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 * @hide 33 */ 34 @Internal 35 public class OpenSSLRSAPublicKey implements RSAPublicKey, OpenSSLKeyHolder { 36 private static final long serialVersionUID = 123125005824688292L; 37 38 private transient OpenSSLKey key; 39 40 private BigInteger publicExponent; 41 42 private BigInteger modulus; 43 44 private transient boolean fetchedParams; 45 OpenSSLRSAPublicKey(OpenSSLKey key)46 OpenSSLRSAPublicKey(OpenSSLKey key) { 47 this.key = key; 48 } 49 50 @Override getOpenSSLKey()51 public OpenSSLKey getOpenSSLKey() { 52 return key; 53 } 54 OpenSSLRSAPublicKey(RSAPublicKeySpec spec)55 OpenSSLRSAPublicKey(RSAPublicKeySpec spec) throws InvalidKeySpecException { 56 try { 57 key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA( 58 spec.getModulus().toByteArray(), 59 spec.getPublicExponent().toByteArray(), 60 null, 61 null, 62 null, 63 null, 64 null, 65 null)); 66 } catch (Exception e) { 67 throw new InvalidKeySpecException(e); 68 } 69 } 70 getInstance(RSAPublicKey rsaPublicKey)71 static OpenSSLKey getInstance(RSAPublicKey rsaPublicKey) throws InvalidKeyException { 72 try { 73 return new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA( 74 rsaPublicKey.getModulus().toByteArray(), 75 rsaPublicKey.getPublicExponent().toByteArray(), 76 null, 77 null, 78 null, 79 null, 80 null, 81 null)); 82 } catch (Exception e) { 83 throw new InvalidKeyException(e); 84 } 85 } 86 87 @Override getAlgorithm()88 public String getAlgorithm() { 89 return "RSA"; 90 } 91 92 @Override getFormat()93 public String getFormat() { 94 return "X.509"; 95 } 96 97 @Override getEncoded()98 public byte[] getEncoded() { 99 return NativeCrypto.EVP_marshal_public_key(key.getNativeRef()); 100 } 101 ensureReadParams()102 private void ensureReadParams() { 103 if (fetchedParams) { 104 return; 105 } 106 107 byte[][] params = NativeCrypto.get_RSA_public_params(key.getNativeRef()); 108 modulus = new BigInteger(params[0]); 109 publicExponent = new BigInteger(params[1]); 110 111 fetchedParams = true; 112 } 113 114 @Override getModulus()115 public BigInteger getModulus() { 116 ensureReadParams(); 117 return modulus; 118 } 119 120 @Override getPublicExponent()121 public BigInteger getPublicExponent() { 122 ensureReadParams(); 123 return publicExponent; 124 } 125 126 @Override equals(Object o)127 public boolean equals(Object o) { 128 if (o == this) { 129 return true; 130 } 131 132 if (o instanceof OpenSSLRSAPublicKey) { 133 OpenSSLRSAPublicKey other = (OpenSSLRSAPublicKey) o; 134 135 /* 136 * We can shortcut the true case, but it still may be equivalent but 137 * different copies. 138 */ 139 if (key.equals(other.getOpenSSLKey())) { 140 return true; 141 } 142 } 143 144 if (!(o instanceof RSAPublicKey)) { 145 return false; 146 } 147 148 ensureReadParams(); 149 150 RSAPublicKey other = (RSAPublicKey) o; 151 return modulus.equals(other.getModulus()) 152 && publicExponent.equals(other.getPublicExponent()); 153 } 154 155 @Override hashCode()156 public int hashCode() { 157 ensureReadParams(); 158 159 return modulus.hashCode() ^ publicExponent.hashCode(); 160 } 161 162 @Override toString()163 public String toString() { 164 ensureReadParams(); 165 166 final StringBuilder sb = new StringBuilder("OpenSSLRSAPublicKey{"); 167 sb.append("modulus="); 168 sb.append(modulus.toString(16)); 169 sb.append(','); 170 sb.append("publicExponent="); 171 sb.append(publicExponent.toString(16)); 172 sb.append('}'); 173 174 return sb.toString(); 175 } 176 readObject(ObjectInputStream stream)177 private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { 178 stream.defaultReadObject(); 179 180 key = new OpenSSLKey(NativeCrypto.EVP_PKEY_new_RSA( 181 modulus.toByteArray(), 182 publicExponent.toByteArray(), 183 null, 184 null, 185 null, 186 null, 187 null, 188 null)); 189 fetchedParams = true; 190 } 191 writeObject(ObjectOutputStream stream)192 private void writeObject(ObjectOutputStream stream) throws IOException { 193 ensureReadParams(); 194 stream.defaultWriteObject(); 195 } 196 } 197