UTF-8 conversation encoding to 1251 in javascript

Question

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

EDIT: for what.

We have a server and a client. The server has a user password with SHA512 and 1251 codes. The client (web browser) has hash passwords (provided by the user in plain text) with SHA512 and sends it to the server. The problem is that the browser works in UTF-8 encoding, and, of course, SHA512 in UFT-8 does not match with SHA512 in 1251. Any ideas?

EDIT2: got it! :)

//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; } 

Use using SHA512 by Paul Johnston ( http://pajhome.org.uk/crypt/md5/sha512.html )

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

Answer 1

This encodes Unicode code pages in JavaScript for 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 stores each character as raw Unicode code points, so the above should work before receiving a hash using SHA512.

Answer 2

When you access a string in javascript, it is not even UTF-8 encoded (browsers automatically decode it to the built-in javascript encoding or the one you specified when loading javascript or text or the default browser encoding), so you need to convert it first to UTF-8, and then convert to cp1251.

Take a look at this unicode encoding converter, I hope you get some ideas from this.

Answer 3

If you must guess the encoding, for Russian text you can use this