Make XMSS more friendly about invalid params.

Previously just throw an exception from map.at

Add an XMSS keygen test, and add default params for create_private_key

4 files changed, 53 insertions, 30 deletions

diff --git a/src/lib/pubkey/xmss/xmss_parameters.cpp b/src/lib/pubkey/xmss/xmss_parameters.cpp
index f1f3281cf..c55b25a27 100644
--- a/src/lib/pubkey/xmss/xmss_parameters.cpp
+++ b/src/lib/pubkey/xmss/xmss_parameters.cpp
@@ -16,26 +16,41 @@
 
 namespace Botan {
 
-const std::map<std::string, XMSS_Parameters::xmss_algorithm_t>
-   XMSS_Parameters::m_oid_name_lut =
-      {
-      { "XMSS_SHA2-256_W16_H10", XMSS_SHA2_256_W16_H10 },
-      { "XMSS_SHA2-256_W16_H16", XMSS_SHA2_256_W16_H16 },
-      { "XMSS_SHA2-256_W16_H20", XMSS_SHA2_256_W16_H20 },
-      { "XMSS_SHA2-512_W16_H10", XMSS_SHA2_512_W16_H10 },
-      { "XMSS_SHA2-512_W16_H16", XMSS_SHA2_512_W16_H16 },
-      { "XMSS_SHA2-512_W16_H20", XMSS_SHA2_512_W16_H20 },
-      { "XMSS_SHAKE128_W16_H10", XMSS_SHAKE128_W16_H10 },
-      { "XMSS_SHAKE128_W16_H16", XMSS_SHAKE128_W16_H16 },
-      { "XMSS_SHAKE128_W16_H20", XMSS_SHAKE128_W16_H20 },
-      { "XMSS_SHAKE256_W16_H10", XMSS_SHAKE256_W16_H10 },
-      { "XMSS_SHAKE256_W16_H16", XMSS_SHAKE256_W16_H16 },
-      { "XMSS_SHAKE256_W16_H20", XMSS_SHAKE256_W16_H20 }
-      };
+//static
+XMSS_Parameters::xmss_algorithm_t XMSS_Parameters::xmss_id_from_string(const std::string& param_set)
+   {
+   if(param_set == "XMSS_SHA2-256_W16_H10")
+      return XMSS_SHA2_256_W16_H10;
+   if(param_set == "XMSS_SHA2-256_W16_H16")
+      return XMSS_SHA2_256_W16_H16;
+   if(param_set == "XMSS_SHA2-256_W16_H20")
+      return XMSS_SHA2_256_W16_H20;
+   if(param_set == "XMSS_SHA2-512_W16_H10")
+      return XMSS_SHA2_512_W16_H10;
+   if(param_set == "XMSS_SHA2-512_W16_H16")
+      return XMSS_SHA2_512_W16_H16;
+   if(param_set == "XMSS_SHA2-512_W16_H20")
+      return XMSS_SHA2_512_W16_H20;
+   if(param_set == "XMSS_SHAKE128_W16_H10")
+      return XMSS_SHAKE128_W16_H10;
+   if(param_set == "XMSS_SHAKE128_W16_H16")
+      return XMSS_SHAKE128_W16_H16;
+   if(param_set == "XMSS_SHAKE128_W16_H20")
+      return XMSS_SHAKE128_W16_H20;
+   if(param_set == "XMSS_SHAKE256_W16_H10")
+      return XMSS_SHAKE256_W16_H10;
+   if(param_set == "XMSS_SHAKE256_W16_H16")
+      return XMSS_SHAKE256_W16_H16;
+   if(param_set == "XMSS_SHAKE256_W16_H20")
+      return XMSS_SHAKE256_W16_H20;
+   throw Invalid_Argument("Unknown XMSS algorithm param '" + param_set + "'");
+   }
+
+XMSS_Parameters::XMSS_Parameters(const std::string& param_set)
+   : XMSS_Parameters(XMSS_Parameters::xmss_id_from_string(param_set))
+   {
+   }
 
-XMSS_Parameters::XMSS_Parameters(const std::string& algo_name)
-   : XMSS_Parameters(m_oid_name_lut.at(algo_name))
-   {}
 
 XMSS_Parameters::XMSS_Parameters(xmss_algorithm_t oid)
    : m_oid(oid)
diff --git a/src/lib/pubkey/xmss/xmss_parameters.h b/src/lib/pubkey/xmss/xmss_parameters.h
index 7a83af381..1e8048217 100644
--- a/src/lib/pubkey/xmss/xmss_parameters.h
+++ b/src/lib/pubkey/xmss/xmss_parameters.h
@@ -44,6 +44,8 @@ class BOTAN_DLL XMSS_Parameters
          XMSS_SHAKE256_W16_H20 = 0x0c00000c
          };
 
+      static xmss_algorithm_t xmss_id_from_string(const std::string& algo_name);
+
       XMSS_Parameters(const std::string& algo_name);
       XMSS_Parameters(xmss_algorithm_t oid);
 
@@ -106,8 +108,6 @@ class BOTAN_DLL XMSS_Parameters
          }
 
    private:
-      static const std::map<std::string, xmss_algorithm_t>
-         m_oid_name_lut;
       xmss_algorithm_t m_oid;
       XMSS_WOTS_Parameters::ots_algorithm_t m_wots_oid;
       std::string m_name;
diff --git a/src/lib/pubkey/xmss/xmss_wots_parameters.cpp b/src/lib/pubkey/xmss/xmss_wots_parameters.cpp
index 274da8d31..3a1c1902d 100644
--- a/src/lib/pubkey/xmss/xmss_wots_parameters.cpp
+++ b/src/lib/pubkey/xmss/xmss_wots_parameters.cpp
@@ -17,17 +17,23 @@
 
 namespace Botan {
 
-const std::map<std::string, XMSS_WOTS_Parameters::ots_algorithm_t>
-   XMSS_WOTS_Parameters::m_oid_name_lut =
+//static
+XMSS_WOTS_Parameters::ots_algorithm_t
+XMSS_WOTS_Parameters::xmss_wots_id_from_string(const std::string& param_set)
    {
-   { "WOTSP_SHA2-256_W16", WOTSP_SHA2_256_W16 },
-   { "WOTSP_SHA2-512_W16", WOTSP_SHA2_512_W16 },
-   { "WOTSP_SHAKE128_W16", WOTSP_SHAKE128_W16 },
-   { "WOTSP_SHAKE256_W16", WOTSP_SHAKE256_W16 }
-   };
+   if(param_set == "WOTSP_SHA2-256_W16")
+      return WOTSP_SHA2_256_W16;
+   if(param_set == "WOTSP_SHA2-512_W16")
+      return WOTSP_SHA2_512_W16;
+   if(param_set == "WOTSP_SHAKE128_W16")
+      return WOTSP_SHAKE128_W16;
+   if(param_set == "WOTSP_SHAKE256_W16")
+      return WOTSP_SHAKE256_W16;
+   throw Invalid_Argument("Unknown XMSS-WOTS algorithm param '" + param_set + "'");
+   }
 
-XMSS_WOTS_Parameters::XMSS_WOTS_Parameters(const std::string& algo_name)
-   : XMSS_WOTS_Parameters(m_oid_name_lut.at(algo_name))
+XMSS_WOTS_Parameters::XMSS_WOTS_Parameters(const std::string& param_set)
+   : XMSS_WOTS_Parameters(xmss_wots_id_from_string(param_set))
    {}
 
 XMSS_WOTS_Parameters::XMSS_WOTS_Parameters(ots_algorithm_t oid)
diff --git a/src/lib/pubkey/xmss/xmss_wots_parameters.h b/src/lib/pubkey/xmss/xmss_wots_parameters.h
index 15644a257..cc89c3d4a 100644
--- a/src/lib/pubkey/xmss/xmss_wots_parameters.h
+++ b/src/lib/pubkey/xmss/xmss_wots_parameters.h
@@ -45,6 +45,8 @@ class XMSS_WOTS_Parameters
       XMSS_WOTS_Parameters(const std::string& algo_name);
       XMSS_WOTS_Parameters(ots_algorithm_t ots_spec);
 
+      static ots_algorithm_t xmss_wots_id_from_string(const std::string& param_set);
+
       /**
        * Algorithm 1: convert input string to base.
        *