iOS开发基础109-网络安全

合集 - iOS进阶(73)

1.iOS开发基础77-一像素线的几种实现方式2016-03-262.iOS开发基础78-iOS 国际化2016-03-263.iOS开发基础82-关于iOS目录2017-04-194.iOS开发基础81-Runtime实战2017-04-175.iOS开发基础80-关于Xcode82016-11-156.iOS开发基础79-强制退出程序2016-10-207.iOS开发基础90-密码学2018-08-038.iOS开发基础89-Runloop2018-08-029.iOS开发基础88-涂鸦效果2018-06-0410.iOS开发基础87-抽屉效果2018-06-0411.iOS开发基础86-FMDB2018-05-3012.iOS开发基础85-线程dispatch apply2017-07-1213.iOS开发基础84-HTTP请求方法详解与增删改查的应用2017-05-1214.iOS开发基础83-线程组2017-04-2815.iOS开发基础106-Instruments07-1616.iOS开发基础105-Xcode收集Crashs的各种方法07-1617.iOS开发基础104-正向代理和反向代理07-1618.iOS开发基础103-APP之间跳转07-1619.iOS开发基础102-后台保活方案07-1620.iOS开发基础101-指纹和面部识别07-1621.iOS开发基础100-MDM证书申请流程2022-03-2822.iOS开发基础99-iOS 内购的防范与优化2021-09-2823.iOS开发基础98-跳转淘宝案例2019-06-2024.iOS开发基础97-应用内购（In-App Purchase）的安全性解析与收据处理流程2019-06-0625.iOS开发基础96-UI类继承关系图2019-03-1926.iOS开发基础95-程序内评价2019-01-0727.iOS开发基础94-xcode102018-09-2528.iOS开发基础93-GCD死锁2018-09-0429.iOS开发基础92-线程保活2018-09-0430.iOS开发基础91-线程同步技术与资源共享详解2018-09-0431.iOS开发基础138-视频编码07-2332.iOS开发基础137-音视频编解码简介07-2333.iOS开发基础136-防暴力点击07-2334.iOS开发基础135-Core Data07-2235.iOS开发基础134-异步并行上传问题07-1836.iOS开发基础133-崩溃预防07-1837.iOS开发基础132-POSIX线程库07-1838.iOS开发基础131-isa指针07-1839.iOS开发基础130-视频录制上传07-1840.iOS开发基础129-音频录制上传07-1841.iOS开发基础128-应用本地化07-1842.iOS开发基础127-深入探讨KVO07-1743.iOS开发基础126-深入探索设计模式07-1744.iOS开发基础125-深入探索SDWebImage07-1745.iOS开发基础124-RunLoop实现卡顿检测07-1746.iOS开发基础123-自动释放池原理07-1747.iOS开发基础122-RunLoop07-1748.iOS开发基础121-APP启动优化07-1749.iOS开发基础120-通知与线程07-1750.iOS开发基础119-组件化07-1751.iOS开发基础118-Runtime07-1752.iOS开发基础117-Hybrid07-1753.iOS开发基础116-性能监控07-1754.iOS开发基础115-Socket07-1755.iOS开发基础114-YYCache07-1756.iOS开发基础113-Unity3D07-1757.iOS开发基础112-GCD常见场景07-1758.iOS开发基础111-RAC07-1759.iOS开发基础110-Core Graphics应用场景07-17

60.iOS开发基础109-网络安全07-17

61.iOS开发基础108-常见的编程范式07-1662.iOS开发基础107-iOS直播07-1663.iOS开发基础148-ABM vs MDM08-0564.iOS开发基础147-ABM集中管理Apple设备08-0565.iOS开发基础146-深入解析WKWebView08-0366.iOS开发基础145-Apple Search Ads08-0167.iOS开发基础144-逐字打印效果08-0168.iOS开发基础143-性能优化07-2669.iOS开发基础142-广告归因07-2570.iOS开发基础141-音频解码07-2371.iOS开发基础140-音频编码07-2372.iOS开发基础139-视频解码07-2373.iOS开发基础149-由UUIDString引发的思考08-09

收起

在iOS开发中，保障应用的网络安全是一个非常重要的环节。以下是一些常见的网络安全措施及对应的示例代码：

Swift版

1. 使用HTTPS

确保所有的网络请求使用HTTPS协议，以加密数据传输，防止中间人攻击。

示例代码：

在Info.plist中配置App Transport Security (ATS)：

<key>NSAppTransportSecuritykey>
<dict>
    <key>NSAllowsArbitraryLoadskey>
    <false/>
dict>

2. SSL Pinning

通过SSL Pinning可以确保应用程序只信任指定的服务器证书，防止被劫持到伪造的服务器。

示例代码：

import Foundation

class URLSessionPinningDelegate: NSObject, URLSessionDelegate {
  func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
        if let serverTrust = challenge.protectionSpace.serverTrust,
           SecTrustEvaluate(serverTrust, nil) == errSecSuccess,
           let serverCertificate = SecTrustGetCertificateAtIndex(serverTrust, 0) {

            let localCertificateData = try? Data(contentsOf: Bundle.main.url(forResource: "your_cert", withExtension: "cer")!)
            let serverCertificateData = SecCertificateCopyData(serverCertificate) as Data

            if localCertificateData == serverCertificateData {
                let credential = URLCredential(trust: serverTrust)
                completionHandler(.useCredential, credential)
                return
            }
        }
        completionHandler(.cancelAuthenticationChallenge, nil)
  }
}

// Usage
let url = URL(string: "https://yoursecurewebsite.com")!
let session = URLSession(configuration: .default, delegate: URLSessionPinningDelegate(), delegateQueue: nil)
let task = session.dataTask(with: url) { data, response, error in
    // Handle response
}
task.resume()

3. 防止SQL注入

在处理用户输入时，使用参数化查询来防止SQL注入攻击。

示例代码：

import SQLite3

func queryDatabase(userInput: String) {
    var db: OpaquePointer?
    // Open database (assuming dbPath is the path to your database)
    sqlite3_open(dbPath, &db)

    var queryStatement: OpaquePointer?
    let query = "SELECT * FROM users WHERE username = ?"
    
    if sqlite3_prepare_v2(db, query, -1, &queryStatement, nil) == SQLITE_OK {
        sqlite3_bind_text(queryStatement, 1, userInput, -1, nil)
        
        while sqlite3_step(queryStatement) == SQLITE_ROW {
            // Process results
        }
    }
    
    sqlite3_finalize(queryStatement)
    sqlite3_close(db)
}

4. Data Encryption

在存储敏感数据时，使用iOS的加密库来加密数据，比如使用Keychain。

示例代码：

import Security

func saveToKeychain(key: String, data: Data) -> OSStatus {
    let query: [String: Any] = [
        kSecClass as String: kSecClassGenericPassword,
        kSecAttrAccount as String: key,
        kSecValueData as String: data
    ]

    SecItemDelete(query as CFDictionary) // Delete any existing item
    return SecItemAdd(query as CFDictionary, nil) // Add new item
}

func loadFromKeychain(key: String) -> Data? {
    let query: [String: Any] = [
        kSecClass as String: kSecClassGenericPassword,
        kSecAttrAccount as String: key,
        kSecReturnData as String: kCFBooleanTrue!,
        kSecMatchLimit as String: kSecMatchLimitOne
    ]

    var dataTypeRef: AnyObject?
    let status: OSStatus = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)

    if status == noErr {
        return dataTypeRef as? Data
    } else {
        return nil
    }
}

5. 输入验证与清理

对用户输入进行验证和清理，防止XSS（跨站脚本攻击）和其他注入攻击。

示例代码：

func sanitize(userInput: String) -> String {
    // Remove any script tags or other potentially dangerous content
    return userInput.replacingOccurrences(of: "", with: "", options: .caseInsensitive)
}

// Usage
let userInput = ""
let sanitizedInput = sanitize(userInput: userInput)
print(sanitizedInput) // Outputs: alert('xss')

OC版

1. 使用HTTPS

确保所有的网络请求都使用HTTPS协议，以加密数据传输，防止中间人攻击。

示例代码：

在Info.plist中配置App Transport Security (ATS)：

<key>NSAppTransportSecuritykey>
<dict>
    <key>NSAllowsArbitraryLoadskey>
    <false/>
dict>

2. SSL Pinning

通过SSL Pinning可以确保应用程序只信任指定的服务器证书，防止被劫持到伪造的服务器。

示例代码：

#import 

@interface URLSessionPinningDelegate : NSObject 

@end

@implementation URLSessionPinningDelegate

- (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * _Nullable credential))completionHandler {
    if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
        SecTrustRef serverTrust = challenge.protectionSpace.serverTrust;
        SecCertificateRef serverCertificate = SecTrustGetCertificateAtIndex(serverTrust, 0);
        
        NSString *certPath = [[NSBundle mainBundle] pathForResource:@"your_cert" ofType:@"cer"];
        NSData *localCertData = [NSData dataWithContentsOfFile:certPath];
        NSData *serverCertData = (__bridge NSData *)(SecCertificateCopyData(serverCertificate));
        
        if ([localCertData isEqualToData:serverCertData]) {
            NSURLCredential *credential = [NSURLCredential credentialForTrust:serverTrust];
            completionHandler(NSURLSessionAuthChallengeUseCredential, credential);
            return;
        }
    }
    completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
}

@end

// Usage
NSURL *url = [NSURL URLWithString:@"https://yoursecurewebsite.com"];
NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
URLSessionPinningDelegate *pinningDelegate = [[URLSessionPinningDelegate alloc] init];
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig delegate:pinningDelegate delegateQueue:nil];

NSURLSessionDataTask *task = [session dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error == nil) {
        // Handle response
    }
}];
[task resume];

3. 防止SQL注入

在处理用户输入时，使用参数化查询来防止SQL注入攻击。

示例代码：

#import 

- (void)queryDatabase:(NSString *)userInput {
    sqlite3 *db;
    // Open database (assuming dbPath is the path to your database)
    if (sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK) {
        sqlite3_stmt *statement;
        const char *query = "SELECT * FROM users WHERE username = ?";
        
        if (sqlite3_prepare_v2(db, query, -1, &statement, NULL) == SQLITE_OK) {
            sqlite3_bind_text(statement, 1, [userInput UTF8String], -1, SQLITE_TRANSIENT);
            
            while (sqlite3_step(statement) == SQLITE_ROW) {
                // Process results
            }
        }
        
        sqlite3_finalize(statement);
        sqlite3_close(db);
    }
}

4. Data Encryption

在存储敏感数据时，使用iOS的加密库来加密数据，比如使用Keychain。

示例代码：

#import 

- (OSStatus)saveToKeychainWithKey:(NSString *)key data:(NSData *)data {
    NSDictionary *query = @{(__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
                            (__bridge id)kSecAttrAccount: key,
                            (__bridge id)kSecValueData: data};
    
    SecItemDelete((__bridge CFDictionaryRef)query); // Delete any existing item
    return SecItemAdd((__bridge CFDictionaryRef)query, NULL); // Add new item
}

- (NSData *)loadFromKeychainWithKey:(NSString *)key {
    NSDictionary *query = @{(__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
                            (__bridge id)kSecAttrAccount: key,
                            (__bridge id)kSecReturnData: (__bridge id)kCFBooleanTrue,
                            (__bridge id)kSecMatchLimit: (__bridge id)kSecMatchLimitOne};
    
    CFTypeRef dataTypeRef = NULL;
    OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &dataTypeRef);
    
    if (status == noErr) {
        return (__bridge_transfer NSData *)dataTypeRef;
    } else {
        return nil;
    }
}

5. 输入验证与清理

对用户输入进行验证和清理，防止XSS（跨站脚本攻击）和其他注入攻击。

示例代码：

- (NSString *)sanitize:(NSString *)userInput {
    // Remove any script tags or other potentially dangerous content
    NSString *sanitizedInput = [userInput stringByReplacingOccurrencesOfString:@"" withString:@"" options:NSCaseInsensitiveSearch range:NSMakeRange(0, sanitizedInput.length)];
    return sanitizedInput;
}

// Usage
NSString *userInput = @"";
NSString *sanitizedInput = [self sanitize:userInput];
NSLog(@"%@", sanitizedInput); // Outputs: alert('xss')

通过这些措施，你可以显著提升iOS应用的网络安全性。根据项目需求，灵活运用这些技术以确保用户数据的安全。