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authorPeter Dettman <peter.dettman@bouncycastle.org>2022-08-01 17:27:58 +0700
committerPeter Dettman <peter.dettman@bouncycastle.org>2022-08-01 17:27:58 +0700
commit6fd2fc61dd607475c367d3ee828c659a1651eb4e (patch)
tree6349d86f8723158e1cb43c73e0cb810f1ea3201a /crypto/src/tls
parentMake nextUpdate nullable (diff)
downloadBouncyCastle.NET-ed25519-6fd2fc61dd607475c367d3ee828c659a1651eb4e.tar.xz
TLS: 'tls-exporter' channel binding
- defined in RFC 9266
- see https://github.com/bcgit/bc-java/issues/1198
Diffstat (limited to 'crypto/src/tls')
-rw-r--r--crypto/src/tls/AbstractTlsContext.cs3
-rw-r--r--crypto/src/tls/ChannelBinding.cs5
2 files changed, 8 insertions, 0 deletions
diff --git a/crypto/src/tls/AbstractTlsContext.cs b/crypto/src/tls/AbstractTlsContext.cs
index be7a67dfc..a5ac85962 100644
--- a/crypto/src/tls/AbstractTlsContext.cs
+++ b/crypto/src/tls/AbstractTlsContext.cs
@@ -170,6 +170,9 @@ namespace Org.BouncyCastle.Tls
 
             SecurityParameters securityParameters = SecurityParameters;
 
+            if (ChannelBinding.tls_exporter == channelBinding)
+                return ExportKeyingMaterial("EXPORTER-Channel-Binding", TlsUtilities.EmptyBytes, 32);
+
             if (TlsUtilities.IsTlsV13(securityParameters.NegotiatedVersion))
                 return null;
 
diff --git a/crypto/src/tls/ChannelBinding.cs b/crypto/src/tls/ChannelBinding.cs
index 84f8bc4df..d6e0cbe27 100644
--- a/crypto/src/tls/ChannelBinding.cs
+++ b/crypto/src/tls/ChannelBinding.cs
@@ -15,5 +15,10 @@ namespace Org.BouncyCastle.Tls
         public const int tls_server_end_point = 0;
         public const int tls_unique = 1;
         public const int tls_unique_for_telnet = 2;
+
+        /*
+         * RFC 9266
+         */
+        public const int tls_exporter = 3;
     }
 }