pgptimebomb.c

PGP8.0源码 请认真阅读您的文件包然后写出其具体功能

/*____________________________________________________________________________
	Copyright (C) 2002 PGP Corporation
	All rights reserved.

	$Id: pgpTimeBomb.c,v 1.3 2002/08/06 20:11:15 dallen Exp $
____________________________________________________________________________*/
#include "pgpConfig.h"
#include "pgpTimeBomb.h"

#if PGP_TIME_BOMB	/* [ */

#include <time.h>
#include "pgpMem.h"

	PGPBoolean
pgpTimeBombHasExpired( void )
{
	time_t		currentTime	= time( NULL );
	time_t		expirationTime;
	struct tm	tm;
	
	pgpAssert( kPGPTimeBombMonth >= 1 && kPGPTimeBombMonth <= 12 );
	pgpAssert( kPGPTimeBombYear >= 1997 );
	pgpAssert( kPGPTimeBombDay >= 0 && kPGPTimeBombDay <= 31 );
	
	pgpClearMemory( &tm, sizeof( tm ) );
	tm.tm_year	= kPGPTimeBombYear - 1900;	/* API requires just "97" */
	tm.tm_mon	= kPGPTimeBombMonth - 1;	/* months are [0,11] */
	tm.tm_mday	= kPGPTimeBombDay;
	
	expirationTime	= mktime( &tm );
	
	return ( currentTime >= expirationTime );
}


#endif	/* ] */


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