1 files changed, 30 insertions, 0 deletions
diff --git a/pg/src/main/java/org/spongycastle/openpgp/operator/PGPDataDecryptor.java b/pg/src/main/java/org/spongycastle/openpgp/operator/PGPDataDecryptor.java
new file mode 100644
index 00000000..ceeca672
--- /dev/null
+++ b/pg/src/main/java/org/spongycastle/openpgp/operator/PGPDataDecryptor.java
@@ -0,0 +1,30 @@
+package org.spongycastle.openpgp.operator;
+
+import java.io.InputStream;
+
+/**
+ * A decryptor that wraps a stream of PGP encrypted data to decrypt, and optionally integrity check,
+ * the data.
+ */
+public interface PGPDataDecryptor
+{
+    /**
+     * Wraps an encrypted data stream with a stream that will return the decrypted data.
+     *
+     * @param in the encrypted data.
+     * @return a decrypting stream.
+     */
+    InputStream getInputStream(InputStream in);
+
+    /**
+     * Obtains the block size of the encryption algorithm used in this decryptor.
+     *
+     * @return the block size of the cipher in bytes.
+     */
+    int getBlockSize();
+
+    /**
+     * Obtains the digest calculator used to verify the integrity check.
+     */
+    PGPDigestCalculator getIntegrityCalculator();
+}