diff options
Diffstat (limited to 'secure/lib/libdes/enc_read.c')
| -rw-r--r-- | secure/lib/libdes/enc_read.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/secure/lib/libdes/enc_read.c b/secure/lib/libdes/enc_read.c deleted file mode 100644 index 11a6c5a82544..000000000000 --- a/secure/lib/libdes/enc_read.c +++ /dev/null @@ -1,189 +0,0 @@ -/* lib/des/enc_read.c */ -/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au) - * All rights reserved. - * - * This file is part of an SSL implementation written - * by Eric Young (eay@mincom.oz.au). - * The implementation was written so as to conform with Netscapes SSL - * specification. This library and applications are - * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE - * as long as the following conditions are aheared to. - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. If this code is used in a product, - * Eric Young should be given attribution as the author of the parts used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Eric Young (eay@mincom.oz.au) - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ - -#include <stdio.h> -#include <errno.h> -#include "des_locl.h" - -/* This has some uglies in it but it works - even over sockets. */ -extern int errno; -int des_rw_mode=DES_PCBC_MODE; - -int des_enc_read(fd, buf, len, sched, iv) -int fd; -char *buf; -int len; -des_key_schedule sched; -des_cblock (*iv); - { - /* data to be unencrypted */ - int net_num=0; - unsigned char net[BSIZE]; - /* extra unencrypted data - * for when a block of 100 comes in but is des_read one byte at - * a time. */ - static char unnet[BSIZE]; - static int unnet_start=0; - static int unnet_left=0; - int i; - long num=0,rnum; - unsigned char *p; - - /* left over data from last decrypt */ - if (unnet_left != 0) - { - if (unnet_left < len) - { - /* we still still need more data but will return - * with the number of bytes we have - should always - * check the return value */ - memcpy(buf,&(unnet[unnet_start]), - (unsigned int)unnet_left); - /* eay 26/08/92 I had the next 2 lines - * reversed :-( */ - i=unnet_left; - unnet_start=unnet_left=0; - } - else - { - memcpy(buf,&(unnet[unnet_start]),(unsigned int)len); - unnet_start+=len; - unnet_left-=len; - i=len; - } - return(i); - } - - /* We need to get more data. */ - if (len > MAXWRITE) len=MAXWRITE; - - /* first - get the length */ - net_num=0; - while (net_num < HDRSIZE) - { - i=read(fd,&(net[net_num]),(unsigned int)HDRSIZE-net_num); - if ((i == -1) && (errno == EINTR)) continue; - if (i <= 0) return(0); - net_num+=i; - } - - /* we now have at net_num bytes in net */ - p=net; - num=0; - n2l(p,num); - /* num should be rounded up to the next group of eight - * we make sure that we have read a multiple of 8 bytes from the net. - */ - if ((num > MAXWRITE) || (num < 0)) /* error */ - return(-1); - rnum=(num < 8)?8:((num+7)/8*8); - - net_num=0; - while (net_num < rnum) - { - i=read(fd,&(net[net_num]),(unsigned int)rnum-net_num); - if ((i == -1) && (errno == EINTR)) continue; - if (i <= 0) return(0); - net_num+=i; - } - - /* Check if there will be data left over. */ - if (len < num) - { - if (des_rw_mode & DES_PCBC_MODE) - pcbc_encrypt((des_cblock *)net,(des_cblock *)unnet, - num,sched,iv,DES_DECRYPT); - else - cbc_encrypt((des_cblock *)net,(des_cblock *)unnet, - num,sched,iv,DES_DECRYPT); - memcpy(buf,unnet,(unsigned int)len); - unnet_start=len; - unnet_left=num-len; - - /* The following line is done because we return num - * as the number of bytes read. */ - num=len; - } - else - { - /* >output is a multiple of 8 byes, if len < rnum - * >we must be careful. The user must be aware that this - * >routine will write more bytes than he asked for. - * >The length of the buffer must be correct. - * FIXED - Should be ok now 18-9-90 - eay */ - if (len < rnum) - { - char tmpbuf[BSIZE]; - - if (des_rw_mode & DES_PCBC_MODE) - pcbc_encrypt((des_cblock *)net, - (des_cblock *)tmpbuf, - num,sched,iv,DES_DECRYPT); - else - cbc_encrypt((des_cblock *)net, - (des_cblock *)tmpbuf, - num,sched,iv,DES_DECRYPT); - - /* eay 26/08/92 fix a bug that returned more - * bytes than you asked for (returned len bytes :-( */ - memcpy(buf,tmpbuf,(unsigned int)num); - } - else - { - if (des_rw_mode & DES_PCBC_MODE) - pcbc_encrypt((des_cblock *)net, - (des_cblock *)buf,num,sched,iv, - DES_DECRYPT); - else - cbc_encrypt((des_cblock *)net, - (des_cblock *)buf,num,sched,iv, - DES_DECRYPT); - } - } - return(num); - } - |