diff options
Diffstat (limited to 'repackaged/bcprov/src/main/java/com/android/org/bouncycastle/jce/provider/CertBlocklist.java')
-rw-r--r-- | repackaged/bcprov/src/main/java/com/android/org/bouncycastle/jce/provider/CertBlocklist.java | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/repackaged/bcprov/src/main/java/com/android/org/bouncycastle/jce/provider/CertBlocklist.java b/repackaged/bcprov/src/main/java/com/android/org/bouncycastle/jce/provider/CertBlocklist.java new file mode 100644 index 00000000..a7689e08 --- /dev/null +++ b/repackaged/bcprov/src/main/java/com/android/org/bouncycastle/jce/provider/CertBlocklist.java @@ -0,0 +1,238 @@ +/* GENERATED SOURCE. DO NOT MODIFY. */ +/* + * 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 com.android.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 com.android.org.bouncycastle.crypto.Digest; +import com.android.org.bouncycastle.crypto.digests.AndroidDigestFactory; +import com.android.org.bouncycastle.util.encoders.Hex; + +/** + * @hide This class is not part of the Android public SDK API + */ +public class CertBlocklist { + private static final Logger logger = Logger.getLogger(CertBlocklist.class.getName()); + + // public for testing + public final Set<BigInteger> serialBlocklist; + public final Set<byte[]> pubkeyBlocklist; + + public CertBlocklist() { + String androidData = System.getenv("ANDROID_DATA"); + String blocklistRoot = androidData + "/misc/keychain/"; + // TODO(b/162575432): change these paths to use inclusive language + String defaultPubkeyBlocklistPath = blocklistRoot + "pubkey_blacklist.txt"; + String defaultSerialBlocklistPath = blocklistRoot + "serial_blacklist.txt"; + + pubkeyBlocklist = readPublicKeyBlockList(defaultPubkeyBlocklistPath); + serialBlocklist = readSerialBlockList(defaultSerialBlocklistPath); + } + + /** Test only interface, not for public use */ + public CertBlocklist(String pubkeyBlocklistPath, String serialBlocklistPath) { + pubkeyBlocklist = readPublicKeyBlockList(pubkeyBlocklistPath); + serialBlocklist = readSerialBlockList(serialBlocklistPath); + } + + 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 readBlocklist(String path) { + try { + return readFileAsString(path); + } catch (FileNotFoundException ignored) { + } catch (IOException e) { + logger.log(Level.WARNING, "Could not read blocklist", 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 Set<BigInteger> readSerialBlockList(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 serialBlocklist = readBlocklist(path); + if (!serialBlocklist.equals("")) { + for(String value : serialBlocklist.split(",")) { + try { + bl.add(new BigInteger(value, 16)); + } catch (NumberFormatException e) { + logger.log(Level.WARNING, "Tried to blocklist invalid serial number " + value, e); + } + } + } + + // whether that succeeds or fails, send it on its merry way + return Collections.unmodifiableSet(bl); + } + + private static Set<byte[]> readPublicKeyBlockList(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 pubkeyBlocklist = readBlocklist(path); + if (!pubkeyBlocklist.equals("")) { + for (String value : pubkeyBlocklist.split(",")) { + value = value.trim(); + if (isPubkeyHash(value)) { + bl.add(value.getBytes()); + } else { + logger.log(Level.WARNING, "Tried to blocklist invalid pubkey " + value); + } + } + } + + return bl; + } + + public boolean isPublicKeyBlockListed(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[] blocklisted : pubkeyBlocklist) { + if (Arrays.equals(blocklisted, Hex.encode(out))) { + return true; + } + } + return false; + } + + public boolean isSerialNumberBlockListed(BigInteger serial) { + return serialBlocklist.contains(serial); + } + +} |