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-/*
- 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;
- /**
- * The MD5 Message-Digest Algorithm
- *
- * Implementation based on algorithm description at
- * http://www.faqs.org/rfcs/rfc1321.html
- */
- public class MD5 {
-
- public static var digest:ByteArray;
- /**
- * Performs the MD5 hash algorithm on a string.
- *
- * @param s The string to hash
- * @return A string containing the hash value of s
- * @langversion ActionScript 3.0
- * @playerversion Flash 8.5
- * @tiptext
- */
-
- public static function hash(s:String) :String{
- //Convert to byteArray and send through hashBinary function
- // so as to only have complex code in one location
- var ba:ByteArray = new ByteArray();
- ba.writeUTFBytes(s);
- return hashBinary(ba);
- }
-
- public static function hashBytes(s:ByteArray) :String{
- return hashBinary(s);
- }
-
- /**
- * Performs the MD5 hash algorithm on a ByteArray.
- *
- * @param s The string to hash
- * @return A string containing the hash value of s
- * @langversion ActionScript 3.0
- * @playerversion Flash 8.5
- * @tiptext
- */
- public static function hashBinary( s:ByteArray ):String {
- // initialize the md buffers
- var a:int = 1732584193;
- var b:int = -271733879;
- var c:int = -1732584194;
- var d:int = 271733878;
-
- // variables to store previous values
- var aa:int;
- var bb:int;
- var cc:int;
- var dd:int;
-
- // create the blocks from the string and
- // save the length as a local var to reduce
- // lookup in the loop below
- var x:Array = createBlocks( s );
- var len:int = x.length;
-
- // loop over all of the blocks
- for ( var i:int = 0; i < len; i += 16) {
- // save previous values
- aa = a;
- bb = b;
- cc = c;
- dd = d;
-
- // Round 1
- a = ff( a, b, c, d, x[int(i+ 0)], 7, -680876936 ); // 1
- d = ff( d, a, b, c, x[int(i+ 1)], 12, -389564586 ); // 2
- c = ff( c, d, a, b, x[int(i+ 2)], 17, 606105819 ); // 3
- b = ff( b, c, d, a, x[int(i+ 3)], 22, -1044525330 ); // 4
- a = ff( a, b, c, d, x[int(i+ 4)], 7, -176418897 ); // 5
- d = ff( d, a, b, c, x[int(i+ 5)], 12, 1200080426 ); // 6
- c = ff( c, d, a, b, x[int(i+ 6)], 17, -1473231341 ); // 7
- b = ff( b, c, d, a, x[int(i+ 7)], 22, -45705983 ); // 8
- a = ff( a, b, c, d, x[int(i+ 8)], 7, 1770035416 ); // 9
- d = ff( d, a, b, c, x[int(i+ 9)], 12, -1958414417 ); // 10
- c = ff( c, d, a, b, x[int(i+10)], 17, -42063 ); // 11
- b = ff( b, c, d, a, x[int(i+11)], 22, -1990404162 ); // 12
- a = ff( a, b, c, d, x[int(i+12)], 7, 1804603682 ); // 13
- d = ff( d, a, b, c, x[int(i+13)], 12, -40341101 ); // 14
- c = ff( c, d, a, b, x[int(i+14)], 17, -1502002290 ); // 15
- b = ff( b, c, d, a, x[int(i+15)], 22, 1236535329 ); // 16
-
- // Round 2
- a = gg( a, b, c, d, x[int(i+ 1)], 5, -165796510 ); // 17
- d = gg( d, a, b, c, x[int(i+ 6)], 9, -1069501632 ); // 18
- c = gg( c, d, a, b, x[int(i+11)], 14, 643717713 ); // 19
- b = gg( b, c, d, a, x[int(i+ 0)], 20, -373897302 ); // 20
- a = gg( a, b, c, d, x[int(i+ 5)], 5, -701558691 ); // 21
- d = gg( d, a, b, c, x[int(i+10)], 9, 38016083 ); // 22
- c = gg( c, d, a, b, x[int(i+15)], 14, -660478335 ); // 23
- b = gg( b, c, d, a, x[int(i+ 4)], 20, -405537848 ); // 24
- a = gg( a, b, c, d, x[int(i+ 9)], 5, 568446438 ); // 25
- d = gg( d, a, b, c, x[int(i+14)], 9, -1019803690 ); // 26
- c = gg( c, d, a, b, x[int(i+ 3)], 14, -187363961 ); // 27
- b = gg( b, c, d, a, x[int(i+ 8)], 20, 1163531501 ); // 28
- a = gg( a, b, c, d, x[int(i+13)], 5, -1444681467 ); // 29
- d = gg( d, a, b, c, x[int(i+ 2)], 9, -51403784 ); // 30
- c = gg( c, d, a, b, x[int(i+ 7)], 14, 1735328473 ); // 31
- b = gg( b, c, d, a, x[int(i+12)], 20, -1926607734 ); // 32
-
- // Round 3
- a = hh( a, b, c, d, x[int(i+ 5)], 4, -378558 ); // 33
- d = hh( d, a, b, c, x[int(i+ 8)], 11, -2022574463 ); // 34
- c = hh( c, d, a, b, x[int(i+11)], 16, 1839030562 ); // 35
- b = hh( b, c, d, a, x[int(i+14)], 23, -35309556 ); // 36
- a = hh( a, b, c, d, x[int(i+ 1)], 4, -1530992060 ); // 37
- d = hh( d, a, b, c, x[int(i+ 4)], 11, 1272893353 ); // 38
- c = hh( c, d, a, b, x[int(i+ 7)], 16, -155497632 ); // 39
- b = hh( b, c, d, a, x[int(i+10)], 23, -1094730640 ); // 40
- a = hh( a, b, c, d, x[int(i+13)], 4, 681279174 ); // 41
- d = hh( d, a, b, c, x[int(i+ 0)], 11, -358537222 ); // 42
- c = hh( c, d, a, b, x[int(i+ 3)], 16, -722521979 ); // 43
- b = hh( b, c, d, a, x[int(i+ 6)], 23, 76029189 ); // 44
- a = hh( a, b, c, d, x[int(i+ 9)], 4, -640364487 ); // 45
- d = hh( d, a, b, c, x[int(i+12)], 11, -421815835 ); // 46
- c = hh( c, d, a, b, x[int(i+15)], 16, 530742520 ); // 47
- b = hh( b, c, d, a, x[int(i+ 2)], 23, -995338651 ); // 48
-
- // Round 4
- a = ii( a, b, c, d, x[int(i+ 0)], 6, -198630844 ); // 49
- d = ii( d, a, b, c, x[int(i+ 7)], 10, 1126891415 ); // 50
- c = ii( c, d, a, b, x[int(i+14)], 15, -1416354905 ); // 51
- b = ii( b, c, d, a, x[int(i+ 5)], 21, -57434055 ); // 52
- a = ii( a, b, c, d, x[int(i+12)], 6, 1700485571 ); // 53
- d = ii( d, a, b, c, x[int(i+ 3)], 10, -1894986606 ); // 54
- c = ii( c, d, a, b, x[int(i+10)], 15, -1051523 ); // 55
- b = ii( b, c, d, a, x[int(i+ 1)], 21, -2054922799 ); // 56
- a = ii( a, b, c, d, x[int(i+ 8)], 6, 1873313359 ); // 57
- d = ii( d, a, b, c, x[int(i+15)], 10, -30611744 ); // 58
- c = ii( c, d, a, b, x[int(i+ 6)], 15, -1560198380 ); // 59
- b = ii( b, c, d, a, x[int(i+13)], 21, 1309151649 ); // 60
- a = ii( a, b, c, d, x[int(i+ 4)], 6, -145523070 ); // 61
- d = ii( d, a, b, c, x[int(i+11)], 10, -1120210379 ); // 62
- c = ii( c, d, a, b, x[int(i+ 2)], 15, 718787259 ); // 63
- b = ii( b, c, d, a, x[int(i+ 9)], 21, -343485551 ); // 64
-
- a += aa;
- b += bb;
- c += cc;
- d += dd;
- }
- digest = new ByteArray()
- digest.writeInt(a);
- digest.writeInt(b);
- digest.writeInt(c);
- digest.writeInt(d);
- digest.position = 0;
- // Finish up by concatening the buffers with their hex output
- return IntUtil.toHex( a ) + IntUtil.toHex( b ) + IntUtil.toHex( c ) + IntUtil.toHex( d );
- }
-
- /**
- * 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 );
- }
-
- /**
- * Converts a string to a sequence of 16-word blocks
- * that we'll do the processing on. Appends padding
- * and length in the process.
- *
- * @param s The string to split into blocks
- * @return An array containing the blocks that s was
- * split into.
- */
- private static function createBlocks( s:ByteArray ):Array {
- var blocks:Array = new Array();
- var len:int = s.length * 8;
- var mask:int = 0xFF; // ignore hi byte of characters > 0xFF
- for( var i:int = 0; i < len; i += 8 ) {
- blocks[ int(i >> 5) ] |= ( s[ i / 8 ] & mask ) << ( i % 32 );
- }
-
- // append padding and length
- blocks[ int(len >> 5) ] |= 0x80 << ( len % 32 );
- blocks[ int(( ( ( len + 64 ) >>> 9 ) << 4 ) + 14) ] = len;
- return blocks;
- }
-
- }
-}
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