反逆向测试：验证HarmonyOS5应用防反编译能力的测试方法

以下为 ​​HarmonyOS 5应用防反编译能力测试的完整ArkTS实现方案​​，包含代码混淆检测、反编译防护验证和安全加固测试的代码示例：

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1. 反编译防护架构

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2. 基础防护检测

2.1 代码混淆检测

// obfuscation-checker.ets
import { DexAnalyzer } from '@ohos.security';

export function checkObfuscationLevel() {
  const analyzer = new DexAnalyzer('build/outputs/dex');
  const results = analyzer.analyze({
    minClassLength: 3,  // 类名最短长度
    minMethodLength: 2,  // 方法名最短长度
    reservedKeywords: ['main', 'init'] // 应被混淆的关键字
  });

  return {
    obfuscationRate: results.obfuscatedCount / results.totalCount,
    exposedClasses: results.exposedClasses
  };
}

2.2 字符串加密检测

// string-encryption.ets
import { StringScanner } from '@ohos.security';

export function findPlaintextSecrets() {
  const secrets = [
    'API_KEY',
    'DB_PASSWORD',
    'SECRET_SALT'
  ];

  return StringScanner.scanFiles('src/**/*.ets', {
    patterns: secrets,
    minEntropy: 4.5  // 最小信息熵阈值
  });
}

---

3. 原生库防护测试

3.1 SO库加固验证

// native-check.ets
import { ELFAnalyzer } from '@ohos.security';

export function verifyNativeProtection() {
  const analyzer = new ELFAnalyzer('lib/arm64-v8a');
  return {
    hasAntiDebug: analyzer.checkSection('.antidebug'),
    hasCodeSign: analyzer.checkSignature(),
    hasObfuscation: analyzer.checkSymbolsObfuscated()
  };
}

3.2 JNI调用混淆检测

// jni-check.ets
export function checkJNIVulnerabilities() {
  const jniMethods = CodeAnalyzer.findJNIMethods();
  return jniMethods.filter(method => 
    method.isExported && 
    !method.isObfuscated
  );
}

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4. 动态防护测试

4.1 调试器检测

// debugger-detector.ets
import { Process } from '@ohos.process';

export function checkDebuggerAttached() {
  return Process.isDebuggerConnected() || 
         Process.hasTracerPid();
}

// 防护实现
if (checkDebuggerAttached()) {
  Process.selfDestruct('Debugger detected');
}

4.2 内存篡改检测

// memory-guard.ets
export class MemoryGuard {
  private static SIGNATURE = 0xDEADBEEF;

  static protect(key: string) {
    const ptr = Memory.getAddress(key);
    Memory.writeInt(ptr, this.SIGNATURE);
    
    setInterval(() => {
      if (Memory.readInt(ptr) !== this.SIGNATURE) {
        Process.terminate('Memory tampered');
      }
    }, 1000);
  }
}

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5. 反编译模拟测试

5.1 APK伪编译测试

// apk-decompiler.ets
import { ApkTool } from '@ohos.security';

export async function simulateDecompile() {
  const decompiler = new ApkTool('build/outputs/app.hap');
  const result = await decompiler.run({
    tools: ['jadx', 'apktool'],
    timeout: 60_000
  });
  
  return {
    success: result.success,
    extracted: result.files.filter(f => 
      f.type === 'java' || f.type === 'resource'
    ),
    timeCost: result.timeCost
  };
}

5.2 关键逻辑暴露分析

// logic-exposure.ets
export function analyzeExposedLogic(decompiled: string[]) {
  const sensitivePatterns = [
    'authToken',
    'encryptionKey',
    'licenseCheck'
  ];
  
  return decompiled.flatMap(file => 
    sensitivePatterns.filter(pattern => 
      file.includes(pattern)
    )
  );
}

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6. 安全加固方案

6.1 代码混淆配置

// proguard-rules.pro
-keep class com.example.security.** { *; }
-optimizationpasses 5
-overloadaggressively
-repackageclasses ''
-allowaccessmodification

6.2 原生层加固

# build.gradle
android {
    externalNativeBuild {
        cmake {
            arguments '-DENABLE_LLVM_OBFUSCATION=ON'
        }
    }
}

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7. 自动化测试套件

7.1 防护测试用例

// security-test.ets
import { describe, it } from '@ohos.test';

describe('反编译防护测试', () => {
  it('代码混淆率应大于90%', () => {
    const { obfuscationRate } = checkObfuscationLevel();
    expect(obfuscationRate).toBeGreaterThan(0.9);
  });

  it('不应存在明文密钥', () => {
    const secrets = findPlaintextSecrets();
    expect(secrets).toHaveLength(0);
  });

  it('动态调试应触发防护', () => {
    mockDebuggerAttach();
    expect(() => checkDebuggerAttached()).toThrow();
  });
});

7.2 持续集成配置

# .github/workflows/anti-reverse.yml
name: Anti-Reverse Test
on: [push]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: huawei/anti-reverse-action@v1
        with:
          tools: jadx,apktool
          timeout: 120s

---

8. 安全评分模型

检测项	权重	达标要求
代码混淆率	30%	≥90%
字符串加密	20%	零明文敏感信息
动态调试防护	25%	100%触发
原生库加固	25%	通过所有检测项

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9. 常见加固方案

漏洞类型	防护措施	代码示例
反编译暴露逻辑	控制流扁平化	-obfuscation-flatten true
内存注入攻击	内存校验签名	MemoryGuard.protect()
动态调试	反调试检测	checkDebuggerAttached()
SO库逆向	LLVM混淆	-DENABLE_LLVM_OBFUSCATION

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10. 完整防护工作流

// security-workflow.ets
export async function runProtectionTests() {
  // 静态分析
  const obfuscation = checkObfuscationLevel();
  const secrets = findPlaintextSecrets();
  
  // 动态测试
  const nativeCheck = verifyNativeProtection();
  const decompileResult = await simulateDecompile();
  
  // 生成报告
  return {
    score: calculateSecurityScore(
      obfuscation, secrets, nativeCheck, decompileResult
    ),
    details: {
      obfuscation,
      exposedSecrets: secrets,
      nativeProtection: nativeCheck,
      decompileTime: decompileResult.timeCost
    }
  };
}

---

通过本方案可实现：

1. ​​90%+​​ 代码混淆覆盖率
2. ​​零​​ 敏感信息明文暴露
3. ​​实时​​ 动态调试防护
4. ​​企业级​​ 反编译抵抗能力