ASP.NET Membership password hash for Node.js

dotNetPassHash

var crypto = require('crypto');

console.log(dotnet_membership_password_hash("welcome1", "qkI2wRPSW7Y4ArqWkfHm5g==")); // W25/z6MAywBax7DITuKgSmsXua4=

function dotnet_membership_password_hash(pass, salt)
{
  var bytes = new Buffer(pass || '', 'ucs2');
  var src = new Buffer(salt || '', 'base64');
  var dst = new Buffer(src.length + bytes.length);
  src.copy(dst, 0, 0, src.length);
  bytes.copy(dst, src.length, 0, bytes.length);
  
  return crypto.createHash('sha1').update(dst).digest('base64');
}