1 files changed, 6 insertions, 4 deletions
diff --git a/crypto/src/asn1/ConstructedBitStream.cs b/crypto/src/asn1/ConstructedBitStream.cs
index 7c9e7c9e4..49f54fc1b 100644
--- a/crypto/src/asn1/ConstructedBitStream.cs
+++ b/crypto/src/asn1/ConstructedBitStream.cs
@@ -29,9 +29,11 @@ namespace Org.BouncyCastle.Asn1
             get { return m_padBits; }
         }
 
-        public override int Read(byte[] buf, int off, int len)
+        public override int Read(byte[] buffer, int offset, int count)
         {
-            if (len < 1)
+            Streams.ValidateBufferArguments(buffer, offset, count);
+
+            if (count < 1)
                 return 0;
 
             if (m_currentStream == null)
@@ -51,13 +53,13 @@ namespace Org.BouncyCastle.Asn1
 
             for (;;)
             {
-                int numRead = m_currentStream.Read(buf, off + totalRead, len - totalRead);
+                int numRead = m_currentStream.Read(buffer, offset + totalRead, count - totalRead);
 
                 if (numRead > 0)
                 {
                     totalRead += numRead;
 
-                    if (totalRead == len)
+                    if (totalRead == count)
                         return totalRead;
                 }
                 else