Android in app purchase: Signature verification failed

This problem is still going on in the current Google billing version. Basically the android.test.purchased is broken; After you buy android.test.purchased the verifyPurchase function in Security.java will always fail and the QueryInventoryFinishedListener will stop at the line if (result.isFailure()); this is because the android.test.purchased item always fails the TextUtils.isEmpty(signature) check in Security.java as it is … Read more

How to retrieve Key Alias and Key Password for signed APK in android studio(migrated from Eclipse)

On the Mac, I found the keystore file path, password, key alias and key password in an earlier log report before I updated Android Studio. I launched the Console utility and scrolled down to ~/Library/Logs -> AndroidStudioBeta ->idea.log.1 (or any old log number) Then I searched for “android.injected.signing.store” and found this from an earlier date: … Read more

Difference between signature versions – V1 (Jar Signature) and V2 (Full APK Signature) while generating a signed APK in Android Studio?

It is a new signing mechanism introduced in Android 7.0, with additional features designed to make the APK signature more secure. It is not mandatory. You should check BOTH of those checkboxes if possible, but if the new V2 signing mechanism gives you problems, you can omit it. So you can just leave V2 unchecked … Read more

What is the difference between encrypting and signing in asymmetric encryption? [closed]

When encrypting, you use their public key to write a message and they use their private key to read it. When signing, you use your private key to write message’s signature, and they use your public key to check if it’s really yours. I want to use my private key to generate messages so only … Read more

Signing and verifying signatures with RSA C#

Your problem is at the beginning of the VerifyData method: public static bool VerifyData(string originalMessage, string signedMessage, RSAParameters publicKey) { bool success = false; using (var rsa = new RSACryptoServiceProvider()) { //Don’t do this, do the same as you did in SignData: //byte[] bytesToVerify = Convert.FromBase64String(originalMessage); var encoder = new UTF8Encoding(); byte[] bytesToVerify = encoder.GetBytes(originalMessage); … Read more

Signing PDFs on a server document using a signature from the user

If the certificate with a private key is on the client, then you need a client-side module to do signing. JavaScript won’t be enough as it won’t have access to the key on the client. While you can try calling CAPICOM from JavaScript, this is a partial (no PKCS#11 support), Windows-specific and obsolete solution. Better … Read more

How to sign an android apk file

The manual is clear enough. Please specify what part you get stuck with after you work through it, I’d suggest: https://developer.android.com/studio/publish/app-signing.html Okay, a small overview without reference or eclipse around, so leave some space for errors, but it works like this Open your project in eclipse Press right-mouse – > tools (android tools?) – > … Read more