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'use strict'; |
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// Load modules |
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5
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const Punycode = require('punycode'); |
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7
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// Declare internals |
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const internals = { |
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hasOwn: Object.prototype.hasOwnProperty, |
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indexOf: Array.prototype.indexOf, |
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defaultThreshold: 16, |
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maxIPv6Groups: 8, |
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categories: { |
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valid: 1, |
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dnsWarn: 7, |
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rfc5321: 15, |
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cfws: 31, |
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deprecated: 63, |
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rfc5322: 127, |
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error: 255 |
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}, |
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diagnoses: { |
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// Address is valid |
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valid: 0, |
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// Address is valid for SMTP but has unusual elements |
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33
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rfc5321TLD: 9, |
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rfc5321TLDNumeric: 10, |
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rfc5321QuotedString: 11, |
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rfc5321AddressLiteral: 12, |
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// Address is valid for message, but must be modified for envelope |
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cfwsComment: 17, |
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cfwsFWS: 18, |
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// Address contains deprecated elements, but may still be valid in some contexts |
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deprecatedLocalPart: 33, |
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deprecatedFWS: 34, |
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deprecatedQTEXT: 35, |
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deprecatedQP: 36, |
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deprecatedComment: 37, |
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deprecatedCTEXT: 38, |
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51
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deprecatedIPv6: 39, |
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deprecatedCFWSNearAt: 49, |
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// Address is only valid according to broad definition in RFC 5322, but is otherwise invalid |
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56
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rfc5322Domain: 65, |
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rfc5322TooLong: 66, |
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rfc5322LocalTooLong: 67, |
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rfc5322DomainTooLong: 68, |
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rfc5322LabelTooLong: 69, |
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rfc5322DomainLiteral: 70, |
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rfc5322DomainLiteralOBSDText: 71, |
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rfc5322IPv6GroupCount: 72, |
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rfc5322IPv62x2xColon: 73, |
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rfc5322IPv6BadCharacter: 74, |
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rfc5322IPv6MaxGroups: 75, |
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rfc5322IPv6ColonStart: 76, |
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rfc5322IPv6ColonEnd: 77, |
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// Address is invalid for any purpose |
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72
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errExpectingDTEXT: 129, |
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errNoLocalPart: 130, |
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errNoDomain: 131, |
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errConsecutiveDots: 132, |
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errATEXTAfterCFWS: 133, |
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errATEXTAfterQS: 134, |
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errATEXTAfterDomainLiteral: 135, |
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errExpectingQPair: 136, |
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errExpectingATEXT: 137, |
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errExpectingQTEXT: 138, |
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errExpectingCTEXT: 139, |
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errBackslashEnd: 140, |
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errDotStart: 141, |
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errDotEnd: 142, |
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errDomainHyphenStart: 143, |
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errDomainHyphenEnd: 144, |
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errUnclosedQuotedString: 145, |
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errUnclosedComment: 146, |
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errUnclosedDomainLiteral: 147, |
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errFWSCRLFx2: 148, |
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errFWSCRLFEnd: 149, |
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errCRNoLF: 150, |
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errUnknownTLD: 160, |
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errDomainTooShort: 161 |
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}, |
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components: { |
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localpart: 0, |
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domain: 1, |
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literal: 2, |
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contextComment: 3, |
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contextFWS: 4, |
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contextQuotedString: 5, |
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contextQuotedPair: 6 |
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} |
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}; |
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internals.specials = function () { |
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const specials = '()<>[]:;@\\,."'; // US-ASCII visible characters not valid for atext (http://tools.ietf.org/html/rfc5322#section-3.2.3) |
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const lookup = new Array(0x100); |
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lookup.fill(false); |
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for (let i = 0; i < specials.length; ++i) { |
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lookup[specials.codePointAt(i)] = true; |
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} |
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return function (code) { |
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return lookup[code]; |
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}; |
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}(); |
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internals.c0Controls = function () { |
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const lookup = new Array(0x100); |
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lookup.fill(false); |
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// add C0 control characters |
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for (let i = 0; i < 33; ++i) { |
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lookup[i] = true; |
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} |
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return function (code) { |
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return lookup[code]; |
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}; |
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}(); |
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internals.c1Controls = function () { |
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const lookup = new Array(0x100); |
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lookup.fill(false); |
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148
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// add C1 control characters |
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for (let i = 127; i < 160; ++i) { |
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lookup[i] = true; |
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} |
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return function (code) { |
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return lookup[code]; |
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}; |
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}(); |
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internals.regex = { |
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ipV4: /\b(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$/, |
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ipV6: /^[a-fA-F\d]{0,4}$/ |
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}; |
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// $lab:coverage:off$ |
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internals.nulNormalize = function (email) { |
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let emailPieces = email.split('\u0000'); |
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emailPieces = emailPieces.map((string) => { |
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return string.normalize('NFC'); |
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}); |
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return emailPieces.join('\u0000'); |
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}; |
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// $lab:coverage:on$ |
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internals.checkIpV6 = function (items) { |
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return items.every((value) => internals.regex.ipV6.test(value)); |
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}; |
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internals.validDomain = function (tldAtom, options) { |
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if (options.tldBlacklist) { |
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if (Array.isArray(options.tldBlacklist)) { |
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return internals.indexOf.call(options.tldBlacklist, tldAtom) === -1; |
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} |
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return !internals.hasOwn.call(options.tldBlacklist, tldAtom); |
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} |
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if (Array.isArray(options.tldWhitelist)) { |
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return internals.indexOf.call(options.tldWhitelist, tldAtom) !== -1; |
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} |
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return internals.hasOwn.call(options.tldWhitelist, tldAtom); |
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}; |
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/** |
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* Check that an email address conforms to RFCs 5321, 5322, 6530 and others |
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* |
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* We distinguish clearly between a Mailbox as defined by RFC 5321 and an |
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* addr-spec as defined by RFC 5322. Depending on the context, either can be |
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* regarded as a valid email address. The RFC 5321 Mailbox specification is |
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* more restrictive (comments, white space and obsolete forms are not allowed). |
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* |
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* @param {string} email The email address to check. See README for specifics. |
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* @param {Object} options The (optional) options: |
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* {*} errorLevel Determines the boundary between valid and invalid |
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* addresses. |
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* {*} tldBlacklist The set of domains to consider invalid. |
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* {*} tldWhitelist The set of domains to consider valid. |
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* {*} minDomainAtoms The minimum number of domain atoms which must be present |
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* for the address to be valid. |
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* @param {function(number|boolean)} callback The (optional) callback handler. |
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* @return {*} |
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*/ |
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exports.validate = internals.validate = function (email, options, callback) { |
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options = options || {}; |
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email = internals.normalize(email); |
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if (typeof options === 'function') { |
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callback = options; |
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options = {}; |
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} |
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if (typeof callback !== 'function') { |
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callback = null; |
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} |
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let diagnose; |
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let threshold; |
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if (typeof options.errorLevel === 'number') { |
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diagnose = true; |
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threshold = options.errorLevel; |
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} |
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else { |
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diagnose = !!options.errorLevel; |
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threshold = internals.diagnoses.valid; |
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} |
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248
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249
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if (options.tldWhitelist) { |
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250
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if (typeof options.tldWhitelist === 'string') { |
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options.tldWhitelist = [options.tldWhitelist]; |
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} |
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253
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else if (typeof options.tldWhitelist !== 'object') { |
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throw new TypeError('expected array or object tldWhitelist'); |
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} |
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256
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} |
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257
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258
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if (options.tldBlacklist) { |
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if (typeof options.tldBlacklist === 'string') { |
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options.tldBlacklist = [options.tldBlacklist]; |
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} |
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else if (typeof options.tldBlacklist !== 'object') { |
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throw new TypeError('expected array or object tldBlacklist'); |
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} |
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265
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} |
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267
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if (options.minDomainAtoms && (options.minDomainAtoms !== ((+options.minDomainAtoms) | 0) || options.minDomainAtoms < 0)) { |
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throw new TypeError('expected positive integer minDomainAtoms'); |
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} |
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270
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271
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let maxResult = internals.diagnoses.valid; |
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272
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const updateResult = (value) => { |
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274
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if (value > maxResult) { |
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maxResult = value; |
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} |
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277
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}; |
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278
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279
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const context = { |
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280
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now: internals.components.localpart, |
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281
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prev: internals.components.localpart, |
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stack: [internals.components.localpart] |
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283
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}; |
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284
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285
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let prevToken = ''; |
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286
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287
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const parseData = { |
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288
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local: '', |
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289
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domain: '' |
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290
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}; |
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291
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const atomData = { |
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292
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locals: [''], |
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293
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domains: [''] |
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294
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}; |
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295
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296
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let elementCount = 0; |
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297
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let elementLength = 0; |
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298
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let crlfCount = 0; |
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299
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let charCode; |
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300
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301
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let hyphenFlag = false; |
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302
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let assertEnd = false; |
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303
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304
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const emailLength = email.length; |
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305
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306
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let token; // Token is used outside the loop, must declare similarly |
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307
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for (let i = 0; i < emailLength; i += token.length) { |
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308
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// Utilize codepoints to account for Unicode surrogate pairs |
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309
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token = String.fromCodePoint(email.codePointAt(i)); |
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310
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311
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switch (context.now) { |
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312
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// Local-part |
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313
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case internals.components.localpart: |
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314
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// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
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315
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// local-part = dot-atom / quoted-string / obs-local-part |
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316
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// |
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317
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// dot-atom = [CFWS] dot-atom-text [CFWS] |
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318
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// |
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319
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// dot-atom-text = 1*atext *("." 1*atext) |
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320
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// |
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321
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// quoted-string = [CFWS] |
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322
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// DQUOTE *([FWS] qcontent) [FWS] DQUOTE |
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323
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// [CFWS] |
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324
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// |
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325
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// obs-local-part = word *("." word) |
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326
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// |
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327
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// word = atom / quoted-string |
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328
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// |
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329
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// atom = [CFWS] 1*atext [CFWS] |
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330
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switch (token) { |
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331
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// Comment |
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332
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case '(': |
|
333
|
|
|
if (elementLength === 0) { |
|
334
|
|
|
// Comments are OK at the beginning of an element |
|
335
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.cfwsComment : internals.diagnoses.deprecatedComment); |
|
336
|
|
|
} |
|
337
|
|
|
else { |
|
338
|
|
|
updateResult(internals.diagnoses.cfwsComment); |
|
339
|
|
|
// Cannot start a comment in an element, should be end |
|
340
|
|
|
assertEnd = true; |
|
341
|
|
|
} |
|
342
|
|
|
|
|
343
|
|
|
context.stack.push(context.now); |
|
344
|
|
|
context.now = internals.components.contextComment; |
|
345
|
|
|
break; |
|
346
|
|
|
|
|
347
|
|
|
// Next dot-atom element |
|
348
|
|
|
case '.': |
|
349
|
|
|
if (elementLength === 0) { |
|
350
|
|
|
// Another dot, already? |
|
351
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.errDotStart : internals.diagnoses.errConsecutiveDots); |
|
352
|
|
|
} |
|
353
|
|
|
else { |
|
354
|
|
|
// The entire local-part can be a quoted string for RFC 5321; if one atom is quoted it's an RFC 5322 obsolete form |
|
355
|
|
|
if (assertEnd) { |
|
356
|
|
|
updateResult(internals.diagnoses.deprecatedLocalPart); |
|
357
|
|
|
} |
|
358
|
|
|
|
|
359
|
|
|
// CFWS & quoted strings are OK again now we're at the beginning of an element (although they are obsolete forms) |
|
360
|
|
|
assertEnd = false; |
|
361
|
|
|
elementLength = 0; |
|
362
|
|
|
++elementCount; |
|
363
|
|
|
parseData.local += token; |
|
364
|
|
|
atomData.locals[elementCount] = ''; |
|
365
|
|
|
} |
|
366
|
|
|
|
|
367
|
|
|
break; |
|
368
|
|
|
|
|
369
|
|
|
// Quoted string |
|
370
|
|
|
case '"': |
|
371
|
|
|
if (elementLength === 0) { |
|
372
|
|
|
// The entire local-part can be a quoted string for RFC 5321; if one atom is quoted it's an RFC 5322 obsolete form |
|
373
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.rfc5321QuotedString : internals.diagnoses.deprecatedLocalPart); |
|
374
|
|
|
|
|
375
|
|
|
parseData.local += token; |
|
376
|
|
|
atomData.locals[elementCount] += token; |
|
377
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
378
|
|
|
|
|
379
|
|
|
// Quoted string must be the entire element |
|
380
|
|
|
assertEnd = true; |
|
381
|
|
|
context.stack.push(context.now); |
|
382
|
|
|
context.now = internals.components.contextQuotedString; |
|
383
|
|
|
} |
|
384
|
|
|
else { |
|
385
|
|
|
updateResult(internals.diagnoses.errExpectingATEXT); |
|
386
|
|
|
} |
|
387
|
|
|
|
|
388
|
|
|
break; |
|
389
|
|
|
|
|
390
|
|
|
// Folding white space |
|
391
|
|
|
case '\r': |
|
392
|
|
|
if (emailLength === ++i || email[i] !== '\n') { |
|
393
|
|
|
// Fatal error |
|
394
|
|
|
updateResult(internals.diagnoses.errCRNoLF); |
|
395
|
|
|
break; |
|
396
|
|
|
} |
|
397
|
|
|
|
|
398
|
|
|
// Fallthrough |
|
399
|
|
|
|
|
400
|
|
|
case ' ': |
|
401
|
|
|
case '\t': |
|
402
|
|
|
if (elementLength === 0) { |
|
403
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.cfwsFWS : internals.diagnoses.deprecatedFWS); |
|
404
|
|
|
} |
|
405
|
|
|
else { |
|
406
|
|
|
// We can't start FWS in the middle of an element, better be end |
|
407
|
|
|
assertEnd = true; |
|
408
|
|
|
} |
|
409
|
|
|
|
|
410
|
|
|
context.stack.push(context.now); |
|
411
|
|
|
context.now = internals.components.contextFWS; |
|
412
|
|
|
prevToken = token; |
|
413
|
|
|
break; |
|
414
|
|
|
|
|
415
|
|
|
case '@': |
|
416
|
|
|
// At this point we should have a valid local-part |
|
417
|
|
|
// $lab:coverage:off$ |
|
418
|
|
|
if (context.stack.length !== 1) { |
|
419
|
|
|
throw new Error('unexpected item on context stack'); |
|
420
|
|
|
} |
|
421
|
|
|
// $lab:coverage:on$ |
|
422
|
|
|
|
|
423
|
|
|
if (parseData.local.length === 0) { |
|
424
|
|
|
// Fatal error |
|
425
|
|
|
updateResult(internals.diagnoses.errNoLocalPart); |
|
426
|
|
|
} |
|
427
|
|
|
else if (elementLength === 0) { |
|
428
|
|
|
// Fatal error |
|
429
|
|
|
updateResult(internals.diagnoses.errDotEnd); |
|
430
|
|
|
} |
|
431
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1 the maximum total length of a user name or other local-part is 64 |
|
432
|
|
|
// octets |
|
433
|
|
|
else if (Buffer.byteLength(parseData.local, 'utf8') > 64) { |
|
434
|
|
|
updateResult(internals.diagnoses.rfc5322LocalTooLong); |
|
435
|
|
|
} |
|
436
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 comments and folding white space SHOULD NOT be used around "@" in the |
|
437
|
|
|
// addr-spec |
|
438
|
|
|
// |
|
439
|
|
|
// http://tools.ietf.org/html/rfc2119 |
|
440
|
|
|
// 4. SHOULD NOT this phrase, or the phrase "NOT RECOMMENDED" mean that there may exist valid reasons in particular |
|
441
|
|
|
// circumstances when the particular behavior is acceptable or even useful, but the full implications should be understood |
|
442
|
|
|
// and the case carefully weighed before implementing any behavior described with this label. |
|
443
|
|
|
else if (context.prev === internals.components.contextComment || context.prev === internals.components.contextFWS) { |
|
444
|
|
|
updateResult(internals.diagnoses.deprecatedCFWSNearAt); |
|
445
|
|
|
} |
|
446
|
|
|
|
|
447
|
|
|
// Clear everything down for the domain parsing |
|
448
|
|
|
context.now = internals.components.domain; |
|
449
|
|
|
context.stack[0] = internals.components.domain; |
|
450
|
|
|
elementCount = 0; |
|
451
|
|
|
elementLength = 0; |
|
452
|
|
|
assertEnd = false; // CFWS can only appear at the end of the element |
|
453
|
|
|
break; |
|
454
|
|
|
|
|
455
|
|
|
// ATEXT |
|
456
|
|
|
default: |
|
457
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.3 |
|
458
|
|
|
// atext = ALPHA / DIGIT / ; Printable US-ASCII |
|
459
|
|
|
// "!" / "#" / ; characters not including |
|
460
|
|
|
// "$" / "%" / ; specials. Used for atoms. |
|
461
|
|
|
// "&" / "'" / |
|
462
|
|
|
// "*" / "+" / |
|
463
|
|
|
// "-" / "/" / |
|
464
|
|
|
// "=" / "?" / |
|
465
|
|
|
// "^" / "_" / |
|
466
|
|
|
// "`" / "{" / |
|
467
|
|
|
// "|" / "}" / |
|
468
|
|
|
// "~" |
|
469
|
|
|
if (assertEnd) { |
|
470
|
|
|
// We have encountered atext where it is no longer valid |
|
471
|
|
|
switch (context.prev) { |
|
472
|
|
|
case internals.components.contextComment: |
|
473
|
|
|
case internals.components.contextFWS: |
|
474
|
|
|
updateResult(internals.diagnoses.errATEXTAfterCFWS); |
|
475
|
|
|
break; |
|
476
|
|
|
|
|
477
|
|
|
case internals.components.contextQuotedString: |
|
478
|
|
|
updateResult(internals.diagnoses.errATEXTAfterQS); |
|
479
|
|
|
break; |
|
480
|
|
|
|
|
481
|
|
|
// $lab:coverage:off$ |
|
482
|
|
|
default: |
|
483
|
|
|
throw new Error('more atext found where none is allowed, but unrecognized prev context: ' + context.prev); |
|
484
|
|
|
// $lab:coverage:on$ |
|
485
|
|
|
} |
|
486
|
|
|
} |
|
487
|
|
|
else { |
|
488
|
|
|
context.prev = context.now; |
|
489
|
|
|
charCode = token.codePointAt(0); |
|
490
|
|
|
|
|
491
|
|
|
// Especially if charCode == 10 |
|
492
|
|
|
if (internals.specials(charCode) || internals.c0Controls(charCode) || internals.c1Controls(charCode)) { |
|
493
|
|
|
|
|
494
|
|
|
// Fatal error |
|
495
|
|
|
updateResult(internals.diagnoses.errExpectingATEXT); |
|
496
|
|
|
} |
|
497
|
|
|
|
|
498
|
|
|
parseData.local += token; |
|
499
|
|
|
atomData.locals[elementCount] += token; |
|
500
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
501
|
|
|
} |
|
502
|
|
|
} |
|
503
|
|
|
|
|
504
|
|
|
break; |
|
505
|
|
|
|
|
506
|
|
|
case internals.components.domain: |
|
507
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
|
508
|
|
|
// domain = dot-atom / domain-literal / obs-domain |
|
509
|
|
|
// |
|
510
|
|
|
// dot-atom = [CFWS] dot-atom-text [CFWS] |
|
511
|
|
|
// |
|
512
|
|
|
// dot-atom-text = 1*atext *("." 1*atext) |
|
513
|
|
|
// |
|
514
|
|
|
// domain-literal = [CFWS] "[" *([FWS] dtext) [FWS] "]" [CFWS] |
|
515
|
|
|
// |
|
516
|
|
|
// dtext = %d33-90 / ; Printable US-ASCII |
|
517
|
|
|
// %d94-126 / ; characters not including |
|
518
|
|
|
// obs-dtext ; "[", "]", or "\" |
|
519
|
|
|
// |
|
520
|
|
|
// obs-domain = atom *("." atom) |
|
521
|
|
|
// |
|
522
|
|
|
// atom = [CFWS] 1*atext [CFWS] |
|
523
|
|
|
|
|
524
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.1.2 |
|
525
|
|
|
// Mailbox = Local-part "@" ( Domain / address-literal ) |
|
526
|
|
|
// |
|
527
|
|
|
// Domain = sub-domain *("." sub-domain) |
|
528
|
|
|
// |
|
529
|
|
|
// address-literal = "[" ( IPv4-address-literal / |
|
530
|
|
|
// IPv6-address-literal / |
|
531
|
|
|
// General-address-literal ) "]" |
|
532
|
|
|
// ; See Section 4.1.3 |
|
533
|
|
|
|
|
534
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
|
535
|
|
|
// Note: A liberal syntax for the domain portion of addr-spec is |
|
536
|
|
|
// given here. However, the domain portion contains addressing |
|
537
|
|
|
// information specified by and used in other protocols (e.g., |
|
538
|
|
|
// [RFC1034], [RFC1035], [RFC1123], [RFC5321]). It is therefore |
|
539
|
|
|
// incumbent upon implementations to conform to the syntax of |
|
540
|
|
|
// addresses for the context in which they are used. |
|
541
|
|
|
// |
|
542
|
|
|
// is_email() author's note: it's not clear how to interpret this in |
|
543
|
|
|
// he context of a general email address validator. The conclusion I |
|
544
|
|
|
// have reached is this: "addressing information" must comply with |
|
545
|
|
|
// RFC 5321 (and in turn RFC 1035), anything that is "semantically |
|
546
|
|
|
// invisible" must comply only with RFC 5322. |
|
547
|
|
|
switch (token) { |
|
548
|
|
|
// Comment |
|
549
|
|
|
case '(': |
|
550
|
|
|
if (elementLength === 0) { |
|
551
|
|
|
// Comments at the start of the domain are deprecated in the text, comments at the start of a subdomain are obs-domain |
|
552
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
|
553
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.deprecatedCFWSNearAt : internals.diagnoses.deprecatedComment); |
|
554
|
|
|
} |
|
555
|
|
|
else { |
|
556
|
|
|
// We can't start a comment mid-element, better be at the end |
|
557
|
|
|
assertEnd = true; |
|
558
|
|
|
updateResult(internals.diagnoses.cfwsComment); |
|
559
|
|
|
} |
|
560
|
|
|
|
|
561
|
|
|
context.stack.push(context.now); |
|
562
|
|
|
context.now = internals.components.contextComment; |
|
563
|
|
|
break; |
|
564
|
|
|
|
|
565
|
|
|
// Next dot-atom element |
|
566
|
|
|
case '.': |
|
567
|
|
|
const punycodeLength = Punycode.encode(atomData.domains[elementCount]).length; |
|
568
|
|
|
if (elementLength === 0) { |
|
569
|
|
|
// Another dot, already? Fatal error. |
|
570
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.errDotStart : internals.diagnoses.errConsecutiveDots); |
|
571
|
|
|
} |
|
572
|
|
|
else if (hyphenFlag) { |
|
573
|
|
|
// Previous subdomain ended in a hyphen. Fatal error. |
|
574
|
|
|
updateResult(internals.diagnoses.errDomainHyphenEnd); |
|
575
|
|
|
} |
|
576
|
|
|
else if (punycodeLength > 63) { |
|
577
|
|
|
// RFC 5890 specifies that domain labels that are encoded using the Punycode algorithm |
|
578
|
|
|
// must adhere to the <= 63 octet requirement. |
|
579
|
|
|
// This includes string prefixes from the Punycode algorithm. |
|
580
|
|
|
// |
|
581
|
|
|
// https://tools.ietf.org/html/rfc5890#section-2.3.2.1 |
|
582
|
|
|
// labels 63 octets or less |
|
583
|
|
|
|
|
584
|
|
|
updateResult(internals.diagnoses.rfc5322LabelTooLong); |
|
585
|
|
|
} |
|
586
|
|
|
|
|
587
|
|
|
// CFWS is OK again now we're at the beginning of an element (although |
|
588
|
|
|
// it may be obsolete CFWS) |
|
589
|
|
|
assertEnd = false; |
|
590
|
|
|
elementLength = 0; |
|
591
|
|
|
++elementCount; |
|
592
|
|
|
atomData.domains[elementCount] = ''; |
|
593
|
|
|
parseData.domain += token; |
|
594
|
|
|
|
|
595
|
|
|
break; |
|
596
|
|
|
|
|
597
|
|
|
// Domain literal |
|
598
|
|
|
case '[': |
|
599
|
|
|
if (parseData.domain.length === 0) { |
|
600
|
|
|
// Domain literal must be the only component |
|
601
|
|
|
assertEnd = true; |
|
602
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
603
|
|
|
context.stack.push(context.now); |
|
604
|
|
|
context.now = internals.components.literal; |
|
605
|
|
|
parseData.domain += token; |
|
606
|
|
|
atomData.domains[elementCount] += token; |
|
607
|
|
|
parseData.literal = ''; |
|
608
|
|
|
} |
|
609
|
|
|
else { |
|
610
|
|
|
// Fatal error |
|
611
|
|
|
updateResult(internals.diagnoses.errExpectingATEXT); |
|
612
|
|
|
} |
|
613
|
|
|
|
|
614
|
|
|
break; |
|
615
|
|
|
|
|
616
|
|
|
// Folding white space |
|
617
|
|
|
case '\r': |
|
618
|
|
|
if (emailLength === ++i || email[i] !== '\n') { |
|
619
|
|
|
// Fatal error |
|
620
|
|
|
updateResult(internals.diagnoses.errCRNoLF); |
|
621
|
|
|
break; |
|
622
|
|
|
} |
|
623
|
|
|
|
|
624
|
|
|
// Fallthrough |
|
625
|
|
|
|
|
626
|
|
|
case ' ': |
|
627
|
|
|
case '\t': |
|
628
|
|
|
if (elementLength === 0) { |
|
629
|
|
|
updateResult(elementCount === 0 ? internals.diagnoses.deprecatedCFWSNearAt : internals.diagnoses.deprecatedFWS); |
|
630
|
|
|
} |
|
631
|
|
|
else { |
|
632
|
|
|
// We can't start FWS in the middle of an element, so this better be the end |
|
633
|
|
|
updateResult(internals.diagnoses.cfwsFWS); |
|
634
|
|
|
assertEnd = true; |
|
635
|
|
|
} |
|
636
|
|
|
|
|
637
|
|
|
context.stack.push(context.now); |
|
638
|
|
|
context.now = internals.components.contextFWS; |
|
639
|
|
|
prevToken = token; |
|
640
|
|
|
break; |
|
641
|
|
|
|
|
642
|
|
|
// This must be ATEXT |
|
643
|
|
|
default: |
|
644
|
|
|
// RFC 5322 allows any atext... |
|
645
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.3 |
|
646
|
|
|
// atext = ALPHA / DIGIT / ; Printable US-ASCII |
|
647
|
|
|
// "!" / "#" / ; characters not including |
|
648
|
|
|
// "$" / "%" / ; specials. Used for atoms. |
|
649
|
|
|
// "&" / "'" / |
|
650
|
|
|
// "*" / "+" / |
|
651
|
|
|
// "-" / "/" / |
|
652
|
|
|
// "=" / "?" / |
|
653
|
|
|
// "^" / "_" / |
|
654
|
|
|
// "`" / "{" / |
|
655
|
|
|
// "|" / "}" / |
|
656
|
|
|
// "~" |
|
657
|
|
|
|
|
658
|
|
|
// But RFC 5321 only allows letter-digit-hyphen to comply with DNS rules |
|
659
|
|
|
// (RFCs 1034 & 1123) |
|
660
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.1.2 |
|
661
|
|
|
// sub-domain = Let-dig [Ldh-str] |
|
662
|
|
|
// |
|
663
|
|
|
// Let-dig = ALPHA / DIGIT |
|
664
|
|
|
// |
|
665
|
|
|
// Ldh-str = *( ALPHA / DIGIT / "-" ) Let-dig |
|
666
|
|
|
// |
|
667
|
|
|
if (assertEnd) { |
|
668
|
|
|
// We have encountered ATEXT where it is no longer valid |
|
669
|
|
|
switch (context.prev) { |
|
670
|
|
|
case internals.components.contextComment: |
|
671
|
|
|
case internals.components.contextFWS: |
|
672
|
|
|
updateResult(internals.diagnoses.errATEXTAfterCFWS); |
|
673
|
|
|
break; |
|
674
|
|
|
|
|
675
|
|
|
case internals.components.literal: |
|
676
|
|
|
updateResult(internals.diagnoses.errATEXTAfterDomainLiteral); |
|
677
|
|
|
break; |
|
678
|
|
|
|
|
679
|
|
|
// $lab:coverage:off$ |
|
680
|
|
|
default: |
|
681
|
|
|
throw new Error('more atext found where none is allowed, but unrecognized prev context: ' + context.prev); |
|
682
|
|
|
// $lab:coverage:on$ |
|
683
|
|
|
} |
|
684
|
|
|
} |
|
685
|
|
|
|
|
686
|
|
|
charCode = token.codePointAt(0); |
|
687
|
|
|
// Assume this token isn't a hyphen unless we discover it is |
|
688
|
|
|
hyphenFlag = false; |
|
689
|
|
|
|
|
690
|
|
|
if (internals.specials(charCode) || internals.c0Controls(charCode) || internals.c1Controls(charCode)) { |
|
691
|
|
|
// Fatal error |
|
692
|
|
|
updateResult(internals.diagnoses.errExpectingATEXT); |
|
693
|
|
|
} |
|
694
|
|
|
else if (token === '-') { |
|
695
|
|
|
if (elementLength === 0) { |
|
696
|
|
|
// Hyphens cannot be at the beginning of a subdomain, fatal error |
|
697
|
|
|
updateResult(internals.diagnoses.errDomainHyphenStart); |
|
698
|
|
|
} |
|
699
|
|
|
|
|
700
|
|
|
hyphenFlag = true; |
|
701
|
|
|
} |
|
702
|
|
|
// Check if it's a neither a number nor a latin/unicode letter |
|
703
|
|
|
else if (charCode < 48 || (charCode > 122 && charCode < 192) || (charCode > 57 && charCode < 65) || (charCode > 90 && charCode < 97)) { |
|
704
|
|
|
// This is not an RFC 5321 subdomain, but still OK by RFC 5322 |
|
705
|
|
|
updateResult(internals.diagnoses.rfc5322Domain); |
|
706
|
|
|
} |
|
707
|
|
|
|
|
708
|
|
|
parseData.domain += token; |
|
709
|
|
|
atomData.domains[elementCount] += token; |
|
710
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
711
|
|
|
} |
|
712
|
|
|
|
|
713
|
|
|
break; |
|
714
|
|
|
|
|
715
|
|
|
// Domain literal |
|
716
|
|
|
case internals.components.literal: |
|
717
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
|
718
|
|
|
// domain-literal = [CFWS] "[" *([FWS] dtext) [FWS] "]" [CFWS] |
|
719
|
|
|
// |
|
720
|
|
|
// dtext = %d33-90 / ; Printable US-ASCII |
|
721
|
|
|
// %d94-126 / ; characters not including |
|
722
|
|
|
// obs-dtext ; "[", "]", or "\" |
|
723
|
|
|
// |
|
724
|
|
|
// obs-dtext = obs-NO-WS-CTL / quoted-pair |
|
725
|
|
|
switch (token) { |
|
726
|
|
|
// End of domain literal |
|
727
|
|
|
case ']': |
|
728
|
|
|
if (maxResult < internals.categories.deprecated) { |
|
729
|
|
|
// Could be a valid RFC 5321 address literal, so let's check |
|
730
|
|
|
|
|
731
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.1.2 |
|
732
|
|
|
// address-literal = "[" ( IPv4-address-literal / |
|
733
|
|
|
// IPv6-address-literal / |
|
734
|
|
|
// General-address-literal ) "]" |
|
735
|
|
|
// ; See Section 4.1.3 |
|
736
|
|
|
// |
|
737
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.1.3 |
|
738
|
|
|
// IPv4-address-literal = Snum 3("." Snum) |
|
739
|
|
|
// |
|
740
|
|
|
// IPv6-address-literal = "IPv6:" IPv6-addr |
|
741
|
|
|
// |
|
742
|
|
|
// General-address-literal = Standardized-tag ":" 1*dcontent |
|
743
|
|
|
// |
|
744
|
|
|
// Standardized-tag = Ldh-str |
|
745
|
|
|
// ; Standardized-tag MUST be specified in a |
|
746
|
|
|
// ; Standards-Track RFC and registered with IANA |
|
747
|
|
|
// |
|
748
|
|
|
// dcontent = %d33-90 / ; Printable US-ASCII |
|
749
|
|
|
// %d94-126 ; excl. "[", "\", "]" |
|
750
|
|
|
// |
|
751
|
|
|
// Snum = 1*3DIGIT |
|
752
|
|
|
// ; representing a decimal integer |
|
753
|
|
|
// ; value in the range 0 through 255 |
|
754
|
|
|
// |
|
755
|
|
|
// IPv6-addr = IPv6-full / IPv6-comp / IPv6v4-full / IPv6v4-comp |
|
756
|
|
|
// |
|
757
|
|
|
// IPv6-hex = 1*4HEXDIG |
|
758
|
|
|
// |
|
759
|
|
|
// IPv6-full = IPv6-hex 7(":" IPv6-hex) |
|
760
|
|
|
// |
|
761
|
|
|
// IPv6-comp = [IPv6-hex *5(":" IPv6-hex)] "::" |
|
762
|
|
|
// [IPv6-hex *5(":" IPv6-hex)] |
|
763
|
|
|
// ; The "::" represents at least 2 16-bit groups of |
|
764
|
|
|
// ; zeros. No more than 6 groups in addition to the |
|
765
|
|
|
// ; "::" may be present. |
|
766
|
|
|
// |
|
767
|
|
|
// IPv6v4-full = IPv6-hex 5(":" IPv6-hex) ":" IPv4-address-literal |
|
768
|
|
|
// |
|
769
|
|
|
// IPv6v4-comp = [IPv6-hex *3(":" IPv6-hex)] "::" |
|
770
|
|
|
// [IPv6-hex *3(":" IPv6-hex) ":"] |
|
771
|
|
|
// IPv4-address-literal |
|
772
|
|
|
// ; The "::" represents at least 2 16-bit groups of |
|
773
|
|
|
// ; zeros. No more than 4 groups in addition to the |
|
774
|
|
|
// ; "::" and IPv4-address-literal may be present. |
|
775
|
|
|
|
|
776
|
|
|
let index = -1; |
|
777
|
|
|
let addressLiteral = parseData.literal; |
|
778
|
|
|
const matchesIP = internals.regex.ipV4.exec(addressLiteral); |
|
779
|
|
|
|
|
780
|
|
|
// Maybe extract IPv4 part from the end of the address-literal |
|
781
|
|
|
if (matchesIP) { |
|
782
|
|
|
index = matchesIP.index; |
|
783
|
|
|
if (index !== 0) { |
|
784
|
|
|
// Convert IPv4 part to IPv6 format for futher testing |
|
785
|
|
|
addressLiteral = addressLiteral.slice(0, index) + '0:0'; |
|
786
|
|
|
} |
|
787
|
|
|
} |
|
788
|
|
|
|
|
789
|
|
|
if (index === 0) { |
|
790
|
|
|
// Nothing there except a valid IPv4 address, so... |
|
791
|
|
|
updateResult(internals.diagnoses.rfc5321AddressLiteral); |
|
792
|
|
|
} |
|
793
|
|
|
else if (addressLiteral.slice(0, 5).toLowerCase() !== 'ipv6:') { |
|
794
|
|
|
updateResult(internals.diagnoses.rfc5322DomainLiteral); |
|
795
|
|
|
} |
|
796
|
|
|
else { |
|
797
|
|
|
const match = addressLiteral.slice(5); |
|
798
|
|
|
let maxGroups = internals.maxIPv6Groups; |
|
799
|
|
|
const groups = match.split(':'); |
|
800
|
|
|
index = match.indexOf('::'); |
|
801
|
|
|
|
|
802
|
|
|
if (!~index) { |
|
803
|
|
|
// Need exactly the right number of groups |
|
804
|
|
|
if (groups.length !== maxGroups) { |
|
805
|
|
|
updateResult(internals.diagnoses.rfc5322IPv6GroupCount); |
|
806
|
|
|
} |
|
807
|
|
|
} |
|
808
|
|
|
else if (index !== match.lastIndexOf('::')) { |
|
809
|
|
|
updateResult(internals.diagnoses.rfc5322IPv62x2xColon); |
|
810
|
|
|
} |
|
811
|
|
|
else { |
|
812
|
|
|
if (index === 0 || index === match.length - 2) { |
|
813
|
|
|
// RFC 4291 allows :: at the start or end of an address with 7 other groups in addition |
|
814
|
|
|
++maxGroups; |
|
815
|
|
|
} |
|
816
|
|
|
|
|
817
|
|
|
if (groups.length > maxGroups) { |
|
818
|
|
|
updateResult(internals.diagnoses.rfc5322IPv6MaxGroups); |
|
819
|
|
|
} |
|
820
|
|
|
else if (groups.length === maxGroups) { |
|
821
|
|
|
// Eliding a single "::" |
|
822
|
|
|
updateResult(internals.diagnoses.deprecatedIPv6); |
|
823
|
|
|
} |
|
824
|
|
|
} |
|
825
|
|
|
|
|
826
|
|
|
// IPv6 testing strategy |
|
827
|
|
|
if (match[0] === ':' && match[1] !== ':') { |
|
828
|
|
|
updateResult(internals.diagnoses.rfc5322IPv6ColonStart); |
|
829
|
|
|
} |
|
830
|
|
|
else if (match[match.length - 1] === ':' && match[match.length - 2] !== ':') { |
|
831
|
|
|
updateResult(internals.diagnoses.rfc5322IPv6ColonEnd); |
|
832
|
|
|
} |
|
833
|
|
|
else if (internals.checkIpV6(groups)) { |
|
834
|
|
|
updateResult(internals.diagnoses.rfc5321AddressLiteral); |
|
835
|
|
|
} |
|
836
|
|
|
else { |
|
837
|
|
|
updateResult(internals.diagnoses.rfc5322IPv6BadCharacter); |
|
838
|
|
|
} |
|
839
|
|
|
} |
|
840
|
|
|
} |
|
841
|
|
|
else { |
|
842
|
|
|
updateResult(internals.diagnoses.rfc5322DomainLiteral); |
|
843
|
|
|
} |
|
844
|
|
|
|
|
845
|
|
|
parseData.domain += token; |
|
846
|
|
|
atomData.domains[elementCount] += token; |
|
847
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
848
|
|
|
context.prev = context.now; |
|
849
|
|
|
context.now = context.stack.pop(); |
|
850
|
|
|
break; |
|
851
|
|
|
|
|
852
|
|
|
case '\\': |
|
853
|
|
|
updateResult(internals.diagnoses.rfc5322DomainLiteralOBSDText); |
|
854
|
|
|
context.stack.push(context.now); |
|
855
|
|
|
context.now = internals.components.contextQuotedPair; |
|
856
|
|
|
break; |
|
857
|
|
|
|
|
858
|
|
|
// Folding white space |
|
859
|
|
|
case '\r': |
|
860
|
|
|
if (emailLength === ++i || email[i] !== '\n') { |
|
861
|
|
|
updateResult(internals.diagnoses.errCRNoLF); |
|
862
|
|
|
break; |
|
863
|
|
|
} |
|
864
|
|
|
|
|
865
|
|
|
// Fallthrough |
|
866
|
|
|
|
|
867
|
|
|
case ' ': |
|
868
|
|
|
case '\t': |
|
869
|
|
|
updateResult(internals.diagnoses.cfwsFWS); |
|
870
|
|
|
|
|
871
|
|
|
context.stack.push(context.now); |
|
872
|
|
|
context.now = internals.components.contextFWS; |
|
873
|
|
|
prevToken = token; |
|
874
|
|
|
break; |
|
875
|
|
|
|
|
876
|
|
|
// DTEXT |
|
877
|
|
|
default: |
|
878
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
|
879
|
|
|
// dtext = %d33-90 / ; Printable US-ASCII |
|
880
|
|
|
// %d94-126 / ; characters not including |
|
881
|
|
|
// obs-dtext ; "[", "]", or "\" |
|
882
|
|
|
// |
|
883
|
|
|
// obs-dtext = obs-NO-WS-CTL / quoted-pair |
|
884
|
|
|
// |
|
885
|
|
|
// obs-NO-WS-CTL = %d1-8 / ; US-ASCII control |
|
886
|
|
|
// %d11 / ; characters that do not |
|
887
|
|
|
// %d12 / ; include the carriage |
|
888
|
|
|
// %d14-31 / ; return, line feed, and |
|
889
|
|
|
// %d127 ; white space characters |
|
890
|
|
|
charCode = token.codePointAt(0); |
|
891
|
|
|
|
|
892
|
|
|
// '\r', '\n', ' ', and '\t' have already been parsed above |
|
893
|
|
|
if ((charCode !== 127 && internals.c1Controls(charCode)) || charCode === 0 || token === '[') { |
|
894
|
|
|
// Fatal error |
|
895
|
|
|
updateResult(internals.diagnoses.errExpectingDTEXT); |
|
896
|
|
|
break; |
|
897
|
|
|
} |
|
898
|
|
|
else if (internals.c0Controls(charCode) || charCode === 127) { |
|
899
|
|
|
updateResult(internals.diagnoses.rfc5322DomainLiteralOBSDText); |
|
900
|
|
|
} |
|
901
|
|
|
|
|
902
|
|
|
parseData.literal += token; |
|
903
|
|
|
parseData.domain += token; |
|
904
|
|
|
atomData.domains[elementCount] += token; |
|
905
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
906
|
|
|
} |
|
907
|
|
|
|
|
908
|
|
|
break; |
|
909
|
|
|
|
|
910
|
|
|
// Quoted string |
|
911
|
|
|
case internals.components.contextQuotedString: |
|
912
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.4 |
|
913
|
|
|
// quoted-string = [CFWS] |
|
914
|
|
|
// DQUOTE *([FWS] qcontent) [FWS] DQUOTE |
|
915
|
|
|
// [CFWS] |
|
916
|
|
|
// |
|
917
|
|
|
// qcontent = qtext / quoted-pair |
|
918
|
|
|
switch (token) { |
|
919
|
|
|
// Quoted pair |
|
920
|
|
|
case '\\': |
|
921
|
|
|
context.stack.push(context.now); |
|
922
|
|
|
context.now = internals.components.contextQuotedPair; |
|
923
|
|
|
break; |
|
924
|
|
|
|
|
925
|
|
|
// Folding white space. Spaces are allowed as regular characters inside a quoted string - it's only FWS if we include '\t' or '\r\n' |
|
926
|
|
|
case '\r': |
|
927
|
|
|
if (emailLength === ++i || email[i] !== '\n') { |
|
928
|
|
|
// Fatal error |
|
929
|
|
|
updateResult(internals.diagnoses.errCRNoLF); |
|
930
|
|
|
break; |
|
931
|
|
|
} |
|
932
|
|
|
|
|
933
|
|
|
// Fallthrough |
|
934
|
|
|
|
|
935
|
|
|
case '\t': |
|
936
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.2 |
|
937
|
|
|
// Runs of FWS, comment, or CFWS that occur between lexical tokens in |
|
938
|
|
|
// a structured header field are semantically interpreted as a single |
|
939
|
|
|
// space character. |
|
940
|
|
|
|
|
941
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.4 |
|
942
|
|
|
// the CRLF in any FWS/CFWS that appears within the quoted-string [is] |
|
943
|
|
|
// semantically "invisible" and therefore not part of the |
|
944
|
|
|
// quoted-string |
|
945
|
|
|
|
|
946
|
|
|
parseData.local += ' '; |
|
947
|
|
|
atomData.locals[elementCount] += ' '; |
|
948
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
949
|
|
|
|
|
950
|
|
|
updateResult(internals.diagnoses.cfwsFWS); |
|
951
|
|
|
context.stack.push(context.now); |
|
952
|
|
|
context.now = internals.components.contextFWS; |
|
953
|
|
|
prevToken = token; |
|
954
|
|
|
break; |
|
955
|
|
|
|
|
956
|
|
|
// End of quoted string |
|
957
|
|
|
case '"': |
|
958
|
|
|
parseData.local += token; |
|
959
|
|
|
atomData.locals[elementCount] += token; |
|
960
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
961
|
|
|
context.prev = context.now; |
|
962
|
|
|
context.now = context.stack.pop(); |
|
963
|
|
|
break; |
|
964
|
|
|
|
|
965
|
|
|
// QTEXT |
|
966
|
|
|
default: |
|
967
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.4 |
|
968
|
|
|
// qtext = %d33 / ; Printable US-ASCII |
|
969
|
|
|
// %d35-91 / ; characters not including |
|
970
|
|
|
// %d93-126 / ; "\" or the quote character |
|
971
|
|
|
// obs-qtext |
|
972
|
|
|
// |
|
973
|
|
|
// obs-qtext = obs-NO-WS-CTL |
|
974
|
|
|
// |
|
975
|
|
|
// obs-NO-WS-CTL = %d1-8 / ; US-ASCII control |
|
976
|
|
|
// %d11 / ; characters that do not |
|
977
|
|
|
// %d12 / ; include the carriage |
|
978
|
|
|
// %d14-31 / ; return, line feed, and |
|
979
|
|
|
// %d127 ; white space characters |
|
980
|
|
|
charCode = token.codePointAt(0); |
|
981
|
|
|
|
|
982
|
|
|
if ((charCode !== 127 && internals.c1Controls(charCode)) || charCode === 0 || charCode === 10) { |
|
983
|
|
|
updateResult(internals.diagnoses.errExpectingQTEXT); |
|
984
|
|
|
} |
|
985
|
|
|
else if (internals.c0Controls(charCode) || charCode === 127) { |
|
986
|
|
|
updateResult(internals.diagnoses.deprecatedQTEXT); |
|
987
|
|
|
} |
|
988
|
|
|
|
|
989
|
|
|
parseData.local += token; |
|
990
|
|
|
atomData.locals[elementCount] += token; |
|
991
|
|
|
elementLength += Buffer.byteLength(token, 'utf8'); |
|
992
|
|
|
} |
|
993
|
|
|
|
|
994
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.4.1 |
|
995
|
|
|
// If the string can be represented as a dot-atom (that is, it contains |
|
996
|
|
|
// no characters other than atext characters or "." surrounded by atext |
|
997
|
|
|
// characters), then the dot-atom form SHOULD be used and the quoted- |
|
998
|
|
|
// string form SHOULD NOT be used. |
|
999
|
|
|
|
|
1000
|
|
|
break; |
|
1001
|
|
|
// Quoted pair |
|
1002
|
|
|
case internals.components.contextQuotedPair: |
|
1003
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.1 |
|
1004
|
|
|
// quoted-pair = ("\" (VCHAR / WSP)) / obs-qp |
|
1005
|
|
|
// |
|
1006
|
|
|
// VCHAR = %d33-126 ; visible (printing) characters |
|
1007
|
|
|
// WSP = SP / HTAB ; white space |
|
1008
|
|
|
// |
|
1009
|
|
|
// obs-qp = "\" (%d0 / obs-NO-WS-CTL / LF / CR) |
|
1010
|
|
|
// |
|
1011
|
|
|
// obs-NO-WS-CTL = %d1-8 / ; US-ASCII control |
|
1012
|
|
|
// %d11 / ; characters that do not |
|
1013
|
|
|
// %d12 / ; include the carriage |
|
1014
|
|
|
// %d14-31 / ; return, line feed, and |
|
1015
|
|
|
// %d127 ; white space characters |
|
1016
|
|
|
// |
|
1017
|
|
|
// i.e. obs-qp = "\" (%d0-8, %d10-31 / %d127) |
|
1018
|
|
|
charCode = token.codePointAt(0); |
|
1019
|
|
|
|
|
1020
|
|
|
if (charCode !== 127 && internals.c1Controls(charCode)) { |
|
1021
|
|
|
// Fatal error |
|
1022
|
|
|
updateResult(internals.diagnoses.errExpectingQPair); |
|
1023
|
|
|
} |
|
1024
|
|
|
else if ((charCode < 31 && charCode !== 9) || charCode === 127) { |
|
1025
|
|
|
// ' ' and '\t' are allowed |
|
1026
|
|
|
updateResult(internals.diagnoses.deprecatedQP); |
|
1027
|
|
|
} |
|
1028
|
|
|
|
|
1029
|
|
|
// At this point we know where this qpair occurred so we could check to see if the character actually needed to be quoted at all. |
|
1030
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.1.2 |
|
1031
|
|
|
// the sending system SHOULD transmit the form that uses the minimum quoting possible. |
|
1032
|
|
|
|
|
1033
|
|
|
context.prev = context.now; |
|
1034
|
|
|
// End of qpair |
|
1035
|
|
|
context.now = context.stack.pop(); |
|
1036
|
|
|
const escapeToken = '\\' + token; |
|
1037
|
|
|
|
|
1038
|
|
|
switch (context.now) { |
|
1039
|
|
|
case internals.components.contextComment: |
|
1040
|
|
|
break; |
|
1041
|
|
|
|
|
1042
|
|
|
case internals.components.contextQuotedString: |
|
1043
|
|
|
parseData.local += escapeToken; |
|
1044
|
|
|
atomData.locals[elementCount] += escapeToken; |
|
1045
|
|
|
|
|
1046
|
|
|
// The maximum sizes specified by RFC 5321 are octet counts, so we must include the backslash |
|
1047
|
|
|
elementLength += 2; |
|
1048
|
|
|
break; |
|
1049
|
|
|
|
|
1050
|
|
|
case internals.components.literal: |
|
1051
|
|
|
parseData.domain += escapeToken; |
|
1052
|
|
|
atomData.domains[elementCount] += escapeToken; |
|
1053
|
|
|
|
|
1054
|
|
|
// The maximum sizes specified by RFC 5321 are octet counts, so we must include the backslash |
|
1055
|
|
|
elementLength += 2; |
|
1056
|
|
|
break; |
|
1057
|
|
|
|
|
1058
|
|
|
// $lab:coverage:off$ |
|
1059
|
|
|
default: |
|
1060
|
|
|
throw new Error('quoted pair logic invoked in an invalid context: ' + context.now); |
|
1061
|
|
|
// $lab:coverage:on$ |
|
1062
|
|
|
} |
|
1063
|
|
|
break; |
|
1064
|
|
|
|
|
1065
|
|
|
// Comment |
|
1066
|
|
|
case internals.components.contextComment: |
|
1067
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.2 |
|
1068
|
|
|
// comment = "(" *([FWS] ccontent) [FWS] ")" |
|
1069
|
|
|
// |
|
1070
|
|
|
// ccontent = ctext / quoted-pair / comment |
|
1071
|
|
|
switch (token) { |
|
1072
|
|
|
// Nested comment |
|
1073
|
|
|
case '(': |
|
1074
|
|
|
// Nested comments are ok |
|
1075
|
|
|
context.stack.push(context.now); |
|
1076
|
|
|
context.now = internals.components.contextComment; |
|
1077
|
|
|
break; |
|
1078
|
|
|
|
|
1079
|
|
|
// End of comment |
|
1080
|
|
|
case ')': |
|
1081
|
|
|
context.prev = context.now; |
|
1082
|
|
|
context.now = context.stack.pop(); |
|
1083
|
|
|
break; |
|
1084
|
|
|
|
|
1085
|
|
|
// Quoted pair |
|
1086
|
|
|
case '\\': |
|
1087
|
|
|
context.stack.push(context.now); |
|
1088
|
|
|
context.now = internals.components.contextQuotedPair; |
|
1089
|
|
|
break; |
|
1090
|
|
|
|
|
1091
|
|
|
// Folding white space |
|
1092
|
|
|
case '\r': |
|
1093
|
|
|
if (emailLength === ++i || email[i] !== '\n') { |
|
1094
|
|
|
// Fatal error |
|
1095
|
|
|
updateResult(internals.diagnoses.errCRNoLF); |
|
1096
|
|
|
break; |
|
1097
|
|
|
} |
|
1098
|
|
|
|
|
1099
|
|
|
// Fallthrough |
|
1100
|
|
|
|
|
1101
|
|
|
case ' ': |
|
1102
|
|
|
case '\t': |
|
1103
|
|
|
updateResult(internals.diagnoses.cfwsFWS); |
|
1104
|
|
|
|
|
1105
|
|
|
context.stack.push(context.now); |
|
1106
|
|
|
context.now = internals.components.contextFWS; |
|
1107
|
|
|
prevToken = token; |
|
1108
|
|
|
break; |
|
1109
|
|
|
|
|
1110
|
|
|
// CTEXT |
|
1111
|
|
|
default: |
|
1112
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.3 |
|
1113
|
|
|
// ctext = %d33-39 / ; Printable US-ASCII |
|
1114
|
|
|
// %d42-91 / ; characters not including |
|
1115
|
|
|
// %d93-126 / ; "(", ")", or "\" |
|
1116
|
|
|
// obs-ctext |
|
1117
|
|
|
// |
|
1118
|
|
|
// obs-ctext = obs-NO-WS-CTL |
|
1119
|
|
|
// |
|
1120
|
|
|
// obs-NO-WS-CTL = %d1-8 / ; US-ASCII control |
|
1121
|
|
|
// %d11 / ; characters that do not |
|
1122
|
|
|
// %d12 / ; include the carriage |
|
1123
|
|
|
// %d14-31 / ; return, line feed, and |
|
1124
|
|
|
// %d127 ; white space characters |
|
1125
|
|
|
charCode = token.codePointAt(0); |
|
1126
|
|
|
|
|
1127
|
|
|
if (charCode === 0 || charCode === 10 || (charCode !== 127 && internals.c1Controls(charCode))) { |
|
1128
|
|
|
// Fatal error |
|
1129
|
|
|
updateResult(internals.diagnoses.errExpectingCTEXT); |
|
1130
|
|
|
break; |
|
1131
|
|
|
} |
|
1132
|
|
|
else if (internals.c0Controls(charCode) || charCode === 127) { |
|
1133
|
|
|
updateResult(internals.diagnoses.deprecatedCTEXT); |
|
1134
|
|
|
} |
|
1135
|
|
|
} |
|
1136
|
|
|
|
|
1137
|
|
|
break; |
|
1138
|
|
|
|
|
1139
|
|
|
// Folding white space |
|
1140
|
|
|
case internals.components.contextFWS: |
|
1141
|
|
|
// http://tools.ietf.org/html/rfc5322#section-3.2.2 |
|
1142
|
|
|
// FWS = ([*WSP CRLF] 1*WSP) / obs-FWS |
|
1143
|
|
|
// ; Folding white space |
|
1144
|
|
|
|
|
1145
|
|
|
// But note the erratum: |
|
1146
|
|
|
// http://www.rfc-editor.org/errata_search.php?rfc=5322&eid=1908: |
|
1147
|
|
|
// In the obsolete syntax, any amount of folding white space MAY be |
|
1148
|
|
|
// inserted where the obs-FWS rule is allowed. This creates the |
|
1149
|
|
|
// possibility of having two consecutive "folds" in a line, and |
|
1150
|
|
|
// therefore the possibility that a line which makes up a folded header |
|
1151
|
|
|
// field could be composed entirely of white space. |
|
1152
|
|
|
// |
|
1153
|
|
|
// obs-FWS = 1*([CRLF] WSP) |
|
1154
|
|
|
|
|
1155
|
|
|
if (prevToken === '\r') { |
|
1156
|
|
|
if (token === '\r') { |
|
1157
|
|
|
// Fatal error |
|
1158
|
|
|
updateResult(internals.diagnoses.errFWSCRLFx2); |
|
1159
|
|
|
break; |
|
1160
|
|
|
} |
|
1161
|
|
|
|
|
1162
|
|
|
if (++crlfCount > 1) { |
|
1163
|
|
|
// Multiple folds => obsolete FWS |
|
1164
|
|
|
updateResult(internals.diagnoses.deprecatedFWS); |
|
1165
|
|
|
} |
|
1166
|
|
|
else { |
|
1167
|
|
|
crlfCount = 1; |
|
1168
|
|
|
} |
|
1169
|
|
|
} |
|
1170
|
|
|
|
|
1171
|
|
|
switch (token) { |
|
1172
|
|
|
case '\r': |
|
1173
|
|
|
if (emailLength === ++i || email[i] !== '\n') { |
|
1174
|
|
|
// Fatal error |
|
1175
|
|
|
updateResult(internals.diagnoses.errCRNoLF); |
|
1176
|
|
|
} |
|
1177
|
|
|
|
|
1178
|
|
|
break; |
|
1179
|
|
|
|
|
1180
|
|
|
case ' ': |
|
1181
|
|
|
case '\t': |
|
1182
|
|
|
break; |
|
1183
|
|
|
|
|
1184
|
|
|
default: |
|
1185
|
|
|
if (prevToken === '\r') { |
|
1186
|
|
|
// Fatal error |
|
1187
|
|
|
updateResult(internals.diagnoses.errFWSCRLFEnd); |
|
1188
|
|
|
} |
|
1189
|
|
|
|
|
1190
|
|
|
crlfCount = 0; |
|
1191
|
|
|
|
|
1192
|
|
|
// End of FWS |
|
1193
|
|
|
context.prev = context.now; |
|
1194
|
|
|
context.now = context.stack.pop(); |
|
1195
|
|
|
|
|
1196
|
|
|
// Look at this token again in the parent context |
|
1197
|
|
|
--i; |
|
1198
|
|
|
} |
|
1199
|
|
|
|
|
1200
|
|
|
prevToken = token; |
|
1201
|
|
|
break; |
|
1202
|
|
|
|
|
1203
|
|
|
// Unexpected context |
|
1204
|
|
|
// $lab:coverage:off$ |
|
1205
|
|
|
default: |
|
1206
|
|
|
throw new Error('unknown context: ' + context.now); |
|
1207
|
|
|
// $lab:coverage:on$ |
|
1208
|
|
|
} // Primary state machine |
|
1209
|
|
|
|
|
1210
|
|
|
if (maxResult > internals.categories.rfc5322) { |
|
1211
|
|
|
// Fatal error, no point continuing |
|
1212
|
|
|
break; |
|
1213
|
|
|
} |
|
1214
|
|
|
} // Token loop |
|
1215
|
|
|
|
|
1216
|
|
|
// Check for errors |
|
1217
|
|
|
if (maxResult < internals.categories.rfc5322) { |
|
1218
|
|
|
const punycodeLength = Punycode.encode(parseData.domain).length; |
|
1219
|
|
|
// Fatal errors |
|
1220
|
|
|
if (context.now === internals.components.contextQuotedString) { |
|
1221
|
|
|
updateResult(internals.diagnoses.errUnclosedQuotedString); |
|
1222
|
|
|
} |
|
1223
|
|
|
else if (context.now === internals.components.contextQuotedPair) { |
|
1224
|
|
|
updateResult(internals.diagnoses.errBackslashEnd); |
|
1225
|
|
|
} |
|
1226
|
|
|
else if (context.now === internals.components.contextComment) { |
|
1227
|
|
|
updateResult(internals.diagnoses.errUnclosedComment); |
|
1228
|
|
|
} |
|
1229
|
|
|
else if (context.now === internals.components.literal) { |
|
1230
|
|
|
updateResult(internals.diagnoses.errUnclosedDomainLiteral); |
|
1231
|
|
|
} |
|
1232
|
|
|
else if (token === '\r') { |
|
|
|
|
|
|
1233
|
|
|
updateResult(internals.diagnoses.errFWSCRLFEnd); |
|
1234
|
|
|
} |
|
1235
|
|
|
else if (parseData.domain.length === 0) { |
|
1236
|
|
|
updateResult(internals.diagnoses.errNoDomain); |
|
1237
|
|
|
} |
|
1238
|
|
|
else if (elementLength === 0) { |
|
1239
|
|
|
updateResult(internals.diagnoses.errDotEnd); |
|
1240
|
|
|
} |
|
1241
|
|
|
else if (hyphenFlag) { |
|
1242
|
|
|
updateResult(internals.diagnoses.errDomainHyphenEnd); |
|
1243
|
|
|
} |
|
1244
|
|
|
|
|
1245
|
|
|
// Other errors |
|
1246
|
|
|
else if (punycodeLength > 255) { |
|
1247
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.2 |
|
1248
|
|
|
// The maximum total length of a domain name or number is 255 octets. |
|
1249
|
|
|
updateResult(internals.diagnoses.rfc5322DomainTooLong); |
|
1250
|
|
|
} |
|
1251
|
|
|
else if (Buffer.byteLength(parseData.local, 'utf8') + punycodeLength + /* '@' */ 1 > 254) { |
|
1252
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.1.2 |
|
1253
|
|
|
// Forward-path = Path |
|
1254
|
|
|
// |
|
1255
|
|
|
// Path = "<" [ A-d-l ":" ] Mailbox ">" |
|
1256
|
|
|
// |
|
1257
|
|
|
// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.3 |
|
1258
|
|
|
// The maximum total length of a reverse-path or forward-path is 256 octets (including the punctuation and element separators). |
|
1259
|
|
|
// |
|
1260
|
|
|
// Thus, even without (obsolete) routing information, the Mailbox can only be 254 characters long. This is confirmed by this verified |
|
1261
|
|
|
// erratum to RFC 3696: |
|
1262
|
|
|
// |
|
1263
|
|
|
// http://www.rfc-editor.org/errata_search.php?rfc=3696&eid=1690 |
|
1264
|
|
|
// However, there is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands of 254 characters. Since |
|
1265
|
|
|
// addresses that do not fit in those fields are not normally useful, the upper limit on address lengths should normally be considered |
|
1266
|
|
|
// to be 254. |
|
1267
|
|
|
updateResult(internals.diagnoses.rfc5322TooLong); |
|
1268
|
|
|
} |
|
1269
|
|
|
else if (elementLength > 63) { |
|
1270
|
|
|
// http://tools.ietf.org/html/rfc1035#section-2.3.4 |
|
1271
|
|
|
// labels 63 octets or less |
|
1272
|
|
|
updateResult(internals.diagnoses.rfc5322LabelTooLong); |
|
1273
|
|
|
} |
|
1274
|
|
|
else if (options.minDomainAtoms && atomData.domains.length < options.minDomainAtoms) { |
|
1275
|
|
|
updateResult(internals.diagnoses.errDomainTooShort); |
|
1276
|
|
|
} |
|
1277
|
|
|
else if (options.tldWhitelist || options.tldBlacklist) { |
|
1278
|
|
|
const tldAtom = atomData.domains[elementCount]; |
|
1279
|
|
|
|
|
1280
|
|
|
if (!internals.validDomain(tldAtom, options)) { |
|
1281
|
|
|
updateResult(internals.diagnoses.errUnknownTLD); |
|
1282
|
|
|
} |
|
1283
|
|
|
} |
|
1284
|
|
|
} // Check for errors |
|
1285
|
|
|
|
|
1286
|
|
|
// Finish |
|
1287
|
|
|
if (maxResult < internals.categories.dnsWarn) { |
|
1288
|
|
|
// Per RFC 5321, domain atoms are limited to letter-digit-hyphen, so we only need to check code <= 57 to check for a digit |
|
1289
|
|
|
const code = atomData.domains[elementCount].codePointAt(0); |
|
1290
|
|
|
|
|
1291
|
|
|
if (code <= 57) { |
|
1292
|
|
|
updateResult(internals.diagnoses.rfc5321TLDNumeric); |
|
1293
|
|
|
} |
|
1294
|
|
|
} |
|
1295
|
|
|
|
|
1296
|
|
|
if (maxResult < threshold) { |
|
1297
|
|
|
maxResult = internals.diagnoses.valid; |
|
1298
|
|
|
} |
|
1299
|
|
|
|
|
1300
|
|
|
const finishResult = diagnose ? maxResult : maxResult < internals.defaultThreshold; |
|
1301
|
|
|
|
|
1302
|
|
|
if (callback) { |
|
1303
|
|
|
callback(finishResult); |
|
1304
|
|
|
} |
|
1305
|
|
|
|
|
1306
|
|
|
return finishResult; |
|
1307
|
|
|
}; |
|
1308
|
|
|
|
|
1309
|
|
|
|
|
1310
|
|
|
exports.diagnoses = internals.validate.diagnoses = (function () { |
|
1311
|
|
|
|
|
1312
|
|
|
const diag = {}; |
|
1313
|
|
|
const keys = Object.keys(internals.diagnoses); |
|
1314
|
|
|
for (let i = 0; i < keys.length; ++i) { |
|
1315
|
|
|
const key = keys[i]; |
|
1316
|
|
|
diag[key] = internals.diagnoses[key]; |
|
1317
|
|
|
} |
|
1318
|
|
|
|
|
1319
|
|
|
return diag; |
|
1320
|
|
|
})(); |
|
1321
|
|
|
|
|
1322
|
|
|
|
|
1323
|
|
|
exports.normalize = internals.normalize = function (email) { |
|
1324
|
|
|
|
|
1325
|
|
|
// $lab:coverage:off$ |
|
1326
|
|
|
if (process.version[1] === '4' && email.indexOf('\u0000') >= 0) { |
|
1327
|
|
|
return internals.nulNormalize(email); |
|
1328
|
|
|
} |
|
1329
|
|
|
// $lab:coverage:on$ |
|
1330
|
|
|
|
|
1331
|
|
|
|
|
1332
|
|
|
return email.normalize('NFC'); |
|
1333
|
|
|
}; |
|
1334
|
|
|
|
DigitalState /
Formio
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