zhujian_OA/js/sm4-未加密.js

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/**
 * 国密SM4加密算法
 * @author c.z.s
 * @email 1048829253@qq.com
 * @company GDT-ZWZX-DEV-PT
 * @date 2018-07
 */
function SM4_Context() {
    this.mode = 1;
    this.isPadding = true;
    this.sk = new Array(32);
}

function SM4() {
    this.SM4_ENCRYPT = 1;
    this.SM4_DECRYPT = 0;

    var SboxTable = [0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
        0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
        0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
        0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
        0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
        0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
        0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
        0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
        0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
        0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
        0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
        0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
        0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
        0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
        0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
        0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48];

    var FK = [0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc];

    var CK = [0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
        0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
        0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
        0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
        0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
        0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
        0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
        0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279];

    this.GET_ULONG_BE = function (b, i) {
        return (b[i] & 0xff) << 24 | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8) | (b[i + 3] & 0xff) & 0xffffffff;
    }

    this.PUT_ULONG_BE = function (n, b, i) {
        var t1 = (0xFF & (n >> 24));
        var t2 = (0xFF & (n >> 16));
        var t3 = (0xFF & (n >> 8));
        var t4 = (0xFF & (n));
        b[i] = t1 > 128 ? t1 - 256 : t1;
        b[i + 1] = t2 > 128 ? t2 - 256 : t2;
        b[i + 2] = t3 > 128 ? t3 - 256 : t3;
        b[i + 3] = t4 > 128 ? t4 - 256 : t4;
    }

    this.SHL = function (x, n) {
        return (x & 0xFFFFFFFF) << n;
    }

    this.ROTL = function (x, n) {
        var s = this.SHL(x, n);
        var ss = x >> (32 - n);
        return this.SHL(x, n) | x >> (32 - n);
    }


    this.sm4Lt = function (ka) {
        var bb = 0;
        var c = 0;
        var a = new Array(4);
        var b = new Array(4);
        this.PUT_ULONG_BE(ka, a, 0);
        b[0] = this.sm4Sbox(a[0]);
        b[1] = this.sm4Sbox(a[1]);
        b[2] = this.sm4Sbox(a[2]);
        b[3] = this.sm4Sbox(a[3]);
        bb = this.GET_ULONG_BE(b, 0);
        c = bb ^ this.ROTL(bb, 2) ^ this.ROTL(bb, 10) ^ this.ROTL(bb, 18) ^ this.ROTL(bb, 24);
        return c;
    }

    this.sm4F = function (x0, x1, x2, x3, rk) {
        return x0 ^ this.sm4Lt(x1 ^ x2 ^ x3 ^ rk);
    }

    this.sm4CalciRK = function (ka) {
        var bb = 0;
        var rk = 0;
        var a = new Array(4);
        var b = new Array(4);
        this.PUT_ULONG_BE(ka, a, 0);
        b[0] = this.sm4Sbox(a[0]);
        b[1] = this.sm4Sbox(a[1]);
        b[2] = this.sm4Sbox(a[2]);
        b[3] = this.sm4Sbox(a[3]);
        bb = this.GET_ULONG_BE(b, 0);
        rk = bb ^ this.ROTL(bb, 13) ^ this.ROTL(bb, 23);
        return rk;
    }



    this.sm4Sbox = function (inch) {
        var i = inch & 0xFF;
        var retVal = SboxTable[i];
        return retVal > 128 ? retVal - 256 : retVal;
    }

    this.sm4_setkey_enc = function (ctx, key) {
        if (ctx == null) {
            alert("ctx is null!");
            return false;
        }
        if (key == null || key.length != 16) {
            alert("key error!");
            return false;
        }
        ctx.mode = this.SM4_ENCRYPT;
        this.sm4_setkey(ctx.sk, key);

    };

    this.sm4_setkey = function (SK, key) {
        var MK = new Array(4);
        var k = new Array(36);
        var i = 0;
        MK[0] = this.GET_ULONG_BE(key, 0);
        MK[1] = this.GET_ULONG_BE(key, 4);
        MK[2] = this.GET_ULONG_BE(key, 8);
        MK[3] = this.GET_ULONG_BE(key, 12);
        k[0] = MK[0] ^ FK[0];
        k[1] = MK[1] ^ FK[1];
        k[2] = MK[2] ^ FK[2];
        k[3] = MK[3] ^ FK[3];
        for (var i = 0; i < 32; i++) {
            k[(i + 4)] = (k[i] ^ this.sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ CK[i]));
            SK[i] = k[(i + 4)];
        }

    }
    this.padding = function (input, mode) {
        if (input == null) {
            return null;
        }
        var ret = null;
        if (mode == this.SM4_ENCRYPT) {
            var p = parseInt(16 - input.length % 16);
            ret = input.slice(0);
            for (var i = 0; i < p; i++) {
                ret[input.length + i] = p;
            }
        } else {
            var p = input[input.length - 1];
            ret = input.slice(0, input.length - p);
        }
        return ret;
    }
    this.sm4_one_round = function (sk, input, output) {
        var i = 0;
        var ulbuf = new Array(36);
        ulbuf[0] = this.GET_ULONG_BE(input, 0);
        ulbuf[1] = this.GET_ULONG_BE(input, 4);
        ulbuf[2] = this.GET_ULONG_BE(input, 8);
        ulbuf[3] = this.GET_ULONG_BE(input, 12);
        while (i < 32) {
            ulbuf[(i + 4)] = this.sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
            i++;
        }
        this.PUT_ULONG_BE(ulbuf[35], output, 0);
        this.PUT_ULONG_BE(ulbuf[34], output, 4);
        this.PUT_ULONG_BE(ulbuf[33], output, 8);
        this.PUT_ULONG_BE(ulbuf[32], output, 12);

    }



    this.sm4_crypt_ecb = function (ctx, input) {
        if (input == null) {
            alert("input is null!");
        }
        if ((ctx.isPadding) && (ctx.mode == this.SM4_ENCRYPT)) {
            input = this.padding(input, this.SM4_ENCRYPT);
        }

        var i = 0;
        var length = input.length;
        var bous = new Array();
        for (; length > 0; length -= 16) {
            var out = new Array(16);
            var ins = input.slice(i * 16, (16 * (i + 1)));
            this.sm4_one_round(ctx.sk, ins, out)
            bous = bous.concat(out);
            i++;
        }

        var output = bous;
        if (ctx.isPadding && ctx.mode == this.SM4_DECRYPT) {
            output = this.padding(output, this.SM4_DECRYPT);
        }
        for (var i = 0; i < output.length; i++) {
            if (output[i] < 0) {
                output[i] = output[i] + 256;
            }
        }
        return output;
    }

    this.sm4_crypt_cbc = function (ctx, iv, input) {
        if (iv == null || iv.length != 16) {
            alert("iv error!");
        }

        if (input == null) {
            alert("input is null!");
        }

        if (ctx.isPadding && ctx.mode == this.SM4_ENCRYPT) {
            input = this.padding(input, this.SM4_ENCRYPT);
        }

        var i = 0;
        var length = input.length;
        var bous = new Array();
        if (ctx.mode == this.SM4_ENCRYPT) {
            var k = 0;
            for (; length > 0; length -= 16) {
                var out = new Array(16);
                var out1 = new Array(16);
                var ins = input.slice(k * 16, (16 * (k + 1)));

                for (i = 0; i < 16; i++) {
                    out[i] = (ins[i] ^ iv[i]);
                }
                this.sm4_one_round(ctx.sk, out, out1);
                iv = out1.slice(0, 16);
                bous = bous.concat(out1);
                k++;
            }
        }
        else {
            var temp = [];
            var k = 0;
            for (; length > 0; length -= 16) {
                var out = new Array(16);
                var out1 = new Array(16);
                var ins = input.slice(k * 16, (16 * (k + 1)));
                temp = ins.slice(0, 16);
                sm4_one_round(ctx.sk, ins, out);
                for (i = 0; i < 16; i++) {
                    out1[i] = (out[i] ^ iv[i]);
                }
                iv = temp.slice(0, 16);
                bous = bous.concat(out1);
                k++;
            }
        }

        var output = bous;
        if (ctx.isPadding && ctx.mode == this.SM4_DECRYPT) {
            output = this.padding(output, this.SM4_DECRYPT);
        }

        for (var i = 0; i < output.length; i++) {
            if (output[i] < 0) {
                output[i] = output[i] + 256;
            }
        }
        return output;
    }
}


function SM4Util() {
    this.secretKey = "11HDESaAhiHHugDz";//秘钥
    this.iv = "";
    this.hexString = false;

    this.encryptData_ECB = function (plainText) {
        try {
            var sm4 = new SM4();
            var ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = sm4.SM4_ENCRYPT;
            var keyBytes = stringToByte(this.secretKey);
            sm4.sm4_setkey_enc(ctx, keyBytes);
            var encrypted = sm4.sm4_crypt_ecb(ctx, stringToByte(plainText));
            var cipherText = base64js.fromByteArray(encrypted);
            if (cipherText != null && cipherText.trim().length > 0) {
                cipherText.replace(/(\s*|\t|\r|\n)/g, "");
            }
            return cipherText;
        } catch (e) {
            console.error(e);
            return null;
        }

    }

    this.encryptData_CBC = function (plainText) {
        try {
            var sm4 = new SM4();
            var ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = sm4.SM4_ENCRYPT;

            var keyBytes = stringToByte(this.secretKey);
            var ivBytes = stringToByte(this.iv);

            sm4.sm4_setkey_enc(ctx, keyBytes);
            var encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, stringToByte(plainText));
            var cipherText = base64js.fromByteArray(encrypted);
            if (cipherText != null && cipherText.trim().length > 0) {
                cipherText.replace(/(\s*|\t|\r|\n)/g, "");
            }
            return cipherText;
        }
        catch (e) {
            console.error(e);
            return null;
        }
    }

    stringToByte = function (str) {
        var bytes = new Array();
        var len, c;
        len = str.length;
        for (var i = 0; i < len; i++) {
            c = str.charCodeAt(i);
            if (c >= 0x010000 && c <= 0x10FFFF) {
                bytes.push(((c >> 18) & 0x07) | 0xF0);
                bytes.push(((c >> 12) & 0x3F) | 0x80);
                bytes.push(((c >> 6) & 0x3F) | 0x80);
                bytes.push((c & 0x3F) | 0x80);
            } else if (c >= 0x000800 && c <= 0x00FFFF) {
                bytes.push(((c >> 12) & 0x0F) | 0xE0);
                bytes.push(((c >> 6) & 0x3F) | 0x80);
                bytes.push((c & 0x3F) | 0x80);
            } else if (c >= 0x000080 && c <= 0x0007FF) {
                bytes.push(((c >> 6) & 0x1F) | 0xC0);
                bytes.push((c & 0x3F) | 0x80);
            } else {
                bytes.push(c & 0xFF);
            }
        }
        return bytes;
    }


    byteToString = function (arr) {
        if (typeof arr === 'string') {
            return arr;
        }
        var str = '',
            _arr = arr;
        for (var i = 0; i < _arr.length; i++) {
            var one = _arr[i].toString(2),
                v = one.match(/^1+?(?=0)/);
            if (v && one.length == 8) {
                var bytesLength = v[0].length;
                var store = _arr[i].toString(2).slice(7 - bytesLength);
                for (var st = 1; st < bytesLength; st++) {
                    store += _arr[st + i].toString(2).slice(2);
                }
                str += String.fromCharCode(parseInt(store, 2));
                i += bytesLength - 1;
            } else {
                str += String.fromCharCode(_arr[i]);
            }
        }
        return str;
    }
};