fast-xml-parser/lib/fxp.cjs

Validate XML, Parse XML, Build XML without C/C++ based libraries

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r=this.siblingStacks[n],s=i?`${i}:${t}`:t,o=r.get(s)||0;let a=0;for(const t of r.values())a+=t;r.set(s,o+1);const l={tag:t,position:a,counter:o};null!=i&&(l.namespace=i),null!=e&&(l.values=e),this.path.push(l)}pop(){if(0===this.path.length)return;this._pathStringCache=null;const t=this.path.pop();return this.siblingStacks.length>this.path.length+1&&(this.siblingStacks.length=this.path.length+1),t}updateCurrent(t){if(this.path.length>0){const e=this.path[this.path.length-1];null!=t&&(e.values=t)}}getCurrentTag(){return this.path.length>0?this.path[this.path.length-1].tag:void 0}getCurrentNamespace(){return this.path.length>0?this.path[this.path.length-1].namespace:void 0}getAttrValue(t){if(0!==this.path.length)return this.path[this.path.length-1].values?.[t]}hasAttr(t){if(0===this.path.length)return!1;const e=this.path[this.path.length-1];return void 0!==e.values&&t in e.values}getPosition(){return 0===this.path.length?-1:this.path[this.path.length-1].position??0}getCounter(){return 0===this.path.length?-1:this.path[this.path.length-1].counter??0}getIndex(){return this.getPosition()}getDepth(){return this.path.length}toString(t,e=!0){const i=t||this.separator;if(i===this.separator&&!0===e){if(null!==this._pathStringCache)return this._pathStringCache;const t=this.path.map(t=>t.namespace?`${t.namespace}:${t.tag}`:t.tag).join(i);return this._pathStringCache=t,t}return this.path.map(t=>e&&t.namespace?`${t.namespace}:${t.tag}`:t.tag).join(i)}toArray(){return this.path.map(t=>t.tag)}reset(){this._pathStringCache=null,this.path=[],this.siblingStacks=[]}matches(t){const e=t.segments;return 0!==e.length&&(t.hasDeepWildcard()?this._matchWithDeepWildcard(e):this._matchSimple(e))}_matchSimple(t){if(this.path.length!==t.length)return!1;for(let e=0;e<t.length;e++)if(!this._matchSegment(t[e],this.path[e],e===this.path.length-1))return!1;return!0}_matchWithDeepWildcard(t){let e=this.path.length-1,i=t.length-1;for(;i>=0&&e>=0;){const n=t[i];if("deep-wildcard"===n.type){if(i--,i<0)return!0;const n=t[i];let r=!1;for(let t=e;t>=0;t--)if(this._matchSegment(n,this.path[t],t===this.path.length-1)){e=t-1,i--,r=!0;break}if(!r)return!1}else{if(!this._matchSegment(n,this.path[e],e===this.path.length-1))return!1;e--,i--}}return i<0}_matchSegment(t,e,i){if("*"!==t.tag&&t.tag!==e.tag)return!1;if(void 0!==t.namespace&&"*"!==t.namespace&&t.namespace!==e.namespace)return!1;if(void 0!==t.attrName){if(!i)return!1;if(!e.values||!(t.attrName in e.values))return!1;if(void 0!==t.attrValue&&String(e.values[t.attrName])!==String(t.attrValue))return!1}if(void 0!==t.position){if(!i)return!1;const n=e.counter??0;if("first"===t.position&&0!==n)return!1;if("odd"===t.position&&n%2!=1)return!1;if("even"===t.position&&n%2!=0)return!1;if("nth"===t.position&&n!==t.positionValue)return!1}return!0}matchesAny(t){return t.matchesAny(this)}snapshot(){return{path:this.path.map(t=>({...t})),siblingStacks:this.siblingStacks.map(t=>new Map(t))}}restore(t){this._pathStringCache=null,this.path=t.path.map(t=>({...t})),this.siblingStacks=t.siblingStacks.map(t=>new Map(t))}readOnly(){return this._view}}class nt{constructor(t,e={},i){this.pattern=t,this.separator=e.separator||".",this.segments=this._parse(t),this.data=i,this._hasDeepWildcard=this.segments.some(t=>"deep-wildcard"===t.type),this._hasAttributeCondition=this.segments.some(t=>void 0!==t.attrName),this._hasPositionSelector=this.segments.some(t=>void 0!==t.position)}_parse(t){const e=[];let i=0,n="";for(;i<t.length;)t[i]===this.separator?i+1<t.length&&t[i+1]===this.separator?(n.trim()&&(e.push(this._parseSegment(n.trim())),n=""),e.push({type:"deep-wildcard"}),i+=2):(n.trim()&&e.push(this._parseSegment(n.trim())),n="",i++):(n+=t[i],i++);return n.trim()&&e.push(this._parseSegment(n.trim())),e}_parseSegment(t){const e={type:"tag"};let i=null,n=t;const r=t.match(/^([^\[]+)(\[[^\]]*\])(.*)$/);if(r&&(n=r[1]+r[3],r[2])){const t=r[2].slice(1,-1);t&&(i=t)}let s,o,a=n;if(n.includes("::")){const e=n.indexOf("::");if(s=n.substring(0,e).trim(),a=n.substring(e+2).trim(),!s)throw new Error(`Invalid namespace in pattern: ${t}`)}let l=null;if(a.includes(":")){const t=a.lastIndexOf(":"),e=a.substring(0,t).trim(),i=a.substring(t+1).trim();["first","last","odd","even"].includes(i)||/^nth\(\d+\)$/.test(i)?(o=e,l=i):o=a}else o=a;if(!o)throw new Error(`Invalid segment pattern: ${t}`);if(e.tag=o,s&&(e.namespace=s),i)if(i.includes("=")){const t=i.indexOf("=");e.attrName=i.substring(0,t).trim(),e.attrValue=i.substring(t+1).trim()}else e.attrName=i.trim();if(l){const t=l.match(/^nth\((\d+)\)$/);t?(e.position="nth",e.positionValue=parseInt(t[1],10)):e.position=l}return e}get length(){return this.segments.length}hasDeepWildcard(){return this._hasDeepWildcard}hasAttributeCondition(){return this._hasAttributeCondition}hasPositionSelector(){return this._hasPositionSelector}toString(){return this.pattern}}class rt{constructor(){this._byDepthAndTag=new Map,this._wildcardByDepth=new Map,this._deepWildcards=[],this._patterns=new Set,this._sealed=!1}add(t){if(this._sealed)throw new TypeError("ExpressionSet is sealed. Create a new ExpressionSet to add more expressions.");if(this._patterns.has(t.pattern))return this;if(this._patterns.add(t.pattern),t.hasDeepWildcard())return this._deepWildcards.push(t),this;const e=t.length,i=t.segments[t.segments.length-1],n=i?.tag;if(n&&"*"!==n){const i=`${e}:${n}`;this._byDepthAndTag.has(i)||this._byDepthAndTag.set(i,[]),this._byDepthAndTag.get(i).push(t)}else this._wildcardByDepth.has(e)||this._wildcardByDepth.set(e,[]),this._wildcardByDepth.get(e).push(t);return this}addAll(t){for(const e of t)this.add(e);return this}has(t){return this._patterns.has(t.pattern)}get size(){return this._patterns.size}seal(){return this._sealed=!0,this}get isSealed(){return this._sealed}matchesAny(t){return null!==this.findMatch(t)}findMatch(t){const e=t.getDepth(),i=`${e}:${t.getCurrentTag()}`,n=this._byDepthAndTag.get(i);if(n)for(let e=0;e<n.length;e++)if(t.matches(n[e]))return n[e];const r=this._wildcardByDepth.get(e);if(r)for(let e=0;e<r.length;e++)if(t.matches(r[e]))return r[e];for(let e=0;e<this._deepWildcards.length;e++)if(t.matches(this._deepWildcards[e]))return this._deepWildcards[e];return null}}const st={cent:"¢",pound:"£",curren:"¤",yen:"¥",euro:"€",dollar:"$",fnof:"ƒ",inr:"₹",af:"؋",birr:"ብር",peso:"₱",rub:"₽",won:"₩",yuan:"¥",cedil:"¸"},ot={amp:"&",apos:"'",gt:">",lt:"<",quot:'"'},at={nbsp:" ",copy:"©",reg:"®",trade:"™",mdash:"—",ndash:"–",hellip:"…",laquo:"«",raquo:"»",lsquo:"‘",rsquo:"’",ldquo:"“",rdquo:"”",bull:"•",para:"¶",sect:"§",deg:"°",frac12:"½",frac14:"¼",frac34:"¾"},lt=Object.freeze({ALLOW:"allow",BLOCK:"block",THROW:"throw"}),pt=new Set("!?\\\\/[]$%{}^&*()<>|+");function ct(t){if("#"===t[0])throw new Error(`[EntityReplacer] Invalid character '#' in entity name: "${t}"`);for(const e of t)if(pt.has(e))throw new Error(`[EntityReplacer] Invalid character '${e}' in entity name: "${t}"`);return t}function ht(...t){const e=Object.create(null);for(const i of t)if(i)for(const t of Object.keys(i)){const n=i[t];if("string"==typeof n)e[t]=n;else if(n&&"object"==typeof n&&void 0!==n.val){const i=n.val;"string"==typeof i&&(e[t]=i)}}return e}const dt="external",ut="base",ft="all",gt=Object.freeze({allow:0,leave:1,remove:2,throw:3}),mt=new Set([9,10,13]);class xt{constructor(t={}){var e;this._limit=t.limit||{},this._maxTotalExpansions=this._limit.maxTotalExpansions||0,this._maxExpandedLength=this._limit.maxExpandedLength||0,this._postCheck="function"==typeof t.postCheck?t.postCheck:t=>t,this._limitTiers=(e=this._limit.applyLimitsTo??dt)&&e!==dt?e===ft?new Set([ft]):e===ut?new Set([ut]):Array.isArray(e)?new Set(e):new Set([dt]):new Set([dt]),this._numericAllowed=t.numericAllowed??!0,this._baseMap=ht(ot,t.namedEntities||null),this._externalMap=Object.create(null),this._inputMap=Object.create(null),this._totalExpansions=0,this._expandedLength=0,this._removeSet=new Set(t.remove&&Array.isArray(t.remove)?t.remove:[]),this._leaveSet=new Set(t.leave&&Array.isArray(t.leave)?t.leave:[]);const i=function(t){if(!t)return{xmlVersion:1,onLevel:gt.allow,nullLevel:gt.remove};const e=1.1===t.xmlVersion?1.1:1,i=gt[t.onNCR]??gt.allow,n=gt[t.nullNCR]??gt.remove;return{xmlVersion:e,onLevel:i,nullLevel:Math.max(n,gt.remove)}}(t.ncr);this._ncrXmlVersion=i.xmlVersion,this._ncrOnLevel=i.onLevel,this._ncrNullLevel=i.nullLevel,this._onExternalEntity="function"==typeof t.onExternalEntity?t.onExternalEntity:null,this._onInputEntity="function"==typeof t.onInputEntity?t.onInputEntity:null}_applyRegistrationHook(t,e,i,n){if(!t)return!0;const r=t(e,i);if(r===lt.BLOCK)return!1;if(r===lt.THROW)throw new Error(`[EntityDecoder] Registration of ${n} entity "&${e};" was rejected by hook`);return!0}setExternalEntities(t){if(t)for(const e of Object.keys(t))ct(e);if(!this._onExternalEntity)return void(this._externalMap=ht(t));const e=ht(t),i=Object.create(null);for(const[t,n]of Object.entries(e))this._applyRegistrationHook(this._onExternalEntity,t,n,"external")&&(i[t]=n);this._externalMap=i}addExternalEntity(t,e){ct(t),"string"==typeof e&&-1===e.indexOf("&")&&this._applyRegistrationHook(this._onExternalEntity,t,e,"external")&&(this._externalMap[t]=e)}addInputEntities(t){if(this._totalExpansions=0,this._expandedLength=0,!this._onInputEntity)return void(this._inputMap=ht(t));const e=ht(t),i=Object.create(null);for(const[t,n]of Object.entries(e))this._applyRegistrationHook(this._onInputEntity,t,n,"input")&&(i[t]=n);this._inputMap=i}reset(){return this._inputMap=Object.create(null),this._totalExpansions=0,this._expandedLength=0,this}setXmlVersion(t){this._ncrXmlVersion=1.1===t?1.1:1}decode(t){if("string"!=typeof t||0===t.length)return t;if(-1===t.indexOf("&"))return t;const e=t,i=[],n=t.length;let r=0,s=0;const o=this._maxTotalExpansions>0,a=this._maxExpandedLength>0,l=o||a;for(;s<n;){if(38!==t.charCodeAt(s)){s++;continue}let e=s+1;for(;e<n&&59!==t.charCodeAt(e)&&e-s<=32;)e++;if(e>=n||59!==t.charCodeAt(e)){s++;continue}const p=t.slice(s+1,e);if(0===p.length){s++;continue}let c,h;if(this._removeSet.has(p))c="",void 0===h&&(h=dt);else{if(this._leaveSet.has(p)){s++;continue}if(35===p.charCodeAt(0)){const t=this._resolveNCR(p);if(void 0===t){s++;continue}c=t,h=ut}else{const t=this._resolveName(p);c=t?.value,h=t?.tier}}if(void 0!==c){if(s>r&&i.push(t.slice(r,s)),i.push(c),r=e+1,s=r,l&&this._tierCounts(h)){if(o&&(this._totalExpansions++,this._totalExpansions>this._maxTotalExpansions))throw new Error(`[EntityReplacer] Entity expansion count limit exceeded: ${this._totalExpansions} > ${this._maxTotalExpansions}`);if(a){const t=c.length-(p.length+2);if(t>0&&(this._expandedLength+=t,this._expandedLength>this._maxExpandedLength))throw new Error(`[EntityReplacer] Expanded content length limit exceeded: ${this._expandedLength} > ${this._maxExpandedLength}`)}}}else s++}r<n&&i.push(t.slice(r));const p=0===i.length?t:i.join("");return this._postCheck(p,e)}_tierCounts(t){return!!this._limitTiers.has(ft)||this._limitTiers.has(t)}_resolveName(t){return t in this._inputMap?{value:this._inputMap[t],tier:dt}:t in this._externalMap?{value:this._externalMap[t],tier:dt}:t in this._baseMap?{value:this._baseMap[t],tier:ut}:void 0}_classifyNCR(t){return 0===t?this._ncrNullLevel:t>=55296&&t<=57343||1===this._ncrXmlVersion&&t>=1&&t<=31&&!mt.has(t)?gt.remove:-1}_applyNCRAction(t,e,i){switch(t){case gt.allow:return String.fromCodePoint(i);case gt.remove:return"";case gt.leave:return;case gt.throw:throw new Error(`[EntityDecoder] Prohibited numeric character reference &${e}; (U+${i.toString(16).toUpperCase().padStart(4,"0")})`);default:return String.fromCodePoint(i)}}_resolveNCR(t){const e=t.charCodeAt(1);let i;if(i=120===e||88===e?parseInt(t.slice(2),16):parseInt(t.slice(1),10),Number.isNaN(i)||i<0||i>1114111)return;const n=this._classifyNCR(i);if(!this._numericAllowed&&n<gt.remove)return;const r=-1===n?this._ncrOnLevel:Math.max(this._ncrOnLevel,n);return this._applyNCRAction(r,t,i)}}const bt=[{id:"sql-block-comment-open",description:"SQL block comment open: /* ... */ — unusual in legitimate user text",pattern:/\/\*/},{id:"sql-union-select",description:"UNION SELECT — most common SQL injection aggregation attack",pattern:/\bUNION\s{1,20}(?:ALL\s{1,20})?SELECT\b/i},{id:"sql-drop-table",description:"DROP TABLE — destructive DDL injection",pattern:/\bDROP\s{1,20}TABLE\b/i},{id:"sql-drop-database",description:"DROP DATABASE — destructive DDL injection",pattern:/\bDROP\s{1,20}DATABASE\b/i},{id:"sql-insert-into",description:"INSERT INTO — data injection",pattern:/\bINSERT\s{1,20}INTO\b/i},{id:"sql-delete-from",description:"DELETE FROM — data deletion injection",pattern:/\bDELETE\s{1,20}FROM\b/i},{id:"sql-update-set",description:"UPDATE ... SET — data modification injection",pattern:/\bUPDATE\b[\s\S]{1,60}\bSET\b/i},{id:"sql-exec-xp",description:"EXEC xp_ — MSSQL extended stored procedure execution",pattern:/\bEXEC(?:UTE)?\s{1,20}xp_/i},{id:"sql-tautology-string",description:'Classic string tautology: \' OR \'1\'=\'1 or " OR "1"="1"',pattern:/'\s{0,10}OR\s{0,10}'[^']{0,20}'\s*=\s*'[^']{0,20}/i},{id:"sql-tautology-numeric",description:"Numeric tautology: OR 1=1",pattern:/\bOR\s{1,10}1\s*=\s*1\b/i},{id:"sql-always-true-zero",description:"Numeric tautology: OR 0=0",pattern:/\bOR\s{1,10}0\s*=\s*0\b/i},{id:"sql-sleep-benchmark",description:"Time-based blind injection: SLEEP() or BENCHMARK()",pattern:/\b(?:SLEEP|BENCHMARK)\s*\(/i},{id:"sql-waitfor-delay",description:"MSSQL time-based blind injection: WAITFOR DELAY",pattern:/\bWAITFOR\s{1,20}DELAY\b/i},{id:"sql-char-function",description:"CHAR() function — used to obfuscate injected strings",pattern:/\bCHAR\s*\(\s*\d{1,3}/i},{id:"sql-information-schema",description:"INFORMATION_SCHEMA — reconnaissance query for table/column enumeration",pattern:/\bINFORMATION_SCHEMA\b/i}],yt="[\"'\\s]*:",Nt={HTML:[{id:"html-script-open",description:"<script opening tag",pattern:/<script[\s>/]/i},{id:"html-script-close",description:"<\/script closing tag",pattern:/<\/script[\s>]/i},{id:"html-javascript-protocol",description:"javascript: URI scheme (with optional whitespace/encoding)",pattern:/j[\t\n\r ]*a[\t\n\r ]*v[\t\n\r ]*a[\t\n\r ]*s[\t\n\r ]*c[\t\n\r ]*r[\t\n\r ]*i[\t\n\r ]*p[\t\n\r ]*t[\t\n\r ]*:/i},{id:"html-vbscript-protocol",description:"vbscript: URI scheme",pattern:/vbscript[\t\n\r ]*:/i},{id:"html-data-html",description:"data:text/html URI — can execute scripts in browsers",pattern:/data[\t\n\r ]*:[\t\n\r ]*text\/html/i},{id:"html-data-xhtml",description:"data:application/xhtml+xml URI",pattern:/data[\t\n\r ]*:[\t\n\r ]*application\/xhtml/i},{id:"html-data-svg",description:"data:image/svg+xml URI — can execute scripts",pattern:/data[\t\n\r ]*:[\t\n\r ]*image\/svg\+xml/i},{id:"html-inline-event-handler",description:"Inline event handler attributes: onclick=, onerror=, onload=, etc.",pattern:/\bon\w{1,30}\s*=/i},{id:"html-entity-obfuscated-script",description:"HTML-entity-encoded <script (e.g. &#x3C;script or &lt;script)",pattern:/(?:&#x0*3[Cc];?|&#0*60;?|&lt;)\s*script/i},{id:"html-entity-obfuscated-javascript",description:'HTML-entity-encoded javascript: (partial — catches common &#106; or &#x6a; for "j")',pattern:/(?:&#x0*6[Aa];?|&#0*106;?)\s*(?:&#x0*61;?|a)[\s\S]{0,80}script\s*:/i},{id:"html-style-expression",description:"CSS expression() — IE-era code execution in style attributes",pattern:/style[\s\S]{0,20}expression\s*\(/i},{id:"html-object-embed",description:"<object or <embed tags that can load active content",pattern:/<(?:object|embed)[\s>/]/i},{id:"html-base-tag",description:"<base href= — can hijack all relative URLs on a page",pattern:/<base[\s>]/i},{id:"html-meta-refresh",description:'<meta http-equiv="refresh" — can redirect users',pattern:/<meta[\s\S]{0,40}http-equiv[\s\S]{0,20}refresh/i},{id:"html-srcdoc",description:"srcdoc= attribute on iframes — embeds HTML that can run scripts",pattern:/srcdoc\s*=/i},{id:"html-iframe",description:"<iframe tag",pattern:/<iframe[\s>/]/i},{id:"html-form",description:"<form tag — can be used for phishing / credential harvesting injection",pattern:/<form[\s>/]/i}],XML:[{id:"xml-cdata-injection",description:"CDATA section injection: <![CDATA[ breaks out of text node context",pattern:/<!\[CDATA\[/i},{id:"xml-cdata-close",description:"CDATA close sequence: ]]> can terminate an enclosing CDATA section",pattern:/\]\]>/},{id:"xml-processing-instruction",description:"XML processing instruction: <?xml-stylesheet or <?php etc.",pattern:/<\?(?:xml[\- ]|php|asp)/i},{id:"xml-doctype-injection",description:"DOCTYPE declaration embedded in content — can define entities",pattern:/<!DOCTYPE(?:[\s[]|$)/i},{id:"xml-entity-system",description:"SYSTEM keyword — used in external entity declarations (XXE)",pattern:/\bSYSTEM\s+["']/i},{id:"xml-entity-public",description:"PUBLIC keyword — used in external entity declarations (XXE)",pattern:/\bPUBLIC\s+["']/i},{id:"xml-entity-declaration",description:"<!ENTITY declaration — defines entities, potential XXE or entity expansion",pattern:/<!ENTITY[\s%]/i},{id:"xml-billion-laughs",description:"Entity reference chaining / billion laughs: repeated &eX; style references",pattern:/(?:&\w{1,20};){3,}/},{id:"xml-namespace-confusion",description:"xmlns: attribute injection — can redefine namespaces to confuse parsers",pattern:/\bxmlns\s*(?::\w{1,40})?\s*=/i},{id:"xml-comment-injection",description:"\x3c!-- comment injection — can hide content from some parsers",pattern:/<!--/},{id:"xml-comment-close",description:"--\x3e closes an enclosing XML comment",pattern:/-->/},{id:"xml-pi-close",description:"?> closes an enclosing processing instruction",pattern:/\?>/}],SVG:[{id:"svg-script-element",description:"<script element inside SVG executes JavaScript",pattern:/<script[\s>/]/i},{id:"svg-xlink-href-javascript",description:"xlink:href with javascript: — classic SVG XSS via <a> or <use>",pattern:/xlink\s*:\s*href\s*=\s*["']?\s*javascript\s*:/i},{id:"svg-href-javascript",description:"href= with javascript: in SVG context (<a>, <animate>, etc.)",pattern:/href\s*=\s*["']?\s*javascript\s*:/i},{id:"svg-foreignobject",description:"<foreignObject embeds HTML inside SVG — can execute scripts",pattern:/<foreignObject[\s>/]/i},{id:"svg-use-external",description:"<use xlink:href or href pointing to external resource (non-fragment URL)",pattern:/<use[\s\S]{0,60}(?:xlink\s*:\s*)?href\s*=\s*(?:["'][^#]|[^"'#\s>])/i},{id:"svg-animate-href",description:'<animate attributeName="href" — can dynamically change href to javascript:',pattern:/<animate[\s\S]{0,80}attributeName\s*=\s*["'][\s]*href["']/i},{id:"svg-animate-xlinkhref",description:'<animate attributeName="xlink:href"',pattern:/<animate[\s\S]{0,80}attributeName\s*=\s*["'][\s]*xlink\s*:\s*href["']/i},{id:"svg-set-javascript",description:'<set to="javascript:..." — sets an attribute to a javascript: URI',pattern:/<set[\s\S]{0,80}to\s*=\s*["']?\s*javascript\s*:/i},{id:"svg-event-handler",description:"SVG-specific event handler attributes: onload=, onerror=, onactivate=, etc.",pattern:/\bon(?:load|error|activate|begin|end|repeat|focus|blur|click|mouse\w{1,20}|key\w{1,20})\s*=/i},{id:"svg-handler-generic",description:"Generic on* handler catch-all for SVG attributes",pattern:/\bon\w{1,30}\s*=/i},{id:"svg-filter-feimage",description:"<feImage href= — filter primitive that can load external resources",pattern:/<feImage[\s\S]{0,80}(?:xlink\s*:\s*)?href\s*=/i},{id:"svg-image-external",description:"<image xlink:href with http/https or javascript protocol",pattern:/<image[\s\S]{0,80}(?:xlink\s*:\s*)?href\s*=\s*["']?\s*(?:https?|javascript)\s*:/i},{id:"svg-style-javascript",description:"style= attribute containing javascript: (e.g. background:url(javascript:...))",pattern:/style\s*=[\s\S]{0,60}javascript\s*:/i}],SQL:bt,"SQL-STRICT":[...bt,{id:"sql-line-comment",description:"SQL line comment: -- followed by whitespace or end of string",pattern:/--(?:\s|$)/},{id:"sql-stacked-query",description:"Stacked queries: semicolon immediately followed by a SQL keyword",pattern:/;\s{0,10}(?:SELECT|INSERT|UPDATE|DELETE|DROP|CREATE|ALTER|EXEC)\b/i},{id:"sql-hex-encoding",description:"Hex-encoded string injection: 0x41414141 style (MySQL)",pattern:/\b0x[0-9a-f]{4,}/i}],SHELL:[{id:"shell-path-traversal-unix",description:"Unix path traversal: ../  — climbing the directory tree",pattern:/\.\.\//},{id:"shell-path-traversal-windows",description:"Windows path traversal: ..\\ — climbing the directory tree",pattern:/\.\.\\/},{id:"shell-path-traversal-encoded",description:"URL-encoded path traversal: %2e%2e or %2f variants",pattern:/%2e%2e|%2f\.\.|\.\.%2f/i},{id:"shell-null-byte",description:"Null byte injection: \\x00 or %00 — truncates strings in C-backed functions",pattern:/\x00|%00/},{id:"shell-semicolon",description:"Semicolon command separator: cmd1; cmd2",pattern:/;/},{id:"shell-pipe",description:"Pipe operator: cmd1 | cmd2",pattern:/\|/},{id:"shell-and-operator",description:"AND operator: cmd1 && cmd2",pattern:/&&/},{id:"shell-or-operator",description:"OR operator: cmd1 || cmd2",pattern:/\|\|/},{id:"shell-backtick",description:"Backtick command substitution: `cmd`",pattern:/`/},{id:"shell-dollar-paren",description:"Dollar-paren command substitution: $(cmd)",pattern:/\$\(/},{id:"shell-dollar-brace",description:"Dollar-brace variable expansion: ${var} — can be abused for injection",pattern:/\$\{/},{id:"shell-redirect-out",description:"Output redirection: cmd > file or cmd >> file",pattern:/>{1,2}/},{id:"shell-redirect-in",description:"Input redirection: cmd < file",pattern:/</},{id:"shell-newline-injection",description:"Newline injection: \\n or \\r — can inject new shell commands",pattern:/[\n\r]/},{id:"shell-glob-star",description:"Glob expansion: * or ? — can expand to unintended files",pattern:/[/\\][*?]/},{id:"shell-absolute-root",description:"Absolute root path injection: string starting with / or \\ (Windows UNC)",pattern:/^(?:\/|\\\\)/},{id:"shell-windows-drive",description:"Windows drive letter path injection: C:\\ or D:/",pattern:/^[a-zA-Z]:[/\\]/},{id:"shell-curl-wget",description:"curl/wget with URL or flags — can exfiltrate data or download payloads",pattern:/\b(?:curl|wget)\s+(?:https?:\/\/|ftp:\/\/|-)/i}],REDOS:[{id:"redos-nested-quantifier-plus",description:"Nested + quantifier inside a group with outer quantifier: (a+)+, (.+b)*, etc.",pattern:/\([^)]*\+[^)]*\)[+*]/},{id:"redos-nested-quantifier-star",description:"Nested * quantifier: (a*)* or (a*)+ — catastrophic backtracking",pattern:/\([^)]*\*[^)]*\)[*+]/},{id:"redos-nested-groups",description:"Doubly nested quantified groups: ((a+)+) — guaranteed catastrophic",pattern:/\(\([^)]{0,40}\)[+*]\)[+*]/},{id:"redos-alternation-overlap",description:"Overlapping alternation under quantifier: (a|a)+ — ambiguous NFA paths",pattern:/\(([^|()]{1,20})\|(?:\1)(?:\|[^|()]{1,20}){0,5}\)[+*?]{1,2}/},{id:"redos-star-plus-concat",description:"(x*x)+ pattern — triggers super-linear backtracking",pattern:/\([^)]{0,10}\*[^)]{0,10}\)[+*]/},{id:"redos-dot-star-greedy",description:"(.*){n,} or (.+){n,} — repeated greedy dot quantifiers",pattern:/\(\.[*+]\)\{?\d/},{id:"redos-large-repetition",description:"Very large fixed or range repetition count {1000,} or {1000,n} — denial of service via backtracking",pattern:/\{\d{4,}(?:,\d*)?\}/},{id:"redos-catastrophic-alternation",description:"Long alternation with many similar branches — polynomial backtracking risk",pattern:/\([^)]{0,200}(?:\|[^|)]{0,50}){9,}\)/}],NOSQL:[{id:"nosql-where-operator",description:"$where — executes arbitrary JavaScript server-side in MongoDB",pattern:new RegExp(`\\$where${yt}`,"i")},{id:"nosql-ne-operator",description:'$ne — "not equal" operator used to bypass equality checks',pattern:new RegExp(`\\$ne${yt}`,"i")},{id:"nosql-gt-operator",description:'$gt — "greater than" used to bypass password/value checks',pattern:new RegExp(`\\$gte?${yt}`,"i")},{id:"nosql-lt-operator",description:'$lt / $lte — "less than" bypass variants',pattern:new RegExp(`\\$lte?${yt}`,"i")},{id:"nosql-regex-operator",description:"$regex — can be used to extract data character by character (blind injection)",pattern:new RegExp(`\\$regex${yt}`,"i")},{id:"nosql-or-operator",description:"$or — logical OR; used to create always-true conditions",pattern:new RegExp(`\\$or${yt}\\s*\\[`,"i")},{id:"nosql-and-operator",description:"$and — logical AND operator injection",pattern:new RegExp(`\\$and${yt}\\s*\\[`,"i")},{id:"nosql-nor-operator",description:"$nor — logical NOR operator injection",pattern:new RegExp(`\\$nor${yt}\\s*\\[`,"i")},{id:"nosql-exists-operator",description:"$exists — can enumerate fields to determine schema",pattern:new RegExp(`\\$exists${yt}`,"i")},{id:"nosql-in-operator",description:"$in — matches any value in a list; can enumerate values",pattern:new RegExp(`\\$in${yt}\\s*\\[`,"i")},{id:"nosql-expr-operator",description:"$expr — allows aggregation expressions in queries (MongoDB 3.6+)",pattern:new RegExp(`\\$expr${yt}`,"i")},{id:"nosql-function-operator",description:"$function — executes arbitrary JavaScript in MongoDB 4.4+",pattern:new RegExp(`\\$function${yt}`,"i")},{id:"nosql-accumulator-operator",description:"$accumulator — custom aggregation with arbitrary JS execution",pattern:new RegExp(`\\$accumulator${yt}`,"i")},{id:"nosql-proto-pollution",description:"__proto__ — prototype pollution via object key injection",pattern:/__proto__/},{id:"nosql-constructor-prototype",description:"constructor.prototype — alternative prototype pollution vector (dot notation or JSON key)",pattern:/constructor[\s"':.,{\[]*prototype/i},{id:"nosql-proto-bracket",description:'["__proto__"] — bracket-notation prototype pollution',pattern:/\[["']__proto__["']\]/}],LOG:[{id:"log-crlf-injection",description:"CRLF injection: literal \\r or \\n embeds fake log lines",pattern:/[\r\n]/},{id:"log-url-encoded-crlf",description:"URL-encoded CRLF: %0d, %0a, %0D, %0A — decoded by some log parsers",pattern:/%0[dDaA]/},{id:"log-unicode-newline",description:"Unicode newline variants: U+2028 (line separator), U+2029 (paragraph separator)",pattern:/[\u2028\u2029]/},{id:"log-log4shell-jndi",description:"Log4Shell: ${jndi:...} triggers remote code execution in Apache Log4j",pattern:/\$\{jndi\s*:/i},{id:"log-log4shell-obfuscated",description:"Obfuscated Log4Shell: ${::-j}... lookup-bypass prefix used to evade WAF detection",pattern:/\$\{::-/},{id:"log-log4j-lookup",description:"Log4j lookup syntax: ${env:...}, ${sys:...}, ${ctx:...} — data exfiltration",pattern:/\$\{(?:env|sys|ctx|main|map|sd|web|docker|k8s|spring)\s*:/i},{id:"log-ssti-double-brace",description:"SSTI double-brace: {{expression}} — Jinja2, Twig, Handlebars, etc.",pattern:/\{\{[\s\S]{0,80}\}\}/},{id:"log-ssti-hash-brace",description:"SSTI hash-brace: #{expression} — Thymeleaf, Velocity, Ruby ERB",pattern:/#\{[\s\S]{0,80}\}/},{id:"log-ssti-dollar-brace",description:"SSTI/EL injection: ${expression with operators or method calls} — JSP EL, Freemarker, SpEL",pattern:/\$\{[^}]*(?:\.|\(|\*|\+|\bclass\b|\bruntime\b|\bprocess\b|\bexec\b)[^}]{0,80}\}/i},{id:"log-ssti-percent-tag",description:"SSTI ERB/ASP tag: <%= expression %> — Ruby ERB, ASP",pattern:/<%=[\s\S]{0,80}%>/},{id:"log-null-byte",description:"Null byte: \\x00 or %00 — can truncate log entries in C-backed loggers",pattern:/\x00|%00/},{id:"log-ansi-escape",description:"ANSI escape sequence: ESC[ — can manipulate terminal output when logs are tailed",pattern:/\x1b\[/}]},Et=Nt,wt=Object.freeze(Object.fromEntries(Object.keys(Nt).map(t=>[t,t])));function vt(t,e){const i=Et[e];for(const n of i)if(n.pattern.test(t))return{context:e,id:n.id,description:n.description,pattern:n.pattern};return null}function St(t,e){if(function(t){if("string"!=typeof t)throw new TypeError("is-unsafe: first argument must be a string, got "+typeof t)}(t),function(t){if(!(t instanceof RegExp))if("string"!=typeof t){if(!Array.isArray(t))throw new TypeError("is-unsafe: second argument must be a context string, array of context strings, or RegExp. 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