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path: root/crypto/src/crypto/IEntropySource.cs
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-rw-r--r--crypto/src/crypto/IEntropySource.cs4
1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/src/crypto/IEntropySource.cs b/crypto/src/crypto/IEntropySource.cs
index 62e3bc76c..2e088ed27 100644
--- a/crypto/src/crypto/IEntropySource.cs
+++ b/crypto/src/crypto/IEntropySource.cs
@@ -19,6 +19,10 @@ namespace Org.BouncyCastle.Crypto
 		/// <returns>The entropy bytes.</returns>
 		byte[] GetEntropy();
 
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+        int GetEntropy(Span<byte> output);
+#endif
+
 		/// <summary>
 		/// Return the number of bits of entropy this source can produce.
 		/// </summary>