Created
June 20, 2021 02:19
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Some crappy string obfuscation thing
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| function _arrayBufferToBase64( buffer ) { | |
| var binary = ''; | |
| var bytes = new Uint8Array( buffer ); | |
| var len = bytes.byteLength; | |
| for (var i = 0; i < len; i++) { | |
| binary += String.fromCharCode( bytes[ i ] ); | |
| } | |
| return window.btoa( binary ); | |
| } | |
| encode = (s) => { | |
| var charmap = [...s].reduce((a,b,c)=>({...a,[b]:[...a[b]||[],c]}),{}); | |
| var sorted = Object.keys(charmap).sort().reduce((o,k)=>({...o,[k]:charmap[k]}),{}); | |
| console.log({charmap, sorted}); | |
| var v = Object.entries(sorted).reduce((a,[b,c])=>[...a,b.charCodeAt(0),c.length,...c],[]); | |
| var a = new Uint8Array(v); | |
| return _arrayBufferToBase64(a); | |
| } | |
| decode = (a) => { | |
| a=atob(a); | |
| var b=''; | |
| var c=0; | |
| return new Uint8Array(a.length) | |
| .map((_,d)=>a.charCodeAt(d)) | |
| .reduce((d,e)=>{ | |
| if(c<0){ | |
| c=e; | |
| return d; | |
| }else if(c===0){ | |
| b=String.fromCharCode(e) | |
| }else{ | |
| f=e; | |
| if(d.length<f+1){ | |
| d=[...d,...new Array(f-d.length),b] | |
| }else{ | |
| d=[...d.slice(0,f),b,...d.slice(f+1)] | |
| } | |
| } | |
| c--; | |
| return d; | |
| }, []).join('') | |
| } | |
| ///////////////////////////////////////////////// | |
| s="put your text here"; | |
| ///////////////////////////////////////////////// | |
| u=encode(s); | |
| c=`(${decode.toString().replace(/;\s*\}/g, '}').replace(/\s+/g, ' ').replace(/\s+([\.\[\]\{\}=])/g,'$1').replace(/([;,=\.\[\]\{\}=])\s+/g,'$1')})(${JSON.stringify(u)})`; | |
| // safety check | |
| decoded=eval(c); if (s!==decoded) { throw new Error(JSON.stringify({decodeFuncError:{decodedTo:decoded,expected:s}})); } | |
| console.log(c) |
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