1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/des/enc_writ.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 <errno.h> 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <time.h> 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdio.h> 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "cryptlib.h" 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "des_locl.h" 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/rand.h> 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * WARNINGS: 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - The data format used by DES_enc_write() and DES_enc_read() 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * has a cryptographic weakness: When asked to write more 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * than MAXWRITE bytes, DES_enc_write will split the data 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * into several chunks that are all encrypted 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * using the same IV. So don't use these functions unless you 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are sure you know what you do (in which case you might 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * not want to use them anyway). 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * - This code cannot handle non-blocking sockets. 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint DES_enc_write(int fd, const void *_buf, int len, 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_key_schedule *sched, DES_cblock *iv) 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 83221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#if defined(OPENSSL_NO_POSIX_IO) 84221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return (-1); 85221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#else 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef _LIBC 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project extern unsigned long time(); 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project extern int write(); 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project const unsigned char *buf=_buf; 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long rnum; 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,j,k,outnum; 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static unsigned char *outbuf=NULL; 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char shortbuf[8]; 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char *p; 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project const unsigned char *cp; 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project static int start=1; 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (outbuf == NULL) 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project outbuf=OPENSSL_malloc(BSIZE+HDRSIZE); 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (outbuf == NULL) return(-1); 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If we are sending less than 8 bytes, the same char will look 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the same if we don't pad it out with random bytes */ 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (start) 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project start=0; 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* lets recurse if we want to send the data in small chunks */ 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len > MAXWRITE) 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project j=0; 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (i=0; i<len; i+=k) 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project k=DES_enc_write(fd,&(buf[i]), 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv); 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (k < 0) 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(k); 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project j+=k; 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(j); 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* write length first */ 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project p=outbuf; 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project l2n(len,p); 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* pad short strings */ 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (len < 8) 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cp=shortbuf; 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(shortbuf,buf,len); 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project RAND_pseudo_bytes(shortbuf+len, 8-len); 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rnum=8; 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cp=buf; 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rnum=((len+7)/8*8); /* round up to nearest eight */ 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (DES_rw_mode & DES_PCBC_MODE) 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv, 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_ENCRYPT); 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv, 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project DES_ENCRYPT); 151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* output */ 153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project outnum=rnum+HDRSIZE; 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (j=0; j<outnum; j+=i) 156656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 157656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* eay 26/08/92 I was not doing writing from where we 158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * got up to. */ 159e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifndef _WIN32 160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=write(fd,(void *)&(outbuf[j]),outnum-j); 161e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#else 162e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu i=_write(fd,(void *)&(outbuf[j]),outnum-j); 163e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i == -1) 165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef EINTR 167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (errno == EINTR) 168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=0; 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* This is really a bad error - very bad 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * It will stuff-up both ends. */ 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(-1); 174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(len); 178221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif /* OPENSSL_NO_POSIX_IO */ 179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 180