js 本地 localStorage aes加密

github.com/sytelus/Cry… git

引入

const key = CryptoJS.enc.Utf8.parse("N2841A3412APCD6F");  //十六位十六进制数作为密钥
const iv = CryptoJS.enc.Utf8.parse('AUCDTF12H41P34Y2');   //十六位十六进制数作为密钥偏移量
//解密方法
function Decrypt(word) {
    let encryptedHexStr = CryptoJS.enc.Hex.parse(word);
    let srcs = CryptoJS.enc.Base64.stringify(encryptedHexStr);
    let decrypt = CryptoJS.AES.decrypt(srcs, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });
    let decryptedStr = decrypt.toString(CryptoJS.enc.Utf8);
    return decryptedStr.toString();
}
//加密方法
function Encrypt(word) {
    let srcs = CryptoJS.enc.Utf8.parse(word);
    let encrypted = CryptoJS.AES.encrypt(srcs, key, { iv: iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });
    return encrypted.ciphertext.toString().toUpperCase();
}



/** 存入本地*/
function setToken(key, stringVal) {
    try {
        if (!localStorage) { return false; }
        var tem = new Date() - 1 // 当前的时间搓
        var today = new Date()
        let ZeroTime = new Date(new Date().toLocaleDateString()).getTime() // 今天0点的时间戳
        var time = ZeroTime + 22 * 60 * 60 * 1000 // 晚上十点的时间戳
        // var time = new Date(today.getFullYear(), today.getMonth() + 1, today.getDate(), 22).getTime() // 过期时间
        if(time > tem){ //当前的时间戳大于过期的 时间戳
            var cacheExpireDate = time
        }else{
            var cacheExpireDate = time + 24 * 60 * 60 * 1000 // 过期时间
        }
        var cacheVal = { val: stringVal, exp: cacheExpireDate };
        localStorage.setItem(Encrypt(key), Encrypt(JSON.stringify(cacheVal))); // 存入缓存值
        // console.log(key+":存入缓存，"+new Date(cacheExpireDate)+"到期");
    } catch (e) {
        console.log(e)
    }
}
function getToken(key) { // 取
    try {
        if (!localStorage) { return false; }
        var cacheVal = localStorage.getItem(Encrypt(key));
        var result = JSON.parse(Decrypt(cacheVal));
        var now = new Date() - 1; // 当前时间搓
        if (!result) { return null; }//缓存不存在 // 本地时间
        if (now > result.exp) {//缓存过期
            console.log(Encrypt(key));
            removelocalStorage(Encrypt(key));
            return "";
        }
        return result.val;
    } catch (e) {
        removelocalStorage(key);
        return null;
    }
}

/**移除缓存，一般情况不手动调用，缓存过期自动调用*/
function removelocalStorage(key) {
    if (!localStorage) { return false }
    localStorage.removeItem(key)
}