var sigKeyAlg = {
  name: "RSASSA-PKCS1-v1_5",
  params: {
    modulusLength: 512,
    publicExponent: new Uint8Array([0x01, 0x00, 0x01])
  }
};
var sigAlg = {
  name: "RSASSA-PKCS1-v1_5",
  params: { hash: "SHA-1" }
};
function signature(text) {
  var arr = str2bin(text);
  polycrypt.generateKey(sigKeyAlg).oncomplete = function(e) {
    var key = e.target.result;
    polycrypt.sign(sigAlg, key.privateKey, arr).oncomplete = function(e) {
      var sign= e.target.result;
      polycrypt.verify(sigAlg, key.publicKey, sign, arr).oncomplete = function(e) {
        console.log("verifyed?: "+e.target.result);
      };
    };
  };
};