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-rw-r--r--crypto/src/crypto/encodings/OaepEncoding.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/crypto/encodings/OaepEncoding.cs b/crypto/src/crypto/encodings/OaepEncoding.cs
index 95814ef25..cb23b1710 100644
--- a/crypto/src/crypto/encodings/OaepEncoding.cs
+++ b/crypto/src/crypto/encodings/OaepEncoding.cs
@@ -273,7 +273,7 @@ namespace Org.BouncyCastle.Crypto.Encodings
                 }
             }
 
-            if (start >= (block.Length - 1) || block[start] != 1)
+            if (start > (block.Length - 1) || block[start] != 1)
             {
                 throw new InvalidCipherTextException("data start wrong " + start);
             }