sha1 -> sha256

EternalArrowBackup.sln

@@ -7,11 +7,11 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Source", "Source", "{A79A48
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{884B8E01-303A-40CF-8884-D62115F98683}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EternalArrowBackup.Hasher.SHA1", "Source\Hasher\SHA1\EternalArrowBackup.Hasher.SHA1.csproj", "{623151DA-A4E0-4A7F-B600-A51ABCDE7038}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EternalArrowBackup.Hasher.Sha256", "Source\Hasher\Sha256\EternalArrowBackup.Hasher.Sha256.csproj", "{623151DA-A4E0-4A7F-B600-A51ABCDE7038}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EternalArrowBackup.ContentTransformer.ClearText", "Source\ContentTransformer\ClearText\EternalArrowBackup.ContentTransformer.ClearText.csproj", "{E8D0BBF5-8DA6-49FA-AC86-9F766C203D99}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EternalArrowBackup.Hasher.SHA1.Tests", "Tests\Hasher\SHA1\EternalArrowBackup.Hasher.SHA1.Tests.csproj", "{92AF4CAA-64AF-4A43-A637-CD10FFEB2FEC}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EternalArrowBackup.Hasher.Sha256.Tests", "Tests\Hasher\Sha256\EternalArrowBackup.Hasher.Sha256.Tests.csproj", "{92AF4CAA-64AF-4A43-A637-CD10FFEB2FEC}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EternalArrowBackup.ContentTransformer.ClearText.Tests", "Tests\ContentTransformer\ClearText\EternalArrowBackup.ContentTransformer.ClearText.Tests.csproj", "{0F91FC45-54B3-4BC0-BB3D-83E963EBD00D}"
 EndProject

Source/Hasher/Sha256/Sha256ContentHasher.cs

@@ -1,19 +1,19 @@
-namespace EternalArrowBackup.Hasher.SHA1
+namespace EternalArrowBackup.Hasher.Sha256
 {
     using System.IO;
     using System.Linq;
     using System.Threading.Tasks;
     using EternalArrowBackup.Hasher.Contracts;
 
-    public class Sha1ContentHasher : IContentHasher
+    public class Sha256ContentHasher : IContentHasher
     {
         public Task<string> ComputeHash(Stream content)
         {
             return Task.Run(() =>
             {
-                using (var sha1 = System.Security.Cryptography.SHA1.Create())
+                using (var sha256 = System.Security.Cryptography.SHA256.Create())
                 {
-                    var hash = sha1.ComputeHash(content);
+                    var hash = sha256.ComputeHash(content);
                     return string.Concat(hash.Select(b => b.ToString("x2")));
                 }
             });

Tests/ContentTransformer/ClearText/EncryptorAndHasherTests.cs

@@ -2,7 +2,7 @@
 {
     using System.Text;
     using System.Threading.Tasks;
-    using EternalArrowBackup.Hasher.SHA1;
+    using EternalArrowBackup.Hasher.Sha256;
     using Xunit;
 
     public static class EncryptorAndHasherTests
@@ -15,7 +15,7 @@
         public static async Task TestCorrectDecryption(string message)
         {
             var messageBytes = Encoding.ASCII.GetBytes(message);
-            var hasher = new Sha1ContentHasher();
+            var hasher = new Sha256ContentHasher();
             var encryptor = new ClearTextContentEncryptor(hasher);
             var encrypted = await encryptor.TransformData(messageBytes);
 

Tests/ContentTransformer/ClearText/EternalArrowBackup.ContentTransformer.ClearText.Tests.csproj

@@ -13,7 +13,7 @@
   <ItemGroup>
     <ProjectReference Include="..\..\..\Source\ContentTransformer\ClearText\EternalArrowBackup.ContentTransformer.ClearText.csproj" />
     <ProjectReference Include="..\..\..\Source\Hasher\Contracts\EternalArrowBackup.Hasher.Contracts.csproj" />
-    <ProjectReference Include="..\..\..\Source\Hasher\SHA1\EternalArrowBackup.Hasher.SHA1.csproj" />
+    <ProjectReference Include="..\..\..\Source\Hasher\Sha256\EternalArrowBackup.Hasher.Sha256.csproj" />
   </ItemGroup>
 
   <ItemGroup>

Tests/Hasher/Sha256/EternalArrowBackup.Hasher.Sha256.Tests.csproj

@@ -11,7 +11,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\..\Source\Hasher\SHA1\EternalArrowBackup.Hasher.SHA1.csproj" />
+    <ProjectReference Include="..\..\..\Source\Hasher\Sha256\EternalArrowBackup.Hasher.Sha256.csproj" />
   </ItemGroup>
 
   <ItemGroup>

Tests/Hasher/Sha256/HasherTests.cs

@@ -1,4 +1,4 @@
-namespace EternalArrowBackup.Hasher.SHA1
+namespace EternalArrowBackup.Hasher.Sha256
 {
     using System;
     using System.Diagnostics;
@@ -9,19 +9,20 @@
 
     public static class HasherTests
     {
-        private const int MegabytesPerSecondLowSpeed = 200;
-        private const int MegabytesPerSecondHighSpeed = 1000;
+        // Single-threaded SHA256 performance on modern CPUs is around 200-500MB/s
+        private const int MegabytesPerSecondLowSpeed = 20;
+        private const int MegabytesPerSecondHighSpeed = 5000;
 
         // Test vectors taken from http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf
         [Theory]
         [Trait("Category", "Simple")]
-        [InlineData("DA39A3EE 5E6B4B0D 3255BFEF 95601890 AFD80709", "")]
-        [InlineData("A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D", "abc")]
-        [InlineData("84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq")]
+        [InlineData("E3B0C442 98FC1C14 9AFBF4C8 996FB924 27AE41E4 649B934C A495991B 7852B855", "")]
+        [InlineData("BA7816BF 8F01CFEA 414140DE 5DAE2223 B00361A3 96177A9C B410FF61 F20015AD", "abc")]
+        [InlineData("248D6A61 D20638B8 E5C02693 0C3E6039 A33CE459 64FF2167 F6ECEDD4 19DB06C1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq")]
         public static async Task TestHashes(string expectedHash, string inputMessage)
         {
             var expectedHashFormatted = expectedHash.Replace(" ", string.Empty).ToLowerInvariant();
-            var hasher = new Sha1ContentHasher();
+            var hasher = new Sha256ContentHasher();
             var messageBytes = Encoding.ASCII.GetBytes(inputMessage);
             using (var stream = new MemoryStream(messageBytes))
             {
@@ -30,7 +31,6 @@
             }
         }
 
-        // Single-threaded SHA1 performance on i5-6500 is around 500MB/s
         [Theory]
         [Trait("Category", "Integration")]
         [InlineData(0)]
@@ -45,13 +45,13 @@
             var messageBytes = new byte[length];
             for (var i = 0; i < length; i++)
             {
-                messageBytes[i] = (byte)((int)(Math.E * length + Math.PI * i) % 256);
+                messageBytes[i] = (byte)((int)(Math.E * i * i + Math.PI * i) % 256);
             }
 
             var expectedTimeLow = length / (MegabytesPerSecondHighSpeed * 1000);
             var expectedTimeHigh = 1 + length / (MegabytesPerSecondLowSpeed * 1000);
 
-            var hasher = new Sha1ContentHasher();
+            var hasher = new Sha256ContentHasher();
             using (var stream = new MemoryStream(messageBytes))
             {
                 await hasher.ComputeHash(stream);