V0.6.0 Arroyo Toad

Added the capability to sign and verify P521 Signature

Sources/MessageUtils/Utils/CryptoUtils/Security.swift

@@ -0,0 +1,58 @@
+import Crypto  // Equivalent to CryptoKit (more or less)
+import Foundation
+
+
+//  ------------------
+//  --- Sign ---------
+//  ------------------
+public func signP521(object: Data, key: P521.Signing.PrivateKey)throws -> Data {
+    return try key.signature<Data>(for: object).rawRepresentation
+
+}
+/* 
+public func sign<T>(object: T, key: P521.Signing.PrivateKey) throws -> String {
+
+    var _object = object
+    let data: Data = Data(bytes: &_object, count: MemoryLayout<T>.stride)
+
+} */
+
+
+
+//  ------------------
+//  --- Decrypt ------
+//  ------------------
+public func verifySignatureP521(signature: Data, object: Data, key: P521.Signing.PublicKey) throws -> Bool {
+
+    let ecdsa: P521.Signing.ECDSASignature
+
+    do {
+        ecdsa = try P521.Signing.ECDSASignature(rawRepresentation: signature)
+    } catch {
+        throw SecurityError.NotDecodableError
+    }
+
+    return key.isValidSignature<Data>(ecdsa, for: object)
+}
+
+
+
+//  ------------------
+//  --- PEM 2 Key ----
+//  ------------------
+public func pem2key(filePath: String) throws -> P521.Signing.PrivateKey {
+
+    let pemURL: URL = URL(filePath: filePath)
+
+    return try pem2key(filePem: pemURL)
+}
+
+public func pem2key(filePem: URL) throws -> P521.Signing.PrivateKey {
+
+    let fileString: String = try String(contentsOf: filePem, encoding: String.Encoding.utf8)
+    return try pem2key(pemString: fileString)
+}
+
+public func pem2key(pemString: String) throws -> P521.Signing.PrivateKey {
+    return try P521.Signing.PrivateKey(pemRepresentation: pemString)
+}

Sources/MessageUtils/Utils/CryptoUtils/SecurityErrors.swift

@@ -0,0 +1,4 @@
+enum SecurityError: Error {
+    case NotEncodableError
+    case NotDecodableError
+}