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/*
* Copyright (C) 2018 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.
*/
package android.hardware.biometrics;
import android.annotation.NonNull;
import android.security.identity.IdentityCredential;
import android.security.identity.PresentationSession;
import android.security.keystore2.AndroidKeyStoreProvider;
import java.security.Signature;
import javax.crypto.Cipher;
import javax.crypto.Mac;
/**
* A wrapper class for the crypto objects supported by BiometricPrompt and FingerprintManager.
* Currently the framework supports {@link Signature}, {@link Cipher}, {@link Mac},
* {@link IdentityCredential}, and {@link PresentationSession} objects.
* @hide
*/
public class CryptoObject {
private final Object mCrypto;
public CryptoObject(@NonNull Signature signature) {
mCrypto = signature;
}
public CryptoObject(@NonNull Cipher cipher) {
mCrypto = cipher;
}
public CryptoObject(@NonNull Mac mac) {
mCrypto = mac;
}
/**
* Create from a {@link IdentityCredential} object.
*
* @param credential a {@link IdentityCredential} object.
* @deprecated Use {@link PresentationSession} instead of {@link IdentityCredential}.
*/
@Deprecated
public CryptoObject(@NonNull IdentityCredential credential) {
mCrypto = credential;
}
public CryptoObject(@NonNull PresentationSession session) {
mCrypto = session;
}
/**
* Get {@link Signature} object.
* @return {@link Signature} object or null if this doesn't contain one.
*/
public Signature getSignature() {
return mCrypto instanceof Signature ? (Signature) mCrypto : null;
}
/**
* Get {@link Cipher} object.
* @return {@link Cipher} object or null if this doesn't contain one.
*/
public Cipher getCipher() {
return mCrypto instanceof Cipher ? (Cipher) mCrypto : null;
}
/**
* Get {@link Mac} object.
* @return {@link Mac} object or null if this doesn't contain one.
*/
public Mac getMac() {
return mCrypto instanceof Mac ? (Mac) mCrypto : null;
}
/**
* Get {@link IdentityCredential} object.
* @return {@link IdentityCredential} object or null if this doesn't contain one.
* @deprecated Use {@link PresentationSession} instead of {@link IdentityCredential}.
*/
@Deprecated
public IdentityCredential getIdentityCredential() {
return mCrypto instanceof IdentityCredential ? (IdentityCredential) mCrypto : null;
}
/**
* Get {@link PresentationSession} object.
* @return {@link PresentationSession} object or null if this doesn't contain one.
*/
public PresentationSession getPresentationSession() {
return mCrypto instanceof PresentationSession ? (PresentationSession) mCrypto : null;
}
/**
* @hide
* @return the opId associated with this object or 0 if none
*/
public final long getOpId() {
if (mCrypto == null) {
return 0;
} else if (mCrypto instanceof IdentityCredential) {
return ((IdentityCredential) mCrypto).getCredstoreOperationHandle();
} else if (mCrypto instanceof PresentationSession) {
return ((PresentationSession) mCrypto).getCredstoreOperationHandle();
}
return AndroidKeyStoreProvider.getKeyStoreOperationHandle(mCrypto);
}
}
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