AndroidネイティブCでAPK署名署名を取得するにはどうすればよいですか？

Question

セキュリティ目的のためにApkの署名を確認するために、ネイティブCコードでApp署名の署名を取得する必要があります。

Answer 1

多くの研究の結果、私はこのコードに到達し、署名& IssuerDNを得ることができました。

JNIEXPORT void JNICALL 
Java_org_telegram_messenger_ApplicationLoader_st(JNIEnv *env, jobject obj) 
{ 
    jclass cls = (*env)->GetObjectClass(env, obj); 
    jmethodID mid = (*env)->GetMethodID(env, cls,"getPackageManager" ,"()Landroid/content/pm/PackageManager;"); 
    jobject packageManager = (*env)->CallObjectMethod(env, obj, mid); 

    // this.getPackageName() 
    mid = (*env)->GetMethodID(env, cls, "getPackageName", "()Ljava/lang/String;");// 
    jstring packageName = (jstring) (*env)->CallObjectMethod(env, obj, mid); 

    // packageManager->getPackageInfo(packageName, GET_SIGNATURES); 
    cls = (*env)->GetObjectClass(env, packageManager); 
    mid = (*env)->GetMethodID(env, cls, "getPackageInfo", "(Ljava/lang/String;I)Landroid/content/pm/PackageInfo;"); 
    jint flags = 0x00000040; 
    jobject packageInfo = (*env)->CallObjectMethod(env, packageManager, mid, packageName, flags); 

    // packageInfo->signatures 
    cls = (*env)->GetObjectClass(env, packageInfo); 
    jfieldID fid = (*env)->GetFieldID(env, cls, "signatures", "[Landroid/content/pm/Signature;"); 
    jobject signatures = (*env)->GetObjectField(env, packageInfo, fid); 

    // signatures[0] 
    jobject signature = (*env)->GetObjectArrayElement(env, signatures, 0); 

    // signature->toByteArray() 
    cls = (*env)->GetObjectClass(env, signature); 
    mid = (*env)->GetMethodID(env, cls, "toByteArray", "()[B"); 
    jbyteArray appSig = (*env)->CallObjectMethod(env, signature, mid); 

    // X509Certificate appCertificate = X509Certificate.getInstance(appSignature.toByteArray()); 
    cls = (*env)->FindClass(env,"javax/security/cert/X509Certificate"); 
    if(cls !=0) { 
     int mid_static = (*env)->GetStaticMethodID(env, cls, "getInstance", "([B)Ljavax/security/cert/X509Certificate;"); 
     if (mid_static != 0) { 
      jobject cerObj = (jstring) (*env)->CallStaticObjectMethod(env, cls, mid_static,appSig);// 
      jclass tmpCls = (*env)->GetObjectClass(env, cerObj); 
      jmethodID mid = (*env)->GetMethodID(env, tmpCls, "getIssuerDN","()Ljava/security/Principal;");    

      //Principal tmpObj = appCertificate.getIssuerDN(); 
      jobject tmpObj = (*env)->CallObjectMethod(env, cerObj, mid); 

      cls = (*env)->GetObjectClass(env, tmpObj); 
      int mid2 = (*env)->GetMethodID(env, cls, "toString", "()Ljava/lang/String;"); 
      jstring ow = (jstring) (*env)->CallObjectMethod(env, tmpObj, mid2);//get app Owner 

      const char *tmpOW = (*env)->GetStringUTFChars(env, ow, 0);   
     } 
    } 
} 

Answer 2

チェックアウトthis GitHubリンク。それは私が今までに持っている最高の解決策です。それは私のために働いた。それは、アプリケーションの署名を返します。