117 lines
3.5 KiB
C
Executable File
117 lines
3.5 KiB
C
Executable File
/*
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* Local defines for the md5 functions.
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*
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* $Id: //BBN_Linux/Branch/Branch_for_Rel_TP_ASEAN_20161216/tclinux_phoenix/apps/public/bftpd/md5_loc.h#1 $
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*/
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/*
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* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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* rights reserved.
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*
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* License to copy and use this software is granted provided that it is
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* identified as the "RSA Data Security, Inc. MD5 Message-Digest
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* Algorithm" in all material mentioning or referencing this software
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* or this function.
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*
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* License is also granted to make and use derivative works provided that
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* such works are identified as "derived from the RSA Data Security,
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* Inc. MD5 Message-Digest Algorithm" in all material mentioning or
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* referencing the derived work.
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*
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* RSA Data Security, Inc. makes no representations concerning either the
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* merchantability of this software or the suitability of this
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* software for any particular purpose. It is provided "as is" without
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* express or implied warranty of any kind.
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*
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* These notices must be retained in any copies of any part of this
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* documentation and/or software.
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*/
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#ifndef __MD5_LOC_H__
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#define __MD5_LOC_H__
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#define HEX_STRING "0123456789abcdef" /* to convert to hex */
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#define BLOCK_SIZE_MASK (MD5_BLOCK_SIZE - 1)
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/*
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* Define my endian-ness. Could not do in a portable manner using the
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* include files -- grumble.
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*/
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#if defined(__alpha) || defined(WIN32) || defined(__i386__) || defined(__amd64__)
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/*
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* little endian
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*/
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#define SWAP(n) (n)
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#endif
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#if defined(__sparc) || defined(__powerpc__)
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/*
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* big endian - big is better
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*/
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#define SWAP(n) \
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(((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
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#endif
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/*
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* Risky, but if no endian is defined, assume little endian
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* -- Jesse
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*/
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#ifndef SWAP
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#define SWAP(n) (n)
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#endif
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/*
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* These are the four functions used in the four steps of the MD5
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* algorithm and defined in the RFC 1321. The first function is a
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* little bit optimized (as found in Colin Plumbs public domain
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* implementation).
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*/
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/* #define FF(b, c, d) ((b & c) | (~b & d)) */
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#define FF(b, c, d) (d ^ (b & (c ^ d)))
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#define FG(b, c, d) FF(d, b, c)
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#define FH(b, c, d) (b ^ c ^ d)
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#define FI(b, c, d) (c ^ (b | ~d))
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/*
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* It is unfortunate that C does not provide an operator for cyclic
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* rotation. Hope the C compiler is smart enough. -- Modified to
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* remove the w = at the front - Gray 2/97
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*/
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#define CYCLIC(w, s) ((w << s) | (w >> (32 - s)))
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/*
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* First Round: using the given function, the context and a constant
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* the next context is computed. Because the algorithms processing
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* unit is a 32-bit word and it is determined to work on words in
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* little endian byte order we perhaps have to change the byte order
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* before the computation. To reduce the work for the next steps we
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* store the swapped words in the array CORRECT_WORDS. -- Modified to
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* fix the handling of unaligned buffer spaces - Gray 7/97
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*/
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#define OP1(a, b, c, d, b_p, c_p, s, T) \
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do { \
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memcpy(c_p, b_p, sizeof(md5_uint32)); \
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*c_p = SWAP(*c_p); \
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a += FF (b, c, d) + *c_p + T; \
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a = CYCLIC (a, s); \
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a += b; \
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b_p = (char *)b_p + sizeof(md5_uint32); \
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c_p++; \
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} while (0)
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/*
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* Second to Fourth Round: we have the possibly swapped words in
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* CORRECT_WORDS. Redefine the macro to take an additional first
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* argument specifying the function to use.
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*/
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#define OP234(FUNC, a, b, c, d, k, s, T) \
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do { \
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a += FUNC (b, c, d) + k + T; \
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a = CYCLIC (a, s); \
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a += b; \
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} while (0)
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#endif /* ! __MD5_LOC_H__ */
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