1 /* 2 * Copyright 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SYSTEM_KEYMASTER_ANDROID_KEYMASTER_TEST_UTILS_H_ 18 #define SYSTEM_KEYMASTER_ANDROID_KEYMASTER_TEST_UTILS_H_ 19 20 /* 21 * Utilities used to help with testing. Not used in production code. 22 */ 23 24 #include <stdarg.h> 25 26 #include <algorithm> 27 #include <memory> 28 #include <ostream> 29 #include <string> 30 #include <vector> 31 32 #include <gtest/gtest.h> 33 34 #include <hardware/keymaster0.h> 35 #include <hardware/keymaster1.h> 36 #include <hardware/keymaster2.h> 37 #include <hardware/keymaster_defs.h> 38 39 #include <keymaster/android_keymaster_utils.h> 40 #include <keymaster/authorization_set.h> 41 #include <keymaster/keymaster_context.h> 42 #include <keymaster/logger.h> 43 44 std::ostream& operator<<(std::ostream& os, const keymaster_key_param_t& param); 45 bool operator==(const keymaster_key_param_t& a, const keymaster_key_param_t& b); 46 std::string hex2str(std::string); 47 48 namespace keymaster { 49 50 bool operator==(const AuthorizationSet& a, const AuthorizationSet& b); 51 bool operator!=(const AuthorizationSet& a, const AuthorizationSet& b); 52 53 std::ostream& operator<<(std::ostream& os, const AuthorizationSet& set); 54 55 namespace test { 56 57 template <keymaster_tag_t Tag, typename KeymasterEnum> 58 bool contains(const AuthorizationSet& set, TypedEnumTag<KM_ENUM, Tag, KeymasterEnum> tag, 59 KeymasterEnum val) { 60 int pos = set.find(tag); 61 return pos != -1 && set[pos].enumerated == val; 62 } 63 64 template <keymaster_tag_t Tag, typename KeymasterEnum> 65 bool contains(const AuthorizationSet& set, TypedEnumTag<KM_ENUM_REP, Tag, KeymasterEnum> tag, 66 KeymasterEnum val) { 67 int pos = -1; 68 while ((pos = set.find(tag, pos)) != -1) 69 if (set[pos].enumerated == val) 70 return true; 71 return false; 72 } 73 74 template <keymaster_tag_t Tag> 75 bool contains(const AuthorizationSet& set, TypedTag<KM_UINT, Tag> tag, uint32_t val) { 76 int pos = set.find(tag); 77 return pos != -1 && set[pos].integer == val; 78 } 79 80 template <keymaster_tag_t Tag> 81 bool contains(const AuthorizationSet& set, TypedTag<KM_UINT_REP, Tag> tag, uint32_t val) { 82 int pos = -1; 83 while ((pos = set.find(tag, pos)) != -1) 84 if (set[pos].integer == val) 85 return true; 86 return false; 87 } 88 89 template <keymaster_tag_t Tag> 90 bool contains(const AuthorizationSet& set, TypedTag<KM_ULONG, Tag> tag, uint64_t val) { 91 int pos = set.find(tag); 92 return pos != -1 && set[pos].long_integer == val; 93 } 94 95 template <keymaster_tag_t Tag> 96 bool contains(const AuthorizationSet& set, TypedTag<KM_BYTES, Tag> tag, const std::string& val) { 97 int pos = set.find(tag); 98 return pos != -1 && 99 std::string(reinterpret_cast<const char*>(set[pos].blob.data), 100 set[pos].blob.data_length) == val; 101 } 102 103 template <keymaster_tag_t Tag> 104 bool contains(const AuthorizationSet& set, TypedTag<KM_BIGNUM, Tag> tag, const std::string& val) { 105 int pos = set.find(tag); 106 return pos != -1 && 107 std::string(reinterpret_cast<const char*>(set[pos].blob.data), 108 set[pos].blob.data_length) == val; 109 } 110 111 inline bool contains(const AuthorizationSet& set, keymaster_tag_t tag) { 112 return set.find(tag) != -1; 113 } 114 115 class StdoutLogger : public Logger { 116 public: 117 StdoutLogger() { set_instance(this); } 118 119 int log_msg(LogLevel level, const char* fmt, va_list args) const { 120 int output_len = 0; 121 switch (level) { 122 case DEBUG_LVL: 123 output_len = printf("DEBUG: "); 124 break; 125 case INFO_LVL: 126 output_len = printf("INFO: "); 127 break; 128 case WARNING_LVL: 129 output_len = printf("WARNING: "); 130 break; 131 case ERROR_LVL: 132 output_len = printf("ERROR: "); 133 break; 134 case SEVERE_LVL: 135 output_len = printf("SEVERE: "); 136 break; 137 } 138 139 output_len += vprintf(fmt, args); 140 output_len += printf("\n"); 141 return output_len; 142 } 143 }; 144 145 inline std::string make_string(const uint8_t* data, size_t length) { 146 return std::string(reinterpret_cast<const char*>(data), length); 147 } 148 149 template <size_t N> std::string make_string(const uint8_t (&a)[N]) { 150 return make_string(a, N); 151 } 152 153 /** 154 * Keymaster2TestInstance is used to parameterize Keymaster2Tests. Its main function is to create a 155 * keymaster2_device_t to which test calls can be directed. It also provides a place to specify 156 * various bits of alternative behavior, in cases where different devices are expected to behave 157 * differently (any such cases are a potential bug, but sometimes they may make sense). 158 */ 159 class Keymaster2TestInstanceCreator { 160 public: 161 virtual ~Keymaster2TestInstanceCreator(){}; 162 virtual keymaster2_device_t* CreateDevice() const = 0; 163 164 virtual bool algorithm_in_km0_hardware(keymaster_algorithm_t algorithm) const = 0; 165 virtual int keymaster0_calls() const = 0; 166 virtual int minimal_digest_set() const { return false; } 167 virtual bool is_keymaster1_hw() const = 0; 168 virtual KeymasterContext* keymaster_context() const = 0; 169 }; 170 171 // Use a shared_ptr because it's copyable. 172 typedef std::shared_ptr<Keymaster2TestInstanceCreator> InstanceCreatorPtr; 173 174 const uint64_t OP_HANDLE_SENTINEL = 0xFFFFFFFFFFFFFFFF; 175 class Keymaster2Test : public testing::TestWithParam<InstanceCreatorPtr> { 176 protected: 177 Keymaster2Test(); 178 ~Keymaster2Test(); 179 180 keymaster2_device_t* device(); 181 182 keymaster_error_t GenerateKey(const AuthorizationSetBuilder& builder); 183 184 keymaster_error_t DeleteKey(); 185 186 keymaster_error_t ImportKey(const AuthorizationSetBuilder& builder, 187 keymaster_key_format_t format, const std::string& key_material); 188 189 keymaster_error_t ExportKey(keymaster_key_format_t format, std::string* export_data); 190 191 keymaster_error_t GetCharacteristics(); 192 193 keymaster_error_t BeginOperation(keymaster_purpose_t purpose); 194 keymaster_error_t BeginOperation(keymaster_purpose_t purpose, const AuthorizationSet& input_set, 195 AuthorizationSet* output_set = NULL); 196 197 keymaster_error_t UpdateOperation(const std::string& message, std::string* output, 198 size_t* input_consumed); 199 keymaster_error_t UpdateOperation(const AuthorizationSet& additional_params, 200 const std::string& message, AuthorizationSet* output_params, 201 std::string* output, size_t* input_consumed); 202 203 keymaster_error_t FinishOperation(std::string* output); 204 keymaster_error_t FinishOperation(const std::string& signature, std::string* output); 205 keymaster_error_t FinishOperation(const AuthorizationSet& additional_params, 206 const std::string& signature, std::string* output) { 207 return FinishOperation(additional_params, signature, nullptr /* output_params */, output); 208 } 209 keymaster_error_t FinishOperation(const AuthorizationSet& additional_params, 210 const std::string& signature, AuthorizationSet* output_params, 211 std::string* output); 212 213 keymaster_error_t AbortOperation(); 214 215 keymaster_error_t AttestKey(const std::string& attest_challenge, keymaster_cert_chain_t* chain); 216 217 keymaster_error_t UpgradeKey(const AuthorizationSet& upgrade_params); 218 219 keymaster_error_t GetVersion(uint8_t* major, uint8_t* minor, uint8_t* subminor); 220 221 std::string ProcessMessage(keymaster_purpose_t purpose, const std::string& message); 222 std::string ProcessMessage(keymaster_purpose_t purpose, const std::string& message, 223 const AuthorizationSet& begin_params, 224 const AuthorizationSet& update_params, 225 AuthorizationSet* output_params = NULL); 226 std::string ProcessMessage(keymaster_purpose_t purpose, const std::string& message, 227 const std::string& signature, const AuthorizationSet& begin_params, 228 const AuthorizationSet& update_params, 229 AuthorizationSet* output_params = NULL); 230 std::string ProcessMessage(keymaster_purpose_t purpose, const std::string& message, 231 const std::string& signature); 232 233 void SignMessage(const std::string& message, std::string* signature, keymaster_digest_t digest); 234 void SignMessage(const std::string& message, std::string* signature, keymaster_digest_t digest, 235 keymaster_padding_t padding); 236 void MacMessage(const std::string& message, std::string* signature, size_t mac_length); 237 238 void VerifyMessage(const std::string& message, const std::string& signature, 239 keymaster_digest_t digest); 240 void VerifyMessage(const std::string& message, const std::string& signature, 241 keymaster_digest_t digest, keymaster_padding_t padding); 242 void VerifyMac(const std::string& message, const std::string& signature); 243 244 std::string EncryptMessage(const std::string& message, keymaster_padding_t padding, 245 std::string* generated_nonce = NULL); 246 std::string EncryptMessage(const std::string& message, keymaster_digest_t digest, 247 keymaster_padding_t padding, std::string* generated_nonce = NULL); 248 std::string EncryptMessage(const std::string& message, keymaster_block_mode_t block_mode, 249 keymaster_padding_t padding, std::string* generated_nonce = NULL); 250 std::string EncryptMessage(const AuthorizationSet& update_params, const std::string& message, 251 keymaster_digest_t digest, keymaster_padding_t padding, 252 std::string* generated_nonce = NULL); 253 std::string EncryptMessage(const AuthorizationSet& update_params, const std::string& message, 254 keymaster_block_mode_t block_mode, keymaster_padding_t padding, 255 std::string* generated_nonce = NULL); 256 std::string EncryptMessageWithParams(const std::string& message, 257 const AuthorizationSet& begin_params, 258 const AuthorizationSet& update_params, 259 AuthorizationSet* output_params); 260 261 std::string DecryptMessage(const std::string& ciphertext, keymaster_padding_t padding); 262 std::string DecryptMessage(const std::string& ciphertext, keymaster_digest_t digest, 263 keymaster_padding_t padding); 264 std::string DecryptMessage(const std::string& ciphertext, keymaster_block_mode_t block_mode, 265 keymaster_padding_t padding); 266 std::string DecryptMessage(const std::string& ciphertext, keymaster_digest_t digest, 267 keymaster_padding_t padding, const std::string& nonce); 268 std::string DecryptMessage(const std::string& ciphertext, keymaster_block_mode_t block_mode, 269 keymaster_padding_t padding, const std::string& nonce); 270 std::string DecryptMessage(const AuthorizationSet& update_params, const std::string& ciphertext, 271 keymaster_digest_t digest, keymaster_padding_t padding, 272 const std::string& nonce); 273 std::string DecryptMessage(const AuthorizationSet& update_params, const std::string& ciphertext, 274 keymaster_block_mode_t block_mode, keymaster_padding_t padding, 275 const std::string& nonce); 276 277 void CheckHmacTestVector(std::string key, std::string message, keymaster_digest_t digest, 278 std::string expected_mac); 279 void CheckAesOcbTestVector(const std::string& key, const std::string& nonce, 280 const std::string& associated_data, const std::string& message, 281 const std::string& expected_ciphertext); 282 void CheckAesCtrTestVector(const std::string& key, const std::string& nonce, 283 const std::string& message, const std::string& expected_ciphertext); 284 AuthorizationSet UserAuthParams(); 285 AuthorizationSet ClientParams(); 286 287 template <typename T> 288 bool ResponseContains(const std::vector<T>& expected, const T* values, size_t len) { 289 return expected.size() == len && 290 std::is_permutation(values, values + len, expected.begin()); 291 } 292 293 template <typename T> bool ResponseContains(T expected, const T* values, size_t len) { 294 return (len == 1 && *values == expected); 295 } 296 297 AuthorizationSet hw_enforced(); 298 AuthorizationSet sw_enforced(); 299 300 void FreeCharacteristics(); 301 void FreeKeyBlob(); 302 303 void corrupt_key_blob(); 304 305 void set_key_blob(const uint8_t* key, size_t key_length) { 306 FreeKeyBlob(); 307 blob_.key_material = key; 308 blob_.key_material_size = key_length; 309 } 310 311 AuthorizationSet client_params() { 312 return AuthorizationSet(client_params_, sizeof(client_params_) / sizeof(client_params_[0])); 313 } 314 315 private: 316 keymaster2_device_t* device_; 317 keymaster_blob_t client_id_ = {.data = reinterpret_cast<const uint8_t*>("app_id"), 318 .data_length = 6}; 319 keymaster_key_param_t client_params_[1] = { 320 Authorization(TAG_APPLICATION_ID, client_id_.data, client_id_.data_length)}; 321 322 uint64_t op_handle_; 323 324 keymaster_key_blob_t blob_; 325 keymaster_key_characteristics_t characteristics_; 326 }; 327 328 struct Keymaster0CountingWrapper : public keymaster0_device_t { 329 Keymaster0CountingWrapper(keymaster0_device_t* device) : device_(device), counter_(0) { 330 common = device_->common; 331 common.close = counting_close_device; 332 client_version = device_->client_version; 333 flags = device_->flags; 334 context = this; 335 336 generate_keypair = counting_generate_keypair; 337 import_keypair = counting_import_keypair; 338 get_keypair_public = counting_get_keypair_public; 339 delete_keypair = counting_delete_keypair; 340 delete_all = counting_delete_all; 341 sign_data = counting_sign_data; 342 verify_data = counting_verify_data; 343 } 344 345 int count() { return counter_; } 346 347 // The blobs generated by the underlying softkeymaster start with "PK#8". Tweak the prefix so 348 // they don't get identified as softkeymaster blobs. 349 static void munge_blob(uint8_t* blob, size_t blob_length) { 350 if (blob && blob_length > 0 && *blob == 'P') 351 *blob = 'Q'; // Mind your Ps and Qs! 352 } 353 354 // Copy and un-modfy the blob. The caller must clean up the return value. 355 static uint8_t* unmunge_blob(const uint8_t* blob, size_t blob_length) { 356 uint8_t* dup_blob = dup_buffer(blob, blob_length); 357 if (dup_blob && blob_length > 0 && *dup_blob == 'Q') 358 *dup_blob = 'P'; 359 return dup_blob; 360 } 361 362 static keymaster0_device_t* device(const keymaster0_device_t* dev) { 363 Keymaster0CountingWrapper* wrapper = 364 reinterpret_cast<Keymaster0CountingWrapper*>(dev->context); 365 return wrapper->device_; 366 } 367 368 static void increment(const keymaster0_device_t* dev) { 369 Keymaster0CountingWrapper* wrapper = 370 reinterpret_cast<Keymaster0CountingWrapper*>(dev->context); 371 wrapper->counter_++; 372 } 373 374 static int counting_close_device(hw_device_t* dev) { 375 keymaster0_device_t* k0_dev = reinterpret_cast<keymaster0_device_t*>(dev); 376 increment(k0_dev); 377 Keymaster0CountingWrapper* wrapper = 378 reinterpret_cast<Keymaster0CountingWrapper*>(k0_dev->context); 379 int retval = 380 wrapper->device_->common.close(reinterpret_cast<hw_device_t*>(wrapper->device_)); 381 delete wrapper; 382 return retval; 383 } 384 385 static int counting_generate_keypair(const struct keymaster0_device* dev, 386 const keymaster_keypair_t key_type, const void* key_params, 387 uint8_t** key_blob, size_t* key_blob_length) { 388 increment(dev); 389 int result = device(dev)->generate_keypair(device(dev), key_type, key_params, key_blob, 390 key_blob_length); 391 if (result == 0) 392 munge_blob(*key_blob, *key_blob_length); 393 return result; 394 } 395 396 static int counting_import_keypair(const struct keymaster0_device* dev, const uint8_t* key, 397 const size_t key_length, uint8_t** key_blob, 398 size_t* key_blob_length) { 399 increment(dev); 400 int result = 401 device(dev)->import_keypair(device(dev), key, key_length, key_blob, key_blob_length); 402 if (result == 0) 403 munge_blob(*key_blob, *key_blob_length); 404 return result; 405 } 406 407 static int counting_get_keypair_public(const struct keymaster0_device* dev, 408 const uint8_t* key_blob, const size_t key_blob_length, 409 uint8_t** x509_data, size_t* x509_data_length) { 410 increment(dev); 411 std::unique_ptr<uint8_t[]> dup_blob(unmunge_blob(key_blob, key_blob_length)); 412 return device(dev)->get_keypair_public(device(dev), dup_blob.get(), key_blob_length, 413 x509_data, x509_data_length); 414 } 415 416 static int counting_delete_keypair(const struct keymaster0_device* dev, const uint8_t* key_blob, 417 const size_t key_blob_length) { 418 increment(dev); 419 if (key_blob && key_blob_length > 0) 420 EXPECT_EQ('Q', *key_blob); 421 if (device(dev)->delete_keypair) { 422 std::unique_ptr<uint8_t[]> dup_blob(unmunge_blob(key_blob, key_blob_length)); 423 return device(dev)->delete_keypair(device(dev), dup_blob.get(), key_blob_length); 424 } 425 return 0; 426 } 427 428 static int counting_delete_all(const struct keymaster0_device* dev) { 429 increment(dev); 430 if (device(dev)->delete_all) 431 return device(dev)->delete_all(device(dev)); 432 return 0; 433 } 434 435 static int counting_sign_data(const struct keymaster0_device* dev, const void* signing_params, 436 const uint8_t* key_blob, const size_t key_blob_length, 437 const uint8_t* data, const size_t data_length, 438 uint8_t** signed_data, size_t* signed_data_length) { 439 increment(dev); 440 std::unique_ptr<uint8_t[]> dup_blob(unmunge_blob(key_blob, key_blob_length)); 441 return device(dev)->sign_data(device(dev), signing_params, dup_blob.get(), key_blob_length, 442 data, data_length, signed_data, signed_data_length); 443 } 444 445 static int counting_verify_data(const struct keymaster0_device* dev, const void* signing_params, 446 const uint8_t* key_blob, const size_t key_blob_length, 447 const uint8_t* signed_data, const size_t signed_data_length, 448 const uint8_t* signature, const size_t signature_length) { 449 increment(dev); 450 std::unique_ptr<uint8_t[]> dup_blob(unmunge_blob(key_blob, key_blob_length)); 451 return device(dev)->verify_data(device(dev), signing_params, dup_blob.get(), 452 key_blob_length, signed_data, signed_data_length, signature, 453 signature_length); 454 } 455 456 private: 457 keymaster0_device_t* device_; 458 int counter_; 459 }; 460 461 /** 462 * This function takes a keymaster1_device_t and wraps it in an adapter that supports only 463 * KM_DIGEST_SHA_2_256. 464 */ 465 keymaster1_device_t* make_device_sha256_only(keymaster1_device_t* device); 466 467 } // namespace test 468 } // namespace keymaster 469 470 #endif // SYSTEM_KEYMASTER_ANDROID_KEYMASTER_TEST_UTILS_H_ 471
