blob: 1fd5ceae0405805d70914d34f2764750bee5d982 (
plain)
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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*************************************************
* ECDSA Domain Parameters Header File *
* (C) 2007 Falko Strenzke, FlexSecure GmbH *
*************************************************/
#ifndef EC_DOMPAR_H__
#define EC_DOMPAR_H__
#include <botan/point_gfp.h>
#include <botan/gfp_element.h>
#include <botan/curve_gfp.h>
#include <botan/bigint.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/alg_id.h>
#include <botan/enums.h>
namespace Botan {
/**
* This class represents elliptic curce domain parameters
*/
class BOTAN_DLL EC_Domain_Params
{
public:
/**
* Construct Domain paramers from specified parameters
* @param curve elliptic curve
* @param base_point a base point
* @param order the order of the base point
* @param cofactor the cofactor
*/
EC_Domain_Params(CurveGFp const& curve, PointGFp const& base_point,
const BigInt& order, const BigInt& cofactor);
/**
* Return domain parameter curve
* @result domain parameter curve
*/
const CurveGFp& get_curve() const
{
return m_curve;
}
/**
* Return domain parameter curve
* @result domain parameter curve
*/
const PointGFp& get_base_point() const
{
return m_base_point;
}
/**
* Return the order of the base point
* @result order of the base point
*/
const BigInt& get_order() const
{
return m_order;
}
/**
* Return the cofactor
* @result the cofactor
*/
const BigInt& get_cofactor() const
{
return m_cofactor;
}
/**
* Return the OID of these domain parameters
* @result the OID
*/
std::string get_oid() const { return m_oid; }
private:
friend EC_Domain_Params get_EC_Dom_Pars_by_oid(std::string oid);
CurveGFp m_curve;
PointGFp m_base_point;
BigInt m_order;
BigInt m_cofactor;
std::string m_oid;
};
bool operator==(EC_Domain_Params const& lhs, EC_Domain_Params const& rhs);
inline bool operator!=(const EC_Domain_Params& lhs,
const EC_Domain_Params& rhs)
{
return !(lhs == rhs);
}
enum EC_dompar_enc { ENC_EXPLICIT = 0, ENC_IMPLICITCA = 1, ENC_OID = 2 };
SecureVector<byte> encode_der_ec_dompar(EC_Domain_Params const& dom_pars,
EC_dompar_enc enc_type);
EC_Domain_Params decode_ber_ec_dompar(SecureVector<byte> const& encoded);
/**
* Factory function, the only way to obtain EC domain parameters with an OID.
* The demanded OID has to be registered in the InSiTo configuration. Consult the file
* policy.cpp for the default configuration.
* @param the oid of the demanded EC domain parameters
* @result the EC domain parameters associated with the OID
*/
EC_Domain_Params get_EC_Dom_Pars_by_oid(std::string oid);
}
#endif
|
