summaryrefslogtreecommitdiffstats
path: root/security/nss/gtests/freebl_gtest/mpi_unittest.cc
blob: 56b7454dc96e2350e261078762be09638de1b280 (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
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
289
290
291
292
293
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.

#include "gtest/gtest.h"

#include <stdint.h>
#include <string.h>
#include <memory>

#ifdef __MACH__
#include <mach/clock.h>
#include <mach/mach.h>
#endif

#include "mpi.h"
namespace nss_test {

void gettime(struct timespec* tp) {
#ifdef __MACH__
  clock_serv_t cclock;
  mach_timespec_t mts;

  host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
  clock_get_time(cclock, &mts);
  mach_port_deallocate(mach_task_self(), cclock);

  tp->tv_sec = mts.tv_sec;
  tp->tv_nsec = mts.tv_nsec;
#else
  ASSERT_NE(0, timespec_get(tp, TIME_UTC));
#endif
}

class MPITest : public ::testing::Test {
 protected:
  void TestCmp(const std::string a_string, const std::string b_string,
               int result) {
    mp_int a, b;
    MP_DIGITS(&a) = 0;
    MP_DIGITS(&b) = 0;
    ASSERT_EQ(MP_OKAY, mp_init(&a));
    ASSERT_EQ(MP_OKAY, mp_init(&b));

    mp_read_radix(&a, a_string.c_str(), 16);
    mp_read_radix(&b, b_string.c_str(), 16);
    EXPECT_EQ(result, mp_cmp(&a, &b));

    mp_clear(&a);
    mp_clear(&b);
  }

  void TestDiv(const std::string a_string, const std::string b_string,
               const std::string result) {
    mp_int a, b, c;
    MP_DIGITS(&a) = 0;
    MP_DIGITS(&b) = 0;
    MP_DIGITS(&c) = 0;
    ASSERT_EQ(MP_OKAY, mp_init(&a));
    ASSERT_EQ(MP_OKAY, mp_init(&b));
    ASSERT_EQ(MP_OKAY, mp_init(&c));

    mp_read_radix(&a, a_string.c_str(), 16);
    mp_read_radix(&b, b_string.c_str(), 16);
    mp_read_radix(&c, result.c_str(), 16);
    EXPECT_EQ(MP_OKAY, mp_div(&a, &b, &a, &b));
    EXPECT_EQ(0, mp_cmp(&a, &c));

    mp_clear(&a);
    mp_clear(&b);
    mp_clear(&c);
  }

  void dump(const std::string& prefix, const uint8_t* buf, size_t len) {
    auto flags = std::cerr.flags();
    std::cerr << prefix << ": [" << std::dec << len << "] ";
    for (size_t i = 0; i < len; ++i) {
      std::cerr << std::hex << std::setw(2) << std::setfill('0')
                << static_cast<int>(buf[i]);
    }
    std::cerr << std::endl << std::resetiosflags(flags);
  }

  void TestToFixedOctets(const std::vector<uint8_t>& ref, size_t len) {
    mp_int a;
    ASSERT_EQ(MP_OKAY, mp_init(&a));
    ASSERT_EQ(MP_OKAY, mp_read_unsigned_octets(&a, ref.data(), ref.size()));
    std::unique_ptr<uint8_t[]> buf(new uint8_t[len]);
    ASSERT_NE(buf, nullptr);
    ASSERT_EQ(MP_OKAY, mp_to_fixlen_octets(&a, buf.get(), len));
    size_t compare;
    if (len > ref.size()) {
      for (size_t i = 0; i < len - ref.size(); ++i) {
        ASSERT_EQ(0U, buf[i]) << "index " << i << " should be zero";
      }
      compare = ref.size();
    } else {
      compare = len;
    }
    dump("value", ref.data(), ref.size());
    dump("output", buf.get(), len);
    ASSERT_EQ(0, memcmp(buf.get() + len - compare,
                        ref.data() + ref.size() - compare, compare))
        << "comparing " << compare << " octets";
    mp_clear(&a);
  }
};

TEST_F(MPITest, MpiCmp01Test) { TestCmp("0", "1", -1); }
TEST_F(MPITest, MpiCmp10Test) { TestCmp("1", "0", 1); }
TEST_F(MPITest, MpiCmp00Test) { TestCmp("0", "0", 0); }
TEST_F(MPITest, MpiCmp11Test) { TestCmp("1", "1", 0); }
TEST_F(MPITest, MpiDiv32ErrorTest) {
  TestDiv("FFFF00FFFFFFFF000000000000", "FFFF00FFFFFFFFFF", "FFFFFFFFFF");
}

#ifdef NSS_X64
// This tests assumes 64-bit mp_digits.
TEST_F(MPITest, MpiCmpUnalignedTest) {
  mp_int a, b, c;
  MP_DIGITS(&a) = 0;
  MP_DIGITS(&b) = 0;
  MP_DIGITS(&c) = 0;
  ASSERT_EQ(MP_OKAY, mp_init(&a));
  ASSERT_EQ(MP_OKAY, mp_init(&b));
  ASSERT_EQ(MP_OKAY, mp_init(&c));

  mp_read_radix(&a, "ffffffffffffffff3b4e802b4e1478", 16);
  mp_read_radix(&b, "ffffffffffffffff3b4e802b4e1478", 16);
  EXPECT_EQ(0, mp_cmp(&a, &b));

  // Now change a and b such that they contain the same numbers but are not
  // aligned.
  // a = ffffffffffffff|ff3b4e802b4e1478
  // b = ffffffffffffffff|3b4e802b4e1478
  MP_DIGITS(&b)[0] &= 0x00ffffffffffffff;
  MP_DIGITS(&b)[1] = 0xffffffffffffffff;
  EXPECT_EQ(-1, mp_cmp(&a, &b));

  ASSERT_EQ(MP_OKAY, mp_sub(&a, &b, &c));
  char c_tmp[40];
  ASSERT_EQ(MP_OKAY, mp_toradix(&c, c_tmp, 16));
  ASSERT_TRUE(strncmp(c_tmp, "feffffffffffffff100000000000000", 31));

  mp_clear(&a);
  mp_clear(&b);
  mp_clear(&c);
}
#endif

// The two follow tests ensure very similar mp_set_* functions are ok.
TEST_F(MPITest, MpiSetUlong) {
  mp_int a, b, c;
  MP_DIGITS(&a) = 0;
  MP_DIGITS(&b) = 0;
  MP_DIGITS(&c) = 0;
  ASSERT_EQ(MP_OKAY, mp_init(&a));
  ASSERT_EQ(MP_OKAY, mp_init(&b));
  ASSERT_EQ(MP_OKAY, mp_init(&c));
  EXPECT_EQ(MP_OKAY, mp_set_ulong(&a, 1));
  EXPECT_EQ(MP_OKAY, mp_set_ulong(&b, 0));
  EXPECT_EQ(MP_OKAY, mp_set_ulong(&c, -1));

  mp_clear(&a);
  mp_clear(&b);
  mp_clear(&c);
}

TEST_F(MPITest, MpiSetInt) {
  mp_int a, b, c;
  MP_DIGITS(&a) = 0;
  MP_DIGITS(&b) = 0;
  MP_DIGITS(&c) = 0;
  ASSERT_EQ(MP_OKAY, mp_init(&a));
  ASSERT_EQ(MP_OKAY, mp_init(&b));
  ASSERT_EQ(MP_OKAY, mp_init(&c));
  EXPECT_EQ(MP_OKAY, mp_set_int(&a, 1));
  EXPECT_EQ(MP_OKAY, mp_set_int(&b, 0));
  EXPECT_EQ(MP_OKAY, mp_set_int(&c, -1));

  mp_clear(&a);
  mp_clear(&b);
  mp_clear(&c);
}

TEST_F(MPITest, MpiFixlenOctetsZero) {
  std::vector<uint8_t> zero = {0};
  TestToFixedOctets(zero, 1);
  TestToFixedOctets(zero, 2);
  TestToFixedOctets(zero, sizeof(mp_digit));
  TestToFixedOctets(zero, sizeof(mp_digit) + 1);
}

TEST_F(MPITest, MpiFixlenOctetsVarlen) {
  std::vector<uint8_t> packed;
  for (size_t i = 0; i < sizeof(mp_digit) * 2; ++i) {
    packed.push_back(0xa4);  // Any non-zero value will do.
    TestToFixedOctets(packed, packed.size());
    TestToFixedOctets(packed, packed.size() + 1);
    TestToFixedOctets(packed, packed.size() + sizeof(mp_digit));
  }
}

TEST_F(MPITest, MpiFixlenOctetsTooSmall) {
  uint8_t buf[sizeof(mp_digit) * 3];
  std::vector<uint8_t> ref;
  for (size_t i = 0; i < sizeof(mp_digit) * 2; i++) {
    ref.push_back(3);  // Any non-zero value will do.
    dump("ref", ref.data(), ref.size());

    mp_int a;
    ASSERT_EQ(MP_OKAY, mp_init(&a));
    ASSERT_EQ(MP_OKAY, mp_read_unsigned_octets(&a, ref.data(), ref.size()));
#ifdef DEBUG
    // ARGCHK maps to assert() in a debug build.
    EXPECT_DEATH(mp_to_fixlen_octets(&a, buf, ref.size() - 1), "");
#else
    EXPECT_EQ(MP_BADARG, mp_to_fixlen_octets(&a, buf, ref.size() - 1));
#endif
    ASSERT_EQ(MP_OKAY, mp_to_fixlen_octets(&a, buf, ref.size()));
    ASSERT_EQ(0, memcmp(buf, ref.data(), ref.size()));

    mp_clear(&a);
  }
}

// This test is slow. Disable it by default so we can run these tests on CI.
class DISABLED_MPITest : public ::testing::Test {};

TEST_F(DISABLED_MPITest, MpiCmpConstTest) {
  mp_int a, b, c;
  MP_DIGITS(&a) = 0;
  MP_DIGITS(&b) = 0;
  MP_DIGITS(&c) = 0;
  ASSERT_EQ(MP_OKAY, mp_init(&a));
  ASSERT_EQ(MP_OKAY, mp_init(&b));
  ASSERT_EQ(MP_OKAY, mp_init(&c));

  mp_read_radix(
      &a,
      const_cast<char*>(
          "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551"),
      16);
  mp_read_radix(
      &b,
      const_cast<char*>(
          "FF0FFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551"),
      16);
  mp_read_radix(
      &c,
      const_cast<char*>(
          "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632550"),
      16);

#ifdef CT_VERIF
  mp_taint(&b);
  mp_taint(&c);
#endif

  uint32_t runs = 5000000;
  uint32_t time_b = 0, time_c = 0;
  for (uint32_t i = 0; i < runs; ++i) {
    struct timespec start, end;
    gettime(&start);
    int r = mp_cmp(&a, &b);
    gettime(&end);
    unsigned long long used = end.tv_sec * 1000000000L + end.tv_nsec;
    used -= static_cast<unsigned long long>(start.tv_sec * 1000000000L +
                                            start.tv_nsec);
    time_b += used;
    ASSERT_EQ(1, r);
  }
  printf("time b: %u\n", time_b / runs);

  for (uint32_t i = 0; i < runs; ++i) {
    struct timespec start, end;
    gettime(&start);
    int r = mp_cmp(&a, &c);
    gettime(&end);
    unsigned long long used = end.tv_sec * 1000000000L + end.tv_nsec;
    used -= static_cast<unsigned long long>(start.tv_sec * 1000000000L +
                                            start.tv_nsec);
    time_c += used;
    ASSERT_EQ(1, r);
  }
  printf("time c: %u\n", time_c / runs);

  mp_clear(&a);
  mp_clear(&b);
  mp_clear(&c);
}

}  // namespace nss_test