1 |
|
|
/* $OpenBSD: rc2_skey.c,v 1.12 2014/06/12 15:49:30 deraadt Exp $ */ |
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/crypto.h> |
60 |
|
|
#include <openssl/rc2.h> |
61 |
|
|
#include "rc2_locl.h" |
62 |
|
|
|
63 |
|
|
static const unsigned char key_table[256]={ |
64 |
|
|
0xd9,0x78,0xf9,0xc4,0x19,0xdd,0xb5,0xed,0x28,0xe9,0xfd,0x79, |
65 |
|
|
0x4a,0xa0,0xd8,0x9d,0xc6,0x7e,0x37,0x83,0x2b,0x76,0x53,0x8e, |
66 |
|
|
0x62,0x4c,0x64,0x88,0x44,0x8b,0xfb,0xa2,0x17,0x9a,0x59,0xf5, |
67 |
|
|
0x87,0xb3,0x4f,0x13,0x61,0x45,0x6d,0x8d,0x09,0x81,0x7d,0x32, |
68 |
|
|
0xbd,0x8f,0x40,0xeb,0x86,0xb7,0x7b,0x0b,0xf0,0x95,0x21,0x22, |
69 |
|
|
0x5c,0x6b,0x4e,0x82,0x54,0xd6,0x65,0x93,0xce,0x60,0xb2,0x1c, |
70 |
|
|
0x73,0x56,0xc0,0x14,0xa7,0x8c,0xf1,0xdc,0x12,0x75,0xca,0x1f, |
71 |
|
|
0x3b,0xbe,0xe4,0xd1,0x42,0x3d,0xd4,0x30,0xa3,0x3c,0xb6,0x26, |
72 |
|
|
0x6f,0xbf,0x0e,0xda,0x46,0x69,0x07,0x57,0x27,0xf2,0x1d,0x9b, |
73 |
|
|
0xbc,0x94,0x43,0x03,0xf8,0x11,0xc7,0xf6,0x90,0xef,0x3e,0xe7, |
74 |
|
|
0x06,0xc3,0xd5,0x2f,0xc8,0x66,0x1e,0xd7,0x08,0xe8,0xea,0xde, |
75 |
|
|
0x80,0x52,0xee,0xf7,0x84,0xaa,0x72,0xac,0x35,0x4d,0x6a,0x2a, |
76 |
|
|
0x96,0x1a,0xd2,0x71,0x5a,0x15,0x49,0x74,0x4b,0x9f,0xd0,0x5e, |
77 |
|
|
0x04,0x18,0xa4,0xec,0xc2,0xe0,0x41,0x6e,0x0f,0x51,0xcb,0xcc, |
78 |
|
|
0x24,0x91,0xaf,0x50,0xa1,0xf4,0x70,0x39,0x99,0x7c,0x3a,0x85, |
79 |
|
|
0x23,0xb8,0xb4,0x7a,0xfc,0x02,0x36,0x5b,0x25,0x55,0x97,0x31, |
80 |
|
|
0x2d,0x5d,0xfa,0x98,0xe3,0x8a,0x92,0xae,0x05,0xdf,0x29,0x10, |
81 |
|
|
0x67,0x6c,0xba,0xc9,0xd3,0x00,0xe6,0xcf,0xe1,0x9e,0xa8,0x2c, |
82 |
|
|
0x63,0x16,0x01,0x3f,0x58,0xe2,0x89,0xa9,0x0d,0x38,0x34,0x1b, |
83 |
|
|
0xab,0x33,0xff,0xb0,0xbb,0x48,0x0c,0x5f,0xb9,0xb1,0xcd,0x2e, |
84 |
|
|
0xc5,0xf3,0xdb,0x47,0xe5,0xa5,0x9c,0x77,0x0a,0xa6,0x20,0x68, |
85 |
|
|
0xfe,0x7f,0xc1,0xad, |
86 |
|
|
}; |
87 |
|
|
|
88 |
|
|
/* It has come to my attention that there are 2 versions of the RC2 |
89 |
|
|
* key schedule. One which is normal, and anther which has a hook to |
90 |
|
|
* use a reduced key length. |
91 |
|
|
* BSAFE uses the 'retarded' version. What I previously shipped is |
92 |
|
|
* the same as specifying 1024 for the 'bits' parameter. Bsafe uses |
93 |
|
|
* a version where the bits parameter is the same as len*8 */ |
94 |
|
|
void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) |
95 |
|
|
{ |
96 |
|
|
int i,j; |
97 |
|
|
unsigned char *k; |
98 |
|
|
RC2_INT *ki; |
99 |
|
|
unsigned int c,d; |
100 |
|
|
|
101 |
|
184 |
k= (unsigned char *)&(key->data[0]); |
102 |
|
92 |
*k=0; /* for if there is a zero length key */ |
103 |
|
|
|
104 |
✗✓ |
92 |
if (len > 128) len=128; |
105 |
✓✓ |
104 |
if (bits <= 0) bits=1024; |
106 |
✗✓ |
92 |
if (bits > 1024) bits=1024; |
107 |
|
|
|
108 |
✓✓ |
2672 |
for (i=0; i<len; i++) |
109 |
|
1244 |
k[i]=data[i]; |
110 |
|
|
|
111 |
|
|
/* expand table */ |
112 |
|
92 |
d=k[len-1]; |
113 |
|
|
j=0; |
114 |
✓✓ |
21248 |
for (i=len; i < 128; i++,j++) |
115 |
|
|
{ |
116 |
|
10532 |
d=key_table[(k[j]+d)&0xff]; |
117 |
|
10532 |
k[i]=d; |
118 |
|
|
} |
119 |
|
|
|
120 |
|
|
/* hmm.... key reduction to 'bits' bits */ |
121 |
|
|
|
122 |
|
92 |
j=(bits+7)>>3; |
123 |
|
92 |
i=128-j; |
124 |
|
92 |
c= (0xff>>(-bits & 0x07)); |
125 |
|
|
|
126 |
|
92 |
d=key_table[k[i]&c]; |
127 |
|
|
k[i]=d; |
128 |
✓✓ |
18560 |
while (i--) |
129 |
|
|
{ |
130 |
|
9188 |
d=key_table[k[i+j]^d]; |
131 |
|
|
k[i]=d; |
132 |
|
|
} |
133 |
|
|
|
134 |
|
|
/* copy from bytes into RC2_INT's */ |
135 |
|
92 |
ki= &(key->data[63]); |
136 |
✓✓ |
11960 |
for (i=127; i>=0; i-=2) |
137 |
|
5888 |
*(ki--)=((k[i]<<8)|k[i-1])&0xffff; |
138 |
|
92 |
} |