tls: move legacy code into own file

PR-URL: #39333
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

lib/_tls_common.js

@@ -52,8 +52,11 @@ const {
 
 const {
   configSecureContext,
+} = require('internal/tls/secure-context');
+
+const {
   parseCertString,
-} = require('internal/tls');
+} = require('internal/tls/parse-cert-string');
 
 function toV(which, v, def) {
   if (v == null) v = def;

lib/internal/tls/parse-cert-string.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const {
+  ArrayIsArray,
+  ArrayPrototypeForEach,
+  ArrayPrototypePush,
+  StringPrototypeIndexOf,
+  StringPrototypeSlice,
+  StringPrototypeSplit,
+  ObjectCreate,
+} = primordials;
+
+// Example:
+// C=US\nST=CA\nL=SF\nO=Joyent\nOU=Node.js\nCN=ca1\nemailAddress=ry@clouds.org
+function parseCertString(s) {
+  const out = ObjectCreate(null);
+  ArrayPrototypeForEach(StringPrototypeSplit(s, '\n'), (part) => {
+    const sepIndex = StringPrototypeIndexOf(part, '=');
+    if (sepIndex > 0) {
+      const key = StringPrototypeSlice(part, 0, sepIndex);
+      const value = StringPrototypeSlice(part, sepIndex + 1);
+      if (key in out) {
+        if (!ArrayIsArray(out[key])) {
+          out[key] = [out[key]];
+        }
+        ArrayPrototypePush(out[key], value);
+      } else {
+        out[key] = value;
+      }
+    }
+  });
+  return out;
+}
+
+exports.parseCertString = parseCertString;

lib/internal/tls.js → lib/internal/tls/secure-context.js

@@ -5,12 +5,8 @@ const {
   ArrayPrototypeFilter,
   ArrayPrototypeForEach,
   ArrayPrototypeJoin,
-  ArrayPrototypePush,
-  StringPrototypeIndexOf,
-  StringPrototypeSlice,
   StringPrototypeSplit,
   StringPrototypeStartsWith,
-  ObjectCreate,
 } = primordials;
 
 const {
@@ -42,28 +38,6 @@ const {
   },
 } = internalBinding('constants');
 
-// Example:
-// C=US\nST=CA\nL=SF\nO=Joyent\nOU=Node.js\nCN=ca1\nemailAddress=ry@clouds.org
-function parseCertString(s) {
-  const out = ObjectCreate(null);
-  ArrayPrototypeForEach(StringPrototypeSplit(s, '\n'), (part) => {
-    const sepIndex = StringPrototypeIndexOf(part, '=');
-    if (sepIndex > 0) {
-      const key = StringPrototypeSlice(part, 0, sepIndex);
-      const value = StringPrototypeSlice(part, sepIndex + 1);
-      if (key in out) {
-        if (!ArrayIsArray(out[key])) {
-          out[key] = [out[key]];
-        }
-        ArrayPrototypePush(out[key], value);
-      } else {
-        out[key] = value;
-      }
-    }
-  });
-  return out;
-}
-
 function getDefaultEcdhCurve() {
   // We do it this way because DEFAULT_ECDH_CURVE can be
   // changed by users, so we need to grab the current
@@ -340,5 +314,4 @@ function configSecureContext(context, options = {}, name = 'options') {
 
 module.exports = {
   configSecureContext,
-  parseCertString,
 };

lib/internal/tls/secure-pair.js

@@ -0,0 +1,86 @@
+'use strict';
+
+const EventEmitter = require('events');
+const { Duplex } = require('stream');
+const _tls_wrap = require('_tls_wrap');
+const _tls_common = require('_tls_common');
+
+const {
+  Symbol,
+  ReflectConstruct,
+} = primordials;
+
+const kCallback = Symbol('Callback');
+const kOtherSide = Symbol('Other');
+
+class DuplexSocket extends Duplex {
+  constructor() {
+    super();
+    this[kCallback] = null;
+    this[kOtherSide] = null;
+  }
+
+  _read() {
+    const callback = this[kCallback];
+    if (callback) {
+      this[kCallback] = null;
+      callback();
+    }
+  }
+
+  _write(chunk, encoding, callback) {
+    if (chunk.length === 0) {
+      process.nextTick(callback);
+    } else {
+      this[kOtherSide].push(chunk);
+      this[kOtherSide][kCallback] = callback;
+    }
+  }
+
+  _final(callback) {
+    this[kOtherSide].on('end', callback);
+    this[kOtherSide].push(null);
+  }
+}
+
+class DuplexPair {
+  constructor() {
+    this.socket1 = new DuplexSocket();
+    this.socket2 = new DuplexSocket();
+    this.socket1[kOtherSide] = this.socket2;
+    this.socket2[kOtherSide] = this.socket1;
+  }
+}
+
+class SecurePair extends EventEmitter {
+  constructor(secureContext = _tls_common.createSecureContext(),
+              isServer = false,
+              requestCert = !isServer,
+              rejectUnauthorized = false,
+              options = {}) {
+    super();
+    const { socket1, socket2 } = new DuplexPair();
+
+    this.server = options.server;
+    this.credentials = secureContext;
+
+    this.encrypted = socket1;
+    this.cleartext = new _tls_wrap.TLSSocket(socket2, {
+      secureContext,
+      isServer,
+      requestCert,
+      rejectUnauthorized,
+      ...options
+    });
+    this.cleartext.once('secure', () => this.emit('secure'));
+  }
+
+  destroy() {
+    this.cleartext.destroy();
+    this.encrypted.destroy();
+  }
+}
+
+exports.createSecurePair = function createSecurePair(...args) {
+  return ReflectConstruct(SecurePair, args);
+};

lib/tls.js

@@ -32,7 +32,6 @@ const {
   ArrayPrototypeSome,
   ObjectDefineProperty,
   ObjectFreeze,
-  ReflectConstruct,
   RegExpPrototypeTest,
   StringFromCharCode,
   StringPrototypeCharCodeAt,
@@ -50,19 +49,18 @@ const {
 } = require('internal/errors').codes;
 const internalUtil = require('internal/util');
 internalUtil.assertCrypto();
-const internalTLS = require('internal/tls');
 const { isArrayBufferView } = require('internal/util/types');
 
 const net = require('net');
 const { getOptionValue } = require('internal/options');
 const { getRootCertificates, getSSLCiphers } = internalBinding('crypto');
 const { Buffer } = require('buffer');
-const EventEmitter = require('events');
 const { URL } = require('internal/url');
-const DuplexPair = require('internal/streams/duplexpair');
 const { canonicalizeIP } = internalBinding('cares_wrap');
 const _tls_common = require('_tls_common');
 const _tls_wrap = require('_tls_wrap');
+const { createSecurePair } = require('internal/tls/secure-pair');
+const { parseCertString } = require('internal/tls/parse-cert-string');
 
 // Allow {CLIENT_RENEG_LIMIT} client-initiated session renegotiations
 // every {CLIENT_RENEG_WINDOW} seconds. An error event is emitted if more
@@ -300,53 +298,20 @@ exports.checkServerIdentity = function checkServerIdentity(hostname, cert) {
   }
 };
 
-
-class SecurePair extends EventEmitter {
-  constructor(secureContext = exports.createSecureContext(),
-              isServer = false,
-              requestCert = !isServer,
-              rejectUnauthorized = false,
-              options = {}) {
-    super();
-    const { socket1, socket2 } = new DuplexPair();
-
-    this.server = options.server;
-    this.credentials = secureContext;
-
-    this.encrypted = socket1;
-    this.cleartext = new exports.TLSSocket(socket2, {
-      secureContext,
-      isServer,
-      requestCert,
-      rejectUnauthorized,
-      ...options
-    });
-    this.cleartext.once('secure', () => this.emit('secure'));
-  }
-
-  destroy() {
-    this.cleartext.destroy();
-    this.encrypted.destroy();
-  }
-}
-
-
-exports.parseCertString = internalUtil.deprecate(
-  internalTLS.parseCertString,
-  'tls.parseCertString() is deprecated. ' +
-  'Please use querystring.parse() instead.',
-  'DEP0076');
-
 exports.createSecureContext = _tls_common.createSecureContext;
 exports.SecureContext = _tls_common.SecureContext;
 exports.TLSSocket = _tls_wrap.TLSSocket;
 exports.Server = _tls_wrap.Server;
 exports.createServer = _tls_wrap.createServer;
 exports.connect = _tls_wrap.connect;
 
+exports.parseCertString = internalUtil.deprecate(
+  parseCertString,
+  'tls.parseCertString() is deprecated. ' +
+  'Please use querystring.parse() instead.',
+  'DEP0076');
+
 exports.createSecurePair = internalUtil.deprecate(
-  function createSecurePair(...args) {
-    return ReflectConstruct(SecurePair, args);
-  },
+  createSecurePair,
   'tls.createSecurePair() is deprecated. Please use ' +
   'tls.TLSSocket instead.', 'DEP0064');

src/node_native_module.cc

@@ -99,7 +99,9 @@ void NativeModuleLoader::InitializeModuleCategories() {
       "tls",
       "_tls_common",
       "_tls_wrap",
-      "internal/tls",
+      "internal/tls/secure-pair",
+      "internal/tls/parse-cert-string",
+      "internal/tls/secure-context",
       "internal/http2/core",
       "internal/http2/compat",
       "internal/policy/manifest",

test/parallel/test-tls-parse-cert-string.js

@@ -11,7 +11,7 @@ const {
 } = require('../common/hijackstdio');
 const assert = require('assert');
 // Flags: --expose-internals
-const internalTLS = require('internal/tls');
+const { parseCertString } = require('internal/tls/parse-cert-string');
 const tls = require('tls');
 
 const noOutput = common.mustNotCall();
@@ -20,7 +20,7 @@ hijackStderr(noOutput);
 {
   const singles = 'C=US\nST=CA\nL=SF\nO=Node.js Foundation\nOU=Node.js\n' +
                   'CN=ca1\nemailAddress=ry@clouds.org';
-  const singlesOut = internalTLS.parseCertString(singles);
+  const singlesOut = parseCertString(singles);
   assert.deepStrictEqual(singlesOut, {
     __proto__: null,
     C: 'US',
@@ -36,7 +36,7 @@ hijackStderr(noOutput);
 {
   const doubles = 'OU=Domain Control Validated\nOU=PositiveSSL Wildcard\n' +
                   'CN=*.nodejs.org';
-  const doublesOut = internalTLS.parseCertString(doubles);
+  const doublesOut = parseCertString(doubles);
   assert.deepStrictEqual(doublesOut, {
     __proto__: null,
     OU: [ 'Domain Control Validated', 'PositiveSSL Wildcard' ],
@@ -46,7 +46,7 @@ hijackStderr(noOutput);
 
 {
   const invalid = 'fhqwhgads';
-  const invalidOut = internalTLS.parseCertString(invalid);
+  const invalidOut = parseCertString(invalid);
   assert.deepStrictEqual(invalidOut, { __proto__: null });
 }
 
@@ -55,7 +55,7 @@ hijackStderr(noOutput);
   const expected = Object.create(null);
   expected.__proto__ = 'mostly harmless';
   expected.hasOwnProperty = 'not a function';
-  assert.deepStrictEqual(internalTLS.parseCertString(input), expected);
+  assert.deepStrictEqual(parseCertString(input), expected);
 }
 
 restoreStderr();