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1.1 root 1: /* crypto/bf/bf_skey.c */
2: /* Copyright (C) 1995-1997 Eric Young ([email protected])
3: * All rights reserved.
4: *
5: * This package is an SSL implementation written
6: * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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 <stdio.h>
60: #include <string.h>
61: #include "blowfish.h"
62: #include "bf_locl.h"
63: #include "bf_pi.h"
64:
65: #pragma intrinsic(memcpy)
66:
67: #pragma warning( disable : 4131 )
68:
69: void _cdecl BF_set_key(key,len,data)
70: BF_KEY *key;
71: int len;
72: unsigned char *data;
73: {
74: int i;
75: BF_LONG *p,ri,in[2];
76: unsigned char *d,*end;
77:
78:
79: memcpy((char *)key,(char *)&bf_init,sizeof(BF_KEY));
80: p=key->P;
81:
82: if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4;
83:
84: d=data;
85: end= &(data[len]);
86: for (i=0; i<(BF_ROUNDS+2); i++)
87: {
88: ri= *(d++);
89: if (d >= end) d=data;
90:
91: ri<<=8;
92: ri|= *(d++);
93: if (d >= end) d=data;
94:
95: ri<<=8;
96: ri|= *(d++);
97: if (d >= end) d=data;
98:
99: ri<<=8;
100: ri|= *(d++);
101: if (d >= end) d=data;
102:
103: p[i]^=ri;
104: }
105:
106: in[0]=0L;
107: in[1]=0L;
108: for (i=0; i<(BF_ROUNDS+2); i+=2)
109: {
110: BF_encrypt(in,key);
111: p[i ]=in[0];
112: p[i+1]=in[1];
113: }
114:
115: p=key->S;
116: for (i=0; i<4*256; i+=2)
117: {
118: BF_encrypt(in,key);
119: p[i ]=in[0];
120: p[i+1]=in[1];
121: }
122: }
123:
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