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rc2_skey.c

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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-
63static 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 */-
94void 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 k= (unsigned char *)&(key->data[0]);-
102 *k=0; /* for if there is a zero length key */-
103-
104 if (len > 128) len=128;
never executed: len=128;
len > 128Description
TRUEnever evaluated
FALSEevaluated 28 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
0-28
105 if (bits <= 0) bits=1024;
executed 4 times by 1 test: bits=1024;
Executed by:
  • rc2test
bits <= 0Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • rc2test
FALSEevaluated 24 times by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
4-24
106 if (bits > 1024) bits=1024;
never executed: bits=1024;
bits > 1024Description
TRUEnever evaluated
FALSEevaluated 28 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
0-28
107-
108 for (i=0; i<len; i++)
i<lenDescription
TRUEevaluated 372 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
FALSEevaluated 28 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
28-372
109 k[i]=data[i];
executed 372 times by 2 tests: k[i]=data[i];
Executed by:
  • libcrypto.so.44.0.1
  • rc2test
372
110-
111 /* expand table */-
112 d=k[len-1];-
113 j=0;-
114 for (i=len; i < 128; i++,j++)
i < 128Description
TRUEevaluated 3212 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
FALSEevaluated 28 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
28-3212
115 {-
116 d=key_table[(k[j]+d)&0xff];-
117 k[i]=d;-
118 }
executed 3212 times by 2 tests: end of block
Executed by:
  • libcrypto.so.44.0.1
  • rc2test
3212
119-
120 /* hmm.... key reduction to 'bits' bits */-
121-
122 j=(bits+7)>>3;-
123 i=128-j;-
124 c= (0xff>>(-bits & 0x07));-
125-
126 d=key_table[k[i]&c];-
127 k[i]=d;-
128 while (i--)
i--Description
TRUEevaluated 2764 times by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
FALSEevaluated 28 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
28-2764
129 {-
130 d=key_table[k[i+j]^d];-
131 k[i]=d;-
132 }
executed 2764 times by 1 test: end of block
Executed by:
  • libcrypto.so.44.0.1
2764
133-
134 /* copy from bytes into RC2_INT's */-
135 ki= &(key->data[63]);-
136 for (i=127; i>=0; i-=2)
i>=0Description
TRUEevaluated 1792 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
FALSEevaluated 28 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • rc2test
28-1792
137 *(ki--)=((k[i]<<8)|k[i-1])&0xffff;
executed 1792 times by 2 tests: *(ki--)=((k[i]<<8)|k[i-1])&0xffff;
Executed by:
  • libcrypto.so.44.0.1
  • rc2test
1792
138 }
executed 28 times by 2 tests: end of block
Executed by:
  • libcrypto.so.44.0.1
  • rc2test
28
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