aboutsummaryrefslogtreecommitdiffstats
path: root/src/pubkey
diff options
context:
space:
mode:
Diffstat (limited to 'src/pubkey')
-rw-r--r--src/pubkey/ecdsa/ecdsa.cpp75
-rw-r--r--src/pubkey/ecdsa/ecdsa.h9
-rw-r--r--src/pubkey/ecdsa/ecdsa_core.cpp58
-rw-r--r--src/pubkey/ecdsa/ecdsa_core.h46
-rw-r--r--src/pubkey/ecdsa/ecdsa_op.cpp74
-rw-r--r--src/pubkey/ecdsa/ecdsa_op.h64
6 files changed, 45 insertions, 281 deletions
diff --git a/src/pubkey/ecdsa/ecdsa.cpp b/src/pubkey/ecdsa/ecdsa.cpp
index 7afbf96af..f5ded5aa6 100644
--- a/src/pubkey/ecdsa/ecdsa.cpp
+++ b/src/pubkey/ecdsa/ecdsa.cpp
@@ -9,17 +9,21 @@
#include <botan/ecdsa.h>
-#include <assert.h>
-
namespace Botan {
+ECDSA_PublicKey::ECDSA_PublicKey(const EC_Domain_Params& dom_par,
+ const PointGFp& pub_point)
+ {
+ domain_encoding = EC_DOMPAR_ENC_EXPLICIT;
+ domain_params = dom_par;
+ public_key = pub_point;
+ }
+
ECDSA_PrivateKey::ECDSA_PrivateKey(RandomNumberGenerator& rng,
const EC_Domain_Params& dom_pars)
{
domain_params = dom_pars;
generate_private_key(rng);
-
- ecdsa_core = ECDSA_Core(domain(), private_value(), public_point());
}
ECDSA_PrivateKey::ECDSA_PrivateKey(const EC_Domain_Params& dom_pars,
@@ -38,36 +42,34 @@ ECDSA_PrivateKey::ECDSA_PrivateKey(const EC_Domain_Params& dom_pars,
{
throw Invalid_State("ECDSA key generation failed");
}
-
- ecdsa_core = ECDSA_Core(domain(), private_value(), public_point());
}
bool ECDSA_PublicKey::verify(const byte msg[], u32bit msg_len,
const byte sig[], u32bit sig_len) const
{
- return ecdsa_core.verify(msg, msg_len, sig, sig_len);
- }
+ const BigInt& n = domain().get_order();
-ECDSA_PublicKey::ECDSA_PublicKey(const EC_Domain_Params& dom_par,
- const PointGFp& pub_point)
- {
- domain_encoding = EC_DOMPAR_ENC_EXPLICIT;
- domain_params = dom_par;
- public_key = pub_point;
+ if(n == 0)
+ throw Invalid_State("ECDSA_PublicKey::verify: Not initialized");
- ecdsa_core = ECDSA_Core(domain(), 0, public_point());
- }
+ if(sig_len != n.bytes()*2)
+ return false;
-void ECDSA_PublicKey::X509_load_hook()
- {
- EC_PublicKey::X509_load_hook();
- ecdsa_core = ECDSA_Core(domain(), 0, public_point());
- }
+ BigInt e(msg, msg_len);
-void ECDSA_PrivateKey::PKCS8_load_hook(bool generated)
- {
- EC_PrivateKey::PKCS8_load_hook(generated);
- ecdsa_core = ECDSA_Core(domain(), private_value(), public_point());
+ BigInt r(sig, sig_len / 2);
+ BigInt s(sig + sig_len / 2, sig_len / 2);
+
+ if(r < 0 || r >= n || s < 0 || s >= n)
+ return false;
+
+ BigInt w = inverse_mod(s, n);
+
+ PointGFp R = w * (e * domain().get_base_point() + r*public_point());
+ if(R.is_zero())
+ return false;
+
+ return (R.get_affine_x() % n == r);
}
SecureVector<byte> ECDSA_PrivateKey::sign(const byte msg[],
@@ -76,17 +78,30 @@ SecureVector<byte> ECDSA_PrivateKey::sign(const byte msg[],
{
const BigInt& n = domain().get_order();
- if(n == 0)
- throw Invalid_State("ECDSA_PrivateKey: Not initialized");
-
- assert(n.bits() >= 1);
+ if(n == 0 || private_value() == 0)
+ throw Invalid_State("ECDSA_PrivateKey::sign: Not initialized");
BigInt k;
do
k.randomize(rng, n.bits()-1);
while(k >= n);
- return ecdsa_core.sign(msg, msg_len, k);
+ BigInt e(msg, msg_len);
+
+ PointGFp k_times_P = domain().get_base_point() * k;
+ BigInt r = k_times_P.get_affine_x() % n;
+
+ if(r == 0)
+ throw Internal_Error("Default_ECDSA_Op::sign: r was zero");
+
+ BigInt k_inv = inverse_mod(k, n);
+
+ BigInt s = (((r * private_value()) + e) * k_inv) % n;
+
+ SecureVector<byte> output(2*n.bytes());
+ r.binary_encode(output + (output.size() / 2 - r.bytes()));
+ s.binary_encode(output + (output.size() - s.bytes()));
+ return output;
}
}
diff --git a/src/pubkey/ecdsa/ecdsa.h b/src/pubkey/ecdsa/ecdsa.h
index bc767d8ad..447bc3758 100644
--- a/src/pubkey/ecdsa/ecdsa.h
+++ b/src/pubkey/ecdsa/ecdsa.h
@@ -11,7 +11,6 @@
#define BOTAN_ECDSA_KEY_H__
#include <botan/ecc_key.h>
-#include <botan/ecdsa_core.h>
namespace Botan {
@@ -64,11 +63,6 @@ class BOTAN_DLL ECDSA_PublicKey : public virtual EC_PublicKey,
*/
ECDSA_PublicKey(const EC_Domain_Params& dom_par,
const PointGFp& public_point); // sets core
-
- protected:
- void X509_load_hook();
-
- ECDSA_Core ecdsa_core;
};
/**
@@ -108,9 +102,6 @@ class BOTAN_DLL ECDSA_PrivateKey : public ECDSA_PublicKey,
SecureVector<byte> sign(const byte message[], u32bit mess_len,
RandomNumberGenerator& rng) const;
-
- private:
- void PKCS8_load_hook(bool = false);
};
}
diff --git a/src/pubkey/ecdsa/ecdsa_core.cpp b/src/pubkey/ecdsa/ecdsa_core.cpp
deleted file mode 100644
index d661963f2..000000000
--- a/src/pubkey/ecdsa/ecdsa_core.cpp
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
-* ECDSA Core
-* (C) 1999-2010 Jack Lloyd
-* (C) 2007 FlexSecure GmbH
-*
-* Distributed under the terms of the Botan license
-*/
-
-#include <botan/ecdsa_core.h>
-#include <botan/internal/pk_engine.h>
-
-namespace Botan {
-
-/*
-* ECDSA Operation
-*/
-bool ECDSA_Core::verify(const byte signature[], u32bit sig_len,
- const byte message[], u32bit mess_len) const
- {
- if(op == 0)
- throw Invalid_State("ECDSA_Core: uninitialized");
-
- return op->verify(signature, sig_len, message, mess_len);
- }
-
-SecureVector<byte> ECDSA_Core::sign(const byte message[],
- u32bit mess_len,
- const BigInt& k) const
- {
- if(op == 0)
- throw Invalid_State("ECDSA_Core: uninitialized");
-
- return op->sign(message, mess_len, k);
- }
-
-ECDSA_Core& ECDSA_Core::operator=(const ECDSA_Core& core)
- {
- delete op;
- if(core.op)
- op = core.op->clone();
- return (*this);
- }
-
-ECDSA_Core::ECDSA_Core(const ECDSA_Core& core)
- {
- op = 0;
- if(core.op)
- op = core.op->clone();
- }
-
-ECDSA_Core::ECDSA_Core(const EC_Domain_Params& dom_pars,
- const BigInt& priv_key,
- const PointGFp& pub_key)
- {
- op = Engine_Core::ecdsa_op(dom_pars, priv_key, pub_key);
- }
-
-}
diff --git a/src/pubkey/ecdsa/ecdsa_core.h b/src/pubkey/ecdsa/ecdsa_core.h
deleted file mode 100644
index c6583a86f..000000000
--- a/src/pubkey/ecdsa/ecdsa_core.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
-* ECDSA Core
-* (C) 1999-2007 Jack Lloyd
-* (C) 2007 FlexSecure GmbH
-*
-* Distributed under the terms of the Botan license
-*/
-
-#ifndef BOTAN_ECDSA_CORE_H__
-#define BOTAN_ECDSA_CORE_H__
-
-#include <botan/ecdsa_op.h>
-#include <botan/ec_dompar.h>
-
-namespace Botan {
-
-/*
-* ECDSA Core
-*/
-class BOTAN_DLL ECDSA_Core
- {
- public:
- bool verify(const byte signature[], u32bit sig_len,
- const byte message[], u32bit mess_len) const;
-
- SecureVector<byte> sign(const byte message[], u32bit mess_len,
- const BigInt& k) const;
-
- ECDSA_Core& operator=(const ECDSA_Core&);
-
- ECDSA_Core() { op = 0; }
-
- ECDSA_Core(const ECDSA_Core&);
-
- ECDSA_Core(const EC_Domain_Params& dom_pars,
- const BigInt& priv_key,
- const PointGFp& pub_key);
-
- ~ECDSA_Core() { delete op; }
- private:
- ECDSA_Operation* op;
- };
-
-}
-
-#endif
diff --git a/src/pubkey/ecdsa/ecdsa_op.cpp b/src/pubkey/ecdsa/ecdsa_op.cpp
deleted file mode 100644
index dd92ac5c0..000000000
--- a/src/pubkey/ecdsa/ecdsa_op.cpp
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
-* ECDSA Operation
-* (C) 2007 FlexSecure GmbH
-* 2008-2010 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#include <botan/ecdsa_op.h>
-#include <botan/numthry.h>
-
-namespace Botan {
-
-Default_ECDSA_Op::Default_ECDSA_Op(const EC_Domain_Params& domain,
- const BigInt& priv,
- const PointGFp& pub) :
- dom_pars(domain), mod_n(dom_pars.get_order()),
- pub_key(pub), priv_key(priv)
- {
- }
-
-bool Default_ECDSA_Op::verify(const byte msg[], u32bit msg_len,
- const byte sig[], u32bit sig_len) const
- {
- const BigInt& n = dom_pars.get_order();
-
- if(sig_len != n.bytes()*2)
- return false;
-
- BigInt e(msg, msg_len);
-
- BigInt r(sig, sig_len / 2);
- BigInt s(sig + sig_len / 2, sig_len / 2);
-
- if(r < 0 || r >= n || s < 0 || s >= n)
- return false;
-
- BigInt w = inverse_mod(s, n);
-
- PointGFp R = w * (e * dom_pars.get_base_point() + r*pub_key);
- if(R.is_zero())
- return false;
-
- return (mod_n.reduce(R.get_affine_x()) == r);
- }
-
-SecureVector<byte> Default_ECDSA_Op::sign(const byte msg[], u32bit msg_len,
- const BigInt& k) const
- {
- if(priv_key == 0)
- throw Internal_Error("Default_ECDSA_Op::sign(): no private key");
-
- const BigInt& n = dom_pars.get_order();
-
- BigInt e(msg, msg_len);
-
- PointGFp k_times_P = dom_pars.get_base_point() * k;
- BigInt r = mod_n.reduce(k_times_P.get_affine_x());
-
- if(r == 0)
- throw Internal_Error("Default_ECDSA_Op::sign: r was zero");
-
- BigInt k_inv = inverse_mod(k, n);
-
- BigInt s = mod_n.reduce(mod_n.multiply(r, priv_key) + e);
- s = mod_n.multiply(s, k_inv);
-
- SecureVector<byte> output(2*n.bytes());
- r.binary_encode(output + (output.size() / 2 - r.bytes()));
- s.binary_encode(output + (output.size() - s.bytes()));
- return output;
- }
-
-}
diff --git a/src/pubkey/ecdsa/ecdsa_op.h b/src/pubkey/ecdsa/ecdsa_op.h
deleted file mode 100644
index 3a492ccf4..000000000
--- a/src/pubkey/ecdsa/ecdsa_op.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
-* ECDSA Operations
-* (C) 1999-2008 Jack Lloyd
-* (C) 2007 FlexSecure GmbH
-*
-* Distributed under the terms of the Botan license
-*/
-
-#ifndef BOTAN_ECDSA_OPERATIONS_H__
-#define BOTAN_ECDSA_OPERATIONS_H__
-
-#include <botan/ec_dompar.h>
-#include <botan/reducer.h>
-
-namespace Botan {
-
-/*
-* ECDSA Operation
-*/
-class BOTAN_DLL ECDSA_Operation
- {
- public:
- virtual bool verify(const byte msg[], u32bit msg_len,
- const byte sig[], u32bit sig_len) const = 0;
-
- virtual SecureVector<byte> sign(const byte msg[], u32bit msg_len,
- const BigInt& k) const = 0;
-
- virtual ECDSA_Operation* clone() const = 0;
-
- virtual ~ECDSA_Operation() {}
- };
-
-/*
-* Default ECDSA operation
-*/
-class BOTAN_DLL Default_ECDSA_Op : public ECDSA_Operation
- {
- public:
- bool verify(const byte sig[], u32bit sig_len,
- const byte msg[], u32bit msg_len) const;
-
- SecureVector<byte> sign(const byte msg[], u32bit msg_len,
- const BigInt& k) const;
-
- ECDSA_Operation* clone() const
- {
- return new Default_ECDSA_Op(*this);
- }
-
- Default_ECDSA_Op(const EC_Domain_Params& dom_pars,
- const BigInt& priv_key,
- const PointGFp& pub_key);
- private:
- EC_Domain_Params dom_pars;
- Modular_Reducer mod_n;
-
- PointGFp pub_key;
- BigInt priv_key;
- };
-
-}
-
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 23:05:43 +0000