Error fixes

cas-dotnet-sdk/Asymmetric/Types/RsaKeyPairResult.cs

@@ -2,7 +2,7 @@
 {
     public class RsaKeyPairResult
     {
-        public string PublicKey { get; set; }
-        public string PrivateKey { get; set; }
+        public string PublicKey { get; set; } = string.Empty;
+        public string PrivateKey { get; set; } = string.Empty;
     }
 }

cas-dotnet-sdk/Asymmetric/Types/RsaSignResult.cs

@@ -2,7 +2,7 @@
 {
     public class RsaSignResult
     {
-        public string Signature { get; set; }
-        public string PublicKey { get; set; }
+        public string Signature { get; set; } = string.Empty;
+        public string PublicKey { get; set; } = string.Empty;
     }
 }

cas-dotnet-sdk/Helpers/NativeString.cs

@@ -18,9 +18,9 @@ public static string ReadAndFree(byte* ptr)
         {
             if (ptr == null)
             {
-                return null;
+                return string.Empty;
             }
-            string value = Marshal.PtrToStringUTF8((IntPtr)ptr);
+            string value = Marshal.PtrToStringUTF8((IntPtr)ptr) ?? string.Empty;
             NativeMethods.free_cstring(ptr);
             return value;
         }

cas-dotnet-sdk/Hybrid/Types/HpkeEncryptResult.cs

@@ -1,9 +1,11 @@
-namespace CasDotnetSdk.Hybrid.Types
+using System;
+
+namespace CasDotnetSdk.Hybrid.Types
 {
     public class HpkeEncryptResult
     {
-        public byte[] EncappedKey { get; set; }
-        public byte[] Ciphertext { get; set; }
-        public byte[] Tag { get; set; }
+        public byte[] EncappedKey { get; set; } = Array.Empty<byte>();
+        public byte[] Ciphertext { get; set; } = Array.Empty<byte>();
+        public byte[] Tag { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/Hybrid/Types/HpkeKeyPairResult.cs

@@ -1,9 +1,11 @@
-namespace CasDotnetSdk.Hybrid.Types
+using System;
+
+namespace CasDotnetSdk.Hybrid.Types
 {
     public class HpkeKeyPairResult
     {
-        public byte[] PrivateKey { get; set; }
-        public byte[] PublicKey { get; set; }
-        public byte[] InfoStr { get; set; }
+        public byte[] PrivateKey { get; set; } = Array.Empty<byte>();
+        public byte[] PublicKey { get; set; } = Array.Empty<byte>();
+        public byte[] InfoStr { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/KeyExchange/Types/X25519SecretPublicKey.cs

@@ -1,8 +1,10 @@
-namespace CasDotnetSdk.KeyExchange.Types
+using System;
+
+namespace CasDotnetSdk.KeyExchange.Types
 {
     public class X25519SecretPublicKey
     {
-        public byte[] SecretKey { get; set; }
-        public byte[] PublicKey { get; set; }
+        public byte[] SecretKey { get; set; } = Array.Empty<byte>();
+        public byte[] PublicKey { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/KeyExchange/Types/X25519SharedSecret.cs

@@ -1,7 +1,9 @@
-namespace CasDotnetSdk.KeyExchange.Types
+using System;
+
+namespace CasDotnetSdk.KeyExchange.Types
 {
     public class X25519SharedSecret
     {
-        public byte[] SharedSecret { get; set; }
+        public byte[] SharedSecret { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/PQC/Types/SLHDSAKeyPair.cs

@@ -1,8 +1,10 @@
+using System;
+
 namespace CasDotnetSdk.PQC.Types
 {
     public class SLHDSAKeyPair
     {
-        public byte[] SigningKey { get; set; }
-        public byte[] VerificationKey { get; set; }
+        public byte[] SigningKey { get; set; } = Array.Empty<byte>();
+        public byte[] VerificationKey { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/PasswordHashers/PasswordHasherFactory.cs

@@ -1,4 +1,6 @@
-namespace CasDotnetSdk.PasswordHashers
+using System;
+
+namespace CasDotnetSdk.PasswordHashers
 {
     public enum PasswordHasherType
     {
@@ -11,20 +13,13 @@ public static class PasswordHasherFactory
     {
         public static IPasswordHasherBase Get(PasswordHasherType type)
         {
-            IPasswordHasherBase hasher = null;
-            switch (type)
+            return type switch
             {
-                case PasswordHasherType.Argon2:
-                    hasher = new Argon2Wrapper();
-                    break;
-                case PasswordHasherType.BCrypt:
-                    hasher = new BcryptWrapper();
-                    break;
-                case PasswordHasherType.SCrypt:
-                    hasher = new SCryptWrapper();
-                    break;
-            }
-            return hasher;
+                PasswordHasherType.Argon2 => new Argon2Wrapper(),
+                PasswordHasherType.BCrypt => new BcryptWrapper(),
+                PasswordHasherType.SCrypt => new SCryptWrapper(),
+                _ => throw new ArgumentOutOfRangeException(nameof(type), type, "Unsupported password hasher type.")
+            };
         }
     }
 }

cas-dotnet-sdk/Signatures/ED25519Wrapper.cs

@@ -61,15 +61,15 @@ public Ed25519ByteSignatureResult SignBytes(byte[] keyBytes, byte[] dataToSign)
         /// </summary>
         public bool VerifyBytes(byte[] keyPair, byte[] signature, byte[] dataToVerify)
         {
-            if (keyPair?.Length == 0)
+            if (keyPair == null || keyPair.Length == 0)
             {
                 throw new Exception("You must provide allocated key pair data to Verify Bytes with ED25519-Dalek");
             }
-            if (signature?.Length == 0)
+            if (signature == null || signature.Length == 0)
             {
                 throw new Exception("You must provide allocated signature data to Verify Bytes with ED25519-Dalek");
             }
-            if (dataToVerify?.Length == 0)
+            if (dataToVerify == null || dataToVerify.Length == 0)
             {
                 throw new Exception("You must provide allocated data to Verify with ED25519-Dalek");
             }
@@ -89,15 +89,15 @@ public bool VerifyBytes(byte[] keyPair, byte[] signature, byte[] dataToVerify)
         /// </summary>
         public bool VerifyWithPublicKeyBytes(byte[] publicKey, byte[] signature, byte[] dataToVerify)
         {
-            if (publicKey?.Length == 0)
+            if (publicKey == null || publicKey.Length == 0)
             {
                 throw new Exception("You must provide allocated data for the public key to verify with ED25519-Dalek");
             }
-            if (signature?.Length == 0)
+            if (signature == null || signature.Length == 0)
             {
                 throw new Exception("You must provide allocated data for the signature to verify with ED25519-Dalek");
             }
-            if (dataToVerify?.Length == 0)
+            if (dataToVerify == null || dataToVerify.Length == 0)
             {
                 throw new Exception("You must provide allocated data to verify for the signature to verify with ED25519-Dalek");
             }

cas-dotnet-sdk/Signatures/Types/Ed25519ByteSignatureResult.cs

@@ -1,8 +1,10 @@
-namespace CasDotnetSdk.Signatures.Types
+using System;
+
+namespace CasDotnetSdk.Signatures.Types
 {
     public class Ed25519ByteSignatureResult
     {
-        public byte[] Signature { get; set; }
-        public byte[] PublicKey { get; set; }
+        public byte[] Signature { get; set; } = Array.Empty<byte>();
+        public byte[] PublicKey { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/Signatures/Types/Ed25519KeyPairResult.cs

@@ -1,8 +1,10 @@
-namespace CasDotnetSdk.Signatures.Types
+using System;
+
+namespace CasDotnetSdk.Signatures.Types
 {
     public class Ed25519KeyPairResult
     {
-        public byte[] SigningKey { get; set; }
-        public byte[] VerifyingKey { get; set; }
+        public byte[] SigningKey { get; set; } = Array.Empty<byte>();
+        public byte[] VerifyingKey { get; set; } = Array.Empty<byte>();
     }
 }

cas-dotnet-sdk/Signatures/Types/Ed25519SignatureResult.cs

@@ -2,7 +2,7 @@
 {
     public class Ed25519SignatureResult
     {
-        public string Signature { get; set; }
-        public string PublicKey { get; set; }
+        public string Signature { get; set; } = string.Empty;
+        public string PublicKey { get; set; } = string.Empty;
     }
 }

cas-dotnet-sdk/Sponges/AsconWrapper.cs

@@ -33,11 +33,11 @@ public byte[] Ascon128Nonce()
         /// </summary>
         public byte[] Ascon128Encrypt(byte[] nonce, byte[] key, byte[] toEncrypt)
         {
-            if (nonce?.Length == 0)
+            if (nonce == null || nonce.Length == 0)
             {
                 throw new Exception("You must provide a nonce to encrypt with Ascon 128");
             }
-            if (key?.Length == 0)
+            if (key == null || key.Length == 0)
             {
                 throw new Exception("You must provide a key to encrypt with Ascon 128");
             }
@@ -61,11 +61,11 @@ public byte[] Ascon128Encrypt(byte[] nonce, byte[] key, byte[] toEncrypt)
         /// </summary>
         public byte[] Ascon128Decrypt(byte[] nonce, byte[] key, byte[] toDecrypt)
         {
-            if (nonce?.Length == 0)
+            if (nonce == null || nonce.Length == 0)
             {
                 throw new Exception("You must provide a nonce to decrypt with Ascon 128");
             }
-            if (key?.Length == 0)
+            if (key == null || key.Length == 0)
             {
                 throw new Exception("You must provide a key to decrypt with Ascon 128");
             }

cas-dotnet-sdk/Symmetric/Types/AesEncryptResult.cs

@@ -2,7 +2,7 @@
 {
     public class AesEncryptResult
     {
-        public string Key { get; set; }
-        public string CipherText { get; set; }
+        public string Key { get; set; } = string.Empty;
+        public string CipherText { get; set; } = string.Empty;
     }
 }

cas-dotnet-sdk/cas-dotnet-sdk.csproj

@@ -9,7 +9,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>  
     <Title>cas-dotnet-sdk</Title>
     <PackageIcon>icon.jpeg</PackageIcon>
-    <Version>1.9.76</Version>
+    <Version>1.9.77</Version>
     <Authors>Mike Mulchrone</Authors>
     <Description>A Nuget package that provides a implementation of the RustCrypto suite of cryptographic algorithms.</Description>
     <RepositoryUrl>https://github.com/Cryptographic-API-Services/cas-dotnet-sdk</RepositoryUrl>