biometrics | fingerprint recognition | Authentication library
kandi X-RAY | biometrics Summary
kandi X-RAY | biometrics Summary
Some implementations of fingerprint recognition algorithms developed for Biometric Methods course at University of Wrocław, Poland.
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QUESTION
With OpenSSL I created a certificate using the following.
openssl req -x509 -newkey rsa:4096 -keyout myKey.pem -out cert.pem -days 365 -nodes
=> Hitting enter on all prompts
openssl pkcs12 -export -out keyStore.p12 -inkey myKey.pem -in cert.pem -name "alias" -passout pass:123
=>Transferring keyStore.p12
and cert.pem
to my android device (S10+)
=>Checked in cert.pem
in settings
Then I tried to check In keyStore.p12
: android settings > Biometrics and Security > Other Security Settings > Install from device storage > VPN and app user certificate > typed in the password “123”
Android returns “Invalid Password” but I know the password is correct (double checked it on my windows machine)
I've already tried to leave the password blank, restarted my phone and computer, generated a new certificate and verified the password multiple times etc.
I´m really at a loss here. thanks for any help in advance!
...ANSWER
Answered 2022-Mar-30 at 22:17Found the answer on accident. I installed "Win64 OpenSSL v1.1.1n" and created the certificate wth that version instead of "Win64 OpenSSL v3.0.2", which resolved the problem
QUESTION
I am using BiometricManager (Introduced in Api 29) in a project with a minSdkVersion of 26.
To my surprise, the project is compiling and running, I would have expected this to throw an error at buildtime. Am I missing something? Will this cause issues on release?
Gradle:
...ANSWER
Answered 2022-Mar-18 at 14:00I am using BiometricManager
No, you are not... at least, not the one that you linked to. You linked to android.hardware.biometrics.BiometricsManager
. Your code uses androidx.biometrics.BiometricsManager
. Those are not the same class. The Jetpack (androidx
) edition will have code that tries to support older devices gracefully.
QUESTION
I am creating a PAM module to show a QR code to users that are trying to log onto a system over SSH to allow them to scan it and authenticate using biometrics on their phone. Is there a way to pass unicode characters into the PAM conv function to allow the application to display them to the user?
The reason I need to hand in unicode characters is because I want to use the uincode character █ (U+2588 Full Block
) as a way to print the QR code to the screen.
I have tried using the type wchar_t
to hand in the value and also just trying to hand it in as char but both end up printing the missing character question mark to the screen.
If this is not possible is there a way of being able to show a QR code prior to authentication at all or is regular text the only possible thing to show?
Pam conv struct from PAM source:
...ANSWER
Answered 2021-Oct-31 at 21:12You can try encoding your Unicode data as UTF-8. That's the most commonly used encoding on Linux, and many programs justifiably refuse to support anything else. Unless you need to emit U+0000, you can use a standard C string to store all your Unicode code points in UTF-8.
However, if your goal is to print the QR code on a terminal, you may end up with problems, since terminal characters are usually not square and there is no standard proportion for them. Thus, it's possible that your QR code won't render acceptably on the terminal and that it will be difficult or impossible to read for the phone. There are programs that do this, so presumably it works in at least some cases, although it may not work everywhere. You may find that libqrencode
is useful in your endeavours.
QUESTION
My app is an unofficial version of Telegram app that has been already published in Play Store. For first publishing and a few updates afterward, there was no problem for login from Google. But my last update was rejected as below:
Issue: Need login credentials for app review In order for us to review your app for compliance with Developer Program Policies, we will need you to provide valid login credentials for your app. If users need credentials to access your app, please provide all appropriate credentials via Play Console. If you previously supplied credentials, please ensure that they have not expired. If your app normally uses 2-Step Verification (e.g. SMS verification), biometrics (e.g. a fingerprint or face scan) or a location-dependent password (e.g. geo-gate), please provide valid demo credentials that we can use instead.
My question is how to provide an account for Play Store to review my app? or is there any demo account for Telegram to check? Thanks
...ANSWER
Answered 2022-Jan-31 at 07:07I recently faced a similar problem and here is my solution.
- First of all, I found this documentation. Here you can find these test phone numbers/accounts which you can use.
- In the BuildVars file, I've set both DEBUG_VERSION and DEBUG_PRIVATE_VERSION to "true".
- Deploy an app and check how it works with Test Accounts. Don't forget: It's very necessary to tick the "Test Backend" checkbox, otherwise, Telegram Test Accounts will not work!
- I turned on a "Managed publishing" in the Google Play Console (it allows you to send a Bundle to review and manually send an app to production after it if needed).
- I described how exactly the Google Play Team should use these accounts to check my app in App Content -> App access in Google Play Console.
- After I passed the review, I built another Bundle, in which I've set both DEBUG_VERSION and DEBUG_PRIVATE_VERSION back to "false" and sent this bundle to the review again (this version will go to Production)
QUESTION
i have the Invariant Violation: Native module cannot be null error and the 2nd error down below. I found online the issue might have to do with not having an ios folder in a module directory, i looked in each of the folders in the local system and on github with them all containing the ios folder
...ANSWER
Answered 2022-Jan-20 at 05:12Check the library @react-navigation/drawer
compatibility with IOS and Android respectively , link it manually sometimes autolinking doesn't work. Ensure you are running correct project , clean build and install pod and check it out.
QUESTION
The react native library for biometrics generates a base 64 signature that I want to verify with the public key RSA 2048 stored in the database as plain text (generated by the library as well) to authentificate the user with the correct public key. Following Topaco's comment I noticed that the public key and signature are returned from the library as a single line string with no padding.
...ANSWER
Answered 2022-Jan-14 at 09:11The problem was that I had a snippet of code that I had forgotten about that called the function that generates a new keys pair before the authentification(when I check if the device supports biometrics or not) so I was verifying a signature generated by the new key with the old key saved in the database. Thanks @Topaco and @President James K. Polk for confirming the inconsistency between the signature and public key
QUESTION
I have an app which generates couple of private keys. When user needs to sign data, they have to authenticate with biometrics and Secure Enclave signs it with the proper private key. Simple.
I got a new requirement - the app needs to be able to sign multiple pieces of data as they arrive in the device and user should authenticate only when signing the first piece.
So my questions are:
Is possible to create a private key that stays unlocked for certain amount of time after user authenticates with biometrics? If so, how?
Is possible to create a private key that stays unlocked until program tells Secure Enclave to lock it? If so, how?
I searched documentation and stack overflow thoroughly, but without any luck. Any help is much appreciated!
...ANSWER
Answered 2021-Dec-23 at 09:22Alright, so after a lot of testing I found the answer to my questions. Normally (in my case), user needs to authenticate each time the private key is used.
In order to be able to do batch operations, we need to use LAContext
and set reuse duration:
QUESTION
I am creating a mask_detection model on 3 classes "CorrectMask", "UncorrectMask", "NoMask". I am creating my CNN, but I have the following error:
...ANSWER
Answered 2021-Nov-28 at 11:08Change your fit function call to explicitly set the epoch parameter:
QUESTION
I want fetch some state from my store in one of the utils functions that I have. I know that I can do something like that:
...ANSWER
Answered 2021-Dec-13 at 15:22The first problem is the use of : Store
. Your code is telling TS "this is a generic store instance without any details about the state". Don't do that :) Instead you should follow our recommended TS setup guidelines, by inferring the type of the store and its state from the created instance:
QUESTION
I need to develop an Android app that has MFA authentication.
To log in, the user needs to first insert his username & password and then, biometric data (fingerprint, face, or iris) to confirm his identity.
I want to use something like Cognito to store the biometrics login but honestly, I can't really understand how I would do this.
Is this doable?
And if so, how?
...ANSWER
Answered 2021-Dec-01 at 09:52The simple answer - you can't.
You can't pass biometric data that is being collected by the Android system(or iOs system), outside the phone.
Neither face/iris nor fingerprint can be decoded in some readable format and sent to the third-party service.
This is how the android system works. As far as I know, iOs works the same - you cannot retrieve this data. Moreover, you cannot change this behaviour of the system(only in a very custom Android ROM, I suppose, and it will be quite hard to achieve)
You can use fingerprint/iris/face unlock in your application though - you won't be sending anything to your servers, but you will be able to unlock the UI of your app - this is kinda general usecase as for now.
Well if being completely true - you can send something to the server - you can generate a secret key and encrypt it based on the biometric data and with the biometric auth you can decrypt it and send wherever you want. The secret wont represent an actual biometric info but it is something...(cognito supports custom auth flows - maybe you even be able to utilize this approach somehow)
Long story short - here is an official documentation about the biometric auth and biometric based encryption.
Here is a codelab example.
Here is a general schematics of how it all works.
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Install biometrics
You can use biometrics like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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