ibrdtn/ibrdtn/security/PayloadIntegrityBlock.h

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#ifndef _PAYLOAD_INTEGRITY_BLOCK_H_
#define _PAYLOAD_INTEGRITY_BLOCK_H_

#include "ibrdtn/security/SecurityBlock.h"
#include "ibrdtn/security/SecurityKey.h"
#include "ibrdtn/data/ExtensionBlock.h"
#include "ibrdtn/data/Bundle.h"
#include <openssl/evp.h>

namespace dtn
{
        namespace security
        {
                class PayloadIntegrityBlock : public SecurityBlock
                {
                        friend class dtn::data::Bundle;
                        public:
                                class Factory : public dtn::data::ExtensionBlock::Factory
                                {
                                public:
                                        Factory() : dtn::data::ExtensionBlock::Factory(PayloadIntegrityBlock::BLOCK_TYPE) {};
                                        virtual ~Factory() {};
                                        virtual dtn::data::Block* create();
                                };

                                static const char BLOCK_TYPE = SecurityBlock::PAYLOAD_INTEGRITY_BLOCK;
                                
                                virtual ~PayloadIntegrityBlock();

                                static void sign(dtn::data::Bundle &bundle, const SecurityKey &key, const dtn::data::EID& destination);

                                static void verify(const dtn::data::Bundle &bundle, const SecurityKey &key);

                                static void strip(dtn::data::Bundle& bundle, const SecurityKey &key, const bool all = false);

                                static void strip(dtn::data::Bundle& bundle);

                                virtual std::istream &deserialize(std::istream &stream, const size_t length);

                        protected:
                                PayloadIntegrityBlock();
                                
                                virtual size_t getSecurityResultSize() const;

                        private:
                                int result_size;

                                static const std::string calcHash(const dtn::data::Bundle &bundle, const SecurityKey &key, PayloadIntegrityBlock& ignore);

                                static void verify(const dtn::data::Bundle& bundle, const SecurityKey &key, const PayloadIntegrityBlock &sb, const bool use_eid = true);

                                void setResultSize(const SecurityKey &key);
                };

                static PayloadIntegrityBlock::Factory __PayloadIntegrityBlockFactory__;
        }
}
#endif /* _PAYLOAD_INTEGRITY_BLOCK_H_ */