Enable DSA tests (#1181)

Co-authored-by: Wojciech Nagórski <wojtpl2@gmail.com>

README.md

@@ -97,6 +97,8 @@ Private keys can be encrypted using one of the following cipher methods:
 * ecdsa-sha2-nistp256
 * ecdsa-sha2-nistp384
 * ecdsa-sha2-nistp521
+* rsa-sha2-512
+* rsa-sha2-256
 * ssh-rsa
 * ssh-dss
 

src/Renci.SshNet.IntegrationTests/HostKeyAlgorithmTests.cs

@@ -24,12 +24,9 @@ namespace Renci.SshNet.IntegrationTests
         }
 
         [TestMethod]
-        [Ignore] // No longer supported in recent versions of OpenSSH
-        // TODO: We should be able to enable some legacy settings to make it work
-        // https://www.openssh.com/legacy.html e.g. PubkeyAcceptedKeyTypes / HostbasedAcceptedKeyTypes ?
-        public void SshDsa()
+        public void SshDss()
         {
-            DoTest(HostKeyAlgorithm.SshDsa, HostKeyFile.Dsa, 1024);
+            DoTest(HostKeyAlgorithm.SshDss, HostKeyFile.Dsa, 2048);
         }
 
         [TestMethod]

src/Renci.SshNet.IntegrationTests/HostKeyFile.cs

@@ -3,7 +3,7 @@
     public sealed class HostKeyFile
     {
         public static readonly HostKeyFile Rsa = new HostKeyFile("ssh-rsa", "/etc/ssh/ssh_host_rsa_key", new byte[] { 0x3d, 0x90, 0xd8, 0x0d, 0xd5, 0xe0, 0xb6, 0x13, 0x42, 0x7c, 0x78, 0x1e, 0x19, 0xa3, 0x99, 0x2b });
-        public static readonly HostKeyFile Dsa = new HostKeyFile("ssh-dsa", "/etc/ssh/ssh_host_dsa_key", new byte[] { 0x3d, 0x90, 0xd8, 0x0d, 0xd5, 0xe0, 0xb6, 0x13, 0x42, 0x7c, 0x78, 0x1e, 0x19, 0xa3, 0x99, 0x2b });
+        public static readonly HostKeyFile Dsa = new HostKeyFile("ssh-dsa", "/etc/ssh/ssh_host_dsa_key", new byte[] { 0x50, 0xe0, 0xd5, 0x11, 0xf7, 0xed, 0x54, 0x75, 0x0d, 0x03, 0xc6, 0x52, 0x9b, 0x3b, 0x3c, 0x9f });
         public static readonly HostKeyFile Ed25519 = new HostKeyFile("ssh-ed25519", "/etc/ssh/ssh_host_ed25519_key", new byte[] { 0xb3, 0xb9, 0xd0, 0x1b, 0x73, 0xc4, 0x60, 0xb4, 0xce, 0xed, 0x06, 0xf8, 0x58, 0x49, 0xa3, 0xda });
         public const string Ecdsa = "/etc/ssh/ssh_host_ecdsa_key";
 

src/Renci.SshNet.IntegrationTests/PrivateKeyAuthenticationTests.cs

@@ -23,10 +23,7 @@ namespace Renci.SshNet.IntegrationTests
         }
 
         [TestMethod]
-        [Ignore] // No longer supported in recent versions of OpenSSH
-        // TODO: We should be able to enable some legacy settings to make it work
-        // https://www.openssh.com/legacy.html e.g. PubkeyAcceptedKeyTypes / HostbasedAcceptedKeyTypes ?
-        public void SshDsa()
+        public void SshDss()
         {
             DoTest(PublicKeyAlgorithm.SshDss, "id_dsa");
         }

src/Renci.SshNet.IntegrationTests/server/ssh/ssh_host_dsa_key

@@ -0,0 +1,20 @@
+-----BEGIN DSA PRIVATE KEY-----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+-----END DSA PRIVATE KEY-----

src/Renci.SshNet.IntegrationTests/user/sshnet/authorized_keys

@@ -3,3 +3,4 @@ ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPzzrPpI
 ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBLSsu/HNKiaALhQ26UDv+N0AFdMb26fMVrOKe866CGu6ajSf9HUOhJFdjhseihB2rTalMPr8MrcXNLufii4mL8u4l9fUQXFgwnM/ZpiVPSs6C+8i4u/ZDg7Nx2NXybNIgQ==
 ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBACB4WgRgGBRo6Uk+cRgg8tJPCbEtGURRWlUA7PDDerXR+P9O6mm3L99Etxsyh5XNYqXyaMNtH5c51ooMajrFwcayAHIhPPb8X3CsTwEfIUQ96aDyHQMotbRfnkn6uefeUTRrSNcqeAndUtVyAqBdqbsq2mgJYXHrz2NUKlPFYgauQi+WQ==
 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAkNGPVOTuzuKTgGfHcve2MRj57yXhmZgkUyi9RpmJrl
+ssh-dss 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

src/Renci.SshNet.TestTools.OpenSSH/HostKeyAlgorithm.cs

@@ -16,7 +16,7 @@
 		public static readonly HostKeyAlgorithm RsaSha2512 = new HostKeyAlgorithm("rsa-sha2-512");
 		public static readonly HostKeyAlgorithm RsaSha2256 = new HostKeyAlgorithm("rsa-sha2-256");
 		public static readonly HostKeyAlgorithm SshRsa = new HostKeyAlgorithm("ssh-rsa");
-        public static readonly HostKeyAlgorithm SshDsa = new HostKeyAlgorithm("ssh-dsa");
+        public static readonly HostKeyAlgorithm SshDss = new HostKeyAlgorithm("ssh-dss");
 
         public HostKeyAlgorithm(string name)
         {