1*0Sstevel@tonic-gate /* crypto/des/ncbc_enc.c */
2*0Sstevel@tonic-gate /*
3*0Sstevel@tonic-gate * #included by:
4*0Sstevel@tonic-gate * cbc_enc.c (DES_cbc_encrypt)
5*0Sstevel@tonic-gate * des_enc.c (DES_ncbc_encrypt)
6*0Sstevel@tonic-gate */
7*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
8*0Sstevel@tonic-gate * All rights reserved.
9*0Sstevel@tonic-gate *
10*0Sstevel@tonic-gate * This package is an SSL implementation written
11*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
12*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
15*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
16*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
17*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
18*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
19*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
20*0Sstevel@tonic-gate *
21*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
22*0Sstevel@tonic-gate * the code are not to be removed.
23*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
24*0Sstevel@tonic-gate * as the author of the parts of the library used.
25*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
26*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
27*0Sstevel@tonic-gate *
28*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
29*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
30*0Sstevel@tonic-gate * are met:
31*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
32*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
33*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
34*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
35*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
36*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
37*0Sstevel@tonic-gate * must display the following acknowledgement:
38*0Sstevel@tonic-gate * "This product includes cryptographic software written by
39*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
40*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
41*0Sstevel@tonic-gate * being used are not cryptographic related :-).
42*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
43*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
44*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
45*0Sstevel@tonic-gate *
46*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
47*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
50*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56*0Sstevel@tonic-gate * SUCH DAMAGE.
57*0Sstevel@tonic-gate *
58*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
59*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
60*0Sstevel@tonic-gate * copied and put under another distribution licence
61*0Sstevel@tonic-gate * [including the GNU Public Licence.]
62*0Sstevel@tonic-gate */
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate #include "des_locl.h"
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate #ifdef CBC_ENC_C__DONT_UPDATE_IV
DES_cbc_encrypt(const unsigned char * in,unsigned char * out,long length,DES_key_schedule * _schedule,DES_cblock * ivec,int enc)67*0Sstevel@tonic-gate void DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
68*0Sstevel@tonic-gate DES_key_schedule *_schedule, DES_cblock *ivec, int enc)
69*0Sstevel@tonic-gate #else
70*0Sstevel@tonic-gate void DES_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length,
71*0Sstevel@tonic-gate DES_key_schedule *_schedule, DES_cblock *ivec, int enc)
72*0Sstevel@tonic-gate #endif
73*0Sstevel@tonic-gate {
74*0Sstevel@tonic-gate register DES_LONG tin0,tin1;
75*0Sstevel@tonic-gate register DES_LONG tout0,tout1,xor0,xor1;
76*0Sstevel@tonic-gate register long l=length;
77*0Sstevel@tonic-gate DES_LONG tin[2];
78*0Sstevel@tonic-gate unsigned char *iv;
79*0Sstevel@tonic-gate
80*0Sstevel@tonic-gate iv = &(*ivec)[0];
81*0Sstevel@tonic-gate
82*0Sstevel@tonic-gate if (enc)
83*0Sstevel@tonic-gate {
84*0Sstevel@tonic-gate c2l(iv,tout0);
85*0Sstevel@tonic-gate c2l(iv,tout1);
86*0Sstevel@tonic-gate for (l-=8; l>=0; l-=8)
87*0Sstevel@tonic-gate {
88*0Sstevel@tonic-gate c2l(in,tin0);
89*0Sstevel@tonic-gate c2l(in,tin1);
90*0Sstevel@tonic-gate tin0^=tout0; tin[0]=tin0;
91*0Sstevel@tonic-gate tin1^=tout1; tin[1]=tin1;
92*0Sstevel@tonic-gate DES_encrypt1((DES_LONG *)tin,_schedule,DES_ENCRYPT);
93*0Sstevel@tonic-gate tout0=tin[0]; l2c(tout0,out);
94*0Sstevel@tonic-gate tout1=tin[1]; l2c(tout1,out);
95*0Sstevel@tonic-gate }
96*0Sstevel@tonic-gate if (l != -8)
97*0Sstevel@tonic-gate {
98*0Sstevel@tonic-gate c2ln(in,tin0,tin1,l+8);
99*0Sstevel@tonic-gate tin0^=tout0; tin[0]=tin0;
100*0Sstevel@tonic-gate tin1^=tout1; tin[1]=tin1;
101*0Sstevel@tonic-gate DES_encrypt1((DES_LONG *)tin,_schedule,DES_ENCRYPT);
102*0Sstevel@tonic-gate tout0=tin[0]; l2c(tout0,out);
103*0Sstevel@tonic-gate tout1=tin[1]; l2c(tout1,out);
104*0Sstevel@tonic-gate }
105*0Sstevel@tonic-gate #ifndef CBC_ENC_C__DONT_UPDATE_IV
106*0Sstevel@tonic-gate iv = &(*ivec)[0];
107*0Sstevel@tonic-gate l2c(tout0,iv);
108*0Sstevel@tonic-gate l2c(tout1,iv);
109*0Sstevel@tonic-gate #endif
110*0Sstevel@tonic-gate }
111*0Sstevel@tonic-gate else
112*0Sstevel@tonic-gate {
113*0Sstevel@tonic-gate c2l(iv,xor0);
114*0Sstevel@tonic-gate c2l(iv,xor1);
115*0Sstevel@tonic-gate for (l-=8; l>=0; l-=8)
116*0Sstevel@tonic-gate {
117*0Sstevel@tonic-gate c2l(in,tin0); tin[0]=tin0;
118*0Sstevel@tonic-gate c2l(in,tin1); tin[1]=tin1;
119*0Sstevel@tonic-gate DES_encrypt1((DES_LONG *)tin,_schedule,DES_DECRYPT);
120*0Sstevel@tonic-gate tout0=tin[0]^xor0;
121*0Sstevel@tonic-gate tout1=tin[1]^xor1;
122*0Sstevel@tonic-gate l2c(tout0,out);
123*0Sstevel@tonic-gate l2c(tout1,out);
124*0Sstevel@tonic-gate xor0=tin0;
125*0Sstevel@tonic-gate xor1=tin1;
126*0Sstevel@tonic-gate }
127*0Sstevel@tonic-gate if (l != -8)
128*0Sstevel@tonic-gate {
129*0Sstevel@tonic-gate c2l(in,tin0); tin[0]=tin0;
130*0Sstevel@tonic-gate c2l(in,tin1); tin[1]=tin1;
131*0Sstevel@tonic-gate DES_encrypt1((DES_LONG *)tin,_schedule,DES_DECRYPT);
132*0Sstevel@tonic-gate tout0=tin[0]^xor0;
133*0Sstevel@tonic-gate tout1=tin[1]^xor1;
134*0Sstevel@tonic-gate l2cn(tout0,tout1,out,l+8);
135*0Sstevel@tonic-gate #ifndef CBC_ENC_C__DONT_UPDATE_IV
136*0Sstevel@tonic-gate xor0=tin0;
137*0Sstevel@tonic-gate xor1=tin1;
138*0Sstevel@tonic-gate #endif
139*0Sstevel@tonic-gate }
140*0Sstevel@tonic-gate #ifndef CBC_ENC_C__DONT_UPDATE_IV
141*0Sstevel@tonic-gate iv = &(*ivec)[0];
142*0Sstevel@tonic-gate l2c(xor0,iv);
143*0Sstevel@tonic-gate l2c(xor1,iv);
144*0Sstevel@tonic-gate #endif
145*0Sstevel@tonic-gate }
146*0Sstevel@tonic-gate tin0=tin1=tout0=tout1=xor0=xor1=0;
147*0Sstevel@tonic-gate tin[0]=tin[1]=0;
148*0Sstevel@tonic-gate }
149