platform_system_security/identity/WritableCredential.h
David Zeuthen e2a78a48c0 credstore: Pass additional information to Identity Credential HAL.
Without this extra information passed upfront it's not practical to
implement a HAL which incrementally builds up cryptographically
authenticated data.

This information is conveyed by using two new methods on version 2 of
the Identity Credential HAL. If these methods are not implemented (if
a version 1 HAL is running) the invocation fails and we handle this
gracefully by just ignoring the error.

Bug: 154631410
Test: atest VtsHalIdentityTargetTest
Test: atest android.security.identity.cts

Change-Id: I17d516e41e800f58daa4c11dcca0305c80740d5b
2020-04-29 09:52:51 -04:00

69 lines
2.4 KiB
C++

/*
* Copyright (c) 2019, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SYSTEM_SECURITY_WRITABLE_CREDENTIAL_H_
#define SYSTEM_SECURITY_WRITABLE_CREDENTIAL_H_
#include <string>
#include <vector>
#include <android/security/identity/BnWritableCredential.h>
#include <android/hardware/identity/IIdentityCredentialStore.h>
namespace android {
namespace security {
namespace identity {
using ::android::binder::Status;
using ::android::hardware::identity::IWritableIdentityCredential;
using ::std::string;
using ::std::vector;
class WritableCredential : public BnWritableCredential {
public:
WritableCredential(const string& dataPath, const string& credentialName, const string& docType,
size_t dataChunkSize, sp<IWritableIdentityCredential> halBinder);
~WritableCredential();
// IWritableCredential overrides
Status getCredentialKeyCertificateChain(const vector<uint8_t>& challenge,
vector<uint8_t>* _aidl_return) override;
Status personalize(const vector<AccessControlProfileParcel>& accessControlProfiles,
const vector<EntryNamespaceParcel>& entryNamespaces, int64_t secureUserId,
vector<uint8_t>* _aidl_return) override;
private:
string dataPath_;
string credentialName_;
string docType_;
size_t dataChunkSize_;
sp<IWritableIdentityCredential> halBinder_;
vector<uint8_t> attestationCertificate_;
ssize_t calcExpectedProofOfProvisioningSize(
const vector<AccessControlProfileParcel>& accessControlProfiles,
const vector<EntryNamespaceParcel>& entryNamespaces);
Status ensureAttestationCertificateExists(const vector<uint8_t>& challenge);
};
} // namespace identity
} // namespace security
} // namespace android
#endif // SYSTEM_SECURITY_WRITABLE_CREDENTIAL_H_