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1 /* crypto/rc2/rc2_skey.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/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 #if defined(_MSC_VER) && defined(_ARM_) | |
89 #pragma optimize("g",off) | |
90 #endif | |
91 | |
92 /* It has come to my attention that there are 2 versions of the RC2 | |
93 * key schedule. One which is normal, and anther which has a hook to | |
94 * use a reduced key length. | |
95 * BSAFE uses the 'retarded' version. What I previously shipped is | |
96 * the same as specifying 1024 for the 'bits' parameter. Bsafe uses | |
97 * a version where the bits parameter is the same as len*8 */ | |
98 void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int bits) | |
99 #ifdef OPENSSL_FIPS | |
100 { | |
101 fips_cipher_abort(RC2); | |
102 private_RC2_set_key(key, len, data, bits); | |
103 } | |
104 void private_RC2_set_key(RC2_KEY *key, int len, const unsigned char *data, int b
its) | |
105 #endif | |
106 { | |
107 int i,j; | |
108 unsigned char *k; | |
109 RC2_INT *ki; | |
110 unsigned int c,d; | |
111 | |
112 k= (unsigned char *)&(key->data[0]); | |
113 *k=0; /* for if there is a zero length key */ | |
114 | |
115 if (len > 128) len=128; | |
116 if (bits <= 0) bits=1024; | |
117 if (bits > 1024) bits=1024; | |
118 | |
119 for (i=0; i<len; i++) | |
120 k[i]=data[i]; | |
121 | |
122 /* expand table */ | |
123 d=k[len-1]; | |
124 j=0; | |
125 for (i=len; i < 128; i++,j++) | |
126 { | |
127 d=key_table[(k[j]+d)&0xff]; | |
128 k[i]=d; | |
129 } | |
130 | |
131 /* hmm.... key reduction to 'bits' bits */ | |
132 | |
133 j=(bits+7)>>3; | |
134 i=128-j; | |
135 c= (0xff>>(-bits & 0x07)); | |
136 | |
137 d=key_table[k[i]&c]; | |
138 k[i]=d; | |
139 while (i--) | |
140 { | |
141 d=key_table[k[i+j]^d]; | |
142 k[i]=d; | |
143 } | |
144 | |
145 /* copy from bytes into RC2_INT's */ | |
146 ki= &(key->data[63]); | |
147 for (i=127; i>=0; i-=2) | |
148 *(ki--)=((k[i]<<8)|k[i-1])&0xffff; | |
149 } | |
150 | |
151 #if defined(_MSC_VER) | |
152 #pragma optimize("",on) | |
153 #endif | |
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