1 files changed, 116 insertions, 0 deletions
diff --git a/lib/pubkey/dl_algo/dl_algo.h b/lib/pubkey/dl_algo/dl_algo.h
new file mode 100644
index 000000000..abd2acba4
--- /dev/null
+++ b/lib/pubkey/dl_algo/dl_algo.h
@@ -0,0 +1,116 @@
+/*
+* DL Scheme
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_DL_ALGO_H__
+#define BOTAN_DL_ALGO_H__
+
+#include <botan/dl_group.h>
+#include <botan/x509_key.h>
+#include <botan/pkcs8.h>
+
+namespace Botan {
+
+/**
+* This class represents discrete logarithm (DL) public keys.
+*/
+class BOTAN_DLL DL_Scheme_PublicKey : public virtual Public_Key
+   {
+   public:
+      bool check_key(RandomNumberGenerator& rng, bool) const;
+
+      AlgorithmIdentifier algorithm_identifier() const;
+
+      std::vector<byte> x509_subject_public_key() const;
+
+      /**
+      * Get the DL domain parameters of this key.
+      * @return DL domain parameters of this key
+      */
+      const DL_Group& get_domain() const { return group; }
+
+      /**
+      * Get the public value y with y = g^x mod p where x is the secret key.
+      */
+      const BigInt& get_y() const { return y; }
+
+      /**
+      * Get the prime p of the underlying DL group.
+      * @return prime p
+      */
+      const BigInt& group_p() const { return group.get_p(); }
+
+      /**
+      * Get the prime q of the underlying DL group.
+      * @return prime q
+      */
+      const BigInt& group_q() const { return group.get_q(); }
+
+      /**
+      * Get the generator g of the underlying DL group.
+      * @return generator g
+      */
+      const BigInt& group_g() const { return group.get_g(); }
+
+      /**
+      * Get the underlying groups encoding format.
+      * @return encoding format
+      */
+      virtual DL_Group::Format group_format() const = 0;
+
+      size_t estimated_strength() const override;
+
+      DL_Scheme_PublicKey(const AlgorithmIdentifier& alg_id,
+                          const secure_vector<byte>& key_bits,
+                          DL_Group::Format group_format);
+
+   protected:
+      DL_Scheme_PublicKey() {}
+
+      /**
+      * The DL public key
+      */
+      BigInt y;
+
+      /**
+      * The DL group
+      */
+      DL_Group group;
+   };
+
+/**
+* This class represents discrete logarithm (DL) private keys.
+*/
+class BOTAN_DLL DL_Scheme_PrivateKey : public virtual DL_Scheme_PublicKey,
+                                       public virtual Private_Key
+   {
+   public:
+      bool check_key(RandomNumberGenerator& rng, bool) const;
+
+      /**
+      * Get the secret key x.
+      * @return secret key
+      */
+      const BigInt& get_x() const { return x; }
+
+      secure_vector<byte> pkcs8_private_key() const;
+
+      DL_Scheme_PrivateKey(const AlgorithmIdentifier& alg_id,
+                           const secure_vector<byte>& key_bits,
+                           DL_Group::Format group_format);
+
+   protected:
+      DL_Scheme_PrivateKey() {}
+
+      /**
+      * The DL private key
+      */
+      BigInt x;
+   };
+
+}
+
+#endif