Added authentication with custom credential provider and removed authentication with API key

.github/workflows/test-android.yml

@@ -0,0 +1,29 @@
+name: Run Unit Tests for Android
+on:
+  workflow_dispatch:
+  pull_request:
+    branches: [ main ]
+jobs:
+  test-android:
+    name: Test Android
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Java
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: '17'
+
+      - name: Run Unit Tests
+        run: |
+          ./gradlew testDebugUnitTest
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v2
+        if: always()
+        with:
+          name: test-results
+          path: library/build/reports/tests/testDebugUnitTest/
+          retention-days: 1

README.md

@@ -1,17 +1,17 @@
 # Amazon Location Service Mobile Authentication SDK for Android
 
-These utilities help you authenticate when making [Amazon Location Service](https://aws.amazon.com/location/) API calls from your Android applications. This specifically helps when using [Amazon Cognito](https://docs.aws.amazon.com/location/latest/developerguide/authenticating-using-cognito.html) or [API keys](https://docs.aws.amazon.com/location/latest/developerguide/using-apikeys.html) as the authentication method.
+These utilities help you authenticate when making [Amazon Location Service](https://aws.amazon.com/location/) API calls from your Android applications. This specifically helps when using [Amazon Cognito](https://docs.aws.amazon.com/location/latest/developerguide/authenticating-using-cognito.html) as the authentication method.
 
 ## Installation
 
-This authentication SDK works with the overall AWS SDK. Both SDKs are published to Maven Central.
+This authentication SDK works with the overall AWS Kotlin SDK. Both SDKs are published to Maven Central.
 Check the [latest version](https://mvnrepository.com/artifact/software.amazon.location/auth) of auth
 SDK on Maven Central.
 
 Add the following lines to the dependencies section of your build.gradle file in Android Studio:
 
 ```
-implementation("software.amazon.location:auth:0.0.2")
+implementation("software.amazon.location:auth:0.2.4")
 implementation("aws.sdk.kotlin:location:1.2.21")
 implementation("org.maplibre.gl:android-sdk:11.0.0-pre5")
 implementation("com.squareup.okhttp3:okhttp:4.12.0")
@@ -34,19 +34,19 @@ import okhttp3.OkHttpClient
 You can create an AuthHelper and use it with the AWS Kotlin SDK:
 
 ```
-// Create an authentication helper instance using an Amazon Location API Key
-private fun exampleAPIKeyLogin() {
+// Create a credentail provider using Identity Pool Id with AuthHelper
+private fun exampleCognitoLogin() {
     var authHelper = AuthHelper(applicationContext)
-    var locationCredentialsProvider : LocationCredentialsProvider = authHelper.authenticateWithApiKey("My-Amazon-Location-API-Key")
+    var locationCredentialsProvider : LocationCredentialsProvider = authHelper.authenticateWithCognitoIdentityPool("My-Cognito-Identity-Pool-Id")
     var locationClient = locationCredentialsProvider?.getLocationClient()
 }
-```
 
-```
-// Create an authentication helper using credentials from Cognito
-private fun exampleCognitoLogin() {
+OR
+
+// Create a credentail provider using custom credential provider with AuthHelper
+private fun exampleCustomCredentialLogin() {
     var authHelper = AuthHelper(applicationContext)
-    var locationCredentialsProvider : LocationCredentialsProvider = authHelper.authenticateWithCognitoIdentityPool("My-Cognito-Identity-Pool-Id")
+    var locationCredentialsProvider : LocationCredentialsProvider = authHelper.authenticateWithCredentialsProvider("MY-AWS-REGION", "MY-CUSTOM-CREDENTIAL-PROVIDER")
     var locationClient = locationCredentialsProvider?.getLocationClient()
 }
 ```
@@ -58,7 +58,7 @@ HttpRequestUtil.setOkHttpClient(
         .addInterceptor(
             AwsSignerInterceptor(
                 "geo",
-                "My-aws-region",
+                "MY-AWS-REGION",
                 locationCredentialsProvider
             )
         )

library/src/main/java/software/amazon/location/auth/AuthHelper.kt

@@ -1,6 +1,7 @@
 package software.amazon.location.auth
 
 import android.content.Context
+import aws.smithy.kotlin.runtime.auth.awscredentials.CredentialsProvider
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import software.amazon.location.auth.utils.AwsRegions
@@ -73,14 +74,48 @@ class AuthHelper(private val context: Context) {
     }
 
     /**
-     * Authenticates using an API key.
-     * @param apiKey The API key for authentication.
-     * @return A LocationCredentialsProvider instance.
+     * Authenticates using a region and a specified CredentialsProvider.
+     *
+     * For example, to get credentials from AWS Kotlin SDK:
+     * 1. Use `CognitoIdentityClient` to call `.getId` to get the identity ID:
+     *    ``` kotlin
+     *    val identityId = cognitoIdentityClient.getId(GetIdRequest { this.identityPoolId = identityPoolId }).identityId
+     *    ```
+     *
+     * 2. Use `CognitoIdentityClient` to call `.getCredentialsForIdentity` with the identity ID to get the credentials:
+     *    ``` kotlin
+     *    val credentials = cognitoIdentityClient.getCredentialsForIdentity(GetCredentialsForIdentityRequest { this.identityId = identityId }).credentials
+     *    ```
+     *
+     *
+     * To create a `StaticCredentialsProvider` as a `CredentialsProvider` from the obtained credentials:
+     * 1. Use the credentials obtained in the previous steps:
+     *    ``` kotlin
+     *    val staticCredentialsProvider = StaticCredentialsProvider(
+     *          aws.smithy.kotlin.runtime.auth.awscredentials.Credentials.invoke(
+     *                 accessKeyId = credentials.accessKeyId,
+     *                 secretAccessKey = credentials.secretKey,
+     *                 sessionToken = credentials.sessionToken,
+     *                 expiration = credentials.expiration
+     *          )
+     *    )
+     *    ```
+     *
+     * @param region The AWS region as a string.
+     * @param credentialsProvider The `CredentialsProvider` from AWS Kotlin SDK (`aws.smithy.kotlin.runtime.auth.awscredentials`).
+     * @return A `LocationCredentialsProvider` object.
      */
-    fun authenticateWithApiKey(
-        apiKey: String,
-    ): LocationCredentialsProvider = LocationCredentialsProvider(
-        context,
-        apiKey,
-    )
+    suspend fun authenticateWithCredentialsProvider(
+        region: String,
+        credentialsProvider: CredentialsProvider
+    ): LocationCredentialsProvider {
+        return withContext(Dispatchers.IO) {
+            val locationCredentialsProvider = LocationCredentialsProvider(
+                context,
+                AwsRegions.fromName(region),
+            )
+            locationCredentialsProvider.initializeLocationClient(credentialsProvider)
+            locationCredentialsProvider
+        }
+    }
 }