1 files changed, 29 insertions, 5 deletions
diff --git a/src/pk_pad/emsa.h b/src/pk_pad/emsa.h
index 6d01beb7f..372eb836d 100644
--- a/src/pk_pad/emsa.h
+++ b/src/pk_pad/emsa.h
@@ -19,15 +19,39 @@ namespace Botan {
 class BOTAN_DLL EMSA
    {
    public:
-      virtual void update(const byte[], u32bit) = 0;
+      /**
+      * Add more data to the signature computation
+      * @param input some data
+      * @param length length of input in bytes
+      */
+      virtual void update(const byte input[], u32bit length) = 0;
+
+      /**
+      * @return raw hash
+      */
       virtual SecureVector<byte> raw_data() = 0;
 
-      virtual SecureVector<byte> encoding_of(const MemoryRegion<byte>&,
-                                             u32bit,
+      /**
+      * Return the encoding of a message
+      * @param msg the result of raw_data()
+      * @param output_bits the desired output bit size
+      * @param rng a random number generator
+      * @return encoded signature
+      */
+      virtual SecureVector<byte> encoding_of(const MemoryRegion<byte>& msg,
+                                             u32bit output_bits,
                                              RandomNumberGenerator& rng) = 0;
 
-      virtual bool verify(const MemoryRegion<byte>&, const MemoryRegion<byte>&,
-                          u32bit) = 0;
+      /**
+      * Verify the encoding
+      * @param coded the received (coded) message representative
+      * @param raw the computed (local, uncoded) message representative
+      * @param key_bits the size of the key in bits
+      * @return true if coded is a valid encoding of raw, otherwise false
+      */
+      virtual bool verify(const MemoryRegion<byte>& coded,
+                          const MemoryRegion<byte>& raw,
+                          u32bit key_bits) = 0;
       virtual ~EMSA() {}
    };