Annotation of embedaddon/dhcp/dst/md5_locl.h, revision 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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