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<?php namespace Egulias\EmailValidator\Parser; use Egulias\EmailValidator\EmailLexer; use Egulias\EmailValidator\Result\Result; use Egulias\EmailValidator\Result\ValidEmail; use Egulias\EmailValidator\Result\InvalidEmail; use Egulias\EmailValidator\Warning\CFWSWithFWS; use Egulias\EmailValidator\Warning\IPV6BadChar; use Egulias\EmailValidator\Result\Reason\CRNoLF; use Egulias\EmailValidator\Warning\IPV6ColonEnd; use Egulias\EmailValidator\Warning\IPV6MaxGroups; use Egulias\EmailValidator\Warning\ObsoleteDTEXT; use Egulias\EmailValidator\Warning\AddressLiteral; use Egulias\EmailValidator\Warning\IPV6ColonStart; use Egulias\EmailValidator\Warning\IPV6Deprecated; use Egulias\EmailValidator\Warning\IPV6GroupCount; use Egulias\EmailValidator\Warning\IPV6DoubleColon; use Egulias\EmailValidator\Result\Reason\ExpectingDTEXT; use Egulias\EmailValidator\Result\Reason\UnusualElements; use Egulias\EmailValidator\Warning\DomainLiteral as WarningDomainLiteral; class DomainLiteral extends PartParser { public const IPV4_REGEX = '/\\b(?:(?:25[0-5]\|2[0-4][0-9]\|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]\|2[0-4][0-9]\|[01]?[0-9][0-9]?)$/'; public const OBSOLETE_WARNINGS = [ EmailLexer::INVALID, EmailLexer::C_DEL, EmailLexer::S_LF, EmailLexer::S_BACKSLASH ]; public function parse(): Result { $this->addTagWarnings(); $IPv6TAG = false; $addressLiteral = ''; do { if ($this->lexer->current->isA(EmailLexer::C_NUL)) { return new InvalidEmail(new ExpectingDTEXT(), $this->lexer->current->value); } $this->addObsoleteWarnings(); if ($this->lexer->isNextTokenAny(array(EmailLexer::S_OPENBRACKET, EmailLexer::S_OPENBRACKET))) { return new InvalidEmail(new ExpectingDTEXT(), $this->lexer->current->value); } if ($this->lexer->isNextTokenAny( array(EmailLexer::S_HTAB, EmailLexer::S_SP, EmailLexer::CRLF) )) { $this->warnings[CFWSWithFWS::CODE] = new CFWSWithFWS(); $this->parseFWS(); } if ($this->lexer->isNextToken(EmailLexer::S_CR)) { return new InvalidEmail(new CRNoLF(), $this->lexer->current->value); } if ($this->lexer->current->isA(EmailLexer::S_BACKSLASH)) { return new InvalidEmail(new UnusualElements($this->lexer->current->value), $this->lexer->current->value); } if ($this->lexer->current->isA(EmailLexer::S_IPV6TAG)) { $IPv6TAG = true; } if ($this->lexer->current->isA(EmailLexer::S_CLOSEBRACKET)) { break; } $addressLiteral .= $this->lexer->current->value; } while ($this->lexer->moveNext()); //Encapsulate $addressLiteral = str_replace('[', '', $addressLiteral); $isAddressLiteralIPv4 = $this->checkIPV4Tag($addressLiteral); if (!$isAddressLiteralIPv4) { return new ValidEmail(); } else { $addressLiteral = $this->convertIPv4ToIPv6($addressLiteral); } if (!$IPv6TAG) { $this->warnings[WarningDomainLiteral::CODE] = new WarningDomainLiteral(); return new ValidEmail(); } $this->warnings[AddressLiteral::CODE] = new AddressLiteral(); $this->checkIPV6Tag($addressLiteral); return new ValidEmail(); } /** * @param string $addressLiteral * @param int $maxGroups / public function checkIPV6Tag($addressLiteral, $maxGroups = 8): void { $prev = $this->lexer->getPrevious(); if ($prev->isA(EmailLexer::S_COLON)) { $this->warnings[IPV6ColonEnd::CODE] = new IPV6ColonEnd(); } $IPv6 = substr($addressLiteral, 5); //Daniel Marschall's new IPv6 testing strategy $matchesIP = explode(':', $IPv6); $groupCount = count($matchesIP); $colons = strpos($IPv6, '::'); if (count(preg_grep('/^[0-9A-Fa-f]{0,4}$/', $matchesIP, PREG_GREP_INVERT)) !== 0) { $this->warnings[IPV6BadChar::CODE] = new IPV6BadChar(); } if ($colons === false) { // We need exactly the right number of groups if ($groupCount !== $maxGroups) { $this->warnings[IPV6GroupCount::CODE] = new IPV6GroupCount(); } return; } if ($colons !== strrpos($IPv6, '::')) { $this->warnings[IPV6DoubleColon::CODE] = new IPV6DoubleColon(); return; } if ($colons === 0 \|\| $colons === (strlen($IPv6) - 2)) { // RFC 4291 allows :: at the start or end of an address //with 7 other groups in addition ++$maxGroups; } if ($groupCount > $maxGroups) { $this->warnings[IPV6MaxGroups::CODE] = new IPV6MaxGroups(); } elseif ($groupCount === $maxGroups) { $this->warnings[IPV6Deprecated::CODE] = new IPV6Deprecated(); } } public function convertIPv4ToIPv6(string $addressLiteralIPv4): string { $matchesIP = []; $IPv4Match = preg_match(self::IPV4_REGEX, $addressLiteralIPv4, $matchesIP); // Extract IPv4 part from the end of the address-literal (if there is one) if ($IPv4Match > 0) { $index = (int) strrpos($addressLiteralIPv4, $matchesIP[0]); //There's a match but it is at the start if ($index > 0) { // Convert IPv4 part to IPv6 format for further testing return substr($addressLiteralIPv4, 0, $index) . '0:0'; } } return $addressLiteralIPv4; } /* * @param string $addressLiteral * * @return bool */ protected function checkIPV4Tag($addressLiteral): bool { $matchesIP = []; $IPv4Match = preg_match(self::IPV4_REGEX, $addressLiteral, $matchesIP); // Extract IPv4 part from the end of the address-literal (if there is one) if ($IPv4Match > 0) { $index = strrpos($addressLiteral, $matchesIP[0]); //There's a match but it is at the start if ($index === 0) { $this->warnings[AddressLiteral::CODE] = new AddressLiteral(); return false; } } return true; } private function addObsoleteWarnings(): void { if (in_array($this->lexer->current->type, self::OBSOLETE_WARNINGS)) { $this->warnings[ObsoleteDTEXT::CODE] = new ObsoleteDTEXT(); } } private function addTagWarnings(): void { if ($this->lexer->isNextToken(EmailLexer::S_COLON)) { $this->warnings[IPV6ColonStart::CODE] = new IPV6ColonStart(); } if ($this->lexer->isNextToken(EmailLexer::S_IPV6TAG)) { $lexer = clone $this->lexer; $lexer->moveNext(); if ($lexer->isNextToken(EmailLexer::S_DOUBLECOLON)) { $this->warnings[IPV6ColonStart::CODE] = new IPV6ColonStart(); } } } }

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