if ( "undefined" == typeof( console ) ) {
	console = { "log": function(str){} };
}

var Gravatar = {
	"profile_stack": {},
	"profile_map": {},
	
	"load_js": function( src ) {
		if ( !this.loaded_scripts )
			this.loaded_scripts = [];
			
		if ( this.loaded_scripts[ src ] )
			return;
			
		var new_script = document.createElement( 'script' );
			new_script.src = src;
			new_script.type = 'text/javascript';
			document.getElementsByTagName( 'head' )[0].appendChild( new_script );
			
		this.loaded_scripts[ src ] = true;
	},
		
	"attach_profiles": function( container ) {
		console.log('Attaching event handlers to Gravatars');
		// Locate all Gravatar images and add profiles to them
		container = "undefined" == typeof( container ) ? "body" : container;
		jQuery( container + ' img[src*=gravatar.com/]' ).each( function( i ) {
			// Get hash from img src
			hash = /gravatar.com\/avatar\/([0-9a-f]{32})/.exec( jQuery( this ).attr( 'src' ) );
			if ( null != hash && "object" == typeof( hash ) && 2 == hash.length ) {
				hash = hash[1];
			} else {
				hash = /gravatar_id\=([0-9a-f]{32})/.exec( jQuery( this ).attr( 'src' ) );
				if ( null != hash && "object" == typeof( hash ) && 2 == hash.length ) {
					hash = hash[1];
				} else {
					return;
				}
			}

			console.log( 'Applied handler for: ' + hash );
			
			// Add unique ID to image so we can reference it more easily later
			uniq = 0;
			if ( jQuery( '#grav-' + hash + '-' + uniq ).length ) {
				while ( jQuery( '#grav-' + hash + '-' + uniq ).length ) {
					uniq++;
				}
			}
			jQuery( this ).attr( 'id', 'grav-' + hash + '-' + uniq );
			
			// Tweak CSS
			jQuery( this ).css( { 'cursor':'pointer' } );
			
			// Attach handler to get profile on hover
			jQuery( this ).hover( function() {
				// Get hash from img src
				hash = /gravatar.com\/avatar\/([0-9a-f]{32})/.exec( jQuery( this ).attr( 'src' ) );
				if ( null != hash && "object" == typeof( hash ) && 2 == hash.length ) {
					hash = hash[1];
				} else {
					hash = /gravatar_id\=([0-9a-f]{32})/.exec( jQuery( this ).attr( 'src' ) );
					if ( null !== hash && "object" == typeof( hash ) && 2 == hash.length ) {
						hash = hash[1];
					} else {
						return;
					}
				}

				Gravatar.show_card( hash, jQuery( this ).attr( 'id' ) );
			}, function(){});
		});
	},
	
	"fetch_profile_by_email": function( email ) {
		hash = this.md5( email );
		return this.fetch_profile_by_hash( hash );
	},
	
	"fetch_profile_by_hash": function( hash, uniq ) {
		// This is so that we know which specific Grav is waiting on us
		this.profile_map[ 'g' + hash ] = uniq;
		
		// If we already have it, no point getting it again, so just return it and notify any listeners
		if ( this.profile_stack[ 'g' + hash ] && 'object' == typeof( this.profile_stack[ 'g' + hash ] ) )
			return this.profile_stack[ 'g' + hash ];
			
		var url  = 'http://en.gravatar.com/profile/view/' + hash + '.json?callback=Gravatar.fetch_profile_callback';
		console.log( 'fetch_profile_by_hash: ' + url );
		this.profile_stack[ 'g' + hash ] = 'fetching';
		// Not using $.getJSON because it randomizes the function name, so the requests can't be cached
		this.load_js( url );		
	},
	
	"fetch_profile_callback": function( profile ) {
		if ( !profile || 'object' != typeof( profile ) )
			return;
		console.log( 'Received profile via callback:' );
		console.log( profile );
		this.profile_stack[ 'g' + profile.request_hash[0] ] = profile;
		GProfile.init( profile );
		this.notify( profile.request_hash[0] );
	},
	
	"get_profile": function( hash ) {
		if ( this.profile_stack[ 'g' + hash ] && 'object' == typeof( this.profile_stack[ 'g' + hash ] ) ) {
			GProfile.init( this.profile_stack[ 'g' + hash ] );
			return this.profile_stack[ 'g' + hash ];
		} else {
			this.fetch_profile_by_hash( hash );
		}
		return null;
	},
	
	"listen": function( key, callback ) {
		if ( !this.notify_stack )
			this.notify_stack = {};
		
		key = 'g' + key; // Force valid first char
		if ( !this.notify_stack[ key ] )
			this.notify_stack[ key ] = [];
		
		for ( a = 0; a < this.notify_stack[ key ].length; a++ ) {
			if ( callback == this.notify_stack[ key ][ a ] )
				return;
		}
		
		this.notify_stack[ key ][ this.notify_stack[ key ].length ] = callback;
		console.log( 'added listener: ' + key + ' => ' + callback );
		console.log( this.notify_stack );
	},
	
	"notify": function( key ) {
		console.log( 'trigger notification: ' + key );
		if ( !this.notify_stack )
			this.notify_stack = {};
		
		key = 'g' + key; // Force valid first char
		if ( !this.notify_stack[ key ] )
			this.notify_stack[ key ] = [];
		
		// Reverse it so that notifications are sent in the order they were queued
		console.log( 'notifying key: ' + key + ' (with ' + this.notify_stack[ key ].length + ' listeners)' );
		for ( a = 0; a < this.notify_stack[ key ].length; a++ ) {
			if ( false == this.notify_stack[ key ][ a ] || "undefined" == typeof( this.notify_stack[ key ][ a ] ) )
				continue;
			
			console.log( 'send notification to: ' + this.notify_stack[ key ][ a ] );
			Gravatar[ this.notify_stack[ key ][ a ] ]( key.substr( 1 ) );
			this.notify_stack[ key ][ a ] = false;
		}
	},
	
	"build_card": function( id, profile, grav_url ) {
		dom_id = ( this.profile_map[ 'g' + id ] ? this.profile_map[ 'g' + id ] : id + '-' + '0' );
		console.log(dom_id);
		id = 'grav-' + id;
		console.log( 'Build profile card for: ' + dom_id );
		console.log( profile );
		GProfile.init( profile );
		card = '<div class="gcard" id="profile-' + dom_id + '"> \
					<div class="gcard-inner"> \
						<div class="gcard-left"> \
							<div class="gcard-img"> \
								<a href="' + ( grav_url ? grav_url : GProfile.get( 'profile_url', 0 ) ) + '"> \
									<img src="' + GProfile.get( 'gravatar', 0 ) + '?s=80" width="80" height="80" /> \
								</a> \
							</div> \
							<div class="gcard-share">';
							
							services = GProfile.get( 'services' );
							console.log( 'Services to include in card:' );
							console.log( services );
							if ( "object" == typeof( services ) ) {
								services_out = 0;
								for ( var s in services ) {
									if ( !services[s][0] )
										continue;
									if ( services_out >= 8 )
										break;
									card += '<div class="gcard-share-link"> \
												<a href="' + services[s][0] + '" class="gcard-' + s + '"></a> \
											</div>';
									services_out++;
								}
							}
							
							description = GProfile.get( 'description', 0 );
							description = description.toString().substr( 0, 150 );
							if ( 150 == description.length )
								description += '&#8230;';
							
							card += '<br class="gcard-clear" /> \
							</div> \
						</div> \
						<div class="gcard-right"> \
							<div class="gcard-name">' + GProfile.get( 'full_name', 0 ) + '</div> \
							<div class="gcard-location">' + GProfile.get( 'location', 0 ) + '</div> \
							<div class="gcard-job">' + GProfile.get( 'job_title', 0 ) + '</div>';
							
							if ( description.length ) {
								card += '<div class="gcard-bio"> \
											<strong>Bio:</strong> ' + description + ' \
										</div>';
							}
							
							card += '<div class="gcard-view"> \
								<a href="' + GProfile.get( 'profile_url', 0 ) + '">View my complete profile</a> \
								<br class="gcard-clear" /> \
							</div> \
						</div> \
						<br class="gcard-clear" /> \
					</div> \
				</div>';
		console.log( 'Finished building card for ' + dom_id );
		jQuery( 'body' ).append( card );
		
		// Change CSS positioning based on where this Gravatar is in the page
		var winH = jQuery( window ).height();  
		var winW = jQuery( window ).width();
		var gPos = jQuery( '#' + dom_id ).offset();
		console.log( gPos );
		jQuery( '#profile-' + dom_id ).css( { 'top':( gPos.top - 10  ) + 'px', 'left':gPos.left + 'px' } );
	},
	
	"show_card": function( hash, id ) {
		this.add_card_css();
		console.log( 'show_card: hash: ' + hash + ', DOM ID: ' + id );

		// This is so that we know which specific Grav is waiting on us
		if ( "undefined" != typeof( id ) ) {
			this.profile_map[ 'g' + hash ] = id;
			console.log( 'updated profile_map to use ' + id + ' for g' + hash );
		}
		console.log( this.profile_map );

		// Close any existing cards
		jQuery( '.gcard' ).each( function() {
			Gravatar.hide_card( this.id );
		});
		
		// If we don't have this profile cached already, go get it
		if ( "undefined" == typeof( this.profile_stack[ 'g' + hash ] ) ) {
			this.listen( hash, 'show_card' );
			this.fetch_profile_by_hash( hash, id );
			return;
		} else if ( "undefined" == typeof( id ) ) {
			id = this.profile_map[ 'g' + hash ];
		}
		
		console.log( 'show_card: hash: ' + hash + ', DOM ID: ' + id );
		
		// Transform so we're referencing the DOM ID
		dom_id = this.profile_map[ 'g' + hash ];
		
		// No HTML? build it
		if ( !jQuery( '#profile-' + dom_id  ).length ) {
			// Let's grab the link off the image (if there is one) to use in the card
			grav_url = false;
			if ( jQuery( '#' + dom_id ).parent( 'a' ).length )
				grav_url = jQuery( '#' + dom_id ).parent( 'a' ).attr( 'href' );
			this.build_card( hash, this.profile_stack[ 'g' + hash ], grav_url );
		} else {
			jQuery( '#profile-' + dom_id  ).show();
		}
		
		jQuery( '#profile-' + dom_id ).hover( function(){}, function(){
			Gravatar.hide_card( this.id );
		} ).show();
	},

	"hide_card": function( id ) {
		jQuery( '#' + id ).fadeOut( 'fast' );
	},
		
	"md5": function( str ) {
		return hex_md5( str );
	},
	
	"add_card_css": function() {
		if ( jQuery( '#gravatar-card-css' ).length )
			return;
			
		new_css = "<style type='text/css' id='gravatar-card-css'> \
			.gcard { \
				position: absolute; \
				width: 380px; \
				border: 1px solid #999; \
				background: #fff; \
				border-radius: 5px; \
				-moz-border-radius: 5px; \
				-webkit-border-radius: 5px; \
				-moz-box-shadow: 1px 1px 1px #bbb; \
				-webkit-box-shadow: 1px 1px 1px #bbb; \
				box-shadow: 1px 1px 1px #bbb; \
				font-family: Arial; \
				color: #333; \
				display: none; \
				text-align: left; \
			} \
 \
			.gcard a { \
				color: #006699; \
				text-decoration: none; \
			} \
 \
			.gcard a:hover { \
				text-decoration: none; \
				border: 0; \
			} \
 \
			.gcard-inner { \
				padding: 10px; \
			} \
 \
			.gcard-clear { \
				margin: 0px; \
				padding: 0px; \
				clear: both; \
			} \
 \
			.gcard-left { \
				float: left; \
				width: 80px; \
			} \
 \
			.gcard-right { \
				float: right; \
				width: 266px; \
			} \
 \
			.gcard-share { \
				padding: 10px 0px 0px 0px; \
			} \
 \
			.gcard-img { \
				height: 80px; \
			} \
\
			.gcard-img img { \
				border: 0; \
				margin: 0; \
				padding: 0; \
			} \
 \
			.gcard-share-link { \
				width: 16px; \
				height: 16px; \
				padding: 0px 4px 4px 0px; \
				float: left; \
			} \
 \
			.gcard-share a { \
				width: 16px; \
				height: 16px; \
				display: block; \
				background-image: url( 'http://i.polldaddy.com/polls/grav-share-sprite.png' ); \
				background-repeat: no-repeat; \
			} \
 \
			.gcard-name { \
				font-size: 16px; \
				font-weight: bold; \
			} \
 \
			.gcard-location { \
				padding: 2px 0px; \
				font-size: 11px; \
			} \
 \
			.gcard-job { \
				padding: 0px 0px 4px 0px; \
				font-size: 10px; \
			} \
 \
			.gcard-bio { \
				font-size: 11px; \
				line-height: 16px; \
				font-weight: normal; \
			} \
 \
			.gcard-view { \
				padding: 10px 0px 5px 0px; \
			} \
 \
			.gcard-view a { \
				float: left; \
				display: block; \
				border: 1px solid #999; \
				line-height: 22px; \
				border-radius: 11px; \
				-moz-border-radius: 11px; \
				-webkit-border-radius: 11px; \
				font-size: 11px; \
				color: #333; \
				padding: 0px 20px; \
				background: #F2F2F2 url( 'http://s3.wordpress.com/wp-admin/images/white-grad.png' ) repeat-x left top; \
			} \
 \
			.gcard-view a:hover { \
				border: 1px solid #333; \
				text-decoration: none; \
			} \
 \
			.gcard-facebook { background-position: 0px -0px; } \
			.gcard-skype { background-position: 0px -16px; } \
			.gcard-dopplr { background-position: 0px -32px; } \
			.gcard-google { background-position: 0px -48px; } \
			.gcard-ilike { background-position: 0px -64px; } \
			.gcard-bebo { background-position: 0px -80px; } \
			.gcard-newsvine { background-position: 0px -96px; } \
			.gcard-email { background-position: 0px -112px; } \
			.gcard-openid { background-position: 0px -128px; } \
			.gcard-digg { background-position: 0px -144px; } \
			.gcard-yahoo { background-position: 0px -160px; } \
			.gcard-reddit { background-position: 0px -176px; } \
			.gcard-stumbleupon { background-position: 0px -192px; } \
			.gcard-youtube { background-position: 0px -208px; } \
			.gcard-friendfeed { background-position: 0px -224px; } \
			.gcard-delicious { background-position: 0px -240px; } \
			.gcard-picassa { background-position: 0px -256px; } \
			.gcard-netvibes { background-position: 0px -272px; } \
			.gcard-aim { background-position: 0px -288px; } \
			.gcard-wordpress { background-position: 0px -304px; } \
			.gcard-mobileme { background-position: 0px -320px; } \
			.gcard-blogger { background-position: 0px -336px; } \
			.gcard-myspace { background-position: 0px -352px; } \
			.gcard-linkedin { background-position: 0px -368px; } \
			.gcard-vimeo { background-position: 0px -384px; } \
			.gcard-flickr { background-position: 0px -400px; } \
			.gcard-buzz { background-position: 0px -416px; } \
			.gcard-technorati { background-position: 0px -432px; } \
			.gcard-tumblr { background-position: 0px -448px; } \
			.gcard-twitter { background-position: 0px -464px; } \
			.gcard-rss { background-position: 0px -480px; } \
			.gcard-lastfm { background-position: 0px -496px; } \
			.gcard-yelp { background-position: 0px -512px; } \
			.gcard-mixx { background-position: 0px -528px; } \
			.gcard-evernote { background-position: 0px -544px; } \
			.gcard-posterous { background-position: 0px -560px; } \
			.gcard-mobile { background-position: 0px -576px; } \
			.gcard-icq { background-position: 0px -592px; } \
			.gcard-yim { background-position: 0px -608px; } \
			.gcard-msn { background-position: 0px -624px; } \
			.gcard-gtalk { background-position: 0px -640px; } \
		</style>";
		jQuery( 'head' ).append( new_css );
		console.log( 'Added CSS for profile cards to DOM' );
	},
	
	"autofill": function( email, map ) {
		console.log('autofill');
		if ( !email.length || -1 == email.indexOf( '@' ) )
			return;
		
		this.autofill_map = map;
		hash = this.md5( email );
		console.log( this.profile_stack[ 'g' + hash ] );
		if ( "undefined" == typeof( this.profile_stack[ 'g' + hash ] ) ) {
			this.listen( hash, 'autofill_data' );
			this.fetch_profile_by_hash( hash );
		} else {
			console.log( 'stack: ' + this.profile_stack[ 'g' + hash ] );
			this.autofill_data( hash );
		}
	},
	
	"autofill_data": function( hash ) {
		console.log( this.autofill_map );
		console.log( this.profile_stack[ 'g' + hash ] );			
		GProfile.init( this.profile_stack[ 'g' + hash ] );
		for ( var m in this.autofill_map ) {
			console.log( m );
			console.log( this.autofill_map[ m ] );
			switch ( m ) {
				case 'link':
					link = GProfile.get( 'links', 0 );
					console.log( link );
					jQuery( '#' + this.autofill_map[ m ] ).val( link[ 'url' ] );
					break;
				case 'links':
					links = GProfile.get( m );
					links_str = '';
					console.log( links );
					for ( l = 0; l < links.length; l++ ) {
						links_str += links[ l ][ 'url' ] + "\n";
					}
					jQuery( '#' + this.autofill_map[ m ] ).val( links_str );
					break;
				default:
					jQuery( '#' + this.autofill_map[ m ] ).val( GProfile.get( m, 0 ) );
			}
		}
	}
};

/**
 * Provides an interface for acceseing profile data returned from Gravatar.com.
 * Use GProfile.init() to set up data, based on the JSON returned from Gravatar,
 * then GProfile.get() to access data more easily.
 */
var GProfile = {
	"data": {},
	
	"init": function( data ) {
		GProfile.data = data;
	},
	
	/**
	 * Returns a value from the profile data.
	 * @param string attr The name of the attribute you want
	 * @param int num (Optional) 0-based array index of the value from this attribute. Use 0 if you're not sure
	 * @return Mixed value of the attribute, or empty string.
	 */
	"get": function( attr, num ) {
		// Handle x.y references
		if ( -1 != attr.indexOf( '.' ) ) {
			parts = attr.split( /\./ );
			if ( GProfile.data[ parts[ 0 ] ][ parts[ 1 ] ] ) {
				val = GProfile.data[ parts[ 0 ] ][ parts[ 1 ] ]
				return val[ 0 ] ? val[ 0 ] : '';
			}
		}
		
		// Handle everything else
		if ( 'link' == attr ) {
			link = GProfile.get( 'links', 0 );
			return link[ 'url' ];
		} else {
			if ( "undefined" != typeof( num ) && GProfile.data[ attr ] && GProfile.data[ attr ][ num ] )
				return GProfile.data[ attr ][ num ];
			else if ( GProfile.data[ attr ] )
				return GProfile.data[ attr ];
		}
		return '';
	}
};

/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

/*
 * These functions implement the four basic operations the algorithm uses.
 */
function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Calculate the HMAC-MD5, of a key and some data
 */
function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left.
 */
function bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert a string to an array of little-endian words
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
 */
function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

/*
 * Convert an array of little-endian words to a string
 */
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

/*
 * Convert an array of little-endian words to a hex string.
 */
function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of little-endian words to a base-64 string
 */
function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
};
