在javascript中将对话UTF-8编码为1251

问题描述

我需要在 JavaScript 中将 UTF-8 中的字符串转换为 1251 代码页中的字节数组.谷歌说没有任何用处.帮助:)

I need to convert string in UTF-8 to byte array in 1251 codepage in JavaScript. Google says nothing useful. Help :)

它是做什么用的.

我们有服务器和客户端.服务器具有使用 SHA512 和 1251 代码页的用户密码.客户端(Web 浏览器)必须使用 SHA512 散列密码(由用户以纯文本形式提供)并将其传输到服务器.问题是:浏览器使用 UTF-8 编码，当然 UFT-8 中的 SHA512 与 1251 中的 SHA512 不同.有什么想法吗?

We have server and client. Server has userpasswords hased with SHA512 and 1251 codepage. Client (web browser) has to hash passwords (provided by user in plain text) with SHA512 and transmit it to the server. The problem is: browser works in UTF-8 encoding, and of course SHA512 in UFT-8 is not the same as SHA512 in 1251. Any Ideas?

明白了！ :)

//utf8 to 1251 converter (1 byte format, RU/EN support only + any other symbols) by drgluck
function utf8_decode (aa) {
    var bb = '', c = 0;
    for (var i = 0; i < aa.length; i++) {
        c = aa.charCodeAt(i);
        if (c > 127) {
            if (c > 1024) {
                if (c == 1025) {
                    c = 1016;
                } else if (c == 1105) {
                    c = 1032;
                }
                bb += String.fromCharCode(c - 848);
            }
        } else {
            bb += aa.charAt(i);
        }
    }
    return bb;
} 

Paul Johnston 在 SHA512 实现中的使用 (http://pajhome.org.uk/crypt/md5/sha512.html)

Usage with SHA512 implementation by Paul Johnston (http://pajhome.org.uk/crypt/md5/sha512.html)

...
return rstr2hex(rstr_sha512(utf8_decode(input)));

推荐答案

这将 JavaScript 中的 Unicode 代码点编码为 windows-1251:

This encodes the Unicode codepoints in JavaScript to windows-1251:

var DMap = {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10, 11: 11, 12: 12, 13: 13, 14: 14, 15: 15, 16: 16, 17: 17, 18: 18, 19: 19, 20: 20, 21: 21, 22: 22, 23: 23, 24: 24, 25: 25, 26: 26, 27: 27, 28: 28, 29: 29, 30: 30, 31: 31, 32: 32, 33: 33, 34: 34, 35: 35, 36: 36, 37: 37, 38: 38, 39: 39, 40: 40, 41: 41, 42: 42, 43: 43, 44: 44, 45: 45, 46: 46, 47: 47, 48: 48, 49: 49, 50: 50, 51: 51, 52: 52, 53: 53, 54: 54, 55: 55, 56: 56, 57: 57, 58: 58, 59: 59, 60: 60, 61: 61, 62: 62, 63: 63, 64: 64, 65: 65, 66: 66, 67: 67, 68: 68, 69: 69, 70: 70, 71: 71, 72: 72, 73: 73, 74: 74, 75: 75, 76: 76, 77: 77, 78: 78, 79: 79, 80: 80, 81: 81, 82: 82, 83: 83, 84: 84, 85: 85, 86: 86, 87: 87, 88: 88, 89: 89, 90: 90, 91: 91, 92: 92, 93: 93, 94: 94, 95: 95, 96: 96, 97: 97, 98: 98, 99: 99, 100: 100, 101: 101, 102: 102, 103: 103, 104: 104, 105: 105, 106: 106, 107: 107, 108: 108, 109: 109, 110: 110, 111: 111, 112: 112, 113: 113, 114: 114, 115: 115, 116: 116, 117: 117, 118: 118, 119: 119, 120: 120, 121: 121, 122: 122, 123: 123, 124: 124, 125: 125, 126: 126, 127: 127, 1027: 129, 8225: 135, 1046: 198, 8222: 132, 1047: 199, 1168: 165, 1048: 200, 1113: 154, 1049: 201, 1045: 197, 1050: 202, 1028: 170, 160: 160, 1040: 192, 1051: 203, 164: 164, 166: 166, 167: 167, 169: 169, 171: 171, 172: 172, 173: 173, 174: 174, 1053: 205, 176: 176, 177: 177, 1114: 156, 181: 181, 182: 182, 183: 183, 8221: 148, 187: 187, 1029: 189, 1056: 208, 1057: 209, 1058: 210, 8364: 136, 1112: 188, 1115: 158, 1059: 211, 1060: 212, 1030: 178, 1061: 213, 1062: 214, 1063: 215, 1116: 157, 1064: 216, 1065: 217, 1031: 175, 1066: 218, 1067: 219, 1068: 220, 1069: 221, 1070: 222, 1032: 163, 8226: 149, 1071: 223, 1072: 224, 8482: 153, 1073: 225, 8240: 137, 1118: 162, 1074: 226, 1110: 179, 8230: 133, 1075: 227, 1033: 138, 1076: 228, 1077: 229, 8211: 150, 1078: 230, 1119: 159, 1079: 231, 1042: 194, 1080: 232, 1034: 140, 1025: 168, 1081: 233, 1082: 234, 8212: 151, 1083: 235, 1169: 180, 1084: 236, 1052: 204, 1085: 237, 1035: 142, 1086: 238, 1087: 239, 1088: 240, 1089: 241, 1090: 242, 1036: 141, 1041: 193, 1091: 243, 1092: 244, 8224: 134, 1093: 245, 8470: 185, 1094: 246, 1054: 206, 1095: 247, 1096: 248, 8249: 139, 1097: 249, 1098: 250, 1044: 196, 1099: 251, 1111: 191, 1055: 207, 1100: 252, 1038: 161, 8220: 147, 1101: 253, 8250: 155, 1102: 254, 8216: 145, 1103: 255, 1043: 195, 1105: 184, 1039: 143, 1026: 128, 1106: 144, 8218: 130, 1107: 131, 8217: 146, 1108: 186, 1109: 190}

function UnicodeToWin1251(s) {
    var L = []
    for (var i=0; i<s.length; i++) {
        var ord = s.charCodeAt(i)
        if (!(ord in DMap))
            throw "Character "+s.charAt(i)+" isn't supported by win1251!"
        L.push(String.fromCharCode(DMap[ord]))
    }
    return L.join('')
}

JavaScript 将每个字符存储为原始 Unicode 代码点，因此在使用 SHA512 获取哈希之前，上述内容应该可以工作.

JavaScript stores each character as raw Unicode codepoints, so the above should work before getting the hash using SHA512.

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