diff --git a/Time-based-One-Time-Password/README.md b/Time-based-One-Time-Password/README.md
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@@ -0,0 +1,23 @@
+## Desc
+
+A time-based one-time password algorithm(TOTP), implemented entirely 100% in Javascript. 
+
+This script complies with [RFC6238](https://datatracker.ietf.org/doc/html/rfc6238) specification and can be run in Surge, QuantumultX, Loon, Shadowrocket.
+
+
+
+## Usage
+
+```javascript
+const key = 'YOURCLIENTTOKEN'; //TOTP key
+const totp = TOTP(key); //Return a six-digit one-time password.
+
+console.log(totp); //Print log
+```
+
+
+
+## Acknowledgements
+
+This script is adapted from https://jsfiddle.net/russau/rbyjk774 and uses Brian Turek's [jsSHA](https://github.com/caligatio/jsSHA/).
+
diff --git a/Time-based-One-Time-Password/TOTP.min.js b/Time-based-One-Time-Password/TOTP.min.js
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+++ b/Time-based-One-Time-Password/TOTP.min.js
@@ -0,0 +1 @@
+function TOTP(token){function t(e,a,d){var g=0,c=[],b=0,f,k,l,h,m,w,n,y,p=!1,q=[],t=[],v,u=!1;d=d||{};f=d.encoding||"UTF8";v=d.numRounds||1;l=z(a,f);if(v!==parseInt(v,10)||1>v)throw Error("numRounds must a integer >= 1");if("SHA-1"===e)m=512,w=A,n=H,h=160,y=function(a){return a.slice()};else throw Error("Chosen SHA variant is not supported");k=x(e);this.setHMACKey=function(a,b,c){var d;if(!0===p)throw Error("HMAC key already set");if(!0===u)throw Error("Cannot set HMAC key after calling update");f=(c||{}).encoding||"UTF8";b=z(b,f)(a);a=b.binLen;b=b.value;d=m>>>3;c=d/4-1;if(d<a/8){for(b=n(b,a,0,x(e),h);b.length<=c;)b.push(0);b[c]&=4294967040}else if(d>a/8){for(;b.length<=c;)b.push(0);b[c]&=4294967040}for(a=0;a<=c;a+=1)q[a]=b[a]^909522486,t[a]=b[a]^1549556828;k=w(q,k);g=m;p=!0};this.update=function(a){var d,e,f,h=0,n=m>>>5;d=l(a,c,b);a=d.binLen;e=d.value;d=a>>>5;for(f=0;f<d;f+=n)h+m<=a&&(k=w(e.slice(f,f+n),k),h+=m);g+=h;c=e.slice(h>>>5);b=a%m;u=!0};this.getHash=function(a,d){var f,l,m,r;if(!0===p)throw Error("Cannot call getHash after setting HMAC key");m=B(d);switch(a){case"HEX":f=function(a){return C(a,h,m)};break;case"B64":f=function(a){return D(a,h,m)};break;case"BYTES":f=function(a){return E(a,h)};break;case"ARRAYBUFFER":try{l=new ArrayBuffer(0)}catch(I){throw Error("ARRAYBUFFER not supported by this environment");}f=function(a){return F(a,h)};break;default:throw Error("format must be HEX, B64, BYTES, or ARRAYBUFFER");}r=n(c.slice(),b,g,y(k),h);for(l=1;l<v;l+=1)r=n(r,h,0,x(e),h);return f(r)};this.getHMAC=function(a,d){var f,l,q,r;if(!1===p)throw Error("Cannot call getHMAC without first setting HMAC key");q=B(d);switch(a){case"HEX":f=function(a){return C(a,h,q)};break;case"B64":f=function(a){return D(a,h,q)};break;case"BYTES":f=function(a){return E(a,h)};break;case"ARRAYBUFFER":try{f=new ArrayBuffer(0)}catch(I){throw Error("ARRAYBUFFER not supported by this environment");}f=function(a){return F(a,h)};break;default:throw Error("outputFormat must be HEX, B64, BYTES, or ARRAYBUFFER");}l=n(c.slice(),b,g,y(k),h);r=w(t,x(e));r=n(l,h,m,r,h);return f(r)}}function J(e,a,d){var g=e.length,c,b,f,k,l;a=a||[0];d=d||0;l=d>>>3;if(0!==g%2)throw Error("String of HEX type must be in byte increments");for(c=0;c<g;c+=2){b=parseInt(e.substr(c,2),16);if(isNaN(b))throw Error("String of HEX type contains invalid characters");k=(c>>>1)+l;for(f=k>>>2;a.length<=f;)a.push(0);a[f]|=b<<8*(3-k%4)}return{value:a,binLen:4*g+d}}function K(e,a,d){var g=[],c,b,f,k,g=a||[0];d=d||0;b=d>>>3;for(c=0;c<e.length;c+=1)a=e.charCodeAt(c),k=c+b,f=k>>>2,g.length<=f&&g.push(0),g[f]|=a<<8*(3-k%4);return{value:g,binLen:8*e.length+d}}function L(e,a,d){var g=[],c=0,b,f,k,l,h,m,g=a||[0];d=d||0;a=d>>>3;if(-1===e.search(/^[a-zA-Z0-9=+\/]+$/))throw Error("Invalid character in base-64 string");f=e.indexOf("=");e=e.replace(/\=/g,"");if(-1!==f&&f<e.length)throw Error("Invalid '=' found in base-64 string");for(f=0;f<e.length;f+=4){h=e.substr(f,4);for(k=l=0;k<h.length;k+=1)b="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf(h[k]),l|=b<<18-6*k;for(k=0;k<h.length-1;k+=1){m=c+a;for(b=m>>>2;g.length<=b;)g.push(0);g[b]|=(l>>>16-8*k&255)<<8*(3-m%4);c+=1}}return{value:g,binLen:8*c+d}}function M(e,a,d){var g=[],c,b,f,g=a||[0];d=d||0;c=d>>>3;for(a=0;a<e.byteLength;a+=1)f=a+c,b=f>>>2,g.length<=b&&g.push(0),g[b]|=e[a]<<8*(3-f%4);return{value:g,binLen:8*e.byteLength+d}}function C(e,a,d){var g="";a/=8;var c,b;for(c=0;c<a;c+=1)b=e[c>>>2]>>>8*(3-c%4),g+="0123456789abcdef".charAt(b>>>4&15)+"0123456789abcdef".charAt(b&15);return d.outputUpper?g.toUpperCase():g}function D(e,a,d){var g="",c=a/8,b,f,k;for(b=0;b<c;b+=3)for(f=b+1<c?e[b+1>>>2]:0,k=b+2<c?e[b+2>>>2]:0,k=(e[b>>>2]>>>8*(3-b%4)&255)<<16|(f>>>8*(3-(b+1)%4)&255)<<8|k>>>8*(3-(b+2)%4)&255,f=0;4>f;f+=1)8*b+6*f<=a?g+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".charAt(k>>>6*(3-f)&63):g+=d.b64Pad;return g}function E(e,a){var d="",g=a/8,c,b;for(c=0;c<g;c+=1)b=e[c>>>2]>>>8*(3-c%4)&255,d+=String.fromCharCode(b);return d}function F(e,a){var d=a/8,g,c=new ArrayBuffer(d);for(g=0;g<d;g+=1)c[g]=e[g>>>2]>>>8*(3-g%4)&255;return c}function B(e){var a={outputUpper:!1,b64Pad:"=",shakeLen:-1};e=e||{};a.outputUpper=e.outputUpper||!1;!0===e.hasOwnProperty("b64Pad")&&(a.b64Pad=e.b64Pad);if("boolean"!==typeof a.outputUpper)throw Error("Invalid outputUpper formatting option");if("string"!==typeof a.b64Pad)throw Error("Invalid b64Pad formatting option");return a}function z(e,a){var d;switch(a){case"UTF8":case"UTF16BE":case"UTF16LE":break;default:throw Error("encoding must be UTF8, UTF16BE, or UTF16LE");}switch(e){case"HEX":d=J;break;case"TEXT":d=function(d,c,b){var f=[],e=[],l=0,h,m,q,n,p,f=c||[0];c=b||0;q=c>>>3;if("UTF8"===a)for(h=0;h<d.length;h+=1)for(b=d.charCodeAt(h),e=[],128>b?e.push(b):2048>b?(e.push(192|b>>>6),e.push(128|b&63)):55296>b||57344<=b?e.push(224|b>>>12,128|b>>>6&63,128|b&63):(h+=1,b=65536+((b&1023)<<10|d.charCodeAt(h)&1023),e.push(240|b>>>18,128|b>>>12&63,128|b>>>6&63,128|b&63)),m=0;m<e.length;m+=1){p=l+q;for(n=p>>>2;f.length<=n;)f.push(0);f[n]|=e[m]<<8*(3-p%4);l+=1}else if("UTF16BE"===a||"UTF16LE"===a)for(h=0;h<d.length;h+=1){b=d.charCodeAt(h);"UTF16LE"===a&&(m=b&255,b=m<<8|b>>>8);p=l+q;for(n=p>>>2;f.length<=n;)f.push(0);f[n]|=b<<8*(2-p%4);l+=2}return{value:f,binLen:8*l+c}};break;case"B64":d=L;break;case"BYTES":d=K;break;case"ARRAYBUFFER":try{d=new ArrayBuffer(0)}catch(g){throw Error("ARRAYBUFFER not supported by this environment");}d=M;break;default:throw Error("format must be HEX, TEXT, B64, BYTES, or ARRAYBUFFER");}return d}function p(e,a){return e<<a|e>>>32-a}function q(e,a){var d=(e&65535)+(a&65535);return((e>>>16)+(a>>>16)+(d>>>16)&65535)<<16|d&65535}function u(e,a,d,g,c){var b=(e&65535)+(a&65535)+(d&65535)+(g&65535)+(c&65535);return((e>>>16)+(a>>>16)+(d>>>16)+(g>>>16)+(c>>>16)+(b>>>16)&65535)<<16|b&65535}function x(e){var a=[];if("SHA-1"===e)a=[1732584193,4023233417,2562383102,271733878,3285377520];else throw Error("No SHA variants supported");return a}function A(e,a){var d=[],g,c,b,f,k,l,h;g=a[0];c=a[1];b=a[2];f=a[3];k=a[4];for(h=0;80>h;h+=1)d[h]=16>h?e[h]:p(d[h-3]^d[h-8]^d[h-14]^d[h-16],1),l=20>h?u(p(g,5),c&b^~c&f,k,1518500249,d[h]):40>h?u(p(g,5),c^b^f,k,1859775393,d[h]):60>h?u(p(g,5),c&b^c&f^b&f,k,2400959708,d[h]):u(p(g,5),c^b^f,k,3395469782,d[h]),k=f,f=b,b=p(c,30),c=g,g=l;a[0]=q(g,a[0]);a[1]=q(c,a[1]);a[2]=q(b,a[2]);a[3]=q(f,a[3]);a[4]=q(k,a[4]);return a}function H(e,a,d,g){var c;for(c=(a+65>>>9<<4)+15;e.length<=c;)e.push(0);e[a>>>5]|=128<<24-a%32;a+=d;e[c]=a&4294967295;e[c-1]=a/4294967296|0;a=e.length;for(c=0;c<a;c+=16)g=A(e.slice(c,c+16),g);return g}function X(y){return(y<15.5?'0':'')+Math.round(y).toString(16)}function V(b){var s="ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";var t="";var h="";for(var i=0;i<b.length;i++){var val=s.indexOf(b.charAt(i).toUpperCase());t+=T(val.toString(2),5,'0')}for(var i=0;i+4<=t.length;i+=4){var c=t.substr(i,4);h=h+parseInt(c,2).toString(16)}return h}function T(s,l,p){if(l+1>=s.length){s=Array(l+1-s.length).join(p)+s}return s}return(function(s){var k=V(s);var e=Math.round(new Date().getTime()/1000.0);var r=T(X(Math.floor(e/30)),16,'0');var j=new t("SHA-1","HEX");j.setHMACKey(k,"HEX");j.update(r);var h=j.getHMAC("HEX");var o=parseInt(h.substring(h.length-1),16);var p=(parseInt(h.substr(o*2,8),16)&parseInt('7fffffff',16))+'';var z=p.substr(p.length-6,6);return z})(token)};
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