sl@0: /* crypto/des/enc_writ.c */ sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) sl@0: * All rights reserved. sl@0: * sl@0: * This package is an SSL implementation written sl@0: * by Eric Young (eay@cryptsoft.com). sl@0: * The implementation was written so as to conform with Netscapes SSL. sl@0: * sl@0: * This library is free for commercial and non-commercial use as long as sl@0: * the following conditions are aheared to. The following conditions sl@0: * apply to all code found in this distribution, be it the RC4, RSA, sl@0: * lhash, DES, etc., code; not just the SSL code. The SSL documentation sl@0: * included with this distribution is covered by the same copyright terms sl@0: * except that the holder is Tim Hudson (tjh@cryptsoft.com). sl@0: * sl@0: * Copyright remains Eric Young's, and as such any Copyright notices in sl@0: * the code are not to be removed. sl@0: * If this package is used in a product, Eric Young should be given attribution sl@0: * as the author of the parts of the library used. sl@0: * This can be in the form of a textual message at program startup or sl@0: * in documentation (online or textual) provided with the package. sl@0: * sl@0: * Redistribution and use in source and binary forms, with or without sl@0: * modification, are permitted provided that the following conditions sl@0: * are met: sl@0: * 1. Redistributions of source code must retain the copyright sl@0: * notice, this list of conditions and the following disclaimer. sl@0: * 2. Redistributions in binary form must reproduce the above copyright sl@0: * notice, this list of conditions and the following disclaimer in the sl@0: * documentation and/or other materials provided with the distribution. sl@0: * 3. All advertising materials mentioning features or use of this software sl@0: * must display the following acknowledgement: sl@0: * "This product includes cryptographic software written by sl@0: * Eric Young (eay@cryptsoft.com)" sl@0: * The word 'cryptographic' can be left out if the rouines from the library sl@0: * being used are not cryptographic related :-). sl@0: * 4. If you include any Windows specific code (or a derivative thereof) from sl@0: * the apps directory (application code) you must include an acknowledgement: sl@0: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" sl@0: * sl@0: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF sl@0: * SUCH DAMAGE. sl@0: * sl@0: * The licence and distribution terms for any publically available version or sl@0: * derivative of this code cannot be changed. i.e. this code cannot simply be sl@0: * copied and put under another distribution licence sl@0: * [including the GNU Public Licence.] sl@0: */ sl@0: /* sl@0: © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. sl@0: */ sl@0: sl@0: sl@0: #include sl@0: #include sl@0: #include sl@0: #include "cryptlib.h" sl@0: #include "des_locl.h" sl@0: #include sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) sl@0: #include "libcrypto_wsd_macros.h" sl@0: #include "libcrypto_wsd.h" sl@0: #endif sl@0: sl@0: /* sl@0: * WARNINGS: sl@0: * sl@0: * - The data format used by DES_enc_write() and DES_enc_read() sl@0: * has a cryptographic weakness: When asked to write more sl@0: * than MAXWRITE bytes, DES_enc_write will split the data sl@0: * into several chunks that are all encrypted sl@0: * using the same IV. So don't use these functions unless you sl@0: * are sure you know what you do (in which case you might sl@0: * not want to use them anyway). sl@0: * sl@0: * - This code cannot handle non-blocking sockets. sl@0: */ sl@0: sl@0: sl@0: sl@0: #ifdef EMULATOR sl@0: GET_STATIC_VAR_FROM_TLS(outbuf,enc_write,unsigned char *) sl@0: #define outbuf (*GET_WSD_VAR_NAME(outbuf,enc_write, s)()) sl@0: sl@0: GET_STATIC_VAR_FROM_TLS(start,enc_write,int) sl@0: #define start (*GET_WSD_VAR_NAME(start,enc_write, s)()) sl@0: #define DES_rw_mode libcrypto_ImpurePtr()->_shadow_DES_rw_mode sl@0: #endif sl@0: sl@0: EXPORT_C int DES_enc_write(int fd, const void *_buf, int len, sl@0: DES_key_schedule *sched, DES_cblock *iv) sl@0: { sl@0: #ifdef _LIBC sl@0: extern unsigned long time(); sl@0: extern int write(); sl@0: #endif sl@0: #ifndef EMULATOR sl@0: const unsigned char *buf=_buf; sl@0: #else sl@0: const unsigned char *const buf=_buf; sl@0: #endif sl@0: long rnum; sl@0: int i,j,k,outnum; sl@0: #ifndef EMULATOR sl@0: static unsigned char *outbuf=NULL; sl@0: #endif sl@0: unsigned char shortbuf[8]; sl@0: unsigned char *p; sl@0: const unsigned char *cp; sl@0: #ifndef EMULATOR sl@0: static int start=1; sl@0: #endif sl@0: sl@0: if (outbuf == NULL) sl@0: { sl@0: outbuf=OPENSSL_malloc(BSIZE+HDRSIZE); sl@0: if (outbuf == NULL) return(-1); sl@0: } sl@0: /* If we are sending less than 8 bytes, the same char will look sl@0: * the same if we don't pad it out with random bytes */ sl@0: if (start) sl@0: { sl@0: start=0; sl@0: } sl@0: sl@0: /* lets recurse if we want to send the data in small chunks */ sl@0: if (len > MAXWRITE) sl@0: { sl@0: j=0; sl@0: for (i=0; i MAXWRITE)?MAXWRITE:(len-i),sched,iv); sl@0: if (k < 0) sl@0: return(k); sl@0: else sl@0: j+=k; sl@0: } sl@0: return(j); sl@0: } sl@0: sl@0: /* write length first */ sl@0: p=outbuf; sl@0: l2n(len,p); sl@0: sl@0: /* pad short strings */ sl@0: if (len < 8) sl@0: { sl@0: cp=shortbuf; sl@0: memcpy(shortbuf,buf,len); sl@0: RAND_pseudo_bytes(shortbuf+len, 8-len); sl@0: rnum=8; sl@0: } sl@0: else sl@0: { sl@0: cp=buf; sl@0: rnum=((len+7)/8*8); /* round up to nearest eight */ sl@0: } sl@0: sl@0: if (DES_rw_mode & DES_PCBC_MODE) sl@0: DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv, sl@0: DES_ENCRYPT); sl@0: else sl@0: DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv, sl@0: DES_ENCRYPT); sl@0: sl@0: /* output */ sl@0: outnum=rnum+HDRSIZE; sl@0: sl@0: for (j=0; j