diff --git a/docs/dev-code-quality.txt b/docs/dev-code-quality.txt index 6c4deb170..d8639be43 100644 --- a/docs/dev-code-quality.txt +++ b/docs/dev-code-quality.txt @@ -26,5 +26,7 @@ URIScheme - needs to have callable generic checks news - doesn't validate opaque path nntp - doesn't constrain path tel - doesn't validate phone numbers, only allows characters '+', '1-9', and 'x' + sms - doesn't validate phone numbers, only allows '+' and digits; of the + RFC 5724 parameters only 'body' is kept vim: et sw=4 sts=4 diff --git a/library/HTMLPurifier.includes.php b/library/HTMLPurifier.includes.php index 1f99a4aa2..9b92995a3 100644 --- a/library/HTMLPurifier.includes.php +++ b/library/HTMLPurifier.includes.php @@ -231,6 +231,7 @@ require 'HTMLPurifier/URIScheme/mailto.php'; require 'HTMLPurifier/URIScheme/news.php'; require 'HTMLPurifier/URIScheme/nntp.php'; +require 'HTMLPurifier/URIScheme/sms.php'; require 'HTMLPurifier/URIScheme/tel.php'; require 'HTMLPurifier/VarParser/Flexible.php'; require 'HTMLPurifier/VarParser/Native.php'; diff --git a/library/HTMLPurifier.safe-includes.php b/library/HTMLPurifier.safe-includes.php index 8a417d246..814702926 100644 --- a/library/HTMLPurifier.safe-includes.php +++ b/library/HTMLPurifier.safe-includes.php @@ -225,6 +225,7 @@ require_once $__dir . '/HTMLPurifier/URIScheme/mailto.php'; require_once $__dir . '/HTMLPurifier/URIScheme/news.php'; require_once $__dir . '/HTMLPurifier/URIScheme/nntp.php'; +require_once $__dir . '/HTMLPurifier/URIScheme/sms.php'; require_once $__dir . '/HTMLPurifier/URIScheme/tel.php'; require_once $__dir . '/HTMLPurifier/VarParser/Flexible.php'; require_once $__dir . '/HTMLPurifier/VarParser/Native.php'; diff --git a/library/HTMLPurifier/ConfigSchema/schema.ser b/library/HTMLPurifier/ConfigSchema/schema.ser index 34ea68371..82b619562 100644 --- a/library/HTMLPurifier/ConfigSchema/schema.ser +++ b/library/HTMLPurifier/ConfigSchema/schema.ser @@ -1 +1 @@ -O:25:"HTMLPurifier_ConfigSchema":3:{s:8:"defaults";a:130:{s:19:"Attr.AllowedClasses";N;s:24:"Attr.AllowedFrameTargets";a:0:{}s:15:"Attr.AllowedRel";a:0:{}s:15:"Attr.AllowedRev";a:0:{}s:18:"Attr.ClassUseCDATA";N;s:20:"Attr.DefaultImageAlt";N;s:24:"Attr.DefaultInvalidImage";s:0:"";s:27:"Attr.DefaultInvalidImageAlt";s:13:"Invalid 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\ No newline at end of file diff --git a/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt b/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt index eb97307e2..15c73f43f 100644 --- a/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt +++ b/library/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt @@ -9,6 +9,7 @@ array ( 'nntp' => true, 'news' => true, 'tel' => true, + 'sms' => true, ) --DESCRIPTION-- Whitelist that defines the schemes that a URI is allowed to have. This diff --git a/library/HTMLPurifier/URIScheme/sms.php b/library/HTMLPurifier/URIScheme/sms.php new file mode 100644 index 000000000..320828ba6 --- /dev/null +++ b/library/HTMLPurifier/URIScheme/sms.php @@ -0,0 +1,132 @@ +host; // sms://NUMBER hides the recipient here + $uri->userinfo = null; + $uri->host = null; + $uri->port = null; + + $phone_number = $uri->path; + $body_content = null; + $body_in_path = false; + + // "&" is no query delimiter, so this all lands in the path + if (strpos($phone_number, '&') !== false) { + $parts = explode('&', $phone_number); + $phone_number = array_shift($parts); + $body_content = $this->extractBody($parts); + $body_in_path = !is_null($body_content); + } + + // query body wins, so a mixed URI comes out in spec form + if (!is_null($uri->query)) { + $query_body = $this->extractBody(explode('&', $uri->query)); + if (!is_null($query_body)) { + $body_content = $query_body; + $body_in_path = false; + } + } + + $phone_number = $this->cleanPhoneNumber($phone_number); + if ($phone_number === '' && !is_null($authority)) { + $phone_number = $this->cleanPhoneNumber($authority); + } + + // nobody to send it to + if ($phone_number === '') { + $body_content = null; + } + + if ($body_content !== null) { + $body_content = $this->sanitizeBody($body_content); + } + + // an empty body keeps its parameter + $uri->path = $phone_number; + $uri->query = null; + if (!is_null($body_content)) { + if ($body_in_path) { + $uri->path .= '&body=' . $body_content; + } else { + $uri->query = 'body=' . $body_content; + } + } + + return true; + } + + /** + * Reduce a recipient to digits, EXCEPT for a leading plus sign. + * @param string $candidate + * @return string + */ + private function cleanPhoneNumber($candidate) + { + return preg_replace('/(?!^\+)[^\d]/', '', rawurldecode($candidate)); + } + + /** + * First 'body' value out of a list of name=value pairs, or null. RFC 5234 + * makes the field name case-insensitive, so we take it in any case. + * @param string[] $params + * @return string|null + */ + private function extractBody($params) + { + foreach ($params as $param) { + if (strpos($param, '=') === false) { + continue; + } + list($param_name, $param_value) = explode('=', $param, 2); + if (strtolower($param_name) === 'body') { + return $param_value; + } + } + return null; + } + + /** + * Percent-encode the body so it cannot escape the href; the generator + * escapes it again on output. We decode first so purifying the same URI + * twice does not stack encoding levels. + * @param string $body + * @return string + */ + private function sanitizeBody($body) + { + return rawurlencode(rawurldecode($body)); + } +} diff --git a/tests/HTMLPurifier/AttrDef/URITest.php b/tests/HTMLPurifier/AttrDef/URITest.php index 1309f3c20..f78f80858 100644 --- a/tests/HTMLPurifier/AttrDef/URITest.php +++ b/tests/HTMLPurifier/AttrDef/URITest.php @@ -25,6 +25,18 @@ public function testIntegration() $this->assertDef('tel:+15555555555'); $this->assertDef('tel:+15555 555 555', 'tel:+15555555555'); $this->assertDef('tel:+15555%20555%20555', 'tel:+15555555555'); + $this->assertDef('sms:+15555555555'); + $this->assertDef('sms:+15555 555 555', 'sms:+15555555555'); + $this->assertDef('sms:+15555%20555%20555', 'sms:+15555555555'); + $this->assertDef('sms:5555&body=HOME', 'sms:5555&body=HOME'); + $this->assertDef('sms:5555?body=HOME', 'sms:5555?body=HOME'); + // an already normalized body is left alone, so purifying twice is stable + $this->assertDef('sms:5555?body=say%20%22hi%22'); + // one decode, one encode: a double encoded body keeps its extra level + $this->assertDef('sms:5555?body=%253Cscript%253E'); + // non-ASCII survives in both forms + $this->assertDef('sms:5555?body=%E2%9C%93%20ok'); + $this->assertDef('sms:5555&body=%E2%9C%93'); } public function testIntegrationWithPercentEncoder() diff --git a/tests/HTMLPurifier/URIFilter/MakeAbsoluteTest.php b/tests/HTMLPurifier/URIFilter/MakeAbsoluteTest.php index 4a4c2363d..fa0c0ab24 100644 --- a/tests/HTMLPurifier/URIFilter/MakeAbsoluteTest.php +++ b/tests/HTMLPurifier/URIFilter/MakeAbsoluteTest.php @@ -44,6 +44,15 @@ public function testPreserveAltSchemeWithTel() $this->assertFiltering('tel:+15555%20555%20555'); } + public function testPreserveAltSchemeWithSms() + { + $this->assertFiltering('sms:+15555555555'); + $this->assertFiltering('sms:+15555 555 555'); + $this->assertFiltering('sms:+15555%20555%20555'); + $this->assertFiltering('sms:5555&body=HOME'); + $this->assertFiltering('sms:5555?body=HOME'); + } + public function testFilterIgnoreHTTPSpecialCase() { $this->assertFiltering('http:/', 'http://example.com/'); diff --git a/tests/HTMLPurifier/URIParserTest.php b/tests/HTMLPurifier/URIParserTest.php index 6b9712b37..e49ca2175 100644 --- a/tests/HTMLPurifier/URIParserTest.php +++ b/tests/HTMLPurifier/URIParserTest.php @@ -81,6 +81,29 @@ public function testTelURI() ); } + public function testSmsURI() + { + $this->assertParsing( + 'sms:+1 (555) 555-5555', + 'sms', null, null, null, '+1 (555) 555-5555', null, null + ); + $this->assertParsing( + 'sms:+1%20(555)%20555-5555', + 'sms', null, null, null, '+1%20(555)%20555-5555', null, null + ); + // RFC 3986 only treats "?" as the query delimiter, so the common-on-the-web + // sms:NUMBER&body=TEXT form parses entirely into the path. Splitting the + // body out is HTMLPurifier_URIScheme_sms's job, not the generic parser's. + $this->assertParsing( + 'sms:5555&body=HOME', + 'sms', null, null, null, '5555&body=HOME', null, null + ); + $this->assertParsing( + 'sms:5555?body=HOME', + 'sms', null, null, null, '5555', 'body=HOME', null + ); + } + public function testIPv4Address() { $this->assertParsing( diff --git a/tests/HTMLPurifier/URISchemeTest.php b/tests/HTMLPurifier/URISchemeTest.php index ade89cc83..6fe48a309 100644 --- a/tests/HTMLPurifier/URISchemeTest.php +++ b/tests/HTMLPurifier/URISchemeTest.php @@ -215,6 +215,275 @@ public function test_tel_strip_letters() ); } + public function test_sms_strip_punctuation() + { + $this->assertValidation( + 'sms:+1 (555) 555-5555', 'sms:+15555555555' + ); + } + + public function test_sms_with_url_encoding() + { + $this->assertValidation( + 'sms:+1%20(555)%20555-5555', 'sms:+15555555555' + ); + } + + public function test_sms_regular() + { + $this->assertValidation( + 'sms:+15555555555' + ); + } + + public function test_sms_no_plus() + { + $this->assertValidation( + 'sms:555-555-5555', 'sms:5555555555' + ); + } + + public function test_sms_strip_letters() + { + $this->assertValidation( + 'sms:abcd1234', + 'sms:1234' + ); + } + + public function test_sms_with_body_query() + { + $this->assertValidation( + 'sms:5555&body=HOME', + 'sms:5555&body=HOME' + ); + } + + public function test_sms_strip_invalid_params() + { + $this->assertValidation( + 'sms:+15555555555&body=Hello&subject=Test', + 'sms:+15555555555&body=Hello' + ); + } + + public function test_sms_with_url_encoded_body() + { + $this->assertValidation( + 'sms:5555&body=Hello%20World', + 'sms:5555&body=Hello%20World' + ); + } + + public function test_sms_strip_dangerous_query_params() + { + // A literal "<" never reaches the scheme: HTMLPurifier_URIParser + // excludes ["<>] from the path, so the body is already empty here + $this->assertValidation( + 'sms:5555&body=&subject=Test', + 'sms:5555&body=' + ); + } + + public function test_sms_encoded_markup_in_path_body_stays_encoded() + { + // Percent-encoded markup does reach sanitizeBody(). It is re-encoded + // rather than dropped, so it is inert in an href without losing text. + $this->assertValidation( + 'sms:5555&body=%3Cscript%3Ealert(1)%3C/script%3E', + 'sms:5555&body=%3Cscript%3Ealert%281%29%3C%2Fscript%3E' + ); + } + + public function test_sms_strip_invalid_query_params() + { + $this->assertValidation( + 'sms:5555&body=HOME&invalid=param&subject=Test', + 'sms:5555&body=HOME' + ); + } + + public function test_sms_no_body() + { + $this->assertValidation( + 'sms:988' + ); + } + + public function test_sms_standard_query_format() + { + // RFC 5724's ?body= form is preserved as-is + $this->assertValidation( + 'sms:741741?body=SEIZE' + ); + } + + public function test_sms_query_body_wins_over_path_body() + { + $this->assertValidation( + 'sms:741741&body=PATH?body=QUERY', + 'sms:741741?body=QUERY' + ); + } + + public function test_sms_strip_dangerous_query_params_standard_format() + { + // As above: the parser truncates at the literal "<" before the + // scheme sees it + $this->assertValidation( + 'sms:5555?body=&subject=Test', + 'sms:5555?body=' + ); + } + + public function test_sms_encoded_markup_in_query_body_stays_encoded() + { + $this->assertValidation( + 'sms:5555?body=%3Cimg%20src=x%20onerror=alert(1)%3E', + 'sms:5555?body=%3Cimg%20src%3Dx%20onerror%3Dalert%281%29%3E' + ); + } + + public function test_sms_short_code() + { + $this->assertValidation( + 'sms:741741&body=SEIZE' + ); + } + + public function test_sms_body_name_is_case_insensitive_in_query() + { + // RFC 5724 spells the field name as the ABNF literal "body", and + // RFC 5234 makes ABNF literals case-insensitive + $this->assertValidation( + 'sms:5555?BODY=HOME', + 'sms:5555?body=HOME' + ); + } + + public function test_sms_body_name_is_case_insensitive_in_path() + { + $this->assertValidation( + 'sms:5555&Body=HOME', + 'sms:5555&body=HOME' + ); + } + + public function test_sms_first_body_wins_in_query() + { + $this->assertValidation( + 'sms:5555?body=first&body=second', + 'sms:5555?body=first' + ); + } + + public function test_sms_first_body_wins_in_path() + { + $this->assertValidation( + 'sms:5555&body=first&body=second', + 'sms:5555&body=first' + ); + } + + public function test_sms_path_params_without_body() + { + $this->assertValidation( + 'sms:5555&subject=T', + 'sms:5555' + ); + } + + public function test_sms_query_params_without_body() + { + $this->assertValidation( + 'sms:5555?subject=T', + 'sms:5555' + ); + } + + public function test_sms_keeps_quotes_in_body_encoded() + { + // Quotes are percent-encoded, not deleted: the message survives and + // still cannot terminate the href attribute + $this->assertValidation( + 'sms:5555?body=say%20%22hi%22%20%27there%27', + 'sms:5555?body=say%20%22hi%22%20%27there%27' + ); + } + + public function test_sms_keeps_quotes_in_path_body_encoded() + { + $this->assertValidation( + 'sms:5555&body=say%20%22hi%22', + 'sms:5555&body=say%20%22hi%22' + ); + } + + public function test_sms_param_without_value_separator() + { + $this->assertValidation( + 'sms:5555&body', + 'sms:5555' + ); + } + + public function test_sms_empty_query() + { + $this->assertValidation( + 'sms:5555?', + 'sms:5555' + ); + } + + public function test_sms_strips_authority() + { + $this->assertValidation( + 'sms://user@example.com:99/5555', + 'sms:5555' + ); + } + + public function test_sms_recovers_recipient_from_authority() + { + // sms://NUMBER?body=... parses the recipient into the host; keep it + // rather than emitting a message with nobody to send it to + $this->assertValidation( + 'sms://5551234?body=HOME', + 'sms:5551234?body=HOME' + ); + } + + public function test_sms_drops_body_when_authority_is_not_a_number() + { + $this->assertValidation( + 'sms://example.com?body=HOME', + 'sms:' + ); + } + + public function test_sms_drops_body_without_recipient() + { + $this->assertValidation( + 'sms:?body=HOME', + 'sms:' + ); + } + + public function test_sms_drops_path_body_without_recipient() + { + $this->assertValidation( + 'sms:&body=HOME', + 'sms:' + ); + } + + public function test_sms_preserves_fragment() + { + $this->assertValidation( + 'sms:5555#frag' + ); + } + public function test_data_png() { $this->assertValidation(