Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2014, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #include <stdio.h> |
| 16 | #include <string.h> |
| 17 | |
| 18 | #include <vector> |
| 19 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 20 | #include <gtest/gtest.h> |
| 21 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 22 | #include <openssl/bn.h> |
| 23 | #include <openssl/bytestring.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 24 | #include <openssl/crypto.h> |
| 25 | #include <openssl/ec_key.h> |
| 26 | #include <openssl/err.h> |
| 27 | #include <openssl/mem.h> |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 28 | #include <openssl/nid.h> |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 29 | #include <openssl/obj.h> |
| 30 | |
Robert Sloan | 8542c08 | 2018-02-05 09:07:34 -0800 | [diff] [blame] | 31 | #include "../bn/internal.h" |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 32 | #include "../../test/test_util.h" |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 33 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 34 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 35 | // kECKeyWithoutPublic is an ECPrivateKey with the optional publicKey field |
| 36 | // omitted. |
| 37 | static const uint8_t kECKeyWithoutPublic[] = { |
| 38 | 0x30, 0x31, 0x02, 0x01, 0x01, 0x04, 0x20, 0xc6, 0xc1, 0xaa, 0xda, 0x15, 0xb0, |
| 39 | 0x76, 0x61, 0xf8, 0x14, 0x2c, 0x6c, 0xaf, 0x0f, 0xdb, 0x24, 0x1a, 0xff, 0x2e, |
| 40 | 0xfe, 0x46, 0xc0, 0x93, 0x8b, 0x74, 0xf2, 0xbc, 0xc5, 0x30, 0x52, 0xb0, 0x77, |
| 41 | 0xa0, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, |
| 42 | }; |
| 43 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 44 | // kECKeySpecifiedCurve is the above key with P-256's parameters explicitly |
| 45 | // spelled out rather than using a named curve. |
| 46 | static const uint8_t kECKeySpecifiedCurve[] = { |
| 47 | 0x30, 0x82, 0x01, 0x22, 0x02, 0x01, 0x01, 0x04, 0x20, 0xc6, 0xc1, 0xaa, |
| 48 | 0xda, 0x15, 0xb0, 0x76, 0x61, 0xf8, 0x14, 0x2c, 0x6c, 0xaf, 0x0f, 0xdb, |
| 49 | 0x24, 0x1a, 0xff, 0x2e, 0xfe, 0x46, 0xc0, 0x93, 0x8b, 0x74, 0xf2, 0xbc, |
| 50 | 0xc5, 0x30, 0x52, 0xb0, 0x77, 0xa0, 0x81, 0xfa, 0x30, 0x81, 0xf7, 0x02, |
| 51 | 0x01, 0x01, 0x30, 0x2c, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x01, |
| 52 | 0x01, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x01, |
| 53 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 54 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 55 | 0x30, 0x5b, 0x04, 0x20, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x01, |
| 56 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 57 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, |
| 58 | 0x04, 0x20, 0x5a, 0xc6, 0x35, 0xd8, 0xaa, 0x3a, 0x93, 0xe7, 0xb3, 0xeb, |
| 59 | 0xbd, 0x55, 0x76, 0x98, 0x86, 0xbc, 0x65, 0x1d, 0x06, 0xb0, 0xcc, 0x53, |
| 60 | 0xb0, 0xf6, 0x3b, 0xce, 0x3c, 0x3e, 0x27, 0xd2, 0x60, 0x4b, 0x03, 0x15, |
| 61 | 0x00, 0xc4, 0x9d, 0x36, 0x08, 0x86, 0xe7, 0x04, 0x93, 0x6a, 0x66, 0x78, |
| 62 | 0xe1, 0x13, 0x9d, 0x26, 0xb7, 0x81, 0x9f, 0x7e, 0x90, 0x04, 0x41, 0x04, |
| 63 | 0x6b, 0x17, 0xd1, 0xf2, 0xe1, 0x2c, 0x42, 0x47, 0xf8, 0xbc, 0xe6, 0xe5, |
| 64 | 0x63, 0xa4, 0x40, 0xf2, 0x77, 0x03, 0x7d, 0x81, 0x2d, 0xeb, 0x33, 0xa0, |
| 65 | 0xf4, 0xa1, 0x39, 0x45, 0xd8, 0x98, 0xc2, 0x96, 0x4f, 0xe3, 0x42, 0xe2, |
| 66 | 0xfe, 0x1a, 0x7f, 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, 0x7c, 0x0f, 0x9e, 0x16, |
| 67 | 0x2b, 0xce, 0x33, 0x57, 0x6b, 0x31, 0x5e, 0xce, 0xcb, 0xb6, 0x40, 0x68, |
| 68 | 0x37, 0xbf, 0x51, 0xf5, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, |
| 69 | 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbc, |
| 70 | 0xe6, 0xfa, 0xad, 0xa7, 0x17, 0x9e, 0x84, 0xf3, 0xb9, 0xca, 0xc2, 0xfc, |
| 71 | 0x63, 0x25, 0x51, 0x02, 0x01, 0x01, |
| 72 | }; |
| 73 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 74 | // kECKeyMissingZeros is an ECPrivateKey containing a degenerate P-256 key where |
| 75 | // the private key is one. The private key is incorrectly encoded without zero |
| 76 | // padding. |
| 77 | static const uint8_t kECKeyMissingZeros[] = { |
| 78 | 0x30, 0x58, 0x02, 0x01, 0x01, 0x04, 0x01, 0x01, 0xa0, 0x0a, 0x06, 0x08, 0x2a, |
| 79 | 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0xa1, 0x44, 0x03, 0x42, 0x00, 0x04, |
| 80 | 0x6b, 0x17, 0xd1, 0xf2, 0xe1, 0x2c, 0x42, 0x47, 0xf8, 0xbc, 0xe6, 0xe5, 0x63, |
| 81 | 0xa4, 0x40, 0xf2, 0x77, 0x03, 0x7d, 0x81, 0x2d, 0xeb, 0x33, 0xa0, 0xf4, 0xa1, |
| 82 | 0x39, 0x45, 0xd8, 0x98, 0xc2, 0x96, 0x4f, 0xe3, 0x42, 0xe2, 0xfe, 0x1a, 0x7f, |
| 83 | 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, 0x7c, 0x0f, 0x9e, 0x16, 0x2b, 0xce, 0x33, 0x57, |
| 84 | 0x6b, 0x31, 0x5e, 0xce, 0xcb, 0xb6, 0x40, 0x68, 0x37, 0xbf, 0x51, 0xf5, |
| 85 | }; |
| 86 | |
| 87 | // kECKeyMissingZeros is an ECPrivateKey containing a degenerate P-256 key where |
| 88 | // the private key is one. The private key is encoded with the required zero |
| 89 | // padding. |
| 90 | static const uint8_t kECKeyWithZeros[] = { |
| 91 | 0x30, 0x77, 0x02, 0x01, 0x01, 0x04, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 92 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 93 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, |
| 94 | 0xa0, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0xa1, |
| 95 | 0x44, 0x03, 0x42, 0x00, 0x04, 0x6b, 0x17, 0xd1, 0xf2, 0xe1, 0x2c, 0x42, 0x47, |
| 96 | 0xf8, 0xbc, 0xe6, 0xe5, 0x63, 0xa4, 0x40, 0xf2, 0x77, 0x03, 0x7d, 0x81, 0x2d, |
| 97 | 0xeb, 0x33, 0xa0, 0xf4, 0xa1, 0x39, 0x45, 0xd8, 0x98, 0xc2, 0x96, 0x4f, 0xe3, |
| 98 | 0x42, 0xe2, 0xfe, 0x1a, 0x7f, 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, 0x7c, 0x0f, 0x9e, |
| 99 | 0x16, 0x2b, 0xce, 0x33, 0x57, 0x6b, 0x31, 0x5e, 0xce, 0xcb, 0xb6, 0x40, 0x68, |
| 100 | 0x37, 0xbf, 0x51, 0xf5, |
| 101 | }; |
| 102 | |
| 103 | // DecodeECPrivateKey decodes |in| as an ECPrivateKey structure and returns the |
| 104 | // result or nullptr on error. |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 105 | static bssl::UniquePtr<EC_KEY> DecodeECPrivateKey(const uint8_t *in, |
| 106 | size_t in_len) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 107 | CBS cbs; |
| 108 | CBS_init(&cbs, in, in_len); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 109 | bssl::UniquePtr<EC_KEY> ret(EC_KEY_parse_private_key(&cbs, NULL)); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 110 | if (!ret || CBS_len(&cbs) != 0) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 111 | return nullptr; |
| 112 | } |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | // EncodeECPrivateKey encodes |key| as an ECPrivateKey structure into |*out|. It |
| 117 | // returns true on success or false on error. |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 118 | static bool EncodeECPrivateKey(std::vector<uint8_t> *out, const EC_KEY *key) { |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 119 | bssl::ScopedCBB cbb; |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 120 | uint8_t *der; |
| 121 | size_t der_len; |
| 122 | if (!CBB_init(cbb.get(), 0) || |
| 123 | !EC_KEY_marshal_private_key(cbb.get(), key, EC_KEY_get_enc_flags(key)) || |
| 124 | !CBB_finish(cbb.get(), &der, &der_len)) { |
| 125 | return false; |
| 126 | } |
| 127 | out->assign(der, der + der_len); |
| 128 | OPENSSL_free(der); |
| 129 | return true; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 132 | TEST(ECTest, Encoding) { |
| 133 | bssl::UniquePtr<EC_KEY> key = |
| 134 | DecodeECPrivateKey(kECKeyWithoutPublic, sizeof(kECKeyWithoutPublic)); |
| 135 | ASSERT_TRUE(key); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 136 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 137 | // Test that the encoding round-trips. |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 138 | std::vector<uint8_t> out; |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 139 | ASSERT_TRUE(EncodeECPrivateKey(&out, key.get())); |
| 140 | EXPECT_EQ(Bytes(kECKeyWithoutPublic), Bytes(out.data(), out.size())); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 141 | |
| 142 | const EC_POINT *pub_key = EC_KEY_get0_public_key(key.get()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 143 | ASSERT_TRUE(pub_key) << "Public key missing"; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 144 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 145 | bssl::UniquePtr<BIGNUM> x(BN_new()); |
| 146 | bssl::UniquePtr<BIGNUM> y(BN_new()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 147 | ASSERT_TRUE(x); |
| 148 | ASSERT_TRUE(y); |
| 149 | ASSERT_TRUE(EC_POINT_get_affine_coordinates_GFp( |
| 150 | EC_KEY_get0_group(key.get()), pub_key, x.get(), y.get(), NULL)); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 151 | bssl::UniquePtr<char> x_hex(BN_bn2hex(x.get())); |
| 152 | bssl::UniquePtr<char> y_hex(BN_bn2hex(y.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 153 | ASSERT_TRUE(x_hex); |
| 154 | ASSERT_TRUE(y_hex); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 155 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 156 | EXPECT_STREQ( |
| 157 | "c81561ecf2e54edefe6617db1c7a34a70744ddb261f269b83dacfcd2ade5a681", |
| 158 | x_hex.get()); |
| 159 | EXPECT_STREQ( |
| 160 | "e0e2afa3f9b6abe4c698ef6495f1be49a3196c5056acb3763fe4507eec596e88", |
| 161 | y_hex.get()); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 162 | } |
| 163 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 164 | TEST(ECTest, ZeroPadding) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 165 | // Check that the correct encoding round-trips. |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 166 | bssl::UniquePtr<EC_KEY> key = |
| 167 | DecodeECPrivateKey(kECKeyWithZeros, sizeof(kECKeyWithZeros)); |
| 168 | ASSERT_TRUE(key); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 169 | std::vector<uint8_t> out; |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 170 | EXPECT_TRUE(EncodeECPrivateKey(&out, key.get())); |
| 171 | EXPECT_EQ(Bytes(kECKeyWithZeros), Bytes(out.data(), out.size())); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 172 | |
| 173 | // Keys without leading zeros also parse, but they encode correctly. |
| 174 | key = DecodeECPrivateKey(kECKeyMissingZeros, sizeof(kECKeyMissingZeros)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 175 | ASSERT_TRUE(key); |
| 176 | EXPECT_TRUE(EncodeECPrivateKey(&out, key.get())); |
| 177 | EXPECT_EQ(Bytes(kECKeyWithZeros), Bytes(out.data(), out.size())); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 180 | TEST(ECTest, SpecifiedCurve) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 181 | // Test keys with specified curves may be decoded. |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 182 | bssl::UniquePtr<EC_KEY> key = |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 183 | DecodeECPrivateKey(kECKeySpecifiedCurve, sizeof(kECKeySpecifiedCurve)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 184 | ASSERT_TRUE(key); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 185 | |
| 186 | // The group should have been interpreted as P-256. |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 187 | EXPECT_EQ(NID_X9_62_prime256v1, |
| 188 | EC_GROUP_get_curve_name(EC_KEY_get0_group(key.get()))); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 189 | |
| 190 | // Encoding the key should still use named form. |
| 191 | std::vector<uint8_t> out; |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 192 | EXPECT_TRUE(EncodeECPrivateKey(&out, key.get())); |
| 193 | EXPECT_EQ(Bytes(kECKeyWithoutPublic), Bytes(out.data(), out.size())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 194 | } |
| 195 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 196 | TEST(ECTest, ArbitraryCurve) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 197 | // Make a P-256 key and extract the affine coordinates. |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 198 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new_by_curve_name(NID_X9_62_prime256v1)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 199 | ASSERT_TRUE(key); |
| 200 | ASSERT_TRUE(EC_KEY_generate_key(key.get())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 201 | |
| 202 | // Make an arbitrary curve which is identical to P-256. |
| 203 | static const uint8_t kP[] = { |
| 204 | 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, |
| 205 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, |
| 206 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 207 | }; |
| 208 | static const uint8_t kA[] = { |
| 209 | 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, |
| 210 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, |
| 211 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, |
| 212 | }; |
| 213 | static const uint8_t kB[] = { |
| 214 | 0x5a, 0xc6, 0x35, 0xd8, 0xaa, 0x3a, 0x93, 0xe7, 0xb3, 0xeb, 0xbd, |
| 215 | 0x55, 0x76, 0x98, 0x86, 0xbc, 0x65, 0x1d, 0x06, 0xb0, 0xcc, 0x53, |
| 216 | 0xb0, 0xf6, 0x3b, 0xce, 0x3c, 0x3e, 0x27, 0xd2, 0x60, 0x4b, |
| 217 | }; |
| 218 | static const uint8_t kX[] = { |
| 219 | 0x6b, 0x17, 0xd1, 0xf2, 0xe1, 0x2c, 0x42, 0x47, 0xf8, 0xbc, 0xe6, |
| 220 | 0xe5, 0x63, 0xa4, 0x40, 0xf2, 0x77, 0x03, 0x7d, 0x81, 0x2d, 0xeb, |
| 221 | 0x33, 0xa0, 0xf4, 0xa1, 0x39, 0x45, 0xd8, 0x98, 0xc2, 0x96, |
| 222 | }; |
| 223 | static const uint8_t kY[] = { |
| 224 | 0x4f, 0xe3, 0x42, 0xe2, 0xfe, 0x1a, 0x7f, 0x9b, 0x8e, 0xe7, 0xeb, |
| 225 | 0x4a, 0x7c, 0x0f, 0x9e, 0x16, 0x2b, 0xce, 0x33, 0x57, 0x6b, 0x31, |
| 226 | 0x5e, 0xce, 0xcb, 0xb6, 0x40, 0x68, 0x37, 0xbf, 0x51, 0xf5, |
| 227 | }; |
| 228 | static const uint8_t kOrder[] = { |
| 229 | 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, |
| 230 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xbc, 0xe6, 0xfa, 0xad, 0xa7, 0x17, |
| 231 | 0x9e, 0x84, 0xf3, 0xb9, 0xca, 0xc2, 0xfc, 0x63, 0x25, 0x51, |
| 232 | }; |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 233 | bssl::UniquePtr<BN_CTX> ctx(BN_CTX_new()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 234 | ASSERT_TRUE(ctx); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 235 | bssl::UniquePtr<BIGNUM> p(BN_bin2bn(kP, sizeof(kP), nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 236 | ASSERT_TRUE(p); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 237 | bssl::UniquePtr<BIGNUM> a(BN_bin2bn(kA, sizeof(kA), nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 238 | ASSERT_TRUE(a); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 239 | bssl::UniquePtr<BIGNUM> b(BN_bin2bn(kB, sizeof(kB), nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 240 | ASSERT_TRUE(b); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 241 | bssl::UniquePtr<BIGNUM> gx(BN_bin2bn(kX, sizeof(kX), nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 242 | ASSERT_TRUE(gx); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 243 | bssl::UniquePtr<BIGNUM> gy(BN_bin2bn(kY, sizeof(kY), nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 244 | ASSERT_TRUE(gy); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 245 | bssl::UniquePtr<BIGNUM> order(BN_bin2bn(kOrder, sizeof(kOrder), nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 246 | ASSERT_TRUE(order); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 247 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 248 | bssl::UniquePtr<EC_GROUP> group( |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 249 | EC_GROUP_new_curve_GFp(p.get(), a.get(), b.get(), ctx.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 250 | ASSERT_TRUE(group); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 251 | bssl::UniquePtr<EC_POINT> generator(EC_POINT_new(group.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 252 | ASSERT_TRUE(generator); |
| 253 | ASSERT_TRUE(EC_POINT_set_affine_coordinates_GFp( |
| 254 | group.get(), generator.get(), gx.get(), gy.get(), ctx.get())); |
| 255 | ASSERT_TRUE(EC_GROUP_set_generator(group.get(), generator.get(), order.get(), |
| 256 | BN_value_one())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 257 | |
| 258 | // |group| should not have a curve name. |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 259 | EXPECT_EQ(NID_undef, EC_GROUP_get_curve_name(group.get())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 260 | |
| 261 | // Copy |key| to |key2| using |group|. |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 262 | bssl::UniquePtr<EC_KEY> key2(EC_KEY_new()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 263 | ASSERT_TRUE(key2); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 264 | bssl::UniquePtr<EC_POINT> point(EC_POINT_new(group.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 265 | ASSERT_TRUE(point); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 266 | bssl::UniquePtr<BIGNUM> x(BN_new()), y(BN_new()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 267 | ASSERT_TRUE(x); |
| 268 | ASSERT_TRUE(EC_KEY_set_group(key2.get(), group.get())); |
| 269 | ASSERT_TRUE( |
| 270 | EC_KEY_set_private_key(key2.get(), EC_KEY_get0_private_key(key.get()))); |
| 271 | ASSERT_TRUE(EC_POINT_get_affine_coordinates_GFp( |
| 272 | EC_KEY_get0_group(key.get()), EC_KEY_get0_public_key(key.get()), x.get(), |
| 273 | y.get(), nullptr)); |
| 274 | ASSERT_TRUE(EC_POINT_set_affine_coordinates_GFp(group.get(), point.get(), |
| 275 | x.get(), y.get(), nullptr)); |
| 276 | ASSERT_TRUE(EC_KEY_set_public_key(key2.get(), point.get())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 277 | |
| 278 | // The key must be valid according to the new group too. |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 279 | EXPECT_TRUE(EC_KEY_check_key(key2.get())); |
Robert Sloan | 29c1d2c | 2017-10-30 14:10:28 -0700 | [diff] [blame] | 280 | |
| 281 | // Make a second instance of |group|. |
| 282 | bssl::UniquePtr<EC_GROUP> group2( |
| 283 | EC_GROUP_new_curve_GFp(p.get(), a.get(), b.get(), ctx.get())); |
| 284 | ASSERT_TRUE(group2); |
| 285 | bssl::UniquePtr<EC_POINT> generator2(EC_POINT_new(group2.get())); |
| 286 | ASSERT_TRUE(generator2); |
| 287 | ASSERT_TRUE(EC_POINT_set_affine_coordinates_GFp( |
| 288 | group2.get(), generator2.get(), gx.get(), gy.get(), ctx.get())); |
| 289 | ASSERT_TRUE(EC_GROUP_set_generator(group2.get(), generator2.get(), |
| 290 | order.get(), BN_value_one())); |
| 291 | |
| 292 | EXPECT_EQ(0, EC_GROUP_cmp(group.get(), group.get(), NULL)); |
| 293 | EXPECT_EQ(0, EC_GROUP_cmp(group2.get(), group.get(), NULL)); |
| 294 | |
| 295 | // group3 uses the wrong generator. |
| 296 | bssl::UniquePtr<EC_GROUP> group3( |
| 297 | EC_GROUP_new_curve_GFp(p.get(), a.get(), b.get(), ctx.get())); |
| 298 | ASSERT_TRUE(group3); |
| 299 | bssl::UniquePtr<EC_POINT> generator3(EC_POINT_new(group3.get())); |
| 300 | ASSERT_TRUE(generator3); |
| 301 | ASSERT_TRUE(EC_POINT_set_affine_coordinates_GFp( |
| 302 | group3.get(), generator3.get(), x.get(), y.get(), ctx.get())); |
| 303 | ASSERT_TRUE(EC_GROUP_set_generator(group3.get(), generator3.get(), |
| 304 | order.get(), BN_value_one())); |
| 305 | |
| 306 | EXPECT_NE(0, EC_GROUP_cmp(group.get(), group3.get(), NULL)); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 307 | } |
| 308 | |
Robert Sloan | 0da4395 | 2018-01-03 15:13:14 -0800 | [diff] [blame] | 309 | TEST(ECTest, SetKeyWithoutGroup) { |
| 310 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new()); |
| 311 | ASSERT_TRUE(key); |
| 312 | |
| 313 | // Private keys may not be configured without a group. |
| 314 | EXPECT_FALSE(EC_KEY_set_private_key(key.get(), BN_value_one())); |
| 315 | |
| 316 | // Public keys may not be configured without a group. |
| 317 | bssl::UniquePtr<EC_GROUP> group( |
| 318 | EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1)); |
| 319 | ASSERT_TRUE(group); |
| 320 | EXPECT_FALSE( |
| 321 | EC_KEY_set_public_key(key.get(), EC_GROUP_get0_generator(group.get()))); |
| 322 | } |
| 323 | |
| 324 | TEST(ECTest, GroupMismatch) { |
| 325 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new_by_curve_name(NID_secp384r1)); |
| 326 | ASSERT_TRUE(key); |
| 327 | bssl::UniquePtr<EC_GROUP> p256( |
| 328 | EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1)); |
| 329 | ASSERT_TRUE(p256); |
| 330 | |
| 331 | // Changing a key's group is invalid. |
| 332 | EXPECT_FALSE(EC_KEY_set_group(key.get(), p256.get())); |
| 333 | |
| 334 | // Configuring a public key with the wrong group is invalid. |
| 335 | EXPECT_FALSE( |
| 336 | EC_KEY_set_public_key(key.get(), EC_GROUP_get0_generator(p256.get()))); |
| 337 | } |
| 338 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 339 | class ECCurveTest : public testing::TestWithParam<EC_builtin_curve> {}; |
| 340 | |
| 341 | TEST_P(ECCurveTest, SetAffine) { |
| 342 | // Generate an EC_KEY. |
| 343 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new_by_curve_name(GetParam().nid)); |
| 344 | ASSERT_TRUE(key); |
| 345 | ASSERT_TRUE(EC_KEY_generate_key(key.get())); |
| 346 | |
| 347 | const EC_GROUP *const group = EC_KEY_get0_group(key.get()); |
| 348 | EXPECT_TRUE( |
| 349 | EC_POINT_is_on_curve(group, EC_KEY_get0_public_key(key.get()), nullptr)); |
| 350 | |
| 351 | // Get the public key's coordinates. |
| 352 | bssl::UniquePtr<BIGNUM> x(BN_new()); |
| 353 | ASSERT_TRUE(x); |
| 354 | bssl::UniquePtr<BIGNUM> y(BN_new()); |
| 355 | ASSERT_TRUE(y); |
Robert Sloan | 0db7f54 | 2018-01-16 15:48:33 -0800 | [diff] [blame] | 356 | bssl::UniquePtr<BIGNUM> p(BN_new()); |
| 357 | ASSERT_TRUE(p); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 358 | EXPECT_TRUE(EC_POINT_get_affine_coordinates_GFp( |
| 359 | group, EC_KEY_get0_public_key(key.get()), x.get(), y.get(), nullptr)); |
Robert Sloan | 0db7f54 | 2018-01-16 15:48:33 -0800 | [diff] [blame] | 360 | EXPECT_TRUE( |
| 361 | EC_GROUP_get_curve_GFp(group, p.get(), nullptr, nullptr, nullptr)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 362 | |
| 363 | // Points on the curve should be accepted. |
| 364 | auto point = bssl::UniquePtr<EC_POINT>(EC_POINT_new(group)); |
| 365 | ASSERT_TRUE(point); |
| 366 | EXPECT_TRUE(EC_POINT_set_affine_coordinates_GFp(group, point.get(), x.get(), |
| 367 | y.get(), nullptr)); |
| 368 | |
| 369 | // Subtract one from |y| to make the point no longer on the curve. |
| 370 | EXPECT_TRUE(BN_sub(y.get(), y.get(), BN_value_one())); |
| 371 | |
| 372 | // Points not on the curve should be rejected. |
| 373 | bssl::UniquePtr<EC_POINT> invalid_point(EC_POINT_new(group)); |
| 374 | ASSERT_TRUE(invalid_point); |
| 375 | EXPECT_FALSE(EC_POINT_set_affine_coordinates_GFp(group, invalid_point.get(), |
| 376 | x.get(), y.get(), nullptr)); |
Robert Sloan | 0db7f54 | 2018-01-16 15:48:33 -0800 | [diff] [blame] | 377 | |
| 378 | // Coordinates out of range should be rejected. |
| 379 | EXPECT_TRUE(BN_add(y.get(), y.get(), BN_value_one())); |
| 380 | EXPECT_TRUE(BN_add(y.get(), y.get(), p.get())); |
| 381 | |
| 382 | EXPECT_FALSE(EC_POINT_set_affine_coordinates_GFp(group, invalid_point.get(), |
| 383 | x.get(), y.get(), nullptr)); |
| 384 | EXPECT_FALSE( |
| 385 | EC_KEY_set_public_key_affine_coordinates(key.get(), x.get(), y.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 386 | } |
| 387 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 388 | TEST_P(ECCurveTest, GenerateFIPS) { |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 389 | // Generate an EC_KEY. |
| 390 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new_by_curve_name(GetParam().nid)); |
| 391 | ASSERT_TRUE(key); |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame] | 392 | ASSERT_TRUE(EC_KEY_generate_key_fips(key.get())); |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 395 | TEST_P(ECCurveTest, AddingEqualPoints) { |
| 396 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new_by_curve_name(GetParam().nid)); |
| 397 | ASSERT_TRUE(key); |
| 398 | ASSERT_TRUE(EC_KEY_generate_key(key.get())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 399 | |
| 400 | const EC_GROUP *const group = EC_KEY_get0_group(key.get()); |
| 401 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 402 | bssl::UniquePtr<EC_POINT> p1(EC_POINT_new(group)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 403 | ASSERT_TRUE(p1); |
| 404 | ASSERT_TRUE(EC_POINT_copy(p1.get(), EC_KEY_get0_public_key(key.get()))); |
| 405 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 406 | bssl::UniquePtr<EC_POINT> p2(EC_POINT_new(group)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 407 | ASSERT_TRUE(p2); |
| 408 | ASSERT_TRUE(EC_POINT_copy(p2.get(), EC_KEY_get0_public_key(key.get()))); |
| 409 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 410 | bssl::UniquePtr<EC_POINT> double_p1(EC_POINT_new(group)); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 411 | ASSERT_TRUE(double_p1); |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 412 | bssl::UniquePtr<BN_CTX> ctx(BN_CTX_new()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 413 | ASSERT_TRUE(ctx); |
| 414 | ASSERT_TRUE(EC_POINT_dbl(group, double_p1.get(), p1.get(), ctx.get())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 415 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 416 | bssl::UniquePtr<EC_POINT> p1_plus_p2(EC_POINT_new(group)); |
| 417 | ASSERT_TRUE(p1_plus_p2); |
| 418 | ASSERT_TRUE( |
| 419 | EC_POINT_add(group, p1_plus_p2.get(), p1.get(), p2.get(), ctx.get())); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 420 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 421 | EXPECT_EQ(0, |
| 422 | EC_POINT_cmp(group, double_p1.get(), p1_plus_p2.get(), ctx.get())) |
| 423 | << "A+A != 2A"; |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 424 | } |
| 425 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 426 | TEST_P(ECCurveTest, MulZero) { |
| 427 | bssl::UniquePtr<EC_GROUP> group(EC_GROUP_new_by_curve_name(GetParam().nid)); |
| 428 | ASSERT_TRUE(group); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 429 | |
| 430 | bssl::UniquePtr<EC_POINT> point(EC_POINT_new(group.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 431 | ASSERT_TRUE(point); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 432 | bssl::UniquePtr<BIGNUM> zero(BN_new()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 433 | ASSERT_TRUE(zero); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 434 | BN_zero(zero.get()); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 435 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), zero.get(), nullptr, |
| 436 | nullptr, nullptr)); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 437 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 438 | EXPECT_TRUE(EC_POINT_is_at_infinity(group.get(), point.get())) |
| 439 | << "g * 0 did not return point at infinity."; |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 440 | |
| 441 | // Test that zero times an arbitrary point is also infinity. The generator is |
| 442 | // used as the arbitrary point. |
| 443 | bssl::UniquePtr<EC_POINT> generator(EC_POINT_new(group.get())); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 444 | ASSERT_TRUE(generator); |
| 445 | ASSERT_TRUE(EC_POINT_mul(group.get(), generator.get(), BN_value_one(), |
| 446 | nullptr, nullptr, nullptr)); |
| 447 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), nullptr, generator.get(), |
| 448 | zero.get(), nullptr)); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 449 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 450 | EXPECT_TRUE(EC_POINT_is_at_infinity(group.get(), point.get())) |
| 451 | << "p * 0 did not return point at infinity."; |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 452 | } |
| 453 | |
Robert Sloan | 99319a1 | 2017-11-27 10:32:46 -0800 | [diff] [blame] | 454 | // Test that multiplying by the order produces ∞ and, moreover, that callers may |
| 455 | // do so. |EC_POINT_mul| is almost exclusively used with reduced scalars, with |
| 456 | // this exception. This comes from consumers following NIST SP 800-56A section |
| 457 | // 5.6.2.3.2. (Though all our curves have cofactor one, so this check isn't |
| 458 | // useful.) |
| 459 | TEST_P(ECCurveTest, MulOrder) { |
| 460 | bssl::UniquePtr<EC_GROUP> group(EC_GROUP_new_by_curve_name(GetParam().nid)); |
| 461 | ASSERT_TRUE(group); |
| 462 | |
| 463 | // Test that g × order = ∞. |
| 464 | bssl::UniquePtr<EC_POINT> point(EC_POINT_new(group.get())); |
| 465 | ASSERT_TRUE(point); |
| 466 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), |
| 467 | EC_GROUP_get0_order(group.get()), nullptr, nullptr, |
| 468 | nullptr)); |
| 469 | |
| 470 | EXPECT_TRUE(EC_POINT_is_at_infinity(group.get(), point.get())) |
| 471 | << "g * order did not return point at infinity."; |
| 472 | |
| 473 | // Test that p × order = ∞, for some arbitrary p. |
| 474 | bssl::UniquePtr<BIGNUM> forty_two(BN_new()); |
| 475 | ASSERT_TRUE(forty_two); |
| 476 | ASSERT_TRUE(BN_set_word(forty_two.get(), 42)); |
| 477 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), forty_two.get(), nullptr, |
| 478 | nullptr, nullptr)); |
| 479 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), nullptr, point.get(), |
| 480 | EC_GROUP_get0_order(group.get()), nullptr)); |
| 481 | |
| 482 | EXPECT_TRUE(EC_POINT_is_at_infinity(group.get(), point.get())) |
| 483 | << "p * order did not return point at infinity."; |
| 484 | } |
| 485 | |
Robert Sloan | a815d5a | 2017-12-04 11:49:16 -0800 | [diff] [blame] | 486 | // Test that |EC_POINT_mul| works with out-of-range scalars. Even beyond the |
| 487 | // usual |bn_correct_top| disclaimer, we completely disclaim all hope here as a |
| 488 | // reduction is needed, but we'll compute the right answer. |
| 489 | TEST_P(ECCurveTest, MulOutOfRange) { |
| 490 | bssl::UniquePtr<EC_GROUP> group(EC_GROUP_new_by_curve_name(GetParam().nid)); |
| 491 | ASSERT_TRUE(group); |
| 492 | |
| 493 | bssl::UniquePtr<BIGNUM> n_minus_one(BN_dup(EC_GROUP_get0_order(group.get()))); |
| 494 | ASSERT_TRUE(n_minus_one); |
| 495 | ASSERT_TRUE(BN_sub_word(n_minus_one.get(), 1)); |
| 496 | |
| 497 | bssl::UniquePtr<BIGNUM> minus_one(BN_new()); |
| 498 | ASSERT_TRUE(minus_one); |
| 499 | ASSERT_TRUE(BN_one(minus_one.get())); |
| 500 | BN_set_negative(minus_one.get(), 1); |
| 501 | |
| 502 | bssl::UniquePtr<BIGNUM> seven(BN_new()); |
| 503 | ASSERT_TRUE(seven); |
| 504 | ASSERT_TRUE(BN_set_word(seven.get(), 7)); |
| 505 | |
| 506 | bssl::UniquePtr<BIGNUM> ten_n_plus_seven( |
| 507 | BN_dup(EC_GROUP_get0_order(group.get()))); |
| 508 | ASSERT_TRUE(ten_n_plus_seven); |
| 509 | ASSERT_TRUE(BN_mul_word(ten_n_plus_seven.get(), 10)); |
| 510 | ASSERT_TRUE(BN_add_word(ten_n_plus_seven.get(), 7)); |
| 511 | |
| 512 | bssl::UniquePtr<EC_POINT> point1(EC_POINT_new(group.get())), |
| 513 | point2(EC_POINT_new(group.get())); |
| 514 | ASSERT_TRUE(point1); |
| 515 | ASSERT_TRUE(point2); |
| 516 | |
| 517 | ASSERT_TRUE(EC_POINT_mul(group.get(), point1.get(), n_minus_one.get(), |
| 518 | nullptr, nullptr, nullptr)); |
| 519 | ASSERT_TRUE(EC_POINT_mul(group.get(), point2.get(), minus_one.get(), nullptr, |
| 520 | nullptr, nullptr)); |
| 521 | EXPECT_EQ(0, EC_POINT_cmp(group.get(), point1.get(), point2.get(), nullptr)) |
| 522 | << "-1 * G and (n-1) * G did not give the same result"; |
| 523 | |
| 524 | ASSERT_TRUE(EC_POINT_mul(group.get(), point1.get(), seven.get(), nullptr, |
| 525 | nullptr, nullptr)); |
| 526 | ASSERT_TRUE(EC_POINT_mul(group.get(), point2.get(), ten_n_plus_seven.get(), |
| 527 | nullptr, nullptr, nullptr)); |
| 528 | EXPECT_EQ(0, EC_POINT_cmp(group.get(), point1.get(), point2.get(), nullptr)) |
| 529 | << "7 * G and (10n + 7) * G did not give the same result"; |
| 530 | } |
| 531 | |
Robert Sloan | a12bf46 | 2017-07-17 07:08:26 -0700 | [diff] [blame] | 532 | // Test that 10×∞ + G = G. |
| 533 | TEST_P(ECCurveTest, Mul) { |
| 534 | bssl::UniquePtr<EC_GROUP> group(EC_GROUP_new_by_curve_name(GetParam().nid)); |
| 535 | ASSERT_TRUE(group); |
| 536 | bssl::UniquePtr<EC_POINT> p(EC_POINT_new(group.get())); |
| 537 | ASSERT_TRUE(p); |
| 538 | bssl::UniquePtr<EC_POINT> result(EC_POINT_new(group.get())); |
| 539 | ASSERT_TRUE(result); |
| 540 | bssl::UniquePtr<BIGNUM> n(BN_new()); |
| 541 | ASSERT_TRUE(n); |
| 542 | ASSERT_TRUE(EC_POINT_set_to_infinity(group.get(), p.get())); |
| 543 | ASSERT_TRUE(BN_set_word(n.get(), 10)); |
| 544 | |
| 545 | // First check that 10×∞ = ∞. |
| 546 | ASSERT_TRUE(EC_POINT_mul(group.get(), result.get(), nullptr, p.get(), n.get(), |
| 547 | nullptr)); |
| 548 | EXPECT_TRUE(EC_POINT_is_at_infinity(group.get(), result.get())); |
| 549 | |
| 550 | // Now check that 10×∞ + G = G. |
| 551 | const EC_POINT *generator = EC_GROUP_get0_generator(group.get()); |
| 552 | ASSERT_TRUE(EC_POINT_mul(group.get(), result.get(), BN_value_one(), p.get(), |
| 553 | n.get(), nullptr)); |
| 554 | EXPECT_EQ(0, EC_POINT_cmp(group.get(), result.get(), generator, nullptr)); |
| 555 | } |
| 556 | |
Robert Sloan | 8542c08 | 2018-02-05 09:07:34 -0800 | [diff] [blame] | 557 | #if !defined(BORINGSSL_SHARED_LIBRARY) |
| 558 | TEST_P(ECCurveTest, MulNonMinimal) { |
| 559 | bssl::UniquePtr<EC_GROUP> group(EC_GROUP_new_by_curve_name(GetParam().nid)); |
| 560 | ASSERT_TRUE(group); |
| 561 | |
| 562 | bssl::UniquePtr<BIGNUM> forty_two(BN_new()); |
| 563 | ASSERT_TRUE(forty_two); |
| 564 | ASSERT_TRUE(BN_set_word(forty_two.get(), 42)); |
| 565 | |
| 566 | // Compute g × 42. |
| 567 | bssl::UniquePtr<EC_POINT> point(EC_POINT_new(group.get())); |
| 568 | ASSERT_TRUE(point); |
| 569 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), forty_two.get(), nullptr, |
| 570 | nullptr, nullptr)); |
| 571 | |
| 572 | // Compute it again with a non-minimal 42, much larger than the scalar. |
| 573 | ASSERT_TRUE(bn_resize_words(forty_two.get(), 64)); |
| 574 | |
| 575 | bssl::UniquePtr<EC_POINT> point2(EC_POINT_new(group.get())); |
| 576 | ASSERT_TRUE(point2); |
| 577 | ASSERT_TRUE(EC_POINT_mul(group.get(), point2.get(), forty_two.get(), nullptr, |
| 578 | nullptr, nullptr)); |
| 579 | EXPECT_EQ(0, EC_POINT_cmp(group.get(), point.get(), point2.get(), nullptr)); |
| 580 | } |
| 581 | #endif // BORINGSSL_SHARED_LIBRARY |
| 582 | |
Robert Sloan | cd79cde | 2017-12-11 09:06:12 -0800 | [diff] [blame] | 583 | // Test that EC_KEY_set_private_key rejects invalid values. |
| 584 | TEST_P(ECCurveTest, SetInvalidPrivateKey) { |
| 585 | bssl::UniquePtr<EC_KEY> key(EC_KEY_new_by_curve_name(GetParam().nid)); |
| 586 | ASSERT_TRUE(key); |
| 587 | |
| 588 | bssl::UniquePtr<BIGNUM> bn(BN_new()); |
| 589 | ASSERT_TRUE(BN_one(bn.get())); |
| 590 | BN_set_negative(bn.get(), 1); |
| 591 | EXPECT_FALSE(EC_KEY_set_private_key(key.get(), bn.get())) |
| 592 | << "Unexpectedly set a key of -1"; |
| 593 | ERR_clear_error(); |
| 594 | |
| 595 | ASSERT_TRUE( |
| 596 | BN_copy(bn.get(), EC_GROUP_get0_order(EC_KEY_get0_group(key.get())))); |
| 597 | EXPECT_FALSE(EC_KEY_set_private_key(key.get(), bn.get())) |
| 598 | << "Unexpectedly set a key of the group order."; |
| 599 | ERR_clear_error(); |
| 600 | } |
| 601 | |
Robert Sloan | 8542c08 | 2018-02-05 09:07:34 -0800 | [diff] [blame] | 602 | TEST_P(ECCurveTest, IgnoreOct2PointReturnValue) { |
| 603 | bssl::UniquePtr<EC_GROUP> group(EC_GROUP_new_by_curve_name(GetParam().nid)); |
| 604 | ASSERT_TRUE(group); |
| 605 | |
| 606 | bssl::UniquePtr<BIGNUM> forty_two(BN_new()); |
| 607 | ASSERT_TRUE(forty_two); |
| 608 | ASSERT_TRUE(BN_set_word(forty_two.get(), 42)); |
| 609 | |
| 610 | // Compute g × 42. |
| 611 | bssl::UniquePtr<EC_POINT> point(EC_POINT_new(group.get())); |
| 612 | ASSERT_TRUE(point); |
| 613 | ASSERT_TRUE(EC_POINT_mul(group.get(), point.get(), forty_two.get(), nullptr, |
| 614 | nullptr, nullptr)); |
| 615 | |
| 616 | // Serialize the point. |
| 617 | size_t serialized_len = |
| 618 | EC_POINT_point2oct(group.get(), point.get(), |
| 619 | POINT_CONVERSION_UNCOMPRESSED, nullptr, 0, nullptr); |
| 620 | ASSERT_NE(0u, serialized_len); |
| 621 | |
| 622 | std::vector<uint8_t> serialized(serialized_len); |
| 623 | ASSERT_EQ(serialized_len, |
| 624 | EC_POINT_point2oct(group.get(), point.get(), |
| 625 | POINT_CONVERSION_UNCOMPRESSED, serialized.data(), |
| 626 | serialized_len, nullptr)); |
| 627 | |
| 628 | // Create a serialized point that is not on the curve. |
| 629 | serialized[serialized_len - 1]++; |
| 630 | |
| 631 | ASSERT_FALSE(EC_POINT_oct2point(group.get(), point.get(), serialized.data(), |
| 632 | serialized.size(), nullptr)); |
| 633 | // After a failure, |point| should have been set to the generator to defend |
| 634 | // against code that doesn't check the return value. |
| 635 | ASSERT_EQ(0, EC_POINT_cmp(group.get(), point.get(), |
| 636 | EC_GROUP_get0_generator(group.get()), nullptr)); |
| 637 | } |
| 638 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 639 | static std::vector<EC_builtin_curve> AllCurves() { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 640 | const size_t num_curves = EC_get_builtin_curves(nullptr, 0); |
| 641 | std::vector<EC_builtin_curve> curves(num_curves); |
| 642 | EC_get_builtin_curves(curves.data(), num_curves); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 643 | return curves; |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 644 | } |
| 645 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 646 | static std::string CurveToString( |
| 647 | const testing::TestParamInfo<EC_builtin_curve> ¶ms) { |
| 648 | // The comment field contains characters GTest rejects, so use the OBJ name. |
| 649 | return OBJ_nid2sn(params.param.nid); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 650 | } |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 651 | |
| 652 | INSTANTIATE_TEST_CASE_P(, ECCurveTest, testing::ValuesIn(AllCurves()), |
| 653 | CurveToString); |