# 身份证校验js & shell

```javascript
var checkProv = function (val) {
    var pattern = /^[1-9][0-9]/;
    var provs = {11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门"};
    if(pattern.test(val)) {
        if(provs[val]) {
            return true;
        }
    }
    return false;
}
var checkDate = function (val) {
    var pattern = /^(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)$/;
    if(pattern.test(val)) {
        var year = val.substring(0, 4);
        var month = val.substring(4, 6);
        var date = val.substring(6, 8);
        var date2 = new Date(year+"-"+month+"-"+date);
        if(date2 && date2.getMonth() == (parseInt(month) - 1)) {
            return true;
        }
    }
    return false;
}
var checkCode = function (val) {
    var p = /^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;
    var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];
    var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];
    var code = val.substring(17);
    if(p.test(val)) {
        var sum = 0;
        for(var i=0;i<17;i++) {
            sum += val[i]*factor[i];
        }
        if(parity[sum % 11] == code.toUpperCase()) {
            return true;
        }
    }
    return false;
}
var checkID = function (val) {
    if(checkCode(val)) {
        var date = val.substring(6,14);
        if(checkDate(date)) {
            if(checkProv(val.substring(0,2))) {
                return true;
            }
        }
    }
    return false;
}
//输出 true
console.log(checkID("11010519491231002X"));
//输出 false，校验码不符
console.log(checkID("110105194912310021"));
//输出 false，日期码不符
console.log(checkID("110105194902310026"));
//输出 false，地区码不符
console.log(checkID("160105194912310029"));

```


## shell的身份证判断
```bash
#!/bin/bash

# 获取用户输入的身份证号码
while :
	do
		read -p "请输入身份证号码(Ctrl+C Exit): " idcard
		
        #身份证号码正则表达式  
		idcard_regex="^[1-9][0-9]{5}(18|19|20)[0-9]{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)[0-9]{3}[0-9Xx]$"
		
    #判断正则表达
    if [[ $idcard =~ $idcard_regex ]]; then
			echo "身份证号码合法，开始判断日期是否合法......"
			birthday=${idcard:6:4}-${idcard:10:2}-${idcard:12:2}
			timestamp=$(date -d "$birthday" +%s 2>/dev/null)
	        if [ $? -ne 0 ]; then
			    echo "输入的日期不合法，请重新输入。"
            else
                echo "输入的日期合法，开始判断校验位......"       
                # 提取出身份证号码中的前 17 位    
                idcard17=${idcard:0:17}
                # 计算校验位    
	            sum=0
                for i in {1..17}; do
                    num=${idcard17:i-1:1}
                    weight=$((2**(18-i)%11))
                    if [[ $num == "X" || $num == "x" ]]; then
                        num=10
                    fi
                    sum=$((sum + num * weight))
                done
                check=$((12 - sum % 11))
                if [[ $check == 10 ]]; then
                    check="X"
                fi
        # 比对校验位    
                if [[ ${idcard: -1} == $check ]]; then
                    echo "身份证校验位号码合法"
                else
                    echo "身份证号码校验位不正确"
                fi
	        fi
        else
            echo "身份证号码不合法"
        fi
done
```