]>
Commit | Line | Data |
---|---|---|
58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
58 | #include <errno.h> | |
59 | #include <time.h> | |
199d59e5 | 60 | #include <stdio.h> |
b39fc560 | 61 | #include "internal/cryptlib.h" |
d02b48c6 | 62 | #include "des_locl.h" |
cfa3747b | 63 | #include <openssl/rand.h> |
d02b48c6 | 64 | |
1d97c843 | 65 | /*- |
7c0f3d09 BM |
66 | * WARNINGS: |
67 | * | |
c2e4f17c | 68 | * - The data format used by DES_enc_write() and DES_enc_read() |
7c0f3d09 | 69 | * has a cryptographic weakness: When asked to write more |
c2e4f17c | 70 | * than MAXWRITE bytes, DES_enc_write will split the data |
7c0f3d09 BM |
71 | * into several chunks that are all encrypted |
72 | * using the same IV. So don't use these functions unless you | |
73 | * are sure you know what you do (in which case you might | |
74 | * not want to use them anyway). | |
75 | * | |
76 | * - This code cannot handle non-blocking sockets. | |
77 | */ | |
78 | ||
c2e4f17c | 79 | int DES_enc_write(int fd, const void *_buf, int len, |
0f113f3e MC |
80 | DES_key_schedule *sched, DES_cblock *iv) |
81 | { | |
1715e488 | 82 | #if defined(OPENSSL_NO_POSIX_IO) |
0f113f3e | 83 | return (-1); |
1715e488 | 84 | #else |
0f113f3e MC |
85 | # ifdef _LIBC |
86 | extern unsigned long time(); | |
87 | extern int write(); | |
88 | # endif | |
89 | const unsigned char *buf = _buf; | |
90 | long rnum; | |
91 | int i, j, k, outnum; | |
92 | static unsigned char *outbuf = NULL; | |
93 | unsigned char shortbuf[8]; | |
94 | unsigned char *p; | |
95 | const unsigned char *cp; | |
96 | static int start = 1; | |
d02b48c6 | 97 | |
873fb39f MC |
98 | if (len < 0) |
99 | return -1; | |
100 | ||
0f113f3e MC |
101 | if (outbuf == NULL) { |
102 | outbuf = OPENSSL_malloc(BSIZE + HDRSIZE); | |
103 | if (outbuf == NULL) | |
104 | return (-1); | |
105 | } | |
106 | /* | |
107 | * If we are sending less than 8 bytes, the same char will look the same | |
108 | * if we don't pad it out with random bytes | |
109 | */ | |
110 | if (start) { | |
111 | start = 0; | |
112 | } | |
d02b48c6 | 113 | |
0f113f3e MC |
114 | /* lets recurse if we want to send the data in small chunks */ |
115 | if (len > MAXWRITE) { | |
116 | j = 0; | |
117 | for (i = 0; i < len; i += k) { | |
118 | k = DES_enc_write(fd, &(buf[i]), | |
119 | ((len - i) > MAXWRITE) ? MAXWRITE : (len - i), | |
120 | sched, iv); | |
121 | if (k < 0) | |
122 | return (k); | |
123 | else | |
124 | j += k; | |
125 | } | |
126 | return (j); | |
127 | } | |
d02b48c6 | 128 | |
0f113f3e MC |
129 | /* write length first */ |
130 | p = outbuf; | |
131 | l2n(len, p); | |
d02b48c6 | 132 | |
0f113f3e MC |
133 | /* pad short strings */ |
134 | if (len < 8) { | |
135 | cp = shortbuf; | |
136 | memcpy(shortbuf, buf, len); | |
266483d2 MC |
137 | if (RAND_bytes(shortbuf + len, 8 - len) <= 0) |
138 | return -1; | |
0f113f3e MC |
139 | rnum = 8; |
140 | } else { | |
141 | cp = buf; | |
142 | rnum = ((len + 7) / 8 * 8); /* round up to nearest eight */ | |
143 | } | |
d02b48c6 | 144 | |
0f113f3e MC |
145 | if (DES_rw_mode & DES_PCBC_MODE) |
146 | DES_pcbc_encrypt(cp, &(outbuf[HDRSIZE]), (len < 8) ? 8 : len, sched, | |
147 | iv, DES_ENCRYPT); | |
148 | else | |
149 | DES_cbc_encrypt(cp, &(outbuf[HDRSIZE]), (len < 8) ? 8 : len, sched, | |
150 | iv, DES_ENCRYPT); | |
d02b48c6 | 151 | |
0f113f3e MC |
152 | /* output */ |
153 | outnum = rnum + HDRSIZE; | |
d02b48c6 | 154 | |
0f113f3e MC |
155 | for (j = 0; j < outnum; j += i) { |
156 | /* | |
157 | * eay 26/08/92 I was not doing writing from where we got up to. | |
158 | */ | |
159 | # ifndef _WIN32 | |
160 | i = write(fd, (void *)&(outbuf[j]), outnum - j); | |
161 | # else | |
162 | i = _write(fd, (void *)&(outbuf[j]), outnum - j); | |
163 | # endif | |
164 | if (i == -1) { | |
165 | # ifdef EINTR | |
166 | if (errno == EINTR) | |
167 | i = 0; | |
168 | else | |
169 | # endif | |
170 | /* | |
171 | * This is really a bad error - very bad It will stuff-up | |
172 | * both ends. | |
173 | */ | |
174 | return (-1); | |
175 | } | |
176 | } | |
d02b48c6 | 177 | |
0f113f3e MC |
178 | return (len); |
179 | #endif /* OPENSSL_NO_POSIX_IO */ | |
180 | } |