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author | Cash Costello <cash.costello@gmail.com> | 2010-10-24 21:08:27 +0000 |
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committer | Cash Costello <cash.costello@gmail.com> | 2010-10-24 21:08:27 +0000 |
commit | da1493b95a2f0b5000a487ae373c9318c58d0b2d (patch) | |
tree | a339b053ade9fb15a1717bdf248a59afc9b3d239 /vendors/uploadify/com/adobe/crypto/MD5.as | |
parent | 5161b1c8fdc8ff69005f864a89127fc18db6d4ed (diff) | |
download | elgg-da1493b95a2f0b5000a487ae373c9318c58d0b2d.tar.gz elgg-da1493b95a2f0b5000a487ae373c9318c58d0b2d.tar.bz2 |
partial implementation of flash uploader
Diffstat (limited to 'vendors/uploadify/com/adobe/crypto/MD5.as')
-rw-r--r-- | vendors/uploadify/com/adobe/crypto/MD5.as | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/vendors/uploadify/com/adobe/crypto/MD5.as b/vendors/uploadify/com/adobe/crypto/MD5.as new file mode 100644 index 000000000..da533cc44 --- /dev/null +++ b/vendors/uploadify/com/adobe/crypto/MD5.as @@ -0,0 +1,281 @@ +/* + 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; + } + + } +} |