export default  class MMD5 {

    public constructor() {

    }
    private hexcase = 0;   /* hex output format. 0 - lowercase; 1 - uppercase        */
    private b64pad = "";  /* base-64 pad character. "=" for strict RFC compliance   */

    /*  
    * These are the privates you'll usually want to call  
    * They take string arguments and return either hex or base-64 encoded strings  
    */
    public hex_md5(s) { return this.rstr2hex(this.rstr_md5(this.str2rstr_utf8(s))); }//这个函数就行了，  
    public b64_md5(s) { return this.rstr2b64(this.rstr_md5(this.str2rstr_utf8(s))); }
    public any_md5(s, e) { return this.rstr2any(this.rstr_md5(this.str2rstr_utf8(s)), e); }
    public hex_hmac_md5(k, d) { return this.rstr2hex(this.rstr_hmac_md5(this.str2rstr_utf8(k), this.str2rstr_utf8(d))); }
    private b64_hmac_md5(k, d) { return this.rstr2b64(this.rstr_hmac_md5(this.str2rstr_utf8(k), this.str2rstr_utf8(d))); }
    private any_hmac_md5(k, d, e) { return this.rstr2any(this.rstr_hmac_md5(this.str2rstr_utf8(k), this.str2rstr_utf8(d)), e); }

    /*  
    * Perform a simple self-test to see if the VM is working  
    */
    public md5_vm_test() {
        return this.hex_md5("abc").toLowerCase() == "900150983cd24fb0d6963f7d28e17f72";
    }

    /*  
    * Calculate the MD5 of a raw string  
    */
    public rstr_md5(s) {

        return this.binl2rstr(this.binl_md5(this.rstr2binl(s), s.length * 8));
    }

    /*  
    * Calculate the HMAC-MD5, of a key and some data (raw strings)  
    */
    public rstr_hmac_md5(key, data) {
        var bkey = this.rstr2binl(key);
        if (bkey.length > 16) bkey = this.binl_md5(bkey, key.length * 8);

        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 = this.binl_md5(ipad.concat(this.rstr2binl(data)), 512 + data.length * 8);
        return this.binl2rstr(this.binl_md5(opad.concat(hash), 512 + 128));
    }

    /*  
    * Convert a raw string to a hex string  
    */
    public rstr2hex(input) {
        try { this.hexcase } catch (e) { this.hexcase = 0; }
        var hex_tab = this.hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
        var output = "";
        var x;
        for (var i = 0; i < input.length; i++) {
            x = input.charCodeAt(i);
            output += hex_tab.charAt((x >>> 4) & 0x0F)
                + hex_tab.charAt(x & 0x0F);
        }
        return output;
    }

    /*  
    * Convert a raw string to a base-64 string  
    */
    public rstr2b64(input) {
        try { this.b64pad } catch (e) { this.b64pad = ''; }
        var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
        var output = "";
        var len = input.length;
        for (var i = 0; i < len; i += 3) {
            var triplet = (input.charCodeAt(i) << 16)
                | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0)
                | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
            for (var j = 0; j < 4; j++) {
                if (i * 8 + j * 6 > input.length * 8) output += this.b64pad;
                else output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
            }
        }
        return output;
    }

    /*  
    * Convert a raw string to an arbitrary string encoding  
    */
    public rstr2any(input, encoding) {
        var divisor = encoding.length;
        var i, j, q, x, quotient;

        /* Convert to an array of 16-bit big-endian values, forming the dividend */
        var dividend = Array(Math.ceil(input.length / 2));
        for (i = 0; i < dividend.length; i++) {
            dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
        }

        /*  
        * Repeatedly perform a long division. The binary array forms the dividend,  
        * the length of the encoding is the divisor. Once computed, the quotient  
        * forms the dividend for the next step. All remainders are stored for later  
        * use.  
        */
        var full_length = Math.ceil(input.length * 8 /
            (Math.log(encoding.length) / Math.log(2)));
        var remainders = Array(full_length);
        for (j = 0; j < full_length; j++) {
            quotient = Array();
            x = 0;
            for (i = 0; i < dividend.length; i++) {
                x = (x << 16) + dividend[i];
                q = Math.floor(x / divisor);
                x -= q * divisor;
                if (quotient.length > 0 || q > 0)
                    quotient[quotient.length] = q;
            }
            remainders[j] = x;
            dividend = quotient;
        }

        /* Convert the remainders to the output string */
        var output = "";
        for (i = remainders.length - 1; i >= 0; i--)
            output += encoding.charAt(remainders[i]);

        return output;
    }

    /*  
    * Encode a string as utf-8.  
    * For efficiency, this assumes the input is valid utf-16.  
    */
    public str2rstr_utf8(input) {
        var output = "";
        var i = -1;
        var x, y;

        while (++i < input.length) {
            /* Decode utf-16 surrogate pairs */
            x = input.charCodeAt(i);
            y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
            if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
                x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
                i++;
            }

            /* Encode output as utf-8 */
            if (x <= 0x7F)
                output += String.fromCharCode(x);
            else if (x <= 0x7FF)
                output += String.fromCharCode(0xC0 | ((x >>> 6) & 0x1F),
                    0x80 | (x & 0x3F));
            else if (x <= 0xFFFF)
                output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
                    0x80 | ((x >>> 6) & 0x3F),
                    0x80 | (x & 0x3F));
            else if (x <= 0x1FFFFF)
                output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
                    0x80 | ((x >>> 12) & 0x3F),
                    0x80 | ((x >>> 6) & 0x3F),
                    0x80 | (x & 0x3F));
        }
        return output;
    }

    /*  
    * Encode a string as utf-16  
    */
    public str2rstr_utf16le(input) {
        var output = "";
        for (var i = 0; i < input.length; i++)
            output += String.fromCharCode(input.charCodeAt(i) & 0xFF,
                (input.charCodeAt(i) >>> 8) & 0xFF);
        return output;
    }

    public str2rstr_utf16be(input) {
        var output = "";
        for (var i = 0; i < input.length; i++)
            output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
                input.charCodeAt(i) & 0xFF);
        return output;
    }

    /*  
    * Convert a raw string to an array of little-endian words  
    * Characters >255 have their high-byte silently ignored.  
    */
    public rstr2binl(input) {
        var output = Array(input.length >> 2);
        for (var i = 0; i < output.length; i++)
            output[i] = 0;
        for (var i = 0; i < input.length * 8; i += 8)
            output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
        return output;
    }

    /*  
    * Convert an array of little-endian words to a string  
    */
    public binl2rstr(input) {
        var output = "";
        for (var i = 0; i < input.length * 32; i += 8)
            output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
        return output;
    }

    /*  
    * Calculate the MD5 of an array of little-endian words, and a bit length.  
    */
    public binl_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 = this.md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
            d = this.md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
            c = this.md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
            b = this.md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
            a = this.md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
            d = this.md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
            c = this.md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
            b = this.md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
            a = this.md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
            d = this.md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
            c = this.md5_ff(c, d, a, b, x[i + 10], 17, -42063);
            b = this.md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
            a = this.md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
            d = this.md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
            c = this.md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
            b = this.md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);

            a = this.md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
            d = this.md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
            c = this.md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
            b = this.md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
            a = this.md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
            d = this.md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
            c = this.md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
            b = this.md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
            a = this.md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
            d = this.md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
            c = this.md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
            b = this.md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
            a = this.md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
            d = this.md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
            c = this.md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
            b = this.md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);

            a = this.md5_hh(a, b, c, d, x[i + 5], 4, -378558);
            d = this.md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
            c = this.md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
            b = this.md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
            a = this.md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
            d = this.md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
            c = this.md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
            b = this.md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
            a = this.md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
            d = this.md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
            c = this.md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
            b = this.md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
            a = this.md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
            d = this.md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
            c = this.md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
            b = this.md5_hh(b, c, d, a, x[i + 2], 23, -995338651);

            a = this.md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
            d = this.md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
            c = this.md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
            b = this.md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
            a = this.md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
            d = this.md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
            c = this.md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
            b = this.md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
            a = this.md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
            d = this.md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
            c = this.md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
            b = this.md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
            a = this.md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
            d = this.md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
            c = this.md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
            b = this.md5_ii(b, c, d, a, x[i + 9], 21, -343485551);

            a = this.safe_add(a, olda);
            b = this.safe_add(b, oldb);
            c = this.safe_add(c, oldc);
            d = this.safe_add(d, oldd);
        }
        return [a, b, c, d];
    }

    /*  
    * These privates implement the four basic operations the algorithm uses.  
    */
    public md5_cmn(q, a, b, x, s, t) {
        return this.safe_add(this.bit_rol(this.safe_add(this.safe_add(a, q), this.safe_add(x, t)), s), b);
    }
    public md5_ff(a, b, c, d, x, s, t) {
        return this.md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
    }
    public md5_gg(a, b, c, d, x, s, t) {
        return this.md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
    }
    public md5_hh(a, b, c, d, x, s, t) {
        return this.md5_cmn(b ^ c ^ d, a, b, x, s, t);
    }
    public md5_ii(a, b, c, d, x, s, t) {
        return this.md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
    }

    /*  
    * Add integers, wrapping at 2^32. This uses 16-bit operations internally  
    * to work around bugs in some JS interpreters.  
    */
    public 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.  
    */
    public bit_rol(num, cnt) {
        return (num << cnt) | (num >>> (32 - cnt));
    }
}