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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
|
/*************************************************
* PK Algorithm Core Source File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#include <botan/pk_core.h>
#include <botan/numthry.h>
#include <botan/engine.h>
#include <botan/config.h>
#include <botan/parsing.h>
#include <algorithm>
namespace Botan {
namespace {
const u32bit BLINDING_BITS = BOTAN_PRIVATE_KEY_OP_BLINDING_BITS;
}
/*************************************************
* IF_Core Constructor *
*************************************************/
IF_Core::IF_Core(RandomNumberGenerator& rng,
const BigInt& e, const BigInt& n, const BigInt& d,
const BigInt& p, const BigInt& q,
const BigInt& d1, const BigInt& d2, const BigInt& c)
{
op = Engine_Core::if_op(e, n, d, p, q, d1, d2, c);
if(d != 0)
{
BigInt k(rng, std::min(n.bits()-1, BLINDING_BITS));
if(k != 0)
blinder = Blinder(power_mod(k, e, n), inverse_mod(k, n), n);
}
}
/*************************************************
* IF_Core Copy Constructor *
*************************************************/
IF_Core::IF_Core(const IF_Core& core)
{
op = 0;
if(core.op)
op = core.op->clone();
blinder = core.blinder;
}
/*************************************************
* IF_Core Assignment Operator *
*************************************************/
IF_Core& IF_Core::operator=(const IF_Core& core)
{
delete op;
if(core.op)
op = core.op->clone();
blinder = core.blinder;
return (*this);
}
/*************************************************
* IF Public Operation *
*************************************************/
BigInt IF_Core::public_op(const BigInt& i) const
{
return op->public_op(i);
}
/*************************************************
* IF Private Operation *
*************************************************/
BigInt IF_Core::private_op(const BigInt& i) const
{
return blinder.unblind(op->private_op(blinder.blind(i)));
}
/*************************************************
* DSA_Core Constructor *
*************************************************/
DSA_Core::DSA_Core(const DL_Group& group, const BigInt& y, const BigInt& x)
{
op = Engine_Core::dsa_op(group, y, x);
}
/*************************************************
* DSA_Core Copy Constructor *
*************************************************/
DSA_Core::DSA_Core(const DSA_Core& core)
{
op = 0;
if(core.op)
op = core.op->clone();
}
/*************************************************
* DSA_Core Assignment Operator *
*************************************************/
DSA_Core& DSA_Core::operator=(const DSA_Core& core)
{
delete op;
if(core.op)
op = core.op->clone();
return (*this);
}
/*************************************************
* DSA Verification Operation *
*************************************************/
bool DSA_Core::verify(const byte msg[], u32bit msg_length,
const byte sig[], u32bit sig_length) const
{
return op->verify(msg, msg_length, sig, sig_length);
}
/*************************************************
* DSA Signature Operation *
*************************************************/
SecureVector<byte> DSA_Core::sign(const byte in[], u32bit length,
const BigInt& k) const
{
return op->sign(in, length, k);
}
/*************************************************
* NR_Core Constructor *
*************************************************/
NR_Core::NR_Core(const DL_Group& group, const BigInt& y, const BigInt& x)
{
op = Engine_Core::nr_op(group, y, x);
}
/*************************************************
* NR_Core Copy Constructor *
*************************************************/
NR_Core::NR_Core(const NR_Core& core)
{
op = 0;
if(core.op)
op = core.op->clone();
}
/*************************************************
* NR_Core Assignment Operator *
*************************************************/
NR_Core& NR_Core::operator=(const NR_Core& core)
{
delete op;
if(core.op)
op = core.op->clone();
return (*this);
}
/*************************************************
* NR Verification Operation *
*************************************************/
SecureVector<byte> NR_Core::verify(const byte in[], u32bit length) const
{
return op->verify(in, length);
}
/*************************************************
* NR Signature Operation *
*************************************************/
SecureVector<byte> NR_Core::sign(const byte in[], u32bit length,
const BigInt& k) const
{
return op->sign(in, length, k);
}
/*************************************************
* ELG_Core Constructor *
*************************************************/
ELG_Core::ELG_Core(RandomNumberGenerator& rng,
const DL_Group& group, const BigInt& y, const BigInt& x)
{
op = Engine_Core::elg_op(group, y, x);
p_bytes = 0;
if(x != 0)
{
const BigInt& p = group.get_p();
p_bytes = p.bytes();
BigInt k(rng, std::min(p.bits()-1, BLINDING_BITS));
if(k != 0)
blinder = Blinder(k, power_mod(k, x, p), p);
}
}
/*************************************************
* ELG_Core Copy Constructor *
*************************************************/
ELG_Core::ELG_Core(const ELG_Core& core)
{
op = 0;
if(core.op)
op = core.op->clone();
blinder = core.blinder;
p_bytes = core.p_bytes;
}
/*************************************************
* ELG_Core Assignment Operator *
*************************************************/
ELG_Core& ELG_Core::operator=(const ELG_Core& core)
{
delete op;
if(core.op)
op = core.op->clone();
blinder = core.blinder;
p_bytes = core.p_bytes;
return (*this);
}
/*************************************************
* ElGamal Encrypt Operation *
*************************************************/
SecureVector<byte> ELG_Core::encrypt(const byte in[], u32bit length,
const BigInt& k) const
{
return op->encrypt(in, length, k);
}
/*************************************************
* ElGamal Decrypt Operation *
*************************************************/
SecureVector<byte> ELG_Core::decrypt(const byte in[], u32bit length) const
{
if(length != 2*p_bytes)
throw Invalid_Argument("ELG_Core::decrypt: Invalid message");
BigInt a(in, p_bytes);
BigInt b(in + p_bytes, p_bytes);
return BigInt::encode(blinder.unblind(op->decrypt(blinder.blind(a), b)));
}
/*************************************************
* DH_Core Constructor *
*************************************************/
DH_Core::DH_Core(RandomNumberGenerator& rng,
const DL_Group& group, const BigInt& x)
{
op = Engine_Core::dh_op(group, x);
const BigInt& p = group.get_p();
BigInt k(rng, std::min(p.bits()-1, BLINDING_BITS));
if(k != 0)
blinder = Blinder(k, power_mod(inverse_mod(k, p), x, p), p);
}
/*************************************************
* DH_Core Copy Constructor *
*************************************************/
DH_Core::DH_Core(const DH_Core& core)
{
op = 0;
if(core.op)
op = core.op->clone();
blinder = core.blinder;
}
/*************************************************
* DH_Core Assignment Operator *
*************************************************/
DH_Core& DH_Core::operator=(const DH_Core& core)
{
delete op;
if(core.op)
op = core.op->clone();
blinder = core.blinder;
return (*this);
}
/*************************************************
* DH Operation *
*************************************************/
BigInt DH_Core::agree(const BigInt& i) const
{
return blinder.unblind(op->agree(blinder.blind(i)));
}
}
|
