Annotation of embedaddon/dhcp/dst/md5_locl.h, revision 1.1.1.1
1.1 misho 1: /* crypto/md/md5_locl.h */
2: /* Copyright (C) 1995-1997 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: /*
60: * Portions Copyright (c) 2007,2009
61: * by Internet Systems Consortium, Inc. ("ISC")
62: *
63: * Permission to use, copy, modify, and distribute this software for any
64: * purpose with or without fee is hereby granted, provided that the above
65: * copyright notice and this permission notice appear in all copies.
66: *
67: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
68: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
69: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
70: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
71: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
72: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
73: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
74: *
75: * Internet Systems Consortium, Inc.
76: * 950 Charter Street
77: * Redwood City, CA 94063
78: * <info@isc.org>
79: * https://www.isc.org/
80: */
81:
82: #include <stdlib.h>
83: #include <string.h>
84: #include "md5.h"
85:
86: #define ULONG unsigned long
87: #define UCHAR unsigned char
88: #define UINT unsigned int
89:
90: #if defined(NOCONST)
91: #define const
92: #endif
93:
94: #undef c2l
95: #define c2l(c,l) (l = ((unsigned long)(*((c)++))) , \
96: l|=(((unsigned long)(*((c)++)))<< 8), \
97: l|=(((unsigned long)(*((c)++)))<<16), \
98: l|=(((unsigned long)(*((c)++)))<<24))
99:
100: #undef p_c2l
101: #define p_c2l(c,l,n) { \
102: switch (n) { \
103: case 0: l =((unsigned long)(*((c)++))); \
104: case 1: l|=((unsigned long)(*((c)++)))<< 8; \
105: case 2: l|=((unsigned long)(*((c)++)))<<16; \
106: case 3: l|=((unsigned long)(*((c)++)))<<24; \
107: } \
108: }
109:
110: /* NOTE the pointer is not incremented at the end of this */
111: #undef c2l_p
112: #define c2l_p(c,l,n) { \
113: l=0; \
114: (c)+=n; \
115: switch (n) { \
116: case 3: l =((unsigned long)(*(--(c))))<<16; \
117: case 2: l|=((unsigned long)(*(--(c))))<< 8; \
118: case 1: l|=((unsigned long)(*(--(c)))) ; \
119: } \
120: }
121:
122: #undef p_c2l_p
123: #define p_c2l_p(c,l,sc,len) { \
124: switch (sc) \
125: { \
126: case 0: l =((unsigned long)(*((c)++))); \
127: if (--len == 0) break; \
128: case 1: l|=((unsigned long)(*((c)++)))<< 8; \
129: if (--len == 0) break; \
130: case 2: l|=((unsigned long)(*((c)++)))<<16; \
131: } \
132: }
133:
134: #undef l2c
135: #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
136: *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
137: *((c)++)=(unsigned char)(((l)>>16)&0xff), \
138: *((c)++)=(unsigned char)(((l)>>24)&0xff))
139:
140: /* NOTE - c is not incremented as per l2c */
141: #undef l2cn
142: #define l2cn(l1,l2,c,n) { \
143: c+=n; \
144: switch (n) { \
145: case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
146: case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
147: case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
148: case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
149: case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
150: case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
151: case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
152: case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
153: } \
154: }
155:
156: /* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */
157: #if defined(WIN32)
158: /* 5 instructions with rotate instruction, else 9 */
159: #define Endian_Reverse32(a) \
160: { \
161: unsigned long l=(a); \
162: (a)=((ROTATE(l,8)&0x00FF00FF)|(ROTATE(l,24)&0xFF00FF00)); \
163: }
164: #else
165: /* 6 instructions with rotate instruction, else 8 */
166: #define Endian_Reverse32(a) \
167: { \
168: unsigned long l=(a); \
169: l=(((l&0xFF00FF00)>>8L)|((l&0x00FF00FF)<<8L)); \
170: (a)=ROTATE(l,16L); \
171: }
172: #endif
173: /*
174: #define F(x,y,z) (((x) & (y)) | ((~(x)) & (z)))
175: #define G(x,y,z) (((x) & (z)) | ((y) & (~(z))))
176: */
177:
178: /* As pointed out by Wei Dai <weidai@eskimo.com>, the above can be
179: * simplified to the code below. Wei attributes these optimizations
180: * to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
181: */
182: #define F(x,y,z) ((((y) ^ (z)) & (x)) ^ (z))
183: #define G(x,y,z) ((((x) ^ (y)) & (z)) ^ (y))
184: #define H(x,y,z) ((x) ^ (y) ^ (z))
185: #define I(x,y,z) (((x) | (~(z))) ^ (y))
186:
187: #undef ROTATE
188: #if defined(WIN32)
189: #define ROTATE(a,n) _lrotl(a,n)
190: #else
191: #define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
192: #endif
193:
194: #define LOCL_R0(a,b,c,d,k,s,t) { \
195: a+=((k)+(t)+F((b),(c),(d))); \
196: a=ROTATE(a,s); \
197: a+=b; };\
198:
199: #define LOCL_R1(a,b,c,d,k,s,t) { \
200: a+=((k)+(t)+G((b),(c),(d))); \
201: a=ROTATE(a,s); \
202: a+=b; };
203:
204: #define LOCL_R2(a,b,c,d,k,s,t) { \
205: a+=((k)+(t)+H((b),(c),(d))); \
206: a=ROTATE(a,s); \
207: a+=b; };
208:
209: #define LOCL_R3(a,b,c,d,k,s,t) { \
210: a+=((k)+(t)+I((b),(c),(d))); \
211: a=ROTATE(a,s); \
212: a+=b; };
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