Add is_passhash9_alg_supported()

2 files changed, 15 insertions, 0 deletions

diff --git a/src/lib/passhash/passhash9/passhash9.cpp b/src/lib/passhash/passhash9/passhash9.cpp
index fef23515b..e78ac5012 100644
--- a/src/lib/passhash/passhash9/passhash9.cpp
+++ b/src/lib/passhash/passhash9/passhash9.cpp
@@ -127,4 +127,13 @@ bool check_passhash9(const std::string& pass, const std::string& hash)
                    PASSHASH9_PBKDF_OUTPUT_LEN);
    }
 
+bool is_passhash9_alg_supported(uint8_t alg_id)
+   {
+   if (get_pbkdf_prf(alg_id))
+      {
+      return true;
+      }
+   return false;
+   }
+
 }
diff --git a/src/lib/passhash/passhash9/passhash9.h b/src/lib/passhash/passhash9/passhash9.h
index d2282481d..80cbb939a 100644
--- a/src/lib/passhash/passhash9/passhash9.h
+++ b/src/lib/passhash/passhash9/passhash9.h
@@ -38,6 +38,12 @@ std::string BOTAN_DLL generate_passhash9(const std::string& password,
 bool BOTAN_DLL check_passhash9(const std::string& password,
                                const std::string& hash);
 
+/**
+* Check if the PRF used with PBKDF2 is supported
+* @param alg_id alg_id used in generate_passhash9()
+*/
+bool BOTAN_DLL is_passhash9_alg_supported(uint8_t alg_id);
+
 }
 
 #endif