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-rw-r--r--crypto/src/crypto/engines/IesEngine.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/crypto/engines/IesEngine.cs b/crypto/src/crypto/engines/IesEngine.cs
index 9139f3ffc..307cc7a80 100644
--- a/crypto/src/crypto/engines/IesEngine.cs
+++ b/crypto/src/crypto/engines/IesEngine.cs
@@ -98,7 +98,7 @@ namespace Org.BouncyCastle.Crypto.Engines
             kdf.Init(kParam);
 
             // Ensure that the length of the input is greater than the MAC in bytes
-            if (inLen <= mac.GetMacSize())
+            if (inLen < mac.GetMacSize())
                 throw new InvalidCipherTextException("Length of input must be greater than the MAC");
 
             inLen -= mac.GetMacSize();