| /* GENERATED SOURCE. DO NOT MODIFY. */ |
| /* |
| * Copyright (C) 2017 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 com.android.org.conscrypt; |
| |
| import java.io.IOException; |
| import java.security.AlgorithmParametersSpi; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.spec.AlgorithmParameterSpec; |
| import java.security.spec.ECGenParameterSpec; |
| import java.security.spec.ECParameterSpec; |
| import java.security.spec.InvalidParameterSpecException; |
| |
| /** |
| * AlgorithmParameters implementation for elliptic curves. The only supported encoding format is |
| * ASN.1, as specified in RFC 3279, section 2.3.5. However, only named curves are supported. |
| * @hide This class is not part of the Android public SDK API |
| */ |
| @Internal |
| public class ECParameters extends AlgorithmParametersSpi { |
| |
| private OpenSSLECGroupContext curve; |
| |
| public ECParameters() {} |
| |
| @Override |
| protected void engineInit(AlgorithmParameterSpec algorithmParameterSpec) |
| throws InvalidParameterSpecException { |
| if (algorithmParameterSpec instanceof ECGenParameterSpec) { |
| String newCurveName = ((ECGenParameterSpec) algorithmParameterSpec).getName(); |
| OpenSSLECGroupContext newCurve = OpenSSLECGroupContext.getCurveByName(newCurveName); |
| if (newCurve == null) { |
| throw new InvalidParameterSpecException("Unknown EC curve name: " + newCurveName); |
| } |
| this.curve = newCurve; |
| } else if (algorithmParameterSpec instanceof ECParameterSpec) { |
| ECParameterSpec ecParamSpec = (ECParameterSpec) algorithmParameterSpec; |
| try { |
| OpenSSLECGroupContext newCurve = OpenSSLECGroupContext.getInstance(ecParamSpec); |
| if (newCurve == null) { |
| throw new InvalidParameterSpecException("Unknown EC curve: " + ecParamSpec); |
| } |
| this.curve = newCurve; |
| } catch (InvalidAlgorithmParameterException e) { |
| throw new InvalidParameterSpecException(e.getMessage()); |
| } |
| } else { |
| throw new InvalidParameterSpecException( |
| "Only ECParameterSpec and ECGenParameterSpec are supported"); |
| } |
| } |
| |
| @Override |
| protected void engineInit(byte[] bytes) throws IOException { |
| long ref = NativeCrypto.EC_KEY_parse_curve_name(bytes); |
| if (ref == 0) { |
| throw new IOException("Error reading ASN.1 encoding"); |
| } |
| this.curve = new OpenSSLECGroupContext(new NativeRef.EC_GROUP(ref)); |
| } |
| |
| @Override |
| protected void engineInit(byte[] bytes, String format) throws IOException { |
| if (format == null || format.equals("ASN.1")) { |
| engineInit(bytes); |
| } else { |
| throw new IOException("Unsupported format: " + format); |
| } |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| protected <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> aClass) |
| throws InvalidParameterSpecException { |
| if (aClass == ECParameterSpec.class) { |
| return (T) curve.getECParameterSpec(); |
| } else if (aClass == ECGenParameterSpec.class) { |
| return (T) new ECGenParameterSpec(curve.getCurveName()); |
| } else { |
| throw new InvalidParameterSpecException("Unsupported class: " + aClass); |
| } |
| } |
| |
| @Override |
| protected byte[] engineGetEncoded() throws IOException { |
| return NativeCrypto.EC_KEY_marshal_curve_name(curve.getNativeRef()); |
| } |
| |
| @Override |
| protected byte[] engineGetEncoded(String format) throws IOException { |
| if (format == null || format.equals("ASN.1")) { |
| return engineGetEncoded(); |
| } |
| throw new IOException("Unsupported format: " + format); |
| } |
| |
| @Override |
| protected String engineToString() { |
| return "Conscrypt EC AlgorithmParameters"; |
| } |
| } |