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source: trunk/sys/libcrypto/include/openssl/md32_common.h @ 76

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1	/* crypto/md32_common.h */
2	/* ====================================================================
3	* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
4	*
5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions
7	* are met:
8	*
9	* 1. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	*
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in
14	* the documentation and/or other materials provided with the
15	* distribution.
16	*
17	* 3. All advertising materials mentioning features or use of this
18	* software must display the following acknowledgment:
19	* "This product includes software developed by the OpenSSL Project
20	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21	*
22	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23	* endorse or promote products derived from this software without
24	* prior written permission. For written permission, please contact
25	* licensing@OpenSSL.org.
26	*
27	* 5. Products derived from this software may not be called "OpenSSL"
28	* nor may "OpenSSL" appear in their names without prior written
29	* permission of the OpenSSL Project.
30	*
31	* 6. Redistributions of any form whatsoever must retain the following
32	* acknowledgment:
33	* "This product includes software developed by the OpenSSL Project
34	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35	*
36	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47	* OF THE POSSIBILITY OF SUCH DAMAGE.
48	* ====================================================================
49	*
50	*/
51
52	/*
53	* This is a generic 32 bit "collector" for message digest algorithms.
54	* Whenever needed it collects input character stream into chunks of
55	* 32 bit values and invokes a block function that performs actual hash
56	* calculations.
57	*
58	* Porting guide.
59	*
60	* Obligatory macros:
61	*
62	* DATA_ORDER_IS_BIG_ENDIAN or DATA_ORDER_IS_LITTLE_ENDIAN
63	* this macro defines byte order of input stream.
64	* HASH_CBLOCK
65	* size of a unit chunk HASH_BLOCK operates on.
66	* HASH_LONG
67	* has to be at lest 32 bit wide, if it's wider, then
68	* HASH_LONG_LOG2 has to be defined along
69	* HASH_CTX
70	* context structure that at least contains following
71	* members:
72	* typedef struct {
73	* ...
74	* HASH_LONG Nl,Nh;
75	* either {
76	* HASH_LONG data[HASH_LBLOCK];
77	* unsigned char data[HASH_CBLOCK];
78	* };
79	* unsigned int num;
80	* ...
81	* } HASH_CTX;
82	* data[] vector is expected to be zeroed upon first call to
83	* HASH_UPDATE.
84	* HASH_UPDATE
85	* name of "Update" function, implemented here.
86	* HASH_TRANSFORM
87	* name of "Transform" function, implemented here.
88	* HASH_FINAL
89	* name of "Final" function, implemented here.
90	* HASH_BLOCK_DATA_ORDER
91	* name of "block" function capable of treating unaligned input
92	* message in original (data) byte order, implemented externally.
93	* HASH_MAKE_STRING
94	* macro convering context variables to an ASCII hash string.
95	*
96	* MD5 example:
97	*
98	* #define DATA_ORDER_IS_LITTLE_ENDIAN
99	*
100	* #define HASH_LONG MD5_LONG
101	* #define HASH_LONG_LOG2 MD5_LONG_LOG2
102	* #define HASH_CTX MD5_CTX
103	* #define HASH_CBLOCK MD5_CBLOCK
104	* #define HASH_UPDATE MD5_Update
105	* #define HASH_TRANSFORM MD5_Transform
106	* #define HASH_FINAL MD5_Final
107	* #define HASH_BLOCK_DATA_ORDER md5_block_data_order
108	*
109	* <appro@fy.chalmers.se>
110	*/
111
112	#if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN)
113	#error "DATA_ORDER must be defined!"
114	#endif
115
116	#ifndef HASH_CBLOCK
117	#error "HASH_CBLOCK must be defined!"
118	#endif
119	#ifndef HASH_LONG
120	#error "HASH_LONG must be defined!"
121	#endif
122	#ifndef HASH_CTX
123	#error "HASH_CTX must be defined!"
124	#endif
125
126	#ifndef HASH_UPDATE
127	#error "HASH_UPDATE must be defined!"
128	#endif
129	#ifndef HASH_TRANSFORM
130	#error "HASH_TRANSFORM must be defined!"
131	#endif
132	#ifndef HASH_FINAL
133	#error "HASH_FINAL must be defined!"
134	#endif
135
136	#ifndef HASH_BLOCK_DATA_ORDER
137	#error "HASH_BLOCK_DATA_ORDER must be defined!"
138	#endif
139
140	/*
141	* Engage compiler specific rotate intrinsic function if available.
142	*/
143	#undef ROTATE
144	#ifndef PEDANTIC
145	# if defined(_MSC_VER) \|\| defined(__ICC)
146	# define ROTATE(a,n) _lrotl(a,n)
147	# elif defined(__MWERKS__)
148	# if defined(__POWERPC__)
149	# define ROTATE(a,n) __rlwinm(a,n,0,31)
150	# elif defined(__MC68K__)
151	/* Motorola specific tweak. <appro@fy.chalmers.se> */
152	# define ROTATE(a,n) ( n<24 ? __rol(a,n) : __ror(a,32-n) )
153	# else
154	# define ROTATE(a,n) __rol(a,n)
155	# endif
156	# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
157	/*
158	* Some GNU C inline assembler templates. Note that these are
159	* rotates by constant number of bits! But that's exactly
160	* what we need here...
161	* <appro@fy.chalmers.se>
162	*/
163	# if defined(__i386) \|\| defined(__i386__) \|\| defined(__x86_64) \|\| defined(__x86_64__)
164	# define ROTATE(a,n) ({ register unsigned int ret; \
165	asm ( \
166	"roll %1,%0" \
167	: "=r"(ret) \
168	: "I"(n), "0"(a) \
169	: "cc"); \
170	ret; \
171	})
172	# elif defined(_ARCH_PPC) \|\| defined(_ARCH_PPC64) \|\| \
173	defined(__powerpc) \|\| defined(__ppc__) \|\| defined(__powerpc64__)
174	# define ROTATE(a,n) ({ register unsigned int ret; \
175	asm ( \
176	"rlwinm %0,%1,%2,0,31" \
177	: "=r"(ret) \
178	: "r"(a), "I"(n)); \
179	ret; \
180	})
181	# elif defined(__s390x__)
182	# define ROTATE(a,n) ({ register unsigned int ret; \
183	asm ("rll %0,%1,%2" \
184	: "=r"(ret) \
185	: "r"(a), "I"(n)); \
186	ret; \
187	})
188	# endif
189	# endif
190	#endif /* PEDANTIC */
191
192	#ifndef ROTATE
193	#define ROTATE(a,n) (((a)<<(n))\|(((a)&0xffffffff)>>(32-(n))))
194	#endif
195
196	#if defined(DATA_ORDER_IS_BIG_ENDIAN)
197
198	#ifndef PEDANTIC
199	# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
200	# if ((defined(__i386) \|\| defined(__i386__)) && !defined(I386_ONLY)) \|\| \
201	(defined(__x86_64) \|\| defined(__x86_64__))
202	# if !defined(B_ENDIAN)
203	/*
204	* This gives ~30-40% performance improvement in SHA-256 compiled
205	* with gcc [on P4]. Well, first macro to be frank. We can pull
206	* this trick on x86* platforms only, because these CPUs can fetch
207	* unaligned data without raising an exception.
208	*/
209	# define HOST_c2l(c,l) ({ unsigned int r=((const unsigned int )(c)); \
210	asm ("bswapl %0":"=r"(r):"0"(r)); \
211	(c)+=4; (l)=r; })
212	# define HOST_l2c(l,c) ({ unsigned int r=(l); \
213	asm ("bswapl %0":"=r"(r):"0"(r)); \
214	((unsigned int )(c))=r; (c)+=4; r; })
215	# endif
216	# endif
217	# endif
218	#endif
219	#if defined(__s390__) \|\| defined(__s390x__)
220	# define HOST_c2l(c,l) ((l)=((const unsigned int )(c)), (c)+=4, (l))
221	# define HOST_l2c(l,c) (((unsigned int )(c))=(l), (c)+=4, (l))
222	#endif
223
224	#ifndef HOST_c2l
225	#define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
226	l\|=(((unsigned long)(*((c)++)))<<16), \
227	l\|=(((unsigned long)(*((c)++)))<< 8), \
228	l\|=(((unsigned long)(*((c)++))) ), \
229	l)
230	#endif
231	#ifndef HOST_l2c
232	#define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
233	*((c)++)=(unsigned char)(((l)>>16)&0xff), \
234	*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
235	*((c)++)=(unsigned char)(((l) )&0xff), \
236	l)
237	#endif
238
239	#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
240
241	#ifndef PEDANTIC
242	# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
243	# if defined(__s390x__)
244	# define HOST_c2l(c,l) ({ asm ("lrv %0,0(%1)" \
245	:"=r"(l) : "r"(c)); \
246	(c)+=4; (l); })
247	# define HOST_l2c(l,c) ({ asm ("strv %0,0(%1)" \
248	: : "r"(l),"r"(c) : "memory"); \
249	(c)+=4; (l); })
250	# endif
251	# endif
252	#endif
253	#if defined(__i386) \|\| defined(__i386__) \|\| defined(__x86_64) \|\| defined(__x86_64__)
254	# ifndef B_ENDIAN
255	/* See comment in DATA_ORDER_IS_BIG_ENDIAN section. */
256	# define HOST_c2l(c,l) ((l)=((const unsigned int )(c)), (c)+=4, l)
257	# define HOST_l2c(l,c) (((unsigned int )(c))=(l), (c)+=4, l)
258	# endif
259	#endif
260
261	#ifndef HOST_c2l
262	#define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
263	l\|=(((unsigned long)(*((c)++)))<< 8), \
264	l\|=(((unsigned long)(*((c)++)))<<16), \
265	l\|=(((unsigned long)(*((c)++)))<<24), \
266	l)
267	#endif
268	#ifndef HOST_l2c
269	#define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
270	*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
271	*((c)++)=(unsigned char)(((l)>>16)&0xff), \
272	*((c)++)=(unsigned char)(((l)>>24)&0xff), \
273	l)
274	#endif
275
276	#endif
277
278	/*
279	* Time for some action:-)
280	*/
281
282	int HASH_UPDATE (HASH_CTX c, const void data_, size_t len)
283	{
284	const unsigned char *data=data_;
285	unsigned char *p;
286	HASH_LONG l;
287	size_t n;
288
289	if (len==0) return 1;
290
291	l=(c->Nl+(((HASH_LONG)len)<<3))&0xffffffffUL;
292	/* 95-05-24 eay Fixed a bug with the overflow handling, thanks to
293	* Wei Dai <weidai@eskimo.com> for pointing it out. */
294	if (l < c->Nl) /* overflow */
295	c->Nh++;
296	c->Nh+=(len>>29); /* might cause compiler warning on 16-bit */
297	c->Nl=l;
298
299	n = c->num;
300	if (n != 0)
301	{
302	p=(unsigned char *)c->data;
303
304	if (len >= HASH_CBLOCK \|\| len+n >= HASH_CBLOCK)
305	{
306	memcpy (p+n,data,HASH_CBLOCK-n);
307	HASH_BLOCK_DATA_ORDER (c,p,1);
308	n = HASH_CBLOCK-n;
309	data += n;
310	len -= n;
311	c->num = 0;
312	memset (p,0,HASH_CBLOCK); /* keep it zeroed */
313	}
314	else
315	{
316	memcpy (p+n,data,len);
317	c->num += (unsigned int)len;
318	return 1;
319	}
320	}
321
322	n = len/HASH_CBLOCK;
323	if (n > 0)
324	{
325	HASH_BLOCK_DATA_ORDER (c,data,n);
326	n *= HASH_CBLOCK;
327	data += n;
328	len -= n;
329	}
330
331	if (len != 0)
332	{
333	p = (unsigned char *)c->data;
334	c->num = len;
335	memcpy (p,data,len);
336	}
337	return 1;
338	}
339
340
341	void HASH_TRANSFORM (HASH_CTX c, const unsigned char data)
342	{
343	HASH_BLOCK_DATA_ORDER (c,data,1);
344	}
345
346
347	int HASH_FINAL (unsigned char md, HASH_CTX c)
348	{
349	unsigned char p = (unsigned char )c->data;
350	size_t n = c->num;
351
352	p[n] = 0x80; /* there is always room for one */
353	n++;
354
355	if (n > (HASH_CBLOCK-8))
356	{
357	memset (p+n,0,HASH_CBLOCK-n);
358	n=0;
359	HASH_BLOCK_DATA_ORDER (c,p,1);
360	}
361	memset (p+n,0,HASH_CBLOCK-8-n);
362
363	p += HASH_CBLOCK-8;
364	#if defined(DATA_ORDER_IS_BIG_ENDIAN)
365	(void)HOST_l2c(c->Nh,p);
366	(void)HOST_l2c(c->Nl,p);
367	#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
368	(void)HOST_l2c(c->Nl,p);
369	(void)HOST_l2c(c->Nh,p);
370	#endif
371	p -= HASH_CBLOCK;
372	HASH_BLOCK_DATA_ORDER (c,p,1);
373	c->num=0;
374	memset (p,0,HASH_CBLOCK);
375
376	#ifndef HASH_MAKE_STRING
377	#error "HASH_MAKE_STRING must be defined!"
378	#else
379	HASH_MAKE_STRING(c,md);
380	#endif
381
382	return 1;
383	}
384
385	#ifndef MD32_REG_T
386	#define MD32_REG_T long
387	/*
388	* This comment was originaly written for MD5, which is why it
389	* discusses A-D. But it basically applies to all 32-bit digests,
390	* which is why it was moved to common header file.
391	*
392	* In case you wonder why A-D are declared as long and not
393	* as MD5_LONG. Doing so results in slight performance
394	* boost on LP64 architectures. The catch is we don't
395	* really care if 32 MSBs of a 64-bit register get polluted
396	* with eventual overflows as we save only 32 LSBs in
397	* either case. Now declaring 'em long excuses the compiler
398	* from keeping 32 MSBs zeroed resulting in 13% performance
399	* improvement under SPARC Solaris7/64 and 5% under AlphaLinux.
400	* Well, to be honest it should say that this prevents
401	* performance degradation.
402	* <appro@fy.chalmers.se>
403	* Apparently there're LP64 compilers that generate better
404	* code if A-D are declared int. Most notably GCC-x86_64
405	* generates better code.
406	* <appro@fy.chalmers.se>
407	*/
408	#endif

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