Add ops for ElGamal encryption and decryption.

Note: blinding is not currently being used for RSA, RW, DH or ElGamal,
which used to have them. This should be added back before release.

1 files changed, 0 insertions, 56 deletions

diff --git a/src/pubkey/elgamal/elg_op.cpp b/src/pubkey/elgamal/elg_op.cpp
deleted file mode 100644
index 1e476ab7a..000000000
--- a/src/pubkey/elgamal/elg_op.cpp
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
-* ElGamal Operations
-* (C) 1999-2007 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#include <botan/elg_op.h>
-
-namespace Botan {
-
-/*
-* Default_ELG_Op Constructor
-*/
-Default_ELG_Op::Default_ELG_Op(const DL_Group& group, const BigInt& y,
-                               const BigInt& x) : p(group.get_p())
-   {
-   powermod_g_p = Fixed_Base_Power_Mod(group.get_g(), p);
-   powermod_y_p = Fixed_Base_Power_Mod(y, p);
-   mod_p = Modular_Reducer(p);
-
-   if(x != 0)
-      powermod_x_p = Fixed_Exponent_Power_Mod(x, p);
-   }
-
-/*
-* Default ElGamal Encrypt Operation
-*/
-SecureVector<byte> Default_ELG_Op::encrypt(const byte in[], u32bit length,
-                                           const BigInt& k) const
-   {
-   BigInt m(in, length);
-   if(m >= p)
-      throw Invalid_Argument("Default_ELG_Op::encrypt: Input is too large");
-
-   BigInt a = powermod_g_p(k);
-   BigInt b = mod_p.multiply(m, powermod_y_p(k));
-
-   SecureVector<byte> output(2*p.bytes());
-   a.binary_encode(output + (p.bytes() - a.bytes()));
-   b.binary_encode(output + output.size() / 2 + (p.bytes() - b.bytes()));
-   return output;
-   }
-
-/*
-* Default ElGamal Decrypt Operation
-*/
-BigInt Default_ELG_Op::decrypt(const BigInt& a, const BigInt& b) const
-   {
-   if(a >= p || b >= p)
-      throw Invalid_Argument("Default_ELG_Op: Invalid message");
-
-   return mod_p.multiply(b, inverse_mod(powermod_x_p(a), p));
-   }
-
-}