added missing jwk

Signed-off-by: mineme0110 <shailesh.patil@iohk.io>

shared/crypto/src/main/scala/org/hyperledger/identus/shared/crypto/jwk/JWK.scala

@@ -0,0 +1,61 @@
+package org.hyperledger.identus.shared.crypto.jwk
+
+import com.nimbusds.jose.jwk.Curve
+import com.nimbusds.jose.jwk.OctetKeyPair
+import com.nimbusds.jose.util.Base64URL
+import org.hyperledger.identus.shared.crypto.*
+import zio.json.*
+import zio.json.ast.Json
+
+import scala.language.implicitConversions
+import scala.util.Try
+
+opaque type JWK = Json
+
+object JWK {
+  def fromString(json: String): Either[String, JWK] = json.fromJson[Json]
+  extension (jwk: JWK) {
+    def toJsonString: String = jwk.toJson
+    def toJsonAst: Json = jwk
+  }
+
+  given Conversion[Ed25519KeyPair, JWK] = keyPair => {
+    val x = Base64URL.encode(keyPair.publicKey.getEncoded)
+    val d = Base64URL.encode(keyPair.privateKey.getEncoded)
+    val octetKey = OctetKeyPair.Builder(Curve.Ed25519, x).d(d).build()
+    octetKey.toJSONString().fromJson[Json].toOption.get // .get cannot fail
+  }
+
+  given Conversion[X25519KeyPair, JWK] = keyPair => {
+    val x = Base64URL.encode(keyPair.publicKey.getEncoded)
+    val d = Base64URL.encode(keyPair.privateKey.getEncoded)
+    val octetKey = OctetKeyPair.Builder(Curve.X25519, x).d(d).build()
+    octetKey.toJSONString().fromJson[Json].toOption.get // .get cannot fail
+  }
+}
+
+trait FromJWK[K] {
+  def from(jwk: JWK): Either[String, K]
+}
+
+object FromJWK {
+  given FromJWK[Ed25519KeyPair] = jwk => {
+    val keyPair = for {
+      okp <- Try(OctetKeyPair.parse(jwk.toJsonString))
+      d <- Try(okp.getD().decode())
+      privateKey <- Apollo.default.ed25519.privateKeyFromEncoded(d)
+      publicKey = privateKey.toPublicKey
+    } yield Ed25519KeyPair(publicKey, privateKey)
+    keyPair.toEither.left.map(_.getMessage())
+  }
+
+  given FromJWK[X25519KeyPair] = jwk => {
+    val keyPair = for {
+      okp <- Try(OctetKeyPair.parse(jwk.toJsonString))
+      d <- Try(okp.getD().decode())
+      privateKey <- Apollo.default.x25519.privateKeyFromEncoded(d)
+      publicKey = privateKey.toPublicKey
+    } yield X25519KeyPair(publicKey, privateKey)
+    keyPair.toEither.left.map(_.getMessage())
+  }
+}