QTfrontend/rndstr.cpp
changeset 21 dff476dcaaa3
child 33 d6363050cad0
equal deleted inserted replaced
20:ccd2c45f043d 21:dff476dcaaa3
       
     1 /*
       
     2  * Hedgewars, a worms-like game
       
     3  * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>
       
     4  *
       
     5  * Distributed under the terms of the BSD-modified licence:
       
     6  *
       
     7  * Permission is hereby granted, free of charge, to any person obtaining a copy
       
     8  * of this software and associated documentation files (the "Software"), to deal
       
     9  * with the Software without restriction, including without limitation the
       
    10  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
       
    11  * sell copies of the Software, and to permit persons to whom the Software is
       
    12  * furnished to do so, subject to the following conditions:
       
    13  *
       
    14  * 1. Redistributions of source code must retain the above copyright notice,
       
    15  *    this list of conditions and the following disclaimer.
       
    16  * 2. Redistributions in binary form must reproduce the above copyright notice,
       
    17  *    this list of conditions and the following disclaimer in the documentation
       
    18  *    and/or other materials provided with the distribution.
       
    19  * 3. The name of the author may not be used to endorse or promote products
       
    20  *    derived from this software without specific prior written permission.
       
    21  *
       
    22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
       
    23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
       
    24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
       
    25  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
       
    26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
       
    27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
       
    28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
       
    29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
       
    30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
       
    31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
       
    32  */
       
    33 
       
    34 #include <QDateTime>
       
    35 #include "rndstr.h"
       
    36 
       
    37 const char * letters = "qwertyuiopasdfghjklzxcvbnm" \
       
    38                        "QWERTYUIOPASDFGHJKLZXCVBNM" \
       
    39                        "0123456789";
       
    40 const quint8 letterscnt = 62;
       
    41 
       
    42 const char * upd = "/hw!/";
       
    43 const quint8 updcnt = 5;
       
    44 
       
    45 RNDStr::RNDStr()
       
    46 {
       
    47 	SHA1Init(&ctx);
       
    48 	QDateTime now = QDateTime::currentDateTime();
       
    49 	QDateTime zero;
       
    50 	int secs = now.secsTo(zero);
       
    51 	SHA1Update(&ctx, (quint8 *)&secs, sizeof(int));
       
    52 }
       
    53 	
       
    54 void RNDStr::GenRNDStr(QString & str, quint32 len)
       
    55 {
       
    56 	str = "";
       
    57 	sha1_ctxt tmpctx;
       
    58 	caddr_t digest;
       
    59 	for(quint32 i = 0; i < len; i++)
       
    60 	{
       
    61 		SHA1Update(&ctx, (quint8 *)upd, updcnt);
       
    62 		qMemCopy(&tmpctx, &ctx, sizeof(sha1_ctxt));
       
    63 		SHA1Final(digest, &tmpctx);
       
    64 		int index = (digest[3] + digest[11] + digest[17]) % letterscnt;
       
    65 		str += letters[index];
       
    66 	}
       
    67 }