Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person |
| 5 | * obtaining a copy of this software and associated documentation |
| 6 | * files (the "Software"), to deal in the Software without |
| 7 | * restriction, including without limitation the rights to use, copy, |
| 8 | * modify, merge, publish, distribute, sublicense, and/or sell copies |
| 9 | * of the Software, and to permit persons to whom the Software is |
| 10 | * furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 18 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 19 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 20 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 21 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include <base/files/file_util.h> |
| 29 | #include <gtest/gtest.h> |
| 30 | #include <openssl/objects.h> |
| 31 | #include <openssl/pem.h> |
| 32 | #include <openssl/rsa.h> |
| 33 | #include <openssl/sha.h> |
| 34 | |
| 35 | #include <libavb_atx/libavb_atx.h> |
| 36 | |
| 37 | #include "avb_unittest_util.h" |
| 38 | #include "fake_avb_ops.h" |
| 39 | |
| 40 | namespace { |
| 41 | |
| 42 | const char kMetadataPath[] = "test/data/atx_metadata.bin"; |
| 43 | const char kPermanentAttributesPath[] = |
| 44 | "test/data/atx_permanent_attributes.bin"; |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 45 | const char kPRKPrivateKeyPath[] = "test/data/testkey_atx_prk.pem"; |
| 46 | const char kPIKPrivateKeyPath[] = "test/data/testkey_atx_pik.pem"; |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 47 | |
| 48 | class ScopedRSA { |
| 49 | public: |
| 50 | ScopedRSA(const char* pem_key_path) { |
| 51 | FILE* file = fopen(pem_key_path, "r"); |
| 52 | rsa_ = PEM_read_RSAPrivateKey(file, nullptr, nullptr, nullptr); |
| 53 | fclose(file); |
| 54 | } |
| 55 | |
| 56 | ~ScopedRSA() { |
| 57 | if (rsa_) { |
| 58 | RSA_free(rsa_); |
| 59 | } |
| 60 | } |
| 61 | |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 62 | // PKCS #1 v1.5 signature using SHA512. Returns true on success. |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 63 | bool Sign(const void* data_to_sign, size_t length, uint8_t signature[]) { |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 64 | uint8_t digest[AVB_SHA512_DIGEST_SIZE]; |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 65 | const unsigned char* data_to_sign_buf = |
| 66 | reinterpret_cast<const unsigned char*>(data_to_sign); |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 67 | SHA512(data_to_sign_buf, length, digest); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 68 | unsigned int signature_length = 0; |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 69 | return (1 == RSA_sign(NID_sha512, |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 70 | digest, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 71 | AVB_SHA512_DIGEST_SIZE, |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 72 | signature, |
| 73 | &signature_length, |
| 74 | rsa_)); |
| 75 | } |
| 76 | |
| 77 | private: |
| 78 | RSA* rsa_; |
| 79 | }; |
| 80 | |
| 81 | } /* namespace */ |
| 82 | |
| 83 | namespace avb { |
| 84 | |
| 85 | class AvbAtxValidateTest : public ::testing::Test, public FakeAvbOpsDelegate { |
| 86 | public: |
| 87 | ~AvbAtxValidateTest() override {} |
| 88 | |
| 89 | void SetUp() override { |
| 90 | ReadDefaultData(); |
| 91 | ops_.set_delegate(this); |
| 92 | ops_.set_permanent_attributes(attributes_); |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 93 | ops_.set_stored_rollback_indexes( |
| 94 | {{AVB_ATX_PIK_VERSION_LOCATION, 0}, {AVB_ATX_PSK_VERSION_LOCATION, 0}}); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | // FakeAvbOpsDelegate methods. |
| 98 | AvbIOResult read_from_partition(const char* partition, |
| 99 | int64_t offset, |
| 100 | size_t num_bytes, |
| 101 | void* buffer, |
| 102 | size_t* out_num_read) override { |
| 103 | // Expect method not used. |
| 104 | return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION; |
| 105 | } |
| 106 | |
| 107 | AvbIOResult write_to_partition(const char* partition, |
| 108 | int64_t offset, |
| 109 | size_t num_bytes, |
| 110 | const void* buffer) override { |
| 111 | // Expect method not used. |
| 112 | return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION; |
| 113 | } |
| 114 | |
| 115 | AvbIOResult validate_vbmeta_public_key(AvbOps* ops, |
| 116 | const uint8_t* public_key_data, |
| 117 | size_t public_key_length, |
| 118 | const uint8_t* public_key_metadata, |
| 119 | size_t public_key_metadata_length, |
| 120 | bool* out_key_is_trusted) override { |
| 121 | // Expect method not used. |
| 122 | return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION; |
| 123 | } |
| 124 | |
| 125 | AvbIOResult read_rollback_index(AvbOps* ops, |
| 126 | size_t rollback_index_slot, |
| 127 | uint64_t* out_rollback_index) override { |
| 128 | if ((fail_read_pik_rollback_index_ && |
| 129 | rollback_index_slot == AVB_ATX_PIK_VERSION_LOCATION) || |
| 130 | (fail_read_psk_rollback_index_ && |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 131 | rollback_index_slot == AVB_ATX_PSK_VERSION_LOCATION)) { |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 132 | return AVB_IO_RESULT_ERROR_IO; |
| 133 | } |
| 134 | return ops_.read_rollback_index( |
| 135 | ops, rollback_index_slot, out_rollback_index); |
| 136 | } |
| 137 | |
| 138 | AvbIOResult write_rollback_index(AvbOps* ops, |
| 139 | size_t rollback_index_slot, |
| 140 | uint64_t rollback_index) override { |
| 141 | // Expect method not used. |
| 142 | return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION; |
| 143 | } |
| 144 | |
| 145 | AvbIOResult read_is_device_unlocked(AvbOps* ops, |
| 146 | bool* out_is_device_unlocked) override { |
| 147 | // Expect method not used. |
| 148 | return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION; |
| 149 | } |
| 150 | |
| 151 | AvbIOResult get_unique_guid_for_partition(AvbOps* ops, |
| 152 | const char* partition, |
| 153 | char* guid_buf, |
| 154 | size_t guid_buf_size) override { |
| 155 | // Expect method not used. |
| 156 | return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION; |
| 157 | } |
| 158 | |
| 159 | AvbIOResult read_permanent_attributes( |
| 160 | AvbAtxPermanentAttributes* attributes) override { |
| 161 | if (fail_read_permanent_attributes_) { |
| 162 | return AVB_IO_RESULT_ERROR_IO; |
| 163 | } |
| 164 | return ops_.read_permanent_attributes(attributes); |
| 165 | } |
| 166 | |
| 167 | AvbIOResult read_permanent_attributes_hash( |
| 168 | uint8_t hash[AVB_SHA256_DIGEST_SIZE]) override { |
| 169 | if (fail_read_permanent_attributes_hash_) { |
| 170 | return AVB_IO_RESULT_ERROR_IO; |
| 171 | } |
| 172 | return ops_.read_permanent_attributes_hash(hash); |
| 173 | } |
| 174 | |
| 175 | protected: |
| 176 | virtual AvbIOResult Validate(bool* is_trusted) { |
| 177 | return avb_atx_validate_vbmeta_public_key( |
| 178 | ops_.avb_ops(), |
| 179 | metadata_.product_signing_key_certificate.signed_data.public_key, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 180 | AVB_ATX_PUBLIC_KEY_SIZE, |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 181 | reinterpret_cast<const uint8_t*>(&metadata_), |
| 182 | sizeof(metadata_), |
| 183 | is_trusted); |
| 184 | } |
| 185 | |
| 186 | void SignPIKCertificate() { |
| 187 | memset(metadata_.product_intermediate_key_certificate.signature, |
| 188 | 0, |
| 189 | AVB_RSA4096_NUM_BYTES); |
| 190 | ScopedRSA key(kPRKPrivateKeyPath); |
| 191 | ASSERT_TRUE( |
| 192 | key.Sign(&metadata_.product_intermediate_key_certificate.signed_data, |
| 193 | sizeof(AvbAtxCertificateSignedData), |
| 194 | metadata_.product_intermediate_key_certificate.signature)); |
| 195 | } |
| 196 | |
| 197 | void SignPSKCertificate() { |
| 198 | memset(metadata_.product_signing_key_certificate.signature, |
| 199 | 0, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 200 | AVB_RSA4096_NUM_BYTES); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 201 | ScopedRSA key(kPIKPrivateKeyPath); |
| 202 | ASSERT_TRUE(key.Sign(&metadata_.product_signing_key_certificate.signed_data, |
| 203 | sizeof(AvbAtxCertificateSignedData), |
| 204 | metadata_.product_signing_key_certificate.signature)); |
| 205 | } |
| 206 | |
| 207 | FakeAvbOps ops_; |
| 208 | AvbAtxPermanentAttributes attributes_; |
| 209 | AvbAtxPublicKeyMetadata metadata_; |
| 210 | bool fail_read_permanent_attributes_{false}; |
| 211 | bool fail_read_permanent_attributes_hash_{false}; |
| 212 | bool fail_read_pik_rollback_index_{false}; |
| 213 | bool fail_read_psk_rollback_index_{false}; |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 214 | |
| 215 | private: |
| 216 | void ReadDefaultData() { |
| 217 | std::string tmp; |
| 218 | ASSERT_TRUE(base::ReadFileToString(base::FilePath(kMetadataPath), &tmp)); |
| 219 | ASSERT_EQ(tmp.size(), sizeof(AvbAtxPublicKeyMetadata)); |
| 220 | memcpy(&metadata_, tmp.data(), tmp.size()); |
| 221 | ASSERT_TRUE( |
| 222 | base::ReadFileToString(base::FilePath(kPermanentAttributesPath), &tmp)); |
| 223 | ASSERT_EQ(tmp.size(), sizeof(AvbAtxPermanentAttributes)); |
| 224 | memcpy(&attributes_, tmp.data(), tmp.size()); |
| 225 | } |
| 226 | }; |
| 227 | |
| 228 | TEST_F(AvbAtxValidateTest, Success) { |
| 229 | bool is_trusted = false; |
| 230 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 231 | EXPECT_TRUE(is_trusted); |
| 232 | } |
| 233 | |
| 234 | TEST_F(AvbAtxValidateTest, SuccessAfterNewSign) { |
| 235 | std::string old_pik_sig( |
| 236 | reinterpret_cast<char*>( |
| 237 | metadata_.product_intermediate_key_certificate.signature), |
| 238 | AVB_RSA4096_NUM_BYTES); |
| 239 | std::string old_psk_sig( |
| 240 | reinterpret_cast<char*>( |
| 241 | metadata_.product_signing_key_certificate.signature), |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 242 | AVB_RSA4096_NUM_BYTES); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 243 | SignPIKCertificate(); |
| 244 | SignPSKCertificate(); |
| 245 | std::string new_pik_sig( |
| 246 | reinterpret_cast<char*>( |
| 247 | metadata_.product_intermediate_key_certificate.signature), |
| 248 | AVB_RSA4096_NUM_BYTES); |
| 249 | std::string new_psk_sig( |
| 250 | reinterpret_cast<char*>( |
| 251 | metadata_.product_signing_key_certificate.signature), |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 252 | AVB_RSA4096_NUM_BYTES); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 253 | EXPECT_EQ(old_pik_sig, new_pik_sig); |
| 254 | EXPECT_EQ(old_psk_sig, new_psk_sig); |
| 255 | bool is_trusted = false; |
| 256 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 257 | EXPECT_TRUE(is_trusted); |
| 258 | } |
| 259 | |
| 260 | TEST_F(AvbAtxValidateTest, FailReadPermamentAttributes) { |
| 261 | fail_read_permanent_attributes_ = true; |
| 262 | bool is_trusted = true; |
| 263 | EXPECT_EQ(AVB_IO_RESULT_ERROR_IO, Validate(&is_trusted)); |
| 264 | EXPECT_FALSE(is_trusted); |
| 265 | } |
| 266 | |
| 267 | TEST_F(AvbAtxValidateTest, FailReadPermamentAttributesHash) { |
| 268 | fail_read_permanent_attributes_hash_ = true; |
| 269 | bool is_trusted = true; |
| 270 | EXPECT_EQ(AVB_IO_RESULT_ERROR_IO, Validate(&is_trusted)); |
| 271 | EXPECT_FALSE(is_trusted); |
| 272 | } |
| 273 | |
| 274 | TEST_F(AvbAtxValidateTest, UnsupportedPermanentAttributesVersion) { |
| 275 | attributes_.version = 25; |
| 276 | ops_.set_permanent_attributes(attributes_); |
| 277 | bool is_trusted = true; |
| 278 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 279 | EXPECT_FALSE(is_trusted); |
| 280 | } |
| 281 | |
| 282 | TEST_F(AvbAtxValidateTest, PermanentAttributesHashMismatch) { |
| 283 | ops_.set_permanent_attributes_hash("bad_hash"); |
| 284 | bool is_trusted = true; |
| 285 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 286 | EXPECT_FALSE(is_trusted); |
| 287 | } |
| 288 | |
| 289 | // A fixture with parameterized metadata length. |
| 290 | class AvbAtxValidateTestWithMetadataLength |
| 291 | : public AvbAtxValidateTest, |
| 292 | public ::testing::WithParamInterface<size_t> { |
| 293 | protected: |
| 294 | AvbIOResult Validate(bool* is_trusted) override { |
| 295 | return avb_atx_validate_vbmeta_public_key( |
| 296 | ops_.avb_ops(), |
| 297 | metadata_.product_signing_key_certificate.signed_data.public_key, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 298 | AVB_ATX_PUBLIC_KEY_SIZE, |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 299 | reinterpret_cast<const uint8_t*>(&metadata_), |
| 300 | GetParam(), |
| 301 | is_trusted); |
| 302 | } |
| 303 | }; |
| 304 | |
| 305 | TEST_P(AvbAtxValidateTestWithMetadataLength, InvalidMetadataLength) { |
| 306 | bool is_trusted = true; |
| 307 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 308 | EXPECT_FALSE(is_trusted); |
| 309 | } |
| 310 | |
| 311 | // Test a bunch of invalid metadata length values. |
| 312 | INSTANTIATE_TEST_CASE_P(P, |
| 313 | AvbAtxValidateTestWithMetadataLength, |
| 314 | ::testing::Values(0, |
| 315 | 1, |
| 316 | sizeof(AvbAtxPublicKeyMetadata) - 1, |
| 317 | sizeof(AvbAtxPublicKeyMetadata) + 1, |
| 318 | -1)); |
| 319 | |
| 320 | TEST_F(AvbAtxValidateTest, UnsupportedMetadataVersion) { |
| 321 | metadata_.version = 25; |
| 322 | bool is_trusted = true; |
| 323 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 324 | EXPECT_FALSE(is_trusted); |
| 325 | } |
| 326 | |
| 327 | TEST_F(AvbAtxValidateTest, FailReadPIKRollbackIndex) { |
| 328 | fail_read_pik_rollback_index_ = true; |
| 329 | bool is_trusted = true; |
| 330 | EXPECT_EQ(AVB_IO_RESULT_ERROR_IO, Validate(&is_trusted)); |
| 331 | EXPECT_FALSE(is_trusted); |
| 332 | } |
| 333 | |
| 334 | TEST_F(AvbAtxValidateTest, UnsupportedPIKCertificateVersion) { |
| 335 | metadata_.product_intermediate_key_certificate.signed_data.version = 25; |
| 336 | SignPIKCertificate(); |
| 337 | bool is_trusted = true; |
| 338 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 339 | EXPECT_FALSE(is_trusted); |
| 340 | } |
| 341 | |
| 342 | TEST_F(AvbAtxValidateTest, BadPIKCert_ModifiedSubjectPublicKey) { |
| 343 | metadata_.product_intermediate_key_certificate.signed_data.public_key[0] ^= 1; |
| 344 | bool is_trusted = true; |
| 345 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 346 | EXPECT_FALSE(is_trusted); |
| 347 | } |
| 348 | |
| 349 | TEST_F(AvbAtxValidateTest, BadPIKCert_ModifiedSubject) { |
| 350 | metadata_.product_intermediate_key_certificate.signed_data.subject[0] ^= 1; |
| 351 | bool is_trusted = true; |
| 352 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 353 | EXPECT_FALSE(is_trusted); |
| 354 | } |
| 355 | |
| 356 | TEST_F(AvbAtxValidateTest, BadPIKCert_ModifiedUsage) { |
| 357 | metadata_.product_intermediate_key_certificate.signed_data.usage[0] ^= 1; |
| 358 | bool is_trusted = true; |
| 359 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 360 | EXPECT_FALSE(is_trusted); |
| 361 | } |
| 362 | |
| 363 | TEST_F(AvbAtxValidateTest, BadPIKCert_ModifiedKeyVersion) { |
| 364 | metadata_.product_intermediate_key_certificate.signed_data.key_version ^= 1; |
| 365 | bool is_trusted = true; |
| 366 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 367 | EXPECT_FALSE(is_trusted); |
| 368 | } |
| 369 | |
| 370 | TEST_F(AvbAtxValidateTest, BadPIKCert_BadSignature) { |
| 371 | metadata_.product_intermediate_key_certificate.signature[0] ^= 1; |
| 372 | bool is_trusted = true; |
| 373 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 374 | EXPECT_FALSE(is_trusted); |
| 375 | } |
| 376 | |
| 377 | TEST_F(AvbAtxValidateTest, PIKCertSubjectIgnored) { |
| 378 | metadata_.product_intermediate_key_certificate.signed_data.subject[0] ^= 1; |
| 379 | SignPIKCertificate(); |
| 380 | bool is_trusted = false; |
| 381 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 382 | EXPECT_TRUE(is_trusted); |
| 383 | } |
| 384 | |
| 385 | TEST_F(AvbAtxValidateTest, PIKCertUnexpectedUsage) { |
| 386 | metadata_.product_intermediate_key_certificate.signed_data.usage[0] ^= 1; |
| 387 | SignPIKCertificate(); |
| 388 | bool is_trusted = true; |
| 389 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 390 | EXPECT_FALSE(is_trusted); |
| 391 | } |
| 392 | |
| 393 | TEST_F(AvbAtxValidateTest, PIKRollback) { |
| 394 | ops_.set_stored_rollback_indexes( |
| 395 | {{AVB_ATX_PIK_VERSION_LOCATION, |
| 396 | metadata_.product_intermediate_key_certificate.signed_data.key_version + |
| 397 | 1}, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 398 | {AVB_ATX_PSK_VERSION_LOCATION, 0}}); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 399 | bool is_trusted = true; |
| 400 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 401 | EXPECT_FALSE(is_trusted); |
| 402 | } |
| 403 | |
| 404 | TEST_F(AvbAtxValidateTest, FailReadPSKRollbackIndex) { |
| 405 | fail_read_psk_rollback_index_ = true; |
| 406 | bool is_trusted = true; |
| 407 | EXPECT_EQ(AVB_IO_RESULT_ERROR_IO, Validate(&is_trusted)); |
| 408 | EXPECT_FALSE(is_trusted); |
| 409 | } |
| 410 | |
| 411 | TEST_F(AvbAtxValidateTest, UnsupportedPSKCertificateVersion) { |
| 412 | metadata_.product_signing_key_certificate.signed_data.version = 25; |
| 413 | SignPSKCertificate(); |
| 414 | bool is_trusted = true; |
| 415 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 416 | EXPECT_FALSE(is_trusted); |
| 417 | } |
| 418 | |
| 419 | TEST_F(AvbAtxValidateTest, BadPSKCert_ModifiedSubjectPublicKey) { |
| 420 | metadata_.product_signing_key_certificate.signed_data.public_key[0] ^= 1; |
| 421 | bool is_trusted = true; |
| 422 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 423 | EXPECT_FALSE(is_trusted); |
| 424 | } |
| 425 | |
| 426 | TEST_F(AvbAtxValidateTest, BadPSKCert_ModifiedSubject) { |
| 427 | metadata_.product_signing_key_certificate.signed_data.subject[0] ^= 1; |
| 428 | bool is_trusted = true; |
| 429 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 430 | EXPECT_FALSE(is_trusted); |
| 431 | } |
| 432 | |
| 433 | TEST_F(AvbAtxValidateTest, BadPSKCert_ModifiedUsage) { |
| 434 | metadata_.product_signing_key_certificate.signed_data.usage[0] ^= 1; |
| 435 | bool is_trusted = true; |
| 436 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 437 | EXPECT_FALSE(is_trusted); |
| 438 | } |
| 439 | |
| 440 | TEST_F(AvbAtxValidateTest, BadPSKCert_ModifiedKeyVersion) { |
| 441 | metadata_.product_signing_key_certificate.signed_data.key_version ^= 1; |
| 442 | bool is_trusted = true; |
| 443 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 444 | EXPECT_FALSE(is_trusted); |
| 445 | } |
| 446 | |
| 447 | TEST_F(AvbAtxValidateTest, BadPSKCert_BadSignature) { |
| 448 | metadata_.product_signing_key_certificate.signature[0] ^= 1; |
| 449 | bool is_trusted = true; |
| 450 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 451 | EXPECT_FALSE(is_trusted); |
| 452 | } |
| 453 | |
| 454 | TEST_F(AvbAtxValidateTest, PSKCertUnexpectedSubject) { |
| 455 | metadata_.product_signing_key_certificate.signed_data.subject[0] ^= 1; |
| 456 | SignPSKCertificate(); |
| 457 | bool is_trusted = true; |
| 458 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 459 | EXPECT_FALSE(is_trusted); |
| 460 | } |
| 461 | |
| 462 | TEST_F(AvbAtxValidateTest, PSKCertUnexpectedUsage) { |
| 463 | metadata_.product_signing_key_certificate.signed_data.usage[0] ^= 1; |
| 464 | SignPSKCertificate(); |
| 465 | bool is_trusted = true; |
| 466 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 467 | EXPECT_FALSE(is_trusted); |
| 468 | } |
| 469 | |
| 470 | TEST_F(AvbAtxValidateTest, PSKRollback) { |
| 471 | ops_.set_stored_rollback_indexes( |
| 472 | {{AVB_ATX_PIK_VERSION_LOCATION, 0}, |
| 473 | {AVB_ATX_PSK_VERSION_LOCATION, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 474 | metadata_.product_signing_key_certificate.signed_data.key_version + |
| 475 | 1}}); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 476 | bool is_trusted = true; |
| 477 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 478 | EXPECT_FALSE(is_trusted); |
| 479 | } |
| 480 | |
| 481 | // A fixture with parameterized public key length. |
| 482 | class AvbAtxValidateTestWithPublicKeyLength |
| 483 | : public AvbAtxValidateTest, |
| 484 | public ::testing::WithParamInterface<size_t> { |
| 485 | protected: |
| 486 | AvbIOResult Validate(bool* is_trusted) override { |
| 487 | return avb_atx_validate_vbmeta_public_key( |
| 488 | ops_.avb_ops(), |
| 489 | metadata_.product_signing_key_certificate.signed_data.public_key, |
| 490 | GetParam(), |
| 491 | reinterpret_cast<const uint8_t*>(&metadata_), |
| 492 | sizeof(metadata_), |
| 493 | is_trusted); |
| 494 | } |
| 495 | }; |
| 496 | |
| 497 | TEST_P(AvbAtxValidateTestWithPublicKeyLength, InvalidPublicKeyLength) { |
| 498 | bool is_trusted = true; |
| 499 | EXPECT_EQ(AVB_IO_RESULT_OK, Validate(&is_trusted)); |
| 500 | EXPECT_FALSE(is_trusted); |
| 501 | } |
| 502 | |
| 503 | // Test a bunch of invalid public key length values. |
| 504 | INSTANTIATE_TEST_CASE_P(P, |
| 505 | AvbAtxValidateTestWithPublicKeyLength, |
| 506 | ::testing::Values(0, |
| 507 | 1, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 508 | AVB_ATX_PUBLIC_KEY_SIZE - 1, |
| 509 | AVB_ATX_PUBLIC_KEY_SIZE + 1, |
| 510 | AVB_ATX_PUBLIC_KEY_SIZE - 512, |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 511 | -1)); |
| 512 | |
| 513 | TEST_F(AvbAtxValidateTest, PSKMismatch) { |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 514 | uint8_t bad_key[AVB_ATX_PUBLIC_KEY_SIZE] = {}; |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 515 | bool is_trusted = true; |
| 516 | EXPECT_EQ(AVB_IO_RESULT_OK, |
| 517 | avb_atx_validate_vbmeta_public_key( |
| 518 | ops_.avb_ops(), |
| 519 | bad_key, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 520 | AVB_ATX_PUBLIC_KEY_SIZE, |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 521 | reinterpret_cast<const uint8_t*>(&metadata_), |
| 522 | sizeof(metadata_), |
| 523 | &is_trusted)); |
| 524 | EXPECT_FALSE(is_trusted); |
| 525 | } |
| 526 | |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 527 | // A fixture for testing avb_slot_verify() with ATX. |
| 528 | class AvbAtxSlotVerifyTest : public BaseAvbToolTest, public FakeAvbOpsDelegate { |
| 529 | public: |
| 530 | ~AvbAtxSlotVerifyTest() override = default; |
| 531 | |
| 532 | void SetUp() override { |
| 533 | BaseAvbToolTest::SetUp(); |
| 534 | ReadAtxDefaultData(); |
| 535 | ops_.set_partition_dir(testdir_); |
| 536 | ops_.set_delegate(this); |
| 537 | ops_.set_permanent_attributes(attributes_); |
| 538 | ops_.set_stored_rollback_indexes({{0, 0}, |
| 539 | {1, 0}, |
| 540 | {2, 0}, |
| 541 | {3, 0}, |
| 542 | {AVB_ATX_PIK_VERSION_LOCATION, 0}, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 543 | {AVB_ATX_PSK_VERSION_LOCATION, 0}}); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 544 | ops_.set_stored_is_device_unlocked(false); |
| 545 | } |
| 546 | |
| 547 | // FakeAvbOpsDelegate methods. All forward to FakeAvbOps default except for |
| 548 | // validate_vbmeta_public_key(). |
| 549 | AvbIOResult read_from_partition(const char* partition, |
| 550 | int64_t offset, |
| 551 | size_t num_bytes, |
| 552 | void* buffer, |
| 553 | size_t* out_num_read) override { |
| 554 | return ops_.read_from_partition( |
| 555 | partition, offset, num_bytes, buffer, out_num_read); |
| 556 | } |
| 557 | |
| 558 | AvbIOResult write_to_partition(const char* partition, |
| 559 | int64_t offset, |
| 560 | size_t num_bytes, |
| 561 | const void* buffer) override { |
| 562 | return ops_.write_to_partition(partition, offset, num_bytes, buffer); |
| 563 | } |
| 564 | |
| 565 | AvbIOResult validate_vbmeta_public_key(AvbOps* ops, |
| 566 | const uint8_t* public_key_data, |
| 567 | size_t public_key_length, |
| 568 | const uint8_t* public_key_metadata, |
| 569 | size_t public_key_metadata_length, |
| 570 | bool* out_key_is_trusted) override { |
| 571 | // Send to ATX implementation. |
| 572 | ++num_atx_calls_; |
| 573 | return avb_atx_validate_vbmeta_public_key(ops_.avb_ops(), |
| 574 | public_key_data, |
| 575 | public_key_length, |
| 576 | public_key_metadata, |
| 577 | public_key_metadata_length, |
| 578 | out_key_is_trusted); |
| 579 | } |
| 580 | |
| 581 | AvbIOResult read_rollback_index(AvbOps* ops, |
| 582 | size_t rollback_index_slot, |
| 583 | uint64_t* out_rollback_index) override { |
| 584 | return ops_.read_rollback_index( |
| 585 | ops, rollback_index_slot, out_rollback_index); |
| 586 | } |
| 587 | |
| 588 | AvbIOResult write_rollback_index(AvbOps* ops, |
| 589 | size_t rollback_index_slot, |
| 590 | uint64_t rollback_index) override { |
| 591 | return ops_.write_rollback_index(ops, rollback_index_slot, rollback_index); |
| 592 | } |
| 593 | |
| 594 | AvbIOResult read_is_device_unlocked(AvbOps* ops, |
| 595 | bool* out_is_device_unlocked) override { |
| 596 | return ops_.read_is_device_unlocked(ops, out_is_device_unlocked); |
| 597 | } |
| 598 | |
| 599 | AvbIOResult get_unique_guid_for_partition(AvbOps* ops, |
| 600 | const char* partition, |
| 601 | char* guid_buf, |
| 602 | size_t guid_buf_size) override { |
| 603 | return ops_.get_unique_guid_for_partition( |
| 604 | ops, partition, guid_buf, guid_buf_size); |
| 605 | } |
| 606 | |
| 607 | AvbIOResult read_permanent_attributes( |
| 608 | AvbAtxPermanentAttributes* attributes) override { |
| 609 | return ops_.read_permanent_attributes(attributes); |
| 610 | } |
| 611 | |
| 612 | AvbIOResult read_permanent_attributes_hash( |
| 613 | uint8_t hash[AVB_SHA256_DIGEST_SIZE]) override { |
| 614 | return ops_.read_permanent_attributes_hash(hash); |
| 615 | } |
| 616 | |
| 617 | protected: |
| 618 | FakeAvbOps ops_; |
| 619 | AvbAtxPermanentAttributes attributes_; |
| 620 | int num_atx_calls_ = 0; |
| 621 | |
| 622 | private: |
| 623 | void ReadAtxDefaultData() { |
| 624 | std::string tmp; |
| 625 | ASSERT_TRUE( |
| 626 | base::ReadFileToString(base::FilePath(kPermanentAttributesPath), &tmp)); |
| 627 | ASSERT_EQ(tmp.size(), sizeof(AvbAtxPermanentAttributes)); |
| 628 | memcpy(&attributes_, tmp.data(), tmp.size()); |
| 629 | } |
| 630 | }; |
| 631 | |
| 632 | TEST_F(AvbAtxSlotVerifyTest, SlotVerifyWithAtx) { |
| 633 | std::string metadata_option = "--public_key_metadata="; |
| 634 | metadata_option += kMetadataPath; |
| 635 | GenerateVBMetaImage("vbmeta_a.img", |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 636 | "SHA512_RSA4096", |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 637 | 0, |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 638 | base::FilePath("test/data/testkey_atx_psk.pem"), |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 639 | metadata_option); |
| 640 | |
| 641 | ops_.set_expected_public_key( |
Darren Krahn | 43e12d8 | 2017-02-24 16:26:31 -0800 | [diff] [blame] | 642 | PublicKeyAVB(base::FilePath("test/data/testkey_atx_psk.pem"))); |
Darren Krahn | 147b08d | 2016-12-20 16:38:29 -0800 | [diff] [blame] | 643 | |
| 644 | AvbSlotVerifyData* slot_data = NULL; |
| 645 | const char* requested_partitions[] = {"boot", NULL}; |
| 646 | EXPECT_EQ(AVB_SLOT_VERIFY_RESULT_OK, |
| 647 | avb_slot_verify(ops_.avb_ops(), |
| 648 | requested_partitions, |
| 649 | "_a", |
| 650 | false /* allow_verification_error */, |
| 651 | &slot_data)); |
| 652 | EXPECT_NE(nullptr, slot_data); |
| 653 | avb_slot_verify_data_free(slot_data); |
| 654 | EXPECT_EQ(1, num_atx_calls_); |
| 655 | } |
| 656 | |
| 657 | } // namespace avb |