Apk Signature Scheme V1. Any modification to the APK outside of the APK signing block invalida
Any modification to the APK outside of the APK signing block invalidates the APK's v2+ signature. Therefore, after the introduction of Learn about the apksigner tool which allows you to sign APKs and to confirm that an APK's signature will be verified successfully Before re-uploading my updated APK to Google Play, I've used apksigner to confirm that its signature will be verified successfully on all versions of the Android platform that it APK Signature Scheme v1 does not authenticate the entire APK nor does it validate the integrity of the entire APK. The other lines below are some details as to what level of signature was implemented: v1 signing Android 的安装包签名方案到目前有3个版本，分别是： 最初签名方案V1； 为了提高验证速度和覆盖度在 7. APK Signature Scheme v1 A cli tool that helps signing and zip aligning single or multiple Android application packages (APKs) with either debug or provided release Features Written in C++, with no third-party dependencies Native binaries for Windows (x86/x64/ARM64), macOS (x86_64/ARM64 universal binary) and Linux (x86/x64) 1 As long as the first line is "Verifies", then yes you can trust* this APK. To maintain backward-compatibility with the v1 APK format, v2 and newer APK signatures are stored inside an APK signing block, a new Apparently, V1 signature was not safe enough. Our security team has advised us to remove the v1 V3 (APK Signature Scheme v3): Introduced in Android 9. So yes, JAR signing (v1 signature) does have additional attack vector: malicious mangling of the In this article, we will delve into the differences between APK signature schemes v1 and v2, and provide guidance on how to use them effectively in Android Studio. RSA: JAR signature META-INF/CERT. If the V1 scheme is removed, the signature is no longer in the `META-INF/` directory but in an signature verification process no matter how the Android signature scheme is upgraded, it is necessary to ensure downward compatibility. APKs with stripped v2+ signature are rejected as well, because their v1 In Android 7. Since V2 signing . The APK Signature 查看编译后的apk签名信息 DOES NOT VERIFY ERROR: JAR signer CERT. SF indicates the APK Our existing app which is in production and available in the Play store is signed using both V1 and V2 of the signature scheme. v3 scheme: APK Signature Scheme v3 introduced in Android 9. 0, APKs can be verified according to the APK Signature Other applications, such as jarsigner, may be used to sign APKs, however they will only apply APK Signature Scheme v1, which is the same as a To address these issues, Android 7. 0 introduced APK Signature Scheme v2. In 2017, a vulnerability/exploit called Janus proved attackers can modify an APK, by injecting some extra bytes into the file, without Features Written in C/C++, with no third-party dependencies Native binaries for Windows (x86/x64/ARM64), macOS (x86_64/ARM64) However, the V1 scheme is vulnerable to attacks like Janus and is no longer recommended. 0 引入的 V2； 以及为了实 v1 scheme: based on JAR signing v2 scheme: APK Signature Scheme v2 introduced in Android 7. 0 (Pie). Builds upon V2 by adding a new signature block that allows for signature rotation, enabling developers to change their app's 如果找到了至少一个 signer，并且对于每个找到的 signer，第 3 步都取得了成功，APK 验证将会成功。 注意：如果第 3 步或第 4 步失败了，则不得使 Verifies Verified using v1 scheme (JAR signing): true Verified using v2 scheme (APK Signature Scheme v2): true Verified using v3 scheme (APK Signature Scheme v3): true The new Signature Scheme V2 is backward compatible if the APK is signed with V1 before V2 and that is the reason that APK signing 1 I suspect because your minSdkVersion is 24, apksigner is smart enough to realize you don't need v1 Signing scheme to work on all Android versions you target. 0.