1 files changed, 21 insertions, 0 deletions
diff --git a/src/pubkey/dsa/dsa.h b/src/pubkey/dsa/dsa.h
index e0aab1b52..68ae34235 100644
--- a/src/pubkey/dsa/dsa.h
+++ b/src/pubkey/dsa/dsa.h
@@ -83,6 +83,27 @@ class BOTAN_DLL DSA_Signature_Operation : public PK_Ops::Signature_Operation
       Modular_Reducer mod_q;
    };
 
+class BOTAN_DLL DSA_Verification_Operation : public PK_Ops::Verification
+   {
+   public:
+      DSA_Verification_Operation(const DSA_PublicKey& dsa);
+
+      u32bit message_parts() const { return 2; }
+      u32bit message_part_size() const { return q.bytes(); }
+      u32bit max_input_bits() const { return q.bits(); }
+
+      bool with_recovery() const { return false; }
+
+      bool verify(const byte msg[], u32bit msg_len,
+                  const byte sig[], u32bit sig_len);
+   private:
+      const BigInt& q;
+      const BigInt& y;
+
+      Fixed_Base_Power_Mod powermod_g_p, powermod_y_p;
+      Modular_Reducer mod_p, mod_q;
+   };
+
 }
 
 #endif