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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 | ||
ec577822 | 58 | #include <openssl/rc2.h> |
d02b48c6 RE |
59 | #include "rc2_locl.h" |
60 | ||
0f113f3e MC |
61 | static const unsigned char key_table[256] = { |
62 | 0xd9, 0x78, 0xf9, 0xc4, 0x19, 0xdd, 0xb5, 0xed, 0x28, 0xe9, 0xfd, 0x79, | |
63 | 0x4a, 0xa0, 0xd8, 0x9d, 0xc6, 0x7e, 0x37, 0x83, 0x2b, 0x76, 0x53, 0x8e, | |
64 | 0x62, 0x4c, 0x64, 0x88, 0x44, 0x8b, 0xfb, 0xa2, 0x17, 0x9a, 0x59, 0xf5, | |
65 | 0x87, 0xb3, 0x4f, 0x13, 0x61, 0x45, 0x6d, 0x8d, 0x09, 0x81, 0x7d, 0x32, | |
66 | 0xbd, 0x8f, 0x40, 0xeb, 0x86, 0xb7, 0x7b, 0x0b, 0xf0, 0x95, 0x21, 0x22, | |
67 | 0x5c, 0x6b, 0x4e, 0x82, 0x54, 0xd6, 0x65, 0x93, 0xce, 0x60, 0xb2, 0x1c, | |
68 | 0x73, 0x56, 0xc0, 0x14, 0xa7, 0x8c, 0xf1, 0xdc, 0x12, 0x75, 0xca, 0x1f, | |
69 | 0x3b, 0xbe, 0xe4, 0xd1, 0x42, 0x3d, 0xd4, 0x30, 0xa3, 0x3c, 0xb6, 0x26, | |
70 | 0x6f, 0xbf, 0x0e, 0xda, 0x46, 0x69, 0x07, 0x57, 0x27, 0xf2, 0x1d, 0x9b, | |
71 | 0xbc, 0x94, 0x43, 0x03, 0xf8, 0x11, 0xc7, 0xf6, 0x90, 0xef, 0x3e, 0xe7, | |
72 | 0x06, 0xc3, 0xd5, 0x2f, 0xc8, 0x66, 0x1e, 0xd7, 0x08, 0xe8, 0xea, 0xde, | |
73 | 0x80, 0x52, 0xee, 0xf7, 0x84, 0xaa, 0x72, 0xac, 0x35, 0x4d, 0x6a, 0x2a, | |
74 | 0x96, 0x1a, 0xd2, 0x71, 0x5a, 0x15, 0x49, 0x74, 0x4b, 0x9f, 0xd0, 0x5e, | |
75 | 0x04, 0x18, 0xa4, 0xec, 0xc2, 0xe0, 0x41, 0x6e, 0x0f, 0x51, 0xcb, 0xcc, | |
76 | 0x24, 0x91, 0xaf, 0x50, 0xa1, 0xf4, 0x70, 0x39, 0x99, 0x7c, 0x3a, 0x85, | |
77 | 0x23, 0xb8, 0xb4, 0x7a, 0xfc, 0x02, 0x36, 0x5b, 0x25, 0x55, 0x97, 0x31, | |
78 | 0x2d, 0x5d, 0xfa, 0x98, 0xe3, 0x8a, 0x92, 0xae, 0x05, 0xdf, 0x29, 0x10, | |
79 | 0x67, 0x6c, 0xba, 0xc9, 0xd3, 0x00, 0xe6, 0xcf, 0xe1, 0x9e, 0xa8, 0x2c, | |
80 | 0x63, 0x16, 0x01, 0x3f, 0x58, 0xe2, 0x89, 0xa9, 0x0d, 0x38, 0x34, 0x1b, | |
81 | 0xab, 0x33, 0xff, 0xb0, 0xbb, 0x48, 0x0c, 0x5f, 0xb9, 0xb1, 0xcd, 0x2e, | |
82 | 0xc5, 0xf3, 0xdb, 0x47, 0xe5, 0xa5, 0x9c, 0x77, 0x0a, 0xa6, 0x20, 0x68, | |
83 | 0xfe, 0x7f, 0xc1, 0xad, | |
84 | }; | |
d02b48c6 | 85 | |
0491e058 | 86 | #if defined(_MSC_VER) && defined(_ARM_) |
0f113f3e | 87 | # pragma optimize("g",off) |
0491e058 AP |
88 | #endif |
89 | ||
0f113f3e MC |
90 | /* |
91 | * It has come to my attention that there are 2 versions of the RC2 key | |
92 | * schedule. One which is normal, and anther which has a hook to use a | |
93 | * reduced key length. BSAFE uses the 'retarded' version. What I previously | |
94 | * shipped is the same as specifying 1024 for the 'bits' parameter. Bsafe | |
95 | * uses a version where the bits parameter is the same as len*8 | |
96 | */ | |
1921eaad | 97 | void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) |
0f113f3e MC |
98 | { |
99 | int i, j; | |
100 | unsigned char *k; | |
101 | RC2_INT *ki; | |
102 | unsigned int c, d; | |
d02b48c6 | 103 | |
0f113f3e MC |
104 | k = (unsigned char *)&(key->data[0]); |
105 | *k = 0; /* for if there is a zero length key */ | |
d02b48c6 | 106 | |
0f113f3e MC |
107 | if (len > 128) |
108 | len = 128; | |
109 | if (bits <= 0) | |
110 | bits = 1024; | |
111 | if (bits > 1024) | |
112 | bits = 1024; | |
d02b48c6 | 113 | |
0f113f3e MC |
114 | for (i = 0; i < len; i++) |
115 | k[i] = data[i]; | |
d02b48c6 | 116 | |
0f113f3e MC |
117 | /* expand table */ |
118 | d = k[len - 1]; | |
119 | j = 0; | |
120 | for (i = len; i < 128; i++, j++) { | |
121 | d = key_table[(k[j] + d) & 0xff]; | |
122 | k[i] = d; | |
123 | } | |
d02b48c6 | 124 | |
0f113f3e | 125 | /* hmm.... key reduction to 'bits' bits */ |
d02b48c6 | 126 | |
0f113f3e MC |
127 | j = (bits + 7) >> 3; |
128 | i = 128 - j; | |
129 | c = (0xff >> (-bits & 0x07)); | |
d02b48c6 | 130 | |
0f113f3e MC |
131 | d = key_table[k[i] & c]; |
132 | k[i] = d; | |
133 | while (i--) { | |
134 | d = key_table[k[i + j] ^ d]; | |
135 | k[i] = d; | |
136 | } | |
d02b48c6 | 137 | |
0f113f3e MC |
138 | /* copy from bytes into RC2_INT's */ |
139 | ki = &(key->data[63]); | |
140 | for (i = 127; i >= 0; i -= 2) | |
141 | *(ki--) = ((k[i] << 8) | k[i - 1]) & 0xffff; | |
142 | } | |
d02b48c6 | 143 | |
0491e058 | 144 | #if defined(_MSC_VER) |
0f113f3e | 145 | # pragma optimize("",on) |
0491e058 | 146 | #endif |