| // Copyright 2020 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CRYPTOHOME_TPM_BOUND_TO_PCR_AUTH_BLOCK_H_ |
| #define CRYPTOHOME_TPM_BOUND_TO_PCR_AUTH_BLOCK_H_ |
| |
| #include "cryptohome/auth_block.h" |
| |
| #include <memory> |
| #include <string> |
| |
| #include <base/gtest_prod_util.h> |
| #include <base/macros.h> |
| #include <base/threading/thread.h> |
| |
| #include "cryptohome/auth_block_state.h" |
| #include "cryptohome/crypto.h" |
| #include "cryptohome/cryptohome_keys_manager.h" |
| #include "cryptohome/tpm.h" |
| #include "cryptohome/tpm_auth_block_utils.h" |
| #include "cryptohome/vault_keyset.pb.h" |
| |
| namespace cryptohome { |
| |
| class TpmBoundToPcrAuthBlock : public AuthBlock { |
| public: |
| TpmBoundToPcrAuthBlock(Tpm* tpm, |
| CryptohomeKeysManager* cryptohome_keys_manager); |
| TpmBoundToPcrAuthBlock(const TpmBoundToPcrAuthBlock&) = delete; |
| TpmBoundToPcrAuthBlock& operator=(const TpmBoundToPcrAuthBlock&) = delete; |
| |
| base::Optional<AuthBlockState> Create(const AuthInput& user_input, |
| KeyBlobs* key_blobs, |
| CryptoError* error) override; |
| |
| bool Derive(const AuthInput& auth_input, |
| const AuthBlockState& state, |
| KeyBlobs* key_blobs, |
| CryptoError* error) override; |
| |
| private: |
| // Decrypt the |vault_key| that is bound to PCR, returning the |vkk_iv| |
| // and |vkk_key|. |
| bool DecryptTpmBoundToPcr(const brillo::SecureBlob& vault_key, |
| const brillo::SecureBlob& tpm_key, |
| const brillo::SecureBlob& salt, |
| CryptoError* error, |
| brillo::SecureBlob* vkk_iv, |
| brillo::SecureBlob* vkk_key) const; |
| |
| Tpm* tpm_; |
| CryptohomeKeyLoader* cryptohome_key_loader_; |
| TpmAuthBlockUtils utils_; |
| |
| // The thread for performing scrypt operations. |
| std::unique_ptr<base::Thread> scrypt_thread_; |
| // The task runner that belongs to the scrypt thread. |
| scoped_refptr<base::SingleThreadTaskRunner> scrypt_task_runner_; |
| |
| FRIEND_TEST_ALL_PREFIXES(TPMAuthBlockTest, DecryptBoundToPcrTest); |
| FRIEND_TEST_ALL_PREFIXES(TPMAuthBlockTest, DecryptBoundToPcrNoPreloadTest); |
| }; |
| |
| } // namespace cryptohome |
| |
| #endif // CRYPTOHOME_TPM_BOUND_TO_PCR_AUTH_BLOCK_H_ |