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From aha...@apache.org
Subject [2/5] git commit: [flex-utilities] [refs/heads/develop] - swap out com.adobe.crypto for org.apache.flex.crypto
Date Fri, 06 Jun 2014 16:58:00 GMT
swap out com.adobe.crypto for org.apache.flex.crypto


Project: http://git-wip-us.apache.org/repos/asf/flex-utilities/repo
Commit: http://git-wip-us.apache.org/repos/asf/flex-utilities/commit/02f7c694
Tree: http://git-wip-us.apache.org/repos/asf/flex-utilities/tree/02f7c694
Diff: http://git-wip-us.apache.org/repos/asf/flex-utilities/diff/02f7c694

Branch: refs/heads/develop
Commit: 02f7c6949c2aa1439c9d7ef5c43034c34bde9d17
Parents: 65ba9b7
Author: Alex Harui <aharui@apache.org>
Authored: Thu Jun 5 16:08:30 2014 -0700
Committer: Alex Harui <aharui@apache.org>
Committed: Thu Jun 5 16:08:30 2014 -0700

----------------------------------------------------------------------
 installer/src/com/adobe/crypto/MD5Stream.as     | 402 -------------------
 installer/src/com/adobe/utils/IntUtil.as        |  99 -----
 .../flex/packageflexsdk/util/MD5CompareUtil.as  |  14 +-
 3 files changed, 6 insertions(+), 509 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/flex-utilities/blob/02f7c694/installer/src/com/adobe/crypto/MD5Stream.as
----------------------------------------------------------------------
diff --git a/installer/src/com/adobe/crypto/MD5Stream.as b/installer/src/com/adobe/crypto/MD5Stream.as
deleted file mode 100644
index 7abeef0..0000000
--- a/installer/src/com/adobe/crypto/MD5Stream.as
+++ /dev/null
@@ -1,402 +0,0 @@
-/*
-  Copyright (c) 2008, Adobe Systems Incorporated
-  All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without 
-  modification, are permitted provided that the following conditions are
-  met:
-
-  * Redistributions of source code must retain the above copyright notice, 
-    this list of conditions and the following disclaimer.
-  
-  * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the 
-    documentation and/or other materials provided with the distribution.
-  
-  * Neither the name of Adobe Systems Incorporated nor the names of its 
-    contributors may be used to endorse or promote products derived from 
-    this software without specific prior written permission.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
-  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package com.adobe.crypto
-{
-    import com.adobe.utils.IntUtil;   
-    import flash.utils.ByteArray;
-
-    /**
-     * Perform MD5 hash of an input stream in chunks. This class is
-     * based on com.adobe.crypto.MD5 and can process data in
-     * chunks. Both block creation and hash computation are done
-     * together for whatever input is available so that the memory
-     * overhead at a time is always fixed. Memory usage is governed by
-     * two parameters: one is the amount of data passed in to update()
-     * and the other is memoryBlockSize. The latter comes into play
-     * only when the memory window exceeds the pre allocated memory
-     * window of flash player. Usage: create an instance, call
-     * update(data) repeatedly for all chunks and finally complete()
-     * which will return the md5 hash.
-     */      
-    public class MD5Stream
-    {
-        private static var mask:int = 0xFF;
-
-        private var arr:Array = [];
-
-        /* running count of length */
-        private var arrLen:int;
-        
-        // initialize the md buffers
-        private var a:int = 1732584193;
-        private var b:int = -271733879;
-        private var c:int = -1732584194;
-        private var d:int = 271733878;
-        
-        // variables to store previous values
-        private var aa:int;
-        private var bb:int;
-        private var cc:int;
-        private var dd:int;
-
-        /* index for data read */
-        private var arrIndexLen:int = 0;
-        /* index for hash computation */
-        private var arrProcessIndex:int = 0;
-        /* index for removing stale arr values */
-        private var cleanIndex:int = 0;
-        
-        /** 
-         * Change this value from the default (16384) in the range of
-         * MBs to actually affect GC as GC allocates in pools of
-         * memory */
-        public var memoryBlockSize:int = 16384;
-        
-        
-        public function MD5Stream()
-        {
-            
-        }
-               
-        
-        /**
-         * Pass in chunks of the input data with update(), call
-         * complete() with an optional chunk which will return the
-         * final hash. Equivalent to the way
-         * java.security.MessageDigest works.
-         *
-         * @param input The optional bytearray chunk which is the final part of the input
-         * @return A string containing the hash value
-         * @langversion ActionScript 3.0
-         * @playerversion Flash 8.5
-         * @tiptext
-         */
-        public function complete(input:ByteArray=null):String
-        {
-            if ( arr.length == 0 )
-            {
-                if ( input == null )
-                {
-                    throw new Error("null input to complete without prior call to update.
At least an empty bytearray must be passed.");
-                }		 		
-            }
-            
-            if ( input != null )
-            {
-                readIntoArray(input);
-            }
-
-            //pad, append length
-            padArray(arrLen);
-
-            hashRemainingChunks(false);
-            
-            var res:String = IntUtil.toHex( a ) + IntUtil.toHex( b ) + 
-            				 IntUtil.toHex( c ) + IntUtil.toHex( d );
-            resetFields();
-            
-            return res;
-        }
-
-        /**
-         * Pass in chunks of the input data with update(), call
-         * complete() with an optional chunk which will return the
-         * final hash. Equivalent to the way
-         * java.security.MessageDigest works.
-         *
-         * @param input The bytearray chunk to perform the hash on
-         * @langversion ActionScript 3.0
-         * @playerversion Flash 8.5
-         * @tiptext
-         */        
-        public function update(input:ByteArray):void
-        {
-            readIntoArray(input);
-            hashRemainingChunks();
-        }
-
-        /**
-         * Re-initialize this instance for use to perform hashing on
-         * another input stream. This is called automatically by
-         * complete().
-         *
-         * @langversion ActionScript 3.0
-         * @playerversion Flash 8.5
-         * @tiptext
-         */               
-        public function resetFields():void
-        {
-            //truncate array
-            arr.length = 0;
-            arrLen = 0;
-            
-            // initialize the md buffers
-            a = 1732584193;
-            b = -271733879;
-            c = -1732584194;
-            d = 271733878;
-            
-            // variables to store previous values
-            aa = 0;
-            bb = 0;
-            cc = 0;
-            dd = 0;
-            
-            arrIndexLen = 0;            
-            arrProcessIndex = 0;
-            cleanIndex = 0;
-        }
-        
-        /** read into arr and free up used blocks of arr */
-        private function readIntoArray(input:ByteArray):void
-        {
-            var closestChunkLen:int = input.length * 8;
-            arrLen += closestChunkLen;
-            
-            /* clean up memory. if there are entries in the array that
-             * are already processed and the amount is greater than
-             * memoryBlockSize, create a new array, copy the last
-             * block into it and let the old one get picked up by
-             * GC. */
-            if ( arrProcessIndex - cleanIndex > memoryBlockSize )
-            {
-                var newarr:Array= new Array();
-                
-                /* AS Arrays in sparse arrays. arr[2002] can exist 
-                 * without values for arr[0] - arr[2001] */
-                for ( var j:int = arrProcessIndex; j < arr.length; j++ )
-                {						
-                    newarr[j] = arr[j];
-                }
-                
-                cleanIndex = arrProcessIndex;
-                arr = null;
-                arr = newarr;
-            }
-            
-            for ( var k:int = 0; k < closestChunkLen; k+=8 )
-            {
-                //discard high bytes (convert to uint)
-                arr[ int(arrIndexLen >> 5) ] |= ( input[ k / 8 ] & mask ) <<
( arrIndexLen % 32 );
-                arrIndexLen += 8;
-            }
-            
-            
-        }
-        
-        private function hashRemainingChunks(bUpdate:Boolean=true):void
-        {
-            var len:int = arr.length;
-
-            /* leave a 16 word block untouched if we are called from
-             * update. This is because, padArray() can modify the last
-             * block and this modification has to happen before we
-             * compute the hash.  */
-            if ( bUpdate )
-            {
-                len -= 16;
-            }
-
-            /* don't do anything if don't have a 16 word block. */
-            if ( arrProcessIndex >= len || len - arrProcessIndex < 15 )
-            {
-                return;
-            }
-
-            
-            for ( var i:int = arrProcessIndex; i < len ; i += 16, arrProcessIndex += 16)

-            {            	
-                // save previous values
-                aa = a;
-                bb = b;
-                cc = c;
-                dd = d;                         
-                
-                // Round 1
-                a = ff( a, b, c, d, arr[int(i+ 0)],  7, -680876936 );     // 1
-                d = ff( d, a, b, c, arr[int(i+ 1)], 12, -389564586 );     // 2
-                c = ff( c, d, a, b, arr[int(i+ 2)], 17, 606105819 );      // 3
-                b = ff( b, c, d, a, arr[int(i+ 3)], 22, -1044525330 );    // 4
-                a = ff( a, b, c, d, arr[int(i+ 4)],  7, -176418897 );     // 5
-                d = ff( d, a, b, c, arr[int(i+ 5)], 12, 1200080426 );     // 6
-                c = ff( c, d, a, b, arr[int(i+ 6)], 17, -1473231341 );    // 7
-                b = ff( b, c, d, a, arr[int(i+ 7)], 22, -45705983 );      // 8
-                a = ff( a, b, c, d, arr[int(i+ 8)],  7, 1770035416 );     // 9
-                d = ff( d, a, b, c, arr[int(i+ 9)], 12, -1958414417 );    // 10
-                c = ff( c, d, a, b, arr[int(i+10)], 17, -42063 );                 // 11
-                b = ff( b, c, d, a, arr[int(i+11)], 22, -1990404162 );    // 12
-                a = ff( a, b, c, d, arr[int(i+12)],  7, 1804603682 );     // 13
-                d = ff( d, a, b, c, arr[int(i+13)], 12, -40341101 );      // 14
-                c = ff( c, d, a, b, arr[int(i+14)], 17, -1502002290 );    // 15
-                b = ff( b, c, d, a, arr[int(i+15)], 22, 1236535329 );     // 16
-                
-                // Round 2
-                a = gg( a, b, c, d, arr[int(i+ 1)],  5, -165796510 );     // 17
-                d = gg( d, a, b, c, arr[int(i+ 6)],  9, -1069501632 );    // 18
-                c = gg( c, d, a, b, arr[int(i+11)], 14, 643717713 );      // 19
-                b = gg( b, c, d, a, arr[int(i+ 0)], 20, -373897302 );     // 20
-                a = gg( a, b, c, d, arr[int(i+ 5)],  5, -701558691 );     // 21
-                d = gg( d, a, b, c, arr[int(i+10)],  9, 38016083 );       // 22
-                c = gg( c, d, a, b, arr[int(i+15)], 14, -660478335 );     // 23
-                b = gg( b, c, d, a, arr[int(i+ 4)], 20, -405537848 );     // 24
-                a = gg( a, b, c, d, arr[int(i+ 9)],  5, 568446438 );      // 25
-                d = gg( d, a, b, c, arr[int(i+14)],  9, -1019803690 );    // 26
-                c = gg( c, d, a, b, arr[int(i+ 3)], 14, -187363961 );     // 27
-                b = gg( b, c, d, a, arr[int(i+ 8)], 20, 1163531501 );     // 28
-                a = gg( a, b, c, d, arr[int(i+13)],  5, -1444681467 );    // 29
-                d = gg( d, a, b, c, arr[int(i+ 2)],  9, -51403784 );      // 30
-                c = gg( c, d, a, b, arr[int(i+ 7)], 14, 1735328473 );     // 31
-                b = gg( b, c, d, a, arr[int(i+12)], 20, -1926607734 );    // 32
-                
-                // Round 3
-                a = hh( a, b, c, d, arr[int(i+ 5)],  4, -378558 );        // 33
-                d = hh( d, a, b, c, arr[int(i+ 8)], 11, -2022574463 );    // 34
-                c = hh( c, d, a, b, arr[int(i+11)], 16, 1839030562 );     // 35
-                b = hh( b, c, d, a, arr[int(i+14)], 23, -35309556 );      // 36
-                a = hh( a, b, c, d, arr[int(i+ 1)],  4, -1530992060 );    // 37
-                d = hh( d, a, b, c, arr[int(i+ 4)], 11, 1272893353 );     // 38
-                c = hh( c, d, a, b, arr[int(i+ 7)], 16, -155497632 );     // 39
-                b = hh( b, c, d, a, arr[int(i+10)], 23, -1094730640 );    // 40
-                a = hh( a, b, c, d, arr[int(i+13)],  4, 681279174 );      // 41
-                d = hh( d, a, b, c, arr[int(i+ 0)], 11, -358537222 );     // 42
-                c = hh( c, d, a, b, arr[int(i+ 3)], 16, -722521979 );     // 43
-                b = hh( b, c, d, a, arr[int(i+ 6)], 23, 76029189 );       // 44
-                a = hh( a, b, c, d, arr[int(i+ 9)],  4, -640364487 );     // 45
-                d = hh( d, a, b, c, arr[int(i+12)], 11, -421815835 );     // 46
-                c = hh( c, d, a, b, arr[int(i+15)], 16, 530742520 );      // 47
-                b = hh( b, c, d, a, arr[int(i+ 2)], 23, -995338651 );     // 48
-                
-                // Round 4
-                a = ii( a, b, c, d, arr[int(i+ 0)],  6, -198630844 );     // 49
-                d = ii( d, a, b, c, arr[int(i+ 7)], 10, 1126891415 );     // 50
-                c = ii( c, d, a, b, arr[int(i+14)], 15, -1416354905 );    // 51
-                b = ii( b, c, d, a, arr[int(i+ 5)], 21, -57434055 );      // 52
-                a = ii( a, b, c, d, arr[int(i+12)],  6, 1700485571 );     // 53
-                d = ii( d, a, b, c, arr[int(i+ 3)], 10, -1894986606 );    // 54
-                c = ii( c, d, a, b, arr[int(i+10)], 15, -1051523 );       // 55
-                b = ii( b, c, d, a, arr[int(i+ 1)], 21, -2054922799 );    // 56
-                a = ii( a, b, c, d, arr[int(i+ 8)],  6, 1873313359 );     // 57
-                d = ii( d, a, b, c, arr[int(i+15)], 10, -30611744 );      // 58
-                c = ii( c, d, a, b, arr[int(i+ 6)], 15, -1560198380 );    // 59
-                b = ii( b, c, d, a, arr[int(i+13)], 21, 1309151649 );     // 60
-                a = ii( a, b, c, d, arr[int(i+ 4)],  6, -145523070 );     // 61
-                d = ii( d, a, b, c, arr[int(i+11)], 10, -1120210379 );    // 62
-                c = ii( c, d, a, b, arr[int(i+ 2)], 15, 718787259 );      // 63
-                b = ii( b, c, d, a, arr[int(i+ 9)], 21, -343485551 );     // 64
-                
-                a += aa;
-                b += bb;
-                c += cc;
-                d += dd;
-                
-            }
-            
-        }
-        
-        private function padArray(len:int):void
-        {	 		
-            arr[ int(len >> 5) ] |= 0x80 << ( len % 32 );
-            arr[ int(( ( ( len + 64 ) >>> 9 ) << 4 ) + 14) ] = len;
-            arrLen = arr.length;
-        }  
-        
-        /* Code below same as com.adobe.crypto.MD5 */ 
-        
-        /**
-         * Auxiliary function f as defined in RFC
-         */
-        private static function f( x:int, y:int, z:int ):int {
-            return ( x & y ) | ( (~x) & z );
-        }
-        
-        /**
-         * Auxiliary function g as defined in RFC
-         */
-        private static function g( x:int, y:int, z:int ):int {
-            return ( x & z ) | ( y & (~z) );
-        }
-        
-        /**
-         * Auxiliary function h as defined in RFC
-         */
-        private static function h( x:int, y:int, z:int ):int {
-            return x ^ y ^ z;
-        }
-        
-        /**
-         * Auxiliary function i as defined in RFC
-         */
-        private static function i( x:int, y:int, z:int ):int {
-            return y ^ ( x | (~z) );
-        }
-        
-        /**
-         * A generic transformation function.  The logic of ff, gg, hh, and
-         * ii are all the same, minus the function used, so pull that logic
-         * out and simplify the method bodies for the transoformation functions.
-         */
-        private static function transform( func:Function, a:int, b:int, c:int, d:int, x:int,
s:int, t:int):int {
-            var tmp:int = a + int( func( b, c, d ) ) + x + t;
-            return IntUtil.rol( tmp, s ) +  b;
-        }
-        
-        /**
-         * ff transformation function
-         */
-        private static function ff ( a:int, b:int, c:int, d:int, x:int, s:int, t:int ):int
{
-            return transform( f, a, b, c, d, x, s, t );
-        }
-        
-        /**
-         * gg transformation function
-         */
-        private static function gg ( a:int, b:int, c:int, d:int, x:int, s:int, t:int ):int
{
-            return transform( g, a, b, c, d, x, s, t );
-        }
-        
-        /**
-         * hh transformation function
-         */
-        private static function hh ( a:int, b:int, c:int, d:int, x:int, s:int, t:int ):int
{
-            return transform( h, a, b, c, d, x, s, t );
-        }
-        
-        /**
-         * ii transformation function
-         */
-        private static function ii ( a:int, b:int, c:int, d:int, x:int, s:int, t:int ):int
{
-            return transform( i, a, b, c, d, x, s, t );
-        }
-        
-    }
-}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/flex-utilities/blob/02f7c694/installer/src/com/adobe/utils/IntUtil.as
----------------------------------------------------------------------
diff --git a/installer/src/com/adobe/utils/IntUtil.as b/installer/src/com/adobe/utils/IntUtil.as
deleted file mode 100644
index c7bae7c..0000000
--- a/installer/src/com/adobe/utils/IntUtil.as
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
-  Copyright (c) 2008, Adobe Systems Incorporated
-  All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without 
-  modification, are permitted provided that the following conditions are
-  met:
-
-  * Redistributions of source code must retain the above copyright notice, 
-    this list of conditions and the following disclaimer.
-  
-  * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the 
-    documentation and/or other materials provided with the distribution.
-  
-  * Neither the name of Adobe Systems Incorporated nor the names of its 
-    contributors may be used to endorse or promote products derived from 
-    this software without specific prior written permission.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
-  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-package com.adobe.utils {
-	
-	import flash.utils.Endian;
-	
-	/**
-	 * Contains reusable methods for operations pertaining 
-	 * to int values.
-	 */
-	public class IntUtil {
-		
-		/**
-		 * Rotates x left n bits
-		 *
-		 * @langversion ActionScript 3.0
-		 * @playerversion Flash 9.0
-		 * @tiptext
-		 */
-		public static function rol ( x:int, n:int ):int {
-			return ( x << n ) | ( x >>> ( 32 - n ) );
-		}
-		
-		/**
-		 * Rotates x right n bits
-		 *
-		 * @langversion ActionScript 3.0
-		 * @playerversion Flash 9.0
-		 * @tiptext
-		 */
-		public static function ror ( x:int, n:int ):uint {
-			var nn:int = 32 - n;
-			return ( x << nn ) | ( x >>> ( 32 - nn ) );
-		}
-		
-		/** String for quick lookup of a hex character based on index */
-		private static var hexChars:String = "0123456789abcdef";
-		
-		/**
-		 * Outputs the hex value of a int, allowing the developer to specify
-		 * the endinaness in the process.  Hex output is lowercase.
-		 *
-		 * @param n The int value to output as hex
-		 * @param bigEndian Flag to output the int as big or little endian
-		 * @return A string of length 8 corresponding to the 
-		 *		hex representation of n ( minus the leading "0x" )
-		 * @langversion ActionScript 3.0
-		 * @playerversion Flash 9.0
-		 * @tiptext
-		 */
-		public static function toHex( n:int, bigEndian:Boolean = false ):String {
-			var s:String = "";
-			
-			if ( bigEndian ) {
-				for ( var i:int = 0; i < 4; i++ ) {
-					s += hexChars.charAt( ( n >> ( ( 3 - i ) * 8 + 4 ) ) & 0xF ) 
-						+ hexChars.charAt( ( n >> ( ( 3 - i ) * 8 ) ) & 0xF );
-				}
-			} else {
-				for ( var x:int = 0; x < 4; x++ ) {
-					s += hexChars.charAt( ( n >> ( x * 8 + 4 ) ) & 0xF )
-						+ hexChars.charAt( ( n >> ( x * 8 ) ) & 0xF );
-				}
-			}
-			
-			return s;
-		}
-	}
-		
-}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/flex-utilities/blob/02f7c694/installer/src/org/apache/flex/packageflexsdk/util/MD5CompareUtil.as
----------------------------------------------------------------------
diff --git a/installer/src/org/apache/flex/packageflexsdk/util/MD5CompareUtil.as b/installer/src/org/apache/flex/packageflexsdk/util/MD5CompareUtil.as
index 54dbcd4..c422c9e 100644
--- a/installer/src/org/apache/flex/packageflexsdk/util/MD5CompareUtil.as
+++ b/installer/src/org/apache/flex/packageflexsdk/util/MD5CompareUtil.as
@@ -20,8 +20,6 @@
 package org.apache.flex.packageflexsdk.util
 {
 
-import com.adobe.crypto.MD5Stream;
-
 import flash.events.Event;
 import flash.events.EventDispatcher;
 import flash.events.IOErrorEvent;
@@ -35,6 +33,7 @@ import flash.net.URLLoaderDataFormat;
 import flash.net.URLRequest;
 import flash.utils.ByteArray;
 
+import org.apache.flex.crypto.MD5Stream;
 import org.apache.flex.utilities.common.Constants;
 
 [Event(name="progress", type="flash.events.ProgressEvent")]
@@ -52,6 +51,8 @@ public class MD5CompareUtil extends EventDispatcher
 	
 	public static const MD5_POSTFIX:String = ".md5";
 	
+    public static const CHUNK_SIZE:int = 2 * 1024 * 1024;
+    
 	//--------------------------------------------------------------------------
 	//
 	//    Class properties
@@ -152,7 +153,7 @@ public class MD5CompareUtil extends EventDispatcher
 		_md5Stream = new MD5Stream();
 		
 		_fileStream = new FileStream();
-		_fileStream.readAhead = 16384;
+		_fileStream.readAhead = CHUNK_SIZE;
 		_fileStream.addEventListener(Event.COMPLETE, fileStreamOpenHandler);
 		_fileStream.addEventListener(ProgressEvent.PROGRESS, fileStreamOpenHandler);
 		_fileStream.addEventListener(OutputProgressEvent.OUTPUT_PROGRESS, fileStreamOpenHandler);
@@ -165,12 +166,9 @@ public class MD5CompareUtil extends EventDispatcher
 	
 	private function fileStreamOpenHandler(event:Event):void
 	{
-		var data:ByteArray = new ByteArray();
-		_fileStream.readBytes(data, 0, _fileStream.bytesAvailable);
-		
 		if (event is ProgressEvent)
 		{
-			_md5Stream.update(data);
+			_md5Stream.update(_fileStream, Math.floor(_fileStream.bytesAvailable / 64) * 64);
 			
 			dispatchEvent(event.clone());
 		}
@@ -178,8 +176,8 @@ public class MD5CompareUtil extends EventDispatcher
 		{
 			if (event.type == Event.COMPLETE)
 			{
+				_fileIsVerified = (_md5Stream.complete(_fileStream, _file.size) == _remoteMD5Value);
                 _fileStream.close();
-				_fileIsVerified = (_md5Stream.complete(data) == _remoteMD5Value);
 				
 				removeEventListeners();
 				_callback();


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