Exemple #1
0
  private void tryRsaPkcs15Sig(
      String algorithm,
      byte[] data,
      PrivateKey signingKey,
      PublicKey verifyKey,
      ASN1ObjectIdentifier sigOid,
      ASN1ObjectIdentifier hashOid)
      throws Exception {
    Signature sig;
    byte[] sigBytes;
    sig = Signature.getInstance(algorithm, "BC");

    sig.initSign(signingKey);

    sig.update(data);

    sigBytes = sig.sign();

    sig.initVerify(verifyKey);

    sig.update(data);

    if (!sig.verify(sigBytes)) {
      fail(algorithm + " verification failed");
    }

    Cipher c = Cipher.getInstance("RSA/NONE/PKCS1Padding", "BC");

    c.init(Cipher.DECRYPT_MODE, verifyKey);

    DigestInfo digInfo = DigestInfo.getInstance(c.doFinal(sigBytes));

    isTrue("digest alg not match", digInfo.getAlgorithmId().getAlgorithm().equals(hashOid));

    sig = Signature.getInstance(sigOid.getId(), "BC");

    sig.initSign(signingKey);

    sig.update(data);

    isTrue("sig not matched", Arrays.areEqual(sigBytes, sig.sign()));

    sig.initVerify(verifyKey);

    sig.update(data);

    if (!sig.verify(sigBytes)) {
      fail(algorithm + " oid verification failed");
    }
  }
 public static LogotypeReference getInstance(ASN1Sequence seq) {
   ASN1Sequence refStructHashSeq = null;
   ASN1Sequence refStructURISeq = null;
   if (seq.size() != 2) {
     throw new IllegalArgumentException("size of sequence must be 2 not " + seq.size());
   }
   refStructHashSeq = ASN1Sequence.getInstance(seq.getObjectAt(0));
   refStructURISeq = ASN1Sequence.getInstance(seq.getObjectAt(1));
   DigestInfo[] refStructHash = null;
   DERIA5String[] refStructURI = null;
   {
     Vector<DigestInfo> v = new Vector<DigestInfo>();
     for (int i = 0; i < refStructHashSeq.size(); i++) {
       DigestInfo di = DigestInfo.getInstance(refStructHashSeq.getObjectAt(i));
       v.add(di);
     }
     refStructHash = v.toArray(new DigestInfo[refStructHashSeq.size()]);
   }
   {
     Vector<DERIA5String> v = new Vector<DERIA5String>();
     for (int i = 0; i < refStructURISeq.size(); i++) {
       DERIA5String di = DERIA5String.getInstance(refStructURISeq.getObjectAt(i));
       v.add(di);
     }
     refStructHash = v.toArray(new DigestInfo[refStructURISeq.size()]);
   }
   return new LogotypeReference(refStructHash, refStructURI);
 }
  private DigestInfo derDecode(byte[] encoding) throws IOException, CMSException {
    if (encoding[0] != (DERTags.CONSTRUCTED | DERTags.SEQUENCE)) {
      throw new IOException("not a digest info object");
    }

    ASN1InputStream aIn = new ASN1InputStream(encoding);

    DigestInfo digInfo = new DigestInfo((ASN1Sequence) aIn.readObject());

    // length check to avoid Bleichenbacher vulnerability

    if (digInfo.getEncoded().length != encoding.length) {
      throw new CMSException("malformed RSA signature");
    }

    return digInfo;
  }
  public synchronized String generateSignature(byte[] message) throws Exception {
    // Log.trace("Signed message length is " + message.length);

    try {
      digest.reset();
      cipher.init(true, privateRsaKey);
      digest.update(message, 0, message.length);
      byte[] hash = new byte[digest.getDigestSize()];
      digest.doFinal(hash, 0);
      DigestInfo info = new DigestInfo(new AlgorithmIdentifier(md5, null), hash);
      byte[] bytes = info.getEncoded(ASN1Encoding.DER);
      byte[] signature = cipher.processBlock(bytes, 0, bytes.length);
      return new String(org.bouncycastle.util.encoders.Base64.encode(signature));
    } catch (Exception e) {
      throw new Exception("Ошибка создания подписи:\n" + e.getMessage());
    }
  }
  /** @deprecated */
  private boolean verifyDigest(byte[] digest, PublicKey key, byte[] signature, Provider sigProvider)
      throws NoSuchAlgorithmException, CMSException {
    String encName = CMSSignedHelper.INSTANCE.getEncryptionAlgName(this.getEncryptionAlgOID());

    try {
      if (encName.equals("RSA")) {
        Cipher c =
            CMSEnvelopedHelper.INSTANCE.createAsymmetricCipher("RSA/ECB/PKCS1Padding", sigProvider);

        c.init(Cipher.DECRYPT_MODE, key);

        DigestInfo digInfo = derDecode(c.doFinal(signature));

        if (!digInfo.getAlgorithmId().getObjectId().equals(digestAlgorithm.getObjectId())) {
          return false;
        }

        if (!isNull(digInfo.getAlgorithmId().getParameters())) {
          return false;
        }

        byte[] sigHash = digInfo.getDigest();

        return Arrays.constantTimeAreEqual(digest, sigHash);
      } else if (encName.equals("DSA")) {
        Signature sig = CMSSignedHelper.INSTANCE.getSignatureInstance("NONEwithDSA", sigProvider);

        sig.initVerify(key);

        sig.update(digest);

        return sig.verify(signature);
      } else {
        throw new CMSException("algorithm: " + encName + " not supported in base signatures.");
      }
    } catch (GeneralSecurityException e) {
      throw new CMSException("Exception processing signature: " + e, e);
    } catch (IOException e) {
      throw new CMSException("Exception decoding signature: " + e, e);
    }
  }
 public synchronized void verifySignature(byte[] message, byte[] signature) throws Exception {
   try {
     digest.reset();
     cipher.init(false, publicRsaKey);
     digest.update(message, 0, message.length);
     byte[] hash = new byte[digest.getDigestSize()];
     digest.doFinal(hash, 0);
     DigestInfo info = new DigestInfo(new AlgorithmIdentifier(md5, null), hash);
     byte[] bytes = info.getEncoded(ASN1Encoding.DER);
     byte[] signatureData = org.bouncycastle.util.encoders.Base64.decode(signature);
     byte[] result = cipher.processBlock(signatureData, 0, signatureData.length);
     if ((result == null) || (result.length < hash.length)) {
       throw new Exception("Invalid signature (1)!");
     }
     if (!compareFromTheEnd(hash, result)) {
       throw new Exception("Invalid signature (2)!");
     }
   } catch (Exception e) {
     throw new Exception("Error checking signature:\n" + e.getMessage());
   }
 }
Exemple #7
0
  @Override
  protected void onDocumentSigned(byte[] byteArray) {
    try {
      InputStream inputStream = new ByteArrayInputStream(byteArray);

      PDDocument document = PDDocument.load(inputStream);
      List<PDSignature> signatures = document.getSignatureDictionaries();
      assertEquals(1, signatures.size());

      for (PDSignature pdSignature : signatures) {
        byte[] contents = pdSignature.getContents(byteArray);
        byte[] signedContent = pdSignature.getSignedContent(byteArray);

        logger.info("Byte range : " + Arrays.toString(pdSignature.getByteRange()));

        // IOUtils.write(contents, new FileOutputStream("sig.p7s"));

        ASN1InputStream asn1sInput = new ASN1InputStream(contents);
        ASN1Sequence asn1Seq = (ASN1Sequence) asn1sInput.readObject();

        logger.info("SEQ : " + asn1Seq.toString());

        ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(asn1Seq.getObjectAt(0));
        assertEquals(PKCSObjectIdentifiers.signedData, oid);

        SignedData signedData =
            SignedData.getInstance(DERTaggedObject.getInstance(asn1Seq.getObjectAt(1)).getObject());

        ASN1Set digestAlgorithmSet = signedData.getDigestAlgorithms();
        ASN1ObjectIdentifier oidDigestAlgo =
            ASN1ObjectIdentifier.getInstance(
                ASN1Sequence.getInstance(digestAlgorithmSet.getObjectAt(0)).getObjectAt(0));
        DigestAlgorithm digestAlgorithm = DigestAlgorithm.forOID(oidDigestAlgo.getId());
        logger.info("DIGEST ALGO : " + digestAlgorithm);

        ContentInfo encapContentInfo = signedData.getEncapContentInfo();
        ASN1ObjectIdentifier contentTypeOID = encapContentInfo.getContentType();
        logger.info("ENCAPSULATED CONTENT INFO TYPE : " + contentTypeOID);
        assertEquals(PKCSObjectIdentifiers.data, contentTypeOID);

        ASN1Encodable content = encapContentInfo.getContent();
        logger.info("ENCAPSULATED CONTENT INFO CONTENT : " + content);
        assertNull(content);

        List<X509Certificate> certificates = extractCertificates(signedData);

        ASN1Set signerInfosAsn1 = signedData.getSignerInfos();
        logger.info("SIGNER INFO ASN1 : " + signerInfosAsn1.toString());
        SignerInfo signedInfo =
            SignerInfo.getInstance(ASN1Sequence.getInstance(signerInfosAsn1.getObjectAt(0)));

        ASN1Set authenticatedAttributeSet = signedInfo.getAuthenticatedAttributes();
        logger.info("AUTHENTICATED ATTR : " + authenticatedAttributeSet);

        List<ASN1ObjectIdentifier> attributeOids = new ArrayList<ASN1ObjectIdentifier>();
        for (int i = 0; i < authenticatedAttributeSet.size(); i++) {
          Attribute attribute = Attribute.getInstance(authenticatedAttributeSet.getObjectAt(i));
          attributeOids.add(attribute.getAttrType());
        }
        logger.info("List of OID for Auth Attrb : " + attributeOids);

        Attribute attributeDigest = Attribute.getInstance(authenticatedAttributeSet.getObjectAt(1));
        assertEquals(PKCSObjectIdentifiers.pkcs_9_at_messageDigest, attributeDigest.getAttrType());

        ASN1OctetString asn1ObjString =
            ASN1OctetString.getInstance(attributeDigest.getAttrValues().getObjectAt(0));
        String embeddedDigest = Base64.encode(asn1ObjString.getOctets());
        logger.info("MESSAGE DIGEST : " + embeddedDigest);

        byte[] digestSignedContent = DSSUtils.digest(digestAlgorithm, signedContent);
        String computedDigestSignedContentEncodeBase64 = Base64.encode(digestSignedContent);
        logger.info(
            "COMPUTED DIGEST SIGNED CONTENT BASE64 : " + computedDigestSignedContentEncodeBase64);
        assertEquals(embeddedDigest, computedDigestSignedContentEncodeBase64);

        SignerIdentifier sid = signedInfo.getSID();
        logger.info("SIGNER IDENTIFIER : " + sid.getId());

        IssuerAndSerialNumber issuerAndSerialNumber =
            IssuerAndSerialNumber.getInstance(signedInfo.getSID());
        ASN1Integer signerSerialNumber = issuerAndSerialNumber.getSerialNumber();
        logger.info(
            "ISSUER AND SN : " + issuerAndSerialNumber.getName() + " " + signerSerialNumber);

        BigInteger serial = issuerAndSerialNumber.getSerialNumber().getValue();
        X509Certificate signerCertificate = null;
        for (X509Certificate x509Certificate : certificates) {
          if (serial.equals(x509Certificate.getSerialNumber())) {
            signerCertificate = x509Certificate;
          }
        }
        assertNotNull(signerCertificate);

        String algorithm = signerCertificate.getPublicKey().getAlgorithm();
        EncryptionAlgorithm encryptionAlgorithm = EncryptionAlgorithm.forName(algorithm);

        ASN1OctetString encryptedInfoOctedString = signedInfo.getEncryptedDigest();
        String signatureValue = Hex.toHexString(encryptedInfoOctedString.getOctets());

        logger.info("SIGNATURE VALUE : " + signatureValue);

        Cipher cipher = Cipher.getInstance(encryptionAlgorithm.getName());
        cipher.init(Cipher.DECRYPT_MODE, signerCertificate);
        byte[] decrypted = cipher.doFinal(encryptedInfoOctedString.getOctets());

        ASN1InputStream inputDecrypted = new ASN1InputStream(decrypted);

        ASN1Sequence seqDecrypt = (ASN1Sequence) inputDecrypted.readObject();
        logger.info("DECRYPTED : " + seqDecrypt);

        DigestInfo digestInfo = new DigestInfo(seqDecrypt);
        assertEquals(oidDigestAlgo, digestInfo.getAlgorithmId().getAlgorithm());

        String decryptedDigestEncodeBase64 = Base64.encode(digestInfo.getDigest());
        logger.info("DECRYPTED BASE64 : " + decryptedDigestEncodeBase64);

        byte[] encoded = authenticatedAttributeSet.getEncoded();
        byte[] digest = DSSUtils.digest(digestAlgorithm, encoded);
        String computedDigestFromSignatureEncodeBase64 = Base64.encode(digest);
        logger.info(
            "COMPUTED DIGEST FROM SIGNATURE BASE64 : " + computedDigestFromSignatureEncodeBase64);

        assertEquals(decryptedDigestEncodeBase64, computedDigestFromSignatureEncodeBase64);

        IOUtils.closeQuietly(inputDecrypted);
        IOUtils.closeQuietly(asn1sInput);
      }

      IOUtils.closeQuietly(inputStream);
      document.close();
    } catch (Exception e) {
      logger.error(e.getMessage(), e);
      fail(e.getMessage());
    }
  }
  private boolean doVerify(SignerInformationVerifier verifier) throws CMSException {
    String digestName = CMSSignedHelper.INSTANCE.getDigestAlgName(this.getDigestAlgOID());
    String encName = CMSSignedHelper.INSTANCE.getEncryptionAlgName(this.getEncryptionAlgOID());
    String signatureName = digestName + "with" + encName;

    try {
      if (digestCalculator != null) {
        resultDigest = digestCalculator.getDigest();
      } else {
        DigestCalculator calc = verifier.getDigestCalculator(this.getDigestAlgorithmID());
        if (content != null) {
          OutputStream digOut = calc.getOutputStream();

          content.write(digOut);

          digOut.close();
        } else if (signedAttributeSet == null) {
          // TODO Get rid of this exception and just treat content==null as empty not missing?
          throw new CMSException("data not encapsulated in signature - use detached constructor.");
        }

        resultDigest = calc.getDigest();
      }
    } catch (IOException e) {
      throw new CMSException("can't process mime object to create signature.", e);
    } catch (NoSuchAlgorithmException e) {
      throw new CMSException("can't find algorithm: " + e.getMessage(), e);
    } catch (OperatorCreationException e) {
      throw new CMSException("can't create digest calculator: " + e.getMessage(), e);
    }

    // RFC 3852 11.1 Check the content-type attribute is correct
    {
      DERObject validContentType =
          getSingleValuedSignedAttribute(CMSAttributes.contentType, "content-type");
      if (validContentType == null) {
        if (!isCounterSignature && signedAttributeSet != null) {
          throw new CMSException(
              "The content-type attribute type MUST be present whenever signed attributes are present in signed-data");
        }
      } else {
        if (isCounterSignature) {
          throw new CMSException(
              "[For counter signatures,] the signedAttributes field MUST NOT contain a content-type attribute");
        }

        if (!(validContentType instanceof DERObjectIdentifier)) {
          throw new CMSException(
              "content-type attribute value not of ASN.1 type 'OBJECT IDENTIFIER'");
        }

        DERObjectIdentifier signedContentType = (DERObjectIdentifier) validContentType;

        if (!signedContentType.equals(contentType)) {
          throw new CMSException("content-type attribute value does not match eContentType");
        }
      }
    }

    // RFC 3852 11.2 Check the message-digest attribute is correct
    {
      DERObject validMessageDigest =
          getSingleValuedSignedAttribute(CMSAttributes.messageDigest, "message-digest");
      if (validMessageDigest == null) {
        if (signedAttributeSet != null) {
          throw new CMSException(
              "the message-digest signed attribute type MUST be present when there are any signed attributes present");
        }
      } else {
        if (!(validMessageDigest instanceof ASN1OctetString)) {
          throw new CMSException("message-digest attribute value not of ASN.1 type 'OCTET STRING'");
        }

        ASN1OctetString signedMessageDigest = (ASN1OctetString) validMessageDigest;

        if (!Arrays.constantTimeAreEqual(resultDigest, signedMessageDigest.getOctets())) {
          throw new CMSSignerDigestMismatchException(
              "message-digest attribute value does not match calculated value");
        }
      }
    }

    // RFC 3852 11.4 Validate countersignature attribute(s)
    {
      AttributeTable signedAttrTable = this.getSignedAttributes();
      if (signedAttrTable != null
          && signedAttrTable.getAll(CMSAttributes.counterSignature).size() > 0) {
        throw new CMSException("A countersignature attribute MUST NOT be a signed attribute");
      }

      AttributeTable unsignedAttrTable = this.getUnsignedAttributes();
      if (unsignedAttrTable != null) {
        ASN1EncodableVector csAttrs = unsignedAttrTable.getAll(CMSAttributes.counterSignature);
        for (int i = 0; i < csAttrs.size(); ++i) {
          Attribute csAttr = (Attribute) csAttrs.get(i);
          if (csAttr.getAttrValues().size() < 1) {
            throw new CMSException(
                "A countersignature attribute MUST contain at least one AttributeValue");
          }

          // Note: We don't recursively validate the countersignature value
        }
      }
    }

    try {
      ContentVerifier contentVerifier =
          verifier.getContentVerifier(sigAlgFinder.find(signatureName));
      OutputStream sigOut = contentVerifier.getOutputStream();

      if (signedAttributeSet == null) {
        if (digestCalculator != null) {
          if (contentVerifier instanceof RawContentVerifier) {
            RawContentVerifier rawVerifier = (RawContentVerifier) contentVerifier;

            if (encName.equals("RSA")) {
              DigestInfo digInfo = new DigestInfo(digestAlgorithm, resultDigest);

              return rawVerifier.verify(digInfo.getDEREncoded(), this.getSignature());
            }

            return rawVerifier.verify(resultDigest, this.getSignature());
          }

          throw new CMSException("verifier unable to process raw signature");
        } else if (content != null) {
          // TODO Use raw signature of the hash value instead
          content.write(sigOut);
        }
      } else {
        sigOut.write(this.getEncodedSignedAttributes());
      }

      sigOut.close();

      return contentVerifier.verify(this.getSignature());
    } catch (IOException e) {
      throw new CMSException("can't process mime object to create signature.", e);
    } catch (OperatorCreationException e) {
      throw new CMSException("can't create content verifier: " + e.getMessage(), e);
    }
  }