1 files changed, 27 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/eac/operator/EACSigner.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/eac/operator/EACSigner.java
new file mode 100644
index 000000000..9a53685a2
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/eac/operator/EACSigner.java
@@ -0,0 +1,27 @@
+package org.spongycastle.eac.operator;
+
+import java.io.OutputStream;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+
+public interface EACSigner
+{
+    ASN1ObjectIdentifier getUsageIdentifier();
+
+    /**
+     * Returns a stream that will accept data for the purpose of calculating
+     * a signature. Use org.spongycastle.util.io.TeeOutputStream if you want to accumulate
+     * the data on the fly as well.
+     *
+     * @return an OutputStream
+     */
+    OutputStream getOutputStream();
+
+    /**
+     * Returns a signature based on the current data written to the stream, since the
+     * start or the last call to getSignature().
+     *
+     * @return bytes representing the signature.
+     */
+    byte[] getSignature();
+}