Creates a sha1 hash from a password or any string in javascript.

sha1PasswordHash.js

function sha1(msg)
{
  function rotl(n,s) { return n<<s|n>>>32-s; };
  function tohex(i) { for(var h="", s=28;;s-=4) { h+=(i>>>s&0xf).toString(16); if(!s) return h; } };
  var H0=0x67452301, H1=0xEFCDAB89, H2=0x98BADCFE, H3=0x10325476, H4=0xC3D2E1F0, M=0x0ffffffff; 
  var i, t, W=new Array(80), ml=msg.length, wa=new Array();
  msg += fcc(0x80);
  while(msg.length%4) msg+=fcc(0);
  for(i=0;i<msg.length;i+=4) wa.push(msg.cca(i)<<24|msg.cca(i+1)<<16|msg.cca(i+2)<<8|msg.cca(i+3));
  while(wa.length%16!=14) wa.push(0);
  wa.push(ml>>>29),wa.push((ml<<3)&M);
  for( var bo=0;bo<wa.length;bo+=16 ) {
    for(i=0;i<16;i++) W[i]=wa[bo+i];
    for(i=16;i<=79;i++) W[i]=rotl(W[i-3]^W[i-8]^W[i-14]^W[i-16],1);
    var A=H0, B=H1, C=H2, D=H3, E=H4;
    for(i=0 ;i<=19;i++) t=(rotl(A,5)+(B&C|~B&D)+E+W[i]+0x5A827999)&M, E=D, D=C, C=rotl(B,30), B=A, A=t;
    for(i=20;i<=39;i++) t=(rotl(A,5)+(B^C^D)+E+W[i]+0x6ED9EBA1)&M, E=D, D=C, C=rotl(B,30), B=A, A=t;
    for(i=40;i<=59;i++) t=(rotl(A,5)+(B&C|B&D|C&D)+E+W[i]+0x8F1BBCDC)&M, E=D, D=C, C=rotl(B,30), B=A, A=t;
    for(i=60;i<=79;i++) t=(rotl(A,5)+(B^C^D)+E+W[i]+0xCA62C1D6)&M, E=D, D=C, C=rotl(B,30), B=A, A=t;
    H0=H0+A&M;H1=H1+B&M;H2=H2+C&M;H3=H3+D&M;H4=H4+E&M;
  }
  return tohex(H0)+tohex(H1)+tohex(H2)+tohex(H3)+tohex(H4);
}