Moved key conversion to utils struct for iOS

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "slauth"
-version = "0.7.17"
+version = "0.7.18"
 authors = [
     "richer <richer.arc@gmail.com>",
     "LucFauvel <luc.fauvel@hotmail.com>",

Slauth.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'Slauth'
-  s.version          = '0.7.17'
+  s.version          = '0.7.18'
   s.summary          = 'A Swift wrapper around Slauth Rust crate'
   s.description      = <<-DESC
 TODO: Add long description of the pod here.

build.gradle

@@ -26,7 +26,7 @@ properties.load(project.rootProject.file('local.properties').newDataInputStream(
 
 project('slauth') {
     ext {
-        libraryVersion = '0.7.17'
+        libraryVersion = '0.7.18'
     }
     publishing {
         repositories {

wrappers/android/build.gradle

@@ -26,7 +26,7 @@ android {
         minSdkVersion 23
         targetSdkVersion 28
         versionCode 1
-        versionName "0.7.17"
+        versionName "0.7.18"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 

wrappers/swift/classes/SlauthUtils.swift

@@ -0,0 +1,17 @@
+import Foundation
+
+public class SlauthUtils {
+     public static func convertPkcs8ToPrivateKey(pkcs8String: String) -> String {
+        let cString = pkcs8_to_custom_private_key(pkcs8String)
+        let privateKey = String(cString: cString!)
+        free(cString)
+        return privateKey
+    }
+
+    public static func convertPrivateKeyToPkcs8(privateKey: String) -> String {
+        let cString = private_key_to_pkcs8_der(privateKey)
+        let pkcs8String = String(cString: cString!)
+        free(cString)
+        return pkcs8String
+    }
+}

wrappers/swift/classes/WebAuthnCreationResponse.swift

@@ -23,20 +23,6 @@ public class WebAuthnCreationResponse: NSObject {
         return privateKey
     }
 
-    public func convertPkcs8ToPrivateKey(pkcs8String: String) -> String {
-        let cString = pkcs8_to_custom_private_key(pkcs8String)
-        let privateKey = String(cString: cString!)
-        free(cString)
-        return privateKey
-    }
-
-    public func convertPrivateKeyToPkcs8(privateKey: String) -> String {
-        let cString = private_key_to_pkcs8_der(privateKey)
-        let pkcs8String = String(cString: cString!)
-        free(cString)
-        return pkcs8String
-    }
-
 	public func getAttestationObject() -> Data {
 	    let buffer = get_attestation_object_from_response(self.raw)
         return Data(bytes: buffer.data, count: Int(buffer.len))