Import OpenSSL-1.0.0b.
[dragonfly.git] / crypto / openssl / crypto / md32_common.h
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1/* crypto/md32_common.h */
2/* ====================================================================
2e6ca3d0 3 * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
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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 *
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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;
2e6ca3d0 75 * either {
56276539 76 * HASH_LONG data[HASH_LBLOCK];
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77 * unsigned char data[HASH_CBLOCK];
78 * };
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79 * unsigned int num;
80 * ...
81 * } HASH_CTX;
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82 * data[] vector is expected to be zeroed upon first call to
83 * HASH_UPDATE.
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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.
56276539 90 * HASH_BLOCK_DATA_ORDER
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91 * name of "block" function capable of treating *unaligned* input
92 * message in original (data) byte order, implemented externally.
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93 * HASH_MAKE_STRING
94 * macro convering context variables to an ASCII hash string.
95 *
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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
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104 * #define HASH_UPDATE MD5_Update
105 * #define HASH_TRANSFORM MD5_Transform
106 * #define HASH_FINAL MD5_Final
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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
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136#ifndef HASH_BLOCK_DATA_ORDER
137#error "HASH_BLOCK_DATA_ORDER must be defined!"
138#endif
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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) \
9f1859dd 168 : "I"(n), "0"((unsigned int)(a)) \
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169 : "cc"); \
170 ret; \
171 })
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172# elif defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
173 defined(__powerpc) || defined(__ppc__) || defined(__powerpc64__)
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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 })
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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 })
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188# endif
189# endif
190#endif /* PEDANTIC */
191
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192#ifndef ROTATE
193#define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
194#endif
195
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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)
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200# if ((defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)) || \
201 (defined(__x86_64) || defined(__x86_64__))
2e6ca3d0 202# if !defined(B_ENDIAN)
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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; })
2e6ca3d0 215# endif
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216# endif
217# endif
218#endif
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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
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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
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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
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241#ifndef PEDANTIC
242# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
243# if defined(__s390x__)
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244# define HOST_c2l(c,l) ({ asm ("lrv %0,%1" \
245 :"=d"(l) :"m"(*(const unsigned int *)(c)));\
2e6ca3d0 246 (c)+=4; (l); })
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247# define HOST_l2c(l,c) ({ asm ("strv %1,%0" \
248 :"=m"(*(unsigned int *)(c)) :"d"(l));\
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249 (c)+=4; (l); })
250# endif
251# endif
252#endif
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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
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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_;
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285 unsigned char *p;
286 HASH_LONG l;
287 size_t n;
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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++;
919b01cc 296 c->Nh+=(HASH_LONG)(len>>29); /* might cause compiler warning on 16-bit */
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297 c->Nl=l;
298
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299 n = c->num;
300 if (n != 0)
56276539 301 {
2e6ca3d0 302 p=(unsigned char *)c->data;
56276539 303
683caddb 304 if (len >= HASH_CBLOCK || len+n >= HASH_CBLOCK)
56276539 305 {
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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 */
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313 }
314 else
315 {
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316 memcpy (p+n,data,len);
317 c->num += (unsigned int)len;
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318 return 1;
319 }
320 }
321
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322 n = len/HASH_CBLOCK;
323 if (n > 0)
56276539 324 {
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325 HASH_BLOCK_DATA_ORDER (c,data,n);
326 n *= HASH_CBLOCK;
327 data += n;
328 len -= n;
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329 }
330
2e6ca3d0 331 if (len != 0)
56276539 332 {
2e6ca3d0 333 p = (unsigned char *)c->data;
919b01cc 334 c->num = (unsigned int)len;
2e6ca3d0 335 memcpy (p,data,len);
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336 }
337 return 1;
338 }
339
340
341void HASH_TRANSFORM (HASH_CTX *c, const unsigned char *data)
342 {
56276539 343 HASH_BLOCK_DATA_ORDER (c,data,1);
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344 }
345
346
347int HASH_FINAL (unsigned char *md, HASH_CTX *c)
348 {
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349 unsigned char *p = (unsigned char *)c->data;
350 size_t n = c->num;
56276539 351
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352 p[n] = 0x80; /* there is always room for one */
353 n++;
354
355 if (n > (HASH_CBLOCK-8))
56276539 356 {
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357 memset (p+n,0,HASH_CBLOCK-n);
358 n=0;
359 HASH_BLOCK_DATA_ORDER (c,p,1);
56276539 360 }
2e6ca3d0 361 memset (p+n,0,HASH_CBLOCK-8-n);
56276539 362
2e6ca3d0 363 p += HASH_CBLOCK-8;
56276539 364#if defined(DATA_ORDER_IS_BIG_ENDIAN)
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365 (void)HOST_l2c(c->Nh,p);
366 (void)HOST_l2c(c->Nl,p);
56276539 367#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
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368 (void)HOST_l2c(c->Nl,p);
369 (void)HOST_l2c(c->Nh,p);
56276539 370#endif
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371 p -= HASH_CBLOCK;
372 HASH_BLOCK_DATA_ORDER (c,p,1);
373 c->num=0;
374 memset (p,0,HASH_CBLOCK);
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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
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382 return 1;
383 }
384
385#ifndef MD32_REG_T
9f1859dd 386#if defined(__alpha) || defined(__sparcv9) || defined(__mips)
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387#define MD32_REG_T long
388/*
389 * This comment was originaly written for MD5, which is why it
390 * discusses A-D. But it basically applies to all 32-bit digests,
391 * which is why it was moved to common header file.
392 *
393 * In case you wonder why A-D are declared as long and not
394 * as MD5_LONG. Doing so results in slight performance
395 * boost on LP64 architectures. The catch is we don't
396 * really care if 32 MSBs of a 64-bit register get polluted
397 * with eventual overflows as we *save* only 32 LSBs in
398 * *either* case. Now declaring 'em long excuses the compiler
399 * from keeping 32 MSBs zeroed resulting in 13% performance
400 * improvement under SPARC Solaris7/64 and 5% under AlphaLinux.
401 * Well, to be honest it should say that this *prevents*
402 * performance degradation.
403 * <appro@fy.chalmers.se>
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404 */
405#else
406/*
407 * Above is not absolute and there are LP64 compilers that
408 * generate better code if MD32_REG_T is defined int. The above
409 * pre-processor condition reflects the circumstances under which
410 * the conclusion was made and is subject to further extension.
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411 * <appro@fy.chalmers.se>
412 */
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413#define MD32_REG_T int
414#endif
56276539 415#endif