+++ /dev/null
-/* crypto/des/enc_writ.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library 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 cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * 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 <errno.h>
-#include <time.h>
-#include <stdio.h>
-#include "cryptlib.h"
-#include "des_locl.h"
-#include <openssl/rand.h>
-
-/*
- * WARNINGS:
- *
- * - The data format used by DES_enc_write() and DES_enc_read()
- * has a cryptographic weakness: When asked to write more
- * than MAXWRITE bytes, DES_enc_write will split the data
- * into several chunks that are all encrypted
- * using the same IV. So don't use these functions unless you
- * are sure you know what you do (in which case you might
- * not want to use them anyway).
- *
- * - This code cannot handle non-blocking sockets.
- */
-
-int DES_enc_write(int fd, const void *_buf, int len,
- DES_key_schedule *sched, DES_cblock *iv)
- {
-#if defined(OPENSSL_NO_POSIX_IO)
- return (-1);
-#else
-#ifdef _LIBC
- extern unsigned long time();
- extern int write();
-#endif
- const unsigned char *buf=_buf;
- long rnum;
- int i,j,k,outnum;
- static unsigned char *outbuf=NULL;
- unsigned char shortbuf[8];
- unsigned char *p;
- const unsigned char *cp;
- static int start=1;
-
- if (outbuf == NULL)
- {
- outbuf=OPENSSL_malloc(BSIZE+HDRSIZE);
- if (outbuf == NULL) return(-1);
- }
- /* If we are sending less than 8 bytes, the same char will look
- * the same if we don't pad it out with random bytes */
- if (start)
- {
- start=0;
- }
-
- /* lets recurse if we want to send the data in small chunks */
- if (len > MAXWRITE)
- {
- j=0;
- for (i=0; i<len; i+=k)
- {
- k=DES_enc_write(fd,&(buf[i]),
- ((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv);
- if (k < 0)
- return(k);
- else
- j+=k;
- }
- return(j);
- }
-
- /* write length first */
- p=outbuf;
- l2n(len,p);
-
- /* pad short strings */
- if (len < 8)
- {
- cp=shortbuf;
- memcpy(shortbuf,buf,len);
- RAND_pseudo_bytes(shortbuf+len, 8-len);
- rnum=8;
- }
- else
- {
- cp=buf;
- rnum=((len+7)/8*8); /* round up to nearest eight */
- }
-
- if (DES_rw_mode & DES_PCBC_MODE)
- DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
- DES_ENCRYPT);
- else
- DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
- DES_ENCRYPT);
-
- /* output */
- outnum=rnum+HDRSIZE;
-
- for (j=0; j<outnum; j+=i)
- {
- /* eay 26/08/92 I was not doing writing from where we
- * got up to. */
-#ifndef _WIN32
- i=write(fd,(void *)&(outbuf[j]),outnum-j);
-#else
- i=_write(fd,(void *)&(outbuf[j]),outnum-j);
-#endif
- if (i == -1)
- {
-#ifdef EINTR
- if (errno == EINTR)
- i=0;
- else
-#endif
- /* This is really a bad error - very bad
- * It will stuff-up both ends. */
- return(-1);
- }
- }
-
- return(len);
-#endif /* OPENSSL_NO_POSIX_IO */
- }
projects / cassiopeia.git / blobdiff