Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 android.util.apk; |
| 18 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 19 | import android.system.ErrnoException; |
| 20 | import android.system.OsConstants; |
| 21 | import android.util.ArrayMap; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 22 | import android.util.Pair; |
| 23 | |
| 24 | import java.io.ByteArrayInputStream; |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 25 | import java.io.FileDescriptor; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 26 | import java.io.IOException; |
| 27 | import java.io.RandomAccessFile; |
| 28 | import java.math.BigInteger; |
| 29 | import java.nio.BufferUnderflowException; |
| 30 | import java.nio.ByteBuffer; |
| 31 | import java.nio.ByteOrder; |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 32 | import java.nio.DirectByteBuffer; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 33 | import java.security.DigestException; |
| 34 | import java.security.InvalidAlgorithmParameterException; |
| 35 | import java.security.InvalidKeyException; |
| 36 | import java.security.KeyFactory; |
| 37 | import java.security.MessageDigest; |
| 38 | import java.security.NoSuchAlgorithmException; |
| 39 | import java.security.NoSuchProviderException; |
| 40 | import java.security.Principal; |
| 41 | import java.security.PublicKey; |
| 42 | import java.security.Signature; |
| 43 | import java.security.SignatureException; |
| 44 | import java.security.cert.CertificateEncodingException; |
| 45 | import java.security.cert.CertificateException; |
| 46 | import java.security.cert.CertificateExpiredException; |
| 47 | import java.security.cert.CertificateFactory; |
| 48 | import java.security.cert.CertificateNotYetValidException; |
| 49 | import java.security.cert.X509Certificate; |
| 50 | import java.security.spec.AlgorithmParameterSpec; |
| 51 | import java.security.spec.InvalidKeySpecException; |
| 52 | import java.security.spec.MGF1ParameterSpec; |
| 53 | import java.security.spec.PSSParameterSpec; |
| 54 | import java.security.spec.X509EncodedKeySpec; |
| 55 | import java.util.ArrayList; |
| 56 | import java.util.Arrays; |
| 57 | import java.util.Date; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 58 | import java.util.List; |
| 59 | import java.util.Map; |
| 60 | import java.util.Set; |
| 61 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 62 | import libcore.io.Libcore; |
| 63 | import libcore.io.Os; |
| 64 | |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 65 | /** |
| 66 | * APK Signature Scheme v2 verifier. |
| 67 | * |
| 68 | * @hide for internal use only. |
| 69 | */ |
| 70 | public class ApkSignatureSchemeV2Verifier { |
| 71 | |
| 72 | /** |
| 73 | * {@code .SF} file header section attribute indicating that the APK is signed not just with |
| 74 | * JAR signature scheme but also with APK Signature Scheme v2 or newer. This attribute |
| 75 | * facilitates v2 signature stripping detection. |
| 76 | * |
| 77 | * <p>The attribute contains a comma-separated set of signature scheme IDs. |
| 78 | */ |
| 79 | public static final String SF_ATTRIBUTE_ANDROID_APK_SIGNED_NAME = "X-Android-APK-Signed"; |
Alex Klyubin | 3a0095f | 2016-02-16 12:37:17 -0800 | [diff] [blame] | 80 | public static final int SF_ATTRIBUTE_ANDROID_APK_SIGNED_ID = 2; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 81 | |
| 82 | /** |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 83 | * Returns {@code true} if the provided APK contains an APK Signature Scheme V2 signature. |
| 84 | * |
| 85 | * <p><b>NOTE: This method does not verify the signature.</b> |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 86 | */ |
| 87 | public static boolean hasSignature(String apkFile) throws IOException { |
| 88 | try (RandomAccessFile apk = new RandomAccessFile(apkFile, "r")) { |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 89 | findSignature(apk); |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 90 | return true; |
| 91 | } catch (SignatureNotFoundException e) { |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 92 | return false; |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 93 | } |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /** |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 97 | * Verifies APK Signature Scheme v2 signatures of the provided APK and returns the certificates |
| 98 | * associated with each signer. |
| 99 | * |
| 100 | * @throws SignatureNotFoundException if the APK is not signed using APK Signature Scheme v2. |
| 101 | * @throws SecurityException if a APK Signature Scheme v2 signature of this APK does not verify. |
| 102 | * @throws IOException if an I/O error occurs while reading the APK file. |
| 103 | */ |
| 104 | public static X509Certificate[][] verify(String apkFile) |
| 105 | throws SignatureNotFoundException, SecurityException, IOException { |
| 106 | try (RandomAccessFile apk = new RandomAccessFile(apkFile, "r")) { |
| 107 | return verify(apk); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Verifies APK Signature Scheme v2 signatures of the provided APK and returns the certificates |
| 113 | * associated with each signer. |
| 114 | * |
| 115 | * @throws SignatureNotFoundException if the APK is not signed using APK Signature Scheme v2. |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 116 | * @throws SecurityException if an APK Signature Scheme v2 signature of this APK does not |
| 117 | * verify. |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 118 | * @throws IOException if an I/O error occurs while reading the APK file. |
| 119 | */ |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 120 | private static X509Certificate[][] verify(RandomAccessFile apk) |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 121 | throws SignatureNotFoundException, SecurityException, IOException { |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 122 | SignatureInfo signatureInfo = findSignature(apk); |
| 123 | return verify(apk.getFD(), signatureInfo); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /** |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 127 | * APK Signature Scheme v2 block and additional information relevant to verifying the signatures |
| 128 | * contained in the block against the file. |
| 129 | */ |
| 130 | private static class SignatureInfo { |
| 131 | /** Contents of APK Signature Scheme v2 block. */ |
| 132 | private final ByteBuffer signatureBlock; |
| 133 | |
| 134 | /** Position of the APK Signing Block in the file. */ |
| 135 | private final long apkSigningBlockOffset; |
| 136 | |
| 137 | /** Position of the ZIP Central Directory in the file. */ |
| 138 | private final long centralDirOffset; |
| 139 | |
| 140 | /** Position of the ZIP End of Central Directory (EoCD) in the file. */ |
| 141 | private final long eocdOffset; |
| 142 | |
| 143 | /** Contents of ZIP End of Central Directory (EoCD) of the file. */ |
| 144 | private final ByteBuffer eocd; |
| 145 | |
| 146 | private SignatureInfo( |
| 147 | ByteBuffer signatureBlock, |
| 148 | long apkSigningBlockOffset, |
| 149 | long centralDirOffset, |
| 150 | long eocdOffset, |
| 151 | ByteBuffer eocd) { |
| 152 | this.signatureBlock = signatureBlock; |
| 153 | this.apkSigningBlockOffset = apkSigningBlockOffset; |
| 154 | this.centralDirOffset = centralDirOffset; |
| 155 | this.eocdOffset = eocdOffset; |
| 156 | this.eocd = eocd; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Returns the APK Signature Scheme v2 block contained in the provided APK file and the |
| 162 | * additional information relevant for verifying the block against the file. |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 163 | * |
| 164 | * @throws SignatureNotFoundException if the APK is not signed using APK Signature Scheme v2. |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 165 | * @throws IOException if an I/O error occurs while reading the APK file. |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 166 | */ |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 167 | private static SignatureInfo findSignature(RandomAccessFile apk) |
| 168 | throws IOException, SignatureNotFoundException { |
| 169 | // Find the ZIP End of Central Directory (EoCD) record. |
| 170 | Pair<ByteBuffer, Long> eocdAndOffsetInFile = getEocd(apk); |
| 171 | ByteBuffer eocd = eocdAndOffsetInFile.first; |
| 172 | long eocdOffset = eocdAndOffsetInFile.second; |
| 173 | if (ZipUtils.isZip64EndOfCentralDirectoryLocatorPresent(apk, eocdOffset)) { |
| 174 | throw new SignatureNotFoundException("ZIP64 APK not supported"); |
| 175 | } |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 176 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 177 | // Find the APK Signing Block. The block immediately precedes the Central Directory. |
| 178 | long centralDirOffset = getCentralDirOffset(eocd, eocdOffset); |
| 179 | Pair<ByteBuffer, Long> apkSigningBlockAndOffsetInFile = |
| 180 | findApkSigningBlock(apk, centralDirOffset); |
| 181 | ByteBuffer apkSigningBlock = apkSigningBlockAndOffsetInFile.first; |
| 182 | long apkSigningBlockOffset = apkSigningBlockAndOffsetInFile.second; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 183 | |
| 184 | // Find the APK Signature Scheme v2 Block inside the APK Signing Block. |
| 185 | ByteBuffer apkSignatureSchemeV2Block = findApkSignatureSchemeV2Block(apkSigningBlock); |
| 186 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 187 | return new SignatureInfo( |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 188 | apkSignatureSchemeV2Block, |
| 189 | apkSigningBlockOffset, |
| 190 | centralDirOffset, |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 191 | eocdOffset, |
| 192 | eocd); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /** |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 196 | * Verifies the contents of the provided APK file against the provided APK Signature Scheme v2 |
| 197 | * Block. |
| 198 | * |
| 199 | * @param signatureInfo APK Signature Scheme v2 Block and information relevant for verifying it |
| 200 | * against the APK file. |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 201 | */ |
| 202 | private static X509Certificate[][] verify( |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 203 | FileDescriptor apkFileDescriptor, |
| 204 | SignatureInfo signatureInfo) throws SecurityException { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 205 | int signerCount = 0; |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 206 | Map<Integer, byte[]> contentDigests = new ArrayMap<>(); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 207 | List<X509Certificate[]> signerCerts = new ArrayList<>(); |
| 208 | CertificateFactory certFactory; |
| 209 | try { |
| 210 | certFactory = CertificateFactory.getInstance("X.509"); |
| 211 | } catch (CertificateException e) { |
| 212 | throw new RuntimeException("Failed to obtain X.509 CertificateFactory", e); |
| 213 | } |
| 214 | ByteBuffer signers; |
| 215 | try { |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 216 | signers = getLengthPrefixedSlice(signatureInfo.signatureBlock); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 217 | } catch (IOException e) { |
| 218 | throw new SecurityException("Failed to read list of signers", e); |
| 219 | } |
| 220 | while (signers.hasRemaining()) { |
| 221 | signerCount++; |
| 222 | try { |
| 223 | ByteBuffer signer = getLengthPrefixedSlice(signers); |
| 224 | X509Certificate[] certs = verifySigner(signer, contentDigests, certFactory); |
| 225 | signerCerts.add(certs); |
| 226 | } catch (IOException | BufferUnderflowException | SecurityException e) { |
| 227 | throw new SecurityException( |
| 228 | "Failed to parse/verify signer #" + signerCount + " block", |
| 229 | e); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | if (signerCount < 1) { |
| 234 | throw new SecurityException("No signers found"); |
| 235 | } |
| 236 | |
| 237 | if (contentDigests.isEmpty()) { |
| 238 | throw new SecurityException("No content digests found"); |
| 239 | } |
| 240 | |
| 241 | verifyIntegrity( |
| 242 | contentDigests, |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 243 | apkFileDescriptor, |
| 244 | signatureInfo.apkSigningBlockOffset, |
| 245 | signatureInfo.centralDirOffset, |
| 246 | signatureInfo.eocdOffset, |
| 247 | signatureInfo.eocd); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 248 | |
| 249 | return signerCerts.toArray(new X509Certificate[signerCerts.size()][]); |
| 250 | } |
| 251 | |
| 252 | private static X509Certificate[] verifySigner( |
| 253 | ByteBuffer signerBlock, |
| 254 | Map<Integer, byte[]> contentDigests, |
| 255 | CertificateFactory certFactory) throws SecurityException, IOException { |
| 256 | ByteBuffer signedData = getLengthPrefixedSlice(signerBlock); |
| 257 | ByteBuffer signatures = getLengthPrefixedSlice(signerBlock); |
| 258 | byte[] publicKeyBytes = readLengthPrefixedByteArray(signerBlock); |
| 259 | |
| 260 | int signatureCount = 0; |
| 261 | int bestSigAlgorithm = -1; |
| 262 | byte[] bestSigAlgorithmSignatureBytes = null; |
| 263 | List<Integer> signaturesSigAlgorithms = new ArrayList<>(); |
| 264 | while (signatures.hasRemaining()) { |
| 265 | signatureCount++; |
| 266 | try { |
| 267 | ByteBuffer signature = getLengthPrefixedSlice(signatures); |
| 268 | if (signature.remaining() < 8) { |
| 269 | throw new SecurityException("Signature record too short"); |
| 270 | } |
| 271 | int sigAlgorithm = signature.getInt(); |
| 272 | signaturesSigAlgorithms.add(sigAlgorithm); |
| 273 | if (!isSupportedSignatureAlgorithm(sigAlgorithm)) { |
| 274 | continue; |
| 275 | } |
| 276 | if ((bestSigAlgorithm == -1) |
| 277 | || (compareSignatureAlgorithm(sigAlgorithm, bestSigAlgorithm) > 0)) { |
| 278 | bestSigAlgorithm = sigAlgorithm; |
| 279 | bestSigAlgorithmSignatureBytes = readLengthPrefixedByteArray(signature); |
| 280 | } |
| 281 | } catch (IOException | BufferUnderflowException e) { |
| 282 | throw new SecurityException( |
| 283 | "Failed to parse signature record #" + signatureCount, |
| 284 | e); |
| 285 | } |
| 286 | } |
| 287 | if (bestSigAlgorithm == -1) { |
| 288 | if (signatureCount == 0) { |
| 289 | throw new SecurityException("No signatures found"); |
| 290 | } else { |
| 291 | throw new SecurityException("No supported signatures found"); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | String keyAlgorithm = getSignatureAlgorithmJcaKeyAlgorithm(bestSigAlgorithm); |
| 296 | Pair<String, ? extends AlgorithmParameterSpec> signatureAlgorithmParams = |
| 297 | getSignatureAlgorithmJcaSignatureAlgorithm(bestSigAlgorithm); |
| 298 | String jcaSignatureAlgorithm = signatureAlgorithmParams.first; |
| 299 | AlgorithmParameterSpec jcaSignatureAlgorithmParams = signatureAlgorithmParams.second; |
| 300 | boolean sigVerified; |
| 301 | try { |
| 302 | PublicKey publicKey = |
| 303 | KeyFactory.getInstance(keyAlgorithm) |
| 304 | .generatePublic(new X509EncodedKeySpec(publicKeyBytes)); |
| 305 | Signature sig = Signature.getInstance(jcaSignatureAlgorithm); |
| 306 | sig.initVerify(publicKey); |
| 307 | if (jcaSignatureAlgorithmParams != null) { |
| 308 | sig.setParameter(jcaSignatureAlgorithmParams); |
| 309 | } |
| 310 | sig.update(signedData); |
| 311 | sigVerified = sig.verify(bestSigAlgorithmSignatureBytes); |
| 312 | } catch (NoSuchAlgorithmException | InvalidKeySpecException | InvalidKeyException |
| 313 | | InvalidAlgorithmParameterException | SignatureException e) { |
| 314 | throw new SecurityException( |
| 315 | "Failed to verify " + jcaSignatureAlgorithm + " signature", e); |
| 316 | } |
| 317 | if (!sigVerified) { |
| 318 | throw new SecurityException(jcaSignatureAlgorithm + " signature did not verify"); |
| 319 | } |
| 320 | |
| 321 | // Signature over signedData has verified. |
| 322 | |
| 323 | byte[] contentDigest = null; |
| 324 | signedData.clear(); |
| 325 | ByteBuffer digests = getLengthPrefixedSlice(signedData); |
| 326 | List<Integer> digestsSigAlgorithms = new ArrayList<>(); |
| 327 | int digestCount = 0; |
| 328 | while (digests.hasRemaining()) { |
| 329 | digestCount++; |
| 330 | try { |
| 331 | ByteBuffer digest = getLengthPrefixedSlice(digests); |
| 332 | if (digest.remaining() < 8) { |
| 333 | throw new IOException("Record too short"); |
| 334 | } |
| 335 | int sigAlgorithm = digest.getInt(); |
| 336 | digestsSigAlgorithms.add(sigAlgorithm); |
| 337 | if (sigAlgorithm == bestSigAlgorithm) { |
| 338 | contentDigest = readLengthPrefixedByteArray(digest); |
| 339 | } |
| 340 | } catch (IOException | BufferUnderflowException e) { |
| 341 | throw new IOException("Failed to parse digest record #" + digestCount, e); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | if (!signaturesSigAlgorithms.equals(digestsSigAlgorithms)) { |
| 346 | throw new SecurityException( |
| 347 | "Signature algorithms don't match between digests and signatures records"); |
| 348 | } |
| 349 | int digestAlgorithm = getSignatureAlgorithmContentDigestAlgorithm(bestSigAlgorithm); |
| 350 | byte[] previousSignerDigest = contentDigests.put(digestAlgorithm, contentDigest); |
| 351 | if ((previousSignerDigest != null) |
| 352 | && (!MessageDigest.isEqual(previousSignerDigest, contentDigest))) { |
| 353 | throw new SecurityException( |
| 354 | getContentDigestAlgorithmJcaDigestAlgorithm(digestAlgorithm) |
| 355 | + " contents digest does not match the digest specified by a preceding signer"); |
| 356 | } |
| 357 | |
| 358 | ByteBuffer certificates = getLengthPrefixedSlice(signedData); |
| 359 | List<X509Certificate> certs = new ArrayList<>(); |
| 360 | int certificateCount = 0; |
| 361 | while (certificates.hasRemaining()) { |
| 362 | certificateCount++; |
| 363 | byte[] encodedCert = readLengthPrefixedByteArray(certificates); |
| 364 | X509Certificate certificate; |
| 365 | try { |
| 366 | certificate = (X509Certificate) |
| 367 | certFactory.generateCertificate(new ByteArrayInputStream(encodedCert)); |
| 368 | } catch (CertificateException e) { |
| 369 | throw new SecurityException("Failed to decode certificate #" + certificateCount, e); |
| 370 | } |
| 371 | certificate = new VerbatimX509Certificate(certificate, encodedCert); |
| 372 | certs.add(certificate); |
| 373 | } |
| 374 | |
| 375 | if (certs.isEmpty()) { |
| 376 | throw new SecurityException("No certificates listed"); |
| 377 | } |
| 378 | X509Certificate mainCertificate = certs.get(0); |
| 379 | byte[] certificatePublicKeyBytes = mainCertificate.getPublicKey().getEncoded(); |
| 380 | if (!Arrays.equals(publicKeyBytes, certificatePublicKeyBytes)) { |
| 381 | throw new SecurityException( |
| 382 | "Public key mismatch between certificate and signature record"); |
| 383 | } |
| 384 | |
| 385 | return certs.toArray(new X509Certificate[certs.size()]); |
| 386 | } |
| 387 | |
| 388 | private static void verifyIntegrity( |
| 389 | Map<Integer, byte[]> expectedDigests, |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 390 | FileDescriptor apkFileDescriptor, |
| 391 | long apkSigningBlockOffset, |
| 392 | long centralDirOffset, |
| 393 | long eocdOffset, |
| 394 | ByteBuffer eocdBuf) throws SecurityException { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 395 | |
| 396 | if (expectedDigests.isEmpty()) { |
| 397 | throw new SecurityException("No digests provided"); |
| 398 | } |
| 399 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 400 | // We need to verify the integrity of the following three sections of the file: |
| 401 | // 1. Everything up to the start of the APK Signing Block. |
| 402 | // 2. ZIP Central Directory. |
| 403 | // 3. ZIP End of Central Directory (EoCD). |
| 404 | // Each of these sections is represented as a separate DataSource instance below. |
| 405 | |
| 406 | // To handle large APKs, these sections are read in 1 MB chunks using memory-mapped I/O to |
| 407 | // avoid wasting physical memory. In most APK verification scenarios, the contents of the |
| 408 | // APK are already there in the OS's page cache and thus mmap does not use additional |
| 409 | // physical memory. |
| 410 | DataSource beforeApkSigningBlock = |
| 411 | new MemoryMappedFileDataSource(apkFileDescriptor, 0, apkSigningBlockOffset); |
| 412 | DataSource centralDir = |
| 413 | new MemoryMappedFileDataSource( |
| 414 | apkFileDescriptor, centralDirOffset, eocdOffset - centralDirOffset); |
| 415 | |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 416 | // For the purposes of integrity verification, ZIP End of Central Directory's field Start of |
| 417 | // Central Directory must be considered to point to the offset of the APK Signing Block. |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 418 | eocdBuf = eocdBuf.duplicate(); |
| 419 | eocdBuf.order(ByteOrder.LITTLE_ENDIAN); |
| 420 | ZipUtils.setZipEocdCentralDirectoryOffset(eocdBuf, apkSigningBlockOffset); |
| 421 | DataSource eocd = new ByteBufferDataSource(eocdBuf); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 422 | |
| 423 | int[] digestAlgorithms = new int[expectedDigests.size()]; |
| 424 | int digestAlgorithmCount = 0; |
| 425 | for (int digestAlgorithm : expectedDigests.keySet()) { |
| 426 | digestAlgorithms[digestAlgorithmCount] = digestAlgorithm; |
| 427 | digestAlgorithmCount++; |
| 428 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 429 | byte[][] actualDigests; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 430 | try { |
| 431 | actualDigests = |
| 432 | computeContentDigests( |
| 433 | digestAlgorithms, |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 434 | new DataSource[] {beforeApkSigningBlock, centralDir, eocd}); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 435 | } catch (DigestException e) { |
| 436 | throw new SecurityException("Failed to compute digest(s) of contents", e); |
| 437 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 438 | for (int i = 0; i < digestAlgorithms.length; i++) { |
| 439 | int digestAlgorithm = digestAlgorithms[i]; |
| 440 | byte[] expectedDigest = expectedDigests.get(digestAlgorithm); |
| 441 | byte[] actualDigest = actualDigests[i]; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 442 | if (!MessageDigest.isEqual(expectedDigest, actualDigest)) { |
| 443 | throw new SecurityException( |
| 444 | getContentDigestAlgorithmJcaDigestAlgorithm(digestAlgorithm) |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 445 | + " digest of contents did not verify"); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 446 | } |
| 447 | } |
| 448 | } |
| 449 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 450 | private static byte[][] computeContentDigests( |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 451 | int[] digestAlgorithms, |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 452 | DataSource[] contents) throws DigestException { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 453 | // For each digest algorithm the result is computed as follows: |
| 454 | // 1. Each segment of contents is split into consecutive chunks of 1 MB in size. |
| 455 | // The final chunk will be shorter iff the length of segment is not a multiple of 1 MB. |
| 456 | // No chunks are produced for empty (zero length) segments. |
| 457 | // 2. The digest of each chunk is computed over the concatenation of byte 0xa5, the chunk's |
| 458 | // length in bytes (uint32 little-endian) and the chunk's contents. |
| 459 | // 3. The output digest is computed over the concatenation of the byte 0x5a, the number of |
| 460 | // chunks (uint32 little-endian) and the concatenation of digests of chunks of all |
| 461 | // segments in-order. |
| 462 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 463 | long totalChunkCountLong = 0; |
| 464 | for (DataSource input : contents) { |
| 465 | totalChunkCountLong += getChunkCount(input.size()); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 466 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 467 | if (totalChunkCountLong >= Integer.MAX_VALUE / 1024) { |
| 468 | throw new DigestException("Too many chunks: " + totalChunkCountLong); |
| 469 | } |
| 470 | int totalChunkCount = (int) totalChunkCountLong; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 471 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 472 | byte[][] digestsOfChunks = new byte[digestAlgorithms.length][]; |
| 473 | for (int i = 0; i < digestAlgorithms.length; i++) { |
| 474 | int digestAlgorithm = digestAlgorithms[i]; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 475 | int digestOutputSizeBytes = getContentDigestAlgorithmOutputSizeBytes(digestAlgorithm); |
| 476 | byte[] concatenationOfChunkCountAndChunkDigests = |
| 477 | new byte[5 + totalChunkCount * digestOutputSizeBytes]; |
| 478 | concatenationOfChunkCountAndChunkDigests[0] = 0x5a; |
| 479 | setUnsignedInt32LittleEndian( |
| 480 | totalChunkCount, |
| 481 | concatenationOfChunkCountAndChunkDigests, |
| 482 | 1); |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 483 | digestsOfChunks[i] = concatenationOfChunkCountAndChunkDigests; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | byte[] chunkContentPrefix = new byte[5]; |
| 487 | chunkContentPrefix[0] = (byte) 0xa5; |
| 488 | int chunkIndex = 0; |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 489 | MessageDigest[] mds = new MessageDigest[digestAlgorithms.length]; |
| 490 | for (int i = 0; i < digestAlgorithms.length; i++) { |
| 491 | String jcaAlgorithmName = |
| 492 | getContentDigestAlgorithmJcaDigestAlgorithm(digestAlgorithms[i]); |
| 493 | try { |
| 494 | mds[i] = MessageDigest.getInstance(jcaAlgorithmName); |
| 495 | } catch (NoSuchAlgorithmException e) { |
| 496 | throw new RuntimeException(jcaAlgorithmName + " digest not supported", e); |
| 497 | } |
| 498 | } |
| 499 | // TODO: Compute digests of chunks in parallel when beneficial. This requires some research |
| 500 | // into how to parallelize (if at all) based on the capabilities of the hardware on which |
| 501 | // this code is running and based on the size of input. |
| 502 | int dataSourceIndex = 0; |
| 503 | for (DataSource input : contents) { |
| 504 | long inputOffset = 0; |
| 505 | long inputRemaining = input.size(); |
| 506 | while (inputRemaining > 0) { |
| 507 | int chunkSize = (int) Math.min(inputRemaining, CHUNK_SIZE_BYTES); |
| 508 | setUnsignedInt32LittleEndian(chunkSize, chunkContentPrefix, 1); |
| 509 | for (int i = 0; i < mds.length; i++) { |
| 510 | mds[i].update(chunkContentPrefix); |
| 511 | } |
| 512 | try { |
| 513 | input.feedIntoMessageDigests(mds, inputOffset, chunkSize); |
| 514 | } catch (IOException e) { |
| 515 | throw new DigestException( |
| 516 | "Failed to digest chunk #" + chunkIndex + " of section #" |
| 517 | + dataSourceIndex, |
| 518 | e); |
| 519 | } |
| 520 | for (int i = 0; i < digestAlgorithms.length; i++) { |
| 521 | int digestAlgorithm = digestAlgorithms[i]; |
| 522 | byte[] concatenationOfChunkCountAndChunkDigests = digestsOfChunks[i]; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 523 | int expectedDigestSizeBytes = |
| 524 | getContentDigestAlgorithmOutputSizeBytes(digestAlgorithm); |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 525 | MessageDigest md = mds[i]; |
| 526 | int actualDigestSizeBytes = |
| 527 | md.digest( |
| 528 | concatenationOfChunkCountAndChunkDigests, |
| 529 | 5 + chunkIndex * expectedDigestSizeBytes, |
| 530 | expectedDigestSizeBytes); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 531 | if (actualDigestSizeBytes != expectedDigestSizeBytes) { |
| 532 | throw new RuntimeException( |
| 533 | "Unexpected output size of " + md.getAlgorithm() + " digest: " |
| 534 | + actualDigestSizeBytes); |
| 535 | } |
| 536 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 537 | inputOffset += chunkSize; |
| 538 | inputRemaining -= chunkSize; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 539 | chunkIndex++; |
| 540 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 541 | dataSourceIndex++; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 542 | } |
| 543 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 544 | byte[][] result = new byte[digestAlgorithms.length][]; |
| 545 | for (int i = 0; i < digestAlgorithms.length; i++) { |
| 546 | int digestAlgorithm = digestAlgorithms[i]; |
| 547 | byte[] input = digestsOfChunks[i]; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 548 | String jcaAlgorithmName = getContentDigestAlgorithmJcaDigestAlgorithm(digestAlgorithm); |
| 549 | MessageDigest md; |
| 550 | try { |
| 551 | md = MessageDigest.getInstance(jcaAlgorithmName); |
| 552 | } catch (NoSuchAlgorithmException e) { |
| 553 | throw new RuntimeException(jcaAlgorithmName + " digest not supported", e); |
| 554 | } |
| 555 | byte[] output = md.digest(input); |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 556 | result[i] = output; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 557 | } |
| 558 | return result; |
| 559 | } |
| 560 | |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 561 | /** |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 562 | * Returns the ZIP End of Central Directory (EoCD) and its offset in the file. |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 563 | * |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 564 | * @throws IOException if an I/O error occurs while reading the file. |
| 565 | * @throws SignatureNotFoundException if the EoCD could not be found. |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 566 | */ |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 567 | private static Pair<ByteBuffer, Long> getEocd(RandomAccessFile apk) |
| 568 | throws IOException, SignatureNotFoundException { |
| 569 | Pair<ByteBuffer, Long> eocdAndOffsetInFile = |
| 570 | ZipUtils.findZipEndOfCentralDirectoryRecord(apk); |
| 571 | if (eocdAndOffsetInFile == null) { |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 572 | throw new SignatureNotFoundException( |
| 573 | "Not an APK file: ZIP End of Central Directory record not found"); |
| 574 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 575 | return eocdAndOffsetInFile; |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 576 | } |
| 577 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 578 | private static long getCentralDirOffset(ByteBuffer eocd, long eocdOffset) |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 579 | throws SignatureNotFoundException { |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 580 | // Look up the offset of ZIP Central Directory. |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 581 | long centralDirOffset = ZipUtils.getZipEocdCentralDirectoryOffset(eocd); |
Alex Klyubin | 9694657 | 2016-12-19 10:52:52 -0800 | [diff] [blame] | 582 | if (centralDirOffset > eocdOffset) { |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 583 | throw new SignatureNotFoundException( |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 584 | "ZIP Central Directory offset out of range: " + centralDirOffset |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 585 | + ". ZIP End of Central Directory offset: " + eocdOffset); |
| 586 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 587 | long centralDirSize = ZipUtils.getZipEocdCentralDirectorySizeBytes(eocd); |
| 588 | if (centralDirOffset + centralDirSize != eocdOffset) { |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 589 | throw new SignatureNotFoundException( |
| 590 | "ZIP Central Directory is not immediately followed by End of Central" |
| 591 | + " Directory"); |
| 592 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 593 | return centralDirOffset; |
Todd Kennedy | 66c5553 | 2016-02-26 16:22:11 -0800 | [diff] [blame] | 594 | } |
| 595 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 596 | private static final long getChunkCount(long inputSizeBytes) { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 597 | return (inputSizeBytes + CHUNK_SIZE_BYTES - 1) / CHUNK_SIZE_BYTES; |
| 598 | } |
| 599 | |
| 600 | private static final int CHUNK_SIZE_BYTES = 1024 * 1024; |
| 601 | |
| 602 | private static final int SIGNATURE_RSA_PSS_WITH_SHA256 = 0x0101; |
| 603 | private static final int SIGNATURE_RSA_PSS_WITH_SHA512 = 0x0102; |
| 604 | private static final int SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA256 = 0x0103; |
| 605 | private static final int SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA512 = 0x0104; |
| 606 | private static final int SIGNATURE_ECDSA_WITH_SHA256 = 0x0201; |
| 607 | private static final int SIGNATURE_ECDSA_WITH_SHA512 = 0x0202; |
| 608 | private static final int SIGNATURE_DSA_WITH_SHA256 = 0x0301; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 609 | |
| 610 | private static final int CONTENT_DIGEST_CHUNKED_SHA256 = 1; |
| 611 | private static final int CONTENT_DIGEST_CHUNKED_SHA512 = 2; |
| 612 | |
| 613 | private static boolean isSupportedSignatureAlgorithm(int sigAlgorithm) { |
| 614 | switch (sigAlgorithm) { |
| 615 | case SIGNATURE_RSA_PSS_WITH_SHA256: |
| 616 | case SIGNATURE_RSA_PSS_WITH_SHA512: |
| 617 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA256: |
| 618 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA512: |
| 619 | case SIGNATURE_ECDSA_WITH_SHA256: |
| 620 | case SIGNATURE_ECDSA_WITH_SHA512: |
| 621 | case SIGNATURE_DSA_WITH_SHA256: |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 622 | return true; |
| 623 | default: |
| 624 | return false; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | private static int compareSignatureAlgorithm(int sigAlgorithm1, int sigAlgorithm2) { |
| 629 | int digestAlgorithm1 = getSignatureAlgorithmContentDigestAlgorithm(sigAlgorithm1); |
| 630 | int digestAlgorithm2 = getSignatureAlgorithmContentDigestAlgorithm(sigAlgorithm2); |
| 631 | return compareContentDigestAlgorithm(digestAlgorithm1, digestAlgorithm2); |
| 632 | } |
| 633 | |
| 634 | private static int compareContentDigestAlgorithm(int digestAlgorithm1, int digestAlgorithm2) { |
| 635 | switch (digestAlgorithm1) { |
| 636 | case CONTENT_DIGEST_CHUNKED_SHA256: |
| 637 | switch (digestAlgorithm2) { |
| 638 | case CONTENT_DIGEST_CHUNKED_SHA256: |
| 639 | return 0; |
| 640 | case CONTENT_DIGEST_CHUNKED_SHA512: |
| 641 | return -1; |
| 642 | default: |
| 643 | throw new IllegalArgumentException( |
| 644 | "Unknown digestAlgorithm2: " + digestAlgorithm2); |
| 645 | } |
| 646 | case CONTENT_DIGEST_CHUNKED_SHA512: |
| 647 | switch (digestAlgorithm2) { |
| 648 | case CONTENT_DIGEST_CHUNKED_SHA256: |
| 649 | return 1; |
| 650 | case CONTENT_DIGEST_CHUNKED_SHA512: |
| 651 | return 0; |
| 652 | default: |
| 653 | throw new IllegalArgumentException( |
| 654 | "Unknown digestAlgorithm2: " + digestAlgorithm2); |
| 655 | } |
| 656 | default: |
| 657 | throw new IllegalArgumentException("Unknown digestAlgorithm1: " + digestAlgorithm1); |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | private static int getSignatureAlgorithmContentDigestAlgorithm(int sigAlgorithm) { |
| 662 | switch (sigAlgorithm) { |
| 663 | case SIGNATURE_RSA_PSS_WITH_SHA256: |
| 664 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA256: |
| 665 | case SIGNATURE_ECDSA_WITH_SHA256: |
| 666 | case SIGNATURE_DSA_WITH_SHA256: |
| 667 | return CONTENT_DIGEST_CHUNKED_SHA256; |
| 668 | case SIGNATURE_RSA_PSS_WITH_SHA512: |
| 669 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA512: |
| 670 | case SIGNATURE_ECDSA_WITH_SHA512: |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 671 | return CONTENT_DIGEST_CHUNKED_SHA512; |
| 672 | default: |
| 673 | throw new IllegalArgumentException( |
| 674 | "Unknown signature algorithm: 0x" |
| 675 | + Long.toHexString(sigAlgorithm & 0xffffffff)); |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | private static String getContentDigestAlgorithmJcaDigestAlgorithm(int digestAlgorithm) { |
| 680 | switch (digestAlgorithm) { |
| 681 | case CONTENT_DIGEST_CHUNKED_SHA256: |
| 682 | return "SHA-256"; |
| 683 | case CONTENT_DIGEST_CHUNKED_SHA512: |
| 684 | return "SHA-512"; |
| 685 | default: |
| 686 | throw new IllegalArgumentException( |
| 687 | "Unknown content digest algorthm: " + digestAlgorithm); |
| 688 | } |
| 689 | } |
| 690 | |
| 691 | private static int getContentDigestAlgorithmOutputSizeBytes(int digestAlgorithm) { |
| 692 | switch (digestAlgorithm) { |
| 693 | case CONTENT_DIGEST_CHUNKED_SHA256: |
| 694 | return 256 / 8; |
| 695 | case CONTENT_DIGEST_CHUNKED_SHA512: |
| 696 | return 512 / 8; |
| 697 | default: |
| 698 | throw new IllegalArgumentException( |
| 699 | "Unknown content digest algorthm: " + digestAlgorithm); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | private static String getSignatureAlgorithmJcaKeyAlgorithm(int sigAlgorithm) { |
| 704 | switch (sigAlgorithm) { |
| 705 | case SIGNATURE_RSA_PSS_WITH_SHA256: |
| 706 | case SIGNATURE_RSA_PSS_WITH_SHA512: |
| 707 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA256: |
| 708 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA512: |
| 709 | return "RSA"; |
| 710 | case SIGNATURE_ECDSA_WITH_SHA256: |
| 711 | case SIGNATURE_ECDSA_WITH_SHA512: |
| 712 | return "EC"; |
| 713 | case SIGNATURE_DSA_WITH_SHA256: |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 714 | return "DSA"; |
| 715 | default: |
| 716 | throw new IllegalArgumentException( |
| 717 | "Unknown signature algorithm: 0x" |
| 718 | + Long.toHexString(sigAlgorithm & 0xffffffff)); |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | private static Pair<String, ? extends AlgorithmParameterSpec> |
| 723 | getSignatureAlgorithmJcaSignatureAlgorithm(int sigAlgorithm) { |
| 724 | switch (sigAlgorithm) { |
| 725 | case SIGNATURE_RSA_PSS_WITH_SHA256: |
| 726 | return Pair.create( |
| 727 | "SHA256withRSA/PSS", |
| 728 | new PSSParameterSpec( |
| 729 | "SHA-256", "MGF1", MGF1ParameterSpec.SHA256, 256 / 8, 1)); |
| 730 | case SIGNATURE_RSA_PSS_WITH_SHA512: |
| 731 | return Pair.create( |
| 732 | "SHA512withRSA/PSS", |
| 733 | new PSSParameterSpec( |
| 734 | "SHA-512", "MGF1", MGF1ParameterSpec.SHA512, 512 / 8, 1)); |
| 735 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA256: |
| 736 | return Pair.create("SHA256withRSA", null); |
| 737 | case SIGNATURE_RSA_PKCS1_V1_5_WITH_SHA512: |
| 738 | return Pair.create("SHA512withRSA", null); |
| 739 | case SIGNATURE_ECDSA_WITH_SHA256: |
| 740 | return Pair.create("SHA256withECDSA", null); |
| 741 | case SIGNATURE_ECDSA_WITH_SHA512: |
| 742 | return Pair.create("SHA512withECDSA", null); |
| 743 | case SIGNATURE_DSA_WITH_SHA256: |
| 744 | return Pair.create("SHA256withDSA", null); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 745 | default: |
| 746 | throw new IllegalArgumentException( |
| 747 | "Unknown signature algorithm: 0x" |
| 748 | + Long.toHexString(sigAlgorithm & 0xffffffff)); |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | /** |
| 753 | * Returns new byte buffer whose content is a shared subsequence of this buffer's content |
| 754 | * between the specified start (inclusive) and end (exclusive) positions. As opposed to |
| 755 | * {@link ByteBuffer#slice()}, the returned buffer's byte order is the same as the source |
| 756 | * buffer's byte order. |
| 757 | */ |
| 758 | private static ByteBuffer sliceFromTo(ByteBuffer source, int start, int end) { |
| 759 | if (start < 0) { |
| 760 | throw new IllegalArgumentException("start: " + start); |
| 761 | } |
| 762 | if (end < start) { |
| 763 | throw new IllegalArgumentException("end < start: " + end + " < " + start); |
| 764 | } |
| 765 | int capacity = source.capacity(); |
| 766 | if (end > source.capacity()) { |
| 767 | throw new IllegalArgumentException("end > capacity: " + end + " > " + capacity); |
| 768 | } |
| 769 | int originalLimit = source.limit(); |
| 770 | int originalPosition = source.position(); |
| 771 | try { |
| 772 | source.position(0); |
| 773 | source.limit(end); |
| 774 | source.position(start); |
| 775 | ByteBuffer result = source.slice(); |
| 776 | result.order(source.order()); |
| 777 | return result; |
| 778 | } finally { |
| 779 | source.position(0); |
| 780 | source.limit(originalLimit); |
| 781 | source.position(originalPosition); |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | /** |
| 786 | * Relative <em>get</em> method for reading {@code size} number of bytes from the current |
| 787 | * position of this buffer. |
| 788 | * |
| 789 | * <p>This method reads the next {@code size} bytes at this buffer's current position, |
| 790 | * returning them as a {@code ByteBuffer} with start set to 0, limit and capacity set to |
| 791 | * {@code size}, byte order set to this buffer's byte order; and then increments the position by |
| 792 | * {@code size}. |
| 793 | */ |
| 794 | private static ByteBuffer getByteBuffer(ByteBuffer source, int size) |
| 795 | throws BufferUnderflowException { |
| 796 | if (size < 0) { |
| 797 | throw new IllegalArgumentException("size: " + size); |
| 798 | } |
| 799 | int originalLimit = source.limit(); |
| 800 | int position = source.position(); |
| 801 | int limit = position + size; |
| 802 | if ((limit < position) || (limit > originalLimit)) { |
| 803 | throw new BufferUnderflowException(); |
| 804 | } |
| 805 | source.limit(limit); |
| 806 | try { |
| 807 | ByteBuffer result = source.slice(); |
| 808 | result.order(source.order()); |
| 809 | source.position(limit); |
| 810 | return result; |
| 811 | } finally { |
| 812 | source.limit(originalLimit); |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | private static ByteBuffer getLengthPrefixedSlice(ByteBuffer source) throws IOException { |
| 817 | if (source.remaining() < 4) { |
| 818 | throw new IOException( |
| 819 | "Remaining buffer too short to contain length of length-prefixed field." |
| 820 | + " Remaining: " + source.remaining()); |
| 821 | } |
| 822 | int len = source.getInt(); |
| 823 | if (len < 0) { |
| 824 | throw new IllegalArgumentException("Negative length"); |
| 825 | } else if (len > source.remaining()) { |
| 826 | throw new IOException("Length-prefixed field longer than remaining buffer." |
| 827 | + " Field length: " + len + ", remaining: " + source.remaining()); |
| 828 | } |
| 829 | return getByteBuffer(source, len); |
| 830 | } |
| 831 | |
| 832 | private static byte[] readLengthPrefixedByteArray(ByteBuffer buf) throws IOException { |
| 833 | int len = buf.getInt(); |
| 834 | if (len < 0) { |
| 835 | throw new IOException("Negative length"); |
| 836 | } else if (len > buf.remaining()) { |
| 837 | throw new IOException("Underflow while reading length-prefixed value. Length: " + len |
| 838 | + ", available: " + buf.remaining()); |
| 839 | } |
| 840 | byte[] result = new byte[len]; |
| 841 | buf.get(result); |
| 842 | return result; |
| 843 | } |
| 844 | |
| 845 | private static void setUnsignedInt32LittleEndian(int value, byte[] result, int offset) { |
| 846 | result[offset] = (byte) (value & 0xff); |
| 847 | result[offset + 1] = (byte) ((value >>> 8) & 0xff); |
| 848 | result[offset + 2] = (byte) ((value >>> 16) & 0xff); |
| 849 | result[offset + 3] = (byte) ((value >>> 24) & 0xff); |
| 850 | } |
| 851 | |
| 852 | private static final long APK_SIG_BLOCK_MAGIC_HI = 0x3234206b636f6c42L; |
| 853 | private static final long APK_SIG_BLOCK_MAGIC_LO = 0x20676953204b5041L; |
| 854 | private static final int APK_SIG_BLOCK_MIN_SIZE = 32; |
| 855 | |
| 856 | private static final int APK_SIGNATURE_SCHEME_V2_BLOCK_ID = 0x7109871a; |
| 857 | |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 858 | private static Pair<ByteBuffer, Long> findApkSigningBlock( |
| 859 | RandomAccessFile apk, long centralDirOffset) |
| 860 | throws IOException, SignatureNotFoundException { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 861 | // FORMAT: |
| 862 | // OFFSET DATA TYPE DESCRIPTION |
| 863 | // * @+0 bytes uint64: size in bytes (excluding this field) |
| 864 | // * @+8 bytes payload |
| 865 | // * @-24 bytes uint64: size in bytes (same as the one above) |
| 866 | // * @-16 bytes uint128: magic |
| 867 | |
| 868 | if (centralDirOffset < APK_SIG_BLOCK_MIN_SIZE) { |
| 869 | throw new SignatureNotFoundException( |
| 870 | "APK too small for APK Signing Block. ZIP Central Directory offset: " |
| 871 | + centralDirOffset); |
| 872 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 873 | // Read the magic and offset in file from the footer section of the block: |
| 874 | // * uint64: size of block |
| 875 | // * 16 bytes: magic |
| 876 | ByteBuffer footer = ByteBuffer.allocate(24); |
| 877 | footer.order(ByteOrder.LITTLE_ENDIAN); |
| 878 | apk.seek(centralDirOffset - footer.capacity()); |
| 879 | apk.readFully(footer.array(), footer.arrayOffset(), footer.capacity()); |
| 880 | if ((footer.getLong(8) != APK_SIG_BLOCK_MAGIC_LO) |
| 881 | || (footer.getLong(16) != APK_SIG_BLOCK_MAGIC_HI)) { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 882 | throw new SignatureNotFoundException( |
| 883 | "No APK Signing Block before ZIP Central Directory"); |
| 884 | } |
| 885 | // Read and compare size fields |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 886 | long apkSigBlockSizeInFooter = footer.getLong(0); |
| 887 | if ((apkSigBlockSizeInFooter < footer.capacity()) |
| 888 | || (apkSigBlockSizeInFooter > Integer.MAX_VALUE - 8)) { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 889 | throw new SignatureNotFoundException( |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 890 | "APK Signing Block size out of range: " + apkSigBlockSizeInFooter); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 891 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 892 | int totalSize = (int) (apkSigBlockSizeInFooter + 8); |
| 893 | long apkSigBlockOffset = centralDirOffset - totalSize; |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 894 | if (apkSigBlockOffset < 0) { |
| 895 | throw new SignatureNotFoundException( |
| 896 | "APK Signing Block offset out of range: " + apkSigBlockOffset); |
| 897 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 898 | ByteBuffer apkSigBlock = ByteBuffer.allocate(totalSize); |
| 899 | apkSigBlock.order(ByteOrder.LITTLE_ENDIAN); |
| 900 | apk.seek(apkSigBlockOffset); |
| 901 | apk.readFully(apkSigBlock.array(), apkSigBlock.arrayOffset(), apkSigBlock.capacity()); |
| 902 | long apkSigBlockSizeInHeader = apkSigBlock.getLong(0); |
| 903 | if (apkSigBlockSizeInHeader != apkSigBlockSizeInFooter) { |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 904 | throw new SignatureNotFoundException( |
| 905 | "APK Signing Block sizes in header and footer do not match: " |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 906 | + apkSigBlockSizeInHeader + " vs " + apkSigBlockSizeInFooter); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 907 | } |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 908 | return Pair.create(apkSigBlock, apkSigBlockOffset); |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 909 | } |
| 910 | |
| 911 | private static ByteBuffer findApkSignatureSchemeV2Block(ByteBuffer apkSigningBlock) |
| 912 | throws SignatureNotFoundException { |
| 913 | checkByteOrderLittleEndian(apkSigningBlock); |
| 914 | // FORMAT: |
| 915 | // OFFSET DATA TYPE DESCRIPTION |
| 916 | // * @+0 bytes uint64: size in bytes (excluding this field) |
| 917 | // * @+8 bytes pairs |
| 918 | // * @-24 bytes uint64: size in bytes (same as the one above) |
| 919 | // * @-16 bytes uint128: magic |
| 920 | ByteBuffer pairs = sliceFromTo(apkSigningBlock, 8, apkSigningBlock.capacity() - 24); |
| 921 | |
| 922 | int entryCount = 0; |
| 923 | while (pairs.hasRemaining()) { |
| 924 | entryCount++; |
| 925 | if (pairs.remaining() < 8) { |
| 926 | throw new SignatureNotFoundException( |
| 927 | "Insufficient data to read size of APK Signing Block entry #" + entryCount); |
| 928 | } |
| 929 | long lenLong = pairs.getLong(); |
| 930 | if ((lenLong < 4) || (lenLong > Integer.MAX_VALUE)) { |
| 931 | throw new SignatureNotFoundException( |
| 932 | "APK Signing Block entry #" + entryCount |
| 933 | + " size out of range: " + lenLong); |
| 934 | } |
| 935 | int len = (int) lenLong; |
| 936 | int nextEntryPos = pairs.position() + len; |
| 937 | if (len > pairs.remaining()) { |
| 938 | throw new SignatureNotFoundException( |
| 939 | "APK Signing Block entry #" + entryCount + " size out of range: " + len |
| 940 | + ", available: " + pairs.remaining()); |
| 941 | } |
| 942 | int id = pairs.getInt(); |
| 943 | if (id == APK_SIGNATURE_SCHEME_V2_BLOCK_ID) { |
| 944 | return getByteBuffer(pairs, len - 4); |
| 945 | } |
| 946 | pairs.position(nextEntryPos); |
| 947 | } |
| 948 | |
| 949 | throw new SignatureNotFoundException( |
| 950 | "No APK Signature Scheme v2 block in APK Signing Block"); |
| 951 | } |
| 952 | |
| 953 | private static void checkByteOrderLittleEndian(ByteBuffer buffer) { |
| 954 | if (buffer.order() != ByteOrder.LITTLE_ENDIAN) { |
| 955 | throw new IllegalArgumentException("ByteBuffer byte order must be little endian"); |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | public static class SignatureNotFoundException extends Exception { |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 960 | private static final long serialVersionUID = 1L; |
| 961 | |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 962 | public SignatureNotFoundException(String message) { |
| 963 | super(message); |
| 964 | } |
| 965 | |
| 966 | public SignatureNotFoundException(String message, Throwable cause) { |
| 967 | super(message, cause); |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | /** |
Alex Klyubin | 0722ffc | 2016-03-18 16:09:06 -0700 | [diff] [blame] | 972 | * Source of data to be digested. |
| 973 | */ |
| 974 | private static interface DataSource { |
| 975 | |
| 976 | /** |
| 977 | * Returns the size (in bytes) of the data offered by this source. |
| 978 | */ |
| 979 | long size(); |
| 980 | |
| 981 | /** |
| 982 | * Feeds the specified region of this source's data into the provided digests. Each digest |
| 983 | * instance gets the same data. |
| 984 | * |
| 985 | * @param offset offset of the region inside this data source. |
| 986 | * @param size size (in bytes) of the region. |
| 987 | */ |
| 988 | void feedIntoMessageDigests(MessageDigest[] mds, long offset, int size) throws IOException; |
| 989 | } |
| 990 | |
| 991 | /** |
| 992 | * {@link DataSource} which provides data from a file descriptor by memory-mapping the sections |
| 993 | * of the file requested by |
| 994 | * {@link DataSource#feedIntoMessageDigests(MessageDigest[], long, int) feedIntoMessageDigests}. |
| 995 | */ |
| 996 | private static final class MemoryMappedFileDataSource implements DataSource { |
| 997 | private static final Os OS = Libcore.os; |
| 998 | private static final long MEMORY_PAGE_SIZE_BYTES = OS.sysconf(OsConstants._SC_PAGESIZE); |
| 999 | |
| 1000 | private final FileDescriptor mFd; |
| 1001 | private final long mFilePosition; |
| 1002 | private final long mSize; |
| 1003 | |
| 1004 | /** |
| 1005 | * Constructs a new {@code MemoryMappedFileDataSource} for the specified region of the file. |
| 1006 | * |
| 1007 | * @param position start position of the region in the file. |
| 1008 | * @param size size (in bytes) of the region. |
| 1009 | */ |
| 1010 | public MemoryMappedFileDataSource(FileDescriptor fd, long position, long size) { |
| 1011 | mFd = fd; |
| 1012 | mFilePosition = position; |
| 1013 | mSize = size; |
| 1014 | } |
| 1015 | |
| 1016 | @Override |
| 1017 | public long size() { |
| 1018 | return mSize; |
| 1019 | } |
| 1020 | |
| 1021 | @Override |
| 1022 | public void feedIntoMessageDigests( |
| 1023 | MessageDigest[] mds, long offset, int size) throws IOException { |
| 1024 | // IMPLEMENTATION NOTE: After a lot of experimentation, the implementation of this |
| 1025 | // method was settled on a straightforward mmap with prefaulting. |
| 1026 | // |
| 1027 | // This method is not using FileChannel.map API because that API does not offset a way |
| 1028 | // to "prefault" the resulting memory pages. Without prefaulting, performance is about |
| 1029 | // 10% slower on small to medium APKs, but is significantly worse for APKs in 500+ MB |
| 1030 | // range. FileChannel.load (which currently uses madvise) doesn't help. Finally, |
| 1031 | // invoking madvise (MADV_SEQUENTIAL) after mmap with prefaulting wastes quite a bit of |
| 1032 | // time, which is not compensated for by faster reads. |
| 1033 | |
| 1034 | // We mmap the smallest region of the file containing the requested data. mmap requires |
| 1035 | // that the start offset in the file must be a multiple of memory page size. We thus may |
| 1036 | // need to mmap from an offset less than the requested offset. |
| 1037 | long filePosition = mFilePosition + offset; |
| 1038 | long mmapFilePosition = |
| 1039 | (filePosition / MEMORY_PAGE_SIZE_BYTES) * MEMORY_PAGE_SIZE_BYTES; |
| 1040 | int dataStartOffsetInMmapRegion = (int) (filePosition - mmapFilePosition); |
| 1041 | long mmapRegionSize = size + dataStartOffsetInMmapRegion; |
| 1042 | long mmapPtr = 0; |
| 1043 | try { |
| 1044 | mmapPtr = OS.mmap( |
| 1045 | 0, // let the OS choose the start address of the region in memory |
| 1046 | mmapRegionSize, |
| 1047 | OsConstants.PROT_READ, |
| 1048 | OsConstants.MAP_SHARED | OsConstants.MAP_POPULATE, // "prefault" all pages |
| 1049 | mFd, |
| 1050 | mmapFilePosition); |
| 1051 | // Feeding a memory region into MessageDigest requires the region to be represented |
| 1052 | // as a direct ByteBuffer. |
| 1053 | ByteBuffer buf = new DirectByteBuffer( |
| 1054 | size, |
| 1055 | mmapPtr + dataStartOffsetInMmapRegion, |
| 1056 | mFd, // not really needed, but just in case |
| 1057 | null, // no need to clean up -- it's taken care of by the finally block |
| 1058 | true // read only buffer |
| 1059 | ); |
| 1060 | for (MessageDigest md : mds) { |
| 1061 | buf.position(0); |
| 1062 | md.update(buf); |
| 1063 | } |
| 1064 | } catch (ErrnoException e) { |
| 1065 | throw new IOException("Failed to mmap " + mmapRegionSize + " bytes", e); |
| 1066 | } finally { |
| 1067 | if (mmapPtr != 0) { |
| 1068 | try { |
| 1069 | OS.munmap(mmapPtr, mmapRegionSize); |
| 1070 | } catch (ErrnoException ignored) {} |
| 1071 | } |
| 1072 | } |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | /** |
| 1077 | * {@link DataSource} which provides data from a {@link ByteBuffer}. |
| 1078 | */ |
| 1079 | private static final class ByteBufferDataSource implements DataSource { |
| 1080 | /** |
| 1081 | * Underlying buffer. The data is stored between position 0 and the buffer's capacity. |
| 1082 | * The buffer's position is 0 and limit is equal to capacity. |
| 1083 | */ |
| 1084 | private final ByteBuffer mBuf; |
| 1085 | |
| 1086 | public ByteBufferDataSource(ByteBuffer buf) { |
| 1087 | // Defensive copy, to avoid changes to mBuf being visible in buf. |
| 1088 | mBuf = buf.slice(); |
| 1089 | } |
| 1090 | |
| 1091 | @Override |
| 1092 | public long size() { |
| 1093 | return mBuf.capacity(); |
| 1094 | } |
| 1095 | |
| 1096 | @Override |
| 1097 | public void feedIntoMessageDigests( |
| 1098 | MessageDigest[] mds, long offset, int size) throws IOException { |
| 1099 | // There's no way to tell MessageDigest to read data from ByteBuffer from a position |
| 1100 | // other than the buffer's current position. We thus need to change the buffer's |
| 1101 | // position to match the requested offset. |
| 1102 | // |
| 1103 | // In the future, it may be necessary to compute digests of multiple regions in |
| 1104 | // parallel. Given that digest computation is a slow operation, we enable multiple |
| 1105 | // such requests to be fulfilled by this instance. This is achieved by serially |
| 1106 | // creating a new ByteBuffer corresponding to the requested data range and then, |
| 1107 | // potentially concurrently, feeding these buffers into MessageDigest instances. |
| 1108 | ByteBuffer region; |
| 1109 | synchronized (mBuf) { |
| 1110 | mBuf.position((int) offset); |
| 1111 | mBuf.limit((int) offset + size); |
| 1112 | region = mBuf.slice(); |
| 1113 | } |
| 1114 | |
| 1115 | for (MessageDigest md : mds) { |
| 1116 | // Need to reset position to 0 at the start of each iteration because |
| 1117 | // MessageDigest.update below sets it to the buffer's limit. |
| 1118 | region.position(0); |
| 1119 | md.update(region); |
| 1120 | } |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | /** |
Alex Klyubin | e415718 | 2016-01-05 13:27:05 -0800 | [diff] [blame] | 1125 | * For legacy reasons we need to return exactly the original encoded certificate bytes, instead |
| 1126 | * of letting the underlying implementation have a shot at re-encoding the data. |
| 1127 | */ |
| 1128 | private static class VerbatimX509Certificate extends WrappedX509Certificate { |
| 1129 | private byte[] encodedVerbatim; |
| 1130 | |
| 1131 | public VerbatimX509Certificate(X509Certificate wrapped, byte[] encodedVerbatim) { |
| 1132 | super(wrapped); |
| 1133 | this.encodedVerbatim = encodedVerbatim; |
| 1134 | } |
| 1135 | |
| 1136 | @Override |
| 1137 | public byte[] getEncoded() throws CertificateEncodingException { |
| 1138 | return encodedVerbatim; |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | private static class WrappedX509Certificate extends X509Certificate { |
| 1143 | private final X509Certificate wrapped; |
| 1144 | |
| 1145 | public WrappedX509Certificate(X509Certificate wrapped) { |
| 1146 | this.wrapped = wrapped; |
| 1147 | } |
| 1148 | |
| 1149 | @Override |
| 1150 | public Set<String> getCriticalExtensionOIDs() { |
| 1151 | return wrapped.getCriticalExtensionOIDs(); |
| 1152 | } |
| 1153 | |
| 1154 | @Override |
| 1155 | public byte[] getExtensionValue(String oid) { |
| 1156 | return wrapped.getExtensionValue(oid); |
| 1157 | } |
| 1158 | |
| 1159 | @Override |
| 1160 | public Set<String> getNonCriticalExtensionOIDs() { |
| 1161 | return wrapped.getNonCriticalExtensionOIDs(); |
| 1162 | } |
| 1163 | |
| 1164 | @Override |
| 1165 | public boolean hasUnsupportedCriticalExtension() { |
| 1166 | return wrapped.hasUnsupportedCriticalExtension(); |
| 1167 | } |
| 1168 | |
| 1169 | @Override |
| 1170 | public void checkValidity() |
| 1171 | throws CertificateExpiredException, CertificateNotYetValidException { |
| 1172 | wrapped.checkValidity(); |
| 1173 | } |
| 1174 | |
| 1175 | @Override |
| 1176 | public void checkValidity(Date date) |
| 1177 | throws CertificateExpiredException, CertificateNotYetValidException { |
| 1178 | wrapped.checkValidity(date); |
| 1179 | } |
| 1180 | |
| 1181 | @Override |
| 1182 | public int getVersion() { |
| 1183 | return wrapped.getVersion(); |
| 1184 | } |
| 1185 | |
| 1186 | @Override |
| 1187 | public BigInteger getSerialNumber() { |
| 1188 | return wrapped.getSerialNumber(); |
| 1189 | } |
| 1190 | |
| 1191 | @Override |
| 1192 | public Principal getIssuerDN() { |
| 1193 | return wrapped.getIssuerDN(); |
| 1194 | } |
| 1195 | |
| 1196 | @Override |
| 1197 | public Principal getSubjectDN() { |
| 1198 | return wrapped.getSubjectDN(); |
| 1199 | } |
| 1200 | |
| 1201 | @Override |
| 1202 | public Date getNotBefore() { |
| 1203 | return wrapped.getNotBefore(); |
| 1204 | } |
| 1205 | |
| 1206 | @Override |
| 1207 | public Date getNotAfter() { |
| 1208 | return wrapped.getNotAfter(); |
| 1209 | } |
| 1210 | |
| 1211 | @Override |
| 1212 | public byte[] getTBSCertificate() throws CertificateEncodingException { |
| 1213 | return wrapped.getTBSCertificate(); |
| 1214 | } |
| 1215 | |
| 1216 | @Override |
| 1217 | public byte[] getSignature() { |
| 1218 | return wrapped.getSignature(); |
| 1219 | } |
| 1220 | |
| 1221 | @Override |
| 1222 | public String getSigAlgName() { |
| 1223 | return wrapped.getSigAlgName(); |
| 1224 | } |
| 1225 | |
| 1226 | @Override |
| 1227 | public String getSigAlgOID() { |
| 1228 | return wrapped.getSigAlgOID(); |
| 1229 | } |
| 1230 | |
| 1231 | @Override |
| 1232 | public byte[] getSigAlgParams() { |
| 1233 | return wrapped.getSigAlgParams(); |
| 1234 | } |
| 1235 | |
| 1236 | @Override |
| 1237 | public boolean[] getIssuerUniqueID() { |
| 1238 | return wrapped.getIssuerUniqueID(); |
| 1239 | } |
| 1240 | |
| 1241 | @Override |
| 1242 | public boolean[] getSubjectUniqueID() { |
| 1243 | return wrapped.getSubjectUniqueID(); |
| 1244 | } |
| 1245 | |
| 1246 | @Override |
| 1247 | public boolean[] getKeyUsage() { |
| 1248 | return wrapped.getKeyUsage(); |
| 1249 | } |
| 1250 | |
| 1251 | @Override |
| 1252 | public int getBasicConstraints() { |
| 1253 | return wrapped.getBasicConstraints(); |
| 1254 | } |
| 1255 | |
| 1256 | @Override |
| 1257 | public byte[] getEncoded() throws CertificateEncodingException { |
| 1258 | return wrapped.getEncoded(); |
| 1259 | } |
| 1260 | |
| 1261 | @Override |
| 1262 | public void verify(PublicKey key) throws CertificateException, NoSuchAlgorithmException, |
| 1263 | InvalidKeyException, NoSuchProviderException, SignatureException { |
| 1264 | wrapped.verify(key); |
| 1265 | } |
| 1266 | |
| 1267 | @Override |
| 1268 | public void verify(PublicKey key, String sigProvider) |
| 1269 | throws CertificateException, NoSuchAlgorithmException, InvalidKeyException, |
| 1270 | NoSuchProviderException, SignatureException { |
| 1271 | wrapped.verify(key, sigProvider); |
| 1272 | } |
| 1273 | |
| 1274 | @Override |
| 1275 | public String toString() { |
| 1276 | return wrapped.toString(); |
| 1277 | } |
| 1278 | |
| 1279 | @Override |
| 1280 | public PublicKey getPublicKey() { |
| 1281 | return wrapped.getPublicKey(); |
| 1282 | } |
| 1283 | } |
| 1284 | } |