context.setKey(options.key);
+      }
+    }
+  }
+
   if (options.ciphers)
     c.context.setCiphers(options.ciphers);
   else
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index bbc2b95..31b2b01 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -456,9 +456,16 @@ void SecureContext::SetKey(const FunctionCallbackInfo<Value>& args) {
     return ThrowCryptoError(env, err);
   }
 
-  SSL_CTX_use_PrivateKey(sc->ctx_, key);
+  int rv = SSL_CTX_use_PrivateKey(sc->ctx_, key);
   EVP_PKEY_free(key);
   BIO_free_all(bio);
+
+  if (!rv) {
+    unsigned long err = ERR_get_error();
+    if (!err)
+      return env->ThrowError("SSL_CTX_use_PrivateKey");
+    return ThrowCryptoError(env, err);
+  }
 }
 
 
diff --git a/test/simple/test-tls-key-mismatch.js b/test/simple/test-tls-key-mismatch.js
new file mode 100644
index 0000000..f99e947
--- /dev/null
+++ b/test/simple/test-tls-key-mismatch.js
@@ -0,0 +1,42 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+if (!process.versions.openssl) {
+  console.error('Skipping because node compiled without OpenSSL.');
+  process.exit(0);
+}
+
+var common = require('../common');
+var assert = require('assert');
+var tls = require('tls');
+var fs = require('fs');
+var fs = require('fs');
+
+var options = {
+  key: fs.readFileSync(common.fixturesDir + '/keys/agent1-key.pem'),
+  cert: fs.readFileSync(common.fixturesDir + '/keys/agent2-cert.pem')
+};
+
+var cert = null;
+
+assert.throws(function() {
+  tls.createSecureContext(options);
+});
-- 
2.7.4