1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.conscrypt; 18 19 import java.io.IOException; 20 import java.io.ObjectInputStream; 21 import java.io.ObjectOutputStream; 22 import java.math.BigInteger; 23 import java.security.InvalidKeyException; 24 import java.security.interfaces.RSAPublicKey; 25 import java.security.spec.InvalidKeySpecException; 26 import java.security.spec.RSAPublicKeySpec; 27 28 /** 29 * An implementation of {@link java.security.PublicKey} for RSA keys which uses BoringSSL to 30 * perform all the operations. 31 */ 32 @Internal 33 public class OpenSSLRSAPublicKey implements RSAPublicKey, OpenSSLKeyHolder { 34 private static final long serialVersionUID = 123125005824688292L; 35 36 private transient OpenSSLKey key; 37 38 private BigInteger publicExponent; 39 40 private BigInteger modulus; 41 42 private transient boolean fetchedParams; 43 OpenSSLRSAPublicKey(OpenSSLKey key)44 OpenSSLRSAPublicKey(OpenSSLKey key) { 45 this.key = key; 46 } 47 48 @Override getOpenSSLKey()49 public OpenSSLKey getOpenSSLKey() { 50 return key; 51 } 52 OpenSSLRSAPublicKey(RSAPublicKeySpec spec)53 OpenSSLRSAPublicKey(RSAPublicKeySpec spec) throws InvalidKeySpecException { 54 try { 55 key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA( 56 spec.getModulus().toByteArray(), 57 spec.getPublicExponent().toByteArray(), 58 null, 59 null, 60 null, 61 null, 62 null, 63 null)); 64 } catch (Exception e) { 65 throw new InvalidKeySpecException(e); 66 } 67 } 68 getInstance(RSAPublicKey rsaPublicKey)69 static OpenSSLKey getInstance(RSAPublicKey rsaPublicKey) throws InvalidKeyException { 70 try { 71 return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA( 72 rsaPublicKey.getModulus().toByteArray(), 73 rsaPublicKey.getPublicExponent().toByteArray(), 74 null, 75 null, 76 null, 77 null, 78 null, 79 null)); 80 } catch (Exception e) { 81 throw new InvalidKeyException(e); 82 } 83 } 84 85 @Override getAlgorithm()86 public String getAlgorithm() { 87 return "RSA"; 88 } 89 90 @Override getFormat()91 public String getFormat() { 92 return "X.509"; 93 } 94 95 @Override getEncoded()96 public byte[] getEncoded() { 97 return NativeCrypto.EVP_marshal_public_key(key.getNativeRef()); 98 } 99 ensureReadParams()100 private synchronized void ensureReadParams() { 101 if (fetchedParams) { 102 return; 103 } 104 105 byte[][] params = NativeCrypto.get_RSA_public_params(key.getNativeRef()); 106 modulus = new BigInteger(params[0]); 107 publicExponent = new BigInteger(params[1]); 108 109 fetchedParams = true; 110 } 111 112 @Override getModulus()113 public BigInteger getModulus() { 114 ensureReadParams(); 115 return modulus; 116 } 117 118 @Override getPublicExponent()119 public BigInteger getPublicExponent() { 120 ensureReadParams(); 121 return publicExponent; 122 } 123 124 @Override equals(Object o)125 public boolean equals(Object o) { 126 if (o == this) { 127 return true; 128 } 129 130 if (o instanceof OpenSSLRSAPublicKey) { 131 OpenSSLRSAPublicKey other = (OpenSSLRSAPublicKey) o; 132 133 /* 134 * We can shortcut the true case, but it still may be equivalent but 135 * different copies. 136 */ 137 if (key.equals(other.getOpenSSLKey())) { 138 return true; 139 } 140 } 141 142 if (!(o instanceof RSAPublicKey)) { 143 return false; 144 } 145 146 ensureReadParams(); 147 148 RSAPublicKey other = (RSAPublicKey) o; 149 return modulus.equals(other.getModulus()) 150 && publicExponent.equals(other.getPublicExponent()); 151 } 152 153 @Override hashCode()154 public int hashCode() { 155 ensureReadParams(); 156 157 return modulus.hashCode() ^ publicExponent.hashCode(); 158 } 159 160 @Override toString()161 public String toString() { 162 ensureReadParams(); 163 164 final StringBuilder sb = new StringBuilder("OpenSSLRSAPublicKey{"); 165 sb.append("modulus="); 166 sb.append(modulus.toString(16)); 167 sb.append(','); 168 sb.append("publicExponent="); 169 sb.append(publicExponent.toString(16)); 170 sb.append('}'); 171 172 return sb.toString(); 173 } 174 readObject(ObjectInputStream stream)175 private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { 176 stream.defaultReadObject(); 177 178 key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA( 179 modulus.toByteArray(), 180 publicExponent.toByteArray(), 181 null, 182 null, 183 null, 184 null, 185 null, 186 null)); 187 fetchedParams = true; 188 } 189 writeObject(ObjectOutputStream stream)190 private void writeObject(ObjectOutputStream stream) throws IOException { 191 ensureReadParams(); 192 stream.defaultWriteObject(); 193 } 194 } 195