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Daeinar/RC4

Last active August 29, 2015 14:08
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RC4 stream generation with 135 characters of JavaScript
Raw
RC4
<html>
<body>
<style>
html { font-family: monospace; }
</style>
<script language="javascript" type="text/javascript">
// RC4 stream generation in 135 chars
X=(S,K,k,c,l,f)=>{Y=(r,i)=>{j=0;for(x in r)t=S[i],j+=t+k[i%l],S[j%f]=t+(S[i]=S[j%f],0),r.push(S[(S[i++]+t)%f]),i%=f};Y(S,0);k=K;Y(K,1)}
c=4096;
l=16;
f=256;
k=[0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10];
S=[];
K=[];
for(i=0;i<f;i++)S[i]=i;
for(i=0;i<c;i++)K[i]=0;
X(S,K,k,c,l,f);
for(i=0;i<2*c;i++) {
if (i%16==0) {document.write('<br>');}
document.write( ('00'+K[i].toString(16)).substr(-2)+' ');
}
</script>
</body>
</html>
@Daeinar
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Daeinar commented Oct 25, 2014

Uses:
https://stackoverflow.com/questions/16201656/how-to-swap-two-variables-in-javascript

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