JavaScript md5

ゞ浴缸里的玫瑰 2021-09-25 06:58 155阅读 0赞

**分享一个后端学习网站：[https://how2j.cn/k/diytomcat/diytomcat-intro/2187.html?p=17361][https_how2j.cn_k_diytomcat_diytomcat-intro_2187.html_p_17361]**

function md5(string){
                    function md5_RotateLeft(lValue, iShiftBits) {
                            return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
                    }
                    function md5_AddUnsigned(lX,lY){
                            var lX4,lY4,lX8,lY8,lResult;
                            lX8 = (lX & 0x80000000);
                            lY8 = (lY & 0x80000000);
                            lX4 = (lX & 0x40000000);
                            lY4 = (lY & 0x40000000);
                            lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);
                            if (lX4 & lY4) {
                                    return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
                            }
                            if (lX4 | lY4) {
                                    if (lResult & 0x40000000) {
                                            return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
                                    } else {
                                            return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
                                    }
                            } else {
                                    return (lResult ^ lX8 ^ lY8);
                            }
                    }         
                    function md5_F(x,y,z){
                            return (x & y) | ((~x) & z);
                    }
                    function md5_G(x,y,z){
                            return (x & z) | (y & (~z));
                    }
                    function md5_H(x,y,z){
                            return (x ^ y ^ z);
                    }
                    function md5_I(x,y,z){
                            return (y ^ (x | (~z)));
                    }
                    function md5_FF(a,b,c,d,x,s,ac){
                            a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_F(b, c, d), x), ac));
                            return md5_AddUnsigned(md5_RotateLeft(a, s), b);
                    };
                    function md5_GG(a,b,c,d,x,s,ac){
                            a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_G(b, c, d), x), ac));
                            return md5_AddUnsigned(md5_RotateLeft(a, s), b);
                    };
                    function md5_HH(a,b,c,d,x,s,ac){
                            a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_H(b, c, d), x), ac));
                            return md5_AddUnsigned(md5_RotateLeft(a, s), b);
                    };
                    function md5_II(a,b,c,d,x,s,ac){
                            a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_I(b, c, d), x), ac));
                            return md5_AddUnsigned(md5_RotateLeft(a, s), b);
                    };
                    function md5_ConvertToWordArray(string) {
                            var lWordCount;
                            var lMessageLength = string.length;
                            var lNumberOfWords_temp1=lMessageLength + 8;
                            var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
                            var lNumberOfWords = (lNumberOfWords_temp2+1)*16;
                            var lWordArray=Array(lNumberOfWords-1);
                            var lBytePosition = 0;
                            var lByteCount = 0;
                            while ( lByteCount < lMessageLength ) {
                                    lWordCount = (lByteCount-(lByteCount % 4))/4;
                                    lBytePosition = (lByteCount % 4)*8;
                                    lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount)<<lBytePosition));
                                    lByteCount++;
                            }
                            lWordCount = (lByteCount-(lByteCount % 4))/4;
                            lBytePosition = (lByteCount % 4)*8;
                            lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
                            lWordArray[lNumberOfWords-2] = lMessageLength<<3;
                            lWordArray[lNumberOfWords-1] = lMessageLength>>>29;
                            return lWordArray;
                    };
                    function md5_WordToHex(lValue){
                            var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
                            for(lCount = 0;lCount<=3;lCount++){
                                    lByte = (lValue>>>(lCount*8)) & 255;
                                    WordToHexValue_temp = "0" + lByte.toString(16);
                                    WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
                            }
                            return WordToHexValue;
                    };
                    function md5_Utf8Encode(string){
                            string = string.replace(/\r\n/g,"\n");
                            var utftext = "";
                            for (var n = 0; n < string.length; n++) {
                                    var c = string.charCodeAt(n);
                                    if (c < 128) {
                                            utftext += String.fromCharCode(c);
                                    }else if((c > 127) && (c < 2048)) {
                                            utftext += String.fromCharCode((c >> 6) | 192);
                                            utftext += String.fromCharCode((c & 63) | 128);
                                    } else {
                                            utftext += String.fromCharCode((c >> 12) | 224);
                                            utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                                            utftext += String.fromCharCode((c & 63) | 128);
                                    }
                            }
                            return utftext;
                    };
                    var x=Array();
                    var k,AA,BB,CC,DD,a,b,c,d;
                    var S11=7, S12=12, S13=17, S14=22;
                    var S21=5, S22=9 , S23=14, S24=20;
                    var S31=4, S32=11, S33=16, S34=23;
                    var S41=6, S42=10, S43=15, S44=21;
                    string = md5_Utf8Encode(string);
                    x = md5_ConvertToWordArray(string);
                    a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
                    for (k=0;k<x.length;k+=16) {
                            AA=a; BB=b; CC=c; DD=d;
                            a=md5_FF(a,b,c,d,x[k+0], S11,0xD76AA478);
                            d=md5_FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
                            c=md5_FF(c,d,a,b,x[k+2], S13,0x242070DB);
                            b=md5_FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
                            a=md5_FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
                            d=md5_FF(d,a,b,c,x[k+5], S12,0x4787C62A);
                            c=md5_FF(c,d,a,b,x[k+6], S13,0xA8304613);
                            b=md5_FF(b,c,d,a,x[k+7], S14,0xFD469501);
                            a=md5_FF(a,b,c,d,x[k+8], S11,0x698098D8);
                            d=md5_FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
                            c=md5_FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
                            b=md5_FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
                            a=md5_FF(a,b,c,d,x[k+12],S11,0x6B901122);
                            d=md5_FF(d,a,b,c,x[k+13],S12,0xFD987193);
                            c=md5_FF(c,d,a,b,x[k+14],S13,0xA679438E);
                            b=md5_FF(b,c,d,a,x[k+15],S14,0x49B40821);
                            a=md5_GG(a,b,c,d,x[k+1], S21,0xF61E2562);
                            d=md5_GG(d,a,b,c,x[k+6], S22,0xC040B340);
                            c=md5_GG(c,d,a,b,x[k+11],S23,0x265E5A51);
                            b=md5_GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
                            a=md5_GG(a,b,c,d,x[k+5], S21,0xD62F105D);
                            d=md5_GG(d,a,b,c,x[k+10],S22,0x2441453);
                            c=md5_GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
                            b=md5_GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
                            a=md5_GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
                            d=md5_GG(d,a,b,c,x[k+14],S22,0xC33707D6);
                            c=md5_GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
                            b=md5_GG(b,c,d,a,x[k+8], S24,0x455A14ED);
                            a=md5_GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
                            d=md5_GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
                            c=md5_GG(c,d,a,b,x[k+7], S23,0x676F02D9);
                            b=md5_GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
                            a=md5_HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
                            d=md5_HH(d,a,b,c,x[k+8], S32,0x8771F681);
                            c=md5_HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
                            b=md5_HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
                            a=md5_HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
                            d=md5_HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
                            c=md5_HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
                            b=md5_HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
                            a=md5_HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
                            d=md5_HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
                            c=md5_HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
                            b=md5_HH(b,c,d,a,x[k+6], S34,0x4881D05);
                            a=md5_HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
                            d=md5_HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
                            c=md5_HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
                            b=md5_HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
                            a=md5_II(a,b,c,d,x[k+0], S41,0xF4292244);
                            d=md5_II(d,a,b,c,x[k+7], S42,0x432AFF97);
                            c=md5_II(c,d,a,b,x[k+14],S43,0xAB9423A7);
                            b=md5_II(b,c,d,a,x[k+5], S44,0xFC93A039);
                            a=md5_II(a,b,c,d,x[k+12],S41,0x655B59C3);
                            d=md5_II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
                            c=md5_II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
                            b=md5_II(b,c,d,a,x[k+1], S44,0x85845DD1);
                            a=md5_II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
                            d=md5_II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
                            c=md5_II(c,d,a,b,x[k+6], S43,0xA3014314);
                            b=md5_II(b,c,d,a,x[k+13],S44,0x4E0811A1);
                            a=md5_II(a,b,c,d,x[k+4], S41,0xF7537E82);
                            d=md5_II(d,a,b,c,x[k+11],S42,0xBD3AF235);
                            c=md5_II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
                            b=md5_II(b,c,d,a,x[k+9], S44,0xEB86D391);
                            a=md5_AddUnsigned(a,AA);
                            b=md5_AddUnsigned(b,BB);
                            c=md5_AddUnsigned(c,CC);
                            d=md5_AddUnsigned(d,DD);
                    }
            return (md5_WordToHex(a)+md5_WordToHex(b)+md5_WordToHex(c)+md5_WordToHex(d)).toLowerCase();
    }

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