1 files changed, 31 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/ContentVerifier.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/ContentVerifier.java
new file mode 100644
index 000000000..a139ebb2e
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/ContentVerifier.java
@@ -0,0 +1,31 @@
+package org.spongycastle.operator;
+
+import java.io.OutputStream;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+
+public interface ContentVerifier
+{
+    /**
+     * Return the algorithm identifier describing the signature
+     * algorithm and parameters this expander supports.
+     *
+     * @return algorithm oid and parameters.
+     */
+    AlgorithmIdentifier getAlgorithmIdentifier();
+
+    /**
+     * Returns a stream that will accept data for the purpose of calculating
+     * a signature for later verification. Use org.spongycastle.util.io.TeeOutputStream if you want to accumulate
+     * the data on the fly as well.
+     *
+     * @return an OutputStream
+     */
+    OutputStream getOutputStream();
+
+    /**
+     * @param expected expected value of the signature on the data.
+     * @return true if the signature verifies, false otherwise
+     */
+    boolean verify(byte[] expected);
+}
+\ No newline at end of file