function hmac(key, message, digestmod) {
  if (digestmod == null) {
    digestmod = hashlib.sha256;
  }

  this.finished = false;
  this.inner = digestmod();
  this.outer = digestmod();

  var i, pad = new Uint8Array(this.inner.block_size);

  if (key.length > this.inner.block_size) {
    var h = (new digestmod()).update(k),
        ah = E.toBufferArray(h.digest());

    for(i = 0; i < ah.length; i++) {
      pad[i] = ah[i].charCodeAt(0);
    }
  }
  else {
    for (i = 0; i < key.length; i++) {
      pad[i] = key[i].charCodeAt(0);
    }
  }
      
  for (i = 0; i < pad.length; i++) {
    pad[i] ^= 0x36;
  }
  this.inner.update(String.fromCharCode.apply(null, pad));

  for (i = 0; i < pad.length; i++) {
    pad[i] ^= 0x36 ^ 0x5c;
  }
  this.outer.update(String.fromCharCode.apply(null, pad));

  for (i = 0; i < pad.length; i++) {
    pad[i] = 0;
  }

  if(message) {
    this.inner.update(message);
  }
}
/*
Small module to add HMAC support. Depends on 'hashlib'.
*/
Small module to add HMAC support. Depends on 'hashlib'.
Small module to add HMAC support . Depends on ' hashlib ' .
function hmac(key, message, digestmod) {
  if (digestmod == null) {
    digestmod = hashlib.sha256;
  }
  this.finished = false;
  this.inner = digestmod();
  this.outer = digestmod();
  var i, pad = new Uint8Array(this.inner.block_size);
  if (key.length > this.inner.block_size) {
    var h = (new digestmod()).update(k),
        ah = E.toBufferArray(h.digest());
    for(i = 0; i < ah.length; i++) {
      pad[i] = ah[i].charCodeAt(0);
    }
  }
  else {
    for (i = 0; i < key.length; i++) {
      pad[i] = key[i].charCodeAt(0);
    }
  }
  for (i = 0; i < pad.length; i++) {
    pad[i] ^= 0x36;
  }
  this.inner.update(String.fromCharCode.apply(null, pad));
  for (i = 0; i < pad.length; i++) {
    pad[i] ^= 0x36 ^ 0x5c;
  }
  this.outer.update(String.fromCharCode.apply(null, pad));
  for (i = 0; i < pad.length; i++) {
    pad[i] = 0;
  }
  if(message) {
    this.inner.update(message);
  }
}
function hmac ( key , message , digestmod ) { if ( digestmod == null ) { digestmod = hashlib . sha256 ; } this . finished = false ; this . inner = digestmod ( ) ; this . outer = digestmod ( ) ; var i , pad = new Uint8Array ( this . inner . block_size ) ; if ( key . length > this . inner . block_size ) { var h = ( new digestmod ( ) ) . update ( k ) , ah = E . toBufferArray ( h . digest ( ) ) ; for ( i = 0 ; i < ah . length ; i ++ ) { pad [ i ] = ah [ i ] . charCodeAt ( 0 ) ; } } else { for ( i = 0 ; i < key . length ; i ++ ) { pad [ i ] = key [ i ] . charCodeAt ( 0 ) ; } } for ( i = 0 ; i < pad . length ; i ++ ) { pad [ i ] ^= 0x36 ; } this . inner . update ( String . fromCharCode . apply ( null , pad ) ) ; for ( i = 0 ; i < pad . length ; i ++ ) { pad [ i ] ^= 0x36 ^ 0x5c ; } this . outer . update ( String . fromCharCode . apply ( null , pad ) ) ; for ( i = 0 ; i < pad . length ; i ++ ) { pad [ i ] = 0 ; } if ( message ) { this . inner . update ( message ) ; } }
Small module to add HMAC support.
Small module to add HMAC support .