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1 : : /* crypto/idea/i_cbc.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 <openssl/idea.h>
60 : : #include "idea_lcl.h"
61 : :
62 : 1553 : void idea_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
63 : : IDEA_KEY_SCHEDULE *ks, unsigned char *iv, int encrypt)
64 : : {
65 : : register unsigned long tin0,tin1;
66 : : register unsigned long tout0,tout1,xor0,xor1;
67 : 1553 : register long l=length;
68 : : unsigned long tin[2];
69 : :
70 [ + + ]: 1553 : if (encrypt)
71 : : {
72 : 795 : n2l(iv,tout0);
73 : 795 : n2l(iv,tout1);
74 : 795 : iv-=8;
75 [ + + ]: 16794 : for (l-=8; l>=0; l-=8)
76 : : {
77 : 15999 : n2l(in,tin0);
78 : 15999 : n2l(in,tin1);
79 : 15999 : tin0^=tout0;
80 : 15999 : tin1^=tout1;
81 : 15999 : tin[0]=tin0;
82 : 15999 : tin[1]=tin1;
83 : 15999 : idea_encrypt(tin,ks);
84 : 15999 : tout0=tin[0]; l2n(tout0,out);
85 : 15999 : tout1=tin[1]; l2n(tout1,out);
86 : : }
87 [ + + ]: 795 : if (l != -8)
88 : : {
89 [ - - + - : 1 : n2ln(in,tin0,tin1,l+8);
- - - -
- ]
90 : 1 : tin0^=tout0;
91 : 1 : tin1^=tout1;
92 : 1 : tin[0]=tin0;
93 : 1 : tin[1]=tin1;
94 : 1 : idea_encrypt(tin,ks);
95 : 1 : tout0=tin[0]; l2n(tout0,out);
96 : 1 : tout1=tin[1]; l2n(tout1,out);
97 : : }
98 : 795 : l2n(tout0,iv);
99 : 795 : l2n(tout1,iv);
100 : : }
101 : : else
102 : : {
103 : 758 : n2l(iv,xor0);
104 : 758 : n2l(iv,xor1);
105 : 758 : iv-=8;
106 [ + + ]: 16691 : for (l-=8; l>=0; l-=8)
107 : : {
108 : 15933 : n2l(in,tin0); tin[0]=tin0;
109 : 15933 : n2l(in,tin1); tin[1]=tin1;
110 : 15933 : idea_encrypt(tin,ks);
111 : 15933 : tout0=tin[0]^xor0;
112 : 15933 : tout1=tin[1]^xor1;
113 : 15933 : l2n(tout0,out);
114 : 15933 : l2n(tout1,out);
115 : 15933 : xor0=tin0;
116 : 15933 : xor1=tin1;
117 : : }
118 [ + + ]: 758 : if (l != -8)
119 : : {
120 : 1 : n2l(in,tin0); tin[0]=tin0;
121 : 1 : n2l(in,tin1); tin[1]=tin1;
122 : 1 : idea_encrypt(tin,ks);
123 : 1 : tout0=tin[0]^xor0;
124 : 1 : tout1=tin[1]^xor1;
125 [ - - + - : 1 : l2nn(tout0,tout1,out,l+8);
- - - -
- ]
126 : 1 : xor0=tin0;
127 : 1 : xor1=tin1;
128 : : }
129 : 758 : l2n(xor0,iv);
130 : 758 : l2n(xor1,iv);
131 : : }
132 : 1553 : tin0=tin1=tout0=tout1=xor0=xor1=0;
133 : : tin[0]=tin[1]=0;
134 : 1553 : }
135 : :
136 : 33470 : void idea_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key)
137 : : {
138 : : register IDEA_INT *p;
139 : : register unsigned long x1,x2,x3,x4,t0,t1,ul;
140 : :
141 : 33470 : x2=d[0];
142 : 33470 : x1=(x2>>16);
143 : 33470 : x4=d[1];
144 : 33470 : x3=(x4>>16);
145 : :
146 : 33470 : p= &(key->data[0][0]);
147 : :
148 [ + + ][ + + ]: 33470 : E_IDEA(0);
[ + - ][ + - ]
149 [ + - ][ + - ]: 33470 : E_IDEA(1);
[ + + ][ + - ]
150 [ + - ][ + - ]: 33470 : E_IDEA(2);
[ + - ][ + + ]
151 [ + - ][ + + ]: 33470 : E_IDEA(3);
[ + - ][ + - ]
152 [ + + ][ + - ]: 33470 : E_IDEA(4);
[ + - ][ + - ]
153 [ + - ][ + - ]: 33470 : E_IDEA(5);
[ + - ][ + + ]
154 [ + - ][ + - ]: 33470 : E_IDEA(6);
[ + + ][ + - ]
155 [ + - ][ + + ]: 33470 : E_IDEA(7);
[ + - ][ + - ]
156 : :
157 : 33470 : x1&=0xffff;
158 [ + + ]: 33470 : idea_mul(x1,x1,*p,ul); p++;
159 : :
160 : 33470 : t0= x3+ *(p++);
161 : 33470 : t1= x2+ *(p++);
162 : :
163 : 33470 : x4&=0xffff;
164 [ + - ]: 33470 : idea_mul(x4,x4,*p,ul);
165 : :
166 : 33470 : d[0]=(t0&0xffff)|((x1&0xffff)<<16);
167 : 33470 : d[1]=(x4&0xffff)|((t1&0xffff)<<16);
168 : 33470 : }
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