1 files changed, 14 insertions, 4 deletions
diff --git a/src/pk_pad/hash_id/hash_id.h b/src/pk_pad/hash_id/hash_id.h
index 847d9106c..909cc6b19 100644
--- a/src/pk_pad/hash_id/hash_id.h
+++ b/src/pk_pad/hash_id/hash_id.h
@@ -13,11 +13,21 @@
 
 namespace Botan {
 
-/*
-* Return the values of various defined HashIDs
+/**
+* Return the PKCS #1 hash identifier
+* @see RFC 3447 section 9.2
+* @param hash_name the name of the hash function
+* @return byte sequence identifying the hash
+* @throw Invalid_Argument if the hash has no known PKCS #1 hash id
+*/
+BOTAN_DLL MemoryVector<byte> pkcs_hash_id(const std::string& hash_name);
+
+/**
+* Return the IEEE 1363 hash identifier
+* @param hash_name the name of the hash function
+* @return byte code identifying the hash, or 0 if not known
 */
-BOTAN_DLL MemoryVector<byte> pkcs_hash_id(const std::string&);
-BOTAN_DLL byte ieee1363_hash_id(const std::string&);
+BOTAN_DLL byte ieee1363_hash_id(const std::string& hash_name);
 
 }