1+ package com.sap.cdc.bitsnbytes.cdc
2+
3+ import android.annotation.SuppressLint
4+ import androidx.activity.ComponentActivity
5+ import androidx.credentials.CreateCredentialResponse
6+ import androidx.credentials.CreatePublicKeyCredentialRequest
7+ import androidx.credentials.CreatePublicKeyCredentialResponse
8+ import androidx.credentials.CredentialManager
9+ import androidx.credentials.GetCredentialRequest
10+ import androidx.credentials.GetCredentialResponse
11+ import androidx.credentials.GetPublicKeyCredentialOption
12+ import androidx.credentials.PublicKeyCredential
13+ import com.sap.cdc.android.sdk.CDCDebuggable
14+ import com.sap.cdc.android.sdk.auth.provider.IPasskeysAuthenticationProvider
15+ import java.lang.ref.WeakReference
16+
17+ class PasskeysAuthenticationProvider (
18+ private val weakActivity : WeakReference <ComponentActivity >? = null
19+ ) : IPasskeysAuthenticationProvider {
20+
21+ companion object {
22+
23+ const val LOG_TAG = " PasskeysAuthenticationProvider"
24+ }
25+
26+ private val credentialManager by lazy(LazyThreadSafetyMode .PUBLICATION ) {
27+ weakActivity?.get()?.let {
28+ CredentialManager .create(it)
29+ }
30+ }
31+
32+ @SuppressLint(" PublicKeyCredential"
33+ override suspend fun createPasskey (requestJson : String ): String? {
34+ if (weakActivity?.get() == null ) {
35+ return null
36+ }
37+ try {
38+ val createPublicKeyCredentialRequest = CreatePublicKeyCredentialRequest (
39+ // Contains the request in JSON format. Uses the standard WebAuthn
40+ // web JSON spec.
41+ requestJson = requestJson,
42+ // Defines whether you prefer to use only immediately available credentials,
43+ // not hybrid credentials, to fulfill this request. This value is false
44+ // by default.
45+ preferImmediatelyAvailableCredentials = false ,
46+ )
47+ // Use the createCredential method to create the passkey.
48+ val result: CreateCredentialResponse ? = credentialManager?.createCredential(
49+ request = createPublicKeyCredentialRequest,
50+ context = weakActivity.get()!! ,
51+ )
52+ return if (result is CreatePublicKeyCredentialResponse ) {
53+ result.registrationResponseJson
54+ } else {
55+ null
56+ }
57+ } catch (e: Exception ) {
58+ CDCDebuggable .log(LOG_TAG , e.message ? : " Error creating passkey"
59+ return null
60+ }
61+ }
62+
63+ override suspend fun getPasskey (requestJson : String ): String? {
64+ if (weakActivity?.get() == null ) {
65+ return null
66+ }
67+ try {
68+ // Get passkeys from the user's public key credential provider.
69+ val getPublicKeyCredentialOption = GetPublicKeyCredentialOption (
70+ requestJson = requestJson,
71+ )
72+
73+ val getCredRequest = GetCredentialRequest (
74+ listOf (getPublicKeyCredentialOption)
75+ )
76+
77+ val result: GetCredentialResponse ? = credentialManager?.getCredential(
78+ // Use an activity-based context to avoid undefined system UI
79+ // launching behavior.
80+ context = weakActivity.get()!! ,
81+ request = getCredRequest
82+ )
83+
84+ val credential = result?.credential
85+ return if (credential is PublicKeyCredential ) {
86+ credential.authenticationResponseJson
87+ } else {
88+ null
89+ }
90+ } catch (e: Exception ) {
91+ CDCDebuggable .log(LOG_TAG , e.message ? : " Error getting passkey"
92+ return null
93+ }
94+ }
95+
96+ }
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