How to enable post quantum media encryption in 5.2+ version?

[Android-23]

Hello,

As per the below link, https://wiki.linphone.org/xwiki/wiki/public/view/Lib/Features/Post%20Quantum%20media%20encryption/

PQC encryption is available from the 5.2+ version but we need to enable it by CMake.

Do you have any detailed steps to enable PQC encryption in android applications?

[Viish]

Hi,

You simply have to set which algo to use for Post Quantum. In linphone-android we decided to use Kyber 512: https://gitlab.linphone.org/BC/public/linphone-android/-/commit/95de49be304fe82c0a8bd675586787e47c32bdf0

Cheers,

[Android-23]

Hi, Thanks for your reply. Even after doing the mentioned steps, linphone_core_get_post_quantum_available(); is returning false. Anything else is required to be done?

[Viish]

Then it means you either didn't build our SDK using -DENABLE_PQCRYPTO=ON or you didn't use that SDK for your app build, see https://gitlab.linphone.org/BC/public/linphone-android#building-a-local-sdk

[Android-23]

Hi, I followed the steps mentioned in the above link and I am able to generate a linphone native SDK build with PQC on Mac OS. Then I pointed this SDK build path in Linphone Android Project and it worked properly.

Now I have copied this generated SDK build folder to a Windows machine and tried to point the same Linphone Android Project with this build (in windows machine) folder but getting PQC disabled.

Any clue?

[Viish]

That means your setup on the windows machine isn't right, probably the path to the local maven repository or the gradle.properties not overriding LinphoneSdkBuildDir variable.

If you want to be sure to use a locally built AAR, then comment out the online repository: https://gitlab.linphone.org/BC/public/linphone-android/-/blob/master/settings.gradle#L16

[Android-23]

Hi,

Now PQC is enabled in linphone application and I can able to set the Post Quantum ZRTP option in the call setting.

But after setting that media encryption it is not working. I am getting media encryption value from current call params as NONE instead of ZRTP.

[Viish]

Please attach logs from both sides.

[Android-23]

Hi, Now it is working fine.

Thanks.

[Android-23]

Hi,

We have a small query for iOS as well.

We have prepared SDK build for iOS with PQC enabled.

But we are not able to find any method(shown in the below screenshot) to set PQC algorithm.

Could you please help me out, using which method we can configure PQC in iOS?

Thanks in advance!

[Viish]

As for Android you can use the RC config file. To do it in code, the llinphone_core_set_zrtp_agreement_suites() can be called using Objective-C, or in Swift using core.setZrtpKeyAgreementSuites().

[Android-23]

Okay. But our issue is, we are not able to find core.setZrtpKeyAgreementSuites() in iOS.

[Viish]

Then check the version you are using/building, as both our Java & Swift wrappers are generating the same methods for a given SDK version.

[Viish]

Actually there might be an issue in our Swift wrapper concerning this method, I'll check.

[Android-23]

Okay, Thank you.

[Android-23]

Hi, Can I have an update on the Swift wrapper issue?

[Viish]

Hi,

It hasn't been fixed yet.