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EncryptRequest.js
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import { FetchRequest } from './FetchRequest';
import {
RSAEncrypt,
AESGCMEncrypt,
AESGCMDecrypt,
generateAESRandomKey,
generateAESRandomIV
} from './RequestcryptUtil';
import URI from 'urijs';
/**
* @class EncryptRequest
* @category iServer Core
* @classdesc 加密请求地址
* @param {string} serverUrl - iServer 服务地址。如：http://127.0.0.1:8090/iserver。
* @version 11.2.0
* @usage
*/
export class EncryptRequest {
constructor(serverUrl) {
this.serverUrl = serverUrl;
this.tunnelUrl = undefined;
this.blockedUrlRegex = {
HEAD: [],
POST: [],
GET: [],
PUT: [],
DELETE: []
};
this.encryptAESKey = generateAESRandomKey();
this.encryptAESIV = generateAESRandomIV();
}
/**
* @function EncryptRequest.prototype.request
* @description 加密请求地址。
* @param {Object} config - 加密请求参数。
* @param {string} config.method - 请求方法。
* @param {string} config.url - 请求地址。
* @param {string} config.params - 请求参数。
* @param {Object} config.options - 请求的配置属性。
* @returns {Promise} Promise 对象。
*/
async request(options) {
if (!this.serverUrl) {
throw 'serverUrl can not be empty.';
}
const config = Object.assign({ baseURL: '' }, options);
const tunnelUrl = await this._createTunnel();
if (!tunnelUrl) {
return;
}
for (const pattern of this.blockedUrlRegex[config.method.toUpperCase()]) {
const regex = new RegExp(pattern);
if (regex.test(config.baseURL + config.url)) {
const data = {
url: config.baseURL + (config.url.startsWith('/') ? config.url.substring(1, config.url.length) : config.url),
method: config.method,
timeout: config.timeout,
headers: config.headers,
body: config.data
};
// 替换请求
config.method = 'post';
config.data = AESGCMEncrypt(this.encryptAESKey, this.encryptAESIV, JSON.stringify(data));
if (!config.data) {
throw 'encrypt failed';
}
config.url = this.tunnelUrl;
break;
}
}
const response = await FetchRequest.commit(config.method, config.url, config.data, config.options);
if (config.url === this.tunnelUrl) {
const result = await response.text();
const decryptResult = AESGCMDecrypt(this.encryptAESKey, this.encryptAESIV, result);
if (!decryptResult) {
console.debug('解密请求响应失败');
return;
}
const resultData = JSON.parse(decryptResult);
const resData = Object.create({
json: function () {
return Promise.resolve(resultData.data);
}
});
return Object.assign(resData, resultData);
}
return response;
}
/**
* @private
* @description 获取RSA public key
* @function EncryptRequest.prototype._getRSAPublicKey
*/
async _getRSAPublicKey() {
try {
const response = await FetchRequest.get(URI(this.serverUrl).segment('services/security/tunnel/v1/publickey').toString());
// 解析publicKey
const publicKeyObj = await response.json();
// 生成AES密钥
const aesKeyObj = {
key: this.encryptAESKey,
iv: this.encryptAESIV,
mode: 'GCM',
padding: 'NoPadding'
};
// 将AES密钥使用RSA公钥加密
const aesCipherText = RSAEncrypt(publicKeyObj.publicKey, aesKeyObj.key + aesKeyObj.iv);
return aesCipherText;
} catch (error) {
console.debug('RSA公钥获取失败，错误详情：' + error);
}
}
/**
* @private
* @description 创建隧道
* @function EncryptRequest.prototype._createTunnel
*/
async _createTunnel() {
if (!this.tunnelUrl) {
try {
const data = await this._getRSAPublicKey();
if (!data) {
throw 'fetch RSA publicKey failed';
}
// 创建隧道
const response = await FetchRequest.post(URI(this.serverUrl).segment('services/security/tunnel/v1/tunnels').toString(), data);
const result = await response.json();
Object.assign(this, {
tunnelUrl: result.tunnelUrl,
blockedUrlRegex: Object.assign({}, this.blockedUrlRegex, result.blockedUrlRegex)
});
} catch (error) {
console.debug('安全隧道创建失败，错误详情：' + error);
}
}
return this.tunnelUrl;
}
}
/**
* @function getServiceKey
* @version 11.2.0
* @category iServer Core
* @description 获取矢量瓦片解密密钥
* @param {string} serviceUrl - iServer 服务地址。例如：http://127.0.0.1:8090/iserver/services/xxx、http://127.0.0.1:8090/iserver/services/xxx/rest/maps、http://127.0.0.1:8090/iserver/services/xxx/restjsr/v1/vectortile。
* @return {Promise} options - 矢量瓦片密钥和加密算法类型。例如 { serviceKey, algorithm }。
* @usage
* ```
* // 浏览器
* <script type="text/javascript" src="{cdn}"></script>
* <script>
* const result = {namespace}.getServiceKey(serviceUrl);
*
* </script>
*
* // ES6 Import
* import { getServiceKey } from '{npm}';
*
* const result = getServiceKey(serviceUrl);
* ```
*/
export async function getServiceKey(serviceUrl) {
try {
const workspaceServerUrl = ((serviceUrl &&
serviceUrl.match(/.+(?=(\/restjsr\/v1\/vectortile\/|\/rest\/maps\/|\/rest\/data\/))/)) ||
[])[0];
if (!workspaceServerUrl) {
return;
}
const servicesResponse = await FetchRequest.get(workspaceServerUrl);
const servicesResult = await servicesResponse.json();
const matchRestData = (servicesResult || []).find(
(item) => serviceUrl.includes(item.name) && item.serviceEncryptInfo
);
if (!matchRestData) {
return;
}
const iserverHost = workspaceServerUrl.split('/services/')[0];
const encryptRequest = new EncryptRequest(iserverHost);
const svckeyUrl =
matchRestData && `${iserverHost}/services/security/svckeys/${matchRestData.serviceEncryptInfo.encrptKeyID}.json`;
const svcReponse = await encryptRequest.request({
method: 'get',
url: svckeyUrl
});
const serviceKey = await svcReponse.json();
if (!serviceKey) {
return;
}
return {
serviceKey,
algorithm: matchRestData.serviceEncryptInfo.encrptSpec.algorithm
};
} catch (error) {
console.error(error);
}
}