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AuthRecord.cc
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AuthRecord.cc
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/***************************************************************************
* *
* _ _____ ____ *
* /\ | | | __ \ /\ | _ \ /\ *
* / \ | | | | | | / \ | |_) | / \ *
* / /\ \ | | | | | | / /\ \ | _ < / /\ \ *
* / ____ \ | |___ | |__| / / ____ \ | |_) / / ____ \ *
* /_/ \_\ | ____| |_____/ /_/ \_\ |____/ /_/ \_\ *
* *
* == {Port Knocking/Single Packet Authorization} Security Suite == *
* *
***************************************************************************
* *
* This file is part of Aldaba Knocking Suite. *
* *
* Copyright (c) 2010, Luis MartinGarcia. (aldabaknocking@gmail.com) *
* *
* Aldaba is free software; you can redistribute it and/or modify it under *
* the terms of the GNU General Public License as published by the Free *
* Software Foundation; Version 2 of the License, with the exceptions, *
* conditions and clarifications described in the file named LICENSE.txt, *
* distributed with Aldaba or available from: *
* <http://www.aldabaknocking.com/LICENSE.txt> *
* *
* Aldaba is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* v2.0 for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with Aldaba; if not, write to the Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
* *
* Please check file LICENSE.txt for the complete version of the license, *
* as this disclaimer does not contain the full information. Also, note *
* that although Aldaba is licensed under the GNU GPL v2.0 license, it may *
* be possible to obtain copies of it under different, less restrictive, *
* alternative licenses. Requests will be studied on a case by case basis. *
* If you wish to obtain Aldaba under a different license, please use the *
* email address shown above. *
* *
***************************************************************************/
#include "AuthRecord.h"
#include "aldaba.h"
#include "output.h"
#include <assert.h>
AuthRecord::AuthRecord(u32 time, u8 *nonce, size_t nonce_len){
assert(nonce!=NULL && nonce_len>0);
this->timestamp=time;
memcpy(this->nonce, nonce, MIN(nonce_len, MAX_AUTH_RECORD_NONCE_LEN));
return;
} /* End of AuthRecord constructor */
AuthRecord::~AuthRecord(){
this->reset();
} /* End of AuthRecord destructor */
/** Clears stored data */
void AuthRecord::reset() {
memset(this->nonce, 0, MAX_AUTH_RECORD_NONCE_LEN);
this->timestamp=0;
} /* End of reset() */
/** Determines if the record has expired, based on current time
* @return true if the record has expired.
* @return false otherwise */
bool AuthRecord::expired(u32 now){
if( (now-MAX_CLOCK_SKEW_SECONDS)< this->timestamp && this->timestamp < (now+MAX_CLOCK_SKEW_SECONDS) )
return false;
else
return true;
} /* End of expired() */
/** Determines if the authentication record matches with the supplied values.
* @return true if the record matches.
* @return false otherwise */
bool AuthRecord::matches(u32 time, u8 *nonce_val, size_t nonce_len){
if(this->timestamp==time){
if(!memcmp(this->nonce, nonce_val, MIN(nonce_len, MAX_AUTH_RECORD_NONCE_LEN))){
return true;
}
}
return false;
} /* End of matches() */
/** Determines if two authentication records are equal. */
bool AuthRecord::operator==(const AuthRecord& other) const {
if( this->timestamp==other.timestamp ){
if(!memcmp(this->nonce, other.nonce, MAX_AUTH_RECORD_NONCE_LEN)){
return true;
}
}
return false;
} /* End of operator== */
/** Returns the record's timestamp */
u32 AuthRecord::getTimestamp(){
return this->timestamp;
}
/** Returns the record's nonce */
u8 *AuthRecord::getNonce(){
return this->nonce;
}