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90 lines
3.4 KiB
90 lines
3.4 KiB
// |
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// Copyright (C) 2015 The Android Open Source Project |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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#ifndef TRUNKS_POLICY_SESSION_H_ |
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#define TRUNKS_POLICY_SESSION_H_ |
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#include <string> |
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#include <vector> |
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#include <base/macros.h> |
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#include "trunks/tpm_generated.h" |
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namespace trunks { |
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class AuthorizationDelegate; |
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// PolicySession is an interface for managing policy backed sessions for |
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// authorization and parameter encryption. |
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class PolicySession { |
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public: |
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PolicySession() {} |
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virtual ~PolicySession() {} |
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// Returns an authorization delegate for this session. Ownership of the |
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// delegate pointer is retained by the session. |
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virtual AuthorizationDelegate* GetDelegate() = 0; |
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// Starts a salted session which is bound to |bind_entity| with |
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// |bind_authorization_value|. Encryption is enabled if |enable_encryption| is |
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// true. The session remains active until this object is destroyed or another |
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// session is started with a call to Start*Session. |
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virtual TPM_RC StartBoundSession(TPMI_DH_ENTITY bind_entity, |
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const std::string& bind_authorization_value, |
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bool enable_encryption) = 0; |
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// Starts a salted, unbound session. Encryption is enabled if |
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// |enable_encryption| is true. The session remains active until this object |
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// is destroyed or another session is started with a call to Start*Session. |
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virtual TPM_RC StartUnboundSession(bool enable_encryption) = 0; |
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// This method is used to get the current PolicyDigest of the PolicySession. |
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virtual TPM_RC GetDigest(std::string* digest) = 0; |
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// This method is used to construct a complex policy. It takes a list |
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// of policy digests. After the command is executed, the policy represented |
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// by this session is the OR of the provided policies. |
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virtual TPM_RC PolicyOR(const std::vector<std::string>& digests) = 0; |
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// This method binds the PolicySession to a provided PCR value. If the empty |
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// string is provided, the PolicySession is bound to the current PCR value. |
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virtual TPM_RC PolicyPCR(uint32_t pcr_index, |
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const std::string& pcr_value) = 0; |
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// This method binds the PolicySession to a specified CommandCode. |
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// Once called, this Session can only be used to authorize actions on the |
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// provided CommandCode. |
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virtual TPM_RC PolicyCommandCode(TPM_CC command_code) = 0; |
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// This method specifies that Authorization Values need to be included in |
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// HMAC computation done by the AuthorizationDelegate. |
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virtual TPM_RC PolicyAuthValue() = 0; |
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// Reset a policy session to its original state. |
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virtual TPM_RC PolicyRestart() = 0; |
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// Sets the current entity authorization value. This can be safely called |
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// while the session is active and subsequent commands will use the value. |
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virtual void SetEntityAuthorizationValue(const std::string& value) = 0; |
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private: |
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DISALLOW_COPY_AND_ASSIGN(PolicySession); |
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}; |
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} // namespace trunks |
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#endif // TRUNKS_POLICY_SESSION_H_
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