signed.h

包含哈希,对称以及非对称的经典算法 包含经典事例

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#pragma ident "@(#)Signed.h	1.5 96/01/29 Sun Microsystems"

#ifndef SIGNED_H
#define SIGNED_H

#include "X509Cert.h"

// Base class for deriving objects that are digitally signed
// and encoded in ASN.1 according to the X.509 SIGNED macro.
// "Pure" base class; cannot be instantiated.

class Signed {
 protected:
	Bstream signature;
	AlgId	sigalgid;
	Bstream input;
	Bstream encoded_signed;	// ASN.1 encoding of an X.509 SIGNED object.
				// This contains the signature, input and 
				// sigalgid per the SIGNED macro.
 public:
	// Constructors & Destructors
	Signed();
	Signed(const Bstream&);			// Supply a signed object
	virtual ~Signed();
	Signed(const Signed& );
	Signed& operator =(const Signed &);
	// Member functions and operators
	virtual decode(const Bstream&);		// Supply a signed object
	virtual Bstream sign(const Bstream&,  // tobesigned, key and algid.
		       const Bstream&, const AlgId&);
						   // returns encoded_signed
	virtual VerifyResult verify(const PubKey&) const;
	virtual Bstream getsignature() const;
	virtual Bstream getinput() const;
	virtual Bstream getSigned() const;
	virtual AlgId getsigalgid() const;
	virtual Bstream encode() = 0;		// derived-class specific
};

extern Bstream
asn1_der_encode_signed(const Bstream&, const AlgId&, const Bstream&);

extern int
asn1_der_decode_signed(Bstream&, Bstream&, AlgId&, Bstream&);

#endif SIGNED_H