js 异或加密

　　　　　// 按位异或 加密
        var posNo = 'C0041710190002'
        // 特殊字符不进行 与或 加密 （因为A,a,Z,z，转换后会变成符号，不方面用户输入，也可自己定义）
        var special = {
            'A': 1,
            'a': 1,
            'Z': 1,
            'z': 1
        }

        console.log('xor: ', bitEncrypt(posNo))  // xor:  B1150601081113

        function bitEncrypt (data) {
            var data = data || ''
            var arr = data.split('')
            
            var result = arr.map(function (item) {
                if (!special[item]) {
                    return xor(item)
                } else {
                    return item
                }
            })
            return result.join('')
        }

        function xor(msg) {
            var isNum = /[0-9]/.test(msg)
            if (isNum) {
                return +msg ^ 1
            } else {
                var num10 = msg.charCodeAt()
                var numXOR = num10 ^ 1
                return String.fromCharCode(numXOR)
            }
        }