| /* |
| * 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. |
| */ |
| |
| package android.security.identity; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.os.ServiceManager; |
| |
| class CredstoreIdentityCredentialStore extends IdentityCredentialStore { |
| |
| private static final String TAG = "CredstoreIdentityCredentialStore"; |
| |
| private Context mContext = null; |
| private ICredentialStore mStore = null; |
| |
| private CredstoreIdentityCredentialStore(@NonNull Context context, ICredentialStore store) { |
| mContext = context; |
| mStore = store; |
| } |
| |
| static CredstoreIdentityCredentialStore getInstanceForType(@NonNull Context context, |
| int credentialStoreType) { |
| ICredentialStoreFactory storeFactory = |
| ICredentialStoreFactory.Stub.asInterface( |
| ServiceManager.getService("android.security.identity")); |
| if (storeFactory == null) { |
| // This can happen if credstore is not running or not installed. |
| return null; |
| } |
| |
| ICredentialStore credStore = null; |
| try { |
| credStore = storeFactory.getCredentialStore(credentialStoreType); |
| } catch (android.os.RemoteException e) { |
| throw new RuntimeException("Unexpected RemoteException ", e); |
| } catch (android.os.ServiceSpecificException e) { |
| if (e.errorCode == ICredentialStore.ERROR_GENERIC) { |
| return null; |
| } else { |
| throw new RuntimeException("Unexpected ServiceSpecificException with code " |
| + e.errorCode, e); |
| } |
| } |
| if (credStore == null) { |
| return null; |
| } |
| |
| return new CredstoreIdentityCredentialStore(context, credStore); |
| } |
| |
| private static CredstoreIdentityCredentialStore sInstanceDefault = null; |
| private static CredstoreIdentityCredentialStore sInstanceDirectAccess = null; |
| |
| public static @Nullable IdentityCredentialStore getInstance(@NonNull Context context) { |
| if (sInstanceDefault == null) { |
| sInstanceDefault = getInstanceForType(context, |
| ICredentialStoreFactory.CREDENTIAL_STORE_TYPE_DEFAULT); |
| } |
| return sInstanceDefault; |
| } |
| |
| public static @Nullable IdentityCredentialStore getDirectAccessInstance(@NonNull |
| Context context) { |
| if (sInstanceDirectAccess == null) { |
| sInstanceDirectAccess = getInstanceForType(context, |
| ICredentialStoreFactory.CREDENTIAL_STORE_TYPE_DIRECT_ACCESS); |
| } |
| return sInstanceDirectAccess; |
| } |
| |
| @Override |
| public @NonNull String[] getSupportedDocTypes() { |
| try { |
| SecurityHardwareInfoParcel info; |
| info = mStore.getSecurityHardwareInfo(); |
| return info.supportedDocTypes; |
| } catch (android.os.RemoteException e) { |
| throw new RuntimeException("Unexpected RemoteException ", e); |
| } catch (android.os.ServiceSpecificException e) { |
| throw new RuntimeException("Unexpected ServiceSpecificException with code " |
| + e.errorCode, e); |
| } |
| } |
| |
| @Override public @NonNull WritableIdentityCredential createCredential( |
| @NonNull String credentialName, |
| @NonNull String docType) throws AlreadyPersonalizedException, |
| DocTypeNotSupportedException { |
| try { |
| IWritableCredential wc; |
| wc = mStore.createCredential(credentialName, docType); |
| return new CredstoreWritableIdentityCredential(mContext, credentialName, docType, wc); |
| } catch (android.os.RemoteException e) { |
| throw new RuntimeException("Unexpected RemoteException ", e); |
| } catch (android.os.ServiceSpecificException e) { |
| if (e.errorCode == ICredentialStore.ERROR_ALREADY_PERSONALIZED) { |
| throw new AlreadyPersonalizedException(e.getMessage(), e); |
| } else if (e.errorCode == ICredentialStore.ERROR_DOCUMENT_TYPE_NOT_SUPPORTED) { |
| throw new DocTypeNotSupportedException(e.getMessage(), e); |
| } else { |
| throw new RuntimeException("Unexpected ServiceSpecificException with code " |
| + e.errorCode, e); |
| } |
| } |
| } |
| |
| @Override public @Nullable IdentityCredential getCredentialByName( |
| @NonNull String credentialName, |
| @Ciphersuite int cipherSuite) throws CipherSuiteNotSupportedException { |
| try { |
| ICredential credstoreCredential; |
| credstoreCredential = mStore.getCredentialByName(credentialName, cipherSuite); |
| return new CredstoreIdentityCredential(mContext, credentialName, cipherSuite, |
| credstoreCredential); |
| } catch (android.os.RemoteException e) { |
| throw new RuntimeException("Unexpected RemoteException ", e); |
| } catch (android.os.ServiceSpecificException e) { |
| if (e.errorCode == ICredentialStore.ERROR_NO_SUCH_CREDENTIAL) { |
| return null; |
| } else if (e.errorCode == ICredentialStore.ERROR_CIPHER_SUITE_NOT_SUPPORTED) { |
| throw new CipherSuiteNotSupportedException(e.getMessage(), e); |
| } else { |
| throw new RuntimeException("Unexpected ServiceSpecificException with code " |
| + e.errorCode, e); |
| } |
| } |
| } |
| |
| @Override |
| public @Nullable byte[] deleteCredentialByName(@NonNull String credentialName) { |
| ICredential credstoreCredential = null; |
| try { |
| try { |
| credstoreCredential = mStore.getCredentialByName(credentialName, |
| CIPHERSUITE_ECDHE_HKDF_ECDSA_WITH_AES_256_GCM_SHA256); |
| } catch (android.os.ServiceSpecificException e) { |
| if (e.errorCode == ICredentialStore.ERROR_NO_SUCH_CREDENTIAL) { |
| return null; |
| } |
| } |
| byte[] proofOfDeletion = credstoreCredential.deleteCredential(); |
| return proofOfDeletion; |
| } catch (android.os.RemoteException e) { |
| throw new RuntimeException("Unexpected RemoteException ", e); |
| } catch (android.os.ServiceSpecificException e) { |
| throw new RuntimeException("Unexpected ServiceSpecificException with code " |
| + e.errorCode, e); |
| } |
| } |
| |
| } |