├── LICENSE ├── Makefile ├── README.md ├── docs ├── index.html ├── index.js └── index.wasm └── src ├── challenge_shell.html └── main.c /LICENSE: -------------------------------------------------------------------------------- 1 | BSD 3-Clause License 2 | 3 | Copyright (c) 2019, Jacob Baines 4 | All rights reserved. 5 | 6 | Redistribution and use in source and binary forms, with or without 7 | modification, are permitted provided that the following conditions are met: 8 | 9 | 1. Redistributions of source code must retain the above copyright notice, this 10 | list of conditions and the following disclaimer. 11 | 12 | 2. Redistributions in binary form must reproduce the above copyright notice, 13 | this list of conditions and the following disclaimer in the documentation 14 | and/or other materials provided with the distribution. 15 | 16 | 3. Neither the name of the copyright holder nor the names of its 17 | contributors may be used to endorse or promote products derived from 18 | this software without specific prior written permission. 19 | 20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 24 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 27 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 | OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | CC=emcc 2 | OUTPUT_FOLDER=./build 3 | 4 | build: 5 | mkdir $(OUTPUT_FOLDER) 6 | $(CC) ./src/main.c -O3 -s WASM=1 -o $(OUTPUT_FOLDER)/index.html --shell-file ./src/challenge_shell.html -s NO_EXIT_RUNTIME=1 -s LINKABLE=1 -s EXTRA_EXPORTED_RUNTIME_METHODS='["ccall"]' 7 | wasm2wat $(OUTPUT_FOLDER)/index.wasm -o $(OUTPUT_FOLDER)/index.wat 8 | truncate -s -2 $(OUTPUT_FOLDER)/index.wat 9 | echo "\n(start 33))" >> $(OUTPUT_FOLDER)/index.wat 10 | wat2wasm $(OUTPUT_FOLDER)/index.wat -o $(OUTPUT_FOLDER)/index.wasm 11 | 12 | clean: 13 | rm -rf $(OUTPUT_FOLDER)/ 14 | 15 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # WASM Challenge 2 | A simple to moderate WebAssembly focused CTF challenge. The user needs to enter the correct seven digit combinition to "win." The challenge can be played here: 3 | 4 | * https://jacob-baines.github.io/wasm_challenge/ 5 | 6 | I also wrote up a few thoughts on writing the challenge here: 7 | 8 | * https://medium.com/tenable-techblog/coding-a-webassembly-ctf-challenge-5560576e9cb7 9 | -------------------------------------------------------------------------------- /docs/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | lol 7 | 13 | 14 | 15 |
16 |
17 | Instructions:
18 | Enter the correct 7 digit combination and win! 19 |
20 |

21 |

22 | 23 | 24 | 25 |
26 |
27 | 28 | 29 | 30 |
31 |
32 | 33 | 34 | 35 |
36 |
37 | 38 |
39 |
40 |

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method="native-wasm";var wasmTextFile="index.wast";var wasmBinaryFile="index.wasm";var asmjsCodeFile="index.temp.asm.js";if(!isDataURI(wasmTextFile)){wasmTextFile=locateFile(wasmTextFile)}if(!isDataURI(wasmBinaryFile)){wasmBinaryFile=locateFile(wasmBinaryFile)}if(!isDataURI(asmjsCodeFile)){asmjsCodeFile=locateFile(asmjsCodeFile)}var wasmPageSize=64*1024;var info={"global":null,"env":null,"asm2wasm":asm2wasmImports,"parent":Module};var exports=null;function mergeMemory(newBuffer){var oldBuffer=Module["buffer"];if(newBuffer.byteLength>2]=value;return value}function _clock_gettime(clk_id,tp){var now;if(clk_id===0){now=Date.now()}else if(clk_id===1&&_emscripten_get_now_is_monotonic()){now=_emscripten_get_now()}else{___setErrNo(ERRNO_CODES.EINVAL);return-1}HEAP32[tp>>2]=now/1e3|0;HEAP32[tp+4>>2]=now%1e3*1e3*1e3|0;return 0}function ___clock_gettime(){return _clock_gettime.apply(null,arguments)}function ___lock(){}function ___map_file(pathname,size){___setErrNo(ERRNO_CODES.EPERM);return-1}var ERRNO_MESSAGES={0:"Success",1:"Not super-user",2:"No such file or directory",3:"No such process",4:"Interrupted system call",5:"I/O error",6:"No such device or address",7:"Arg list too long",8:"Exec format error",9:"Bad file number",10:"No children",11:"No more processes",12:"Not enough core",13:"Permission denied",14:"Bad address",15:"Block device required",16:"Mount device busy",17:"File exists",18:"Cross-device link",19:"No such device",20:"Not a directory",21:"Is a directory",22:"Invalid argument",23:"Too many open files in system",24:"Too many open files",25:"Not a typewriter",26:"Text file busy",27:"File too large",28:"No space left on device",29:"Illegal seek",30:"Read only file system",31:"Too many links",32:"Broken pipe",33:"Math arg out of domain of func",34:"Math result not representable",35:"File locking deadlock error",36:"File or path name too long",37:"No record locks available",38:"Function not implemented",39:"Directory not empty",40:"Too many symbolic links",42:"No message of desired type",43:"Identifier removed",44:"Channel number out of range",45:"Level 2 not synchronized",46:"Level 3 halted",47:"Level 3 reset",48:"Link number out of range",49:"Protocol driver not attached",50:"No CSI structure available",51:"Level 2 halted",52:"Invalid exchange",53:"Invalid request descriptor",54:"Exchange full",55:"No anode",56:"Invalid request code",57:"Invalid slot",59:"Bad font file fmt",60:"Device not a stream",61:"No data (for no delay io)",62:"Timer expired",63:"Out of streams resources",64:"Machine is not on the network",65:"Package not installed",66:"The object is remote",67:"The link has been severed",68:"Advertise error",69:"Srmount error",70:"Communication error on send",71:"Protocol error",72:"Multihop attempted",73:"Cross mount point (not really error)",74:"Trying to read unreadable message",75:"Value too large for defined data type",76:"Given log. name not unique",77:"f.d. invalid for this operation",78:"Remote address changed",79:"Can access a needed shared lib",80:"Accessing a corrupted shared lib",81:".lib section in a.out corrupted",82:"Attempting to link in too many libs",83:"Attempting to exec a shared library",84:"Illegal byte sequence",86:"Streams pipe error",87:"Too many users",88:"Socket operation on non-socket",89:"Destination address required",90:"Message too long",91:"Protocol wrong type for socket",92:"Protocol not available",93:"Unknown protocol",94:"Socket type not supported",95:"Not supported",96:"Protocol family not supported",97:"Address family not supported by protocol family",98:"Address already in use",99:"Address not available",100:"Network interface is not configured",101:"Network is unreachable",102:"Connection reset by network",103:"Connection aborted",104:"Connection reset by peer",105:"No buffer space available",106:"Socket is already connected",107:"Socket is not connected",108:"Can't send after socket shutdown",109:"Too many references",110:"Connection timed out",111:"Connection refused",112:"Host is down",113:"Host is unreachable",114:"Socket already connected",115:"Connection already in progress",116:"Stale file handle",122:"Quota exceeded",123:"No medium (in tape drive)",125:"Operation canceled",130:"Previous owner died",131:"State not recoverable"};var PATH={splitPath:(function(filename){var splitPathRe=/^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;return splitPathRe.exec(filename).slice(1)}),normalizeArray:(function(parts,allowAboveRoot){var up=0;for(var i=parts.length-1;i>=0;i--){var last=parts[i];if(last==="."){parts.splice(i,1)}else if(last===".."){parts.splice(i,1);up++}else if(up){parts.splice(i,1);up--}}if(allowAboveRoot){for(;up;up--){parts.unshift("..")}}return parts}),normalize:(function(path){var isAbsolute=path.charAt(0)==="/",trailingSlash=path.substr(-1)==="/";path=PATH.normalizeArray(path.split("/").filter((function(p){return!!p})),!isAbsolute).join("/");if(!path&&!isAbsolute){path="."}if(path&&trailingSlash){path+="/"}return(isAbsolute?"/":"")+path}),dirname:(function(path){var result=PATH.splitPath(path),root=result[0],dir=result[1];if(!root&&!dir){return"."}if(dir){dir=dir.substr(0,dir.length-1)}return root+dir}),basename:(function(path){if(path==="/")return"/";var lastSlash=path.lastIndexOf("/");if(lastSlash===-1)return path;return path.substr(lastSlash+1)}),extname:(function(path){return PATH.splitPath(path)[3]}),join:(function(){var paths=Array.prototype.slice.call(arguments,0);return PATH.normalize(paths.join("/"))}),join2:(function(l,r){return PATH.normalize(l+"/"+r)}),resolve:(function(){var resolvedPath="",resolvedAbsolute=false;for(var i=arguments.length-1;i>=-1&&!resolvedAbsolute;i--){var path=i>=0?arguments[i]:FS.cwd();if(typeof path!=="string"){throw new TypeError("Arguments to path.resolve must be strings")}else if(!path){return""}resolvedPath=path+"/"+resolvedPath;resolvedAbsolute=path.charAt(0)==="/"}resolvedPath=PATH.normalizeArray(resolvedPath.split("/").filter((function(p){return!!p})),!resolvedAbsolute).join("/");return(resolvedAbsolute?"/":"")+resolvedPath||"."}),relative:(function(from,to){from=PATH.resolve(from).substr(1);to=PATH.resolve(to).substr(1);function trim(arr){var start=0;for(;start=0;end--){if(arr[end]!=="")break}if(start>end)return[];return arr.slice(start,end-start+1)}var fromParts=trim(from.split("/"));var toParts=trim(to.split("/"));var length=Math.min(fromParts.length,toParts.length);var samePartsLength=length;for(var i=0;i0){result=buf.slice(0,bytesRead).toString("utf-8")}else{result=null}}else if(typeof window!="undefined"&&typeof window.prompt=="function"){result=window.prompt("Input: ");if(result!==null){result+="\n"}}else if(typeof readline=="function"){result=readline();if(result!==null){result+="\n"}}if(!result){return null}tty.input=intArrayFromString(result,true)}return tty.input.shift()}),put_char:(function(tty,val){if(val===null||val===10){out(UTF8ArrayToString(tty.output,0));tty.output=[]}else{if(val!=0)tty.output.push(val)}}),flush:(function(tty){if(tty.output&&tty.output.length>0){out(UTF8ArrayToString(tty.output,0));tty.output=[]}})},default_tty1_ops:{put_char:(function(tty,val){if(val===null||val===10){err(UTF8ArrayToString(tty.output,0));tty.output=[]}else{if(val!=0)tty.output.push(val)}}),flush:(function(tty){if(tty.output&&tty.output.length>0){err(UTF8ArrayToString(tty.output,0));tty.output=[]}})}};var MEMFS={ops_table:null,mount:(function(mount){return MEMFS.createNode(null,"/",16384|511,0)}),createNode:(function(parent,name,mode,dev){if(FS.isBlkdev(mode)||FS.isFIFO(mode)){throw new FS.ErrnoError(ERRNO_CODES.EPERM)}if(!MEMFS.ops_table){MEMFS.ops_table={dir:{node:{getattr:MEMFS.node_ops.getattr,setattr:MEMFS.node_ops.setattr,lookup:MEMFS.node_ops.lookup,mknod:MEMFS.node_ops.mknod,rename:MEMFS.node_ops.rename,unlink:MEMFS.node_ops.unlink,rmdir:MEMFS.node_ops.rmdir,readdir:MEMFS.node_ops.readdir,symlink:MEMFS.node_ops.symlink},stream:{llseek:MEMFS.stream_ops.llseek}},file:{node:{getattr:MEMFS.node_ops.getattr,setattr:MEMFS.node_ops.setattr},stream:{llseek:MEMFS.stream_ops.llseek,read:MEMFS.stream_ops.read,write:MEMFS.stream_ops.write,allocate:MEMFS.stream_ops.allocate,mmap:MEMFS.stream_ops.mmap,msync:MEMFS.stream_ops.msync}},link:{node:{getattr:MEMFS.node_ops.getattr,setattr:MEMFS.node_ops.setattr,readlink:MEMFS.node_ops.readlink},stream:{}},chrdev:{node:{getattr:MEMFS.node_ops.getattr,setattr:MEMFS.node_ops.setattr},stream:FS.chrdev_stream_ops}}}var node=FS.createNode(parent,name,mode,dev);if(FS.isDir(node.mode)){node.node_ops=MEMFS.ops_table.dir.node;node.stream_ops=MEMFS.ops_table.dir.stream;node.contents={}}else if(FS.isFile(node.mode)){node.node_ops=MEMFS.ops_table.file.node;node.stream_ops=MEMFS.ops_table.file.stream;node.usedBytes=0;node.contents=null}else if(FS.isLink(node.mode)){node.node_ops=MEMFS.ops_table.link.node;node.stream_ops=MEMFS.ops_table.link.stream}else if(FS.isChrdev(node.mode)){node.node_ops=MEMFS.ops_table.chrdev.node;node.stream_ops=MEMFS.ops_table.chrdev.stream}node.timestamp=Date.now();if(parent){parent.contents[name]=node}return node}),getFileDataAsRegularArray:(function(node){if(node.contents&&node.contents.subarray){var arr=[];for(var i=0;inode.contents.length){node.contents=MEMFS.getFileDataAsRegularArray(node);node.usedBytes=node.contents.length}if(!node.contents||node.contents.subarray){var prevCapacity=node.contents?node.contents.length:0;if(prevCapacity>=newCapacity)return;var CAPACITY_DOUBLING_MAX=1024*1024;newCapacity=Math.max(newCapacity,prevCapacity*(prevCapacity0)node.contents.set(oldContents.subarray(0,node.usedBytes),0);return}if(!node.contents&&newCapacity>0)node.contents=[];while(node.contents.lengthnewSize)node.contents.length=newSize;else while(node.contents.length=stream.node.usedBytes)return 0;var size=Math.min(stream.node.usedBytes-position,length);assert(size>=0);if(size>8&&contents.subarray){buffer.set(contents.subarray(position,position+size),offset)}else{for(var i=0;i0||position+lengthe2.timestamp){create.push(key);total++}}));var remove=[];Object.keys(dst.entries).forEach((function(key){var e=dst.entries[key];var e2=src.entries[key];if(!e2){remove.push(key);total++}}));if(!total){return callback(null)}var errored=false;var completed=0;var db=src.type==="remote"?src.db:dst.db;var transaction=db.transaction([IDBFS.DB_STORE_NAME],"readwrite");var store=transaction.objectStore(IDBFS.DB_STORE_NAME);function done(err){if(err){if(!done.errored){done.errored=true;return callback(err)}return}if(++completed>=total){return callback(null)}}transaction.onerror=(function(e){done(this.error);e.preventDefault()});create.sort().forEach((function(path){if(dst.type==="local"){IDBFS.loadRemoteEntry(store,path,(function(err,entry){if(err)return done(err);IDBFS.storeLocalEntry(path,entry,done)}))}else{IDBFS.loadLocalEntry(path,(function(err,entry){if(err)return done(err);IDBFS.storeRemoteEntry(store,path,entry,done)}))}}));remove.sort().reverse().forEach((function(path){if(dst.type==="local"){IDBFS.removeLocalEntry(path,done)}else{IDBFS.removeRemoteEntry(store,path,done)}}))})};var NODEFS={isWindows:false,staticInit:(function(){NODEFS.isWindows=!!process.platform.match(/^win/);var flags=process["binding"]("constants");if(flags["fs"]){flags=flags["fs"]}NODEFS.flagsForNodeMap={"1024":flags["O_APPEND"],"64":flags["O_CREAT"],"128":flags["O_EXCL"],"0":flags["O_RDONLY"],"2":flags["O_RDWR"],"4096":flags["O_SYNC"],"512":flags["O_TRUNC"],"1":flags["O_WRONLY"]}}),bufferFrom:(function(arrayBuffer){return Buffer.alloc?Buffer.from(arrayBuffer):new Buffer(arrayBuffer)}),mount:(function(mount){assert(ENVIRONMENT_IS_NODE);return NODEFS.createNode(null,"/",NODEFS.getMode(mount.opts.root),0)}),createNode:(function(parent,name,mode,dev){if(!FS.isDir(mode)&&!FS.isFile(mode)&&!FS.isLink(mode)){throw new FS.ErrnoError(ERRNO_CODES.EINVAL)}var node=FS.createNode(parent,name,mode);node.node_ops=NODEFS.node_ops;node.stream_ops=NODEFS.stream_ops;return node}),getMode:(function(path){var stat;try{stat=fs.lstatSync(path);if(NODEFS.isWindows){stat.mode=stat.mode|(stat.mode&292)>>2}}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}return stat.mode}),realPath:(function(node){var parts=[];while(node.parent!==node){parts.push(node.name);node=node.parent}parts.push(node.mount.opts.root);parts.reverse();return PATH.join.apply(null,parts)}),flagsForNode:(function(flags){flags&=~2097152;flags&=~2048;flags&=~32768;flags&=~524288;var newFlags=0;for(var k in NODEFS.flagsForNodeMap){if(flags&k){newFlags|=NODEFS.flagsForNodeMap[k];flags^=k}}if(!flags){return newFlags}else{throw new FS.ErrnoError(ERRNO_CODES.EINVAL)}}),node_ops:{getattr:(function(node){var path=NODEFS.realPath(node);var stat;try{stat=fs.lstatSync(path)}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}if(NODEFS.isWindows&&!stat.blksize){stat.blksize=4096}if(NODEFS.isWindows&&!stat.blocks){stat.blocks=(stat.size+stat.blksize-1)/stat.blksize|0}return{dev:stat.dev,ino:stat.ino,mode:stat.mode,nlink:stat.nlink,uid:stat.uid,gid:stat.gid,rdev:stat.rdev,size:stat.size,atime:stat.atime,mtime:stat.mtime,ctime:stat.ctime,blksize:stat.blksize,blocks:stat.blocks}}),setattr:(function(node,attr){var path=NODEFS.realPath(node);try{if(attr.mode!==undefined){fs.chmodSync(path,attr.mode);node.mode=attr.mode}if(attr.timestamp!==undefined){var date=new Date(attr.timestamp);fs.utimesSync(path,date,date)}if(attr.size!==undefined){fs.truncateSync(path,attr.size)}}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),lookup:(function(parent,name){var path=PATH.join2(NODEFS.realPath(parent),name);var mode=NODEFS.getMode(path);return NODEFS.createNode(parent,name,mode)}),mknod:(function(parent,name,mode,dev){var node=NODEFS.createNode(parent,name,mode,dev);var path=NODEFS.realPath(node);try{if(FS.isDir(node.mode)){fs.mkdirSync(path,node.mode)}else{fs.writeFileSync(path,"",{mode:node.mode})}}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}return node}),rename:(function(oldNode,newDir,newName){var oldPath=NODEFS.realPath(oldNode);var newPath=PATH.join2(NODEFS.realPath(newDir),newName);try{fs.renameSync(oldPath,newPath)}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),unlink:(function(parent,name){var path=PATH.join2(NODEFS.realPath(parent),name);try{fs.unlinkSync(path)}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),rmdir:(function(parent,name){var path=PATH.join2(NODEFS.realPath(parent),name);try{fs.rmdirSync(path)}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),readdir:(function(node){var path=NODEFS.realPath(node);try{return fs.readdirSync(path)}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),symlink:(function(parent,newName,oldPath){var newPath=PATH.join2(NODEFS.realPath(parent),newName);try{fs.symlinkSync(oldPath,newPath)}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),readlink:(function(node){var path=NODEFS.realPath(node);try{path=fs.readlinkSync(path);path=NODEJS_PATH.relative(NODEJS_PATH.resolve(node.mount.opts.root),path);return path}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}})},stream_ops:{open:(function(stream){var path=NODEFS.realPath(stream.node);try{if(FS.isFile(stream.node.mode)){stream.nfd=fs.openSync(path,NODEFS.flagsForNode(stream.flags))}}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),close:(function(stream){try{if(FS.isFile(stream.node.mode)&&stream.nfd){fs.closeSync(stream.nfd)}}catch(e){if(!e.code)throw e;throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),read:(function(stream,buffer,offset,length,position){if(length===0)return 0;try{return fs.readSync(stream.nfd,NODEFS.bufferFrom(buffer.buffer),offset,length,position)}catch(e){throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),write:(function(stream,buffer,offset,length,position){try{return fs.writeSync(stream.nfd,NODEFS.bufferFrom(buffer.buffer),offset,length,position)}catch(e){throw new FS.ErrnoError(ERRNO_CODES[e.code])}}),llseek:(function(stream,offset,whence){var position=offset;if(whence===1){position+=stream.position}else if(whence===2){if(FS.isFile(stream.node.mode)){try{var stat=fs.fstatSync(stream.nfd);position+=stat.size}catch(e){throw new FS.ErrnoError(ERRNO_CODES[e.code])}}}if(position<0){throw new FS.ErrnoError(ERRNO_CODES.EINVAL)}return position})}};var WORKERFS={DIR_MODE:16895,FILE_MODE:33279,reader:null,mount:(function(mount){assert(ENVIRONMENT_IS_WORKER);if(!WORKERFS.reader)WORKERFS.reader=new FileReaderSync;var root=WORKERFS.createNode(null,"/",WORKERFS.DIR_MODE,0);var createdParents={};function ensureParent(path){var parts=path.split("/");var parent=root;for(var i=0;i=stream.node.size)return 0;var chunk=stream.node.contents.slice(position,position+length);var ab=WORKERFS.reader.readAsArrayBuffer(chunk);buffer.set(new Uint8Array(ab),offset);return chunk.size}),write:(function(stream,buffer,offset,length,position){throw new FS.ErrnoError(ERRNO_CODES.EIO)}),llseek:(function(stream,offset,whence){var position=offset;if(whence===1){position+=stream.position}else if(whence===2){if(FS.isFile(stream.node.mode)){position+=stream.node.size}}if(position<0){throw new FS.ErrnoError(ERRNO_CODES.EINVAL)}return position})}};var _stdin=STATICTOP;STATICTOP+=16;var _stdout=STATICTOP;STATICTOP+=16;var _stderr=STATICTOP;STATICTOP+=16;var FS={root:null,mounts:[],devices:{},streams:[],nextInode:1,nameTable:null,currentPath:"/",initialized:false,ignorePermissions:true,trackingDelegate:{},tracking:{openFlags:{READ:1,WRITE:2}},ErrnoError:null,genericErrors:{},filesystems:null,syncFSRequests:0,handleFSError:(function(e){if(!(e instanceof FS.ErrnoError))throw e+" : "+stackTrace();return ___setErrNo(e.errno)}),lookupPath:(function(path,opts){path=PATH.resolve(FS.cwd(),path);opts=opts||{};if(!path)return{path:"",node:null};var defaults={follow_mount:true,recurse_count:0};for(var key in defaults){if(opts[key]===undefined){opts[key]=defaults[key]}}if(opts.recurse_count>8){throw new FS.ErrnoError(ERRNO_CODES.ELOOP)}var parts=PATH.normalizeArray(path.split("/").filter((function(p){return!!p})),false);var current=FS.root;var current_path="/";for(var i=0;i40){throw new FS.ErrnoError(ERRNO_CODES.ELOOP)}}}}return{path:current_path,node:current}}),getPath:(function(node){var path;while(true){if(FS.isRoot(node)){var mount=node.mount.mountpoint;if(!path)return mount;return mount[mount.length-1]!=="/"?mount+"/"+path:mount+path}path=path?node.name+"/"+path:node.name;node=node.parent}}),hashName:(function(parentid,name){var hash=0;for(var i=0;i>>0)%FS.nameTable.length}),hashAddNode:(function(node){var hash=FS.hashName(node.parent.id,node.name);node.name_next=FS.nameTable[hash];FS.nameTable[hash]=node}),hashRemoveNode:(function(node){var hash=FS.hashName(node.parent.id,node.name);if(FS.nameTable[hash]===node){FS.nameTable[hash]=node.name_next}else{var current=FS.nameTable[hash];while(current){if(current.name_next===node){current.name_next=node.name_next;break}current=current.name_next}}}),lookupNode:(function(parent,name){var err=FS.mayLookup(parent);if(err){throw new FS.ErrnoError(err,parent)}var hash=FS.hashName(parent.id,name);for(var node=FS.nameTable[hash];node;node=node.name_next){var nodeName=node.name;if(node.parent.id===parent.id&&nodeName===name){return node}}return FS.lookup(parent,name)}),createNode:(function(parent,name,mode,rdev){if(!FS.FSNode){FS.FSNode=(function(parent,name,mode,rdev){if(!parent){parent=this}this.parent=parent;this.mount=parent.mount;this.mounted=null;this.id=FS.nextInode++;this.name=name;this.mode=mode;this.node_ops={};this.stream_ops={};this.rdev=rdev});FS.FSNode.prototype={};var readMode=292|73;var writeMode=146;Object.defineProperties(FS.FSNode.prototype,{read:{get:(function(){return(this.mode&readMode)===readMode}),set:(function(val){val?this.mode|=readMode:this.mode&=~readMode})},write:{get:(function(){return(this.mode&writeMode)===writeMode}),set:(function(val){val?this.mode|=writeMode:this.mode&=~writeMode})},isFolder:{get:(function(){return FS.isDir(this.mode)})},isDevice:{get:(function(){return FS.isChrdev(this.mode)})}})}var node=new FS.FSNode(parent,name,mode,rdev);FS.hashAddNode(node);return node}),destroyNode:(function(node){FS.hashRemoveNode(node)}),isRoot:(function(node){return node===node.parent}),isMountpoint:(function(node){return!!node.mounted}),isFile:(function(mode){return(mode&61440)===32768}),isDir:(function(mode){return(mode&61440)===16384}),isLink:(function(mode){return(mode&61440)===40960}),isChrdev:(function(mode){return(mode&61440)===8192}),isBlkdev:(function(mode){return(mode&61440)===24576}),isFIFO:(function(mode){return(mode&61440)===4096}),isSocket:(function(mode){return(mode&49152)===49152}),flagModes:{"r":0,"rs":1052672,"r+":2,"w":577,"wx":705,"xw":705,"w+":578,"wx+":706,"xw+":706,"a":1089,"ax":1217,"xa":1217,"a+":1090,"ax+":1218,"xa+":1218},modeStringToFlags:(function(str){var flags=FS.flagModes[str];if(typeof flags==="undefined"){throw new Error("Unknown file open mode: "+str)}return flags}),flagsToPermissionString:(function(flag){var perms=["r","w","rw"][flag&3];if(flag&512){perms+="w"}return perms}),nodePermissions:(function(node,perms){if(FS.ignorePermissions){return 0}if(perms.indexOf("r")!==-1&&!(node.mode&292)){return ERRNO_CODES.EACCES}else if(perms.indexOf("w")!==-1&&!(node.mode&146)){return ERRNO_CODES.EACCES}else if(perms.indexOf("x")!==-1&&!(node.mode&73)){return ERRNO_CODES.EACCES}return 0}),mayLookup:(function(dir){var err=FS.nodePermissions(dir,"x");if(err)return err;if(!dir.node_ops.lookup)return ERRNO_CODES.EACCES;return 0}),mayCreate:(function(dir,name){try{var node=FS.lookupNode(dir,name);return ERRNO_CODES.EEXIST}catch(e){}return FS.nodePermissions(dir,"wx")}),mayDelete:(function(dir,name,isdir){var node;try{node=FS.lookupNode(dir,name)}catch(e){return e.errno}var err=FS.nodePermissions(dir,"wx");if(err){return err}if(isdir){if(!FS.isDir(node.mode)){return ERRNO_CODES.ENOTDIR}if(FS.isRoot(node)||FS.getPath(node)===FS.cwd()){return ERRNO_CODES.EBUSY}}else{if(FS.isDir(node.mode)){return ERRNO_CODES.EISDIR}}return 0}),mayOpen:(function(node,flags){if(!node){return ERRNO_CODES.ENOENT}if(FS.isLink(node.mode)){return ERRNO_CODES.ELOOP}else if(FS.isDir(node.mode)){if(FS.flagsToPermissionString(flags)!=="r"||flags&512){return ERRNO_CODES.EISDIR}}return FS.nodePermissions(node,FS.flagsToPermissionString(flags))}),MAX_OPEN_FDS:4096,nextfd:(function(fd_start,fd_end){fd_start=fd_start||0;fd_end=fd_end||FS.MAX_OPEN_FDS;for(var fd=fd_start;fd<=fd_end;fd++){if(!FS.streams[fd]){return fd}}throw new FS.ErrnoError(ERRNO_CODES.EMFILE)}),getStream:(function(fd){return FS.streams[fd]}),createStream:(function(stream,fd_start,fd_end){if(!FS.FSStream){FS.FSStream=(function(){});FS.FSStream.prototype={};Object.defineProperties(FS.FSStream.prototype,{object:{get:(function(){return this.node}),set:(function(val){this.node=val})},isRead:{get:(function(){return(this.flags&2097155)!==1})},isWrite:{get:(function(){return(this.flags&2097155)!==0})},isAppend:{get:(function(){return this.flags&1024})}})}var newStream=new FS.FSStream;for(var p in stream){newStream[p]=stream[p]}stream=newStream;var fd=FS.nextfd(fd_start,fd_end);stream.fd=fd;FS.streams[fd]=stream;return stream}),closeStream:(function(fd){FS.streams[fd]=null}),chrdev_stream_ops:{open:(function(stream){var device=FS.getDevice(stream.node.rdev);stream.stream_ops=device.stream_ops;if(stream.stream_ops.open){stream.stream_ops.open(stream)}}),llseek:(function(){throw new FS.ErrnoError(ERRNO_CODES.ESPIPE)})},major:(function(dev){return dev>>8}),minor:(function(dev){return dev&255}),makedev:(function(ma,mi){return ma<<8|mi}),registerDevice:(function(dev,ops){FS.devices[dev]={stream_ops:ops}}),getDevice:(function(dev){return FS.devices[dev]}),getMounts:(function(mount){var mounts=[];var check=[mount];while(check.length){var m=check.pop();mounts.push(m);check.push.apply(check,m.mounts)}return mounts}),syncfs:(function(populate,callback){if(typeof populate==="function"){callback=populate;populate=false}FS.syncFSRequests++;if(FS.syncFSRequests>1){console.log("warning: "+FS.syncFSRequests+" FS.syncfs operations in flight at once, probably just doing extra work")}var mounts=FS.getMounts(FS.root.mount);var completed=0;function doCallback(err){assert(FS.syncFSRequests>0);FS.syncFSRequests--;return callback(err)}function done(err){if(err){if(!done.errored){done.errored=true;return doCallback(err)}return}if(++completed>=mounts.length){doCallback(null)}}mounts.forEach((function(mount){if(!mount.type.syncfs){return done(null)}mount.type.syncfs(mount,populate,done)}))}),mount:(function(type,opts,mountpoint){var root=mountpoint==="/";var pseudo=!mountpoint;var node;if(root&&FS.root){throw new FS.ErrnoError(ERRNO_CODES.EBUSY)}else if(!root&&!pseudo){var lookup=FS.lookupPath(mountpoint,{follow_mount:false});mountpoint=lookup.path;node=lookup.node;if(FS.isMountpoint(node)){throw new FS.ErrnoError(ERRNO_CODES.EBUSY)}if(!FS.isDir(node.mode)){throw new FS.ErrnoError(ERRNO_CODES.ENOTDIR)}}var mount={type:type,opts:opts,mountpoint:mountpoint,mounts:[]};var mountRoot=type.mount(mount);mountRoot.mount=mount;mount.root=mountRoot;if(root){FS.root=mountRoot}else if(node){node.mounted=mount;if(node.mount){node.mount.mounts.push(mount)}}return mountRoot}),unmount:(function(mountpoint){var lookup=FS.lookupPath(mountpoint,{follow_mount:false});if(!FS.isMountpoint(lookup.node)){throw new FS.ErrnoError(ERRNO_CODES.EINVAL)}var node=lookup.node;var mount=node.mounted;var mounts=FS.getMounts(mount);Object.keys(FS.nameTable).forEach((function(hash){var current=FS.nameTable[hash];while(current){var next=current.name_next;if(mounts.indexOf(current.mount)!==-1){FS.destroyNode(current)}current=next}}));node.mounted=null;var idx=node.mount.mounts.indexOf(mount);assert(idx!==-1);node.mount.mounts.splice(idx,1)}),lookup:(function(parent,name){return parent.node_ops.lookup(parent,name)}),mknod:(function(path,mode,dev){var lookup=FS.lookupPath(path,{parent:true});var parent=lookup.node;var name=PATH.basename(path);if(!name||name==="."||name===".."){throw new FS.ErrnoError(ERRNO_CODES.EINVAL)}var err=FS.mayCreate(parent,name);if(err){throw new FS.ErrnoError(err)}if(!parent.node_ops.mknod){throw new FS.ErrnoError(ERRNO_CODES.EPERM)}return parent.node_ops.mknod(parent,name,mode,dev)}),create:(function(path,mode){mode=mode!==undefined?mode:438;mode&=4095;mode|=32768;return FS.mknod(path,mode,0)}),mkdir:(function(path,mode){mode=mode!==undefined?mode:511;mode&=511|512;mode|=16384;return FS.mknod(path,mode,0)}),mkdirTree:(function(path,mode){var dirs=path.split("/");var d="";for(var i=0;ithis.length-1||idx<0){return undefined}var chunkOffset=idx%this.chunkSize;var chunkNum=idx/this.chunkSize|0;return this.getter(chunkNum)[chunkOffset]};LazyUint8Array.prototype.setDataGetter=function LazyUint8Array_setDataGetter(getter){this.getter=getter};LazyUint8Array.prototype.cacheLength=function LazyUint8Array_cacheLength(){var xhr=new XMLHttpRequest;xhr.open("HEAD",url,false);xhr.send(null);if(!(xhr.status>=200&&xhr.status<300||xhr.status===304))throw new Error("Couldn't load "+url+". Status: "+xhr.status);var datalength=Number(xhr.getResponseHeader("Content-length"));var header;var hasByteServing=(header=xhr.getResponseHeader("Accept-Ranges"))&&header==="bytes";var usesGzip=(header=xhr.getResponseHeader("Content-Encoding"))&&header==="gzip";var chunkSize=1024*1024;if(!hasByteServing)chunkSize=datalength;var doXHR=(function(from,to){if(from>to)throw new Error("invalid range ("+from+", "+to+") or no bytes requested!");if(to>datalength-1)throw new Error("only "+datalength+" bytes available! programmer error!");var xhr=new XMLHttpRequest;xhr.open("GET",url,false);if(datalength!==chunkSize)xhr.setRequestHeader("Range","bytes="+from+"-"+to);if(typeof Uint8Array!="undefined")xhr.responseType="arraybuffer";if(xhr.overrideMimeType){xhr.overrideMimeType("text/plain; charset=x-user-defined")}xhr.send(null);if(!(xhr.status>=200&&xhr.status<300||xhr.status===304))throw new Error("Couldn't load "+url+". Status: "+xhr.status);if(xhr.response!==undefined){return new Uint8Array(xhr.response||[])}else{return intArrayFromString(xhr.responseText||"",true)}});var lazyArray=this;lazyArray.setDataGetter((function(chunkNum){var start=chunkNum*chunkSize;var end=(chunkNum+1)*chunkSize-1;end=Math.min(end,datalength-1);if(typeof lazyArray.chunks[chunkNum]==="undefined"){lazyArray.chunks[chunkNum]=doXHR(start,end)}if(typeof lazyArray.chunks[chunkNum]==="undefined")throw new Error("doXHR failed!");return lazyArray.chunks[chunkNum]}));if(usesGzip||!datalength){chunkSize=datalength=1;datalength=this.getter(0).length;chunkSize=datalength;console.log("LazyFiles on gzip forces download of the whole file when length is accessed")}this._length=datalength;this._chunkSize=chunkSize;this.lengthKnown=true};if(typeof XMLHttpRequest!=="undefined"){if(!ENVIRONMENT_IS_WORKER)throw"Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc";var lazyArray=new LazyUint8Array;Object.defineProperties(lazyArray,{length:{get:(function(){if(!this.lengthKnown){this.cacheLength()}return this._length})},chunkSize:{get:(function(){if(!this.lengthKnown){this.cacheLength()}return this._chunkSize})}});var properties={isDevice:false,contents:lazyArray}}else{var properties={isDevice:false,url:url}}var node=FS.createFile(parent,name,properties,canRead,canWrite);if(properties.contents){node.contents=properties.contents}else if(properties.url){node.contents=null;node.url=properties.url}Object.defineProperties(node,{usedBytes:{get:(function(){return this.contents.length})}});var stream_ops={};var keys=Object.keys(node.stream_ops);keys.forEach((function(key){var fn=node.stream_ops[key];stream_ops[key]=function forceLoadLazyFile(){if(!FS.forceLoadFile(node)){throw new FS.ErrnoError(ERRNO_CODES.EIO)}return fn.apply(null,arguments)}}));stream_ops.read=function stream_ops_read(stream,buffer,offset,length,position){if(!FS.forceLoadFile(node)){throw new FS.ErrnoError(ERRNO_CODES.EIO)}var contents=stream.node.contents;if(position>=contents.length)return 0;var size=Math.min(contents.length-position,length);assert(size>=0);if(contents.slice){for(var i=0;i>2]=stat.dev;HEAP32[buf+4>>2]=0;HEAP32[buf+8>>2]=stat.ino;HEAP32[buf+12>>2]=stat.mode;HEAP32[buf+16>>2]=stat.nlink;HEAP32[buf+20>>2]=stat.uid;HEAP32[buf+24>>2]=stat.gid;HEAP32[buf+28>>2]=stat.rdev;HEAP32[buf+32>>2]=0;HEAP32[buf+36>>2]=stat.size;HEAP32[buf+40>>2]=4096;HEAP32[buf+44>>2]=stat.blocks;HEAP32[buf+48>>2]=stat.atime.getTime()/1e3|0;HEAP32[buf+52>>2]=0;HEAP32[buf+56>>2]=stat.mtime.getTime()/1e3|0;HEAP32[buf+60>>2]=0;HEAP32[buf+64>>2]=stat.ctime.getTime()/1e3|0;HEAP32[buf+68>>2]=0;HEAP32[buf+72>>2]=stat.ino;return 0}),doMsync:(function(addr,stream,len,flags){var buffer=new Uint8Array(HEAPU8.subarray(addr,addr+len));FS.msync(stream,buffer,0,len,flags)}),doMkdir:(function(path,mode){path=PATH.normalize(path);if(path[path.length-1]==="/")path=path.substr(0,path.length-1);FS.mkdir(path,mode,0);return 0}),doMknod:(function(path,mode,dev){switch(mode&61440){case 32768:case 8192:case 24576:case 4096:case 49152:break;default:return-ERRNO_CODES.EINVAL}FS.mknod(path,mode,dev);return 0}),doReadlink:(function(path,buf,bufsize){if(bufsize<=0)return-ERRNO_CODES.EINVAL;var ret=FS.readlink(path);var len=Math.min(bufsize,lengthBytesUTF8(ret));var endChar=HEAP8[buf+len];stringToUTF8(ret,buf,bufsize+1);HEAP8[buf+len]=endChar;return len}),doAccess:(function(path,amode){if(amode&~7){return-ERRNO_CODES.EINVAL}var node;var lookup=FS.lookupPath(path,{follow:true});node=lookup.node;var perms="";if(amode&4)perms+="r";if(amode&2)perms+="w";if(amode&1)perms+="x";if(perms&&FS.nodePermissions(node,perms)){return-ERRNO_CODES.EACCES}return 0}),doDup:(function(path,flags,suggestFD){var suggest=FS.getStream(suggestFD);if(suggest)FS.close(suggest);return FS.open(path,flags,0,suggestFD,suggestFD).fd}),doReadv:(function(stream,iov,iovcnt,offset){var ret=0;for(var i=0;i>2];var len=HEAP32[iov+(i*8+4)>>2];var curr=FS.read(stream,HEAP8,ptr,len,offset);if(curr<0)return-1;ret+=curr;if(curr>2];var len=HEAP32[iov+(i*8+4)>>2];var curr=FS.write(stream,HEAP8,ptr,len,offset);if(curr<0)return-1;ret+=curr}return ret}),varargs:0,get:(function(varargs){SYSCALLS.varargs+=4;var ret=HEAP32[SYSCALLS.varargs-4>>2];return ret}),getStr:(function(){var ret=Pointer_stringify(SYSCALLS.get());return ret}),getStreamFromFD:(function(){var stream=FS.getStream(SYSCALLS.get());if(!stream)throw new FS.ErrnoError(ERRNO_CODES.EBADF);return stream}),getSocketFromFD:(function(){var socket=SOCKFS.getSocket(SYSCALLS.get());if(!socket)throw new FS.ErrnoError(ERRNO_CODES.EBADF);return socket}),getSocketAddress:(function(allowNull){var addrp=SYSCALLS.get(),addrlen=SYSCALLS.get();if(allowNull&&addrp===0)return null;var info=__read_sockaddr(addrp,addrlen);if(info.errno)throw new FS.ErrnoError(info.errno);info.addr=DNS.lookup_addr(info.addr)||info.addr;return info}),get64:(function(){var low=SYSCALLS.get(),high=SYSCALLS.get();if(low>=0)assert(high===0);else assert(high===-1);return low}),getZero:(function(){assert(SYSCALLS.get()===0)})};function ___syscall10(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr();FS.unlink(path);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}var SOCKFS={mount:(function(mount){Module["websocket"]=Module["websocket"]&&"object"===typeof Module["websocket"]?Module["websocket"]:{};Module["websocket"]._callbacks={};Module["websocket"]["on"]=(function(event,callback){if("function"===typeof callback){this._callbacks[event]=callback}return this});Module["websocket"].emit=(function(event,param){if("function"===typeof this._callbacks[event]){this._callbacks[event].call(this,param)}});return FS.createNode(null,"/",16384|511,0)}),createSocket:(function(family,type,protocol){var streaming=type==1;if(protocol){assert(streaming==(protocol==6))}var sock={family:family,type:type,protocol:protocol,server:null,error:null,peers:{},pending:[],recv_queue:[],sock_ops:SOCKFS.websocket_sock_ops};var name=SOCKFS.nextname();var node=FS.createNode(SOCKFS.root,name,49152,0);node.sock=sock;var stream=FS.createStream({path:name,node:node,flags:FS.modeStringToFlags("r+"),seekable:false,stream_ops:SOCKFS.stream_ops});sock.stream=stream;return sock}),getSocket:(function(fd){var stream=FS.getStream(fd);if(!stream||!FS.isSocket(stream.node.mode)){return null}return stream.node.sock}),stream_ops:{poll:(function(stream){var sock=stream.node.sock;return sock.sock_ops.poll(sock)}),ioctl:(function(stream,request,varargs){var sock=stream.node.sock;return sock.sock_ops.ioctl(sock,request,varargs)}),read:(function(stream,buffer,offset,length,position){var sock=stream.node.sock;var msg=sock.sock_ops.recvmsg(sock,length);if(!msg){return 0}buffer.set(msg.buffer,offset);return msg.buffer.length}),write:(function(stream,buffer,offset,length,position){var sock=stream.node.sock;return sock.sock_ops.sendmsg(sock,buffer,offset,length)}),close:(function(stream){var sock=stream.node.sock;sock.sock_ops.close(sock)})},nextname:(function(){if(!SOCKFS.nextname.current){SOCKFS.nextname.current=0}return"socket["+SOCKFS.nextname.current++ +"]"}),websocket_sock_ops:{createPeer:(function(sock,addr,port){var ws;if(typeof addr==="object"){ws=addr;addr=null;port=null}if(ws){if(ws._socket){addr=ws._socket.remoteAddress;port=ws._socket.remotePort}else{var result=/ws[s]?:\/\/([^:]+):(\d+)/.exec(ws.url);if(!result){throw new Error("WebSocket URL must be in the format ws(s)://address:port")}addr=result[1];port=parseInt(result[2],10)}}else{try{var runtimeConfig=Module["websocket"]&&"object"===typeof Module["websocket"];var url="ws:#".replace("#","//");if(runtimeConfig){if("string"===typeof Module["websocket"]["url"]){url=Module["websocket"]["url"]}}if(url==="ws://"||url==="wss://"){var parts=addr.split("/");url=url+parts[0]+":"+port+"/"+parts.slice(1).join("/")}var subProtocols="binary";if(runtimeConfig){if("string"===typeof Module["websocket"]["subprotocol"]){subProtocols=Module["websocket"]["subprotocol"]}}subProtocols=subProtocols.replace(/^ +| +$/g,"").split(/ *, */);var opts=ENVIRONMENT_IS_NODE?{"protocol":subProtocols.toString()}:subProtocols;if(runtimeConfig&&null===Module["websocket"]["subprotocol"]){subProtocols="null";opts=undefined}var WebSocketConstructor;if(ENVIRONMENT_IS_NODE){WebSocketConstructor=require("ws")}else if(ENVIRONMENT_IS_WEB){WebSocketConstructor=window["WebSocket"]}else{WebSocketConstructor=WebSocket}ws=new WebSocketConstructor(url,opts);ws.binaryType="arraybuffer"}catch(e){throw new FS.ErrnoError(ERRNO_CODES.EHOSTUNREACH)}}var peer={addr:addr,port:port,socket:ws,dgram_send_queue:[]};SOCKFS.websocket_sock_ops.addPeer(sock,peer);SOCKFS.websocket_sock_ops.handlePeerEvents(sock,peer);if(sock.type===2&&typeof sock.sport!=="undefined"){peer.dgram_send_queue.push(new Uint8Array([255,255,255,255,"p".charCodeAt(0),"o".charCodeAt(0),"r".charCodeAt(0),"t".charCodeAt(0),(sock.sport&65280)>>8,sock.sport&255]))}return peer}),getPeer:(function(sock,addr,port){return sock.peers[addr+":"+port]}),addPeer:(function(sock,peer){sock.peers[peer.addr+":"+peer.port]=peer}),removePeer:(function(sock,peer){delete sock.peers[peer.addr+":"+peer.port]}),handlePeerEvents:(function(sock,peer){var first=true;var handleOpen=(function(){Module["websocket"].emit("open",sock.stream.fd);try{var queued=peer.dgram_send_queue.shift();while(queued){peer.socket.send(queued);queued=peer.dgram_send_queue.shift()}}catch(e){peer.socket.close()}});function handleMessage(data){assert(typeof data!=="string"&&data.byteLength!==undefined);if(data.byteLength==0){return}data=new Uint8Array(data);var wasfirst=first;first=false;if(wasfirst&&data.length===10&&data[0]===255&&data[1]===255&&data[2]===255&&data[3]===255&&data[4]==="p".charCodeAt(0)&&data[5]==="o".charCodeAt(0)&&data[6]==="r".charCodeAt(0)&&data[7]==="t".charCodeAt(0)){var newport=data[8]<<8|data[9];SOCKFS.websocket_sock_ops.removePeer(sock,peer);peer.port=newport;SOCKFS.websocket_sock_ops.addPeer(sock,peer);return}sock.recv_queue.push({addr:peer.addr,port:peer.port,data:data});Module["websocket"].emit("message",sock.stream.fd)}if(ENVIRONMENT_IS_NODE){peer.socket.on("open",handleOpen);peer.socket.on("message",(function(data,flags){if(!flags.binary){return}handleMessage((new Uint8Array(data)).buffer)}));peer.socket.on("close",(function(){Module["websocket"].emit("close",sock.stream.fd)}));peer.socket.on("error",(function(error){sock.error=ERRNO_CODES.ECONNREFUSED;Module["websocket"].emit("error",[sock.stream.fd,sock.error,"ECONNREFUSED: Connection refused"])}))}else{peer.socket.onopen=handleOpen;peer.socket.onclose=(function(){Module["websocket"].emit("close",sock.stream.fd)});peer.socket.onmessage=function peer_socket_onmessage(event){handleMessage(event.data)};peer.socket.onerror=(function(error){sock.error=ERRNO_CODES.ECONNREFUSED;Module["websocket"].emit("error",[sock.stream.fd,sock.error,"ECONNREFUSED: Connection refused"])})}}),poll:(function(sock){if(sock.type===1&&sock.server){return sock.pending.length?64|1:0}var mask=0;var dest=sock.type===1?SOCKFS.websocket_sock_ops.getPeer(sock,sock.daddr,sock.dport):null;if(sock.recv_queue.length||!dest||dest&&dest.socket.readyState===dest.socket.CLOSING||dest&&dest.socket.readyState===dest.socket.CLOSED){mask|=64|1}if(!dest||dest&&dest.socket.readyState===dest.socket.OPEN){mask|=4}if(dest&&dest.socket.readyState===dest.socket.CLOSING||dest&&dest.socket.readyState===dest.socket.CLOSED){mask|=16}return mask}),ioctl:(function(sock,request,arg){switch(request){case 21531:var bytes=0;if(sock.recv_queue.length){bytes=sock.recv_queue[0].data.length}HEAP32[arg>>2]=bytes;return 0;default:return ERRNO_CODES.EINVAL}}),close:(function(sock){if(sock.server){try{sock.server.close()}catch(e){}sock.server=null}var peers=Object.keys(sock.peers);for(var i=0;i>>0}function __inet_pton6_raw(str){var words;var w,offset,z,i;var valid6regx=/^((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\3)::|:\b|$))|(?!\2\3)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i;var parts=[];if(!valid6regx.test(str)){return null}if(str==="::"){return[0,0,0,0,0,0,0,0]}if(str.indexOf("::")===0){str=str.replace("::","Z:")}else{str=str.replace("::",":Z:")}if(str.indexOf(".")>0){str=str.replace(new RegExp("[.]","g"),":");words=str.split(":");words[words.length-4]=parseInt(words[words.length-4])+parseInt(words[words.length-3])*256;words[words.length-3]=parseInt(words[words.length-2])+parseInt(words[words.length-1])*256;words=words.slice(0,words.length-2)}else{words=str.split(":")}offset=0;z=0;for(w=0;w>8&255)+"."+(addr>>16&255)+"."+(addr>>24&255)}function __inet_ntop6_raw(ints){var str="";var word=0;var longest=0;var lastzero=0;var zstart=0;var len=0;var i=0;var parts=[ints[0]&65535,ints[0]>>16,ints[1]&65535,ints[1]>>16,ints[2]&65535,ints[2]>>16,ints[3]&65535,ints[3]>>16];var hasipv4=true;var v4part="";for(i=0;i<5;i++){if(parts[i]!==0){hasipv4=false;break}}if(hasipv4){v4part=__inet_ntop4_raw(parts[6]|parts[7]<<16);if(parts[5]===-1){str="::ffff:";str+=v4part;return str}if(parts[5]===0){str="::";if(v4part==="0.0.0.0")v4part="";if(v4part==="0.0.0.1")v4part="1";str+=v4part;return str}}for(word=0;word<8;word++){if(parts[word]===0){if(word-lastzero>1){len=0}lastzero=word;len++}if(len>longest){longest=len;zstart=word-longest+1}}for(word=0;word<8;word++){if(longest>1){if(parts[word]===0&&word>=zstart&&word>1];var port=_ntohs(HEAP16[sa+2>>1]);var addr;switch(family){case 2:if(salen!==16){return{errno:ERRNO_CODES.EINVAL}}addr=HEAP32[sa+4>>2];addr=__inet_ntop4_raw(addr);break;case 10:if(salen!==28){return{errno:ERRNO_CODES.EINVAL}}addr=[HEAP32[sa+8>>2],HEAP32[sa+12>>2],HEAP32[sa+16>>2],HEAP32[sa+20>>2]];addr=__inet_ntop6_raw(addr);break;default:return{errno:ERRNO_CODES.EAFNOSUPPORT}}return{family:family,addr:addr,port:port}}function __write_sockaddr(sa,family,addr,port){switch(family){case 2:addr=__inet_pton4_raw(addr);HEAP16[sa>>1]=family;HEAP32[sa+4>>2]=addr;HEAP16[sa+2>>1]=_htons(port);break;case 10:addr=__inet_pton6_raw(addr);HEAP32[sa>>2]=family;HEAP32[sa+8>>2]=addr[0];HEAP32[sa+12>>2]=addr[1];HEAP32[sa+16>>2]=addr[2];HEAP32[sa+20>>2]=addr[3];HEAP16[sa+2>>1]=_htons(port);HEAP32[sa+4>>2]=0;HEAP32[sa+24>>2]=0;break;default:return{errno:ERRNO_CODES.EAFNOSUPPORT}}return{}}function ___syscall102(which,varargs){SYSCALLS.varargs=varargs;try{var call=SYSCALLS.get(),socketvararg=SYSCALLS.get();SYSCALLS.varargs=socketvararg;switch(call){case 1:{var domain=SYSCALLS.get(),type=SYSCALLS.get(),protocol=SYSCALLS.get();var sock=SOCKFS.createSocket(domain,type,protocol);assert(sock.stream.fd<64);return sock.stream.fd};case 2:{var sock=SYSCALLS.getSocketFromFD(),info=SYSCALLS.getSocketAddress();sock.sock_ops.bind(sock,info.addr,info.port);return 0};case 3:{var sock=SYSCALLS.getSocketFromFD(),info=SYSCALLS.getSocketAddress();sock.sock_ops.connect(sock,info.addr,info.port);return 0};case 4:{var sock=SYSCALLS.getSocketFromFD(),backlog=SYSCALLS.get();sock.sock_ops.listen(sock,backlog);return 0};case 5:{var sock=SYSCALLS.getSocketFromFD(),addr=SYSCALLS.get(),addrlen=SYSCALLS.get();var newsock=sock.sock_ops.accept(sock);if(addr){var res=__write_sockaddr(addr,newsock.family,DNS.lookup_name(newsock.daddr),newsock.dport);assert(!res.errno)}return newsock.stream.fd};case 6:{var sock=SYSCALLS.getSocketFromFD(),addr=SYSCALLS.get(),addrlen=SYSCALLS.get();var res=__write_sockaddr(addr,sock.family,DNS.lookup_name(sock.saddr||"0.0.0.0"),sock.sport);assert(!res.errno);return 0};case 7:{var sock=SYSCALLS.getSocketFromFD(),addr=SYSCALLS.get(),addrlen=SYSCALLS.get();if(!sock.daddr){return-ERRNO_CODES.ENOTCONN}var res=__write_sockaddr(addr,sock.family,DNS.lookup_name(sock.daddr),sock.dport);assert(!res.errno);return 0};case 11:{var sock=SYSCALLS.getSocketFromFD(),message=SYSCALLS.get(),length=SYSCALLS.get(),flags=SYSCALLS.get(),dest=SYSCALLS.getSocketAddress(true);if(!dest){return FS.write(sock.stream,HEAP8,message,length)}else{return sock.sock_ops.sendmsg(sock,HEAP8,message,length,dest.addr,dest.port)}};case 12:{var sock=SYSCALLS.getSocketFromFD(),buf=SYSCALLS.get(),len=SYSCALLS.get(),flags=SYSCALLS.get(),addr=SYSCALLS.get(),addrlen=SYSCALLS.get();var msg=sock.sock_ops.recvmsg(sock,len);if(!msg)return 0;if(addr){var res=__write_sockaddr(addr,sock.family,DNS.lookup_name(msg.addr),msg.port);assert(!res.errno)}HEAPU8.set(msg.buffer,buf);return msg.buffer.byteLength};case 14:{return-ERRNO_CODES.ENOPROTOOPT};case 15:{var sock=SYSCALLS.getSocketFromFD(),level=SYSCALLS.get(),optname=SYSCALLS.get(),optval=SYSCALLS.get(),optlen=SYSCALLS.get();if(level===1){if(optname===4){HEAP32[optval>>2]=sock.error;HEAP32[optlen>>2]=4;sock.error=null;return 0}}return-ERRNO_CODES.ENOPROTOOPT};case 16:{var sock=SYSCALLS.getSocketFromFD(),message=SYSCALLS.get(),flags=SYSCALLS.get();var iov=HEAP32[message+8>>2];var num=HEAP32[message+12>>2];var addr,port;var name=HEAP32[message>>2];var namelen=HEAP32[message+4>>2];if(name){var info=__read_sockaddr(name,namelen);if(info.errno)return-info.errno;port=info.port;addr=DNS.lookup_addr(info.addr)||info.addr}var total=0;for(var i=0;i>2]}var view=new Uint8Array(total);var offset=0;for(var i=0;i>2];var iovlen=HEAP32[iov+(8*i+4)>>2];for(var j=0;j>0]}}return sock.sock_ops.sendmsg(sock,view,0,total,addr,port)};case 17:{var sock=SYSCALLS.getSocketFromFD(),message=SYSCALLS.get(),flags=SYSCALLS.get();var iov=HEAP32[message+8>>2];var num=HEAP32[message+12>>2];var total=0;for(var i=0;i>2]}var msg=sock.sock_ops.recvmsg(sock,total);if(!msg)return 0;var name=HEAP32[message>>2];if(name){var res=__write_sockaddr(name,sock.family,DNS.lookup_name(msg.addr),msg.port);assert(!res.errno)}var bytesRead=0;var bytesRemaining=msg.buffer.byteLength;for(var i=0;bytesRemaining>0&&i>2];var iovlen=HEAP32[iov+(8*i+4)>>2];if(!iovlen){continue}var length=Math.min(iovlen,bytesRemaining);var buf=msg.buffer.subarray(bytesRead,bytesRead+length);HEAPU8.set(buf,iovbase+bytesRead);bytesRead+=length;bytesRemaining-=length}return bytesRead};default:abort("unsupported socketcall syscall "+call)}}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall114(which,varargs){SYSCALLS.varargs=varargs;try{abort("cannot wait on child processes")}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall118(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD();return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall121(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.EPERM}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall122(which,varargs){SYSCALLS.varargs=varargs;try{var buf=SYSCALLS.get();if(!buf)return-ERRNO_CODES.EFAULT;var layout={"sysname":0,"nodename":65,"domainname":325,"machine":260,"version":195,"release":130,"__size__":390};function copyString(element,value){var offset=layout[element];writeAsciiToMemory(value,buf+offset)}copyString("sysname","Emscripten");copyString("nodename","emscripten");copyString("release","1.0");copyString("version","#1");copyString("machine","x86-JS");return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall125(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}var PROCINFO={ppid:1,pid:42,sid:42,pgid:42};function ___syscall132(which,varargs){SYSCALLS.varargs=varargs;try{var pid=SYSCALLS.get();if(pid&&pid!==PROCINFO.pid)return-ERRNO_CODES.ESRCH;return PROCINFO.pgid}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall133(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD();FS.chdir(stream.path);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall14(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),mode=SYSCALLS.get(),dev=SYSCALLS.get();return SYSCALLS.doMknod(path,mode,dev)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall140(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),offset_high=SYSCALLS.get(),offset_low=SYSCALLS.get(),result=SYSCALLS.get(),whence=SYSCALLS.get();var offset=offset_low;FS.llseek(stream,offset,whence);HEAP32[result>>2]=stream.position;if(stream.getdents&&offset===0&&whence===0)stream.getdents=null;return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall142(which,varargs){SYSCALLS.varargs=varargs;try{var nfds=SYSCALLS.get(),readfds=SYSCALLS.get(),writefds=SYSCALLS.get(),exceptfds=SYSCALLS.get(),timeout=SYSCALLS.get();assert(nfds<=64,"nfds must be less than or equal to 64");assert(!exceptfds,"exceptfds not supported");var total=0;var srcReadLow=readfds?HEAP32[readfds>>2]:0,srcReadHigh=readfds?HEAP32[readfds+4>>2]:0;var srcWriteLow=writefds?HEAP32[writefds>>2]:0,srcWriteHigh=writefds?HEAP32[writefds+4>>2]:0;var srcExceptLow=exceptfds?HEAP32[exceptfds>>2]:0,srcExceptHigh=exceptfds?HEAP32[exceptfds+4>>2]:0;var dstReadLow=0,dstReadHigh=0;var dstWriteLow=0,dstWriteHigh=0;var dstExceptLow=0,dstExceptHigh=0;var allLow=(readfds?HEAP32[readfds>>2]:0)|(writefds?HEAP32[writefds>>2]:0)|(exceptfds?HEAP32[exceptfds>>2]:0);var allHigh=(readfds?HEAP32[readfds+4>>2]:0)|(writefds?HEAP32[writefds+4>>2]:0)|(exceptfds?HEAP32[exceptfds+4>>2]:0);function check(fd,low,high,val){return fd<32?low&val:high&val}for(var fd=0;fd>2]=dstReadLow;HEAP32[readfds+4>>2]=dstReadHigh}if(writefds){HEAP32[writefds>>2]=dstWriteLow;HEAP32[writefds+4>>2]=dstWriteHigh}if(exceptfds){HEAP32[exceptfds>>2]=dstExceptLow;HEAP32[exceptfds+4>>2]=dstExceptHigh}return total}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall144(which,varargs){SYSCALLS.varargs=varargs;try{var addr=SYSCALLS.get(),len=SYSCALLS.get(),flags=SYSCALLS.get();var info=SYSCALLS.mappings[addr];if(!info)return 0;SYSCALLS.doMsync(addr,FS.getStream(info.fd),len,info.flags);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall145(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),iov=SYSCALLS.get(),iovcnt=SYSCALLS.get();return SYSCALLS.doReadv(stream,iov,iovcnt)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall146(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),iov=SYSCALLS.get(),iovcnt=SYSCALLS.get();return SYSCALLS.doWritev(stream,iov,iovcnt)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall147(which,varargs){SYSCALLS.varargs=varargs;try{var pid=SYSCALLS.get();if(pid&&pid!==PROCINFO.pid)return-ERRNO_CODES.ESRCH;return PROCINFO.sid}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall148(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD();return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall15(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),mode=SYSCALLS.get();FS.chmod(path,mode);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall153(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall150(){return ___syscall153.apply(null,arguments)}function ___syscall151(){return ___syscall153.apply(null,arguments)}function ___syscall152(){return ___syscall153.apply(null,arguments)}function ___syscall163(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.ENOMEM}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall168(which,varargs){SYSCALLS.varargs=varargs;try{var fds=SYSCALLS.get(),nfds=SYSCALLS.get(),timeout=SYSCALLS.get();var nonzero=0;for(var i=0;i>2];var events=HEAP16[pollfd+4>>1];var mask=32;var stream=FS.getStream(fd);if(stream){mask=SYSCALLS.DEFAULT_POLLMASK;if(stream.stream_ops.poll){mask=stream.stream_ops.poll(stream)}}mask&=events|8|16;if(mask)nonzero++;HEAP16[pollfd+6>>1]=mask}return nonzero}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall180(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),buf=SYSCALLS.get(),count=SYSCALLS.get(),zero=SYSCALLS.getZero(),offset=SYSCALLS.get64();return FS.read(stream,HEAP8,buf,count,offset)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall181(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),buf=SYSCALLS.get(),count=SYSCALLS.get(),zero=SYSCALLS.getZero(),offset=SYSCALLS.get64();return FS.write(stream,HEAP8,buf,count,offset)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall183(which,varargs){SYSCALLS.varargs=varargs;try{var buf=SYSCALLS.get(),size=SYSCALLS.get();if(size===0)return-ERRNO_CODES.EINVAL;var cwd=FS.cwd();var cwdLengthInBytes=lengthBytesUTF8(cwd);if(size>2]=-1;HEAP32[rlim+4>>2]=-1;HEAP32[rlim+8>>2]=-1;HEAP32[rlim+12>>2]=-1;return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall192(which,varargs){SYSCALLS.varargs=varargs;try{var addr=SYSCALLS.get(),len=SYSCALLS.get(),prot=SYSCALLS.get(),flags=SYSCALLS.get(),fd=SYSCALLS.get(),off=SYSCALLS.get();off<<=12;var ptr;var allocated=false;if(fd===-1){ptr=_memalign(PAGE_SIZE,len);if(!ptr)return-ERRNO_CODES.ENOMEM;_memset(ptr,0,len);allocated=true}else{var info=FS.getStream(fd);if(!info)return-ERRNO_CODES.EBADF;var res=FS.mmap(info,HEAPU8,addr,len,off,prot,flags);ptr=res.ptr;allocated=res.allocated}SYSCALLS.mappings[ptr]={malloc:ptr,len:len,allocated:allocated,fd:fd,flags:flags};return ptr}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall193(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),zero=SYSCALLS.getZero(),length=SYSCALLS.get64();FS.truncate(path,length);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall194(which,varargs){SYSCALLS.varargs=varargs;try{var fd=SYSCALLS.get(),zero=SYSCALLS.getZero(),length=SYSCALLS.get64();FS.ftruncate(fd,length);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall195(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),buf=SYSCALLS.get();return SYSCALLS.doStat(FS.stat,path,buf)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall196(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),buf=SYSCALLS.get();return SYSCALLS.doStat(FS.lstat,path,buf)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall197(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),buf=SYSCALLS.get();return SYSCALLS.doStat(FS.stat,stream.path,buf)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall198(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),owner=SYSCALLS.get(),group=SYSCALLS.get();FS.chown(path,owner,group);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall202(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall199(){return ___syscall202.apply(null,arguments)}function ___syscall20(which,varargs){SYSCALLS.varargs=varargs;try{return PROCINFO.pid}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall200(){return ___syscall202.apply(null,arguments)}function ___syscall201(){return ___syscall202.apply(null,arguments)}function ___syscall205(which,varargs){SYSCALLS.varargs=varargs;try{var size=SYSCALLS.get(),list=SYSCALLS.get();if(size<1)return-ERRNO_CODES.EINVAL;HEAP32[list>>2]=0;return 1}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall207(which,varargs){SYSCALLS.varargs=varargs;try{var fd=SYSCALLS.get(),owner=SYSCALLS.get(),group=SYSCALLS.get();FS.fchown(fd,owner,group);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall211(which,varargs){SYSCALLS.varargs=varargs;try{var ruid=SYSCALLS.get(),euid=SYSCALLS.get(),suid=SYSCALLS.get();HEAP32[ruid>>2]=0;HEAP32[euid>>2]=0;HEAP32[suid>>2]=0;return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall209(){return ___syscall211.apply(null,arguments)}function ___syscall212(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),owner=SYSCALLS.get(),group=SYSCALLS.get();FS.chown(path,owner,group);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall218(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.ENOSYS}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall219(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall220(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),dirp=SYSCALLS.get(),count=SYSCALLS.get();if(!stream.getdents){stream.getdents=FS.readdir(stream.path)}var pos=0;while(stream.getdents.length>0&&pos+268<=count){var id;var type;var name=stream.getdents.pop();if(name[0]==="."){id=1;type=4}else{var child=FS.lookupNode(stream.node,name);id=child.id;type=FS.isChrdev(child.mode)?2:FS.isDir(child.mode)?4:FS.isLink(child.mode)?10:8}HEAP32[dirp+pos>>2]=id;HEAP32[dirp+pos+4>>2]=stream.position;HEAP16[dirp+pos+8>>1]=268;HEAP8[dirp+pos+10>>0]=type;stringToUTF8(name,dirp+pos+11,256);pos+=268}return pos}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall221(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),cmd=SYSCALLS.get();switch(cmd){case 0:{var arg=SYSCALLS.get();if(arg<0){return-ERRNO_CODES.EINVAL}var newStream;newStream=FS.open(stream.path,stream.flags,0,arg);return newStream.fd};case 1:case 2:return 0;case 3:return stream.flags;case 4:{var arg=SYSCALLS.get();stream.flags|=arg;return 0};case 12:case 12:{var arg=SYSCALLS.get();var offset=0;HEAP16[arg+offset>>1]=2;return 0};case 13:case 14:case 13:case 14:return 0;case 16:case 8:return-ERRNO_CODES.EINVAL;case 9:___setErrNo(ERRNO_CODES.EINVAL);return-1;default:{return-ERRNO_CODES.EINVAL}}}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall268(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),size=SYSCALLS.get(),buf=SYSCALLS.get();assert(size===64);HEAP32[buf+4>>2]=4096;HEAP32[buf+40>>2]=4096;HEAP32[buf+8>>2]=1e6;HEAP32[buf+12>>2]=5e5;HEAP32[buf+16>>2]=5e5;HEAP32[buf+20>>2]=FS.nextInode;HEAP32[buf+24>>2]=1e6;HEAP32[buf+28>>2]=42;HEAP32[buf+44>>2]=2;HEAP32[buf+36>>2]=255;return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall269(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),size=SYSCALLS.get(),buf=SYSCALLS.get();return ___syscall([268,0,size,buf],0)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall272(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall29(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.EINTR}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall295(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),flags=SYSCALLS.get(),mode=SYSCALLS.get();path=SYSCALLS.calculateAt(dirfd,path);return FS.open(path,flags,mode).fd}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall296(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),mode=SYSCALLS.get();path=SYSCALLS.calculateAt(dirfd,path);return SYSCALLS.doMkdir(path,mode)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall297(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),mode=SYSCALLS.get(),dev=SYSCALLS.get();path=SYSCALLS.calculateAt(dirfd,path);return SYSCALLS.doMknod(path,mode,dev)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall298(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),owner=SYSCALLS.get(),group=SYSCALLS.get(),flags=SYSCALLS.get();assert(flags===0);path=SYSCALLS.calculateAt(dirfd,path);FS.chown(path,owner,group);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall3(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),buf=SYSCALLS.get(),count=SYSCALLS.get();return FS.read(stream,HEAP8,buf,count)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall300(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),buf=SYSCALLS.get(),flags=SYSCALLS.get();var nofollow=flags&256;flags=flags&~256;assert(!flags,flags);path=SYSCALLS.calculateAt(dirfd,path);return SYSCALLS.doStat(nofollow?FS.lstat:FS.stat,path,buf)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall301(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),flags=SYSCALLS.get();path=SYSCALLS.calculateAt(dirfd,path);if(flags===0){FS.unlink(path)}else if(flags===512){FS.rmdir(path)}else{abort("Invalid flags passed to unlinkat")}return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall302(which,varargs){SYSCALLS.varargs=varargs;try{var olddirfd=SYSCALLS.get(),oldpath=SYSCALLS.getStr(),newdirfd=SYSCALLS.get(),newpath=SYSCALLS.getStr();oldpath=SYSCALLS.calculateAt(olddirfd,oldpath);newpath=SYSCALLS.calculateAt(newdirfd,newpath);FS.rename(oldpath,newpath);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall303(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.EMLINK}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall304(which,varargs){SYSCALLS.varargs=varargs;try{var target=SYSCALLS.get(),newdirfd=SYSCALLS.get(),linkpath=SYSCALLS.get();linkpath=SYSCALLS.calculateAt(newdirfd,linkpath);FS.symlink(target,linkpath);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall305(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),buf=SYSCALLS.get(),bufsize=SYSCALLS.get();path=SYSCALLS.calculateAt(dirfd,path);return SYSCALLS.doReadlink(path,buf,bufsize)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall306(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),mode=SYSCALLS.get(),flags=SYSCALLS.get();assert(flags===0);path=SYSCALLS.calculateAt(dirfd,path);FS.chmod(path,mode);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall308(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.ENOSYS}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall320(which,varargs){SYSCALLS.varargs=varargs;try{var dirfd=SYSCALLS.get(),path=SYSCALLS.getStr(),times=SYSCALLS.get(),flags=SYSCALLS.get();assert(flags===0);path=SYSCALLS.calculateAt(dirfd,path);var seconds=HEAP32[times>>2];var nanoseconds=HEAP32[times+4>>2];var atime=seconds*1e3+nanoseconds/(1e3*1e3);times+=8;seconds=HEAP32[times>>2];nanoseconds=HEAP32[times+4>>2];var mtime=seconds*1e3+nanoseconds/(1e3*1e3);FS.utime(path,atime,mtime);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall324(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),mode=SYSCALLS.get(),offset=SYSCALLS.get64(),len=SYSCALLS.get64();assert(mode===0);FS.allocate(stream,offset,len);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall33(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),amode=SYSCALLS.get();return SYSCALLS.doAccess(path,amode)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall330(which,varargs){SYSCALLS.varargs=varargs;try{var old=SYSCALLS.getStreamFromFD(),suggestFD=SYSCALLS.get(),flags=SYSCALLS.get();assert(!flags);if(old.fd===suggestFD)return-ERRNO_CODES.EINVAL;return SYSCALLS.doDup(old.path,old.flags,suggestFD)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall331(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.ENOSYS}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall333(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),iov=SYSCALLS.get(),iovcnt=SYSCALLS.get(),offset=SYSCALLS.get();return SYSCALLS.doReadv(stream,iov,iovcnt,offset)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall334(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),iov=SYSCALLS.get(),iovcnt=SYSCALLS.get(),offset=SYSCALLS.get();return SYSCALLS.doWritev(stream,iov,iovcnt,offset)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall337(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall34(which,varargs){SYSCALLS.varargs=varargs;try{var inc=SYSCALLS.get();return-ERRNO_CODES.EPERM}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall340(which,varargs){SYSCALLS.varargs=varargs;try{var pid=SYSCALLS.get(),resource=SYSCALLS.get(),new_limit=SYSCALLS.get(),old_limit=SYSCALLS.get();if(old_limit){HEAP32[old_limit>>2]=-1;HEAP32[old_limit+4>>2]=-1;HEAP32[old_limit+8>>2]=-1;HEAP32[old_limit+12>>2]=-1}return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall345(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall36(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall38(which,varargs){SYSCALLS.varargs=varargs;try{var old_path=SYSCALLS.getStr(),new_path=SYSCALLS.getStr();FS.rename(old_path,new_path);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall39(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),mode=SYSCALLS.get();return SYSCALLS.doMkdir(path,mode)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall4(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),buf=SYSCALLS.get(),count=SYSCALLS.get();return FS.write(stream,HEAP8,buf,count)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall40(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr();FS.rmdir(path);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall41(which,varargs){SYSCALLS.varargs=varargs;try{var old=SYSCALLS.getStreamFromFD();return FS.open(old.path,old.flags,0).fd}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall5(which,varargs){SYSCALLS.varargs=varargs;try{var pathname=SYSCALLS.getStr(),flags=SYSCALLS.get(),mode=SYSCALLS.get();var stream=FS.open(pathname,flags,mode);return stream.fd}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall51(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.ENOSYS}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall54(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD(),op=SYSCALLS.get();switch(op){case 21509:case 21505:{if(!stream.tty)return-ERRNO_CODES.ENOTTY;return 0};case 21510:case 21511:case 21512:case 21506:case 21507:case 21508:{if(!stream.tty)return-ERRNO_CODES.ENOTTY;return 0};case 21519:{if(!stream.tty)return-ERRNO_CODES.ENOTTY;var argp=SYSCALLS.get();HEAP32[argp>>2]=0;return 0};case 21520:{if(!stream.tty)return-ERRNO_CODES.ENOTTY;return-ERRNO_CODES.EINVAL};case 21531:{var argp=SYSCALLS.get();return FS.ioctl(stream,op,argp)};case 21523:{if(!stream.tty)return-ERRNO_CODES.ENOTTY;return 0};case 21524:{if(!stream.tty)return-ERRNO_CODES.ENOTTY;return 0};default:abort("bad ioctl syscall "+op)}}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall57(which,varargs){SYSCALLS.varargs=varargs;try{var pid=SYSCALLS.get(),pgid=SYSCALLS.get();if(pid&&pid!==PROCINFO.pid)return-ERRNO_CODES.ESRCH;if(pgid&&pgid!==PROCINFO.pgid)return-ERRNO_CODES.EPERM;return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall6(which,varargs){SYSCALLS.varargs=varargs;try{var stream=SYSCALLS.getStreamFromFD();FS.close(stream);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall60(which,varargs){SYSCALLS.varargs=varargs;try{var mask=SYSCALLS.get();var old=SYSCALLS.umask;SYSCALLS.umask=mask;return old}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall63(which,varargs){SYSCALLS.varargs=varargs;try{var old=SYSCALLS.getStreamFromFD(),suggestFD=SYSCALLS.get();if(old.fd===suggestFD)return suggestFD;return SYSCALLS.doDup(old.path,old.flags,suggestFD)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall64(which,varargs){SYSCALLS.varargs=varargs;try{return PROCINFO.ppid}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall66(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall75(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall77(which,varargs){SYSCALLS.varargs=varargs;try{var who=SYSCALLS.get(),usage=SYSCALLS.get();_memset(usage,0,136);HEAP32[usage>>2]=1;HEAP32[usage+4>>2]=2;HEAP32[usage+8>>2]=3;HEAP32[usage+12>>2]=4;return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall83(which,varargs){SYSCALLS.varargs=varargs;try{var target=SYSCALLS.getStr(),linkpath=SYSCALLS.getStr();FS.symlink(target,linkpath);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall85(which,varargs){SYSCALLS.varargs=varargs;try{var path=SYSCALLS.getStr(),buf=SYSCALLS.get(),bufsize=SYSCALLS.get();return SYSCALLS.doReadlink(path,buf,bufsize)}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall9(which,varargs){SYSCALLS.varargs=varargs;try{var oldpath=SYSCALLS.get(),newpath=SYSCALLS.get();return-ERRNO_CODES.EMLINK}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall91(which,varargs){SYSCALLS.varargs=varargs;try{var addr=SYSCALLS.get(),len=SYSCALLS.get();var info=SYSCALLS.mappings[addr];if(!info)return 0;if(len===info.len){var stream=FS.getStream(info.fd);SYSCALLS.doMsync(addr,stream,len,info.flags);FS.munmap(stream);SYSCALLS.mappings[addr]=null;if(info.allocated){_free(info.malloc)}}return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall94(which,varargs){SYSCALLS.varargs=varargs;try{var fd=SYSCALLS.get(),mode=SYSCALLS.get();FS.fchmod(fd,mode);return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall96(which,varargs){SYSCALLS.varargs=varargs;try{return 0}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___syscall97(which,varargs){SYSCALLS.varargs=varargs;try{return-ERRNO_CODES.EPERM}catch(e){if(typeof FS==="undefined"||!(e instanceof FS.ErrnoError))abort(e);return-e.errno}}function ___unlock(){}function ___wait(){}function __exit(status){exit(status)}var _emscripten_asm_const_int=true;function _emscripten_run_script(ptr){eval(Pointer_stringify(ptr))}function _fork(){___setErrNo(ERRNO_CODES.EAGAIN);return-1}var ENV={};function _getenv(name){if(name===0)return 0;name=Pointer_stringify(name);if(!ENV.hasOwnProperty(name))return 0;if(_getenv.ret)_free(_getenv.ret);_getenv.ret=allocateUTF8(ENV[name]);return _getenv.ret}function _getnameinfo(sa,salen,node,nodelen,serv,servlen,flags){var info=__read_sockaddr(sa,salen);if(info.errno){return-6}var port=info.port;var addr=info.addr;var overflowed=false;if(node&&nodelen){var lookup;if(flags&1||!(lookup=DNS.lookup_addr(addr))){if(flags&8){return-2}}else{addr=lookup}var numBytesWrittenExclNull=stringToUTF8(addr,node,nodelen);if(numBytesWrittenExclNull+1>=nodelen){overflowed=true}}if(serv&&servlen){port=""+port;var numBytesWrittenExclNull=stringToUTF8(port,serv,servlen);if(numBytesWrittenExclNull+1>=servlen){overflowed=true}}if(overflowed){return-12}return 0}var ___tm_timezone=allocate(intArrayFromString("GMT"),"i8",ALLOC_STATIC);function _gmtime_r(time,tmPtr){var date=new Date(HEAP32[time>>2]*1e3);HEAP32[tmPtr>>2]=date.getUTCSeconds();HEAP32[tmPtr+4>>2]=date.getUTCMinutes();HEAP32[tmPtr+8>>2]=date.getUTCHours();HEAP32[tmPtr+12>>2]=date.getUTCDate();HEAP32[tmPtr+16>>2]=date.getUTCMonth();HEAP32[tmPtr+20>>2]=date.getUTCFullYear()-1900;HEAP32[tmPtr+24>>2]=date.getUTCDay();HEAP32[tmPtr+36>>2]=0;HEAP32[tmPtr+32>>2]=0;var start=Date.UTC(date.getUTCFullYear(),0,1,0,0,0,0);var yday=(date.getTime()-start)/(1e3*60*60*24)|0;HEAP32[tmPtr+28>>2]=yday;HEAP32[tmPtr+40>>2]=___tm_timezone;return tmPtr}function _inet_addr(ptr){var addr=__inet_pton4_raw(Pointer_stringify(ptr));if(addr===null){return-1}return addr}function _llvm_stackrestore(p){var self=_llvm_stacksave;var ret=self.LLVM_SAVEDSTACKS[p];self.LLVM_SAVEDSTACKS.splice(p,1);stackRestore(ret)}function _llvm_stacksave(){var self=_llvm_stacksave;if(!self.LLVM_SAVEDSTACKS){self.LLVM_SAVEDSTACKS=[]}self.LLVM_SAVEDSTACKS.push(stackSave());return self.LLVM_SAVEDSTACKS.length-1}function _emscripten_memcpy_big(dest,src,num){HEAPU8.set(HEAPU8.subarray(src,src+num),dest);return dest}function _usleep(useconds){var msec=useconds/1e3;if((ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER)&&self["performance"]&&self["performance"]["now"]){var start=self["performance"]["now"]();while(self["performance"]["now"]()-start>2];var nanoseconds=HEAP32[rqtp+4>>2];if(rmtp!==0){HEAP32[rmtp>>2]=0;HEAP32[rmtp+4>>2]=0}return _usleep(seconds*1e6+nanoseconds/1e3)}function _pthread_cleanup_pop(){assert(_pthread_cleanup_push.level==__ATEXIT__.length,"cannot pop if something else added meanwhile!");__ATEXIT__.pop();_pthread_cleanup_push.level=__ATEXIT__.length}function _pthread_cleanup_push(routine,arg){__ATEXIT__.push((function(){Module["dynCall_vi"](routine,arg)}));_pthread_cleanup_push.level=__ATEXIT__.length}function _pthread_setcancelstate(){return 0}function _pthread_sigmask(){return 0}function _setitimer(){throw"setitimer() is not implemented yet"}function _sigfillset(set){HEAP32[set>>2]=-1>>>0;return 0}function __isLeapYear(year){return year%4===0&&(year%100!==0||year%400===0)}function __arraySum(array,index){var sum=0;for(var i=0;i<=index;sum+=array[i++]);return sum}var __MONTH_DAYS_LEAP=[31,29,31,30,31,30,31,31,30,31,30,31];var __MONTH_DAYS_REGULAR=[31,28,31,30,31,30,31,31,30,31,30,31];function __addDays(date,days){var newDate=new Date(date.getTime());while(days>0){var leap=__isLeapYear(newDate.getFullYear());var currentMonth=newDate.getMonth();var daysInCurrentMonth=(leap?__MONTH_DAYS_LEAP:__MONTH_DAYS_REGULAR)[currentMonth];if(days>daysInCurrentMonth-newDate.getDate()){days-=daysInCurrentMonth-newDate.getDate()+1;newDate.setDate(1);if(currentMonth<11){newDate.setMonth(currentMonth+1)}else{newDate.setMonth(0);newDate.setFullYear(newDate.getFullYear()+1)}}else{newDate.setDate(newDate.getDate()+days);return newDate}}return newDate}function _strftime(s,maxsize,format,tm){var tm_zone=HEAP32[tm+40>>2];var date={tm_sec:HEAP32[tm>>2],tm_min:HEAP32[tm+4>>2],tm_hour:HEAP32[tm+8>>2],tm_mday:HEAP32[tm+12>>2],tm_mon:HEAP32[tm+16>>2],tm_year:HEAP32[tm+20>>2],tm_wday:HEAP32[tm+24>>2],tm_yday:HEAP32[tm+28>>2],tm_isdst:HEAP32[tm+32>>2],tm_gmtoff:HEAP32[tm+36>>2],tm_zone:tm_zone?Pointer_stringify(tm_zone):""};var pattern=Pointer_stringify(format);var EXPANSION_RULES_1={"%c":"%a %b %d %H:%M:%S %Y","%D":"%m/%d/%y","%F":"%Y-%m-%d","%h":"%b","%r":"%I:%M:%S %p","%R":"%H:%M","%T":"%H:%M:%S","%x":"%m/%d/%y","%X":"%H:%M:%S"};for(var rule in EXPANSION_RULES_1){pattern=pattern.replace(new RegExp(rule,"g"),EXPANSION_RULES_1[rule])}var WEEKDAYS=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];var MONTHS=["January","February","March","April","May","June","July","August","September","October","November","December"];function leadingSomething(value,digits,character){var str=typeof value==="number"?value.toString():value||"";while(str.length0?1:0}var compare;if((compare=sgn(date1.getFullYear()-date2.getFullYear()))===0){if((compare=sgn(date1.getMonth()-date2.getMonth()))===0){compare=sgn(date1.getDate()-date2.getDate())}}return compare}function getFirstWeekStartDate(janFourth){switch(janFourth.getDay()){case 0:return new Date(janFourth.getFullYear()-1,11,29);case 1:return janFourth;case 2:return new Date(janFourth.getFullYear(),0,3);case 3:return new Date(janFourth.getFullYear(),0,2);case 4:return new Date(janFourth.getFullYear(),0,1);case 5:return new Date(janFourth.getFullYear()-1,11,31);case 6:return new Date(janFourth.getFullYear()-1,11,30)}}function getWeekBasedYear(date){var thisDate=__addDays(new Date(date.tm_year+1900,0,1),date.tm_yday);var janFourthThisYear=new Date(thisDate.getFullYear(),0,4);var janFourthNextYear=new Date(thisDate.getFullYear()+1,0,4);var firstWeekStartThisYear=getFirstWeekStartDate(janFourthThisYear);var firstWeekStartNextYear=getFirstWeekStartDate(janFourthNextYear);if(compareByDay(firstWeekStartThisYear,thisDate)<=0){if(compareByDay(firstWeekStartNextYear,thisDate)<=0){return thisDate.getFullYear()+1}else{return thisDate.getFullYear()}}else{return thisDate.getFullYear()-1}}var EXPANSION_RULES_2={"%a":(function(date){return WEEKDAYS[date.tm_wday].substring(0,3)}),"%A":(function(date){return WEEKDAYS[date.tm_wday]}),"%b":(function(date){return MONTHS[date.tm_mon].substring(0,3)}),"%B":(function(date){return MONTHS[date.tm_mon]}),"%C":(function(date){var year=date.tm_year+1900;return leadingNulls(year/100|0,2)}),"%d":(function(date){return leadingNulls(date.tm_mday,2)}),"%e":(function(date){return leadingSomething(date.tm_mday,2," ")}),"%g":(function(date){return getWeekBasedYear(date).toString().substring(2)}),"%G":(function(date){return getWeekBasedYear(date)}),"%H":(function(date){return leadingNulls(date.tm_hour,2)}),"%I":(function(date){var twelveHour=date.tm_hour;if(twelveHour==0)twelveHour=12;else if(twelveHour>12)twelveHour-=12;return leadingNulls(twelveHour,2)}),"%j":(function(date){return leadingNulls(date.tm_mday+__arraySum(__isLeapYear(date.tm_year+1900)?__MONTH_DAYS_LEAP:__MONTH_DAYS_REGULAR,date.tm_mon-1),3)}),"%m":(function(date){return leadingNulls(date.tm_mon+1,2)}),"%M":(function(date){return leadingNulls(date.tm_min,2)}),"%n":(function(){return"\n"}),"%p":(function(date){if(date.tm_hour>=0&&date.tm_hour<12){return"AM"}else{return"PM"}}),"%S":(function(date){return leadingNulls(date.tm_sec,2)}),"%t":(function(){return"\t"}),"%u":(function(date){var day=new Date(date.tm_year+1900,date.tm_mon+1,date.tm_mday,0,0,0,0);return day.getDay()||7}),"%U":(function(date){var janFirst=new Date(date.tm_year+1900,0,1);var firstSunday=janFirst.getDay()===0?janFirst:__addDays(janFirst,7-janFirst.getDay());var endDate=new Date(date.tm_year+1900,date.tm_mon,date.tm_mday);if(compareByDay(firstSunday,endDate)<0){var februaryFirstUntilEndMonth=__arraySum(__isLeapYear(endDate.getFullYear())?__MONTH_DAYS_LEAP:__MONTH_DAYS_REGULAR,endDate.getMonth()-1)-31;var firstSundayUntilEndJanuary=31-firstSunday.getDate();var days=firstSundayUntilEndJanuary+februaryFirstUntilEndMonth+endDate.getDate();return leadingNulls(Math.ceil(days/7),2)}return compareByDay(firstSunday,janFirst)===0?"01":"00"}),"%V":(function(date){var janFourthThisYear=new Date(date.tm_year+1900,0,4);var janFourthNextYear=new Date(date.tm_year+1901,0,4);var firstWeekStartThisYear=getFirstWeekStartDate(janFourthThisYear);var firstWeekStartNextYear=getFirstWeekStartDate(janFourthNextYear);var endDate=__addDays(new Date(date.tm_year+1900,0,1),date.tm_yday);if(compareByDay(endDate,firstWeekStartThisYear)<0){return"53"}if(compareByDay(firstWeekStartNextYear,endDate)<=0){return"01"}var daysDifference;if(firstWeekStartThisYear.getFullYear()=0;off=Math.abs(off)/60;off=off/60*100+off%60;return(ahead?"+":"-")+String("0000"+off).slice(-4)}),"%Z":(function(date){return date.tm_zone}),"%%":(function(){return"%"})};for(var rule in EXPANSION_RULES_2){if(pattern.indexOf(rule)>=0){pattern=pattern.replace(new RegExp(rule,"g"),EXPANSION_RULES_2[rule](date))}}var bytes=intArrayFromString(pattern,false);if(bytes.length>maxsize){return 0}writeArrayToMemory(bytes,s);return bytes.length-1}function _time(ptr){var ret=Date.now()/1e3|0;if(ptr){HEAP32[ptr>>2]=ret}return ret}function _wait(stat_loc){___setErrNo(ERRNO_CODES.ECHILD);return-1}function _waitpid(){return _wait.apply(null,arguments)}if(ENVIRONMENT_IS_NODE){_emscripten_get_now=function _emscripten_get_now_actual(){var t=process["hrtime"]();return t[0]*1e3+t[1]/1e6}}else if(typeof dateNow!=="undefined"){_emscripten_get_now=dateNow}else if(typeof self==="object"&&self["performance"]&&typeof self["performance"]["now"]==="function"){_emscripten_get_now=(function(){return self["performance"]["now"]()})}else if(typeof performance==="object"&&typeof performance["now"]==="function"){_emscripten_get_now=(function(){return performance["now"]()})}else{_emscripten_get_now=Date.now}FS.staticInit();__ATINIT__.unshift((function(){if(!Module["noFSInit"]&&!FS.init.initialized)FS.init()}));__ATMAIN__.push((function(){FS.ignorePermissions=false}));__ATEXIT__.push((function(){FS.quit()}));__ATINIT__.unshift((function(){TTY.init()}));__ATEXIT__.push((function(){TTY.shutdown()}));if(ENVIRONMENT_IS_NODE){var fs=require("fs");var NODEJS_PATH=require("path");NODEFS.staticInit()}__ATINIT__.push((function(){SOCKFS.root=FS.mount(SOCKFS,{},null)}));DYNAMICTOP_PTR=staticAlloc(4);STACK_BASE=STACKTOP=alignMemory(STATICTOP);STACK_MAX=STACK_BASE+TOTAL_STACK;DYNAMIC_BASE=alignMemory(STACK_MAX);HEAP32[DYNAMICTOP_PTR>>2]=DYNAMIC_BASE;staticSealed=true;var ASSERTIONS=false;function intArrayFromString(stringy,dontAddNull,length){var len=length>0?length:lengthBytesUTF8(stringy)+1;var u8array=new Array(len);var numBytesWritten=stringToUTF8Array(stringy,u8array,0,u8array.length);if(dontAddNull)u8array.length=numBytesWritten;return u8array}function intArrayToString(array){var ret=[];for(var i=0;i255){if(ASSERTIONS){assert(false,"Character code "+chr+" ("+String.fromCharCode(chr)+") at offset "+i+" not in 0x00-0xFF.")}chr&=255}ret.push(String.fromCharCode(chr))}return ret.join("")}Module["wasmTableSize"]=65;Module["wasmMaxTableSize"]=65;function invoke_ii(index,a1){var sp=stackSave();try{return Module["dynCall_ii"](index,a1)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}function invoke_iii(index,a1,a2){var sp=stackSave();try{return Module["dynCall_iii"](index,a1,a2)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}function invoke_iiii(index,a1,a2,a3){var sp=stackSave();try{return Module["dynCall_iiii"](index,a1,a2,a3)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}function invoke_iiiii(index,a1,a2,a3,a4){var sp=stackSave();try{return Module["dynCall_iiiii"](index,a1,a2,a3,a4)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}function invoke_iiiiii(index,a1,a2,a3,a4,a5){var sp=stackSave();try{return Module["dynCall_iiiiii"](index,a1,a2,a3,a4,a5)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}function invoke_v(index){var sp=stackSave();try{Module["dynCall_v"](index)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}function invoke_vi(index,a1){var sp=stackSave();try{Module["dynCall_vi"](index,a1)}catch(e){stackRestore(sp);if(typeof e!=="number"&&e!=="longjmp")throw e;Module["setThrew"](1,0)}}Module.asmGlobalArg={};Module.asmLibraryArg={"abort":abort,"assert":assert,"enlargeMemory":enlargeMemory,"getTotalMemory":getTotalMemory,"setTempRet0":setTempRet0,"getTempRet0":getTempRet0,"abortOnCannotGrowMemory":abortOnCannotGrowMemory,"invoke_ii":invoke_ii,"invoke_iii":invoke_iii,"invoke_iiii":invoke_iiii,"invoke_iiiii":invoke_iiiii,"invoke_iiiiii":invoke_iiiiii,"invoke_v":invoke_v,"invoke_vi":invoke_vi,"___clock_gettime":___clock_gettime,"___lock":___lock,"___map_file":___map_file,"___setErrNo":___setErrNo,"___syscall10":___syscall10,"___syscall102":___syscall102,"___syscall114":___syscall114,"___syscall118":___syscall118,"___syscall121":___syscall121,"___syscall122":___syscall122,"___syscall125":___syscall125,"___syscall132":___syscall132,"___syscall133":___syscall133,"___syscall14":___syscall14,"___syscall140":___syscall140,"___syscall142":___syscall142,"___syscall144":___syscall144,"___syscall145":___syscall145,"___syscall146":___syscall146,"___syscall147":___syscall147,"___syscall148":___syscall148,"___syscall15":___syscall15,"___syscall150":___syscall150,"___syscall151":___syscall151,"___syscall152":___syscall152,"___syscall153":___syscall153,"___syscall163":___syscall163,"___syscall168":___syscall168,"___syscall180":___syscall180,"___syscall181":___syscall181,"___syscall183":___syscall183,"___syscall191":___syscall191,"___syscall192":___syscall192,"___syscall193":___syscall193,"___syscall194":___syscall194,"___syscall195":___syscall195,"___syscall196":___syscall196,"___syscall197":___syscall197,"___syscall198":___syscall198,"___syscall199":___syscall199,"___syscall20":___syscall20,"___syscall200":___syscall200,"___syscall201":___syscall201,"___syscall202":___syscall202,"___syscall205":___syscall205,"___syscall207":___syscall207,"___syscall209":___syscall209,"___syscall211":___syscall211,"___syscall212":___syscall212,"___syscall218":___syscall218,"___syscall219":___syscall219,"___syscall220":___syscall220,"___syscall221":___syscall221,"___syscall268":___syscall268,"___syscall269":___syscall269,"___syscall272":___syscall272,"___syscall29":___syscall29,"___syscall295":___syscall295,"___syscall296":___syscall296,"___syscall297":___syscall297,"___syscall298":___syscall298,"___syscall3":___syscall3,"___syscall300":___syscall300,"___syscall301":___syscall301,"___syscall302":___syscall302,"___syscall303":___syscall303,"___syscall304":___syscall304,"___syscall305":___syscall305,"___syscall306":___syscall306,"___syscall308":___syscall308,"___syscall320":___syscall320,"___syscall324":___syscall324,"___syscall33":___syscall33,"___syscall330":___syscall330,"___syscall331":___syscall331,"___syscall333":___syscall333,"___syscall334":___syscall334,"___syscall337":___syscall337,"___syscall34":___syscall34,"___syscall340":___syscall340,"___syscall345":___syscall345,"___syscall36":___syscall36,"___syscall38":___syscall38,"___syscall39":___syscall39,"___syscall4":___syscall4,"___syscall40":___syscall40,"___syscall41":___syscall41,"___syscall5":___syscall5,"___syscall51":___syscall51,"___syscall54":___syscall54,"___syscall57":___syscall57,"___syscall6":___syscall6,"___syscall60":___syscall60,"___syscall63":___syscall63,"___syscall64":___syscall64,"___syscall66":___syscall66,"___syscall75":___syscall75,"___syscall77":___syscall77,"___syscall83":___syscall83,"___syscall85":___syscall85,"___syscall9":___syscall9,"___syscall91":___syscall91,"___syscall94":___syscall94,"___syscall96":___syscall96,"___syscall97":___syscall97,"___unlock":___unlock,"___wait":___wait,"__addDays":__addDays,"__arraySum":__arraySum,"__exit":__exit,"__inet_ntop4_raw":__inet_ntop4_raw,"__inet_ntop6_raw":__inet_ntop6_raw,"__inet_pton4_raw":__inet_pton4_raw,"__inet_pton6_raw":__inet_pton6_raw,"__isLeapYear":__isLeapYear,"__read_sockaddr":__read_sockaddr,"__write_sockaddr":__write_sockaddr,"_clock_gettime":_clock_gettime,"_emscripten_asm_const_i":_emscripten_asm_const_i,"_emscripten_asm_const_ii":_emscripten_asm_const_ii,"_emscripten_asm_const_iiii":_emscripten_asm_const_iiii,"_emscripten_get_now":_emscripten_get_now,"_emscripten_get_now_is_monotonic":_emscripten_get_now_is_monotonic,"_emscripten_memcpy_big":_emscripten_memcpy_big,"_emscripten_run_script":_emscripten_run_script,"_fork":_fork,"_getenv":_getenv,"_getnameinfo":_getnameinfo,"_gmtime_r":_gmtime_r,"_inet_addr":_inet_addr,"_llvm_stackrestore":_llvm_stackrestore,"_llvm_stacksave":_llvm_stacksave,"_nanosleep":_nanosleep,"_pthread_cleanup_pop":_pthread_cleanup_pop,"_pthread_cleanup_push":_pthread_cleanup_push,"_pthread_setcancelstate":_pthread_setcancelstate,"_pthread_sigmask":_pthread_sigmask,"_setitimer":_setitimer,"_sigfillset":_sigfillset,"_strftime":_strftime,"_time":_time,"_usleep":_usleep,"_wait":_wait,"_waitpid":_waitpid,"DYNAMICTOP_PTR":DYNAMICTOP_PTR,"tempDoublePtr":tempDoublePtr,"STACKTOP":STACKTOP,"STACK_MAX":STACK_MAX};var 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abort(what){if(Module["onAbort"]){Module["onAbort"](what)}if(what!==undefined){out(what);err(what);what=JSON.stringify(what)}else{what=""}ABORT=true;EXITSTATUS=1;throw"abort("+what+"). Build with -s ASSERTIONS=1 for more info."}Module["abort"]=abort;if(Module["preInit"]){if(typeof Module["preInit"]=="function")Module["preInit"]=[Module["preInit"]];while(Module["preInit"].length>0){Module["preInit"].pop()()}}var shouldRunNow=true;if(Module["noInitialRun"]){shouldRunNow=false}Module["noExitRuntime"]=true;run() 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /docs/index.wasm: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jacob-baines/wasm_challenge/d91bab1d949030dbb77b34d725232578003a50df/docs/index.wasm -------------------------------------------------------------------------------- /src/challenge_shell.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | lol 7 | 13 | 14 | 15 |

16 |
17 | Instructions:
18 | Enter the correct 7 digit combination and win! 19 |
20 |

21 |

22 | 23 | 24 | 25 |
26 |
27 | 28 | 29 | 30 |
31 |
32 | 33 | 34 | 35 |
36 |
37 | 38 |
39 |
40 |

41 | 57 | {{{ SCRIPT }}} 58 | 59 | 60 | 61 | -------------------------------------------------------------------------------- /src/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * The problem: 3 | * This challenge presents the user with a webpage containing 9 buttons. The 4 | * user must hit the buttons in the right order to "win". The "winning" 5 | * functions should be called in this order: 6 | * 7 | * 1. __syscall80 8 | * 2. __syscall72 9 | * 3. __syscall42 10 | * 4. __syscall18 11 | * 5. the_end 12 | * 6. __syscall12 13 | * 7. __syscall188 14 | * 15 | * Why use the __syscall* names? WASM has a bunch of these built in and since 16 | * function names matter in WASM <-> JS logic, I just decided to go with names 17 | * that blend in. 18 | * 19 | * The answer: 1947482 20 | * 21 | * Suggested solution: 22 | * In theory, a 7 digit number has 9,999,999 possible combinations. However, 23 | * the way this is written actually breaks down to 7, largely independent, key 24 | * presses that have a 1/10 shot of being correct. 25 | * 26 | * Furthermore, successful keypresses *always* result in window.console.log 27 | * being rewritten. If the attacker is able to observe window.console.log (via 28 | * debug console) then they can easily determine which digits transition 29 | * window.console.log to a new function. 30 | * 31 | * The only anti-debug feature at the moment is the "debugger" keyword.However, 32 | * since that logic lives in javascript, the attacker should be able to comment 33 | * that out and fix up the WASM check quite easily. If you understand all of 34 | * this up front, this should take no more than 10 minutes to beat... presumably 35 | * actually reversing all this would take much more time. 36 | * 37 | * 38 | * Official WASM Documentation: 39 | * - https://webassembly.github.io/spec/core/syntax/instructions.html 40 | * - https://github.com/WebAssembly/design/blob/master/BinaryEncoding.md 41 | * 42 | * Toolchain Documentation: 43 | * - https://emscripten.org/index.html 44 | * 45 | * Other Resources: 46 | * - https://i.blackhat.com/us-18/Thu-August-9/us-18-Lukasiewicz-WebAssembly-A-New-World-of-Native_Exploits-On-The-Web-wp.pdf 47 | * - https://www.pnfsoftware.com/reversing-wasm.pdf 48 | * - https://wasdk.github.io/WasmFiddle/ 49 | * 50 | * Compiling WASM snippets: 51 | * emcc -O3 -s ONLY_MY_CODE=1 -s WASM=1 -s EXTRA_EXPORTED_RUNTIME_METHODS='["ccall"]' main.c -o main.html 52 | * wasm-strip main.wasm 53 | * 54 | * Modifying wat and dumping WASM to C array: 55 | * wasm2wat main.wasm > main.wat 56 | * ... write custom wat in main.wat ... 57 | * wat2wasm main.wat -o lol.wasm 58 | * xxd -i ./lol.wasm 59 | */ 60 | 61 | #include 62 | #include 63 | #include 64 | #include 65 | #include 66 | 67 | // Tracks the time at which __syscall80 was visited. 68 | static int first_press = 0; 69 | 70 | // Stored indirect call here to be annoying 71 | static void (*g_func_ptr)() = 0; 72 | 73 | // Have we stored log in assert? 74 | static int log_stored = 0; 75 | 76 | /** 77 | * Executes the debugger keyword in javascript. If the console is up then it 78 | * will cause the program to pause and the user will have to click through. If 79 | * we detect this behavior, restore the default console.log 80 | */ 81 | static int debugger_check() 82 | { 83 | int before = time(NULL); 84 | EM_ASM( 85 | { 86 | debugger; 87 | }); 88 | int after = time(NULL); 89 | if ((after - before) != 0) 90 | { 91 | if (log_stored == 1) 92 | { 93 | EM_ASM( 94 | { 95 | delete window['console']['log']; 96 | window['console']['log'] = window['console']['assert']; 97 | }); 98 | } 99 | return 1; 100 | } 101 | return 0; 102 | } 103 | 104 | /** 105 | * hello is the first function to execute. It fires before main(). It has three 106 | * key responsibilities: 107 | * 108 | * 1. Check for the developer console via the javascript debugger keyword. 109 | * 2. Inspect the function that executes debugger to see if its been modified. 110 | * 3. Overwrite console.log to point to __syscall80. 111 | * 112 | * This function is also called when the attacker fails to guess the correct 113 | * digit. I imagine subversion of this function would be quite bad. 114 | */ 115 | static void hello() 116 | { 117 | // check for dev console. 118 | if (debugger_check() == 1) 119 | { 120 | return; 121 | } 122 | 123 | // the expected value of ASM_CONSTS[0]. 124 | char expected[] = "function(){debugger}"; 125 | 126 | // check to see if the debugger logic was modified 127 | int result = EM_ASM_INT( 128 | { 129 | var check_js = ASM_CONSTS[0].toString(); 130 | var expected = AsciiToString($0); 131 | return check_js == expected; 132 | }, expected); 133 | 134 | if (result != 1) 135 | { 136 | if (log_stored == 1) 137 | { 138 | EM_ASM( 139 | { 140 | delete window['console']['log']; 141 | window['console']['log'] = window['console']['assert']; 142 | }); 143 | } 144 | return; 145 | } 146 | 147 | // reset console.log 148 | log_stored = 1; 149 | EM_ASM( 150 | { 151 | window['console']['assert'] = window['console']['log']; 152 | window['console']['log'] = function(param) 153 | { 154 | var result = Module.ccall('__syscall80', 'void', ['number'], [param]); 155 | } 156 | }); 157 | } 158 | 159 | /* 160 | * This is the first digit logic. Basically, if the first digit is 1 then 161 | * overwrite console.log with the next handler. Otherwise, reset using hello. 162 | */ 163 | static void call_me_indirectly(int p_value) 164 | { 165 | if (p_value == 1) 166 | { 167 | EM_ASM( 168 | { 169 | window['console']['log'] = function(param) 170 | { 171 | var result = Module.ccall('__syscall72', 'void', ['number'], [param]); 172 | } 173 | }); 174 | } 175 | else 176 | { 177 | hello(); 178 | } 179 | } 180 | 181 | /* 182 | * This is the first digit handler. Indirectly call call_me_indirectly. Just to be 183 | * annoying. p_value is the value passed into "console.log" 184 | */ 185 | void EMSCRIPTEN_KEEPALIVE __syscall80(int p_value) 186 | { 187 | // check for dev console. 188 | if (debugger_check() == 1) 189 | { 190 | return; 191 | } 192 | 193 | // this is the first half of my bad anti-automation logic. Basically, 194 | // store the time of the first keypress. Check time at later keypresses 195 | // to determine if the button pressing is being automated. 196 | first_press = time(NULL); 197 | 198 | // call call_me_indirectly based on index in the lookup table 199 | g_func_ptr(p_value); 200 | } 201 | 202 | /* 203 | * This is the second digit handler. In this one, we hold WASM byte code in 204 | * a javascript array. The WASM just checks the pressed key is 9. We load 205 | * the byte code and execute it. Simple! 206 | */ 207 | void EMSCRIPTEN_KEEPALIVE __syscall72(int p_value) 208 | { 209 | int result = EM_ASM_INT( 210 | { 211 | /** 212 | * int oh_no(int p_pressed_key) { 213 | * if (p_pressed_key == 9) { 214 | * return 1; 215 | * } 216 | * return 0; 217 | * } 218 | */ 219 | var wasm = new Uint8Array([ 220 | 0,97,115,109,1,0,0,0,1,134,128,128,128,0,1,96,1,127,1,127,3,130, 221 | 128,128,128,0,1,0,4,132,128,128,128,0,1,112,0,0,5,131,128,128, 222 | 128,0,1,0,1,6,129,128,128,128,0,0,7,146,128,128,128,0,2,6,109, 223 | 101,109,111,114,121,2,0,5,111,104,95,110,111,0,0,10,141,128,128, 224 | 128,0,1,135,128,128,128,0,0,32,0,65,9,70,11 225 | ]); 226 | 227 | var module = new WebAssembly.Module(wasm); 228 | var module_instance = new WebAssembly.Instance(module); 229 | var result = module_instance.exports.oh_no($0); 230 | return result; 231 | }, p_value); 232 | 233 | if (result == 1) 234 | { 235 | EM_ASM( 236 | { 237 | window['console']['log'] = function(param) 238 | { 239 | var result = Module.ccall('__syscall42', 'void', ['number'], [param]); 240 | } 241 | }); 242 | } 243 | else 244 | { 245 | hello(); 246 | } 247 | } 248 | 249 | /* 250 | * This is the third digit handler. In this one, we hold WASM byte code in 251 | * a C array. This changes where it's stored in memory compared to the second 252 | * digit handler. The WASM just checks the pressed key is 4. Passing memory 253 | * into javascript is weird so we have to read the entire thing into a uint8array 254 | * before we can load and execute. 255 | */ 256 | void EMSCRIPTEN_KEEPALIVE __syscall42(int p_value) 257 | { 258 | /* 259 | * int oh_no(int p_pressed_key) { 260 | * if (p_pressed_key == 4) { 261 | * return 1; 262 | * } 263 | * return 0; 264 | * } 265 | */ 266 | const char wasm[43] = 267 | { 268 | 0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x06, 0x01, 0x60, 269 | 0x01, 0x7f, 0x01, 0x7f, 0x03, 0x02, 0x01, 0x00, 0x07, 0x0a, 0x01, 0x06, 270 | 0x5f, 0x6f, 0x68, 0x5f, 0x6e, 0x6f, 0x00, 0x00, 0x0a, 0x09, 0x01, 0x07, 271 | 0x00, 0x20, 0x00, 0x41, 0x04, 0x46, 0x0b 272 | }; 273 | 274 | int result = EM_ASM_INT( 275 | { 276 | // read the C array into a uint8array 277 | var wasm_array = new Uint8Array($2); 278 | for (var i = 0; i < $2; i++) 279 | { 280 | wasm_array[i] = getValue($1 + i); 281 | } 282 | 283 | // compile and execute 284 | var module = new WebAssembly.Module(wasm_array); 285 | var module_instance = new WebAssembly.Instance(module); 286 | var result = module_instance.exports._oh_no($0); 287 | return result; 288 | }, p_value, wasm, 43); 289 | 290 | if (result == 1) 291 | { 292 | EM_ASM( 293 | { 294 | window['console']['log'] = function(param) 295 | { 296 | var result = Module.ccall('__syscall18', 'void', ['number'], [param]); 297 | } 298 | }); 299 | } 300 | else 301 | { 302 | hello(); 303 | } 304 | } 305 | 306 | /* 307 | * This is the fourth digit handler. In this one, we hold xor obfuscated WASM 308 | * byte code in a C array.The C array is deobfuscated before being passed into 309 | * the javascript. 310 | */ 311 | void EMSCRIPTEN_KEEPALIVE __syscall18(int p_value) 312 | { 313 | /* 314 | * int oh_no(int p_pressed_key) { 315 | * if (p_pressed_key == 7) { 316 | * return 1; 317 | * } 318 | * return 0; 319 | * } 320 | */ 321 | char wasm[97] = 322 | { 323 | 170,203,217,199,171,170,170,170,171,44,42,42,42,170,171,202, 324 | 171,213,171,213,169,40,42,42,42,170,171,170,174,46,42,42, 325 | 42,170,171,218,170,170,175,41,42,42,42,170,171,170,171,172, 326 | 43,42,42,42,170,170,173,56,42,42,42,170,168,172,199,207, 327 | 199,197,216,211,168,170,175,197,194,245,196,197,170,170,160,39, 328 | 42,42,42,170,171,45,42,42,42,170,170,138,170,235,173,236, 329 | 161, 330 | }; 331 | 332 | for (int i = 0; i < 97; i++) 333 | { 334 | wasm[i] = (wasm[i] ^ 0xaa) & 0xff; 335 | } 336 | 337 | int result = EM_ASM_INT( 338 | { 339 | // read the C array into a uint8array 340 | var wasm_array = new Uint8Array($2); 341 | for (var i = 0; i < $2; i++) 342 | { 343 | wasm_array[i] = getValue($1 + i); 344 | } 345 | 346 | // compile and execute 347 | var module = new WebAssembly.Module(wasm_array); 348 | var module_instance = new WebAssembly.Instance(module); 349 | var result = module_instance.exports.oh_no($0); 350 | return result; 351 | }, p_value, wasm, 97); 352 | 353 | if (result == 1) 354 | { 355 | EM_ASM( 356 | { 357 | window['console']['log'] = function(param) 358 | { 359 | var result = Module.ccall('the_end', 'void', ['number'], [param]); 360 | } 361 | }); 362 | } 363 | else 364 | { 365 | hello(); 366 | } 367 | } 368 | 369 | /*! 370 | * 371 | * This is the fifth digit handler. The attacker has gotten 4/6 digits! If the 372 | * attacker fails to get this one right then we'll restore console.log to its 373 | * normal state and execute "lol_wasm" which is just a module that uses the 374 | * unreachable opcode. Unreachable just triggers a runtime error. Note that 375 | * restoring the console affectively means the attacker can't interact with the 376 | * wasm code whereas the unreachable thing is just silliness. 377 | * 378 | * This code has a little false flag, "you did it" in it. That is dead code. 379 | * 380 | * This function features two WASM byte code payloads. The first is a simple 381 | * xor deobfuscation and the other is an xor obfuscated payload. All of that 382 | * is held in javascript. 383 | * 384 | * This function also does a check to see if digits are being pressed quickly. 385 | * I, a human person, have triggered this logic. But I've also hit the number 386 | * combination many many times. So I'm fine with it. 387 | */ 388 | void EMSCRIPTEN_KEEPALIVE the_end(int p_value) 389 | { 390 | int result = 0; 391 | int are_you_a_bot = time(NULL); 392 | if ((are_you_a_bot - first_press) > 1) 393 | { 394 | result = EM_ASM_INT( 395 | { 396 | /* 397 | * int g_func_ptr(int test) { 398 | * return test ^ 0xbb; 399 | * } 400 | */ 401 | var xor_decode = new Uint8Array([ 402 | 0,97,115,109,1,0,0,0,1,134,128,128,128,0,1,96, 403 | 1,127,1,127,3,130,128,128,128,0,1,0,4,132,128, 404 | 128,128,0,1,112,0,0,5,131,128,128,128,0,1,0,1, 405 | 6,129,128,128,128,0,0,7,147,128,128,128,0,2,6, 406 | 109,101,109,111,114,121,2,0,6,108,111,108,119, 407 | 97,116,0,0,10,142,128,128,128,0,1,136,128,128, 408 | 128,0,0,32,0,65,187,1,115,11 409 | ]); 410 | 411 | /* 412 | * int lolwat(int p_value) { 413 | * if (p_value == 4) { 414 | * return 1; 415 | * } 416 | * return 0; 417 | *} 418 | */ 419 | var wasmCode = new Uint8Array([ 420 | 187,218,200,214,186,187,187,187,186,61,59,59,59,187,186,219, 421 | 186,196,186,196,184,57,59,59,59,187,186,187,191,63,59,59, 422 | 59,187,186,203,187,187,190,56,59,59,59,187,186,187,186,189, 423 | 58,59,59,59,187,187,188,47,59,59,59,187,185,189,214,222, 424 | 214,212,201,194,185,187,188,204,222,207,200,218,213,223,187,187, 425 | 177,54,59,59,59,187,186,60,59,59,59,187,187,155,187,250, 426 | 191,253,176 427 | ]); 428 | 429 | var xor_module = new WebAssembly.Module(xor_decode); 430 | var xor_instance = new WebAssembly.Instance(xor_module); 431 | 432 | for (var i = 0; i < wasmCode.length; i++) 433 | { 434 | wasmCode[i] = xor_instance.exports.lolwat(wasmCode[i]); 435 | } 436 | 437 | var module = new WebAssembly.Module(wasmCode); 438 | var module_instance = new WebAssembly.Instance(module); 439 | var result = module_instance.exports.wetsand($0); 440 | return result; 441 | }, p_value); 442 | } 443 | 444 | if (result == 1) 445 | { 446 | EM_ASM( 447 | { 448 | window['console']['log'] = function(param) 449 | { 450 | var result = Module.ccall('__syscall12', 'void', ['number'], [param]); 451 | } 452 | }); 453 | } 454 | else 455 | { 456 | /* 457 | ( module * 458 | ( type (;0;) (func (param i32) (*result i32))) 459 | (func (;0;) (type 0) (param i32) (result i32) 460 | unreachable) 461 | (export "_stage_one" (func 0))) 462 | */ 463 | unsigned char __lol_wasm[43] = { 464 | 0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x06, 0x01, 0x60, 465 | 0x01, 0x7f, 0x01, 0x7f, 0x03, 0x02, 0x01, 0x00, 0x07, 0x0e, 0x01, 0x0a, 466 | 0x5f, 0x73, 0x74, 0x61, 0x67, 0x65, 0x5f, 0x6f, 0x6e, 0x65, 0x00, 0x00, 467 | 0x0a, 0x05, 0x01, 0x03, 0x00, 0x00, 0x0b 468 | }; 469 | int result = EM_ASM_INT( 470 | { 471 | try 472 | { 473 | // read the C array into a uint8array 474 | var wasm_array = new Uint8Array($1); 475 | for (var i = 0; i < $1; i++) 476 | { 477 | wasm_array[i] = getValue($0 + i); 478 | } 479 | 480 | // restore console log. disable console error. The challenger won't 481 | // will need to refresh the page to get back to the WASM code. 482 | delete window['console']['log']; 483 | window['console']['log'] = window['console']['assert']; 484 | 485 | // compile and execute 486 | var module = new WebAssembly.Module(wasm_array); 487 | var module_instance = new WebAssembly.Instance(module); 488 | module_instance.exports._stage_one($0); 489 | 490 | // this is dead code. 491 | important = $2; 492 | alert("Whoa! You got it! Email the 7 digit code to solvedthechallenge@tenable.com"); 493 | } 494 | catch(err) 495 | { 496 | // suppress error 497 | } 498 | }, __lol_wasm, 43, call_me_indirectly); 499 | } 500 | } 501 | 502 | /* 503 | * With two digits left there is no need to get crazy. It's a trivial brute 504 | * force at this point. This is some very basic bit manipulation to isolate "8" 505 | */ 506 | void EMSCRIPTEN_KEEPALIVE __syscall12(int p_value) 507 | { 508 | if ((p_value & 0x03) == 0 && (p_value & 0x04) == 0 && (p_value >> 3) == 1) 509 | { 510 | EM_ASM( 511 | { 512 | window['console']['log'] = function(param) 513 | { 514 | var result = Module.ccall('__syscall188', 'void', ['number'], [param]); 515 | } 516 | }); 517 | } 518 | else 519 | { 520 | // reset 521 | hello(); 522 | } 523 | } 524 | 525 | /* 526 | * As previously stated, this is so easy to brute force that no effort really 527 | * needs to be made here. I've hidden the final alert in a base64'd string. It 528 | * reads: 529 | * 530 | * alert("Whoa! You got it! Email the 7 digit code to jbaines@tenable.com"); 531 | */ 532 | void EMSCRIPTEN_KEEPALIVE __syscall188(int p_value) 533 | { 534 | if (p_value == 2) 535 | { 536 | emscripten_run_script("eval(atob('YWxlcnQoJ0dvb2Qgam9iISBZb3UgZGlkIGl0ISBZb3VyIHByaXplIGlzIHRoZSBzYXRpc2ZhY3Rpb24gb2YgYSBqb2Igd2VsbCBkb25lLiBDb25ncmF0cyEnKTs='))"); 537 | } 538 | 539 | // reset 540 | hello(); 541 | } 542 | 543 | int main(int p_argc, char** p_argv) 544 | { 545 | // the javascript glue invokes the script this way. 546 | if (p_argc != 1 || strcmp(p_argv[0], "./this.program") != 0) 547 | { 548 | EM_ASM( 549 | { 550 | delete window['console']['log']; 551 | window['console']['log'] = window['console']['assert']; 552 | exit(0); 553 | }); 554 | } 555 | else 556 | { 557 | // "call_me_indirectly" should be at one given the current code layout. 558 | g_func_ptr = 1; 559 | } 560 | 561 | return EXIT_SUCCESS; 562 | } 563 | --------------------------------------------------------------------------------