4 files changed, 38 insertions, 1 deletions
diff --git a/crypto/src/crmf/PKMacBuilder.cs b/crypto/src/crmf/PKMacBuilder.cs
index 156936eac..8093eab44 100644
--- a/crypto/src/crmf/PKMacBuilder.cs
+++ b/crypto/src/crmf/PKMacBuilder.cs
@@ -83,6 +83,15 @@ namespace Org.BouncyCastle.Crmf
             signature.CopyTo(sig, sigOff);
             return signature.Length;
         }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+        public int Collect(Span<byte> destination)
+        {
+            byte[] result = Collect();
+            result.AsSpan().CopyTo(destination);
+            return result.Length;
+        }
+#endif
     }
 
     public class PKMacBuilder
diff --git a/crypto/src/crypto/IBlockResult.cs b/crypto/src/crypto/IBlockResult.cs
index 0f054fedc..3ed96a7c1 100644
--- a/crypto/src/crypto/IBlockResult.cs
+++ b/crypto/src/crypto/IBlockResult.cs
@@ -1,4 +1,5 @@
-
+using System;
+
 namespace Org.BouncyCastle.Crypto
 {
     /// <summary>
@@ -20,5 +21,14 @@ namespace Org.BouncyCastle.Crypto
         /// <param name="destination">The byte array to copy the result into.</param>
         /// <param name="offset">The offset into destination to start copying the result at.</param>
         int Collect(byte[] destination, int offset);
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+        /// <summary>
+        /// Store the final result of the operation by copying it into the destination span.
+        /// </summary>
+        /// <returns>The number of bytes copied into destination.</returns>
+        /// <param name="destination">The span to copy the result into.</param>
+        int Collect(Span<byte> destination);
+#endif
     }
 }
diff --git a/crypto/src/crypto/SimpleBlockResult.cs b/crypto/src/crypto/SimpleBlockResult.cs
index 6cacda63f..a653b0a91 100644
--- a/crypto/src/crypto/SimpleBlockResult.cs
+++ b/crypto/src/crypto/SimpleBlockResult.cs
@@ -49,5 +49,14 @@ namespace Org.BouncyCastle.Crypto
 
             return result.Length;
         }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+        public int Collect(Span<byte> destination)
+        {
+            result.AsSpan().CopyTo(destination);
+
+            return result.Length;
+        }
+#endif
     }
 }
diff --git a/crypto/src/crypto/operators/DefaultSignatureResult.cs b/crypto/src/crypto/operators/DefaultSignatureResult.cs
index 615f67dcb..fe47d792b 100644
--- a/crypto/src/crypto/operators/DefaultSignatureResult.cs
+++ b/crypto/src/crypto/operators/DefaultSignatureResult.cs
@@ -23,5 +23,14 @@ namespace Org.BouncyCastle.Crypto.Operators
             signature.CopyTo(sig, sigOff);
             return signature.Length;
         }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+        public int Collect(Span<byte> destination)
+        {
+            byte[] result = Collect();
+            result.AsSpan().CopyTo(destination);
+            return result.Length;
+        }
+#endif
     }
 }