From ba581e30daba1b3cdffdfbd9e85c1444fde08041 Mon Sep 17 00:00:00 2001
From: Robert Mathew <robert.c.mathew@gmail.com>
Date: Fri, 23 Aug 2024 18:37:10 +0530
Subject: [PATCH] feat: added KmsService and local KMS module

---
 modules/local-kms/build.gradle.kts            | 23 +++++++++++++
 modules/local-kms/src/main/kotlin/Main.kt     |  5 +++
 .../sphereon/oid/fed/services/KmsService.kt   | 32 +++++++++++++++++++
 settings.gradle.kts                           |  1 +
 4 files changed, 61 insertions(+)
 create mode 100644 modules/local-kms/build.gradle.kts
 create mode 100644 modules/local-kms/src/main/kotlin/Main.kt
 create mode 100644 modules/services/src/commonMain/kotlin/com/sphereon/oid/fed/services/KmsService.kt

diff --git a/modules/local-kms/build.gradle.kts b/modules/local-kms/build.gradle.kts
new file mode 100644
index 00000000..b1919cfd
--- /dev/null
+++ b/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)
+}
\ No newline at end of file
diff --git a/modules/local-kms/src/main/kotlin/Main.kt b/modules/local-kms/src/main/kotlin/Main.kt
new file mode 100644
index 00000000..d75aa9fd
--- /dev/null
+++ b/modules/local-kms/src/main/kotlin/Main.kt
@@ -0,0 +1,5 @@
+package com.sphereon.oid.fed.kms.local
+
+fun main() {
+    println("Hello World!")
+}
\ No newline at end of file
diff --git a/modules/services/src/commonMain/kotlin/com/sphereon/oid/fed/services/KmsService.kt b/modules/services/src/commonMain/kotlin/com/sphereon/oid/fed/services/KmsService.kt
new file mode 100644
index 00000000..8dc53cda
--- /dev/null
+++ b/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
+}
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
index bff086b8..90d48f4c 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -48,3 +48,4 @@ include(":modules:federation-server")
 include(":modules:openapi")
 include(":modules:persistence")
 include(":modules:services")
+include("modules:local-kms")