Program: 80689
Project: 80689
Buggy source:
private static String decryptAndVerify(KonMessage message,PersonalKey myKey,PGPPublicKey senderKey){
  String encryptedContent=message.getContent().getEncryptedContent();
  byte[] encryptedData=Base64.decode(encryptedContent);
  PGPObjectFactory pgpFactory=new PGPObjectFactory(encryptedData);
  ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
  try {
    Object o=pgpFactory.nextObject();
    if (!(o instanceof PGPEncryptedDataList)) {
      o=pgpFactory.nextObject();
    }
    if (!(o instanceof PGPEncryptedDataList)) {
      LOGGER.warning("String_Node_Str");
      message.addSecurityError(Error.INVALID_DATA);
      return null;
    }
    PGPEncryptedDataList encDataList=(PGPEncryptedDataList)o;
    Iterator<?> it=encDataList.getEncryptedDataObjects();
    PGPPrivateKey sKey=null;
    PGPPublicKeyEncryptedData pbe=null;
    long ourKeyID=myKey.getEncryptKeyPair().getPrivateKey().getKeyID();
    while (sKey == null && it.hasNext()) {
      Object i=it.next();
      if (!(i instanceof PGPPublicKeyEncryptedData))       continue;
      pbe=(PGPPublicKeyEncryptedData)it.next();
      if (pbe.getKeyID() == ourKeyID)       sKey=myKey.getEncryptKeyPair().getPrivateKey();
    }
    if (sKey == null || pbe == null) {
      LOGGER.warning("String_Node_Str");
      message.addSecurityError(Error.INVALID_PRIVATE_KEY);
      return null;
    }
    InputStream clear=pbe.getDataStream(new BcPublicKeyDataDecryptorFactory(sKey));
    PGPObjectFactory plainFactory=new PGPObjectFactory(clear);
    Object object=plainFactory.nextObject();
    if (!(object instanceof PGPCompressedData)) {
      LOGGER.warning("String_Node_Str");
      message.addSecurityError(Error.INVALID_DATA);
      return null;
    }
    PGPCompressedData cData=(PGPCompressedData)object;
    PGPObjectFactory pgpFact=new PGPObjectFactory(cData.getDataStream());
    object=pgpFact.nextObject();
    PGPOnePassSignature ops=null;
    if (object instanceof PGPOnePassSignatureList) {
      message.setSigning(Signing.SIGNED);
      ops=((PGPOnePassSignatureList)object).get(0);
      ops.init(new BcPGPContentVerifierBuilderProvider(),senderKey);
      object=pgpFact.nextObject();
    }
 else {
      LOGGER.warning("String_Node_Str");
      message.setSigning(Signing.NOT);
    }
    if (!(object instanceof PGPLiteralData)) {
      LOGGER.warning("String_Node_Str" + object.getClass().getName());
      message.addSecurityError(Error.INVALID_DATA);
      return null;
    }
    PGPLiteralData ld=(PGPLiteralData)object;
    InputStream unc=ld.getInputStream();
    int ch;
    while ((ch=unc.read()) >= 0) {
      outputStream.write(ch);
      if (ops != null)       try {
        ops.update((byte)ch);
      }
 catch (      SignatureException ex) {
        LOGGER.log(Level.WARNING,"String_Node_Str",ex);
      }
    }
    if (ops != null) {
      object=pgpFact.nextObject();
      if (!(object instanceof PGPSignatureList)) {
        LOGGER.warning("String_Node_Str");
        message.addSecurityError(Error.INVALID_SIGNATURE_DATA);
      }
 else {
        PGPSignature signature=((PGPSignatureList)object).get(0);
        boolean verified=false;
        try {
          verified=ops.verify(signature);
        }
 catch (        SignatureException ex) {
          LOGGER.log(Level.WARNING,"String_Node_Str",ex);
        }
        if (verified) {
          message.setSigning(Signing.VERIFIED);
        }
 else {
          LOGGER.warning("String_Node_Str");
          message.addSecurityError(Error.INVALID_SIGNATURE);
        }
      }
    }
    if (pbe.isIntegrityProtected()) {
      if (!pbe.verify()) {
        LOGGER.warning("String_Node_Str");
        message.addSecurityError(Error.INVALID_INTEGRITY);
      }
    }
 else {
      LOGGER.warning("String_Node_Str");
    }
  }
 catch (  IOException|PGPException ex) {
    LOGGER.log(Level.WARNING,"String_Node_Str",ex);
    message.addSecurityError(Error.UNKNOWN_ERROR);
  }
  return outputStream.toString();
}

Fixed version (ground truth):
private static String decryptAndVerify(KonMessage message,PersonalKey myKey,PGPPublicKey senderKey){
  String encryptedContent=message.getContent().getEncryptedContent();
  byte[] encryptedData=Base64.decode(encryptedContent);
  PGPObjectFactory pgpFactory=new PGPObjectFactory(encryptedData);
  ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
  try {
    Object o=pgpFactory.nextObject();
    if (!(o instanceof PGPEncryptedDataList)) {
      o=pgpFactory.nextObject();
    }
    if (!(o instanceof PGPEncryptedDataList)) {
      LOGGER.warning("String_Node_Str");
      message.addSecurityError(Error.INVALID_DATA);
      return null;
    }
    PGPEncryptedDataList encDataList=(PGPEncryptedDataList)o;
    Iterator<?> it=encDataList.getEncryptedDataObjects();
    PGPPrivateKey sKey=null;
    PGPPublicKeyEncryptedData pbe=null;
    long ourKeyID=myKey.getEncryptKeyPair().getPrivateKey().getKeyID();
    while (sKey == null && it.hasNext()) {
      Object i=it.next();
      if (!(i instanceof PGPPublicKeyEncryptedData))       continue;
      pbe=(PGPPublicKeyEncryptedData)i;
      if (pbe.getKeyID() == ourKeyID)       sKey=myKey.getEncryptKeyPair().getPrivateKey();
    }
    if (sKey == null || pbe == null) {
      LOGGER.warning("String_Node_Str");
      message.addSecurityError(Error.INVALID_PRIVATE_KEY);
      return null;
    }
    InputStream clear=pbe.getDataStream(new BcPublicKeyDataDecryptorFactory(sKey));
    PGPObjectFactory plainFactory=new PGPObjectFactory(clear);
    Object object=plainFactory.nextObject();
    if (!(object instanceof PGPCompressedData)) {
      LOGGER.warning("String_Node_Str");
      message.addSecurityError(Error.INVALID_DATA);
      return null;
    }
    PGPCompressedData cData=(PGPCompressedData)object;
    PGPObjectFactory pgpFact=new PGPObjectFactory(cData.getDataStream());
    object=pgpFact.nextObject();
    PGPOnePassSignature ops=null;
    if (object instanceof PGPOnePassSignatureList) {
      message.setSigning(Signing.SIGNED);
      ops=((PGPOnePassSignatureList)object).get(0);
      ops.init(new BcPGPContentVerifierBuilderProvider(),senderKey);
      object=pgpFact.nextObject();
    }
 else {
      LOGGER.warning("String_Node_Str");
      message.setSigning(Signing.NOT);
    }
    if (!(object instanceof PGPLiteralData)) {
      LOGGER.warning("String_Node_Str" + object.getClass().getName());
      message.addSecurityError(Error.INVALID_DATA);
      return null;
    }
    PGPLiteralData ld=(PGPLiteralData)object;
    InputStream unc=ld.getInputStream();
    int ch;
    while ((ch=unc.read()) >= 0) {
      outputStream.write(ch);
      if (ops != null)       try {
        ops.update((byte)ch);
      }
 catch (      SignatureException ex) {
        LOGGER.log(Level.WARNING,"String_Node_Str",ex);
      }
    }
    if (ops != null) {
      object=pgpFact.nextObject();
      if (!(object instanceof PGPSignatureList)) {
        LOGGER.warning("String_Node_Str");
        message.addSecurityError(Error.INVALID_SIGNATURE_DATA);
      }
 else {
        PGPSignature signature=((PGPSignatureList)object).get(0);
        boolean verified=false;
        try {
          verified=ops.verify(signature);
        }
 catch (        SignatureException ex) {
          LOGGER.log(Level.WARNING,"String_Node_Str",ex);
        }
        if (verified) {
          message.setSigning(Signing.VERIFIED);
        }
 else {
          LOGGER.warning("String_Node_Str");
          message.addSecurityError(Error.INVALID_SIGNATURE);
        }
      }
    }
    if (pbe.isIntegrityProtected()) {
      if (!pbe.verify()) {
        LOGGER.warning("String_Node_Str");
        message.addSecurityError(Error.INVALID_INTEGRITY);
      }
    }
 else {
      LOGGER.warning("String_Node_Str");
    }
  }
 catch (  IOException|PGPException ex) {
    LOGGER.log(Level.WARNING,"String_Node_Str",ex);
    message.addSecurityError(Error.UNKNOWN_ERROR);
  }
  return outputStream.toString();
}