Build fixes.

src/libraries/Common/src/System/Net/NTAuthentication.Common.cs

@@ -352,15 +352,23 @@ internal int Encrypt(ReadOnlySpan<byte> buffer, [NotNull] ref byte[]? output, ui
             return NegotiateStreamPal.Encrypt(
                 _securityContext!,
                 buffer,
-                IsConfidentialityFlag,
+                (_contextFlags & ContextFlagsPal.Confidentiality) != 0,
                 IsNTLM,
                 ref output,
                 sequenceNumber);
         }
 
         internal int Decrypt(byte[] payload, int offset, int count, out int newOffset, uint expectedSeqNumber)
         {
-            return NegotiateStreamPal.Decrypt(_securityContext!, payload, offset, count, IsConfidentialityFlag, IsNTLM, out newOffset, expectedSeqNumber);
+            return NegotiateStreamPal.Decrypt(
+                _securityContext!,
+                payload,
+                offset,
+                count,
+                (_contextFlags & ContextFlagsPal.Confidentiality) != 0,
+                IsNTLM,
+                out newOffset,
+                expectedSeqNumber);
         }
     }
 }

src/libraries/Common/src/System/Net/Security/NegotiateStreamPal.Unix.cs

@@ -28,6 +28,11 @@ internal static partial class NegotiateStreamPal
         // defined in winerror.h
         private const int NTE_FAIL = unchecked((int)0x80090020);
 
+        internal static string QueryContextAssociatedName(SafeDeleteContext? securityContext)
+        {
+            throw new PlatformNotSupportedException(SR.net_nego_server_not_supported);
+        }
+
         internal static string QueryContextClientSpecifiedSpn(SafeDeleteContext securityContext)
         {
             throw new PlatformNotSupportedException(SR.net_nego_server_not_supported);

src/libraries/Common/src/System/Net/Security/NegotiateStreamPal.Windows.cs

@@ -55,6 +55,11 @@ internal static SafeFreeCredentials AcquireCredentialsHandle(string package, boo
             }
         }
 
+        internal static string? QueryContextAssociatedName(SafeDeleteContext securityContext)
+        {
+            return SSPIWrapper.QueryStringContextAttributes(GlobalSSPI.SSPIAuth, securityContext, Interop.SspiCli.ContextAttribute.SECPKG_ATTR_NAMES);
+        }
+
         internal static string? QueryContextClientSpecifiedSpn(SafeDeleteContext securityContext)
         {
             return SSPIWrapper.QueryStringContextAttributes(GlobalSSPI.SSPIAuth, securityContext, Interop.SspiCli.ContextAttribute.SECPKG_ATTR_CLIENT_SPECIFIED_TARGET);

src/libraries/System.Net.HttpListener/src/Resources/Strings.resx

@@ -131,6 +131,9 @@
   <data name="net_io_invalidendcall" xml:space="preserve">
     <value>{0} can only be called once for each asynchronous operation.</value>
   </data>
+  <data name="net_io_out_range" xml:space="preserve">
+    <value>The byte count must not exceed {0} bytes for this stream type.</value>
+  </data>
   <data name="net_listener_cannot_set_custom_cbt" xml:space="preserve">
     <value>Custom channel bindings are not supported.</value>
   </data>

src/libraries/System.Net.Mail/src/Resources/Strings.resx

@@ -64,6 +64,9 @@
   <data name="net_io_invalidendcall" xml:space="preserve">
     <value>{0} can only be called once for each asynchronous operation.</value>
   </data>
+  <data name="net_io_out_range" xml:space="preserve">
+    <value>The byte count must not exceed {0} bytes for this stream type.</value>
+  </data>
   <data name="net_MethodNotImplementedException" xml:space="preserve">
     <value>This method is not implemented by this class.</value>
   </data>

src/libraries/System.Net.Security/src/System/Net/Security/NegotiateStreamPal.Unix.cs

@@ -31,11 +31,6 @@ internal static IIdentity GetIdentity(NTAuthentication context)
             return new GenericIdentity(name, protocol);
         }
 
-        internal static string QueryContextAssociatedName(SafeDeleteContext? securityContext)
-        {
-            throw new PlatformNotSupportedException(SR.net_nego_server_not_supported);
-        }
-
         internal static void ValidateImpersonationLevel(TokenImpersonationLevel impersonationLevel)
         {
             if (impersonationLevel != TokenImpersonationLevel.Identification)

src/libraries/System.Net.Security/src/System/Net/Security/NegotiateStreamPal.Windows.cs

@@ -68,11 +68,6 @@ internal static IIdentity GetIdentity(NTAuthentication context)
             return result;
         }
 
-        internal static string? QueryContextAssociatedName(SafeDeleteContext securityContext)
-        {
-            return SSPIWrapper.QueryStringContextAttributes(GlobalSSPI.SSPIAuth, securityContext, Interop.SspiCli.ContextAttribute.SECPKG_ATTR_NAMES);
-        }
-
         internal static void ValidateImpersonationLevel(TokenImpersonationLevel impersonationLevel)
         {
             if (impersonationLevel != TokenImpersonationLevel.Identification &&