Added initial support for signature

Tests/IoT-Simulator-CoreTests/IoT_Simulator_CoreTests.swift

@@ -1,9 +1,11 @@
 import Testing
 import RandomCpp
+import Foundation
+import SwiftASN1
 
 @testable import IoT_Simulator_Core
 
-@Test func example() async throws {
+@Test func workingGeneratorTest() async throws {
     // Write your test here and use APIs like `#expect(...)` to check expected conditions.
     var a = GaussianRNG(10, 0.5)
 
@@ -11,3 +13,46 @@ import RandomCpp
         print(a.generate())
     }
 }
+
+@Test func pemDecoded() async throws {
+    /*
+    Even though here you would expect both texts to be equal,
+    the openssl generated one (the raw string) is ANSI x9.62
+    while ours (the one made with the library) is ASN.1
+
+    When inspected with openssl, both curves where identical,
+    so no need to be worried
+    */
+    let keyPath = "./Private/privateKey.pem"
+
+    let url = URL(filePath: keyPath)
+    let pemString = try String(contentsOf: url, encoding: String.Encoding.utf8)
+    
+
+    let key = try pem2key(filePath: keyPath)
+    print(pemString)
+    print(key.pemRepresentation)
+}
+
+@Test func sign() async throws {
+    let keyPath = "./Private/privateKey.pem"
+    let key = try pem2key(filePath: keyPath)
+
+    let obj = [1, 2, 3] 
+
+    let signature = try sign(object: obj, key: key)
+
+
+}
+
+@Test func verifySignature() async throws {
+    let keyPath = "./Private/privateKey.pem"
+    let key = try pem2key(filePath: keyPath)
+
+    let obj = "[1, 2, 3]"
+
+    let signature = try sign(object: obj, key: key)
+
+    
+
+}