1 files changed, 37 insertions, 0 deletions
diff --git a/Crypto/src/crypto/ISignerWithRecovery.cs b/Crypto/src/crypto/ISignerWithRecovery.cs
new file mode 100644
index 000000000..024f5cef5
--- /dev/null
+++ b/Crypto/src/crypto/ISignerWithRecovery.cs
@@ -0,0 +1,37 @@
+using System;
+using System.Text;
+
+namespace Org.BouncyCastle.Crypto
+{
+    /**
+     * Signer with message recovery.
+     */
+    public interface ISignerWithRecovery
+        : ISigner
+    {
+        /**
+         * Returns true if the signer has recovered the full message as
+         * part of signature verification.
+         *
+         * @return true if full message recovered.
+         */
+        bool HasFullMessage();
+
+        /**
+         * Returns a reference to what message was recovered (if any).
+         *
+         * @return full/partial message, null if nothing.
+         */
+        byte[] GetRecoveredMessage();
+
+		/**
+		 * Perform an update with the recovered message before adding any other data. This must
+		 * be the first update method called, and calling it will result in the signer assuming
+		 * that further calls to update will include message content past what is recoverable.
+		 *
+		 * @param signature the signature that we are in the process of verifying.
+		 * @throws IllegalStateException
+		 */
+		void UpdateWithRecoveredMessage(byte[] signature);
+	}
+}