WIP: Add ktx library module

build.gradle

@@ -12,6 +12,8 @@ buildscript {
         junit     : '4.12',
         mockito   : '2.28.2',
         rxjava    : '2.2.12',
+        kotlin    : '1.4.32',
+        coroutines: '1.4.3'
     ]
 
     repositories {
@@ -20,8 +22,9 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.2'
+        classpath 'com.android.tools.build:gradle:4.2.0'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
+        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.32'
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-all.zip

ktx/.gitignore

@@ -0,0 +1 @@
+/build

ktx/bintray.gradle

@@ -0,0 +1,51 @@
+apply plugin: 'maven-publish'
+apply plugin: 'com.jfrog.bintray'
+
+publishing {
+    publications {
+        Publication(MavenPublication) {
+            artifact("$buildDir/outputs/aar/ktx-release.aar")
+            groupId 'co.infinum'
+            artifact sourcesJar
+            artifact javadocsJar
+            artifactId 'goldfinger-ktx'
+            version versions.goldfinger
+
+            pom.withXml {
+                def root = asNode()
+                def dependenciesNode = root.appendNode('dependencies')
+
+                configurations.implementation.allDependencies.each {
+                    def dependencyNode = dependenciesNode.appendNode('dependency')
+                    if (it.name == 'core') {
+                        dependencyNode.appendNode('groupId', 'co.infinum')
+                        dependencyNode.appendNode('artifactId', 'goldfinger')
+                        dependencyNode.appendNode('version', versions.goldfinger)
+                    } else {
+                        dependencyNode.appendNode('groupId', it.group)
+                        dependencyNode.appendNode('artifactId', it.name)
+                        dependencyNode.appendNode('version', it.version)
+                    }
+                }
+            }
+        }
+    }
+}
+
+bintray {
+    user = System.getenv('BINTRAY_USER')
+    key = System.getenv('BINTRAY_API_KEY')
+    publish = false
+    publications = ['Publication']
+
+    pkg {
+        repo = 'android'
+        name = 'goldfinger-ktx'
+        userOrg = 'infinum'
+        publicDownloadNumbers = true
+
+        version {
+            name = versions.goldfinger
+        }
+    }
+}

ktx/build.gradle

@@ -0,0 +1,24 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion sdk.target
+
+    defaultConfig {
+        minSdkVersion sdk.min
+        targetSdkVersion sdk.target
+        versionName versions.goldfinger
+    }
+}
+
+dependencies {
+    implementation project(':core')
+    implementation "androidx.appcompat:appcompat:${versions.appcompat}"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:${versions.kotlin}"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:${versions.coroutines}"
+
+    testImplementation "junit:junit:${versions.junit}"
+    testImplementation "org.mockito:mockito-core:${versions.mockito}"
+}
+
+apply from: '../tasks.gradle'
+apply from: 'bintray.gradle'

ktx/src/main/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    package="co.infinum.goldfinger.ktx">
+
+    <uses-permission android:name="android.permission.USE_BIOMETRIC"/>
+
+</manifest>

ktx/src/main/java/co/infinum/goldfinger/ktx/GoldfingerKtx.kt

@@ -0,0 +1,75 @@
+package co.infinum.goldfinger.ktx
+
+import android.content.Context
+import co.infinum.goldfinger.Goldfinger
+import co.infinum.goldfinger.Goldfinger.PromptParams
+import co.infinum.goldfinger.crypto.CipherCrypter
+import co.infinum.goldfinger.crypto.CipherFactory
+import co.infinum.goldfinger.crypto.MacCrypter
+import co.infinum.goldfinger.crypto.MacFactory
+import co.infinum.goldfinger.crypto.SignatureCrypter
+import co.infinum.goldfinger.crypto.SignatureFactory
+import kotlinx.coroutines.flow.Flow
+
+interface GoldfingerKtx {
+
+    fun hasFingerprintHardware(): Boolean
+
+    fun hasEnrolledFingerprint(): Boolean
+
+    fun canAuthenticate(): Boolean
+
+    suspend fun authenticate(
+        params: PromptParams,
+    ): Flow<Goldfinger.Result>
+
+    suspend fun encrypt(
+        params: PromptParams,
+        key: String,
+        value: String,
+    ): Flow<Goldfinger.Result>
+
+    suspend fun decrypt(
+        params: PromptParams,
+        key: String,
+        value: String,
+    ): Flow<Goldfinger.Result>
+
+    fun cancel()
+
+    class Builder(private val context: Context) {
+
+        private val baseBuilder: Goldfinger.Builder = Goldfinger.Builder(context)
+
+        fun build(): GoldfingerKtx =
+            GoldfingerKtxImpl(baseBuilder.build())
+
+        fun cipherCrypter(cipherCrypter: CipherCrypter?): Builder = apply {
+            baseBuilder.cipherCrypter(cipherCrypter)
+        }
+
+        fun cipherFactory(cipherFactory: CipherFactory?): Builder = apply {
+            baseBuilder.cipherFactory(cipherFactory)
+        }
+
+        fun logEnabled(logEnabled: Boolean): Builder = apply {
+            baseBuilder.logEnabled(logEnabled)
+        }
+
+        fun macCrypter(macCrypter: MacCrypter?): Builder = apply {
+            baseBuilder.macCrypter(macCrypter)
+        }
+
+        fun macFactory(macFactory: MacFactory?): Builder = apply {
+            baseBuilder.macFactory(macFactory)
+        }
+
+        fun signatureCrypter(signatureCrypter: SignatureCrypter?): Builder = apply {
+            baseBuilder.signatureCrypter(signatureCrypter)
+        }
+
+        fun signatureFactory(signatureFactory: SignatureFactory?): Builder = apply {
+            baseBuilder.signatureFactory(signatureFactory)
+        }
+    }
+}

ktx/src/main/java/co/infinum/goldfinger/ktx/GoldfingerKtxCallback.kt

@@ -0,0 +1,28 @@
+package co.infinum.goldfinger.ktx
+
+import co.infinum.goldfinger.Goldfinger
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.channels.ProducerScope
+
+@ExperimentalCoroutinesApi
+class GoldfingerKtxCallback(
+    private val goldfinger: Goldfinger,
+    private val producerScope: ProducerScope<Goldfinger.Result>,
+) : Goldfinger.Callback {
+    override fun onResult(result: Goldfinger.Result) {
+        with(producerScope) {
+            if (!isClosedForSend) {
+                channel.offer(result)
+                if (result.type() == Goldfinger.Type.SUCCESS || result.type() == Goldfinger.Type.ERROR) {
+                    channel.close()
+                }
+            } else {
+                goldfinger.cancel()
+            }
+        }
+    }
+
+    override fun onError(e: Exception) {
+        producerScope.channel.close(e)
+    }
+}

ktx/src/main/java/co/infinum/goldfinger/ktx/GoldfingerKtxImpl.kt

@@ -0,0 +1,72 @@
+package co.infinum.goldfinger.ktx
+
+import co.infinum.goldfinger.Goldfinger
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.buffer
+import kotlinx.coroutines.flow.callbackFlow
+import kotlinx.coroutines.flow.cancellable
+
+@ExperimentalCoroutinesApi
+class GoldfingerKtxImpl (private val goldfinger: Goldfinger) : GoldfingerKtx {
+
+    private fun inGoldfingerFlow(doWithCallback: (GoldfingerKtxCallback) -> Unit) =
+        callbackFlow {
+            doWithCallback(
+                GoldfingerKtxCallback(
+                    goldfinger,
+                    this,
+                )
+            )
+            awaitClose { goldfinger.cancel() }
+        }
+            .buffer(
+                onBufferOverflow = BufferOverflow.DROP_OLDEST,
+            )
+            .cancellable()
+
+    override fun hasFingerprintHardware(): Boolean = goldfinger.hasFingerprintHardware()
+
+    override fun hasEnrolledFingerprint(): Boolean = goldfinger.hasEnrolledFingerprint()
+
+    override fun canAuthenticate(): Boolean = goldfinger.canAuthenticate()
+
+    override suspend fun authenticate(params: Goldfinger.PromptParams): Flow<Goldfinger.Result> = inGoldfingerFlow { callback ->
+        goldfinger.authenticate(
+            params,
+            callback,
+        )
+    }
+
+    override suspend fun encrypt(
+        params: Goldfinger.PromptParams,
+        key: String,
+        value: String,
+    ): Flow<Goldfinger.Result> = inGoldfingerFlow { callback ->
+        goldfinger.encrypt(
+            params,
+            key,
+            value,
+            callback,
+        )
+    }
+
+    override suspend fun decrypt(
+        params: Goldfinger.PromptParams,
+        key: String,
+        value: String,
+    ): Flow<Goldfinger.Result> = inGoldfingerFlow { callback ->
+        goldfinger.decrypt(
+            params,
+            key,
+            value,
+            callback,
+        )
+    }
+
+    override fun cancel() {
+        goldfinger.cancel()
+    }
+}

settings.gradle

@@ -1 +1 @@
-include ':core', ':example', ':rx'
+include ':core', ':example', ':rx', ':ktx'