1 files changed, 29 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/InputDecryptor.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/InputDecryptor.java
new file mode 100644
index 000000000..c55b3db05
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/InputDecryptor.java
@@ -0,0 +1,29 @@
+package org.spongycastle.operator;
+
+import java.io.InputStream;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+
+/**
+ * General interface for an operator that is able to produce
+ * an InputStream that will decrypt a stream of encrypted data.
+ */
+public interface InputDecryptor
+{
+    /**
+     * Return the algorithm identifier describing the encryption
+     * algorithm and parameters this decryptor can process.
+     *
+     * @return algorithm oid and parameters.
+     */
+    AlgorithmIdentifier getAlgorithmIdentifier();
+
+    /**
+     * Wrap the passed in input stream encIn, returning an input stream
+     * that decrypts what it reads from encIn before returning it.
+     *
+     * @param encIn InputStream containing encrypted input.
+     * @return an decrypting InputStream
+     */
+    InputStream getInputStream(InputStream encIn);
+}