html: Eliminate strings in Javascript (#5)
eliminate strings in hasher for 15kh/s speed improvement --------- Co-authored-by: Vaxry <vaxry@vaxry.net>
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L95Kdg8bw9U74mUBK9XqBjWlUrS9ksUN
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dd87fda183
@@ -240,16 +240,6 @@
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const challengeSig = "{{ tl:text challengeSignature }}";
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const challengeFingerprint = "{{ tl:text challengeFingerprint }}";
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function valid(sha) {
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const MIN_ZEROES = difficulty;
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for (let i = 0; i < MIN_ZEROES; i += 1) {
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if (sha[i] != '0')
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return false;
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}
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return true;
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}
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function itShort(it) {
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if (it > 1000000)
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return parseInt(it / 100000) / 10 + "M";
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@@ -297,18 +287,25 @@
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});
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}
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const encoder = new TextEncoder();
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while (true) {
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const data = encoder.encode(challengeNonce + it);
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const buffer = await window.crypto.subtle.digest("SHA-256", data);
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const hashArray = Array.from(new Uint8Array(buffer));
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const sha = hashArray
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.map((item) => item.toString(16).padStart(2, "0"))
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.join("");
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const workBuffer = new Uint8Array(challengeNonce.length + 10);
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for (let i = 0; i < challengeNonce.length; i++)
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workBuffer[i] = challengeNonce.charCodeAt(i);
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if (valid(sha)) {
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while (true) {
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const digits = it === 0 ? 1 : (~~Math.floor(Math.log10(it)) + 1);
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for (let i = digits - 1; i >= 0; i--)
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workBuffer[challengeNonce.length + (digits - 1 - i)] = 48 + ~~Math.floor((it / Math.pow(10, i)) % 10);
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const hashedData = new Uint8Array(await window.crypto.subtle.digest('sha-256', workBuffer.slice(0, challengeNonce.length + digits)));
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let zeroPos = 0;
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for (; zeroPos < difficulty; zeroPos++) {
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if ((zeroPos % 2 == 0 ? (hashedData[~~(zeroPos / 2)] >> 4) : (hashedData[~~(zeroPos / 2)] & 0x0F)) != 0)
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break;
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}
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if (zeroPos >= difficulty) {
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success(it);
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console.log("Success: it " + it + ": " + sha);
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console.log("Success: it " + it + ": " + Array.from(hashedData).map((item) => item.toString(16).padStart(2, "0")).join(""));
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break;
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}
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@@ -1,2 +1,2 @@
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<!DOCTYPE html><head><title>STOP! - Checkpoint</title></head><body style="background-color:#0e0e0e;overflow:hidden"><style>@font-face{font-family:"Noto Sans";src:url(/checkpoint/NotoSans.woff)}*{font-family:"Noto Sans"}.middle-box{display:block;position:absolute;width:30rem;height:calc(100% - 2rem);left:calc(50% - 15rem);top:1rem;background-color:#111;border-radius:.5rem;border:1px solid #280d0e}.big-icon{margin:0;padding:0;font-size:8rem;color:#fff;width:100%;text-align:center}.subtext{margin:0;padding:0;font-size:3rem;color:#d9d9d9;width:100%;text-align:center}.text-hr{margin:auto;margin-top:1rem;margin-bottom:1rem;padding:0;background-color:#444;width:50%;box-shadow:none;text-align:center;height:1px;border:none}.text-hr-small{margin:auto;margin-top:1rem;margin-bottom:1rem;padding:0;background-color:#444;width:25%;box-shadow:none;text-align:center;height:1px;border:none}.text-description{margin:0;padding:0;font-size:1rem;color:#d9d9d9;width:85%;margin-left:7.5%;text-align:center}.text-question{margin:0;margin-top:4rem;padding:0;font-size:1.4rem;color:#d9d9d9;width:85%;margin-left:7.5%;text-align:center}.bottom-bar{position:absolute;width:100%;height:auto;bottom:.4rem;left:0}.bottom-hash-text{margin:0;padding:0;font-size:1rem;color:#d9d9d9;width:85%;margin-left:7.5%;text-align:center}.bottom-credit-text{display:block;margin:0;padding:0;font-size:.5rem;color:#4b4b4b;width:98%;text-align:right;transition:ease-in-out .1s;margin-top:.2rem}.bottom-credit-text:hover,.bottom-credit-text:link:hover,.bottom-credit-text:visited:hover{color:#764343;cursor:pointer}.bottom-credit-text:link,.bottom-credit-text:visited{color:#4b4b4b}.bottom-progress{position:relative;height:3px;background-color:#222;width:80%;margin-left:10%;margin-bottom:.8rem}.bottom-progress-light{position:absolute;left:0;top:0;width:0%;height:3px;background-color:#692225;transition:ease-in-out .1s}@media (pointer:none),(pointer:coarse){.big-icon{margin-top:10rem}.middle-box{width:90%;left:5%}.subtext{font-size:6rem}.text-description{font-size:3rem}.text-hr{height:3px}.bottom-hash-text{font-size:2.5rem}.bottom-credit-text{font-size:1rem}}</style><div class="middle-box"><p class="big-icon">🛑</p><p class="subtext" id="subtext">STOP!</p><hr class="text-hr"><p class="text-description">Verifying that you are not a bot. This might take a short moment.<br><br>You do not need to do anything.</p><p class="text-question">Why am I seeing this?</p><hr class="text-hr-small"><p class="text-description">This website protects itself from AI bots and scrapers by asking you to complete a cryptographic challenge before allowing you entry.</p><div class="bottom-bar"><div class="bottom-progress"><div class="bottom-progress-light" name="progress-light"></div></div><p class="bottom-hash-text" id="results">Difficulty {{ tl:text challengeDifficulty }}, elapsed 0ms, 0h, 0h/s</p><a class="bottom-credit-text" href="https://github.com/vaxerski/checkpoint"><i>Powered by checkpoint v{{ tl:text checkpointVersion }}</i></a></div></div>
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<script type="text/javascript">setTimeout(async function(){var e=0,t=Date.now();let n="{{ tl:text challengeNonce }}",l=parseInt("{{ tl:text challengeDifficulty }}");function r(e){let t=l;for(let n=0;n<t;n+=1)if("0"!=e[n])return!1;return!0}function $(e){return e>1e6?parseInt(e/1e5)/10+"M":parseInt(e/100)/10+"k"}function i(e){return e>1e3?parseInt(e/100)/10+"s":e+"ms"}function o(e){return Math.floor((1-1/(Math.pow(e/Math.pow(2,4*l)*3,2)+1))*100)}function c(e){document.getElementById("results").innerHTML="Success! Completed challenge after "+$(e)+" iterations, in "+i(Math.floor(Date.now()-t))+".",document.getElementsByName("progress-light")[0].style.width="100%";let r=JSON.stringify({challenge:n,solution:e,difficulty:l,sig:"{{ tl:text challengeSignature }}",fingerprint:"{{ tl:text challengeFingerprint }}"});fetch("/checkpoint/challenge",{headers:{"Content-Type":"application/json"},method:"POST",body:r}).then(e=>{200==e.status?(console.log("Got token."),window.location.reload()):console.log("Server error")})}let s=new TextEncoder;for(;;){let a=s.encode(n+e),g=await window.crypto.subtle.digest("SHA-256",a),u=Array.from(new Uint8Array(g)),_=u.map(e=>e.toString(16).padStart(2,"0")).join("");if(r(_)){c(e),console.log("Success: it "+e+": "+_);break}if(++e%11377==0){let f=Math.floor(Date.now()-t),h=e/(f/1e3);document.getElementById("results").innerHTML="Difficulty: "+l+", elapsed "+i(f)+", "+$(e)+"h, "+$(h)+"h/s",document.getElementsByName("progress-light")[0].style.width=o(e)+"%"}}},100);var currentTitle=1;setInterval(()=>{let e=["STOP","HALT","STÓJ","ARRÊT","СТІЙ"];document.getElementById("subtext").innerHTML=e[currentTitle]+"!",++currentTitle>=e.length&&(currentTitle=0)},2e3);</script></body>
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<script type="text/javascript">setTimeout(async function(){var e=0,t=Date.now();let l="{{ tl:text challengeNonce }}",n=parseInt("{{ tl:text challengeDifficulty }}");function $(e){return e>1e6?parseInt(e/1e5)/10+"M":parseInt(e/100)/10+"k"}function r(e){return e>1e3?parseInt(e/100)/10+"s":e+"ms"}function o(e){return Math.floor((1-1/(Math.pow(e/Math.pow(2,4*n)*3,2)+1))*100)}function i(e){document.getElementById("results").innerHTML="Success! Completed challenge after "+$(e)+" iterations, in "+r(Math.floor(Date.now()-t))+".",document.getElementsByName("progress-light")[0].style.width="100%";let o=JSON.stringify({challenge:l,solution:e,difficulty:n,sig:"{{ tl:text challengeSignature }}",fingerprint:"{{ tl:text challengeFingerprint }}"});fetch("/checkpoint/challenge",{headers:{"Content-Type":"application/json"},method:"POST",body:o}).then(e=>{200==e.status?(console.log("Got token."),window.location.reload()):console.log("Server error")})}let s=new Uint8Array(l.length+10);for(let _=0;_<l.length;_++)s[_]=l.charCodeAt(_);for(;;){let c=0===e?1:~~Math.floor(Math.log10(e))+1;for(let g=c-1;g>=0;g--)s[l.length+(c-1-g)]=48+~~Math.floor(e/Math.pow(10,g)%10);let a=new Uint8Array(await window.crypto.subtle.digest("sha-256",s.slice(0,l.length+c))),f=0;for(;f<n&&(f%2==0?a[~~(f/2)]>>4:15&a[~~(f/2)])==0;f++);if(f>=n){i(e),console.log("Success: it "+e+": "+Array.from(a).map(e=>e.toString(16).padStart(2,"0")).join(""));break}if(++e%11377==0){let h=Math.floor(Date.now()-t),u=e/(h/1e3);document.getElementById("results").innerHTML="Difficulty: "+n+", elapsed "+r(h)+", "+$(e)+"h, "+$(u)+"h/s",document.getElementsByName("progress-light")[0].style.width=o(e)+"%"}}},100);var currentTitle=1;setInterval(()=>{let e=["STOP","HALT","STÓJ","ARRÊT","СТІЙ"];document.getElementById("subtext").innerHTML=e[currentTitle]+"!",++currentTitle>=e.length&&(currentTitle=0)},2e3);</script></body>
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