1 /* ====================================================================
2 * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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22 * endorse or promote products derived from this software without
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26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
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30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
52 * This is a generic 32 bit "collector" for message digest algorithms.
53 * Whenever needed it collects input character stream into chunks of
54 * 32 bit values and invokes a block function that performs actual hash
61 * DATA_ORDER_IS_BIG_ENDIAN or DATA_ORDER_IS_LITTLE_ENDIAN
62 * this macro defines byte order of input stream.
64 * size of a unit chunk HASH_BLOCK operates on.
66 * has to be at lest 32 bit wide.
68 * context structure that at least contains following
74 * HASH_LONG data[HASH_LBLOCK];
75 * unsigned char data[HASH_CBLOCK];
80 * data[] vector is expected to be zeroed upon first call to
83 * name of "Update" function, implemented here.
85 * name of "Transform" function, implemented here.
87 * name of "Final" function, implemented here.
88 * HASH_BLOCK_DATA_ORDER
89 * name of "block" function capable of treating *unaligned* input
90 * message in original (data) byte order, implemented externally.
92 * macro convering context variables to an ASCII hash string.
96 * #define DATA_ORDER_IS_LITTLE_ENDIAN
98 * #define HASH_LONG MD5_LONG
99 * #define HASH_CTX MD5_CTX
100 * #define HASH_CBLOCK MD5_CBLOCK
101 * #define HASH_UPDATE MD5_Update
102 * #define HASH_TRANSFORM MD5_Transform
103 * #define HASH_FINAL MD5_Final
104 * #define HASH_BLOCK_DATA_ORDER md5_block_data_order
106 * <appro@fy.chalmers.se>
109 #if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN)
110 # error "DATA_ORDER must be defined!"
114 # error "HASH_CBLOCK must be defined!"
117 # error "HASH_LONG must be defined!"
120 # error "HASH_CTX must be defined!"
124 # error "HASH_UPDATE must be defined!"
126 #ifndef HASH_TRANSFORM
127 # error "HASH_TRANSFORM must be defined!"
130 # error "HASH_FINAL must be defined!"
133 #ifndef HASH_BLOCK_DATA_ORDER
134 # error "HASH_BLOCK_DATA_ORDER must be defined!"
138 * Engage compiler specific rotate intrinsic function if available.
142 # if defined(_MSC_VER)
143 # define ROTATE(a,n) _lrotl(a,n)
144 # elif defined(__ICC)
145 # define ROTATE(a,n) _rotl(a,n)
146 # elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
148 * Some GNU C inline assembler templates. Note that these are
149 * rotates by *constant* number of bits! But that's exactly
150 * what we need here...
151 * <appro@fy.chalmers.se>
153 # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
154 # define ROTATE(a,n) ({ register unsigned int ret; \
158 : "I"(n), "0"((unsigned int)(a)) \
162 # elif defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
163 defined(__powerpc) || defined(__ppc__) || defined(__powerpc64__)
164 # define ROTATE(a,n) ({ register unsigned int ret; \
166 "rlwinm %0,%1,%2,0,31" \
171 # elif defined(__s390x__)
172 # define ROTATE(a,n) ({ register unsigned int ret; \
173 asm ("rll %0,%1,%2" \
180 #endif /* PEDANTIC */
183 # define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
186 #if defined(DATA_ORDER_IS_BIG_ENDIAN)
189 # if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
190 # if ((defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)) || \
191 (defined(__x86_64) || defined(__x86_64__))
192 # if !defined(B_ENDIAN)
194 * This gives ~30-40% performance improvement in SHA-256 compiled
195 * with gcc [on P4]. Well, first macro to be frank. We can pull
196 * this trick on x86* platforms only, because these CPUs can fetch
197 * unaligned data without raising an exception.
199 # define HOST_c2l(c,l) ({ unsigned int r=*((const unsigned int *)(c)); \
200 asm ("bswapl %0":"=r"(r):"0"(r)); \
202 # define HOST_l2c(l,c) ({ unsigned int r=(l); \
203 asm ("bswapl %0":"=r"(r):"0"(r)); \
204 *((unsigned int *)(c))=r; (c)+=4; r; })
206 # elif defined(__aarch64__)
207 # if defined(__BYTE_ORDER__)
208 # if defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__
209 # define HOST_c2l(c,l) ({ unsigned int r; \
212 :"r"(*((const unsigned int *)(c))));\
214 # define HOST_l2c(l,c) ({ unsigned int r; \
217 :"r"((unsigned int)(l)));\
218 *((unsigned int *)(c))=r; (c)+=4; r; })
219 # elif defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__==__ORDER_BIG_ENDIAN__
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))
226 # if defined(__s390__) || defined(__s390x__)
227 # define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4, (l))
228 # define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4, (l))
233 # define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
234 l|=(((unsigned long)(*((c)++)))<<16), \
235 l|=(((unsigned long)(*((c)++)))<< 8), \
236 l|=(((unsigned long)(*((c)++))) ) )
239 # define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
240 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
241 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
242 *((c)++)=(unsigned char)(((l) )&0xff), \
246 #elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
249 # if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
250 # if defined(__s390x__)
251 # define HOST_c2l(c,l) ({ asm ("lrv %0,%1" \
252 :"=d"(l) :"m"(*(const unsigned int *)(c)));\
254 # define HOST_l2c(l,c) ({ asm ("strv %1,%0" \
255 :"=m"(*(unsigned int *)(c)) :"d"(l));\
259 # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
261 /* See comment in DATA_ORDER_IS_BIG_ENDIAN section. */
262 # define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4, l)
263 # define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4, l)
269 # define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
270 l|=(((unsigned long)(*((c)++)))<< 8), \
271 l|=(((unsigned long)(*((c)++)))<<16), \
272 l|=(((unsigned long)(*((c)++)))<<24) )
275 # define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
276 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
277 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
278 *((c)++)=(unsigned char)(((l)>>24)&0xff), \
285 * Time for some action:-)
288 int HASH_UPDATE(HASH_CTX *c, const void *data_, size_t len)
290 const unsigned char *data = data_;
298 l = (c->Nl + (((HASH_LONG) len) << 3)) & 0xffffffffUL;
300 * 95-05-24 eay Fixed a bug with the overflow handling, thanks to Wei Dai
301 * <weidai@eskimo.com> for pointing it out.
303 if (l < c->Nl) /* overflow */
305 c->Nh += (HASH_LONG) (len >> 29); /* might cause compiler warning on
311 p = (unsigned char *)c->data;
313 if (len >= HASH_CBLOCK || len + n >= HASH_CBLOCK) {
314 memcpy(p + n, data, HASH_CBLOCK - n);
315 HASH_BLOCK_DATA_ORDER(c, p, 1);
320 memset(p, 0, HASH_CBLOCK); /* keep it zeroed */
322 memcpy(p + n, data, len);
323 c->num += (unsigned int)len;
328 n = len / HASH_CBLOCK;
330 HASH_BLOCK_DATA_ORDER(c, data, n);
337 p = (unsigned char *)c->data;
338 c->num = (unsigned int)len;
339 memcpy(p, data, len);
344 void HASH_TRANSFORM(HASH_CTX *c, const unsigned char *data)
346 HASH_BLOCK_DATA_ORDER(c, data, 1);
349 int HASH_FINAL(unsigned char *md, HASH_CTX *c)
351 unsigned char *p = (unsigned char *)c->data;
354 p[n] = 0x80; /* there is always room for one */
357 if (n > (HASH_CBLOCK - 8)) {
358 memset(p + n, 0, HASH_CBLOCK - n);
360 HASH_BLOCK_DATA_ORDER(c, p, 1);
362 memset(p + n, 0, HASH_CBLOCK - 8 - n);
364 p += HASH_CBLOCK - 8;
365 #if defined(DATA_ORDER_IS_BIG_ENDIAN)
366 (void)HOST_l2c(c->Nh, p);
367 (void)HOST_l2c(c->Nl, p);
368 #elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
369 (void)HOST_l2c(c->Nl, p);
370 (void)HOST_l2c(c->Nh, p);
373 HASH_BLOCK_DATA_ORDER(c, p, 1);
375 memset(p, 0, HASH_CBLOCK);
377 #ifndef HASH_MAKE_STRING
378 # error "HASH_MAKE_STRING must be defined!"
380 HASH_MAKE_STRING(c, md);
387 # if defined(__alpha) || defined(__sparcv9) || defined(__mips)
388 # define MD32_REG_T long
390 * This comment was originaly written for MD5, which is why it
391 * discusses A-D. But it basically applies to all 32-bit digests,
392 * which is why it was moved to common header file.
394 * In case you wonder why A-D are declared as long and not
395 * as MD5_LONG. Doing so results in slight performance
396 * boost on LP64 architectures. The catch is we don't
397 * really care if 32 MSBs of a 64-bit register get polluted
398 * with eventual overflows as we *save* only 32 LSBs in
399 * *either* case. Now declaring 'em long excuses the compiler
400 * from keeping 32 MSBs zeroed resulting in 13% performance
401 * improvement under SPARC Solaris7/64 and 5% under AlphaLinux.
402 * Well, to be honest it should say that this *prevents*
403 * performance degradation.
404 * <appro@fy.chalmers.se>
408 * Above is not absolute and there are LP64 compilers that
409 * generate better code if MD32_REG_T is defined int. The above
410 * pre-processor condition reflects the circumstances under which
411 * the conclusion was made and is subject to further extension.
412 * <appro@fy.chalmers.se>
414 # define MD32_REG_T int