Add net47 target framework

Author: scott-xu

src/Renci.SshNet/Common/SshDataStream.cs

@@ -56,7 +56,7 @@ public bool IsEndOfData
             }
         }
 
-#if NET462 || NETSTANDARD2_0
+#if NETFRAMEWORK || NETSTANDARD2_0
         private int Read(Span<byte> buffer)
         {
             var sharedBuffer = System.Buffers.ArrayPool<byte>.Shared.Rent(buffer.Length);

src/Renci.SshNet/Renci.SshNet.csproj

@@ -4,7 +4,7 @@
     <AssemblyName>Renci.SshNet</AssemblyName>
     <Product>SSH.NET</Product>
     <AssemblyTitle>SSH.NET</AssemblyTitle>
-    <TargetFrameworks>net462;netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net462;net47;netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -34,7 +34,7 @@
     <IsAotCompatible>true</IsAotCompatible>
   </PropertyGroup>
 
-  <ItemGroup Condition=" '$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'netstandard2.0' ">
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'net47' or '$(TargetFramework)' == 'netstandard2.0' ">
     <!-- Must be kept at version 1.0.0 or higher, see https://github.com/sshnet/SSH.NET/pull/1288 for details. -->
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="[1.0.0,)" />
     <PackageReference Include="System.Memory" Version="4.5.5" />

src/Renci.SshNet/Security/Cryptography/EcdsaDigitalSignature.cs

@@ -41,7 +41,7 @@ public override bool Verify(byte[] input, byte[] signature)
             // for 521 sig_size is 132
             var sig_size = _key.KeyLength == 521 ? 132 : _key.KeyLength / 4;
             var ssh_data = new SshDataSignature(signature, sig_size);
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
             var ecdsa = _key.Ecdsa;
             ecdsa.HashAlgorithm = _key.HashAlgorithm;
             return ecdsa.VerifyData(input, ssh_data.Signature);
@@ -59,7 +59,7 @@ public override bool Verify(byte[] input, byte[] signature)
         /// </returns>
         public override byte[] Sign(byte[] input)
         {
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
             var ecdsa = _key.Ecdsa;
             ecdsa.HashAlgorithm = _key.HashAlgorithm;
             var signed = ecdsa.SignData(input);

src/Renci.SshNet/Security/Cryptography/EcdsaKey.cs

@@ -1,9 +1,9 @@
 using System;
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
 using System.Globalization;
 using System.IO;
 using System.Runtime.InteropServices;
-#endif // NETFRAMEWORK
+#endif
 using System.Security.Cryptography;
 using System.Text;
 
@@ -26,7 +26,7 @@ public class EcdsaKey : Key, IDisposable
         private EcdsaDigitalSignature _digitalSignature;
         private bool _isDisposed;
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
         private CngKey _key;
 
         internal enum KeyBlobMagicNumber
@@ -68,7 +68,7 @@ public override string ToString()
             return string.Format("ecdsa-sha2-nistp{0}", KeyLength);
         }
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
         /// <summary>
         /// Gets the HashAlgorithm to use.
         /// </summary>
@@ -153,7 +153,7 @@ public override BigInteger[] Public
                 byte[] curve;
                 byte[] qx;
                 byte[] qy;
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
                 var blob = _key.Export(CngKeyBlobFormat.EccPublicBlob);
 
                 KeyBlobMagicNumber magic;
@@ -221,7 +221,7 @@ public override BigInteger[] Public
         /// </summary>
         public byte[] PrivateKey { get; private set; }
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
         /// <summary>
         /// Gets the <see cref="ECDsa"/> object.
         /// </summary>
@@ -322,7 +322,7 @@ public EcdsaKey(byte[] data)
 
         private void Import(string curve_oid, byte[] publickey, byte[] privatekey)
         {
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
             KeyBlobMagicNumber curve_magic;
 
             switch (GetCurveName(curve_oid))
@@ -444,7 +444,7 @@ private static string GetCurveOid(string curve_s)
             }
         }
 
-#if NETFRAMEWORK
+#if NETFRAMEWORK && !NET47_OR_GREATER
         private static string GetCurveName(string oid)
         {
             switch (oid)
@@ -459,7 +459,7 @@ private static string GetCurveName(string oid)
                     throw new SshException("Unexpected OID: " + oid);
             }
         }
-#endif // NETFRAMEWORK
+#endif
 
         private static string OidByteArrayToString(byte[] oid)
         {