src/manager/crypto/tz-backend/tz-context.cpp

   1 /*
   2  *  Copyright (c) 2017-2021 Samsung Electronics Co., Ltd. All rights reserved
   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  * @file       tz-context.cpp
  18  * @author     Lukasz Kostyra (l.kostyra@samsung.com)
  19  * @version    1.0
  20  */
  21
  22 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  23
  24 #include <tz-backend/tz-context.h>
  25 #include <tz-backend/tz-memory.h>
  26 #include <generic-backend/exception.h>
  27 #include <generic-backend/crypto-params.h>
  28 #include <generic-backend/encryption-params.h>
  29 #include <dpl/log/log.h>
  30
  31 #include <km_serialization.h>
  32 #include <km_ta_defines.h>
  33
  34 #include <cstdint>
  35 #include <cstring>
  36 #include <cassert>
  37 #include <unordered_map>
  38
  39 namespace CKM {
  40 namespace Crypto {
  41 namespace TZ {
  42 namespace Internals {
  43
  44 namespace {
  45
  46 // A little bit of extra memory to add to output buffers.
  47 //
  48 // We need this extra memory to output for padding purposes - after encryption
  49 // we can resize the result memory back to its proper size according to
  50 // whatever TA will return us.
  51 const uint32_t CIPHER_EXTRA_PADDING_SIZE = 16;
  52
  53 // Identifier of our TA
  54 const TEEC_UUID KEY_MANAGER_TA_UUID = KM_TA_UUID;
  55
  56 //raw to hex string conversion to print persistent storage data ID
  57 static std::string rawToHexString(const RawBuffer &raw)
  58 {
  59         return hexDump<std::string>(raw);
  60 }
  61
  62 /*
  63  * Maximum size for given key type in bytes according to key-manager-ta implementation.
  64  * Note that they are greater than TEE Internal Core API v1.1.2.50 (Table 5-9) values.
  65  */
  66 const std::unordered_map<tz_algo_type, size_t> MAX_KEY_SIZE = {
  67         { ALGO_RSA, 4096 / 8 },
  68         { ALGO_RSA_SV, 4096 / 8 },
  69         { ALGO_DSA_SV, 4096 / 8 }
  70 };
  71
  72 struct EncPwd {
  73         const RawBuffer &password;
  74         const RawBuffer &iv;
  75 };
  76
  77 template <typename T>
  78 void push(TZSerializer& ser, const T& value)
  79 {
  80         ser.Push(new TZSerializableFlag(static_cast<uint32_t>(value)));
  81 }
  82
  83 template<>
  84 void push<RawBuffer>(TZSerializer& ser, const RawBuffer& value)
  85 {
  86         ser.Push(new TZSerializableBinary(value));
  87 }
  88
  89 template<>
  90 void push<Pwd>(TZSerializer& ser, const Pwd& value)
  91 {
  92         int32_t pwd_flag = value.getPassword().empty() ? 0 : 1;
  93         ser.Push(new TZSerializableFlag(pwd_flag));
  94         if (pwd_flag)
  95                 ser.Push(new TZSerializablePwdData(value.getPassword(),
  96                                                                                    value.getIV(),
  97                                                                                    value.getTag().size() * 8,
  98                                                                                    value.getTag()));
  99 }
 100
 101 template<>
 102 void push<EncPwd>(TZSerializer& ser, const EncPwd& value)
 103 {
 104         int32_t pwd_flag = value.password.empty() ? 0 : 1;
 105         ser.Push(new TZSerializableFlag(pwd_flag));
 106         if (pwd_flag)
 107                 ser.Push(new TZSerializablePwdData(value.password,
 108                                                                                    value.iv,
 109                                                                                    Params::DEFAULT_AES_GCM_TAG_LEN_BITS));
 110 }
 111
 112 template <typename T, typename ...Args>
 113 void push(TZSerializer& ser, const T& first, const Args&... args)
 114 {
 115         push<T>(ser, first);
 116         push<Args...>(ser, args...);
 117 }
 118
 119 template <typename ...Args>
 120 TZSerializer makeSerializer(const Args&... args)
 121 {
 122         TZSerializer ser;
 123         push<Args...>(ser, args...);
 124         return ser;
 125 }
 126
 127 } // anonymous namespace
 128
 129 TrustZoneContext::TrustZoneContext()
 130         : m_ContextInitialized(false)
 131         , m_SessionInitialized(false)
 132 {
 133         Initialize();
 134 }
 135
 136 TrustZoneContext::~TrustZoneContext()
 137 {
 138         Destroy();
 139 }
 140
 141 TrustZoneContext& TrustZoneContext::Instance()
 142 {
 143         static TrustZoneContext instance;
 144         return instance;
 145 }
 146
 147 TEEC_Operation makeOp(uint32_t value, TrustZoneMemory& mem1)
 148 {
 149         TEEC_Operation op;
 150
 151         op.paramTypes = TEEC_PARAM_TYPES(value, TEEC_MEMREF_WHOLE, TEEC_NONE, TEEC_NONE);
 152
 153         op.params[1].memref.parent = mem1.Get();
 154         op.params[1].memref.offset = 0;
 155         op.params[1].memref.size = mem1.Get()->size;
 156         return op;
 157 }
 158
 159 TEEC_Operation makeOp(uint32_t value, TrustZoneMemory& mem1, TrustZoneMemory& mem2)
 160 {
 161         TEEC_Operation op = makeOp(value, mem1);
 162
 163         op.paramTypes = TEEC_PARAM_TYPES(value, TEEC_MEMREF_WHOLE, TEEC_MEMREF_WHOLE, TEEC_NONE);
 164
 165         op.params[2].memref.parent = mem2.Get();
 166         op.params[2].memref.offset = 0;
 167         op.params[2].memref.size = mem2.Get()->size;
 168
 169         return op;
 170 }
 171
 172 void TrustZoneContext::generateIV(RawBuffer& iv)
 173 {
 174         // command ID = CMD_GENERATE_IV
 175         // IV generation is a simple call - no need to serialize data
 176         // just provide the output buffer with size equal to iv.
 177         uint32_t ivSize = Params::DEFAULT_AES_IV_LEN;
 178         TrustZoneMemory ivMemory(m_Context, ivSize, TEEC_MEM_OUTPUT);
 179
 180         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, ivMemory);
 181
 182         Execute(CMD_GENERATE_IV, &op);
 183
 184         iv.resize(ivSize);
 185         memcpy(iv.data(), ivMemory.Get()->buffer, ivMemory.Get()->size);
 186 }
 187
 188 void TrustZoneContext::generateSKey(tz_algo_type algo,
 189                                                                         uint32_t keySizeBits,
 190                                                                         const RawBuffer &hash)
 191 {
 192         // command ID = CMD_GENERATE_KEY
 193         auto sIn = makeSerializer(hash);
 194         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 195         sIn.Serialize(inMemory);
 196
 197         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory);
 198         op.params[0].value.a = algo;
 199         op.params[0].value.b = keySizeBits;
 200
 201         Execute(CMD_GENERATE_KEY, &op);
 202 }
 203
 204 void TrustZoneContext::generateSKeyPwd(tz_algo_type algo,
 205                                                                         const RawBuffer &pwd,
 206                                                                         const RawBuffer &iv,
 207                                                                         const uint32_t keySizeBits,
 208                                                                         RawBuffer &pwdTag,
 209                                                                         const RawBuffer &hash)
 210 {
 211         // command ID = CMD_GENERATE_KEY_PWD
 212         TZSerializer sIn;
 213         sIn.Push(new TZSerializablePwdData(pwd, iv, Params::DEFAULT_AES_GCM_TAG_LEN_BITS));
 214         sIn.Push(new TZSerializableBinary(hash));
 215         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 216         sIn.Serialize(inMemory);
 217
 218         TZSerializer sOut;
 219         sOut.Push(new TZSerializableBinary(Params::DEFAULT_AES_GCM_TAG_LEN_BYTES));
 220         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 221
 222         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 223         op.params[0].value.a = algo;
 224         op.params[0].value.b = keySizeBits;
 225
 226         Execute(CMD_GENERATE_KEY_PWD, &op);
 227
 228         sOut.Deserialize(outMemory);
 229         sOut.Pull(pwdTag);
 230
 231         if (pwdTag.size() != Params::DEFAULT_AES_GCM_TAG_LEN_BYTES) {
 232                 ThrowErr(Exc::Crypto::InternalError, "Deserialized incorrect key tag");
 233         }
 234 }
 235
 236 void TrustZoneContext::GenerateAKey(tz_command commandId,
 237                                     TZSerializer &sIn,
 238                                     uint32_t keySizeBits,
 239                                     const RawBuffer &pubPwd,
 240                                     const RawBuffer &pubPwdIv,
 241                                     const RawBuffer &privPwd,
 242                                     const RawBuffer &privPwdIv,
 243                                     RawBuffer &pubKeyTag,
 244                                     RawBuffer &privKeyTag,
 245                                     const RawBuffer &hashPriv,
 246                                                                         const RawBuffer &hashPub)
 247 {
 248         uint32_t pubTagSize = 0;
 249         uint32_t privTagSize = 0;
 250         uint32_t pubPwdExists = pubPwd.empty() ? 0 : 1;
 251         if (pubPwdExists) {
 252                 pubTagSize = Params::DEFAULT_AES_GCM_TAG_LEN_BYTES;
 253         }
 254         uint32_t privPwdExists = privPwd.empty() ? 0 : 1;
 255         if (privPwdExists) {
 256                 privTagSize = Params::DEFAULT_AES_GCM_TAG_LEN_BYTES;
 257         }
 258
 259         push(sIn, EncPwd{pubPwd, pubPwdIv}, EncPwd{privPwd, privPwdIv}, hashPriv, hashPub);
 260         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 261         sIn.Serialize(inMemory);
 262
 263         TZSerializer sOut;
 264         sOut.Push(new TZSerializableBinary(pubTagSize));
 265         sOut.Push(new TZSerializableBinary(privTagSize));
 266
 267         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 268
 269         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 270         op.params[0].value.b = keySizeBits;
 271
 272         Execute(commandId, &op);
 273
 274         sOut.Deserialize(outMemory);
 275         if (pubPwdExists) {
 276                 sOut.Pull(pubKeyTag);
 277         }
 278
 279         if (privPwdExists) {
 280                 sOut.Pull(privKeyTag);
 281         }
 282 }
 283
 284 void TrustZoneContext::generateRSAKey(uint32_t keySizeBits,
 285                                                                         const RawBuffer &pubPwd,
 286                                                                         const RawBuffer &pubPwdIv,
 287                                                                         const RawBuffer &privPwd,
 288                                                                         const RawBuffer &privPwdIv,
 289                                                                         RawBuffer &pubKeyTag,
 290                                                                         RawBuffer &privKeyTag,
 291                                                                         const RawBuffer &hashPriv,
 292                                                                         const RawBuffer &hashPub)
 293 {
 294         // command ID = CMD_GENERATE_RSA_KEYPAIR
 295         TZSerializer sIn;
 296
 297         GenerateAKey(CMD_GENERATE_RSA_KEYPAIR,
 298                      sIn,
 299                      keySizeBits,
 300                      pubPwd,
 301                      pubPwdIv,
 302                      privPwd,
 303                      privPwdIv,
 304                      pubKeyTag,
 305                      privKeyTag,
 306                      hashPriv,
 307                      hashPub);
 308 }
 309
 310 void TrustZoneContext::generateDSAKey(uint32_t keySizeBits,
 311                                                                         const RawBuffer &prime,
 312                                                                         const RawBuffer &subprime,
 313                                                                         const RawBuffer &base,
 314                                                                         const RawBuffer &pubPwd,
 315                                                                         const RawBuffer &pubPwdIv,
 316                                                                         const RawBuffer &privPwd,
 317                                                                         const RawBuffer &privPwdIv,
 318                                                                         RawBuffer &pubKeyTag,
 319                                                                         RawBuffer &privKeyTag,
 320                                                                         const RawBuffer &hashPriv,
 321                                                                         const RawBuffer &hashPub)
 322 {
 323         // command ID = CMD_GENERATE_DSA_KEYPAIR
 324         auto sIn = makeSerializer(prime, subprime, base);
 325
 326         GenerateAKey(CMD_GENERATE_DSA_KEYPAIR,
 327                      sIn,
 328                      keySizeBits,
 329                      pubPwd,
 330                      pubPwdIv,
 331                      privPwd,
 332                      privPwdIv,
 333                      pubKeyTag,
 334                      privKeyTag,
 335                      hashPriv,
 336                      hashPub);
 337 }
 338
 339 void TrustZoneContext::executeCrypt(tz_command cmd,
 340                                                                         tz_algo_type algo,
 341                                                                         const RawBuffer &keyId,
 342                                                                         const Pwd &pwd,
 343                                                                         const RawBuffer &iv,
 344                                                                         const RawBuffer &data,
 345                                                                         RawBuffer &out)
 346 {
 347         // command IDs = CMD_ENCRYPT, CMD_DECRYPT (from km_ta_defines.h)
 348         if (keyId.size() != KM_KEY_ID_SIZE) {
 349                 ThrowErr(Exc::Crypto::InternalError, "TZ Backend received incorrect key buffer (size = "
 350                         + std::to_string(keyId.size()) + ")");
 351         }
 352
 353         TZSerializer sIn;
 354         if (algo == ALGO_RSA)
 355                 sIn = makeSerializer(data, pwd, keyId);
 356         else
 357                 sIn = makeSerializer(data, pwd, iv, keyId);
 358
 359         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 360         sIn.Serialize(inMemory);
 361
 362         // decrypt operation does not require padding
 363         uint32_t outMemorySize = data.size();
 364         if (cmd == CMD_ENCRYPT) {
 365                 if (algo == ALGO_RSA) {
 366                         // We don't know the key length
 367                         outMemorySize = MAX_KEY_SIZE.at(ALGO_RSA);
 368                 } else {
 369                         outMemorySize = static_cast<uint32_t>(data.size() + CIPHER_EXTRA_PADDING_SIZE);
 370                 }
 371         }
 372
 373         TZSerializer sOut;
 374         sOut.Push(new TZSerializableBinary(outMemorySize, false));
 375         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 376
 377         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 378         op.params[0].value.a = algo;
 379
 380         Execute(cmd, &op);
 381
 382         sOut.Deserialize(outMemory);
 383         sOut.Pull(out);
 384 }
 385
 386 void TrustZoneContext::executeEncryptAE(const RawBuffer &keyId,
 387                                                                                 const Pwd &pwd,
 388                                                                                 const RawBuffer &iv,
 389                                                                                 int tagSizeBits,
 390                                                                                 const RawBuffer &aad,
 391                                                                                 const RawBuffer &data,
 392                                                                                 RawBuffer &out,
 393                                                                                 RawBuffer &tag)
 394 {
 395         // command ID = CMD_ENCRYPT (from km_ta_defines.h)
 396         if (keyId.size() != KM_KEY_ID_SIZE) {
 397                 ThrowErr(Exc::Crypto::InternalError, "TZ Backend received incorrect key buffer");
 398         }
 399
 400         auto sIn = makeSerializer(data, pwd, iv, keyId, aad, tagSizeBits);
 401         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 402         sIn.Serialize(inMemory);
 403
 404         uint32_t outMemorySize = static_cast<uint32_t>(data.size() + CIPHER_EXTRA_PADDING_SIZE);
 405         uint32_t tagSizeBytes = (tagSizeBits + 7) / 8;
 406
 407         TZSerializer sOut;
 408         sOut.Push(new TZSerializableBinary(outMemorySize, false));
 409         sOut.Push(new TZSerializableBinary(tagSizeBytes));
 410         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 411
 412         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 413         op.params[0].value.a = ALGO_AES_GCM;
 414
 415         Execute(CMD_ENCRYPT, &op);
 416
 417         sOut.Deserialize(outMemory);
 418         sOut.Pull(out);
 419         sOut.Pull(tag);
 420 }
 421
 422 void TrustZoneContext::executeDecryptAE(const RawBuffer &keyId,
 423                                                                                 const Pwd &pwd,
 424                                                                                 const RawBuffer &iv,
 425                                                                                 int  tagSizeBits,
 426                                                                                 const RawBuffer &tag,
 427                                                                                 const RawBuffer &aad,
 428                                                                                 const RawBuffer &data,
 429                                                                                 RawBuffer &out)
 430 {
 431         // command ID = CMD_DECRYPT (from km_ta_defines.h)
 432         if (keyId.size() != KM_KEY_ID_SIZE) {
 433                 ThrowErr(Exc::Crypto::InternalError, "TZ Backend received incorrect key buffer");
 434         }
 435
 436         auto sIn = makeSerializer(data, pwd, iv, keyId, aad, tagSizeBits, tag);
 437         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 438         sIn.Serialize(inMemory);
 439
 440         TZSerializer sOut;
 441         sOut.Push(new TZSerializableBinary(data.size()));
 442         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 443
 444         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 445         op.params[0].value.a = ALGO_AES_GCM;
 446
 447         Execute(CMD_DECRYPT, &op);
 448
 449         sOut.Deserialize(outMemory);
 450         sOut.Pull(out);
 451 }
 452
 453 void TrustZoneContext::executeSign(tz_algo_type algo,
 454                                                                 tz_hash_type hash,
 455                                                                 const RawBuffer &keyId,
 456                                                                 const Pwd &pwd,
 457                                                                 const RawBuffer &message,
 458                                                                 RawBuffer &signature)
 459 {
 460         // command ID = CMD_SIGN (from km_ta_defines.h)
 461         if (keyId.size() != KM_KEY_ID_SIZE) {
 462                 ThrowErr(Exc::Crypto::InternalError, "TZ Backend received incorrect key buffer (size = "
 463                         + std::to_string(keyId.size()) + ")");
 464         }
 465
 466         auto sIn = makeSerializer(message, pwd, keyId);
 467         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 468         sIn.Serialize(inMemory);
 469
 470         TZSerializer sOut;
 471         sOut.Push(new TZSerializableBinary(MAX_KEY_SIZE.at(algo), false));
 472         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 473
 474         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 475         op.params[0].value.a = algo;
 476         op.params[0].value.b = hash;
 477
 478         Execute(CMD_SIGN, &op);
 479
 480         sOut.Deserialize(outMemory);
 481         sOut.Pull(signature);
 482 }
 483
 484 int TrustZoneContext::executeVerify(tz_algo_type algo,
 485                                                                         tz_hash_type hash,
 486                                                                         const RawBuffer &keyId,
 487                                                                         const Pwd &pwd,
 488                                                                         const RawBuffer &message,
 489                                                                         const RawBuffer &signature)
 490 {
 491         // command ID = CMD_VERIFY (from km_ta_defines.h)
 492         if (keyId.size() != KM_KEY_ID_SIZE) {
 493                 ThrowErr(Exc::Crypto::InternalError, "TZ Backend received incorrect key buffer (size = "
 494                         + std::to_string(keyId.size()) + ")");
 495         }
 496
 497         auto sIn = makeSerializer(message, signature, pwd, keyId);
 498         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 499         sIn.Serialize(inMemory);
 500
 501         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory);
 502         op.params[0].value.a = algo;
 503         op.params[0].value.b = hash;
 504
 505         Execute(CMD_VERIFY, &op);
 506
 507         int opRet = op.params[0].value.a;
 508         switch (opRet) {
 509         case KM_TA_SUCCESS:
 510                 return CKM_API_SUCCESS;
 511         case KM_TA_ERROR_SIGNATURE:
 512                 LogWarning("Signature verification failed");
 513                 return CKM_API_ERROR_VERIFICATION_FAILED;
 514         default:
 515                 assert(false); // This condition should be checked inside Execute() function
 516                 ThrowErr(Exc::Crypto::InternalError, "Unknown TA error during operation: ", opRet);
 517         }
 518 }
 519
 520 void TrustZoneContext::executeDestroy(const RawBuffer &keyId)
 521 {
 522         // command ID = CMD_DESTROY_KEY (from km_ta_defines.h)
 523         if (keyId.size() != KM_KEY_ID_SIZE) {
 524                 ThrowErr(Exc::Crypto::InternalError, "TZ Backend received incorrect key buffer");
 525         }
 526
 527         auto sIn = makeSerializer(keyId);
 528         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 529         sIn.Serialize(inMemory);
 530
 531         TEEC_Operation op = makeOp(TEEC_VALUE_OUTPUT, inMemory);
 532
 533         Execute(CMD_DESTROY_KEY, &op);
 534 }
 535
 536 void TrustZoneContext::importData(
 537                                 const uint32_t dataType,
 538                                 const RawBuffer &data,
 539                                 const Crypto::EncryptionParams &encData,
 540                                 const RawBuffer &pwd,
 541                                 const RawBuffer &iv,
 542                                 const uint32_t keySizeBits,
 543                                 RawBuffer &pwdTag,
 544                                 const RawBuffer &hash)
 545 {
 546         // command ID = CMD_IMPORT_DATA
 547         LogDebug("TrustZoneContext::importData data size = [" << data.size() << "]");
 548
 549         auto sIn = makeSerializer(
 550                 dataType, data, keySizeBits, encData.iv, encData.tag, EncPwd{pwd, iv}, hash);
 551
 552         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 553         sIn.Serialize(inMemory);
 554
 555         TZSerializer sOut;
 556         if (!pwd.empty()) {
 557                 sOut.Push(new TZSerializableBinary(Params::DEFAULT_AES_GCM_TAG_LEN_BYTES));
 558         }
 559
 560         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 561
 562         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory);
 563         if (!pwd.empty())
 564                 op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 565
 566         Execute(CMD_IMPORT_DATA, &op);
 567
 568         if (!pwd.empty()) {
 569                 sOut.Deserialize(outMemory);
 570                 sOut.Pull(pwdTag);
 571         }
 572
 573         LogDebug("Imported object ID is (hex): " << rawToHexString(hash));
 574 }
 575
 576 void TrustZoneContext::GetDataSize(const RawBuffer &dataId, uint32_t &dataSize)
 577 {
 578         // command ID = CMD_GET_DATA_SIZE
 579         LogDebug("Object ID (passed to CMD_GET_DATA_SIZE) is (hex): " << rawToHexString(dataId));
 580
 581         auto sIn = makeSerializer(dataId);
 582         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 583         sIn.Serialize(inMemory);
 584
 585         TEEC_Operation op = makeOp(TEEC_VALUE_OUTPUT, inMemory);
 586
 587         Execute(CMD_GET_DATA_SIZE, &op);
 588         dataSize = op.params[0].value.b;
 589 }
 590
 591 void TrustZoneContext::getData(const RawBuffer &dataId,
 592                          const Pwd &pwd,
 593                          RawBuffer &data)
 594 {
 595         // command ID = CMD_GET_DATA
 596         LogDebug("Object ID (passed to CMD_GET_DATA) is (hex): " << rawToHexString(dataId));
 597
 598         auto sIn = makeSerializer(dataId, pwd);
 599         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 600         sIn.Serialize(inMemory);
 601
 602         uint32_t data_size = 0;
 603         GetDataSize(dataId, data_size);
 604
 605         LogDebug("GetData data_size = [" << data_size << "]");
 606
 607         TZSerializer sOut;
 608         sOut.Push(new TZSerializableBinary(data_size));
 609         TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 610         sOut.Serialize(outMemory);
 611
 612         TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);
 613
 614         Execute(CMD_GET_DATA, &op);
 615
 616         sOut.Deserialize(outMemory);
 617         sOut.Pull(data);
 618 }
 619
 620
 621 void TrustZoneContext::destroyData(const RawBuffer &dataId)
 622 {
 623         //      command ID = CMD_DESTROY_DATA
 624         LogDebug("Object ID (passed to CMD_GET_DATA) is (hex): " << rawToHexString(dataId));
 625         auto sIn = makeSerializer(dataId);
 626         TrustZoneMemory inMemory(m_Context, sIn.GetSize(), TEEC_MEM_INPUT);
 627         sIn.Serialize(inMemory);
 628
 629         TEEC_Operation op = makeOp(TEEC_VALUE_OUTPUT, inMemory);
 630
 631         Execute(CMD_DESTROY_DATA, &op);
 632 }
 633
 634 void TrustZoneContext::Initialize()
 635 {
 636         TEEC_Operation op;
 637         TEEC_Result result;
 638         uint32_t retOrigin;
 639
 640         op.paramTypes = TEEC_PARAM_TYPES(TEEC_NONE, TEEC_NONE, TEEC_NONE, TEEC_NONE);
 641
 642         result = TEEC_InitializeContext(nullptr, &m_Context);
 643         if (result != TEEC_SUCCESS) {
 644                 ThrowErr(Exc::Crypto::InternalError, "Failed to initialize TEE context: ", result);
 645         }
 646         m_ContextInitialized = true;
 647
 648         result = TEEC_OpenSession(&m_Context, &m_Session, &KEY_MANAGER_TA_UUID, 0, nullptr, &op, &retOrigin);
 649         if (result != TEEC_SUCCESS) {
 650                 ThrowErr(Exc::Crypto::InternalError, "Failed to open session to Key Manager TA: ", result);
 651         }
 652         m_SessionInitialized = true;
 653 }
 654
 655 void TrustZoneContext::Destroy()
 656 {
 657         if (m_SessionInitialized) {
 658                 TEEC_CloseSession(&m_Session);
 659                 m_SessionInitialized = false;
 660         }
 661
 662         if (m_ContextInitialized) {
 663                 TEEC_FinalizeContext(&m_Context);
 664                 m_ContextInitialized = false;
 665         }
 666 }
 667
 668 void TrustZoneContext::Reload()
 669 {
 670         Destroy();
 671         Initialize();
 672 }
 673
 674 void TrustZoneContext::Execute(tz_command commandID, TEEC_Operation* op)
 675 {
 676         uint32_t retOrigin = 0;
 677         LogDebug("Executing TZ operation " << commandID);
 678
 679         TEEC_Result result = TEEC_InvokeCommand(&m_Session, static_cast<unsigned int>(commandID), op, &retOrigin);
 680         if (result != TEEC_SUCCESS) {
 681                 switch (result) {
 682                 case TEEC_ERROR_TARGET_DEAD:
 683                         Reload();
 684                         ThrowErr(Exc::Crypto::InternalError, "TA panicked while executing command ",
 685                                         static_cast<unsigned int>(commandID));
 686                 case TEEC_ERROR_BAD_PARAMETERS:
 687                         ThrowErr(Exc::Crypto::InputParam, "Incorrect parameters provided to TA");
 688                 default:
 689                         ThrowErr(Exc::Crypto::InternalError, "TA failed to invoke command ",
 690                                         static_cast<unsigned int>(commandID), " with error: ", std::hex,
 691                                         static_cast<unsigned int>(result), " with origin: ", std::hex,
 692                                         retOrigin);
 693                 }
 694         }
 695
 696         int ta_ret = op->params[0].value.a;
 697         switch (ta_ret) {
 698         case KM_TA_SUCCESS:
 699         case KM_TA_ERROR_SIGNATURE:
 700                 break;
 701         case KM_TA_ERROR_AUTH_FAILED:
 702                 // Authentication cipher failed - notify with proper exception
 703                 ThrowErr(Exc::AuthenticationFailed, "Crypto operation authentication failed");
 704         default:
 705                 ThrowErr(Exc::Crypto::InternalError, "Unknown TA error during operation: ", ta_ret);
 706         }
 707 }
 708
 709 } // namespace Internals
 710 } // namespace TZ
 711 } // namespace Crypto
 712 } // namespace CKM