done

Netch/3rd/DnsClient.NET/Protocol/SshfpRecord.cs

@@ -0,0 +1,101 @@
+namespace DnsClient.Protocol
+{
+    /// <summary>
+    /// A <see cref="DnsResourceRecord"/> represending an SSH fingerprint
+    /// <para>
+    /// SSHFP RRs are used to hold SSH fingerprints. Upon connecting to a
+    /// host an SSH client may choose to query for this to check the fingerprint(s)
+    /// </para>
+    /// </summary>
+    /// <seealso href="https://tools.ietf.org/html/rfc4255">RFC 4255</seealso>
+    /// <seealso href="https://tools.ietf.org/html/rfc6594">RFC 6594</seealso>
+    /// <seealso href="https://tools.ietf.org/html/rfc7479">RFC 7479</seealso>
+    public class SshfpRecord : DnsResourceRecord
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="info">The information.</param>
+        /// <param name="algorithm">The algorithm.</param>
+        /// <param name="fingerprintType">The fingerprint type.</param>
+        /// <param name="fingerprint">The fingerprint.</param>
+        public SshfpRecord(ResourceRecordInfo info, SshfpAlgorithm algorithm, SshfpFingerprintType fingerprintType, string fingerprint) : base(info)
+        {
+            Algorithm = algorithm;
+            FingerprintType = fingerprintType;
+            Fingerprint = fingerprint;
+        }
+
+        /// <summary>
+        /// Algorithm used for the fingerprint
+        /// </summary>
+        public SshfpAlgorithm Algorithm { get; }
+
+        /// <summary>
+        /// Fingerprint type used for the fingerprint
+        /// </summary>
+        public SshfpFingerprintType FingerprintType { get; }
+
+        /// <summary>
+        /// Fingerprint as defined in the RR
+        /// </summary>
+        public string Fingerprint { get; }
+
+        private protected override string RecordToString()
+        {
+            return $"{(int)Algorithm} {(int)FingerprintType} {Fingerprint}";
+        }
+    }
+
+    /// <summary>
+    /// Algorithm used by <see cref="SshfpRecord"/>
+    /// </summary>
+    public enum SshfpAlgorithm
+    {
+        /// <summary>
+        /// Reserved for later use
+        /// </summary>
+        Reserved = 0,
+
+        /// <summary>
+        /// RSA
+        /// </summary>
+        RSA = 1,
+
+        /// <summary>
+        /// DSS
+        /// </summary>
+        DSS = 2,
+
+        /// <summary>
+        /// Eliptic Curve DSA
+        /// </summary>
+        ECDSA = 3,
+
+        /// <summary>
+        /// Edwards-curve DSA
+        /// </summary>
+        Ed25519 = 4,
+    }
+
+    /// <summary>
+    /// Fingerprint type used by <see cref="SshfpRecord"/>
+    /// </summary>
+    public enum SshfpFingerprintType
+    {
+        /// <summary>
+        /// Reserved for later use
+        /// </summary>
+        Reserved = 0,
+
+        /// <summary>
+        /// SHA-1 fingerprint
+        /// </summary>
+        SHA1 = 1,
+
+        /// <summary>
+        /// SHA-256 fingerprint
+        /// </summary>
+        SHA256 = 2,
+    }
+}