CertBlacklist.java revision 2a64eecc02ffb5b991fb5c367eab777b1325eef8
1effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch/* 2effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * Copyright (C) 2012 The Android Open Source Project 3effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * 4effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * Licensed under the Apache License, Version 2.0 (the "License"); 5effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * you may not use this file except in compliance with the License. 6effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * You may obtain a copy of the License at 7effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * 80529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch * http://www.apache.org/licenses/LICENSE-2.0 9effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * 10effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * Unless required by applicable law or agreed to in writing, software 11effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * distributed under the License is distributed on an "AS IS" BASIS, 12effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * See the License for the specific language governing permissions and 14effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch * limitations under the License. 15effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch */ 16effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 17effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochpackage org.bouncycastle.jce.provider; 18effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 19effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.io.Closeable; 20effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.io.ByteArrayOutputStream; 21effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.io.FileNotFoundException; 22effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.io.IOException; 23effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.io.RandomAccessFile; 24effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.math.BigInteger; 25effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.security.PublicKey; 26effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.util.Arrays; 27effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.util.Collections; 28effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.util.HashSet; 29effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.util.Set; 30effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.util.logging.Level; 31effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport java.util.logging.Logger; 32effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport org.bouncycastle.crypto.Digest; 33effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport org.bouncycastle.crypto.digests.AndroidDigestFactory; 34effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochimport org.bouncycastle.util.encoders.Hex; 35effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 36effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochpublic class CertBlacklist { 37effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch private static final Logger logger = Logger.getLogger(CertBlacklist.class.getName()); 38effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 39effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch // public for testing 40effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch public final Set<BigInteger> serialBlacklist; 41effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch public final Set<byte[]> pubkeyBlacklist; 42effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 43effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch public CertBlacklist() { 44effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch String androidData = System.getenv("ANDROID_DATA"); 45 String blacklistRoot = androidData + "/misc/keychain/"; 46 String defaultPubkeyBlacklistPath = blacklistRoot + "pubkey_blacklist.txt"; 47 String defaultSerialBlacklistPath = blacklistRoot + "serial_blacklist.txt"; 48 49 pubkeyBlacklist = readPublicKeyBlackList(defaultPubkeyBlacklistPath); 50 serialBlacklist = readSerialBlackList(defaultSerialBlacklistPath); 51 } 52 53 /** Test only interface, not for public use */ 54 public CertBlacklist(String pubkeyBlacklistPath, String serialBlacklistPath) { 55 pubkeyBlacklist = readPublicKeyBlackList(pubkeyBlacklistPath); 56 serialBlacklist = readSerialBlackList(serialBlacklistPath); 57 } 58 59 private static boolean isHex(String value) { 60 try { 61 new BigInteger(value, 16); 62 return true; 63 } catch (NumberFormatException e) { 64 logger.log(Level.WARNING, "Could not parse hex value " + value, e); 65 return false; 66 } 67 } 68 69 private static boolean isPubkeyHash(String value) { 70 if (value.length() != 40) { 71 logger.log(Level.WARNING, "Invalid pubkey hash length: " + value.length()); 72 return false; 73 } 74 return isHex(value); 75 } 76 77 private static String readBlacklist(String path) { 78 try { 79 return readFileAsString(path); 80 } catch (FileNotFoundException ignored) { 81 } catch (IOException e) { 82 logger.log(Level.WARNING, "Could not read blacklist", e); 83 } 84 return ""; 85 } 86 87 // From IoUtils.readFileAsString 88 private static String readFileAsString(String path) throws IOException { 89 return readFileAsBytes(path).toString("UTF-8"); 90 } 91 92 // Based on IoUtils.readFileAsBytes 93 private static ByteArrayOutputStream readFileAsBytes(String path) throws IOException { 94 RandomAccessFile f = null; 95 try { 96 f = new RandomAccessFile(path, "r"); 97 ByteArrayOutputStream bytes = new ByteArrayOutputStream((int) f.length()); 98 byte[] buffer = new byte[8192]; 99 while (true) { 100 int byteCount = f.read(buffer); 101 if (byteCount == -1) { 102 return bytes; 103 } 104 bytes.write(buffer, 0, byteCount); 105 } 106 } finally { 107 closeQuietly(f); 108 } 109 } 110 111 // Base on IoUtils.closeQuietly 112 private static void closeQuietly(Closeable closeable) { 113 if (closeable != null) { 114 try { 115 closeable.close(); 116 } catch (RuntimeException rethrown) { 117 throw rethrown; 118 } catch (Exception ignored) { 119 } 120 } 121 } 122 123 private static final Set<BigInteger> readSerialBlackList(String path) { 124 125 // start out with a base set of known bad values 126 Set<BigInteger> bl = new HashSet<BigInteger>(Arrays.asList( 127 // From http://src.chromium.org/viewvc/chrome/trunk/src/net/base/x509_certificate.cc?revision=78748&view=markup 128 // Not a real certificate. For testing only. 129 new BigInteger("077a59bcd53459601ca6907267a6dd1c", 16), 130 new BigInteger("047ecbe9fca55f7bd09eae36e10cae1e", 16), 131 new BigInteger("d8f35f4eb7872b2dab0692e315382fb0", 16), 132 new BigInteger("b0b7133ed096f9b56fae91c874bd3ac0", 16), 133 new BigInteger("9239d5348f40d1695a745470e1f23f43", 16), 134 new BigInteger("e9028b9578e415dc1a710a2b88154447", 16), 135 new BigInteger("d7558fdaf5f1105bb213282b707729a3", 16), 136 new BigInteger("f5c86af36162f13a64f54f6dc9587c06", 16), 137 new BigInteger("392a434f0e07df1f8aa305de34e0c229", 16), 138 new BigInteger("3e75ced46b693021218830ae86a82a71", 16), 139 new BigInteger("864", 16), 140 new BigInteger("827", 16), 141 new BigInteger("31da7", 16) 142 )); 143 144 // attempt to augment it with values taken from gservices 145 String serialBlacklist = readBlacklist(path); 146 if (!serialBlacklist.equals("")) { 147 for(String value : serialBlacklist.split(",")) { 148 try { 149 bl.add(new BigInteger(value, 16)); 150 } catch (NumberFormatException e) { 151 logger.log(Level.WARNING, "Tried to blacklist invalid serial number " + value, e); 152 } 153 } 154 } 155 156 // whether that succeeds or fails, send it on its merry way 157 return Collections.unmodifiableSet(bl); 158 } 159 160 private static final Set<byte[]> readPublicKeyBlackList(String path) { 161 162 // start out with a base set of known bad values 163 Set<byte[]> bl = new HashSet<byte[]>(Arrays.asList( 164 // From http://src.chromium.org/viewvc/chrome/branches/782/src/net/base/x509_certificate.cc?r1=98750&r2=98749&pathrev=98750 165 // C=NL, O=DigiNotar, CN=DigiNotar Root CA/emailAddress=info@diginotar.nl 166 "410f36363258f30b347d12ce4863e433437806a8".getBytes(), 167 // Subject: CN=DigiNotar Cyber CA 168 // Issuer: CN=GTE CyberTrust Global Root 169 "ba3e7bd38cd7e1e6b9cd4c219962e59d7a2f4e37".getBytes(), 170 // Subject: CN=DigiNotar Services 1024 CA 171 // Issuer: CN=Entrust.net 172 "e23b8d105f87710a68d9248050ebefc627be4ca6".getBytes(), 173 // Subject: CN=DigiNotar PKIoverheid CA Organisatie - G2 174 // Issuer: CN=Staat der Nederlanden Organisatie CA - G2 175 "7b2e16bc39bcd72b456e9f055d1de615b74945db".getBytes(), 176 // Subject: CN=DigiNotar PKIoverheid CA Overheid en Bedrijven 177 // Issuer: CN=Staat der Nederlanden Overheid CA 178 "e8f91200c65cee16e039b9f883841661635f81c5".getBytes(), 179 // From http://src.chromium.org/viewvc/chrome?view=rev&revision=108479 180 // Subject: O=Digicert Sdn. Bhd. 181 // Issuer: CN=GTE CyberTrust Global Root 182 "0129bcd5b448ae8d2496d1c3e19723919088e152".getBytes(), 183 // Subject: CN=e-islem.kktcmerkezbankasi.org/emailAddress=ileti@kktcmerkezbankasi.org 184 // Issuer: CN=T\xC3\x9CRKTRUST Elektronik Sunucu Sertifikas\xC4\xB1 Hizmetleri 185 "5f3ab33d55007054bc5e3e5553cd8d8465d77c61".getBytes(), 186 // Subject: CN=*.EGO.GOV.TR 93 187 // Issuer: CN=T\xC3\x9CRKTRUST Elektronik Sunucu Sertifikas\xC4\xB1 Hizmetleri 188 "783333c9687df63377efceddd82efa9101913e8e".getBytes(), 189 // Subject: Subject: C=FR, O=DG Tr\xC3\xA9sor, CN=AC DG Tr\xC3\xA9sor SSL 190 // Issuer: C=FR, O=DGTPE, CN=AC DGTPE Signature Authentification 191 "3ecf4bbbe46096d514bb539bb913d77aa4ef31bf".getBytes() 192 )); 193 194 // attempt to augment it with values taken from gservices 195 String pubkeyBlacklist = readBlacklist(path); 196 if (!pubkeyBlacklist.equals("")) { 197 for (String value : pubkeyBlacklist.split(",")) { 198 value = value.trim(); 199 if (isPubkeyHash(value)) { 200 bl.add(value.getBytes()); 201 } else { 202 logger.log(Level.WARNING, "Tried to blacklist invalid pubkey " + value); 203 } 204 } 205 } 206 207 return bl; 208 } 209 210 public boolean isPublicKeyBlackListed(PublicKey publicKey) { 211 byte[] encoded = publicKey.getEncoded(); 212 Digest digest = AndroidDigestFactory.getSHA1(); 213 digest.update(encoded, 0, encoded.length); 214 byte[] out = new byte[digest.getDigestSize()]; 215 digest.doFinal(out, 0); 216 for (byte[] blacklisted : pubkeyBlacklist) { 217 if (Arrays.equals(blacklisted, Hex.encode(out))) { 218 return true; 219 } 220 } 221 return false; 222 } 223 224 public boolean isSerialNumberBlackListed(BigInteger serial) { 225 return serialBlacklist.contains(serial); 226 } 227 228} 229