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Diffstat (limited to 'crypto/des/enc_read.c')
| -rw-r--r-- | crypto/des/enc_read.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/crypto/des/enc_read.c b/crypto/des/enc_read.c deleted file mode 100644 index fcb66541bdd1..000000000000 --- a/crypto/des/enc_read.c +++ /dev/null @@ -1,235 +0,0 @@ -/* crypto/des/enc_read.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 <stdio.h> -#include <errno.h> -#include "cryptlib.h" -#include "des_locl.h" - -/* This has some uglies in it but it works - even over sockets. */ -/* - * extern int errno; - */ -OPENSSL_IMPLEMENT_GLOBAL(int, DES_rw_mode, DES_PCBC_MODE) - -/*- - * 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. - * - * - This function uses an internal state and thus cannot be - * used on multiple files. - */ -int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched, - DES_cblock *iv) -{ -#if defined(OPENSSL_NO_POSIX_IO) - return (0); -#else - /* data to be unencrypted */ - int net_num = 0; - static unsigned char *net = NULL; - /* - * extra unencrypted data for when a block of 100 comes in but is - * des_read one byte at a time. - */ - static unsigned char *unnet = NULL; - static int unnet_start = 0; - static int unnet_left = 0; - static unsigned char *tmpbuf = NULL; - int i; - long num = 0, rnum; - unsigned char *p; - - if (tmpbuf == NULL) { - tmpbuf = OPENSSL_malloc(BSIZE); - if (tmpbuf == NULL) - return (-1); - } - if (net == NULL) { - net = OPENSSL_malloc(BSIZE); - if (net == NULL) - return (-1); - } - if (unnet == NULL) { - unnet = OPENSSL_malloc(BSIZE); - if (unnet == NULL) - return (-1); - } - /* left over data from last decrypt */ - if (unnet_left != 0) { - if (unnet_left < len) { - /* - * we still still need more data but will return with the number - * of bytes we have - should always check the return value - */ - memcpy(buf, &(unnet[unnet_start]), unnet_left); - /* - * eay 26/08/92 I had the next 2 lines reversed :-( - */ - i = unnet_left; - unnet_start = unnet_left = 0; - } else { - memcpy(buf, &(unnet[unnet_start]), len); - unnet_start += len; - unnet_left -= len; - i = len; - } - return (i); - } - - /* We need to get more data. */ - if (len > MAXWRITE) - len = MAXWRITE; - - /* first - get the length */ - while (net_num < HDRSIZE) { -# ifndef OPENSSL_SYS_WIN32 - i = read(fd, (void *)&(net[net_num]), HDRSIZE - net_num); -# else - i = _read(fd, (void *)&(net[net_num]), HDRSIZE - net_num); -# endif -# ifdef EINTR - if ((i == -1) && (errno == EINTR)) - continue; -# endif - if (i <= 0) - return (0); - net_num += i; - } - - /* we now have at net_num bytes in net */ - p = net; - /* num=0; */ - n2l(p, num); - /* - * num should be rounded up to the next group of eight we make sure that - * we have read a multiple of 8 bytes from the net. - */ - if ((num > MAXWRITE) || (num < 0)) /* error */ - return (-1); - rnum = (num < 8) ? 8 : ((num + 7) / 8 * 8); - - net_num = 0; - while (net_num < rnum) { -# ifndef OPENSSL_SYS_WIN32 - i = read(fd, (void *)&(net[net_num]), rnum - net_num); -# else - i = _read(fd, (void *)&(net[net_num]), rnum - net_num); -# endif -# ifdef EINTR - if ((i == -1) && (errno == EINTR)) - continue; -# endif - if (i <= 0) - return (0); - net_num += i; - } - - /* Check if there will be data left over. */ - if (len < num) { - if (DES_rw_mode & DES_PCBC_MODE) - DES_pcbc_encrypt(net, unnet, num, sched, iv, DES_DECRYPT); - else - DES_cbc_encrypt(net, unnet, num, sched, iv, DES_DECRYPT); - memcpy(buf, unnet, len); - unnet_start = len; - unnet_left = num - len; - - /* - * The following line is done because we return num as the number of - * bytes read. - */ - num = len; - } else { - /*- - * >output is a multiple of 8 byes, if len < rnum - * >we must be careful. The user must be aware that this - * >routine will write more bytes than he asked for. - * >The length of the buffer must be correct. - * FIXED - Should be ok now 18-9-90 - eay */ - if (len < rnum) { - - if (DES_rw_mode & DES_PCBC_MODE) - DES_pcbc_encrypt(net, tmpbuf, num, sched, iv, DES_DECRYPT); - else - DES_cbc_encrypt(net, tmpbuf, num, sched, iv, DES_DECRYPT); - - /* - * eay 26/08/92 fix a bug that returned more bytes than you asked - * for (returned len bytes :-( - */ - memcpy(buf, tmpbuf, num); - } else { - if (DES_rw_mode & DES_PCBC_MODE) - DES_pcbc_encrypt(net, buf, num, sched, iv, DES_DECRYPT); - else - DES_cbc_encrypt(net, buf, num, sched, iv, DES_DECRYPT); - } - } - return num; -#endif /* OPENSSL_NO_POSIX_IO */ -} |