openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/main/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManager.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * SDC
   4  * ================================================================================
   5  * Copyright (C) 2019, Nordix Foundation. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.openecomp.sdc.vendorsoftwareproduct.security;
  21
  22 import com.google.common.collect.ImmutableSet;
  23 import java.io.BufferedOutputStream;
  24 import java.io.ByteArrayInputStream;
  25 import java.io.File;
  26 import java.io.FileInputStream;
  27 import java.io.FileOutputStream;
  28 import java.io.IOException;
  29 import java.io.InputStream;
  30 import java.io.InputStreamReader;
  31 import java.nio.file.Files;
  32 import java.nio.file.Path;
  33 import java.security.GeneralSecurityException;
  34 import java.security.InvalidAlgorithmParameterException;
  35 import java.security.NoSuchAlgorithmException;
  36 import java.security.NoSuchProviderException;
  37 import java.security.Security;
  38 import java.security.cert.CertPathBuilder;
  39 import java.security.cert.CertStore;
  40 import java.security.cert.CertificateException;
  41 import java.security.cert.CertificateExpiredException;
  42 import java.security.cert.CertificateFactory;
  43 import java.security.cert.CertificateNotYetValidException;
  44 import java.security.cert.CollectionCertStoreParameters;
  45 import java.security.cert.PKIXBuilderParameters;
  46 import java.security.cert.PKIXCertPathBuilderResult;
  47 import java.security.cert.TrustAnchor;
  48 import java.security.cert.X509CertSelector;
  49 import java.security.cert.X509Certificate;
  50 import java.util.Collection;
  51 import java.util.HashSet;
  52 import java.util.Optional;
  53 import java.util.Set;
  54 import java.util.UUID;
  55 import java.util.concurrent.atomic.AtomicBoolean;
  56 import java.util.function.Predicate;
  57 import java.util.stream.Collectors;
  58 import java.util.stream.Stream;
  59 import java.util.zip.ZipEntry;
  60 import java.util.zip.ZipInputStream;
  61 import org.bouncycastle.asn1.cms.ContentInfo;
  62 import org.bouncycastle.cert.X509CertificateHolder;
  63 import org.bouncycastle.cms.CMSException;
  64 import org.bouncycastle.cms.CMSProcessableByteArray;
  65 import org.bouncycastle.cms.CMSProcessableFile;
  66 import org.bouncycastle.cms.CMSSignedData;
  67 import org.bouncycastle.cms.SignerInformation;
  68 import org.bouncycastle.cms.jcajce.JcaSimpleSignerInfoVerifierBuilder;
  69 import org.bouncycastle.jce.provider.BouncyCastleProvider;
  70 import org.bouncycastle.openssl.PEMParser;
  71 import org.bouncycastle.operator.OperatorCreationException;
  72 import org.openecomp.sdc.be.csar.storage.ArtifactInfo;
  73 import org.openecomp.sdc.be.csar.storage.ArtifactStorageConfig;
  74 import org.openecomp.sdc.be.csar.storage.ArtifactStorageManager;
  75 import org.openecomp.sdc.be.csar.storage.StorageFactory;
  76 import org.openecomp.sdc.logging.api.Logger;
  77 import org.openecomp.sdc.logging.api.LoggerFactory;
  78 import org.openecomp.sdc.vendorsoftwareproduct.types.OnboardSignedPackage;
  79
  80 /**
  81  * This is temporary solution. When AAF provides functionality for verifying trustedCertificates, this class should be reviewed Class is responsible
  82  * for providing root trustedCertificates from configured location in onboarding container.
  83  */
  84 public class SecurityManager {
  85
  86     public static final Set<String> ALLOWED_SIGNATURE_EXTENSIONS = Set.of("cms");
  87     public static final Set<String> ALLOWED_CERTIFICATE_EXTENSIONS = Set.of("cert", "crt");
  88     private static final String CERTIFICATE_DEFAULT_LOCATION = "cert";
  89     private static final Logger LOGGER = LoggerFactory.getLogger(SecurityManager.class);
  90     private static final String UNEXPECTED_ERROR_OCCURRED_DURING_SIGNATURE_VALIDATION = "Unexpected error occurred during signature validation!";
  91     private static final String COULD_NOT_VERIFY_SIGNATURE = "Could not verify signature!";
  92
  93     static {
  94         if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
  95             Security.addProvider(new BouncyCastleProvider());
  96         }
  97     }
  98
  99     private Set<X509Certificate> trustedCertificates = new HashSet<>();
 100     private Set<X509Certificate> trustedCertificatesFromPackage = new HashSet<>();
 101     private File certificateDirectory;
 102
 103     private SecurityManager() {
 104         certificateDirectory = this.getcertDirectory(System.getenv("SDC_CERT_DIR"));
 105     }
 106
 107     // Package level constructor use in tests to avoid power mock
 108     SecurityManager(String sdcCertDir) {
 109         certificateDirectory = this.getcertDirectory(sdcCertDir);
 110     }
 111
 112     public static SecurityManager getInstance() {
 113         return SecurityManagerInstanceHolder.instance;
 114     }
 115
 116     /**
 117      * Checks the configured location for available trustedCertificates
 118      *
 119      * @return set of trustedCertificates
 120      * @throws SecurityManagerException
 121      */
 122     public Set<X509Certificate> getTrustedCertificates() throws SecurityManagerException {
 123         //if file number in certificate directory changed reload certs
 124         String[] certFiles = certificateDirectory.list();
 125         if (certFiles == null) {
 126             LOGGER.error("Certificate directory is empty!");
 127             return ImmutableSet.copyOf(new HashSet<>());
 128         }
 129         if (trustedCertificates.size() != certFiles.length) {
 130             trustedCertificates = new HashSet<>();
 131             processCertificateDir();
 132         }
 133         if (!trustedCertificatesFromPackage.isEmpty()) {
 134             return Stream.concat(trustedCertificatesFromPackage.stream(), trustedCertificates.stream()).collect(Collectors.toUnmodifiableSet());
 135         }
 136         return ImmutableSet.copyOf(trustedCertificates);
 137     }
 138
 139     /**
 140      * Cleans certificate collection
 141      */
 142     public void cleanTrustedCertificates() {
 143         trustedCertificates.clear();
 144     }
 145
 146     /**
 147      * Verifies if packaged signed with trusted certificate
 148      *
 149      * @param messageSyntaxSignature - signature data in cms format
 150      * @param packageCert            - package certificate if not part of cms signature, can be null
 151      * @param innerPackageFile       data package signed with cms signature
 152      * @return true if signature verified
 153      * @throws SecurityManagerException
 154      */
 155     public boolean verifySignedData(final byte[] messageSyntaxSignature,
 156                                     final byte[] packageCert,
 157                                     final byte[] innerPackageFile) throws SecurityManagerException {
 158         try (final ByteArrayInputStream signatureStream = new ByteArrayInputStream(messageSyntaxSignature);
 159             final PEMParser pemParser = new PEMParser(new InputStreamReader(signatureStream))) {
 160             final Object parsedObject = pemParser.readObject();
 161             if (!(parsedObject instanceof ContentInfo)) {
 162                 throw new SecurityManagerException("Signature is not recognized");
 163             }
 164             return verify(packageCert, new CMSSignedData(new CMSProcessableByteArray(innerPackageFile), ContentInfo.getInstance(parsedObject)));
 165         } catch (final IOException | CMSException e) {
 166             LOGGER.error(e.getMessage(), e);
 167             throw new SecurityManagerException(UNEXPECTED_ERROR_OCCURRED_DURING_SIGNATURE_VALIDATION, e);
 168         }
 169     }
 170
 171     public boolean verifyPackageSignedData(final OnboardSignedPackage signedPackage, final ArtifactInfo artifactInfo)
 172         throws SecurityManagerException {
 173         boolean fail = false;
 174
 175         final StorageFactory storageFactory = new StorageFactory();
 176         final ArtifactStorageManager artifactStorageManager = storageFactory.createArtifactStorageManager();
 177         final ArtifactStorageConfig storageConfiguration = artifactStorageManager.getStorageConfiguration();
 178
 179         final var fileContentHandler = signedPackage.getFileContentHandler();
 180         byte[] packageCert = null;
 181         final Optional<String> certificateFilePath = signedPackage.getCertificateFilePath();
 182         if (certificateFilePath.isPresent()) {
 183             packageCert = fileContentHandler.getFileContent(certificateFilePath.get());
 184         }
 185
 186         final Path folder = Path.of(storageConfiguration.getTempPath());
 187         try {
 188             Files.createDirectories(folder);
 189         } catch (final IOException e) {
 190             fail = true;
 191             LOGGER.error("Failed to create directory '{}'", folder, e);
 192             throw new SecurityManagerException(String.format("Failed to create directory '%s'", folder), e);
 193         }
 194
 195         final var target = folder.resolve(UUID.randomUUID().toString());
 196
 197         try (final var signatureStream = new ByteArrayInputStream(fileContentHandler.getFileContent(signedPackage.getSignatureFilePath()));
 198             final var pemParser = new PEMParser(new InputStreamReader(signatureStream))) {
 199             final var parsedObject = pemParser.readObject();
 200             if (!(parsedObject instanceof ContentInfo)) {
 201                 fail = true;
 202                 LOGGER.error("Signature is not recognized");
 203                 throw new SecurityManagerException("Signature is not recognized");
 204             }
 205
 206             try (final InputStream inputStream = artifactStorageManager.get(artifactInfo)) {
 207                 if (!findCSARandExtract(inputStream, target)) {
 208                     fail = true;
 209                     return false;
 210                 }
 211             }
 212             final var verify = verify(packageCert, new CMSSignedData(new CMSProcessableFile(target.toFile()), ContentInfo.getInstance(parsedObject)));
 213             fail = !verify;
 214             return verify;
 215         } catch (final IOException e) {
 216             fail = true;
 217             LOGGER.error(e.getMessage(), e);
 218             throw new SecurityManagerException(UNEXPECTED_ERROR_OCCURRED_DURING_SIGNATURE_VALIDATION, e);
 219         } catch (final CMSException e) {
 220             fail = true;
 221             LOGGER.error(e.getMessage(), e);
 222             throw new SecurityManagerException(COULD_NOT_VERIFY_SIGNATURE, e);
 223         } catch (final SecurityManagerException e) {
 224             fail = true;
 225             LOGGER.error(e.getMessage(), e);
 226             throw e;
 227         } finally {
 228             deleteFile(target);
 229             if (fail) {
 230                 artifactStorageManager.delete(artifactInfo);
 231             }
 232         }
 233     }
 234
 235     private void deleteFile(final Path filePath) {
 236         try {
 237             Files.delete(filePath);
 238         } catch (final IOException e) {
 239             LOGGER.warn("Failed to delete '{}' after verifying package signed data", filePath, e);
 240         }
 241     }
 242
 243     private boolean verify(final byte[] packageCert, final CMSSignedData signedData) throws SecurityManagerException {
 244         final SignerInformation firstSigner = signedData.getSignerInfos().getSigners().iterator().next();
 245         final X509Certificate cert;
 246         Collection<X509CertificateHolder> certs;
 247         if (packageCert == null) {
 248             certs = signedData.getCertificates().getMatches(null);
 249             cert = readSignCert(certs, firstSigner)
 250                 .orElseThrow(() -> new SecurityManagerException("No certificate found in cms signature that should contain one!"));
 251         } else {
 252             try {
 253                 certs = parseCertsFromPem(packageCert);
 254             } catch (final IOException e) {
 255                 LOGGER.error("Failed to parse certificate from PEM", e);
 256                 throw new SecurityManagerException("Failed to parse certificate from PEM", e);
 257             }
 258             cert = readSignCert(certs, firstSigner)
 259                 .orElseThrow(() -> new SecurityManagerException("No matching certificate found in certificate file that should contain one!"));
 260         }
 261         trustedCertificatesFromPackage = readTrustedCerts(certs, firstSigner);
 262         if (verifyCertificate(cert, getTrustedCertificates()) == null) {
 263             return false;
 264         }
 265         try {
 266             return firstSigner.verify(new JcaSimpleSignerInfoVerifierBuilder().build(cert));
 267         } catch (CMSException | OperatorCreationException e) {
 268             LOGGER.error("Failed to verify package signed data", e);
 269             throw new SecurityManagerException("Failed to verify package signed data", e);
 270         }
 271     }
 272
 273     private boolean findCSARandExtract(final InputStream inputStream, final Path target) throws IOException {
 274         final AtomicBoolean found = new AtomicBoolean(false);
 275
 276         final var zipInputStream = new ZipInputStream(inputStream);
 277         ZipEntry zipEntry;
 278         byte[] buffer = new byte[2048];
 279         while ((zipEntry = zipInputStream.getNextEntry()) != null) {
 280             final var entryName = zipEntry.getName();
 281             if (!zipEntry.isDirectory() && entryName.toLowerCase().endsWith(".csar")) {
 282                 try (final FileOutputStream fos = new FileOutputStream(target.toFile());
 283                     final BufferedOutputStream bos = new BufferedOutputStream(fos, buffer.length)) {
 284
 285                     int len;
 286                     while ((len = zipInputStream.read(buffer)) > 0) {
 287                         bos.write(buffer, 0, len);
 288                     }
 289                 }
 290                 found.set(true);
 291             }
 292         }
 293         return found.get();
 294     }
 295
 296     private Optional<X509Certificate> readSignCert(final Collection<X509CertificateHolder> certs, final SignerInformation firstSigner) {
 297         return certs.stream().filter(crt -> firstSigner.getSID().match(crt)).findAny().map(this::loadCertificate);
 298     }
 299
 300     private Set<X509Certificate> readTrustedCerts(final Collection<X509CertificateHolder> certs, final SignerInformation firstSigner) {
 301         return certs.stream().filter(crt -> !firstSigner.getSID().match(crt)).map(this::loadCertificate).filter(Predicate.not(this::isSelfSigned))
 302             .collect(Collectors.toSet());
 303     }
 304
 305     private Set<X509CertificateHolder> parseCertsFromPem(final byte[] packageCert) throws IOException {
 306         final ByteArrayInputStream packageCertStream = new ByteArrayInputStream(packageCert);
 307         final PEMParser pemParser = new PEMParser(new InputStreamReader(packageCertStream));
 308         Object readObject = pemParser.readObject();
 309         Set<X509CertificateHolder> allCerts = new HashSet<>();
 310         while (readObject != null) {
 311             if (readObject instanceof X509CertificateHolder) {
 312                 allCerts.add((X509CertificateHolder) readObject);
 313             }
 314             readObject = pemParser.readObject();
 315         }
 316         return allCerts;
 317     }
 318
 319     private void processCertificateDir() throws SecurityManagerException {
 320         if (!certificateDirectory.exists() || !certificateDirectory.isDirectory()) {
 321             LOGGER.error("Issue with certificate directory, check if exists!");
 322             return;
 323         }
 324         File[] files = certificateDirectory.listFiles();
 325         if (files == null) {
 326             LOGGER.error("Certificate directory is empty!");
 327             return;
 328         }
 329         for (File f : files) {
 330             trustedCertificates.add(loadCertificate(f));
 331         }
 332     }
 333
 334     private File getcertDirectory(String sdcCertDir) {
 335         String certDirLocation = sdcCertDir;
 336         if (certDirLocation == null) {
 337             certDirLocation = CERTIFICATE_DEFAULT_LOCATION;
 338         }
 339         return new File(certDirLocation);
 340     }
 341
 342     private X509Certificate loadCertificate(File certFile) throws SecurityManagerException {
 343         try (FileInputStream fi = new FileInputStream(certFile)) {
 344             return loadCertificateFactory(fi);
 345         } catch (IOException e) {
 346             LOGGER.error("Error during loading Certificate from file!", e);
 347             throw new SecurityManagerException("Error during loading Certificate from file!", e);
 348         }
 349     }
 350
 351     private X509Certificate loadCertificate(X509CertificateHolder cert) {
 352         try {
 353             return loadCertificateFactory(new ByteArrayInputStream(cert.getEncoded()));
 354         } catch (IOException | SecurityManagerException e) {
 355             LOGGER.error("Error during loading Certificate from bytes!", e);
 356             throw new RuntimeException("Error during loading Certificate from bytes!", e);
 357         }
 358     }
 359
 360     private X509Certificate loadCertificateFactory(InputStream in) throws SecurityManagerException {
 361         try {
 362             CertificateFactory factory = CertificateFactory.getInstance("X.509");
 363             return (X509Certificate) factory.generateCertificate(in);
 364         } catch (CertificateException e) {
 365             LOGGER.error("Error during loading Certificate from bytes!", e);
 366             throw new SecurityManagerException("Error during loading Certificate from bytes!", e);
 367         }
 368     }
 369
 370     private PKIXCertPathBuilderResult verifyCertificate(final X509Certificate cert,
 371                                                         final Set<X509Certificate> additionalCerts) throws SecurityManagerException {
 372         if (null == cert) {
 373             LOGGER.error("The certificate is empty!");
 374             throw new SecurityManagerException("The certificate is empty!");
 375         }
 376         if (isExpired(cert)) {
 377             LOGGER.error("The certificate expired on: {}", cert.getNotAfter());
 378             throw new SecurityManagerException("The certificate expired on: " + cert.getNotAfter());
 379         }
 380         if (isSelfSigned(cert)) {
 381             LOGGER.error("The certificate is self-signed.");
 382             throw new SecurityManagerException("The certificate is self-signed.");
 383         }
 384         Set<X509Certificate> trustedRootCerts = new HashSet<>();
 385         Set<X509Certificate> intermediateCerts = new HashSet<>();
 386         for (X509Certificate additionalCert : additionalCerts) {
 387             if (isSelfSigned(additionalCert)) {
 388                 trustedRootCerts.add(additionalCert);
 389             } else {
 390                 intermediateCerts.add(additionalCert);
 391             }
 392         }
 393         try {
 394             return verifyCertificate(cert, trustedRootCerts, intermediateCerts);
 395         } catch (final GeneralSecurityException e) {
 396             LOGGER.error("Failed to verify certificate", e);
 397             throw new SecurityManagerException("Failed to verify certificate", e);
 398         }
 399     }
 400
 401     private PKIXCertPathBuilderResult verifyCertificate(X509Certificate cert, Set<X509Certificate> allTrustedRootCerts,
 402                                                         Set<X509Certificate> allIntermediateCerts) throws GeneralSecurityException {
 403         // Create the selector that specifies the starting certificate
 404         X509CertSelector selector = new X509CertSelector();
 405         selector.setCertificate(cert);
 406         // Create the trust anchors (set of root CA certificates)
 407         Set<TrustAnchor> trustAnchors = new HashSet<>();
 408         for (X509Certificate trustedRootCert : allTrustedRootCerts) {
 409             trustAnchors.add(new TrustAnchor(trustedRootCert, null));
 410         }
 411         // Configure the PKIX certificate builder algorithm parameters
 412         PKIXBuilderParameters pkixParams;
 413         try {
 414             pkixParams = new PKIXBuilderParameters(trustAnchors, selector);
 415         } catch (InvalidAlgorithmParameterException ex) {
 416             LOGGER.error("No root CA has been found for this certificate", ex);
 417             throw new InvalidAlgorithmParameterException("No root CA has been found for this certificate", ex);
 418         }
 419         // Not supporting CRL checks for now
 420         pkixParams.setRevocationEnabled(false);
 421         Set<X509Certificate> certSet = new HashSet<>();
 422         certSet.add(cert);
 423         pkixParams.addCertStore(createCertStore(certSet));
 424         pkixParams.addCertStore(createCertStore(allIntermediateCerts));
 425         pkixParams.addCertStore(createCertStore(allTrustedRootCerts));
 426         CertPathBuilder builder = CertPathBuilder.getInstance(CertPathBuilder.getDefaultType(), BouncyCastleProvider.PROVIDER_NAME);
 427         return (PKIXCertPathBuilderResult) builder.build(pkixParams);
 428     }
 429
 430     private CertStore createCertStore(Set<X509Certificate> certificateSet)
 431         throws InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchProviderException {
 432         return CertStore.getInstance("Collection", new CollectionCertStoreParameters(certificateSet), BouncyCastleProvider.PROVIDER_NAME);
 433     }
 434
 435     private boolean isExpired(X509Certificate cert) {
 436         try {
 437             cert.checkValidity();
 438         } catch (CertificateExpiredException e) {
 439             LOGGER.error(e.getMessage(), e);
 440             return true;
 441         } catch (CertificateNotYetValidException e) {
 442             LOGGER.error(e.getMessage(), e);
 443             return false;
 444         }
 445         return false;
 446     }
 447
 448     private boolean isSelfSigned(X509Certificate cert) {
 449         return cert.getIssuerDN().equals(cert.getSubjectDN());
 450     }
 451
 452     /**
 453      * Initialization on demand class / synchronized singleton pattern.
 454      */
 455     private static class SecurityManagerInstanceHolder {
 456
 457         private static final SecurityManager instance = new SecurityManager();
 458     }
 459 }