feat: added KmsService and local KMS module

modules/local-kms/build.gradle.kts

@@ -0,0 +1,23 @@
+plugins {
+    kotlin("jvm") version "2.0.0"
+}
+
+group = "com.sphereon.oid.fed.kms.local"
+version = "0.1.0"
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+    google()
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+kotlin {
+    jvmToolchain(21)
+}

modules/local-kms/src/main/kotlin/Main.kt

@@ -0,0 +1,5 @@
+package com.sphereon.oid.fed.kms.local
+
+fun main() {
+    println("Hello World!")
+}

modules/services/src/commonMain/kotlin/com/sphereon/oid/fed/services/KmsService.kt

@@ -0,0 +1,32 @@
+package com.sphereon.oid.fed.services
+
+import com.sphereon.oid.fed.persistence.models.Jwk
+
+class KmsService(private val provider: String) {
+
+    private val kmsClient: KmsClient by lazy {
+        when (provider) {
+            //"local" -> LocalKmsClient()
+            //"aws" -> AwsKmsClient()
+            else -> throw IllegalArgumentException("Unsupported KMS provider: $provider")
+        }
+    }
+
+    fun generateKeyPair(keyId: String): Jwk {
+        return kmsClient.generateKeyPair(keyId)
+    }
+
+    fun sign(data: String, keyId: String): String {
+        return kmsClient.sign(data, keyId)
+    }
+
+    fun verify(token: String, keyId: String): Boolean {
+        return kmsClient.verify(token, keyId)
+    }
+}
+
+interface KmsClient {
+    fun generateKeyPair(keyId: String): Jwk
+    fun sign(data: String, keyId: String): String
+    fun verify(token: String, keyId: String): Boolean
+}

settings.gradle.kts

@@ -48,3 +48,4 @@ include(":modules:federation-server")
 include(":modules:openapi")
 include(":modules:persistence")
 include(":modules:services")
+include("modules:local-kms")