Added lots of tests from Lib SelfTest.cs to Test project

Code cleanup in KeePassLib
Code cleanup in ModernKeePass.Tests
Argon2Kdf files can now be opened
WIP - Argon2kdf files are corrupted on write

ModernKeePassLib.Test/Cryptography/Hash/Blake2bTests.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Text;
+using ModernKeePassLib.Cryptography;
+using ModernKeePassLib.Cryptography.Hash;
+using ModernKeePassLib.Utility;
+using NUnit.Framework;
+
+namespace ModernKeePassLib.Test.Cryptography.Hash
+{
+    [TestFixture]
+    public class Blake2bTests
+    {
+        [Test]
+        public void TestBlake2b()
+        {
+            Blake2b h = new Blake2b();
+
+            // ======================================================
+            // From https://tools.ietf.org/html/rfc7693
+
+            byte[] pbData = StrUtil.Utf8.GetBytes("abc");
+            byte[] pbExpc = new byte[64] {
+                0xBA, 0x80, 0xA5, 0x3F, 0x98, 0x1C, 0x4D, 0x0D,
+                0x6A, 0x27, 0x97, 0xB6, 0x9F, 0x12, 0xF6, 0xE9,
+                0x4C, 0x21, 0x2F, 0x14, 0x68, 0x5A, 0xC4, 0xB7,
+                0x4B, 0x12, 0xBB, 0x6F, 0xDB, 0xFF, 0xA2, 0xD1,
+                0x7D, 0x87, 0xC5, 0x39, 0x2A, 0xAB, 0x79, 0x2D,
+                0xC2, 0x52, 0xD5, 0xDE, 0x45, 0x33, 0xCC, 0x95,
+                0x18, 0xD3, 0x8A, 0xA8, 0xDB, 0xF1, 0x92, 0x5A,
+                0xB9, 0x23, 0x86, 0xED, 0xD4, 0x00, 0x99, 0x23
+            };
+
+            byte[] pbC = h.ComputeHash(pbData);
+            Assert.That(MemUtil.ArraysEqual(pbC, pbExpc), Is.True);
+
+            // ======================================================
+            // Computed using the official b2sum tool
+
+            pbExpc = new byte[64] {
+                0x78, 0x6A, 0x02, 0xF7, 0x42, 0x01, 0x59, 0x03,
+                0xC6, 0xC6, 0xFD, 0x85, 0x25, 0x52, 0xD2, 0x72,
+                0x91, 0x2F, 0x47, 0x40, 0xE1, 0x58, 0x47, 0x61,
+                0x8A, 0x86, 0xE2, 0x17, 0xF7, 0x1F, 0x54, 0x19,
+                0xD2, 0x5E, 0x10, 0x31, 0xAF, 0xEE, 0x58, 0x53,
+                0x13, 0x89, 0x64, 0x44, 0x93, 0x4E, 0xB0, 0x4B,
+                0x90, 0x3A, 0x68, 0x5B, 0x14, 0x48, 0xB7, 0x55,
+                0xD5, 0x6F, 0x70, 0x1A, 0xFE, 0x9B, 0xE2, 0xCE
+            };
+
+            pbC = h.ComputeHash(MemUtil.EmptyByteArray);
+            Assert.That(MemUtil.ArraysEqual(pbC, pbExpc), Is.True);
+
+            // ======================================================
+            // Computed using the official b2sum tool
+
+            string strS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.:,;_-\r\n";
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < 1000; ++i) sb.Append(strS);
+            pbData = StrUtil.Utf8.GetBytes(sb.ToString());
+
+            pbExpc = new byte[64] {
+                0x59, 0x69, 0x8D, 0x3B, 0x83, 0xF4, 0x02, 0x4E,
+                0xD8, 0x99, 0x26, 0x0E, 0xF4, 0xE5, 0x9F, 0x20,
+                0xDC, 0x31, 0xEE, 0x5B, 0x45, 0xEA, 0xBB, 0xFC,
+                0x1C, 0x0A, 0x8E, 0xED, 0xAA, 0x7A, 0xFF, 0x50,
+                0x82, 0xA5, 0x8F, 0xBC, 0x4A, 0x46, 0xFC, 0xC5,
+                0xEF, 0x44, 0x4E, 0x89, 0x80, 0x7D, 0x3F, 0x1C,
+                0xC1, 0x94, 0x45, 0xBB, 0xC0, 0x2C, 0x95, 0xAA,
+                0x3F, 0x08, 0x8A, 0x93, 0xF8, 0x75, 0x91, 0xB0
+            };
+
+            Random r = CryptoRandom.NewWeakRandom();
+            int p = 0;
+            while (p < pbData.Length)
+            {
+                int cb = r.Next(1, pbData.Length - p + 1);
+                h.TransformBlock(pbData, p, cb, pbData, p);
+                p += cb;
+            }
+            Assert.That(p, Is.EqualTo(pbData.Length));
+
+            h.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0);
+
+            Assert.That(MemUtil.ArraysEqual(h.Hash, pbExpc), Is.True);
+
+            h.Clear();
+        }
+    }
+}

ModernKeePassLib.Test/Cryptography/Hash/HmacTests.cs

@@ -0,0 +1,82 @@
+using ModernKeePassLib.Cryptography;
+using ModernKeePassLib.Cryptography.Hash;
+using ModernKeePassLib.Utility;
+using NUnit.Framework;
+
+namespace ModernKeePassLib.Test.Cryptography.Hash
+{
+    [TestFixture]
+    public class HmacTests
+    {
+        [Test]
+        public void TestHmac1()
+        {
+            // Test vectors from RFC 4231
+
+            var pbKey = new byte[20];
+            for (var i = 0; i < pbKey.Length; ++i) pbKey[i] = 0x0B;
+            var pbMsg = StrUtil.Utf8.GetBytes("Hi There");
+            var pbExpc = new byte[]
+            {
+                0xB0, 0x34, 0x4C, 0x61, 0xD8, 0xDB, 0x38, 0x53,
+                0x5C, 0xA8, 0xAF, 0xCE, 0xAF, 0x0B, 0xF1, 0x2B,
+                0x88, 0x1D, 0xC2, 0x00, 0xC9, 0x83, 0x3D, 0xA7,
+                0x26, 0xE9, 0x37, 0x6C, 0x2E, 0x32, 0xCF, 0xF7
+            };
+            HmacEval(pbKey, pbMsg, pbExpc);
+        }
+
+        [Test]
+        public void TestHmac2()
+        {
+            var pbKey = new byte[131];
+            for (var i = 0; i < pbKey.Length; ++i) pbKey[i] = 0xAA;
+            var pbMsg = StrUtil.Utf8.GetBytes(
+                "This is a test using a larger than block-size key and " +
+                "a larger than block-size data. The key needs to be " +
+                "hashed before being used by the HMAC algorithm.");
+            var pbExpc = new byte[] {
+                0x9B, 0x09, 0xFF, 0xA7, 0x1B, 0x94, 0x2F, 0xCB,
+                0x27, 0x63, 0x5F, 0xBC, 0xD5, 0xB0, 0xE9, 0x44,
+                0xBF, 0xDC, 0x63, 0x64, 0x4F, 0x07, 0x13, 0x93,
+                0x8A, 0x7F, 0x51, 0x53, 0x5C, 0x3A, 0x35, 0xE2
+            };
+            HmacEval(pbKey, pbMsg, pbExpc);
+        }
+
+        [Test]
+        public void TestHmacOtp()
+        {
+            var pbSecret = StrUtil.Utf8.GetBytes("12345678901234567890");
+            var vExp = new []{ "755224", "287082", "359152",
+                "969429", "338314", "254676", "287922", "162583", "399871",
+                "520489" };
+
+            for (var i = 0; i < vExp.Length; ++i)
+            {
+                Assert.That(HmacOtp.Generate(pbSecret, (ulong)i, 6, false, -1), Is.EqualTo(vExp[i]));
+            }
+        }
+
+        private static void HmacEval(byte[] pbKey, byte[] pbMsg,
+            byte[] pbExpc)
+        {
+            using (var h = new HMACSHA256(pbKey))
+            {
+                h.TransformBlock(pbMsg, 0, pbMsg.Length, pbMsg, 0);
+                h.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0);
+
+                byte[] pbHash = h.Hash;
+                Assert.That(MemUtil.ArraysEqual(pbHash, pbExpc), Is.True);
+
+                // Reuse the object
+                h.Initialize();
+                h.TransformBlock(pbMsg, 0, pbMsg.Length, pbMsg, 0);
+                h.TransformFinalBlock(MemUtil.EmptyByteArray, 0, 0);
+
+                pbHash = h.Hash;
+                Assert.That(MemUtil.ArraysEqual(pbHash, pbExpc), Is.True);
+            }
+        }
+    }
+}