mirror of
https://github.com/altcha-org/altcha.git
synced 2026-01-25 04:16:41 +00:00
2 lines
1.6 KiB
JavaScript
2 lines
1.6 KiB
JavaScript
(function(){"use strict";const f=new TextEncoder;function p(e){return[...new Uint8Array(e)].map(t=>t.toString(16).padStart(2,"0")).join("")}async function w(e,t,r){return p(await crypto.subtle.digest(r.toUpperCase(),f.encode(e+t)))}function b(e,t,r="SHA-256",n=1e6,s=0){const o=new AbortController,a=Date.now();return{promise:(async()=>{for(let c=s;c<=n;c+=1){if(o.signal.aborted)return null;if(await w(t,c,r)===e)return{number:c,took:Date.now()-a}}return null})(),controller:o}}function h(e){const t=atob(e),r=new Uint8Array(t.length);for(let n=0;n<t.length;n++)r[n]=t.charCodeAt(n);return r}function g(e,t=12){const r=new Uint8Array(t);for(let n=0;n<t;n++)r[n]=e%256,e=Math.floor(e/256);return r}async function m(e,t="",r=1e6,n=0){const s="AES-GCM",o=new AbortController,a=Date.now(),l=async()=>{for(let u=n;u<=r;u+=1){if(o.signal.aborted||!c||!y)return null;try{const d=await crypto.subtle.decrypt({name:s,iv:g(u)},c,y);if(d)return{clearText:new TextDecoder().decode(d),took:Date.now()-a}}catch{}}return null};let c=null,y=null;try{y=h(e);const u=await crypto.subtle.digest("SHA-256",f.encode(t));c=await crypto.subtle.importKey("raw",u,s,!1,["decrypt"])}catch{return{promise:Promise.reject(),controller:o}}return{promise:l(),controller:o}}let i;onmessage=async e=>{const{type:t,payload:r,start:n,max:s}=e.data;let o=null;if(t==="abort")i==null||i.abort(),i=void 0;else if(t==="work"){if("obfuscated"in r){const{key:a,obfuscated:l}=r||{};o=await m(l,a,s,n)}else{const{algorithm:a,challenge:l,salt:c}=r||{};o=b(l,c,a,s,n)}i=o.controller,o.promise.then(a=>{self.postMessage(a&&{...a,worker:!0})})}}})();
|