| /* |
| * Copyright (C) 2012 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 org.bouncycastle.jce.provider; |
| |
| import java.io.Closeable; |
| import java.io.ByteArrayOutputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.math.BigInteger; |
| import java.security.PublicKey; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| import org.bouncycastle.crypto.Digest; |
| import org.bouncycastle.crypto.digests.AndroidDigestFactory; |
| import org.bouncycastle.util.encoders.Hex; |
| |
| public class CertBlacklist { |
| private static final Logger logger = Logger.getLogger(CertBlacklist.class.getName()); |
| |
| // public for testing |
| public final Set<BigInteger> serialBlacklist; |
| public final Set<byte[]> pubkeyBlacklist; |
| |
| public CertBlacklist() { |
| String androidData = System.getenv("ANDROID_DATA"); |
| String blacklistRoot = androidData + "/misc/keychain/"; |
| String defaultPubkeyBlacklistPath = blacklistRoot + "pubkey_blacklist.txt"; |
| String defaultSerialBlacklistPath = blacklistRoot + "serial_blacklist.txt"; |
| |
| pubkeyBlacklist = readPublicKeyBlackList(defaultPubkeyBlacklistPath); |
| serialBlacklist = readSerialBlackList(defaultSerialBlacklistPath); |
| } |
| |
| /** Test only interface, not for public use */ |
| public CertBlacklist(String pubkeyBlacklistPath, String serialBlacklistPath) { |
| pubkeyBlacklist = readPublicKeyBlackList(pubkeyBlacklistPath); |
| serialBlacklist = readSerialBlackList(serialBlacklistPath); |
| } |
| |
| private static boolean isHex(String value) { |
| try { |
| new BigInteger(value, 16); |
| return true; |
| } catch (NumberFormatException e) { |
| logger.log(Level.WARNING, "Could not parse hex value " + value, e); |
| return false; |
| } |
| } |
| |
| private static boolean isPubkeyHash(String value) { |
| if (value.length() != 40) { |
| logger.log(Level.WARNING, "Invalid pubkey hash length: " + value.length()); |
| return false; |
| } |
| return isHex(value); |
| } |
| |
| private static String readBlacklist(String path) { |
| try { |
| return readFileAsString(path); |
| } catch (FileNotFoundException ignored) { |
| } catch (IOException e) { |
| logger.log(Level.WARNING, "Could not read blacklist", e); |
| } |
| return ""; |
| } |
| |
| // From IoUtils.readFileAsString |
| private static String readFileAsString(String path) throws IOException { |
| return readFileAsBytes(path).toString("UTF-8"); |
| } |
| |
| // Based on IoUtils.readFileAsBytes |
| private static ByteArrayOutputStream readFileAsBytes(String path) throws IOException { |
| RandomAccessFile f = null; |
| try { |
| f = new RandomAccessFile(path, "r"); |
| ByteArrayOutputStream bytes = new ByteArrayOutputStream((int) f.length()); |
| byte[] buffer = new byte[8192]; |
| while (true) { |
| int byteCount = f.read(buffer); |
| if (byteCount == -1) { |
| return bytes; |
| } |
| bytes.write(buffer, 0, byteCount); |
| } |
| } finally { |
| closeQuietly(f); |
| } |
| } |
| |
| // Base on IoUtils.closeQuietly |
| private static void closeQuietly(Closeable closeable) { |
| if (closeable != null) { |
| try { |
| closeable.close(); |
| } catch (RuntimeException rethrown) { |
| throw rethrown; |
| } catch (Exception ignored) { |
| } |
| } |
| } |
| |
| private static final Set<BigInteger> readSerialBlackList(String path) { |
| |
| /* Start out with a base set of known bad values. |
| * |
| * WARNING: Do not add short serials to this list! |
| * |
| * Since this currently doesn't compare the serial + issuer, you |
| * should only add serials that have enough entropy here. Short |
| * serials may inadvertently match a certificate that was issued |
| * not in compliance with the Baseline Requirements. |
| */ |
| Set<BigInteger> bl = new HashSet<BigInteger>(Arrays.asList( |
| // From http://src.chromium.org/viewvc/chrome/trunk/src/net/base/x509_certificate.cc?revision=78748&view=markup |
| // Not a real certificate. For testing only. |
| new BigInteger("077a59bcd53459601ca6907267a6dd1c", 16), |
| new BigInteger("047ecbe9fca55f7bd09eae36e10cae1e", 16), |
| new BigInteger("d8f35f4eb7872b2dab0692e315382fb0", 16), |
| new BigInteger("b0b7133ed096f9b56fae91c874bd3ac0", 16), |
| new BigInteger("9239d5348f40d1695a745470e1f23f43", 16), |
| new BigInteger("e9028b9578e415dc1a710a2b88154447", 16), |
| new BigInteger("d7558fdaf5f1105bb213282b707729a3", 16), |
| new BigInteger("f5c86af36162f13a64f54f6dc9587c06", 16), |
| new BigInteger("392a434f0e07df1f8aa305de34e0c229", 16), |
| new BigInteger("3e75ced46b693021218830ae86a82a71", 16) |
| )); |
| |
| // attempt to augment it with values taken from gservices |
| String serialBlacklist = readBlacklist(path); |
| if (!serialBlacklist.equals("")) { |
| for(String value : serialBlacklist.split(",")) { |
| try { |
| bl.add(new BigInteger(value, 16)); |
| } catch (NumberFormatException e) { |
| logger.log(Level.WARNING, "Tried to blacklist invalid serial number " + value, e); |
| } |
| } |
| } |
| |
| // whether that succeeds or fails, send it on its merry way |
| return Collections.unmodifiableSet(bl); |
| } |
| |
| private static final Set<byte[]> readPublicKeyBlackList(String path) { |
| |
| // start out with a base set of known bad values |
| Set<byte[]> bl = new HashSet<byte[]>(Arrays.asList( |
| // From http://src.chromium.org/viewvc/chrome/branches/782/src/net/base/x509_certificate.cc?r1=98750&r2=98749&pathrev=98750 |
| // C=NL, O=DigiNotar, CN=DigiNotar Root CA/emailAddress=info@diginotar.nl |
| "410f36363258f30b347d12ce4863e433437806a8".getBytes(), |
| // Subject: CN=DigiNotar Cyber CA |
| // Issuer: CN=GTE CyberTrust Global Root |
| "ba3e7bd38cd7e1e6b9cd4c219962e59d7a2f4e37".getBytes(), |
| // Subject: CN=DigiNotar Services 1024 CA |
| // Issuer: CN=Entrust.net |
| "e23b8d105f87710a68d9248050ebefc627be4ca6".getBytes(), |
| // Subject: CN=DigiNotar PKIoverheid CA Organisatie - G2 |
| // Issuer: CN=Staat der Nederlanden Organisatie CA - G2 |
| "7b2e16bc39bcd72b456e9f055d1de615b74945db".getBytes(), |
| // Subject: CN=DigiNotar PKIoverheid CA Overheid en Bedrijven |
| // Issuer: CN=Staat der Nederlanden Overheid CA |
| "e8f91200c65cee16e039b9f883841661635f81c5".getBytes(), |
| // From http://src.chromium.org/viewvc/chrome?view=rev&revision=108479 |
| // Subject: O=Digicert Sdn. Bhd. |
| // Issuer: CN=GTE CyberTrust Global Root |
| "0129bcd5b448ae8d2496d1c3e19723919088e152".getBytes(), |
| // Subject: CN=e-islem.kktcmerkezbankasi.org/emailAddress=ileti@kktcmerkezbankasi.org |
| // Issuer: CN=T\xC3\x9CRKTRUST Elektronik Sunucu Sertifikas\xC4\xB1 Hizmetleri |
| "5f3ab33d55007054bc5e3e5553cd8d8465d77c61".getBytes(), |
| // Subject: CN=*.EGO.GOV.TR 93 |
| // Issuer: CN=T\xC3\x9CRKTRUST Elektronik Sunucu Sertifikas\xC4\xB1 Hizmetleri |
| "783333c9687df63377efceddd82efa9101913e8e".getBytes(), |
| // Subject: Subject: C=FR, O=DG Tr\xC3\xA9sor, CN=AC DG Tr\xC3\xA9sor SSL |
| // Issuer: C=FR, O=DGTPE, CN=AC DGTPE Signature Authentification |
| "3ecf4bbbe46096d514bb539bb913d77aa4ef31bf".getBytes() |
| )); |
| |
| // attempt to augment it with values taken from gservices |
| String pubkeyBlacklist = readBlacklist(path); |
| if (!pubkeyBlacklist.equals("")) { |
| for (String value : pubkeyBlacklist.split(",")) { |
| value = value.trim(); |
| if (isPubkeyHash(value)) { |
| bl.add(value.getBytes()); |
| } else { |
| logger.log(Level.WARNING, "Tried to blacklist invalid pubkey " + value); |
| } |
| } |
| } |
| |
| return bl; |
| } |
| |
| public boolean isPublicKeyBlackListed(PublicKey publicKey) { |
| byte[] encoded = publicKey.getEncoded(); |
| Digest digest = AndroidDigestFactory.getSHA1(); |
| digest.update(encoded, 0, encoded.length); |
| byte[] out = new byte[digest.getDigestSize()]; |
| digest.doFinal(out, 0); |
| for (byte[] blacklisted : pubkeyBlacklist) { |
| if (Arrays.equals(blacklisted, Hex.encode(out))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public boolean isSerialNumberBlackListed(BigInteger serial) { |
| return serialBlacklist.contains(serial); |
| } |
| |
| } |