Unresolved reference: MasterKey

Question

I am trying to follow examples given here: https://developer.android.com/topic/security/data

I have included the required libraries in my gradle:

implementation "androidx.security:security-crypto:1.0.0"

// For Identity Credential APIs
implementation "androidx.security:security-identity-credential:1.0.0-alpha02"

And yet when I try to use the code:

val mainKey = MasterKey.Builder(applicationContext)
    .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
    .build()

I get unresolved reference: MasterKey error. Does the library have that class at all?

Thanks in advance.

Answer 1

Upgrade the library to latest version (1.1.0-alpha03 at the time of this writing)

implementation "androidx.security:security-crypto:1.1.0-alpha03"

From the release note, MasterKey is added on Version 1.1.0-alpha01.

Version 1.1.0-alpha01
...
New MasterKey class provides more options for keys, also deprecating MasterKeys to support new features and versions of Android that do not have KeyGenParamSpec.