C＃中UTF16LE（無BOM和0字節結束）的MD5

Question

我有以下問題; 我需要創建一個方法，它會生成一個字符串的MD5散列。該字符串例如是「1234567z-äbc」（帶變音符號的是）。

這一項的實際MD5哈希值是：935fe44e659beb5a3bb7a4564fba0513

MD5哈希，這是我需要的是（100％確定）：9e224a41eeefa284df7bb0f26c2913e2

我的文件說，它必須是無BOM一個utf16le應按轉換和0字節字符串的結尾。問題是轉換到這個。我在Javascript中有一個工作示例，但對於推送字節，我還是有點缺乏經驗。

/* 
* 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 */ 
var chrsz = 16; /* 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 ? "ABCDEF" : "abcdef"; 
    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 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz/"; 
    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; 
} 

那麼，這將如何在C＃中工作？

Answer 1

您可以使用UnicodeEncoding Class及其GetBytes Method將字符串轉換爲字節的UTF16-LE格式：

var bytes = Encoding.Unicode.GetBytes("1234567z-äbc"); 

然後你可以使用MD5Cng Class及其ComputeHash Method計算MD5哈希字節：

var hash = new MD5Cng().ComputeHash(bytes); 

最後，你可以哈希轉換爲字符串如下：

var result = hash.Aggregate(
    new StringBuilder(), (sb, x) => sb.Append(x.ToString("x2"))).ToString(); 

// result == "9e224a41eeefa284df7bb0f26c2913e2"