小程序开发AES-128-CFB，加密结果不对解密出来却是对的，而且正式数据会冒出两个多余字节

[诗音shiyin]

这是测试的代码，

 var text = crypto.Utf8.parse(String.fromCharCode(0x11, 0x22, 0x33, 0x44, 0x55, 0x66));
        console.log('----------------------------------------------------------明文：', text);

        var keys = hexMD5(0xBC, 0x9A, 0x78, 0x56, 0x34, 0x12);
        var XMD5Keys = crypto.Utf8.parse(this.DEE(keys));
        console.log('----------------------------------------------------------密钥：', XMD5Keys);

        var iv = hexMD5(0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xef,0xcd,0xab,0x89,0x67,0x45,0x23,0x01);
        var EMD5iv = crypto.Utf8.parse(this.DEE(iv));
        console.log('----------------------------------------------------------向量：', EMD5iv);


        var mi = new crypto.AES().encrypt(text, XMD5Keys, {iv: EMD5iv,mode: crypto.Mode.CFB,padding: crypto.Padding.NoPadding});
        console.log('----------------------------------------------------------加密:', this.DEE(mi.ciphertext.toString()));

        var v  = new crypto.AES().decrypt(mi.toString(), XMD5Keys, {iv: EMD5iv,mode: crypto.Mode.CFB, padding: crypto.Padding.NoPadding});
        console.log('----------------------------------------------------------解密:', this.DEE(v.toString()));

这是正式的

 
        var text = crypto.Utf8.parse(String.fromCharCode(0xA5, 0xB1, 0x04, 0x01, 0x00));

        var XMD5Keys = crypto.Utf8.parse(this.DEE(hexMD5(this.DEE(2a6938114530))));
        var EMD5iv = crypto.Utf8.parse(this.DEE(hexMD5(this.DEE(e6ff6b0257d5de7ea610f219d29feb69))));


        var mi = new crypto.AES().encrypt(text, XMD5Keys, { iv: EMD5iv, mode: crypto.Mode.CFB, padding: crypto.Padding.NoPadding });
        var mi1 = mi.ciphertext.toString();
        var mi2 = mi1.toUpperCase();    
        console.log('----------------------------------------------------------加密:', this.DEE(mi1));


        var v = new crypto.AES().decrypt(mi.toString(), XMD5Keys, {iv:EMD5iv,mode:crypto.Mode.CFB,padding:crypto.Padding.NoPadding});
        console.log('----------------------------------------------------------解密:', this.DEE(v.toString()));




        var typedArray = new Uint8Array(mi2.match(/[\da-f]{2}/gi).map(function (h) {
            return parseInt(h, 16)
        }))
        var buffer1 = typedArray.buffer

        wx.writeBLECharacteristicValue({
            deviceId: this.data.deviceId,
            serviceId: this.data.service_id,
            characteristicId: this.data.characteristics,
            value: buffer1,
            success: function (res) {
                console.log('发送数据：' + '√');
            },
        })

这是DEE的代码，用来把一个字符串转成 0x11，0x22 这种格式

 DEE: function(num) {
        var num = num.toUpperCase();
        var num = (num || 0).toString();
        var result = '';
        while(num.length > 2) {
            result = ',0x' + num.slice(-2) + result;
            num = num.slice(0, num.length - 2);
        }
        if (num) { result = num + result; }
        return '0x' + result;
    },

求助！