Add CRC-32/DVD-ROM-EDC (fixes #4)

Author: mnadareski

SabreTools.Hashing.Test/SpamSumTests.cs

@@ -42,4 +42,4 @@ public void FuzzyCompareTest(string? stringOne, string? stringTwo, int expected)
             Assert.Equal(expected, result);
         }
     }
-}
+}

SabreTools.Hashing.Test/TestHelper.cs

@@ -6,7 +6,7 @@ namespace SabreTools.Hashing.Test
     /// <summary>
     /// Helper class for tests
     /// </summary>
-    /// CRC values confirmed with <see href="https://emn178.github.io/online-tools/crc/"/> 
+    /// CRC values confirmed with <see href="https://emn178.github.io/online-tools/crc/"/>
     internal static class TestHelper
     {
         #region Known File Information
@@ -143,6 +143,7 @@ internal static class TestHelper
             {HashType.CRC32_BZIP2, "18aa4603"},
             {HashType.CRC32_CDROMEDC, "b8ced467"},
             {HashType.CRC32_CKSUM, "f27b3c27"},
+            {HashType.CRC32_DVDROMEDC, "b538afc0"},
             {HashType.CRC32_ISCSI, "544d37db"},
             {HashType.CRC32_ISOHDLC, "ba02a660"},
             {HashType.CRC32_JAMCRC, "45fd599f"},
@@ -244,4 +245,4 @@ public static void ValidateHash(HashType hashType, string? hashValue)
         public static void ValidateSize(long fileSize)
             => Assert.Equal(_hashFileSize, fileSize);
     }
-}
+}

SabreTools.Hashing/Checksum/StandardDefinitions.cs

@@ -1481,6 +1481,20 @@ public static class StandardDefinitions
             XorOut = 0xffffffff,
         };
 
+        /// <summary>
+        /// CRC-32/DVD-ROM-EDC
+        /// </summary>
+        public static readonly CrcDefinition CRC32_DVDROMEDC = new()
+        {
+            Name = "CRC-32/DVD-ROM-EDC",
+            Width = 32,
+            Poly = 0x80000011,
+            Init = 0x00000000,
+            ReflectIn = false,
+            ReflectOut = false,
+            XorOut = 0x00000000,
+        };
+
         /// <summary>
         /// CRC-32/ISCSI
         /// </summary>

SabreTools.Hashing/Extensions.cs

@@ -138,6 +138,7 @@ public static class Extensions
                 HashType.CRC32_BZIP2 => "BZIP2",
                 HashType.CRC32_CDROMEDC => "CRC-32/CD-ROM-EDC",
                 HashType.CRC32_CKSUM => "CRC-32/CKSUM",
+                HashType.CRC32_DVDROMEDC => "CRC-32/DVD-ROM-EDC",
                 HashType.CRC32_ISCSI => "CRC-32/ISCSI",
                 HashType.CRC32_ISOHDLC => "CRC-32/ISO-HDLC",
                 HashType.CRC32_JAMCRC => "CRC-32/JAMCRC",
@@ -364,6 +365,7 @@ public static class Extensions
                 "crc32_bzip2" => HashType.CRC32_BZIP2,
                 "crc32_cdromedc" => HashType.CRC32_CDROMEDC,
                 "crc32_cksum" => HashType.CRC32_CKSUM,
+                "crc32_dvdromedc" => HashType.CRC32_DVDROMEDC,
                 "crc32_iscsi" => HashType.CRC32_ISCSI,
                 "crc32_isohdlc" => HashType.CRC32_ISOHDLC,
                 "crc32_jamcrc" => HashType.CRC32_JAMCRC,

SabreTools.Hashing/HashType.cs

@@ -615,6 +615,11 @@ public enum HashType
         /// </summary>
         CRC32_CKSUM,
 
+        /// <summary>
+        /// CRC 32-bit checksum (CRC-32/DVD-ROM-EDC)
+        /// </summary>
+        CRC32_DVDROMEDC,
+
         /// <summary>
         /// CRC 32-bit checksum (CRC-32/ISCSI)
         /// </summary>

SabreTools.Hashing/HashWrapper.cs

@@ -208,6 +208,7 @@ private void GetHasher()
                 HashType.CRC32_BZIP2 => new Crc(StandardDefinitions.CRC32_BZIP2),
                 HashType.CRC32_CDROMEDC => new Crc(StandardDefinitions.CRC32_CDROMEDC),
                 HashType.CRC32_CKSUM => new Crc(StandardDefinitions.CRC32_CKSUM),
+                HashType.CRC32_DVDROMEDC => new Crc(StandardDefinitions.CRC32_DVDROMEDC),
                 HashType.CRC32_ISCSI => new Crc(StandardDefinitions.CRC32_ISCSI),
                 HashType.CRC32_ISOHDLC => new Crc(StandardDefinitions.CRC32_ISOHDLC),
                 HashType.CRC32_JAMCRC => new Crc(StandardDefinitions.CRC32_JAMCRC),

SabreTools.Hashing/ZeroHash.cs

@@ -221,6 +221,7 @@ public static class ZeroHash
             {HashType.CRC32_BZIP2, [0x00, 0x00, 0x00, 0x00]},
             {HashType.CRC32_CDROMEDC, [0x00, 0x00, 0x00, 0x00]},
             {HashType.CRC32_CKSUM, [0xff, 0xff, 0xff, 0xff]},
+            {HashType.CRC32_DVDROMEDC, [0x00, 0x00, 0x00, 0x00]},
             {HashType.CRC32_ISCSI, [0x00, 0x00, 0x00, 0x00]},
             {HashType.CRC32_ISOHDLC, [0x00, 0x00, 0x00, 0x00]},
             {HashType.CRC32_JAMCRC, [0xff, 0xff, 0xff, 0xff]},
@@ -523,6 +524,7 @@ public static class ZeroHash
             {HashType.CRC32_BZIP2, "00000000"},
             {HashType.CRC32_CDROMEDC, "00000000"},
             {HashType.CRC32_CKSUM, "ffffffff"},
+            {HashType.CRC32_DVDROMEDC, "00000000"},
             {HashType.CRC32_ISCSI, "00000000"},
             {HashType.CRC32_ISOHDLC, "00000000"},
             {HashType.CRC32_JAMCRC, "ffffffff"},