1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libcrypto/src/crypto/des/enc_read.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,259 @@
1.4 +/* crypto/des/enc_read.c */
1.5 +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
1.6 + * All rights reserved.
1.7 + *
1.8 + * This package is an SSL implementation written
1.9 + * by Eric Young (eay@cryptsoft.com).
1.10 + * The implementation was written so as to conform with Netscapes SSL.
1.11 + *
1.12 + * This library is free for commercial and non-commercial use as long as
1.13 + * the following conditions are aheared to. The following conditions
1.14 + * apply to all code found in this distribution, be it the RC4, RSA,
1.15 + * lhash, DES, etc., code; not just the SSL code. The SSL documentation
1.16 + * included with this distribution is covered by the same copyright terms
1.17 + * except that the holder is Tim Hudson (tjh@cryptsoft.com).
1.18 + *
1.19 + * Copyright remains Eric Young's, and as such any Copyright notices in
1.20 + * the code are not to be removed.
1.21 + * If this package is used in a product, Eric Young should be given attribution
1.22 + * as the author of the parts of the library used.
1.23 + * This can be in the form of a textual message at program startup or
1.24 + * in documentation (online or textual) provided with the package.
1.25 + *
1.26 + * Redistribution and use in source and binary forms, with or without
1.27 + * modification, are permitted provided that the following conditions
1.28 + * are met:
1.29 + * 1. Redistributions of source code must retain the copyright
1.30 + * notice, this list of conditions and the following disclaimer.
1.31 + * 2. Redistributions in binary form must reproduce the above copyright
1.32 + * notice, this list of conditions and the following disclaimer in the
1.33 + * documentation and/or other materials provided with the distribution.
1.34 + * 3. All advertising materials mentioning features or use of this software
1.35 + * must display the following acknowledgement:
1.36 + * "This product includes cryptographic software written by
1.37 + * Eric Young (eay@cryptsoft.com)"
1.38 + * The word 'cryptographic' can be left out if the rouines from the library
1.39 + * being used are not cryptographic related :-).
1.40 + * 4. If you include any Windows specific code (or a derivative thereof) from
1.41 + * the apps directory (application code) you must include an acknowledgement:
1.42 + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
1.43 + *
1.44 + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
1.45 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.46 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.47 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1.48 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.49 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.50 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.51 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.52 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.53 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.54 + * SUCH DAMAGE.
1.55 + *
1.56 + * The licence and distribution terms for any publically available version or
1.57 + * derivative of this code cannot be changed. i.e. this code cannot simply be
1.58 + * copied and put under another distribution licence
1.59 + * [including the GNU Public Licence.]
1.60 + */
1.61 +/*
1.62 + © Portions copyright (c) 2006 Nokia Corporation. All rights reserved.
1.63 + */
1.64 +
1.65 +#include <stdio.h>
1.66 +#include <errno.h>
1.67 +#include "cryptlib.h"
1.68 +#include "des_locl.h"
1.69 +#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
1.70 +#include "libcrypto_wsd_macros.h"
1.71 +#include "libcrypto_wsd.h"
1.72 +#endif
1.73 +/* This has some uglies in it but it works - even over sockets. */
1.74 +/*extern int errno;*/
1.75 +#ifndef EMULATOR
1.76 +OPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode)=DES_PCBC_MODE;
1.77 +#else
1.78 +#define DES_rw_mode libcrypto_ImpurePtr()->_shadow_DES_rw_mode
1.79 +#endif
1.80 +
1.81 +/*
1.82 + * WARNINGS:
1.83 + *
1.84 + * - The data format used by DES_enc_write() and DES_enc_read()
1.85 + * has a cryptographic weakness: When asked to write more
1.86 + * than MAXWRITE bytes, DES_enc_write will split the data
1.87 + * into several chunks that are all encrypted
1.88 + * using the same IV. So don't use these functions unless you
1.89 + * are sure you know what you do (in which case you might
1.90 + * not want to use them anyway).
1.91 + *
1.92 + * - This code cannot handle non-blocking sockets.
1.93 + *
1.94 + * - This function uses an internal state and thus cannot be
1.95 + * used on multiple files.
1.96 + */
1.97 +
1.98 +#ifdef EMULATOR
1.99 + GET_STATIC_VAR_FROM_TLS(net,enc_read,unsigned char *)
1.100 + #define net (*GET_WSD_VAR_NAME(net,enc_read, s)())
1.101 +
1.102 + GET_STATIC_VAR_FROM_TLS(unnet,enc_read,unsigned char *)
1.103 + #define unnet (*GET_WSD_VAR_NAME(unnet,enc_read, s)())
1.104 +
1.105 + GET_STATIC_VAR_FROM_TLS(unnet_start,enc_read,int)
1.106 + #define unnet_start (*GET_WSD_VAR_NAME(unnet_start,enc_read, s)())
1.107 +
1.108 + GET_STATIC_VAR_FROM_TLS(unnet_left,enc_read,int)
1.109 + #define unnet_left (*GET_WSD_VAR_NAME(unnet_left,enc_read, s)())
1.110 +
1.111 + GET_STATIC_VAR_FROM_TLS(tmpbuf,enc_read,unsigned char *)
1.112 + #define tmpbuf (*GET_WSD_VAR_NAME(tmpbuf,enc_read, s)())
1.113 +
1.114 +
1.115 +#endif
1.116 +
1.117 +
1.118 +EXPORT_C int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched,
1.119 + DES_cblock *iv)
1.120 + {
1.121 + /* data to be unencrypted */
1.122 + int net_num=0;
1.123 +#ifndef EMULATOR
1.124 + static unsigned char *net=NULL;
1.125 +
1.126 + /* extra unencrypted data
1.127 + * for when a block of 100 comes in but is des_read one byte at
1.128 + * a time. */
1.129 + static unsigned char *unnet=NULL;
1.130 + static int unnet_start=0;
1.131 + static int unnet_left=0;
1.132 + static unsigned char *tmpbuf=NULL;
1.133 +#endif
1.134 + int i;
1.135 + long num=0,rnum;
1.136 + unsigned char *p;
1.137 +
1.138 + if (tmpbuf == NULL)
1.139 + {
1.140 + tmpbuf=OPENSSL_malloc(BSIZE);
1.141 + if (tmpbuf == NULL) return(-1);
1.142 + }
1.143 + if (net == NULL)
1.144 + {
1.145 + net=OPENSSL_malloc(BSIZE);
1.146 + if (net == NULL) return(-1);
1.147 + }
1.148 + if (unnet == NULL)
1.149 + {
1.150 + unnet=OPENSSL_malloc(BSIZE);
1.151 + if (unnet == NULL) return(-1);
1.152 + }
1.153 + /* left over data from last decrypt */
1.154 + if (unnet_left != 0)
1.155 + {
1.156 + if (unnet_left < len)
1.157 + {
1.158 + /* we still still need more data but will return
1.159 + * with the number of bytes we have - should always
1.160 + * check the return value */
1.161 + memcpy(buf,&(unnet[unnet_start]),
1.162 + unnet_left);
1.163 + /* eay 26/08/92 I had the next 2 lines
1.164 + * reversed :-( */
1.165 + i=unnet_left;
1.166 + unnet_start=unnet_left=0;
1.167 + }
1.168 + else
1.169 + {
1.170 + memcpy(buf,&(unnet[unnet_start]),len);
1.171 + unnet_start+=len;
1.172 + unnet_left-=len;
1.173 + i=len;
1.174 + }
1.175 + return(i);
1.176 + }
1.177 +
1.178 + /* We need to get more data. */
1.179 + if (len > MAXWRITE) len=MAXWRITE;
1.180 +
1.181 + /* first - get the length */
1.182 + while (net_num < HDRSIZE)
1.183 + {
1.184 + i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
1.185 +#ifdef EINTR
1.186 + if ((i == -1) && (errno == EINTR)) continue;
1.187 +#endif
1.188 + if (i <= 0) return(0);
1.189 + net_num+=i;
1.190 + }
1.191 +
1.192 + /* we now have at net_num bytes in net */
1.193 + p=net;
1.194 + /* num=0; */
1.195 + n2l(p,num);
1.196 + /* num should be rounded up to the next group of eight
1.197 + * we make sure that we have read a multiple of 8 bytes from the net.
1.198 + */
1.199 + if ((num > MAXWRITE) || (num < 0)) /* error */
1.200 + return(-1);
1.201 + rnum=(num < 8)?8:((num+7)/8*8);
1.202 +
1.203 + net_num=0;
1.204 + while (net_num < rnum)
1.205 + {
1.206 + i=read(fd,(void *)&(net[net_num]),rnum-net_num);
1.207 +#ifdef EINTR
1.208 + if ((i == -1) && (errno == EINTR)) continue;
1.209 +#endif
1.210 + if (i <= 0) return(0);
1.211 + net_num+=i;
1.212 + }
1.213 +
1.214 + /* Check if there will be data left over. */
1.215 + if (len < num)
1.216 + {
1.217 + if (DES_rw_mode & DES_PCBC_MODE)
1.218 + DES_pcbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
1.219 + else
1.220 + DES_cbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
1.221 + memcpy(buf,unnet,len);
1.222 + unnet_start=len;
1.223 + unnet_left=num-len;
1.224 +
1.225 + /* The following line is done because we return num
1.226 + * as the number of bytes read. */
1.227 + num=len;
1.228 + }
1.229 + else
1.230 + {
1.231 + /* >output is a multiple of 8 byes, if len < rnum
1.232 + * >we must be careful. The user must be aware that this
1.233 + * >routine will write more bytes than he asked for.
1.234 + * >The length of the buffer must be correct.
1.235 + * FIXED - Should be ok now 18-9-90 - eay */
1.236 + if (len < rnum)
1.237 + {
1.238 +
1.239 + if (DES_rw_mode & DES_PCBC_MODE)
1.240 + DES_pcbc_encrypt(net,tmpbuf,num,sched,iv,
1.241 + DES_DECRYPT);
1.242 + else
1.243 + DES_cbc_encrypt(net,tmpbuf,num,sched,iv,
1.244 + DES_DECRYPT);
1.245 +
1.246 + /* eay 26/08/92 fix a bug that returned more
1.247 + * bytes than you asked for (returned len bytes :-( */
1.248 + memcpy(buf,tmpbuf,num);
1.249 + }
1.250 + else
1.251 + {
1.252 + if (DES_rw_mode & DES_PCBC_MODE)
1.253 + DES_pcbc_encrypt(net,buf,num,sched,iv,
1.254 + DES_DECRYPT);
1.255 + else
1.256 + DES_cbc_encrypt(net,buf,num,sched,iv,
1.257 + DES_DECRYPT);
1.258 + }
1.259 + }
1.260 + return num;
1.261 + }
1.262 +