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-rw-r--r--crypto/test/src/crypto/prng/test/TestEntropySourceProvider.cs12
1 files changed, 12 insertions, 0 deletions
diff --git a/crypto/test/src/crypto/prng/test/TestEntropySourceProvider.cs b/crypto/test/src/crypto/prng/test/TestEntropySourceProvider.cs
index 647799630..9ebbb7ccd 100644
--- a/crypto/test/src/crypto/prng/test/TestEntropySourceProvider.cs
+++ b/crypto/test/src/crypto/prng/test/TestEntropySourceProvider.cs
@@ -48,6 +48,18 @@ namespace Org.BouncyCastle.Crypto.Prng.Test
                 return rv;
             }
 
+            // NOTE: .NET Core 2.1 has Span<T>, but is tested against our .NET Standard 2.0 assembly.
+//#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+#if NET6_0_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+            int IEntropySource.GetEntropy(Span<byte> output)
+            {
+                int length = bitsRequired / 8;
+                data.AsSpan(index, length).CopyTo(output);
+                index += length;
+                return length;
+            }
+#endif
+
             public int EntropySize
             {
                 get { return bitsRequired; }