Add support for IP address email validation #800

validatorjs · Jun 15, 2018 · 1676c33 · 1676c33
1 parent 4d0c0d4
commit 1676c33
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Showing 5 changed files with 111 additions and 72 deletions.
diff --git a/lib/isEmail.js b/lib/isEmail.js
@@ -21,6 +21,10 @@ var _isFQDN = require('./isFQDN');
 
 var _isFQDN2 = _interopRequireDefault(_isFQDN);
 
+var _isIP = require('./isIP');
+
+var _isIP2 = _interopRequireDefault(_isIP);
+
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
 var default_email_options = {
@@ -91,7 +95,17 @@ function isEmail(str, options) {
   }
 
   if (!(0, _isFQDN2.default)(domain, { require_tld: options.require_tld })) {
-    return false;
+    if (!(0, _isIP2.default)(domain)) {
+      if (!domain.startsWith('[') || !domain.endsWith(']')) {
+        return false;
+      }
+
+      var noBracketdomain = domain.substr(1, domain.length - 2);
+
+      if (noBracketdomain.length === 0 || !(0, _isIP2.default)(noBracketdomain)) {
+        return false;
+      }
+    }
   }
 
   if (user[0] === '"') {

diff --git a/src/lib/isEmail.js b/src/lib/isEmail.js
@@ -3,6 +3,7 @@ import assertString from './util/assertString';
 import merge from './util/merge';
 import isByteLength from './isByteLength';
 import isFQDN from './isFQDN';
+import isIP from './isIP';
 
 const default_email_options = {
   allow_display_name: false,
@@ -73,7 +74,17 @@ export default function isEmail(str, options) {
   }
 
   if (!isFQDN(domain, { require_tld: options.require_tld })) {
-    return false;
+    if (!isIP(domain)) {
+      if (!domain.startsWith('[') || !domain.endsWith(']')) {
+        return false;
+      }
+
+      let noBracketdomain = domain.substr(1, domain.length - 2);
+
+      if (noBracketdomain.length === 0 || !isIP(noBracketdomain)) {
+        return false;
+      }
+    }
   }
 
   if (user[0] === '"') {

diff --git a/test/validators.js b/test/validators.js
@@ -64,6 +64,8 @@ describe('Validators', () => {
         `${repeat('a', 64)}@${repeat('a', 63)}.com`,
         `${repeat('a', 64)}@${repeat('a', 63)}.${repeat('a', 63)}.${repeat('a', 63)}.${repeat('a', 58)}.com`,
         `${repeat('a', 64)}@${repeat('a', 63)}.com`,
+        'email@[123.123.123.123]',
+        '[email protected]',
       ],
       invalid: [
         'invalidemail@',
@@ -98,6 +100,8 @@ describe('Validators', () => {
         '[email protected]',
         '[email protected]',
         'test123+invalid! [email protected]',
+        '[email protected]',
+        '[email protected]',
       ],
     });
   });

diff --git a/validator.js b/validator.js
@@ -173,6 +173,74 @@ function isFQDN(str, options) {
   return true;
 }
 
+var ipv4Maybe = /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
+var ipv6Block = /^[0-9A-F]{1,4}$/i;
+
+function isIP(str) {
+  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
+
+  assertString(str);
+  version = String(version);
+  if (!version) {
+    return isIP(str, 4) || isIP(str, 6);
+  } else if (version === '4') {
+    if (!ipv4Maybe.test(str)) {
+      return false;
+    }
+    var parts = str.split('.').sort(function (a, b) {
+      return a - b;
+    });
+    return parts[3] <= 255;
+  } else if (version === '6') {
+    var blocks = str.split(':');
+    var foundOmissionBlock = false; // marker to indicate ::
+
+    // At least some OS accept the last 32 bits of an IPv6 address
+    // (i.e. 2 of the blocks) in IPv4 notation, and RFC 3493 says
+    // that '::ffff:a.b.c.d' is valid for IPv4-mapped IPv6 addresses,
+    // and '::a.b.c.d' is deprecated, but also valid.
+    var foundIPv4TransitionBlock = isIP(blocks[blocks.length - 1], 4);
+    var expectedNumberOfBlocks = foundIPv4TransitionBlock ? 7 : 8;
+
+    if (blocks.length > expectedNumberOfBlocks) {
+      return false;
+    }
+    // initial or final ::
+    if (str === '::') {
+      return true;
+    } else if (str.substr(0, 2) === '::') {
+      blocks.shift();
+      blocks.shift();
+      foundOmissionBlock = true;
+    } else if (str.substr(str.length - 2) === '::') {
+      blocks.pop();
+      blocks.pop();
+      foundOmissionBlock = true;
+    }
+
+    for (var i = 0; i < blocks.length; ++i) {
+      // test for a :: which can not be at the string start/end
+      // since those cases have been handled above
+      if (blocks[i] === '' && i > 0 && i < blocks.length - 1) {
+        if (foundOmissionBlock) {
+          return false; // multiple :: in address
+        }
+        foundOmissionBlock = true;
+      } else if (foundIPv4TransitionBlock && i === blocks.length - 1) {
+        // it has been checked before that the last
+        // block is a valid IPv4 address
+      } else if (!ipv6Block.test(blocks[i])) {
+        return false;
+      }
+    }
+    if (foundOmissionBlock) {
+      return blocks.length >= 1;
+    }
+    return blocks.length === expectedNumberOfBlocks;
+  }
+  return false;
+}
+
 var default_email_options = {
   allow_display_name: false,
   require_display_name: false,
@@ -241,7 +309,17 @@ function isEmail(str, options) {
   }
 
   if (!isFQDN(domain, { require_tld: options.require_tld })) {
-    return false;
+    if (!isIP(domain)) {
+      if (!domain.startsWith('[') || !domain.endsWith(']')) {
+        return false;
+      }
+
+      var noBracketdomain = domain.substr(1, domain.length - 2);
+
+      if (noBracketdomain.length === 0 || !isIP(noBracketdomain)) {
+        return false;
+      }
+    }
   }
 
   if (user[0] === '"') {
@@ -261,74 +339,6 @@ function isEmail(str, options) {
   return true;
 }
 
-var ipv4Maybe = /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
-var ipv6Block = /^[0-9A-F]{1,4}$/i;
-
-function isIP(str) {
-  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
-
-  assertString(str);
-  version = String(version);
-  if (!version) {
-    return isIP(str, 4) || isIP(str, 6);
-  } else if (version === '4') {
-    if (!ipv4Maybe.test(str)) {
-      return false;
-    }
-    var parts = str.split('.').sort(function (a, b) {
-      return a - b;
-    });
-    return parts[3] <= 255;
-  } else if (version === '6') {
-    var blocks = str.split(':');
-    var foundOmissionBlock = false; // marker to indicate ::
-
-    // At least some OS accept the last 32 bits of an IPv6 address
-    // (i.e. 2 of the blocks) in IPv4 notation, and RFC 3493 says
-    // that '::ffff:a.b.c.d' is valid for IPv4-mapped IPv6 addresses,
-    // and '::a.b.c.d' is deprecated, but also valid.
-    var foundIPv4TransitionBlock = isIP(blocks[blocks.length - 1], 4);
-    var expectedNumberOfBlocks = foundIPv4TransitionBlock ? 7 : 8;
-
-    if (blocks.length > expectedNumberOfBlocks) {
-      return false;
-    }
-    // initial or final ::
-    if (str === '::') {
-      return true;
-    } else if (str.substr(0, 2) === '::') {
-      blocks.shift();
-      blocks.shift();
-      foundOmissionBlock = true;
-    } else if (str.substr(str.length - 2) === '::') {
-      blocks.pop();
-      blocks.pop();
-      foundOmissionBlock = true;
-    }
-
-    for (var i = 0; i < blocks.length; ++i) {
-      // test for a :: which can not be at the string start/end
-      // since those cases have been handled above
-      if (blocks[i] === '' && i > 0 && i < blocks.length - 1) {
-        if (foundOmissionBlock) {
-          return false; // multiple :: in address
-        }
-        foundOmissionBlock = true;
-      } else if (foundIPv4TransitionBlock && i === blocks.length - 1) {
-        // it has been checked before that the last
-        // block is a valid IPv4 address
-      } else if (!ipv6Block.test(blocks[i])) {
-        return false;
-      }
-    }
-    if (foundOmissionBlock) {
-      return blocks.length >= 1;
-    }
-    return blocks.length === expectedNumberOfBlocks;
-  }
-  return false;
-}
-
 var default_url_options = {
   protocols: ['http', 'https', 'ftp'],
   require_tld: true,

diff --git a/validator.min.js b/validator.min.js