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-rw-r--r--src/pubkey/nr/info.txt2
-rw-r--r--src/pubkey/nr/nr_core.h3
-rw-r--r--src/pubkey/nr/nr_op.cpp79
-rw-r--r--src/pubkey/nr/nr_op.h51
4 files changed, 133 insertions, 2 deletions
diff --git a/src/pubkey/nr/info.txt b/src/pubkey/nr/info.txt
index f7325d984..b574af0e7 100644
--- a/src/pubkey/nr/info.txt
+++ b/src/pubkey/nr/info.txt
@@ -9,6 +9,8 @@ nr.cpp
nr.h
nr_core.cpp
nr_core.h
+nr_op.cpp
+nr_op.h
</add>
<requires>
diff --git a/src/pubkey/nr/nr_core.h b/src/pubkey/nr/nr_core.h
index 416e31619..69a605c8d 100644
--- a/src/pubkey/nr/nr_core.h
+++ b/src/pubkey/nr/nr_core.h
@@ -6,8 +6,7 @@
#ifndef BOTAN_NR_CORE_H__
#define BOTAN_NR_CORE_H__
-#include <botan/bigint.h>
-#include <botan/pk_ops.h>
+#include <botan/nr_op.h>
#include <botan/dl_group.h>
namespace Botan {
diff --git a/src/pubkey/nr/nr_op.cpp b/src/pubkey/nr/nr_op.cpp
new file mode 100644
index 000000000..dfb44d617
--- /dev/null
+++ b/src/pubkey/nr/nr_op.cpp
@@ -0,0 +1,79 @@
+/*************************************************
+* NR Operations Source File *
+* (C) 1999-2007 Jack Lloyd *
+*************************************************/
+
+#include <botan/nr_op.h>
+#include <botan/eng_def.h>
+
+namespace Botan {
+
+/*************************************************
+* Default_NR_Op Constructor *
+*************************************************/
+Default_NR_Op::Default_NR_Op(const DL_Group& grp, const BigInt& y1,
+ const BigInt& x1) : x(x1), y(y1), group(grp)
+ {
+ powermod_g_p = Fixed_Base_Power_Mod(group.get_g(), group.get_p());
+ powermod_y_p = Fixed_Base_Power_Mod(y, group.get_p());
+ mod_p = Modular_Reducer(group.get_p());
+ mod_q = Modular_Reducer(group.get_q());
+ }
+
+/*************************************************
+* Default NR Verify Operation *
+*************************************************/
+SecureVector<byte> Default_NR_Op::verify(const byte in[], u32bit length) const
+ {
+ const BigInt& q = group.get_q();
+
+ if(length != 2*q.bytes())
+ return false;
+
+ BigInt c(in, q.bytes());
+ BigInt d(in + q.bytes(), q.bytes());
+
+ if(c.is_zero() || c >= q || d >= q)
+ throw Invalid_Argument("Default_NR_Op::verify: Invalid signature");
+
+ BigInt i = mod_p.multiply(powermod_g_p(d), powermod_y_p(c));
+ return BigInt::encode(mod_q.reduce(c - i));
+ }
+
+/*************************************************
+* Default NR Sign Operation *
+*************************************************/
+SecureVector<byte> Default_NR_Op::sign(const byte in[], u32bit length,
+ const BigInt& k) const
+ {
+ if(x == 0)
+ throw Internal_Error("Default_NR_Op::sign: No private key");
+
+ const BigInt& q = group.get_q();
+
+ BigInt f(in, length);
+
+ if(f >= q)
+ throw Invalid_Argument("Default_NR_Op::sign: Input is out of range");
+
+ BigInt c = mod_q.reduce(powermod_g_p(k) + f);
+ if(c.is_zero())
+ throw Internal_Error("Default_NR_Op::sign: c was zero");
+ BigInt d = mod_q.reduce(k - x * c);
+
+ SecureVector<byte> output(2*q.bytes());
+ c.binary_encode(output + (output.size() / 2 - c.bytes()));
+ d.binary_encode(output + (output.size() - d.bytes()));
+ return output;
+ }
+
+/*************************************************
+* Acquire a NR op *
+*************************************************/
+NR_Operation* Default_Engine::nr_op(const DL_Group& group, const BigInt& y,
+ const BigInt& x) const
+ {
+ return new Default_NR_Op(group, y, x);
+ }
+
+}
diff --git a/src/pubkey/nr/nr_op.h b/src/pubkey/nr/nr_op.h
new file mode 100644
index 000000000..11c2cd26a
--- /dev/null
+++ b/src/pubkey/nr/nr_op.h
@@ -0,0 +1,51 @@
+/*************************************************
+* NR Operations Header File *
+* (C) 1999-2008 Jack Lloyd *
+*************************************************/
+
+#ifndef BOTAN_NR_OPS_H__
+#define BOTAN_NR_OPS_H__
+
+#include <botan/pow_mod.h>
+#include <botan/numthry.h>
+#include <botan/reducer.h>
+#include <botan/dl_group.h>
+
+namespace Botan {
+
+/*************************************************
+* NR Operation *
+*************************************************/
+class BOTAN_DLL NR_Operation
+ {
+ public:
+ virtual SecureVector<byte> verify(const byte[], u32bit) const = 0;
+ virtual SecureVector<byte> sign(const byte[], u32bit,
+ const BigInt&) const = 0;
+ virtual NR_Operation* clone() const = 0;
+ virtual ~NR_Operation() {}
+ };
+
+/*************************************************
+* Botan's Default NR Operation *
+*************************************************/
+class BOTAN_DLL Default_NR_Op : public NR_Operation
+ {
+ public:
+ SecureVector<byte> verify(const byte[], u32bit) const;
+ SecureVector<byte> sign(const byte[], u32bit, const BigInt&) const;
+
+ NR_Operation* clone() const { return new Default_NR_Op(*this); }
+
+ Default_NR_Op(const DL_Group&, const BigInt&, const BigInt&);
+ private:
+ const BigInt x, y;
+ const DL_Group group;
+ Fixed_Base_Power_Mod powermod_g_p, powermod_y_p;
+ Modular_Reducer mod_p, mod_q;
+ };
+
+
+}
+
+#endif