SoylentNews

Phoenix666 [soylentnews.org] writes:

Back in 2012, during the early days of KeepSafe, we sought to implement an encryption scheme for our Android App. Through many iterations and prototypes, we found a sweet spot of sorts by leveraging the power of the JNI (Java Native Interface.) We decided to write our interface into the encryption library we utilized in Java, calling into the library via the JNI solely for the purpose of encryption and decryption. We opted for an on-the-fly solution, minimizing the impact on user experience as much as possible. Once we were happy with our solution, we decided to deploy it into our production app. We rigorously tested our code and were confident that everything would go smoothly; that is, until things beyond our control broke.

As we anxiously refreshed our crash reports following our release, we started to notice a recurring error. Users were running into an “UnsatisfiedLinkError”, which means that either A) the native library we were calling into did not exist or B) the native method we were calling did not exist [medium.com]. Since B) would almost always be caught via compiling and basic testing, we were immediately perplexed at the fact that users’ installations did not have the native libraries we shipped within the APK.

That's the agony and ecstasy of software development right there, pal.

Original Submission