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/*
* Copyright 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 ANDROID_HARDWARE_IDENTITY_IDENTITYCREDENTIAL_H
#define ANDROID_HARDWARE_IDENTITY_IDENTITYCREDENTIAL_H
#include <aidl/android/hardware/identity/BnIdentityCredential.h>
#include <aidl/android/hardware/keymaster/HardwareAuthToken.h>
#include <aidl/android/hardware/keymaster/VerificationToken.h>
#include <android/hardware/identity/support/IdentityCredentialSupport.h>
#include <map>
#include <set>
#include <string>
#include <vector>
#include <cppbor.h>
#include "IdentityCredentialStore.h"
#include "PresentationSession.h"
#include "SecureHardwareProxy.h"
namespace aidl::android::hardware::identity {
using ::aidl::android::hardware::keymaster::HardwareAuthToken;
using ::aidl::android::hardware::keymaster::VerificationToken;
using ::android::sp;
using ::android::hardware::identity::SecureHardwarePresentationProxy;
using ::std::map;
using ::std::set;
using ::std::string;
using ::std::vector;
class IdentityCredential : public BnIdentityCredential {
public:
IdentityCredential(sp<SecureHardwareProxyFactory> hwProxyFactory,
const vector<uint8_t>& credentialData,
std::shared_ptr<PresentationSession> session)
: hwProxyFactory_(hwProxyFactory),
credentialData_(credentialData),
session_(std::move(session)),
numStartRetrievalCalls_(0),
expectedDeviceNameSpacesSize_(0) {}
// Parses and decrypts credentialData_, return a status code from
// IIdentityCredentialStore. Must be called right after construction.
int initialize();
// Methods from IIdentityCredential follow.
ndk::ScopedAStatus deleteCredential(vector<uint8_t>* outProofOfDeletionSignature) override;
ndk::ScopedAStatus deleteCredentialWithChallenge(
const vector<uint8_t>& challenge,
vector<uint8_t>* outProofOfDeletionSignature) override;
ndk::ScopedAStatus proveOwnership(const vector<uint8_t>& challenge,
vector<uint8_t>* outProofOfOwnershipSignature) override;
ndk::ScopedAStatus createEphemeralKeyPair(vector<uint8_t>* outKeyPair) override;
ndk::ScopedAStatus setReaderEphemeralPublicKey(const vector<uint8_t>& publicKey) override;
ndk::ScopedAStatus createAuthChallenge(int64_t* outChallenge) override;
ndk::ScopedAStatus setRequestedNamespaces(
const vector<RequestNamespace>& requestNamespaces) override;
ndk::ScopedAStatus setVerificationToken(const VerificationToken& verificationToken) override;
ndk::ScopedAStatus startRetrieval(
const vector<SecureAccessControlProfile>& accessControlProfiles,
const HardwareAuthToken& authToken, const vector<uint8_t>& itemsRequest,
const vector<uint8_t>& signingKeyBlob, const vector<uint8_t>& sessionTranscript,
const vector<uint8_t>& readerSignature, const vector<int32_t>& requestCounts) override;
ndk::ScopedAStatus startRetrieveEntryValue(
const string& nameSpace, const string& name, int32_t entrySize,
const vector<int32_t>& accessControlProfileIds) override;
ndk::ScopedAStatus retrieveEntryValue(const vector<uint8_t>& encryptedContent,
vector<uint8_t>* outContent) override;
ndk::ScopedAStatus finishRetrieval(vector<uint8_t>* outMac,
vector<uint8_t>* outDeviceNameSpaces) override;
ndk::ScopedAStatus generateSigningKeyPair(vector<uint8_t>* outSigningKeyBlob,
Certificate* outSigningKeyCertificate) override;
ndk::ScopedAStatus updateCredential(
shared_ptr<IWritableIdentityCredential>* outWritableCredential) override;
private:
ndk::ScopedAStatus deleteCredentialCommon(const vector<uint8_t>& challenge,
bool includeChallenge,
vector<uint8_t>* outProofOfDeletionSignature);
// Creates and initializes hwProxy_.
ndk::ScopedAStatus ensureHwProxy();
// Set by constructor
sp<SecureHardwareProxyFactory> hwProxyFactory_;
vector<uint8_t> credentialData_;
shared_ptr<PresentationSession> session_;
int numStartRetrievalCalls_;
// Set by initialize()
string docType_;
bool testCredential_;
vector<uint8_t> encryptedCredentialKeys_;
// Set by ensureHwProxy()
sp<SecureHardwarePresentationProxy> hwProxy_;
// Set by createEphemeralKeyPair()
vector<uint8_t> ephemeralPublicKey_;
// Set by setReaderEphemeralPublicKey()
vector<uint8_t> readerPublicKey_;
// Set by setRequestedNamespaces()
vector<RequestNamespace> requestNamespaces_;
// Set by setVerificationToken().
VerificationToken verificationToken_;
// Set at startRetrieval() time.
vector<uint8_t> signingKeyBlob_;
vector<uint8_t> sessionTranscript_;
vector<uint8_t> itemsRequest_;
vector<int32_t> requestCountsRemaining_;
map<string, set<string>> requestedNameSpacesAndNames_;
cppbor::Map deviceNameSpacesMap_;
cppbor::Map currentNameSpaceDeviceNameSpacesMap_;
// Calculated at startRetrieval() time.
size_t expectedDeviceNameSpacesSize_;
vector<unsigned int> expectedNumEntriesPerNamespace_;
// Set at startRetrieveEntryValue() time.
string currentNameSpace_;
string currentName_;
vector<int32_t> currentAccessControlProfileIds_;
size_t entryRemainingBytes_;
vector<uint8_t> entryValue_;
void calcDeviceNameSpacesSize(uint32_t accessControlProfileMask);
};
} // namespace aidl::android::hardware::identity
#endif // ANDROID_HARDWARE_IDENTITY_IDENTITYCREDENTIAL_H
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