Initial OID4VCI integration (#41)

This starts integrating the OID4VCI flow into the wallet.

MobileSdk/build.gradle.kts

@@ -120,7 +120,7 @@ android {
 }
 
 dependencies {
-  api("com.spruceid.mobile.sdk.rs:mobilesdkrs:0.0.32")
+  api("com.spruceid.mobile.sdk.rs:mobilesdkrs:0.0.36")
   //noinspection GradleCompatible
   implementation("com.android.support:appcompat-v7:28.0.0")
   /* Begin UI dependencies */

example/build.gradle.kts

@@ -70,6 +70,8 @@ dependencies {
     implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.4")
     implementation(project(mapOf("path" to ":MobileSdk")))
     implementation("com.google.zxing:core:3.5.1")
+    implementation("io.ktor:ktor-client-core:2.3.12")
+    implementation("io.ktor:ktor-client-cio:2.3.12")
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")

example/src/main/java/com/spruceid/mobilesdkexample/navigation/Screen.kt

@@ -8,6 +8,8 @@ const val VERIFIER_SETTINGS_HOME_PATH = "verifier_settings_home"
 const val WALLET_SETTINGS_HOME_PATH = "wallet_settings_home"
 const val ADD_TO_WALLET_PATH = "add_to_wallet/{rawCredential}"
 const val OID4VP_PATH = "oid4vp/{params}"
+const val OID4VCI_PATH = "oid4vci"
+
 
 
 sealed class Screen(val route: String) {
@@ -19,4 +21,5 @@ sealed class Screen(val route: String) {
     object WalletSettingsHomeScreen : Screen(WALLET_SETTINGS_HOME_PATH)
     object AddToWalletScreen : Screen(ADD_TO_WALLET_PATH)
     object ScanQRScreen : Screen(OID4VP_PATH)
+    object OID4VCIScreen : Screen(OID4VCI_PATH)
 }

example/src/main/java/com/spruceid/mobilesdkexample/navigation/SetupNavGraph.kt

@@ -13,6 +13,7 @@ import com.spruceid.mobilesdkexample.verifier.VerifyVCView
 import com.spruceid.mobilesdkexample.verifiersettings.VerifierSettingsHomeView
 import com.spruceid.mobilesdkexample.viewmodels.IRawCredentialsViewModel
 import com.spruceid.mobilesdkexample.wallet.AddToWalletView
+import com.spruceid.mobilesdkexample.wallet.OID4VCIView
 import com.spruceid.mobilesdkexample.walletsettings.WalletSettingsHomeView
 import com.spruceid.mobilesdkexample.wallet.DispatchQRView
 
@@ -76,5 +77,10 @@ fun SetupNavGraph(
         ) {
             DispatchQRView(navController)
         }
+        composable(
+            route = Screen.OID4VCIScreen.route,
+        ) {
+            OID4VCIView(navController)
+        }
     }
 }

example/src/main/java/com/spruceid/mobilesdkexample/wallet/OID4VCI.kt

@@ -0,0 +1,236 @@
+package com.spruceid.mobilesdkexample.wallet
+
+import android.content.Context
+import android.util.Base64
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.navigation.NavController
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.spruceid.mobile.sdk.KeyManager
+import com.spruceid.mobile.sdk.rs.AsyncHttpClient
+import com.spruceid.mobile.sdk.rs.DidMethod
+import com.spruceid.mobile.sdk.rs.HttpRequest
+import com.spruceid.mobile.sdk.rs.HttpResponse
+import com.spruceid.mobile.sdk.rs.Oid4vci
+import com.spruceid.mobile.sdk.rs.generatePopComplete
+import com.spruceid.mobile.sdk.rs.generatePopPrepare
+import com.spruceid.mobilesdkexample.R
+import com.spruceid.mobilesdkexample.ScanningComponent
+import com.spruceid.mobilesdkexample.ScanningType
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.request.request
+import io.ktor.client.request.setBody
+import io.ktor.client.statement.readBytes
+import io.ktor.http.HttpMethod
+import io.ktor.util.toMap
+import kotlinx.coroutines.*
+import kotlin.math.min
+
+@OptIn(ExperimentalMaterial3Api::class, ExperimentalPermissionsApi::class)
+@Composable
+fun OID4VCIView(
+    navController: NavController
+) {
+    var loading by remember {
+        mutableStateOf(false)
+    }
+    var err by remember {
+        mutableStateOf<String?>(null)
+    }
+    var credential by remember {
+        mutableStateOf<String?>(null)
+    }
+    val ctx = LocalContext.current
+
+    fun getCredential(credentialOffer: String) {
+        loading = true
+        val client = HttpClient(CIO)
+        val oid4vciSession = Oid4vci.newWithAsyncClient(client = object : AsyncHttpClient {
+            override suspend fun httpClient(request: HttpRequest): HttpResponse {
+                val res = client.request(request.url) {
+                    method = HttpMethod(request.method)
+                    for ((k, v) in request.headers) {
+                        headers[k] = v
+                    }
+                    setBody(request.body)
+                }
+
+                return HttpResponse(
+                    statusCode = res.status.value.toUShort(),
+                    headers = res.headers.toMap().mapValues { it.value.joinToString() },
+                    body = res.readBytes()
+                )
+            }
+
+        })
+
+        GlobalScope.async {
+            try {
+                oid4vciSession.initiateWithOffer(
+                    credentialOffer = credentialOffer,
+                    clientId = "skit-demo-wallet",
+                    redirectUrl = "https://spruceid.com"
+                )
+
+                val nonce = oid4vciSession.exchangeToken()
+
+                val metadata = oid4vciSession.getMetadata()
+
+                val keyManager = KeyManager()
+                keyManager.generateSigningKey(id = "reference-app/default-signing")
+                val jwk = keyManager.getJwk(id = "reference-app/default-signing")
+
+                val signingInput = jwk?.let {
+                    generatePopPrepare(
+                        audience = metadata.issuer(),
+                        nonce = nonce,
+                        didMethod = DidMethod.JWK,
+                        publicJwk = jwk,
+                        durationInSecs = null
+                    )
+                }
+
+                val signature = signingInput?.let {
+                    keyManager.signPayload(
+                        id = "reference-app/default-signing",
+                        payload = signingInput
+                    )
+                }
+
+                val pop = signingInput?.let {
+                    signature?.let {
+                        generatePopComplete(
+                            signingInput = signingInput,
+                            signature = Base64.encodeToString(
+                                signature,
+                                Base64.URL_SAFE
+                                        or Base64.NO_PADDING
+                                        or Base64.NO_WRAP
+                            ).toByteArray()
+                        )
+                    }
+                }
+
+                oid4vciSession.setContextMap(getVCPlaygroundOID4VCIContext(ctx = ctx))
+
+                val credentials = pop?.let {
+                    oid4vciSession.exchangeCredential(proofsOfPossession = listOf(pop))
+                }
+
+                credentials?.forEach { cred ->
+                    cred.payload.toString(Charsets.UTF_8).let {
+                        credential = it.substring(0, min(1500, it.length))
+                        // TODO: add to credentialPack
+                    }
+
+                }
+            } catch (e: Exception) {
+                err = e.localizedMessage
+                e.printStackTrace()
+            }
+            loading = false
+        }
+    }
+
+    if (loading) {
+        Column(
+            modifier = Modifier.fillMaxSize(),
+            verticalArrangement = Arrangement.Center,
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            Text("Loading...")
+        }
+    } else if (err != null) {
+        Column(
+            modifier = Modifier.fillMaxSize(),
+            verticalArrangement = Arrangement.Center,
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            Text(err!!)
+        }
+    } else if (credential == null) {
+        ScanningComponent(
+            title = "Scan to Add Credential",
+            navController = navController,
+            scanningType = ScanningType.QRCODE,
+            onRead = ::getCredential
+        )
+    } else {
+        Text(credential!!)
+    }
+}
+
+
+fun getVCPlaygroundOID4VCIContext(ctx: Context): Map<String, String> {
+    val context = mutableMapOf<String, String>()
+
+    context["https://contexts.vcplayground.org/examples/alumni/v1.json"] =
+        ctx.resources.openRawResource(R.raw.contexts_vcplayground_org_examples_alumni_v1)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://w3id.org/first-responder/v1"] =
+        ctx.resources.openRawResource(R.raw.w3id_org_first_responder_v1)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://w3id.org/vdl/aamva/v1"] =
+        ctx.resources.openRawResource(R.raw.w3id_org_vdl_aamva_v1)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://w3id.org/citizenship/v3"] =
+        ctx.resources.openRawResource(R.raw.w3id_org_citizenship_v3)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://contexts.vcplayground.org/examples/movie-ticket/v1.json"] =
+        ctx.resources.openRawResource(R.raw.contexts_vcplayground_org_examples_movie_ticket_v1)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://purl.imsglobal.org/spec/ob/v3p0/context-3.0.2.json"] =
+        ctx.resources.openRawResource(R.raw.purl_imsglobal_org_spec_ob_v3p0_context_3_0_2)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://contexts.vcplayground.org/examples/food-safety-certification/v1.json"] =
+        ctx.resources.openRawResource(R.raw.contexts_vcplayground_org_examples_food_safety_certification_v1)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://contexts.vcplayground.org/examples/gs1-8110-coupon/v2.json"] =
+        ctx.resources.openRawResource(R.raw.contexts_vcplayground_org_examples_gs1_8110_coupon_v2)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    context["https://contexts.vcplayground.org/examples/customer-loyalty/v1.json"] =
+        ctx.resources.openRawResource(R.raw.contexts_vcplayground_org_examples_customer_loyalty_v1)
+            .bufferedReader()
+            .readLines()
+            .joinToString("")
+
+    return context
+}
+
+

example/src/main/java/com/spruceid/mobilesdkexample/wallet/WalletHomeView.kt

@@ -39,6 +39,7 @@ import com.spruceid.mobilesdkexample.ui.theme.CTAButtonBlue
 import com.spruceid.mobilesdkexample.ui.theme.Inter
 import com.spruceid.mobilesdkexample.ui.theme.TextHeader
 import com.spruceid.mobilesdkexample.ui.theme.Primary
+import com.spruceid.mobilesdkexample.utils.mdocBase64
 import com.spruceid.mobilesdkexample.viewmodels.IRawCredentialsViewModel
 import kotlinx.coroutines.launch
 
@@ -71,6 +72,26 @@ fun WalletHomeHeader(navController: NavController) {
             color = TextHeader
         )
         Spacer(Modifier.weight(1f))
+        Box(
+            contentAlignment = Alignment.Center,
+            modifier = Modifier
+                .width(36.dp)
+                .height(36.dp)
+                .padding(start = 4.dp)
+                .clip(shape = RoundedCornerShape(8.dp))
+                .background(Primary)
+                .clickable {
+                    navController.navigate(Screen.OID4VCIScreen.route)
+                }
+        ) {
+            Image(
+                painter = painterResource(id = R.drawable.scan_qr_code),
+                contentDescription = stringResource(id = R.string.scan_qr_code),
+                modifier = Modifier
+                    .width(20.dp)
+                    .height(20.dp)
+            )
+        }
         Box(
             contentAlignment = Alignment.Center,
             modifier = Modifier

example/src/main/res/raw/contexts_vcplayground_org_examples_alumni_v1.json

@@ -0,0 +1,13 @@
+{
+  "@context": {
+    "@version": 1.1,
+    "@protected": true,
+    "name": "https://schema.org/name",
+    "description": "https://schema.org/description",
+    "identifier": "https://schema.org/identifier",
+    "image": {
+      "@id": "https://schema.org/image",
+      "@type": "@id"
+    }
+  }
+}

example/src/main/res/raw/contexts_vcplayground_org_examples_customer_loyalty_v1.json

@@ -0,0 +1,29 @@
+{
+  "@context": {
+    "@protected": true,
+    "id": "@id",
+    "type": "@type",
+    "CustomerLoyaltyCredential": "https://contexts.vcplayground.org/examples/customer-loyalty/vocab/#CustomerLoyaltyCredential",
+    "CustomerLoyaltyCard": {
+      "@id": "https://contexts.vcplayground.org/examples/customer-loyalty/vocab/#CustomerLoyaltyCard",
+      "@context": {
+        "@protected": true,
+        "id": "@id",
+        "type": "@type",
+        "identifier": "https://schema.org/identifier",
+        "branchCode": "https://schema.org/branchCode"
+      }
+    },
+    "customerLoyaltyCard": "https://contexts.vcplayground.org/examples/customer-loyalty/vocab/#customerLoyaltyCard",
+    "image": {
+      "@id": "https://schema.org/image",
+      "@type": "@id"
+    },
+    "url": {
+      "@id": "https://schema.org/url",
+      "@type": "@id"
+    },
+    "name": "https://schema.org/name",
+    "description": "https://schema.org/description"
+  }
+}

example/src/main/res/raw/contexts_vcplayground_org_examples_food_safety_certification_v1.json

@@ -0,0 +1,29 @@
+{
+  "@context": {
+    "@protected": true,
+    "id": "@id",
+    "type": "@type",
+    "FoodSafetyCertificationCredential": "https://contexts.vcplayground.org/examples/food-safety-certification/vocab#FoodSafetyCertificationCredential",
+
+    "name": "https://schema.org/name",
+    "description": "https://schema.org/description",
+    "image": "https://schema.org/image",
+    "certification": "https://contexts.vcplayground.org/examples/food-safety-certification/vocab#certification",
+
+    "FoodSafetyCertification": {
+      "@id": "https://contexts.vcplayground.org/examples/food-safety-certification/vocab#FoodSafetyCertification",
+      "@context": {
+        "@protected": true,
+        "id": "@id",
+        "type": "@type",
+
+        "certificateId": "https://contexts.vcplayground.org/examples/food-safety-certification/vocab#certificateId",
+        "examDate": {
+          "@id": "https://contexts.vcplayground.org/examples/food-safety-certification/vocab#examDate",
+          "@type": "http://www.w3.org/2001/XMLSchema#dateTime"
+        },
+        "testCode": "https://contexts.vcplayground.org/examples/food-safety-certification/vocab#testCode"
+      }
+    }
+  }
+}