Keychain retrieval failure

Question

Created Mar ’18

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We have uploaded the latest version of our application to App store last week. Many users have updated it go latest version also. But for some users, getting exceptions while retrieving data from keychain. And this is causing the app to crash while launching itself.

After doing some analysis, we found that most of users with kechain issue are using iOS 11.2.6 and latest devices like iPhone 7 & iPhone 8 plus.

Kindly help us on finding the root cause, if you are came across any such issues. We are using keychainItemWrapper v1.2.

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Answer 1

DTS Engineer OP

Apple

Mar ’18

But for some users, getting exceptions while retrieving data from keychain.

What error are they getting back from the keychain APIs?

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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

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Answer 2

jenson.jacob OP

Mar ’18

They are getting the below exception:

*** Terminating app due to uncaught exception 'NSGenericException', reason: 'Keychain retrieve Error - Error Domain=NSCocoaErrorDomain Code=3840 "Cannot parse a NULL or zero-length data" UserInfo={NSDebugDescription=Cannot parse a NULL or zero-length data}'

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Answer 3

DTS Engineer OP

Apple

Mar ’18

That exception isn’t being raised by the keychain, which is a C API and thus returns error codes rather than raising Objective-C exceptions. You will have to dig into whatever keychain wrapper you’re using to uncover what’s going wrong at the API level.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

0

Answer 4

jenson.jacob OP

Mar ’18

Thanks for your reply. We have turned OFF keychain sharing in this release. Will that cause any retrieval failure from Keychain.

0

Answer 5

DTS Engineer OP

Apple

Mar ’18

We have turned OFF keychain sharing in this release. Will that cause any retrieval failure from Keychain.

It’s impossible to say without some more concrete details about what’s causing the problem in the first place.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

0