| /* |
| * Copyright (C) 2012 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; |
| |
| import java.security.Provider; |
| |
| import javax.crypto.Cipher; |
| import javax.crypto.Mac; |
| |
| /** |
| * A provider focused on providing JCA interfaces for the Android KeyStore. |
| * |
| * @hide |
| */ |
| public class AndroidKeyStoreProvider extends Provider { |
| public static final String PROVIDER_NAME = "AndroidKeyStore"; |
| |
| // IMPLEMENTATION NOTE: Class names are hard-coded in this provider to avoid loading these |
| // classes when this provider is instantiated and installed early on during each app's |
| // initialization process. |
| |
| private static final String PACKAGE_NAME = "android.security"; |
| private static final String KEYSTORE_SECRET_KEY_CLASS_NAME = |
| PACKAGE_NAME + ".KeyStoreSecretKey"; |
| |
| public AndroidKeyStoreProvider() { |
| super(PROVIDER_NAME, 1.0, "Android KeyStore security provider"); |
| |
| // java.security.KeyStore |
| put("KeyStore.AndroidKeyStore", PACKAGE_NAME + ".AndroidKeyStore"); |
| |
| // java.security.KeyPairGenerator |
| put("KeyPairGenerator.EC", PACKAGE_NAME + ".AndroidKeyPairGenerator$EC"); |
| put("KeyPairGenerator.RSA", PACKAGE_NAME + ".AndroidKeyPairGenerator$RSA"); |
| |
| // javax.crypto.KeyGenerator |
| put("KeyGenerator.AES", PACKAGE_NAME + ".KeyStoreKeyGeneratorSpi$AES"); |
| put("KeyGenerator.HmacSHA1", PACKAGE_NAME + ".KeyStoreKeyGeneratorSpi$HmacSHA1"); |
| put("KeyGenerator.HmacSHA224", PACKAGE_NAME + ".KeyStoreKeyGeneratorSpi$HmacSHA224"); |
| put("KeyGenerator.HmacSHA256", PACKAGE_NAME + ".KeyStoreKeyGeneratorSpi$HmacSHA256"); |
| put("KeyGenerator.HmacSHA384", PACKAGE_NAME + ".KeyStoreKeyGeneratorSpi$HmacSHA384"); |
| put("KeyGenerator.HmacSHA512", PACKAGE_NAME + ".KeyStoreKeyGeneratorSpi$HmacSHA512"); |
| |
| // java.security.SecretKeyFactory |
| putSecretKeyFactoryImpl("AES"); |
| putSecretKeyFactoryImpl("HmacSHA1"); |
| putSecretKeyFactoryImpl("HmacSHA224"); |
| putSecretKeyFactoryImpl("HmacSHA256"); |
| putSecretKeyFactoryImpl("HmacSHA384"); |
| putSecretKeyFactoryImpl("HmacSHA512"); |
| |
| // javax.crypto.Mac |
| putMacImpl("HmacSHA1", PACKAGE_NAME + ".KeyStoreHmacSpi$HmacSHA1"); |
| putMacImpl("HmacSHA224", PACKAGE_NAME + ".KeyStoreHmacSpi$HmacSHA224"); |
| putMacImpl("HmacSHA256", PACKAGE_NAME + ".KeyStoreHmacSpi$HmacSHA256"); |
| putMacImpl("HmacSHA384", PACKAGE_NAME + ".KeyStoreHmacSpi$HmacSHA384"); |
| putMacImpl("HmacSHA512", PACKAGE_NAME + ".KeyStoreHmacSpi$HmacSHA512"); |
| |
| // javax.crypto.Cipher |
| putSymmetricCipherImpl("AES/ECB/NoPadding", |
| PACKAGE_NAME + ".KeyStoreCipherSpi$AES$ECB$NoPadding"); |
| putSymmetricCipherImpl("AES/ECB/PKCS7Padding", |
| PACKAGE_NAME + ".KeyStoreCipherSpi$AES$ECB$PKCS7Padding"); |
| |
| putSymmetricCipherImpl("AES/CBC/NoPadding", |
| PACKAGE_NAME + ".KeyStoreCipherSpi$AES$CBC$NoPadding"); |
| putSymmetricCipherImpl("AES/CBC/PKCS7Padding", |
| PACKAGE_NAME + ".KeyStoreCipherSpi$AES$CBC$PKCS7Padding"); |
| |
| putSymmetricCipherImpl("AES/CTR/NoPadding", |
| PACKAGE_NAME + ".KeyStoreCipherSpi$AES$CTR$NoPadding"); |
| } |
| |
| private void putSecretKeyFactoryImpl(String algorithm) { |
| put("SecretKeyFactory." + algorithm, PACKAGE_NAME + ".KeyStoreSecretKeyFactorySpi"); |
| } |
| |
| private void putMacImpl(String algorithm, String implClass) { |
| put("Mac." + algorithm, implClass); |
| put("Mac." + algorithm + " SupportedKeyClasses", KEYSTORE_SECRET_KEY_CLASS_NAME); |
| } |
| |
| private void putSymmetricCipherImpl(String transformation, String implClass) { |
| put("Cipher." + transformation, implClass); |
| put("Cipher." + transformation + " SupportedKeyClasses", KEYSTORE_SECRET_KEY_CLASS_NAME); |
| } |
| |
| /** |
| * Gets the {@link KeyStore} operation handle corresponding to the provided JCA crypto |
| * primitive. |
| * |
| * <p>The following primitives are supported: {@link Cipher} and {@link Mac}. |
| * |
| * @return KeyStore operation handle or {@code null} if the provided primitive's KeyStore |
| * operation is not in progress. |
| * |
| * @throws IllegalArgumentException if the provided primitive is not supported or is not backed |
| * by AndroidKeyStore provider. |
| * @throws IllegalStateException if the provided primitive is not initialized. |
| */ |
| public static Long getKeyStoreOperationHandle(Object cryptoPrimitive) { |
| if (cryptoPrimitive == null) { |
| throw new NullPointerException(); |
| } |
| Object spi; |
| if (cryptoPrimitive instanceof Mac) { |
| spi = ((Mac) cryptoPrimitive).getCurrentSpi(); |
| } else if (cryptoPrimitive instanceof Cipher) { |
| spi = ((Cipher) cryptoPrimitive).getCurrentSpi(); |
| } else { |
| throw new IllegalArgumentException("Unsupported crypto primitive: " + cryptoPrimitive); |
| } |
| if (spi == null) { |
| throw new IllegalStateException("Crypto primitive not initialized"); |
| } else if (!(spi instanceof KeyStoreCryptoOperation)) { |
| throw new IllegalArgumentException( |
| "Crypto primitive not backed by AndroidKeyStore provider: " + cryptoPrimitive |
| + ", spi: " + spi); |
| } |
| return ((KeyStoreCryptoOperation) spi).getOperationHandle(); |
| } |
| } |