weakkey.h

伯克利做的SFTP安全文件传输协议

//  $Archive:: /STP/SafeTP/weakkey.h                                  $
//     $Date: 1999/07/14 13:16:47 $
// $Revision: 1.5 $
// Description: Key strength utilities    
// Copyright 1999, Dan Bonachea, Scott McPeak  Terms of use are as specified in license.txt.

#ifndef _WEAKKEY_H
#define _WEAKKEY_H
 

#include "selgamal.h"    // ElGamal*

// weak keys are used as a "better than nothing" approach when a user bypasses
// the entropy gathering step during key generation, or skips key generation alltogether
// we use a flag to keep track of the "strength" of our key

enum KeyStrength { KS_UNKNOWN = -1, KS_WEAK = 0, KS_STRONG };

// sets the current key strength
int SetKeyStrength(KeyStrength ks, char* keydirname = "ElGamal/", bool forceProtected=false);

// gets the current key strength
KeyStrength GetKeyStrength(char* keydirname = "ElGamal/", bool forceProtected=false) ;

// generate a weak key and mark it as such
// the random seed must be loaded before this function is called
int GenerateWeakKey(char const * const * ElGamalParams = ElGamal_1024bit_parameters, char* keydirname = "ElGamal/") ;

int SetKeyTimeStamp(char* keydirname = "ElGamal/", bool forceProtected=false);

#endif // _WEAKKEY_H