summaryrefslogtreecommitdiff
path: root/src/lib/libcrypto/des/ofb_enc.c
diff options
context:
space:
mode:
authorryker <>1998-10-05 20:13:14 +0000
committerryker <>1998-10-05 20:13:14 +0000
commitaeeae06a79815dc190061534d47236cec09f9e32 (patch)
tree851692b9c2f9c04f077666855641900f19fdb217 /src/lib/libcrypto/des/ofb_enc.c
parenta4f79641824cbf9f60ca9d1168d1fcc46717a82a (diff)
downloadopenbsd-aeeae06a79815dc190061534d47236cec09f9e32.tar.gz
openbsd-aeeae06a79815dc190061534d47236cec09f9e32.tar.bz2
openbsd-aeeae06a79815dc190061534d47236cec09f9e32.zip
Import of SSLeay-0.9.0b with RSA and IDEA stubbed + OpenBSD build
functionality for shared libs. Note that routines such as sslv2_init and friends that use RSA will not work due to lack of RSA in this library. Needs documentation and help from ports for easy upgrade to full functionality where legally possible.
Diffstat (limited to 'src/lib/libcrypto/des/ofb_enc.c')
-rw-r--r--src/lib/libcrypto/des/ofb_enc.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/src/lib/libcrypto/des/ofb_enc.c b/src/lib/libcrypto/des/ofb_enc.c
new file mode 100644
index 0000000000..4db0cdbd60
--- /dev/null
+++ b/src/lib/libcrypto/des/ofb_enc.c
@@ -0,0 +1,139 @@
1/* crypto/des/ofb_enc.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include "des_locl.h"
60
61/* The input and output are loaded in multiples of 8 bits.
62 * What this means is that if you hame numbits=12 and length=2
63 * the first 12 bits will be retrieved from the first byte and half
64 * the second. The second 12 bits will come from the 3rd and half the 4th
65 * byte.
66 */
67void des_ofb_encrypt(in, out, numbits, length, schedule, ivec)
68unsigned char *in;
69unsigned char *out;
70int numbits;
71long length;
72des_key_schedule schedule;
73des_cblock (*ivec);
74 {
75 register DES_LONG d0,d1,vv0,vv1,v0,v1,n=(numbits+7)/8;
76 register DES_LONG mask0,mask1;
77 register long l=length;
78 register int num=numbits;
79 DES_LONG ti[2];
80 unsigned char *iv;
81
82 if (num > 64) return;
83 if (num > 32)
84 {
85 mask0=0xffffffffL;
86 if (num >= 64)
87 mask1=mask0;
88 else
89 mask1=(1L<<(num-32))-1;
90 }
91 else
92 {
93 if (num == 32)
94 mask0=0xffffffffL;
95 else
96 mask0=(1L<<num)-1;
97 mask1=0x00000000L;
98 }
99
100 iv=(unsigned char *)ivec;
101 c2l(iv,v0);
102 c2l(iv,v1);
103 ti[0]=v0;
104 ti[1]=v1;
105 while (l-- > 0)
106 {
107 ti[0]=v0;
108 ti[1]=v1;
109 des_encrypt((DES_LONG *)ti,schedule,DES_ENCRYPT);
110 vv0=ti[0];
111 vv1=ti[1];
112 c2ln(in,d0,d1,n);
113 in+=n;
114 d0=(d0^vv0)&mask0;
115 d1=(d1^vv1)&mask1;
116 l2cn(d0,d1,out,n);
117 out+=n;
118
119 if (num == 32)
120 { v0=v1; v1=vv0; }
121 else if (num == 64)
122 { v0=vv0; v1=vv1; }
123 else if (num > 32) /* && num != 64 */
124 {
125 v0=((v1>>(num-32))|(vv0<<(64-num)))&0xffffffffL;
126 v1=((vv0>>(num-32))|(vv1<<(64-num)))&0xffffffffL;
127 }
128 else /* num < 32 */
129 {
130 v0=((v0>>num)|(v1<<(32-num)))&0xffffffffL;
131 v1=((v1>>num)|(vv0<<(32-num)))&0xffffffffL;
132 }
133 }
134 iv=(unsigned char *)ivec;
135 l2c(v0,iv);
136 l2c(v1,iv);
137 v0=v1=d0=d1=ti[0]=ti[1]=vv0=vv1=0;
138 }
139