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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
282int 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
341void HASH_TRANSFORM (HASH_CTX *c, const unsigned char *data)
342 {
343 HASH_BLOCK_DATA_ORDER (c,data,1);
344 }
345
346
347int 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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