App crashes when performing Secure Backup

[nullnumber1]

Steps to reproduce

1. Navigate to Settings.
2. Go to the Security section.
3. Select Secure Backup and tap on "Set Up".
4. Choose any of the options:
   • "Use a Security Key"
   • "Use a Security Phrase"

Outcome

• First Attempt on "Set Up": When first pressing "Set Up", a pop-up appears with the message: Request failed: unauthorized (401).
• Second Attempt on "Set Up": After tapping "Set Up" a second time, the menu with backup options opens as expected.

Issues with Each Backup Option

1. "Use a Security Key"

   • Selecting "Use a Security Key" causes the app to crash immediately, without showing any options to share or copy the security key.
   • After the app crashes, the backup appears to be set up, but I wasn't able to backup the keys at the previous step.

2. "Use a Security Phrase"

   • Selecting "Use a Security Phrase" allows me to input the security phrase. However, the app crashes immediately after proceeding.
   • After crashing and logging out and back into my account, if I attempt to restore from the backup using the security phrase I entered, the backup fails to restore

Your phone model

Iphone 12/Ipad Pro 12.9 M1

Operating system version

IOS17.6.1/iPadOS18.0.1

Application version

Element 1.11.19

Homeserver

Self hosted synapse inside docker (matrixdotorg/synapse) with federations disabled (tried on tags v1.118.0; v1.119.0)

Will you send logs?

Yes

Note

• This issue was not present in the previous version of the app, where backup options worked as expected.
• When talking about current and previous versions of the app, I talk about AppStore versions

[matveytch]

Basically, have the same problem with such important feature, help please.

[NicolasBuquet]

@giomfo @pixlwave
The crash is due to a call in Matrix-ios-SDK to a method declared in the header file of Crypto/SecretStorage/MXSecretStorage but that is no more implemented.

The method is:

(MXHTTPOperation*)createKeyWithKeyId:(nullable NSString*)keyId
                               keyName:(nullable NSString*)keyName
                            passphrase:(nullable NSString*)passphrase
                               success:(void (^)(MXSecretStorageKeyCreationInfo *keyCreationInfo))success
                               failure:(void (^)(NSError *error))failure

Link to the header file declaration: https://github.com/matrix-org/matrix-ios-sdk/blob/34c66a0615173fb2d0252f8b9dc5d2650a58a847/MatrixSDK/Crypto/SecretStorage/MXSecretStorage.h#L92

[pixlwave]

There's a fix for this at matrix-org/matrix-ios-sdk#1885. I think it's blocked on a review. Pinging @Velin92 / @BillCarsonFr.

[NicolasBuquet]

I tested the fix on my side and I can confirm it addresses the quirk.

[Velin92]

The fix has been merged and will be available in the next update of the SDK

[NicolasBuquet]

Great. Thank you.