add key pairs for encryption, as well as better styling for posts page

js/RSA.js

@@ -0,0 +1,38 @@
+
+var RSAAPP={};RSAAPP.NoPadding="NoPadding";RSAAPP.PKCS1Padding="PKCS1Padding";RSAAPP.RawEncoding="RawEncoding";RSAAPP.NumericEncoding="NumericEncoding"
+function RSAKeyPair(encryptionExponent,decryptionExponent,modulus,keylen)
+{this.e=biFromHex(encryptionExponent);this.d=biFromHex(decryptionExponent);this.m=biFromHex(modulus);if(typeof(keylen)!='number'){this.chunkSize=2*biHighIndex(this.m);}
+else{this.chunkSize=keylen/8;}
+this.radix=16;this.barrett=new BarrettMu(this.m);}
+function encryptedString(key,s,pad,encoding)
+{var a=new Array();var sl=s.length;var i,j,k;var padtype;var encodingtype;var rpad;var al;var result="";var block;var crypt;var text;if(typeof(pad)=='string'){if(pad==RSAAPP.NoPadding){padtype=1;}
+else if(pad==RSAAPP.PKCS1Padding){padtype=2;}
+else{padtype=0;}}
+else{padtype=0;}
+if(typeof(encoding)=='string'&&encoding==RSAAPP.RawEncoding){encodingtype=1;}
+else{encodingtype=0;}
+if(padtype==1){if(sl>key.chunkSize){sl=key.chunkSize;}}
+else if(padtype==2){if(sl>(key.chunkSize-11)){sl=key.chunkSize-11;}}
+i=0;if(padtype==2){j=sl-1;}
+else{j=key.chunkSize-1;}
+while(i<sl){if(padtype){a[j]=s.charCodeAt(i);}
+else{a[i]=s.charCodeAt(i);}
+i++;j--;}
+if(padtype==1){i=0;}
+j=key.chunkSize-(sl%key.chunkSize);while(j>0){if(padtype==2){rpad=Math.floor(Math.random()*256);while(!rpad){rpad=Math.floor(Math.random()*256);}
+a[i]=rpad;}
+else{a[i]=0;}
+i++;j--;}
+if(padtype==2)
+{a[sl]=0;a[key.chunkSize-2]=2;a[key.chunkSize-1]=0;}
+al=a.length;for(i=0;i<al;i+=key.chunkSize){block=new BigInt();j=0;for(k=i;k<(i+key.chunkSize);++j){block.digits[j]=a[k++];block.digits[j]+=a[k++]<<8;}
+crypt=key.barrett.powMod(block,key.e);if(encodingtype==1){text=biToBytes(crypt);}
+else{text=(key.radix==16)?biToHex(crypt):biToString(crypt,key.radix);}
+result+=text;}
+return result;}
+function decryptedString(key,c)
+{var blocks=c.split(" ");var b;var i,j;var bi;var result="";for(i=0;i<blocks.length;++i){if(key.radix==16){bi=biFromHex(blocks[i]);}
+else{bi=biFromString(blocks[i],key.radix);}
+b=key.barrett.powMod(bi,key.d);for(j=0;j<=biHighIndex(b);++j){result+=String.fromCharCode(b.digits[j]&255,b.digits[j]>>8);}}
+if(result.charCodeAt(result.length-1)==0){result=result.substring(0,result.length-1);}
+return(result);}

js/user.js

@@ -31,7 +31,34 @@ function progressHandler(event) {
   console.log(event.target.responseText);
 }
 
+function getCookie(cname) {
+  let name = cname + "=";
+  let decodedCookie = decodeURIComponent(document.cookie);
+  let ca = decodedCookie.split(';');
+  for(let i = 0; i <ca.length; i++) {
+    let c = ca[i];
+    while (c.charAt(0) == ' ') {
+      c = c.substring(1);
+    }
+    if (c.indexOf(name) == 0) {
+      return c.substring(name.length, c.length);
+    }
+  }
+  return "";
+}
+
+function setCookie(cname, cvalue, exdays) {
+  const d = new Date();
+  d.setTime(d.getTime() + (exdays*24*60*60*1000));
+  let expires = "expires="+ d.toUTCString();
+  document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
+}
+
 async function setuser() {
+  if(getCookie("priv_key") != "") {
+    localStorage.setItem("priv_key",getCookie("priv_key"))
+    setCookie("priv_key","",0)
+  }
   let user = await (await fetch("/api/getuser")).json();
   let username
   let bio