104 lines
3.2 KiB
JavaScript
104 lines
3.2 KiB
JavaScript
const EncAndDec = {
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AesKey: 'MIGfMA0GCSqGSIb3',
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/**
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* AES加密
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* @param {*} word 需要加解密的文本
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* @param {*} key 加解密的秘钥
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* iv: 偏移量，最短8位数，ECB模式不需要此参数
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* @returns
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*/
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encryptData(data, key = this.AesKey) {
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// 将数据转换为 WordArray
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const dataWA = CryptoJS.enc.Utf8.parse(data);
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// 将密钥转换为 WordArray
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const keyWA = CryptoJS.enc.Utf8.parse(key);
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// 生成随机 IV（初始化向量）
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const iv = CryptoJS.lib.WordArray.random(16);
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// 加密
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const encrypted = CryptoJS.AES.encrypt(dataWA, keyWA, {
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iv: iv,
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mode: CryptoJS.mode.CBC,
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padding: CryptoJS.pad.Pkcs7
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});
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// 将 IV 和密文组合在一起
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const combined = iv.concat(encrypted.ciphertext);
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// 将组合后的数据转换为 Base64 字符串
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return CryptoJS.enc.Base64.stringify(combined);
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},
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/**
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* AES解密
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* @param string word
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* @param string key
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* @returns string
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*/
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Decrypt(word = '', key = this.AesKey) {
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if (word.length == 0) return null
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let decodeBase64Str = atob(word)
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let signData = decodeBase64Str.slice(16);
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let encrypted = atob(signData);
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encrypted = JSON.parse(encrypted);
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const iv = CryptoJS.enc.Base64.parse(encrypted.iv);
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const value = encrypted.value;
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key = CryptoJS.enc.Base64.parse(key);
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var decrypted = CryptoJS.AES.decrypt(value, key, {
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iv: iv
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});
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decrypted = decrypted.toString(CryptoJS.enc.Utf8);
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return decrypted;
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},
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decryptData(encryptedData, key = this.AesKey) {
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// 将 Base64 编码的字符串转换为 WordArray
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const encryptedDataWA = CryptoJS.enc.Base64.parse(encryptedData);
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// 提取 IV（初始化向量）。CryptoJS WordArray 对象的 sigBytes 属性表示字节数
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const iv = CryptoJS.lib.WordArray.create(encryptedDataWA.words.slice(0, 4), 16);
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// 提取密文
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const ciphertext = CryptoJS.lib.WordArray.create(encryptedDataWA.words.slice(4), encryptedDataWA.sigBytes - 16);
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// 转换密钥为 WordArray
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const keyWA = CryptoJS.enc.Utf8.parse(key);
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// 解密
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const decrypted = CryptoJS.AES.decrypt({ ciphertext: ciphertext }, keyWA, {
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iv: iv,
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mode: CryptoJS.mode.CBC,
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padding: CryptoJS.pad.Pkcs7
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});
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// 将解密结果转换为 UTF8 字符串
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return decrypted.toString(CryptoJS.enc.Utf8);
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},
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/**
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* 图片解密
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* @param string strImgBase64
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* @param object GetData
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* @returns string
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*/
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DecryptImg(strImgBase64, GetData) {
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let strBase64Content = `data:image/png;base64,${strImgBase64}`;
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let strImgId = "#" + GetData.id + ""
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let strImgUrl = $(strImgId).attr('data-original')
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if (strImgUrl == GetData.imgurl) {
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$(strImgId).attr('src', strBase64Content)
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$(strImgId).removeClass("jqlazyload");
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setImgHeightFun(strImgId)
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}
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return strBase64Content
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},
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}
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