164 lines
6.6 KiB
C
164 lines
6.6 KiB
C
/* crypto/md5/md5_locl.h */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/md5.h>
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#ifndef MD5_LONG_LOG2
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#define MD5_LONG_LOG2 2 /* default to 32 bits */
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#endif
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#ifdef MD5_ASM
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# if defined(__i386) || defined(WIN32)
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# define md5_block_host_order md5_block_asm_host_order
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# elif defined(__sparc) && defined(ULTRASPARC)
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void md5_block_asm_data_order_aligned (MD5_CTX *c, const MD5_LONG *p,int num);
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# define HASH_BLOCK_DATA_ORDER_ALIGNED md5_block_asm_data_order_aligned
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# endif
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#endif
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void md5_block_host_order (MD5_CTX *c, const MD5_LONG *p,int num);
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void md5_block_data_order (MD5_CTX *c, const unsigned char *p,int num);
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#if defined(__i386)
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/*
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* *_block_host_order is expected to handle aligned data while
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* *_block_data_order - unaligned. As algorithm and host (x86)
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* are in this case of the same "endianess" these two are
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* otherwise indistinguishable. But normally you don't want to
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* call the same function because unaligned access in places
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* where alignment is expected is usually a "Bad Thing". Indeed,
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* on RISCs you get punished with BUS ERROR signal or *severe*
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* performance degradation. Intel CPUs are in turn perfectly
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* capable of loading unaligned data without such drastic side
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* effect. Yes, they say it's slower than aligned load, but no
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* exception is generated and therefore performance degradation
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* is *incomparable* with RISCs. What we should weight here is
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* costs of unaligned access against costs of aligning data.
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* According to my measurements allowing unaligned access results
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* in ~9% performance improvement on Pentium II operating at
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* 266MHz. I won't be surprised if the difference will be higher
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* on faster systems:-)
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*
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* <appro@fy.chalmers.se>
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*/
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#define md5_block_data_order md5_block_host_order
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#endif
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#define DATA_ORDER_IS_LITTLE_ENDIAN
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#define HASH_LONG MD5_LONG
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#define HASH_LONG_LOG2 MD5_LONG_LOG2
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#define HASH_CTX MD5_CTX
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#define HASH_CBLOCK MD5_CBLOCK
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#define HASH_LBLOCK MD5_LBLOCK
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#define HASH_UPDATE MD5_Update
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#define HASH_TRANSFORM MD5_Transform
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#define HASH_FINAL MD5_Final
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#define HASH_BLOCK_HOST_ORDER md5_block_host_order
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#if defined(B_ENDIAN) || defined(md5_block_data_order)
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#define HASH_BLOCK_DATA_ORDER md5_block_data_order
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/*
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* Little-endians (Intel and Alpha) feel better without this.
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* It looks like memcpy does better job than generic
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* md5_block_data_order on copying-n-aligning input data.
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* But franlky speaking I didn't expect such result on Alpha.
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* On the other hand I've got this with egcs-1.0.2 and if
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* program is compiled with another (better?) compiler it
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* might turn out other way around.
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*
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* <appro@fy.chalmers.se>
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*/
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#endif
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#include "../md32_common.h"
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/*
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#define F(x,y,z) (((x) & (y)) | ((~(x)) & (z)))
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#define G(x,y,z) (((x) & (z)) | ((y) & (~(z))))
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*/
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/* As pointed out by Wei Dai <weidai@eskimo.com>, the above can be
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* simplified to the code below. Wei attributes these optimisations
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* to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
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*/
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#define F(b,c,d) ((((c) ^ (d)) & (b)) ^ (d))
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#define G(b,c,d) ((((b) ^ (c)) & (d)) ^ (c))
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#define H(b,c,d) ((b) ^ (c) ^ (d))
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#define I(b,c,d) (((~(d)) | (b)) ^ (c))
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#define R0(a,b,c,d,k,s,t) { \
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a+=((k)+(t)+F((b),(c),(d))); \
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a=ROTATE(a,s); \
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a+=b; };\
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#define R1(a,b,c,d,k,s,t) { \
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a+=((k)+(t)+G((b),(c),(d))); \
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a=ROTATE(a,s); \
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a+=b; };
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#define R2(a,b,c,d,k,s,t) { \
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a+=((k)+(t)+H((b),(c),(d))); \
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a=ROTATE(a,s); \
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a+=b; };
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#define R3(a,b,c,d,k,s,t) { \
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a+=((k)+(t)+I((b),(c),(d))); \
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a=ROTATE(a,s); \
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a+=b; };
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