118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
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* (C) Copyright 2007-2013
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Jerry Wang <wangflord@allwinnertech.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include "twofish.h"
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#include "twofish_new.h"
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//------------------------------------------------------------------------------------------------------------
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//
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//------------------------------------------------------------------------------------------------------------
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//typedef void * HTF;
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#define HTF_MAGIC "TFMG"
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TWI twi_org;
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//------------------------------------------------------------------------------------------------------------
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//
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//------------------------------------------------------------------------------------------------------------
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HTF TFInitial(uint * key, uint keylen)
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{
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TWI *twi = &twi_org;
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if (NULL == key)
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return NULL;
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if (0 != (keylen %4))
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return NULL;
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switch (keylen)
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{
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case KEY_LEN_128_BIT:// (128 / 8) //128 bit
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break;
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case KEY_LEN_192_BIT:// (192 / 8) //192 bit
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break;
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case KEY_LEN_256_BIT:// (256 / 8) //256 bit
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break;
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default:
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return NULL;
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}
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memset((void *)twi, 0, sizeof(TWI));
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twofish_new_set_key(twi, (uint *)key, keylen);
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return twi;
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}
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//------------------------------------------------------------------------------------------------------------
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//
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//------------------------------------------------------------------------------------------------------------
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__u32 TFDecode(HTF hTF, void * ibuf, uint len, void * obuf)
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{
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TWI *twi = (TWI *)hTF;
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//decode data
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uint left_len = len;
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uint this_len = 0;
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uint offset_len = 0;
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unsigned char *iaddr, *oaddr;
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iaddr = (unsigned char *)ibuf;
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oaddr = (unsigned char *)obuf;
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//逐个分组进行处理
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while(left_len > 0)
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{
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this_len = (left_len > TF_SIZE)? (TF_SIZE) : (left_len);
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twofish_new_decrypt(twi, (uint *)(iaddr + offset_len), (uint *)(oaddr + offset_len));
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offset_len += this_len;
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left_len -= this_len;
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}
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return 0;
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}
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//------------------------------------------------------------------------------------------------------------
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//
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//------------------------------------------------------------------------------------------------------------
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__u32 TFUnInitial(HTF hTF)
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{
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uint ret = 0;
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TWI *twi = (TWI *)hTF;
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if (NULL == twi)
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return __LINE__;
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memset(twi, 0, sizeof(TWI));
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twi = NULL;
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return ret;
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}
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