EncryptionManager.hxx

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#if !defined(RESIP_ENCRYPTIONMANAGER_HXX)
#define RESIP_ENCRYPTIONMANAGER_HXX

#include <memory>

#if defined(HAVE_CONFIG_H)
  #include "config.h"
#endif

#include "rutil/SharedPtr.hxx"
#include "rutil/Data.hxx"
#include "rutil/BaseException.hxx"
#include "resip/stack/SipMessage.hxx"
#include "resip/stack/Contents.hxx"
#include "resip/dum/DialogUsageManager.hxx"
#include "resip/stack/Helper.hxx"
#include "resip/dum/CertMessage.hxx"
#include "resip/dum/RemoteCertStore.hxx"
#include "resip/dum/DumFeature.hxx"
#include "resip/stack/InvalidContents.hxx"

namespace resip
{
class Security;

class EncryptionManager : public DumFeature
{
   public:
      class Exception : public BaseException
      {
         public:
            Exception(const Data& msg, const Data& file, const int line);
            const char* name() const { return "EncryptionManagerException"; }
      };

      EncryptionManager(DialogUsageManager& dum, TargetCommand::Target& target);
      virtual ~EncryptionManager();
      void setRemoteCertStore(std::auto_ptr<RemoteCertStore> store);
      virtual DumFeature::ProcessingResult process(Message* msg);

   private:

      typedef enum
      {
         Pending,
         Complete
      } Result;

      EncryptionManager::Result processCertMessage(CertMessage* cert);
      Contents* sign(SharedPtr<SipMessage> msg, const Data& senderAor, bool* noCerts);
      Contents* encrypt(SharedPtr<SipMessage> msg, const Data& recipientAor, bool* noCerts);
      Contents* signAndEncrypt(SharedPtr<SipMessage> msg, const Data& senderAor, const Data& recipientAor, bool* noCerts);
      bool decrypt(SipMessage* msg);

      class Request
      {
         public:
            Request(DialogUsageManager& dum, RemoteCertStore* store, SharedPtr<SipMessage> msg, DumFeature& feature);
            virtual ~Request();
            virtual Result received(bool success, MessageId::Type type, const Data& aor, const Data& data) = 0;
            Data getId() const { return mMsgToEncrypt->getTransactionId(); }            
            //void setTaken() { mTaken = true; }
            //void handleInvalidContents(SipMessage*, const Data& originalBody, const Mime& originalType);

         protected:
            DialogUsageManager& mDum;
            RemoteCertStore* mStore;
            SharedPtr<SipMessage> mMsgToEncrypt; // initial message.
            int mPendingRequests;
            DumFeature& mFeature;
            //bool mTaken;

            void response415();
      };

      class Sign : public Request
      {
         public:
            Sign(DialogUsageManager& dum, RemoteCertStore* store, SharedPtr<SipMessage> msg, const Data& senderAor, DumFeature& feature);
            virtual ~Sign();
            Result received(bool success, MessageId::Type type, const Data& aor, const Data& data);
            bool sign(Contents**, bool* noCerts);

         protected:
            Data mSenderAor;
      };

      class Encrypt : public Request
      {
         public:
            Encrypt(DialogUsageManager& dum, RemoteCertStore* store, SharedPtr<SipMessage> msg, const Data& recipientAor, DumFeature& feature);
            virtual ~Encrypt();
            Result received(bool success, MessageId::Type type, const Data& aor, const Data& data);
            bool encrypt(Contents**, bool* noCerts);

         protected:
            Data mRecipientAor;
      };

      class SignAndEncrypt : public Request
      {
         public:
            SignAndEncrypt(DialogUsageManager& dum, RemoteCertStore* store, SharedPtr<SipMessage> msg,  const Data& senderAor, const Data& recipientAor, DumFeature& feature);
            ~SignAndEncrypt();
            Result received(bool success, MessageId::Type type, const Data& aor, const Data& data);
            bool signAndEncrypt(Contents**, bool* noCerts);

         protected:
            Data mSenderAor;
            Data mRecipientAor;

         private:
            Contents* doWork();
      };

      class Decrypt : public Request
      {
         public:
            Decrypt(DialogUsageManager& dum, RemoteCertStore* store, SipMessage* msg, DumFeature& feature);
            virtual ~Decrypt();
            Result received(bool success, MessageId::Type type, const Data& aor, const Data& data);
            bool decrypt(Helper::ContentsSecAttrs& csa);
            const Mime& getOriginalContentsType() const { return mOriginalMsgContentsType; }
            const Data& getOriginalContents() const { return mOriginalMsgContents; }
            void handleInvalidContents();
            Data getId() const { return mMsgToDecrypt->getTransactionId(); }

         private:
            bool isEncrypted();
            bool isSigned(bool noDecryptionKey);
            bool isEncryptedRecurse(Contents**);
            bool isSignedRecurse(Contents**, const Data& decryptorAor, bool noDecryptionKey);
            Helper::ContentsSecAttrs getContents(SipMessage* msg, Security& security, bool noDecryption);
            Contents* getContentsRecurse(Contents**, Security&, bool, SecurityAttributes* attr);
            InvalidContents* createInvalidContents(Contents*);
            bool isMultipart(Contents*);
            Data mDecryptor;
            Data mSigner;
            Data mOriginalMsgContents;
            Mime mOriginalMsgContentsType;
            bool mIsEncrypted; // the whole body is encrypted in original message.
            SipMessage* mMsgToDecrypt; // original messge.
            bool mMessageTaken;
 };

      std::auto_ptr<RemoteCertStore> mRemoteCertStore;

      typedef std::list<Request*> RequestList;
      RequestList mRequests;
};

}

#endif

/* ====================================================================
 * The Vovida Software License, Version 1.0 
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