1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/des/enc_read.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * All rights reserved. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This package is an SSL implementation written 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * by Eric Young (eay@cryptsoft.com). 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The implementation was written so as to conform with Netscapes SSL. 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This library is free for commercial and non-commercial use as long as 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the following conditions are aheared to. The following conditions 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * apply to all code found in this distribution, be it the RC4, RSA, 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * included with this distribution is covered by the same copyright terms 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright remains Eric Young's, and as such any Copyright notices in 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the code are not to be removed. 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If this package is used in a product, Eric Young should be given attribution 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * as the author of the parts of the library used. 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This can be in the form of a textual message at program startup or 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * in documentation (online or textual) provided with the package. 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the copyright 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in the 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * documentation and/or other materials provided with the distribution. 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this software 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * must display the following acknowledgement: 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes cryptographic software written by 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Eric Young (eay@cryptsoft.com)" 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The word 'cryptographic' can be left out if the rouines from the library 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * being used are not cryptographic related :-). 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. If you include any Windows specific code (or a derivative thereof) from 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the apps directory (application code) you must include an acknowledgement: 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SUCH DAMAGE. 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The licence and distribution terms for any publically available version or 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * derivative of this code cannot be changed. i.e. this code cannot simply be 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * copied and put under another distribution licence 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * [including the GNU Public Licence.] 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdio.h> 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <errno.h> 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "cryptlib.h" 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "des_locl.h" 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* This has some uglies in it but it works - even over sockets. */ 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/*extern int errno;*/ 66221304ee937bc0910948a8be1320cb8cc4eb6d36Brian CarlstromOPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode,DES_PCBC_MODE) 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * WARNINGS: 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - The data format used by DES_enc_write() and DES_enc_read() 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * has a cryptographic weakness: When asked to write more 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * than MAXWRITE bytes, DES_enc_write will split the data 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * into several chunks that are all encrypted 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * using the same IV. So don't use these functions unless you 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are sure you know what you do (in which case you might 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * not want to use them anyway). 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - This code cannot handle non-blocking sockets. 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - This function uses an internal state and thus cannot be 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * used on multiple files. 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched, 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_cblock *iv) 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 90221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#if defined(OPENSSL_NO_POSIX_IO) 91221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return(0); 92221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#else 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* data to be unencrypted */ 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int net_num=0; 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static unsigned char *net=NULL; 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* extra unencrypted data 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for when a block of 100 comes in but is des_read one byte at 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * a time. */ 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static unsigned char *unnet=NULL; 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static int unnet_start=0; 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static int unnet_left=0; 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static unsigned char *tmpbuf=NULL; 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i; 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long num=0,rnum; 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *p; 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (tmpbuf == NULL) 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project tmpbuf=OPENSSL_malloc(BSIZE); 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (tmpbuf == NULL) return(-1); 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (net == NULL) 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project net=OPENSSL_malloc(BSIZE); 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (net == NULL) return(-1); 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (unnet == NULL) 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet=OPENSSL_malloc(BSIZE); 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (unnet == NULL) return(-1); 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* left over data from last decrypt */ 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (unnet_left != 0) 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (unnet_left < len) 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we still still need more data but will return 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * with the number of bytes we have - should always 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * check the return value */ 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(buf,&(unnet[unnet_start]), 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet_left); 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* eay 26/08/92 I had the next 2 lines 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * reversed :-( */ 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=unnet_left; 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet_start=unnet_left=0; 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(buf,&(unnet[unnet_start]),len); 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet_start+=len; 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet_left-=len; 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=len; 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(i); 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* We need to get more data. */ 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len > MAXWRITE) len=MAXWRITE; 149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* first - get the length */ 151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while (net_num < HDRSIZE) 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 153221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef OPENSSL_SYS_WIN32 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num); 155e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#else 156e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu i=_read(fd,(void *)&(net[net_num]),HDRSIZE-net_num); 157e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef EINTR 159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((i == -1) && (errno == EINTR)) continue; 160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) return(0); 162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project net_num+=i; 163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* we now have at net_num bytes in net */ 166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p=net; 167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* num=0; */ 168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n2l(p,num); 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* num should be rounded up to the next group of eight 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * we make sure that we have read a multiple of 8 bytes from the net. 171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((num > MAXWRITE) || (num < 0)) /* error */ 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rnum=(num < 8)?8:((num+7)/8*8); 175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project net_num=0; 177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project while (net_num < rnum) 178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 179221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef OPENSSL_SYS_WIN32 180656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=read(fd,(void *)&(net[net_num]),rnum-net_num); 181221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#else 182221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom i=_read(fd,(void *)&(net[net_num]),rnum-net_num); 183221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif 184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef EINTR 185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if ((i == -1) && (errno == EINTR)) continue; 186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 187656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) return(0); 188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project net_num+=i; 189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Check if there will be data left over. */ 192656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len < num) 193656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (DES_rw_mode & DES_PCBC_MODE) 195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_pcbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT); 196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_cbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT); 198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(buf,unnet,len); 199656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet_start=len; 200656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unnet_left=num-len; 201656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 202656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* The following line is done because we return num 203656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * as the number of bytes read. */ 204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project num=len; 205656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 207656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 208656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* >output is a multiple of 8 byes, if len < rnum 209656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * >we must be careful. The user must be aware that this 210656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * >routine will write more bytes than he asked for. 211656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * >The length of the buffer must be correct. 212656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * FIXED - Should be ok now 18-9-90 - eay */ 213656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len < rnum) 214656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 215656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 216656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (DES_rw_mode & DES_PCBC_MODE) 217656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_pcbc_encrypt(net,tmpbuf,num,sched,iv, 218656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_DECRYPT); 219656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 220656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_cbc_encrypt(net,tmpbuf,num,sched,iv, 221656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_DECRYPT); 222656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 223656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* eay 26/08/92 fix a bug that returned more 224656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * bytes than you asked for (returned len bytes :-( */ 225656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(buf,tmpbuf,num); 226656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 227656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 228656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 229656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (DES_rw_mode & DES_PCBC_MODE) 230656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_pcbc_encrypt(net,buf,num,sched,iv, 231656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_DECRYPT); 232656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 233656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_cbc_encrypt(net,buf,num,sched,iv, 234656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_DECRYPT); 235656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 236656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 237656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return num; 238221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif /* OPENSSL_NO_POSIX_IO */ 239656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 240656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 241