1 files changed, 34 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/ContentVerifierProvider.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/ContentVerifierProvider.java
new file mode 100644
index 000000000..9d91304a9
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/ContentVerifierProvider.java
@@ -0,0 +1,34 @@
+package org.spongycastle.operator;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.cert.X509CertificateHolder;
+
+/**
+ * General interface for providers of ContentVerifier objects.
+ */
+public interface ContentVerifierProvider
+{
+    /**
+     * Return whether or not this verifier has a certificate associated with it.
+     *
+     * @return true if there is an associated certificate, false otherwise.
+     */
+    boolean hasAssociatedCertificate();
+
+    /**
+     * Return the associated certificate if there is one.
+     *
+     * @return a holder containing the associated certificate if there is one, null if there is not.
+     */
+    X509CertificateHolder getAssociatedCertificate();
+
+    /**
+     * Return a ContentVerifier that matches the passed in algorithm identifier,
+     *
+     * @param verifierAlgorithmIdentifier the algorithm and parameters required.
+     * @return a matching ContentVerifier
+     * @throws OperatorCreationException if the required ContentVerifier cannot be created.
+     */
+    ContentVerifier get(AlgorithmIdentifier verifierAlgorithmIdentifier)
+        throws OperatorCreationException;
+}