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
|
using System;
using Org.BouncyCastle.Utilities.Encoders;
namespace Org.BouncyCastle.Math.EC.Custom.Sec
{
internal class SecP160R1Curve
: AbstractFpCurve
{
public static readonly BigInteger q = new BigInteger(1,
Hex.Decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF"));
private const int SecP160R1_DEFAULT_COORDS = COORD_JACOBIAN;
protected readonly SecP160R1Point m_infinity;
public SecP160R1Curve()
: base(q)
{
this.m_infinity = new SecP160R1Point(this, null, null);
this.m_a = FromBigInteger(new BigInteger(1,
Hex.Decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC")));
this.m_b = FromBigInteger(new BigInteger(1,
Hex.Decode("1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45")));
this.m_order = new BigInteger(1, Hex.Decode("0100000000000000000001F4C8F927AED3CA752257"));
this.m_cofactor = BigInteger.One;
this.m_coord = SecP160R1_DEFAULT_COORDS;
}
protected override ECCurve CloneCurve()
{
return new SecP160R1Curve();
}
public override bool SupportsCoordinateSystem(int coord)
{
switch (coord)
{
case COORD_JACOBIAN:
return true;
default:
return false;
}
}
public virtual BigInteger Q
{
get { return q; }
}
public override ECPoint Infinity
{
get { return m_infinity; }
}
public override int FieldSize
{
get { return q.BitLength; }
}
public override ECFieldElement FromBigInteger(BigInteger x)
{
return new SecP160R1FieldElement(x);
}
protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, bool withCompression)
{
return new SecP160R1Point(this, x, y, withCompression);
}
protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, bool withCompression)
{
return new SecP160R1Point(this, x, y, zs, withCompression);
}
}
}
|
