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-rw-r--r--crypto/src/tls/crypto/impl/bc/BcTlsDHDomain.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/tls/crypto/impl/bc/BcTlsDHDomain.cs b/crypto/src/tls/crypto/impl/bc/BcTlsDHDomain.cs
index faf6b4576..6a947c23b 100644
--- a/crypto/src/tls/crypto/impl/bc/BcTlsDHDomain.cs
+++ b/crypto/src/tls/crypto/impl/bc/BcTlsDHDomain.cs
@@ -24,7 +24,7 @@ namespace Org.BouncyCastle.Tls.Crypto.Impl.BC
 
         private static int GetValueLength(DHParameters dh)
         {
-            return (dh.P.BitLength + 7) / 8;
+            return BigIntegers.GetUnsignedByteLength(dh.P);
         }
 
         public static BcTlsSecret CalculateDHAgreement(BcTlsCrypto crypto, DHPrivateKeyParameters privateKey,