1 files changed, 24 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/operator/DigestAlgorithmIdentifierFinder.java b/pkix/src/main/java/org/spongycastle/operator/DigestAlgorithmIdentifierFinder.java
new file mode 100644
index 00000000..1254c38e
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/operator/DigestAlgorithmIdentifierFinder.java
@@ -0,0 +1,24 @@
+package org.spongycastle.operator;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+
+public interface DigestAlgorithmIdentifierFinder
+{
+    /**
+     * Find the digest algorithm identifier that matches with
+     * the passed in signature algorithm identifier.
+     *
+     * @param sigAlgId the signature algorithm of interest.
+     * @return an algorithm identifier for the corresponding digest.
+     */
+    AlgorithmIdentifier find(AlgorithmIdentifier sigAlgId);
+
+    /**
+     * Find the algorithm identifier that matches with
+     * the passed in digest name.
+     *
+     * @param digAlgName the name of the digest algorithm of interest.
+     * @return an algorithm identifier for the digest signature.
+     */
+    AlgorithmIdentifier find(String digAlgName);
+}
+\ No newline at end of file