Implementation of SecureString and CryptoRngProvider

SystemExtensions.NetStandard.Security.Tests/AesEncrypterTests.cs

@@ -7,7 +7,7 @@ using System.Text;
 using System.Threading.Tasks;
 using SystemExtensions.NetStandard.Security.Encryption;
 
-namespace VaultO.Tests
+namespace SystemExtensions.NetStandard.Security.Tests
 {
     [TestClass]
     public class AesEncrypterTests

SystemExtensions.NetStandard.Security.Tests/CryptoRngProviderTests.cs

@@ -0,0 +1,39 @@
+using FluentAssertions;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Linq;
+using System.Rng;
+
+namespace SystemExtensions.NetStandard.Security.Tests
+{
+    [TestClass]
+    public class CryptoRngProviderTests
+    {
+        private CryptoRngProvider cryptoRngProvider;
+
+        [TestInitialize]
+        public void TestInitialize()
+        {
+            this.cryptoRngProvider = new CryptoRngProvider();
+        }
+
+        [TestMethod]
+        public void GetBytes_ShouldSetValues()
+        {
+            var bytes = new byte[100];
+
+            this.cryptoRngProvider.GetBytes(bytes);
+
+            bytes.All(b => b == 0).Should().BeFalse();
+        }
+
+        [TestMethod]
+        public void GetNonZeroBytes_ShouldSetNonZeroValues()
+        {
+            var bytes = new byte[100];
+
+            this.cryptoRngProvider.GetNonZeroBytes(bytes);
+
+            bytes.All(b => b != 0).Should().BeTrue();
+        }
+    }
+}

SystemExtensions.NetStandard.Security.Tests/SecureStringTests.cs

@@ -0,0 +1,134 @@
+using FluentAssertions;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using System.Encryption;
+
+namespace SystemExtensions.NetStandard.Security.Tests
+{
+    [TestClass]
+    public class SecureStringTests
+    {
+        [TestMethod]
+        public void SecureString_NewSecureString_ReturnsValue()
+        {
+            var str = new SecureString("hello");
+
+            str.Value.Should().Be("hello");
+        }
+
+        [TestMethod]
+        public void SecureStringEmpty_AreEqual()
+        {
+            var str = SecureString.Empty;
+            str.Should().Be(SecureString.Empty);
+        }
+
+        [TestMethod]
+        public void SecureStringEmpty_Equals_StringEmpty()
+        {
+            var ss = SecureString.Empty;
+            var s = string.Empty;
+
+            ss.Should().Be(s);
+        }
+
+        [TestMethod]
+        public void SecureString_Equals_OtherSecureString()
+        {
+            var ss1 = new SecureString("Hello");
+            var ss2 = new SecureString("Hello");
+
+            ss1.Equals(ss2).Should().BeTrue();
+        }
+
+        [TestMethod]
+        [DataRow("hello", "hello", true)]
+        [DataRow("hello", "henlo", false)]
+        public void SecureString_EqualOperator_OtherSecureString(string str1, string str2, bool isEqual)
+        {
+            var ss1 = new SecureString(str1);
+            var ss2 = new SecureString(str2);
+
+            (ss1 == ss2).Should().Be(isEqual);
+        }
+
+        [TestMethod]
+        [DataRow("hello", "hello", false)]
+        [DataRow("hello", "henlo", true)]
+        public void SecureString_DifferentOperator_OtherSecureString(string str1, string str2, bool isDifferent)
+        {
+            var ss1 = new SecureString(str1);
+            var ss2 = new SecureString(str2);
+
+            (ss1 != ss2).Should().Be(isDifferent);
+        }
+
+        [TestMethod]
+        [DataRow("hello", "hello", true)]
+        [DataRow("hello", "henlo", false)]
+        public void SecureString_EqualOperator_String(string str1, string str2, bool isEqual)
+        {
+            var ss1 = new SecureString(str1);
+
+            (ss1 == str2).Should().Be(isEqual);
+        }
+
+        [TestMethod]
+        [DataRow("hello", "hello", false)]
+        [DataRow("hello", "henlo", true)]
+        public void SecureString_DifferentOperator_String(string str1, string str2, bool isDifferent)
+        {
+            var ss1 = new SecureString(str1);
+
+            (ss1 != str2).Should().Be(isDifferent);
+        }
+
+        [TestMethod]
+        public void SecureString_PlusOperator_SecureString()
+        {
+            var ss1 = new SecureString("Hello ");
+            var ss2 = new SecureString("World");
+
+            (ss1 + ss2).Should().Be("Hello World");
+        }
+
+        [TestMethod]
+        public void SecureString_PlusOperator_String()
+        {
+            var ss1 = new SecureString("Hello ");
+            var ss2 = "World";
+
+            (ss1 + ss2).Should().Be("Hello World");
+        }
+
+        [TestMethod]
+        public void SecureString_PlusOperator_Char()
+        {
+            var ss1 = new SecureString("Hello ");
+            var c = 'W';
+
+            (ss1 + c).Should().Be("Hello W");
+        }
+
+        [TestMethod]
+        public void SecureString_WithOptionalEntropy_Matches()
+        {
+            SecureString.AddOptionalEntropy(new byte[] { 10, 20, 25, 34, 56, 12, 10, 81, 200, 155, 123, 144, 123, 192, 122, 1 });
+            var ss1 = new SecureString("Hello");
+            var ss2 = new SecureString("Hello");
+
+            ss1.Should().Be(ss2);
+        }
+
+        [TestMethod]
+        public void SecureString_ChangingEntropy_ThrowsOnPreviousValue()
+        {
+            var ss1 = new SecureString("Hello");
+            SecureString.AddOptionalEntropy(new byte[] { 10, 20, 25, 34, 56, 12, 10, 81, 200, 155, 123, 144, 123, 192, 122, 1 });
+
+            var action = new Func<string>(() => ss1.Value);
+
+            action.Should().Throw<Exception>();
+        }
+    }
+}

SystemExtensions.NetStandard.Security.Tests/Sha256HashingServiceTests.cs

@@ -6,7 +6,7 @@ using System.Text;
 using System.Threading.Tasks;
 using SystemExtensions.NetStandard.Security.Hashing;
 
-namespace VaultO.Tests
+namespace SystemExtensions.NetStandard.Security.Tests
 {
     [TestClass]
     public sealed class Sha256HashingServiceTests