1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* DSA Operations
* (C) 1999-2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_DSA_OPS_H__
#define BOTAN_DSA_OPS_H__
#include <botan/numthry.h>
#include <botan/pow_mod.h>
#include <botan/reducer.h>
#include <botan/dl_group.h>
namespace Botan {
/*
* DSA Operation
*/
class BOTAN_DLL DSA_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 DSA_Operation* clone() const = 0;
virtual ~DSA_Operation() {}
};
/*
* Botan's Default DSA Operation
*/
class BOTAN_DLL Default_DSA_Op : public DSA_Operation
{
public:
bool verify(const byte msg[], u32bit msg_len,
const byte sig[], u32bit sig_len) const;
SecureVector<byte> sign(const byte msg[], u32bit msg_len,
const BigInt& k) const;
DSA_Operation* clone() const { return new Default_DSA_Op(*this); }
Default_DSA_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
|
