1 // Copyright 2017 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 //////////////////////////////////////////////////////////////////////////////// 16 17 package com.google.crypto.tink; 18 19 import com.google.crypto.tink.proto.KeyData; 20 import com.google.crypto.tink.proto.Keyset; 21 import com.google.protobuf.ExtensionRegistryLite; 22 import com.google.protobuf.InvalidProtocolBufferException; 23 import java.io.IOException; 24 import java.security.GeneralSecurityException; 25 26 /** 27 * Static methods for reading cleartext keysets that don't contain any secret key material. 28 * 29 * @since 1.0.0 30 * @deprecated use {@link KeysetHandle#readNoSecret} instead 31 */ 32 @Deprecated 33 public final class NoSecretKeysetHandle { 34 /** 35 * @return a new keyset handle from {@code serialized} which is a serialized {@link Keyset}. 36 * @throws GeneralSecurityException 37 * @deprecated use {@link NoSecretKeysetHandle#read} instead 38 */ 39 @SuppressWarnings("UnusedException") 40 @Deprecated parseFrom(final byte[] serialized)41 public static final KeysetHandle parseFrom(final byte[] serialized) 42 throws GeneralSecurityException { 43 try { 44 Keyset keyset = Keyset.parseFrom(serialized, ExtensionRegistryLite.getEmptyRegistry()); 45 validate(keyset); 46 return KeysetHandle.fromKeyset(keyset); 47 } catch (InvalidProtocolBufferException e) { 48 throw new GeneralSecurityException("invalid keyset"); 49 } 50 } 51 52 /** 53 * @return a new keyset handle from a keyset obtained from {@code reader}. 54 * @throws GeneralSecurityException 55 */ read(KeysetReader reader)56 public static final KeysetHandle read(KeysetReader reader) 57 throws GeneralSecurityException, IOException { 58 Keyset keyset = reader.read(); 59 validate(keyset); 60 return KeysetHandle.fromKeyset(keyset); 61 } 62 63 /** 64 * Validates that {@code keyset} doesn't contain any secret key material. 65 * 66 * @throws GeneralSecurityException if {@code keyset} contains secret key material. 67 */ validate(Keyset keyset)68 private static void validate(Keyset keyset) throws GeneralSecurityException { 69 for (Keyset.Key key : keyset.getKeyList()) { 70 if (key.getKeyData().getKeyMaterialType() == KeyData.KeyMaterialType.UNKNOWN_KEYMATERIAL 71 || key.getKeyData().getKeyMaterialType() == KeyData.KeyMaterialType.SYMMETRIC 72 || key.getKeyData().getKeyMaterialType() == KeyData.KeyMaterialType.ASYMMETRIC_PRIVATE) { 73 throw new GeneralSecurityException("keyset contains secret key material"); 74 } 75 } 76 } 77 NoSecretKeysetHandle()78 private NoSecretKeysetHandle() {} 79 } 80