xref: /freebsd/lib/libmd/rmd160c.c (revision da5432eda807c4b7232d030d5157d5b417ea4f52)
1 /* crypto/ripemd/rmd_dgst.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  *
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  *
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  *
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the routines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  *
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  *
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 
59 #include <sys/cdefs.h>
60 #include <sys/types.h>
61 
62 #include <stdio.h>
63 #include <string.h>
64 
65 #if 0
66 #include <machine/ansi.h>	/* we use the __ variants of bit-sized types */
67 #endif
68 #include <machine/endian.h>
69 
70 #include "rmd_locl.h"
71 
72 /*
73  * The assembly-language code is not position-independent, so don't
74  * try to use it in a shared library.
75  */
76 #ifdef PIC
77 #undef RMD160_ASM
78 #endif
79 
80 char *RMD160_version="RIPEMD160 part of SSLeay 0.9.0b 11-Oct-1998";
81 
82 #ifdef RMD160_ASM
83 void ripemd160_block_x86(RIPEMD160_CTX *c, const u_int32_t *p,int num);
84 #define ripemd160_block ripemd160_block_x86
85 #else
86 void ripemd160_block(RIPEMD160_CTX *c, const u_int32_t *p,int num);
87 #endif
88 
89 void RIPEMD160_Init(RIPEMD160_CTX *c)
90 	{
91 	c->A=RIPEMD160_A;
92 	c->B=RIPEMD160_B;
93 	c->C=RIPEMD160_C;
94 	c->D=RIPEMD160_D;
95 	c->E=RIPEMD160_E;
96 	c->Nl=0;
97 	c->Nh=0;
98 	c->num=0;
99 	}
100 
101 void RIPEMD160_Update(RIPEMD160_CTX *c, const void *in, size_t len)
102 	{
103 	u_int32_t *p;
104 	int sw,sc;
105 	u_int32_t l;
106 	const unsigned char *data = in;
107 
108 	if (len == 0) return;
109 
110 	l=(c->Nl+(len<<3))&0xffffffffL;
111 	if (l < c->Nl) /* overflow */
112 		c->Nh++;
113 	c->Nh+=(len>>29);
114 	c->Nl=l;
115 
116 	if (c->num != 0)
117 		{
118 		p=c->data;
119 		sw=c->num>>2;
120 		sc=c->num&0x03;
121 
122 		if ((c->num+len) >= RIPEMD160_CBLOCK)
123 			{
124 			l= p[sw];
125 			p_c2l(data,l,sc);
126 			p[sw++]=l;
127 			for (; sw<RIPEMD160_LBLOCK; sw++)
128 				{
129 				c2l(data,l);
130 				p[sw]=l;
131 				}
132 			len-=(RIPEMD160_CBLOCK-c->num);
133 
134 			ripemd160_block(c,p,64);
135 			c->num=0;
136 			/* drop through and do the rest */
137 			}
138 		else
139 			{
140 			int ew,ec;
141 
142 			c->num+=(int)len;
143 			if ((sc+len) < 4) /* ugly, add char's to a word */
144 				{
145 				l= p[sw];
146 				p_c2l_p(data,l,sc,len);
147 				p[sw]=l;
148 				}
149 			else
150 				{
151 				ew=(c->num>>2);
152 				ec=(c->num&0x03);
153 				l= p[sw];
154 				p_c2l(data,l,sc);
155 				p[sw++]=l;
156 				for (; sw < ew; sw++)
157 					{ c2l(data,l); p[sw]=l; }
158 				if (ec)
159 					{
160 					c2l_p(data,l,ec);
161 					p[sw]=l;
162 					}
163 				}
164 			return;
165 			}
166 		}
167 	/* we now can process the input data in blocks of RIPEMD160_CBLOCK
168 	 * chars and save the leftovers to c->data. */
169 #if BYTE_ORDER == LITTLE_ENDIAN
170 	if ((((unsigned long)data)%sizeof(u_int32_t)) == 0)
171 		{
172 		sw=(int)len/RIPEMD160_CBLOCK;
173 		if (sw > 0)
174 			{
175 			sw*=RIPEMD160_CBLOCK;
176 			ripemd160_block(c,(u_int32_t *)data,sw);
177 			data+=sw;
178 			len-=sw;
179 			}
180 		}
181 #endif
182 	p=c->data;
183 	while (len >= RIPEMD160_CBLOCK)
184 		{
185 #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == BIG_ENDIAN
186 		if (p != (u_int32_t *)data)
187 			memcpy(p,data,RIPEMD160_CBLOCK);
188 		data+=RIPEMD160_CBLOCK;
189 #if BYTE_ORDER == BIG_ENDIAN
190 		for (sw=(RIPEMD160_LBLOCK/4); sw; sw--)
191 			{
192 			Endian_Reverse32(p[0]);
193 			Endian_Reverse32(p[1]);
194 			Endian_Reverse32(p[2]);
195 			Endian_Reverse32(p[3]);
196 			p+=4;
197 			}
198 #endif
199 #else
200 		for (sw=(RIPEMD160_LBLOCK/4); sw; sw--)
201 			{
202 			c2l(data,l); *(p++)=l;
203 			c2l(data,l); *(p++)=l;
204 			c2l(data,l); *(p++)=l;
205 			c2l(data,l); *(p++)=l;
206 			}
207 #endif
208 		p=c->data;
209 		ripemd160_block(c,p,64);
210 		len-=RIPEMD160_CBLOCK;
211 		}
212 	sc=(int)len;
213 	c->num=sc;
214 	if (sc)
215 		{
216 		sw=sc>>2;	/* words to copy */
217 #if BYTE_ORDER == LITTLE_ENDIAN
218 		p[sw]=0;
219 		memcpy(p,data,sc);
220 #else
221 		sc&=0x03;
222 		for ( ; sw; sw--)
223 			{ c2l(data,l); *(p++)=l; }
224 		c2l_p(data,l,sc);
225 		*p=l;
226 #endif
227 		}
228 	}
229 
230 void RIPEMD160_Transform(RIPEMD160_CTX *c, unsigned char *b)
231 	{
232 	u_int32_t p[16];
233 #if BYTE_ORDER != LITTLE_ENDIAN
234 	u_int32_t *q;
235 	int i;
236 #endif
237 
238 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN
239 	memcpy(p,b,64);
240 #if BYTE_ORDER == BIG_ENDIAN
241 	q=p;
242 	for (i=(RIPEMD160_LBLOCK/4); i; i--)
243 		{
244 		Endian_Reverse32(q[0]);
245 		Endian_Reverse32(q[1]);
246 		Endian_Reverse32(q[2]);
247 		Endian_Reverse32(q[3]);
248 		q+=4;
249 		}
250 #endif
251 #else
252 	q=p;
253 	for (i=(RIPEMD160_LBLOCK/4); i; i--)
254 		{
255 		u_int32_t l;
256 		c2l(b,l); *(q++)=l;
257 		c2l(b,l); *(q++)=l;
258 		c2l(b,l); *(q++)=l;
259 		c2l(b,l); *(q++)=l;
260 		}
261 #endif
262 	ripemd160_block(c,p,64);
263 	}
264 
265 #ifndef RMD160_ASM
266 
267 void ripemd160_block(RIPEMD160_CTX *ctx, const u_int32_t *X, int num)
268 	{
269 	u_int32_t A,B,C,D,E;
270 	u_int32_t a,b,c,d,e;
271 
272 	for (;;)
273 		{
274 		A=ctx->A; B=ctx->B; C=ctx->C; D=ctx->D; E=ctx->E;
275 
276 	RIP1(A,B,C,D,E,WL00,SL00);
277 	RIP1(E,A,B,C,D,WL01,SL01);
278 	RIP1(D,E,A,B,C,WL02,SL02);
279 	RIP1(C,D,E,A,B,WL03,SL03);
280 	RIP1(B,C,D,E,A,WL04,SL04);
281 	RIP1(A,B,C,D,E,WL05,SL05);
282 	RIP1(E,A,B,C,D,WL06,SL06);
283 	RIP1(D,E,A,B,C,WL07,SL07);
284 	RIP1(C,D,E,A,B,WL08,SL08);
285 	RIP1(B,C,D,E,A,WL09,SL09);
286 	RIP1(A,B,C,D,E,WL10,SL10);
287 	RIP1(E,A,B,C,D,WL11,SL11);
288 	RIP1(D,E,A,B,C,WL12,SL12);
289 	RIP1(C,D,E,A,B,WL13,SL13);
290 	RIP1(B,C,D,E,A,WL14,SL14);
291 	RIP1(A,B,C,D,E,WL15,SL15);
292 
293 	RIP2(E,A,B,C,D,WL16,SL16,KL1);
294 	RIP2(D,E,A,B,C,WL17,SL17,KL1);
295 	RIP2(C,D,E,A,B,WL18,SL18,KL1);
296 	RIP2(B,C,D,E,A,WL19,SL19,KL1);
297 	RIP2(A,B,C,D,E,WL20,SL20,KL1);
298 	RIP2(E,A,B,C,D,WL21,SL21,KL1);
299 	RIP2(D,E,A,B,C,WL22,SL22,KL1);
300 	RIP2(C,D,E,A,B,WL23,SL23,KL1);
301 	RIP2(B,C,D,E,A,WL24,SL24,KL1);
302 	RIP2(A,B,C,D,E,WL25,SL25,KL1);
303 	RIP2(E,A,B,C,D,WL26,SL26,KL1);
304 	RIP2(D,E,A,B,C,WL27,SL27,KL1);
305 	RIP2(C,D,E,A,B,WL28,SL28,KL1);
306 	RIP2(B,C,D,E,A,WL29,SL29,KL1);
307 	RIP2(A,B,C,D,E,WL30,SL30,KL1);
308 	RIP2(E,A,B,C,D,WL31,SL31,KL1);
309 
310 	RIP3(D,E,A,B,C,WL32,SL32,KL2);
311 	RIP3(C,D,E,A,B,WL33,SL33,KL2);
312 	RIP3(B,C,D,E,A,WL34,SL34,KL2);
313 	RIP3(A,B,C,D,E,WL35,SL35,KL2);
314 	RIP3(E,A,B,C,D,WL36,SL36,KL2);
315 	RIP3(D,E,A,B,C,WL37,SL37,KL2);
316 	RIP3(C,D,E,A,B,WL38,SL38,KL2);
317 	RIP3(B,C,D,E,A,WL39,SL39,KL2);
318 	RIP3(A,B,C,D,E,WL40,SL40,KL2);
319 	RIP3(E,A,B,C,D,WL41,SL41,KL2);
320 	RIP3(D,E,A,B,C,WL42,SL42,KL2);
321 	RIP3(C,D,E,A,B,WL43,SL43,KL2);
322 	RIP3(B,C,D,E,A,WL44,SL44,KL2);
323 	RIP3(A,B,C,D,E,WL45,SL45,KL2);
324 	RIP3(E,A,B,C,D,WL46,SL46,KL2);
325 	RIP3(D,E,A,B,C,WL47,SL47,KL2);
326 
327 	RIP4(C,D,E,A,B,WL48,SL48,KL3);
328 	RIP4(B,C,D,E,A,WL49,SL49,KL3);
329 	RIP4(A,B,C,D,E,WL50,SL50,KL3);
330 	RIP4(E,A,B,C,D,WL51,SL51,KL3);
331 	RIP4(D,E,A,B,C,WL52,SL52,KL3);
332 	RIP4(C,D,E,A,B,WL53,SL53,KL3);
333 	RIP4(B,C,D,E,A,WL54,SL54,KL3);
334 	RIP4(A,B,C,D,E,WL55,SL55,KL3);
335 	RIP4(E,A,B,C,D,WL56,SL56,KL3);
336 	RIP4(D,E,A,B,C,WL57,SL57,KL3);
337 	RIP4(C,D,E,A,B,WL58,SL58,KL3);
338 	RIP4(B,C,D,E,A,WL59,SL59,KL3);
339 	RIP4(A,B,C,D,E,WL60,SL60,KL3);
340 	RIP4(E,A,B,C,D,WL61,SL61,KL3);
341 	RIP4(D,E,A,B,C,WL62,SL62,KL3);
342 	RIP4(C,D,E,A,B,WL63,SL63,KL3);
343 
344 	RIP5(B,C,D,E,A,WL64,SL64,KL4);
345 	RIP5(A,B,C,D,E,WL65,SL65,KL4);
346 	RIP5(E,A,B,C,D,WL66,SL66,KL4);
347 	RIP5(D,E,A,B,C,WL67,SL67,KL4);
348 	RIP5(C,D,E,A,B,WL68,SL68,KL4);
349 	RIP5(B,C,D,E,A,WL69,SL69,KL4);
350 	RIP5(A,B,C,D,E,WL70,SL70,KL4);
351 	RIP5(E,A,B,C,D,WL71,SL71,KL4);
352 	RIP5(D,E,A,B,C,WL72,SL72,KL4);
353 	RIP5(C,D,E,A,B,WL73,SL73,KL4);
354 	RIP5(B,C,D,E,A,WL74,SL74,KL4);
355 	RIP5(A,B,C,D,E,WL75,SL75,KL4);
356 	RIP5(E,A,B,C,D,WL76,SL76,KL4);
357 	RIP5(D,E,A,B,C,WL77,SL77,KL4);
358 	RIP5(C,D,E,A,B,WL78,SL78,KL4);
359 	RIP5(B,C,D,E,A,WL79,SL79,KL4);
360 
361 	a=A; b=B; c=C; d=D; e=E;
362 	/* Do other half */
363 	A=ctx->A; B=ctx->B; C=ctx->C; D=ctx->D; E=ctx->E;
364 
365 	RIP5(A,B,C,D,E,WR00,SR00,KR0);
366 	RIP5(E,A,B,C,D,WR01,SR01,KR0);
367 	RIP5(D,E,A,B,C,WR02,SR02,KR0);
368 	RIP5(C,D,E,A,B,WR03,SR03,KR0);
369 	RIP5(B,C,D,E,A,WR04,SR04,KR0);
370 	RIP5(A,B,C,D,E,WR05,SR05,KR0);
371 	RIP5(E,A,B,C,D,WR06,SR06,KR0);
372 	RIP5(D,E,A,B,C,WR07,SR07,KR0);
373 	RIP5(C,D,E,A,B,WR08,SR08,KR0);
374 	RIP5(B,C,D,E,A,WR09,SR09,KR0);
375 	RIP5(A,B,C,D,E,WR10,SR10,KR0);
376 	RIP5(E,A,B,C,D,WR11,SR11,KR0);
377 	RIP5(D,E,A,B,C,WR12,SR12,KR0);
378 	RIP5(C,D,E,A,B,WR13,SR13,KR0);
379 	RIP5(B,C,D,E,A,WR14,SR14,KR0);
380 	RIP5(A,B,C,D,E,WR15,SR15,KR0);
381 
382 	RIP4(E,A,B,C,D,WR16,SR16,KR1);
383 	RIP4(D,E,A,B,C,WR17,SR17,KR1);
384 	RIP4(C,D,E,A,B,WR18,SR18,KR1);
385 	RIP4(B,C,D,E,A,WR19,SR19,KR1);
386 	RIP4(A,B,C,D,E,WR20,SR20,KR1);
387 	RIP4(E,A,B,C,D,WR21,SR21,KR1);
388 	RIP4(D,E,A,B,C,WR22,SR22,KR1);
389 	RIP4(C,D,E,A,B,WR23,SR23,KR1);
390 	RIP4(B,C,D,E,A,WR24,SR24,KR1);
391 	RIP4(A,B,C,D,E,WR25,SR25,KR1);
392 	RIP4(E,A,B,C,D,WR26,SR26,KR1);
393 	RIP4(D,E,A,B,C,WR27,SR27,KR1);
394 	RIP4(C,D,E,A,B,WR28,SR28,KR1);
395 	RIP4(B,C,D,E,A,WR29,SR29,KR1);
396 	RIP4(A,B,C,D,E,WR30,SR30,KR1);
397 	RIP4(E,A,B,C,D,WR31,SR31,KR1);
398 
399 	RIP3(D,E,A,B,C,WR32,SR32,KR2);
400 	RIP3(C,D,E,A,B,WR33,SR33,KR2);
401 	RIP3(B,C,D,E,A,WR34,SR34,KR2);
402 	RIP3(A,B,C,D,E,WR35,SR35,KR2);
403 	RIP3(E,A,B,C,D,WR36,SR36,KR2);
404 	RIP3(D,E,A,B,C,WR37,SR37,KR2);
405 	RIP3(C,D,E,A,B,WR38,SR38,KR2);
406 	RIP3(B,C,D,E,A,WR39,SR39,KR2);
407 	RIP3(A,B,C,D,E,WR40,SR40,KR2);
408 	RIP3(E,A,B,C,D,WR41,SR41,KR2);
409 	RIP3(D,E,A,B,C,WR42,SR42,KR2);
410 	RIP3(C,D,E,A,B,WR43,SR43,KR2);
411 	RIP3(B,C,D,E,A,WR44,SR44,KR2);
412 	RIP3(A,B,C,D,E,WR45,SR45,KR2);
413 	RIP3(E,A,B,C,D,WR46,SR46,KR2);
414 	RIP3(D,E,A,B,C,WR47,SR47,KR2);
415 
416 	RIP2(C,D,E,A,B,WR48,SR48,KR3);
417 	RIP2(B,C,D,E,A,WR49,SR49,KR3);
418 	RIP2(A,B,C,D,E,WR50,SR50,KR3);
419 	RIP2(E,A,B,C,D,WR51,SR51,KR3);
420 	RIP2(D,E,A,B,C,WR52,SR52,KR3);
421 	RIP2(C,D,E,A,B,WR53,SR53,KR3);
422 	RIP2(B,C,D,E,A,WR54,SR54,KR3);
423 	RIP2(A,B,C,D,E,WR55,SR55,KR3);
424 	RIP2(E,A,B,C,D,WR56,SR56,KR3);
425 	RIP2(D,E,A,B,C,WR57,SR57,KR3);
426 	RIP2(C,D,E,A,B,WR58,SR58,KR3);
427 	RIP2(B,C,D,E,A,WR59,SR59,KR3);
428 	RIP2(A,B,C,D,E,WR60,SR60,KR3);
429 	RIP2(E,A,B,C,D,WR61,SR61,KR3);
430 	RIP2(D,E,A,B,C,WR62,SR62,KR3);
431 	RIP2(C,D,E,A,B,WR63,SR63,KR3);
432 
433 	RIP1(B,C,D,E,A,WR64,SR64);
434 	RIP1(A,B,C,D,E,WR65,SR65);
435 	RIP1(E,A,B,C,D,WR66,SR66);
436 	RIP1(D,E,A,B,C,WR67,SR67);
437 	RIP1(C,D,E,A,B,WR68,SR68);
438 	RIP1(B,C,D,E,A,WR69,SR69);
439 	RIP1(A,B,C,D,E,WR70,SR70);
440 	RIP1(E,A,B,C,D,WR71,SR71);
441 	RIP1(D,E,A,B,C,WR72,SR72);
442 	RIP1(C,D,E,A,B,WR73,SR73);
443 	RIP1(B,C,D,E,A,WR74,SR74);
444 	RIP1(A,B,C,D,E,WR75,SR75);
445 	RIP1(E,A,B,C,D,WR76,SR76);
446 	RIP1(D,E,A,B,C,WR77,SR77);
447 	RIP1(C,D,E,A,B,WR78,SR78);
448 	RIP1(B,C,D,E,A,WR79,SR79);
449 
450 	D     =ctx->B+c+D;
451 	ctx->B=ctx->C+d+E;
452 	ctx->C=ctx->D+e+A;
453 	ctx->D=ctx->E+a+B;
454 	ctx->E=ctx->A+b+C;
455 	ctx->A=D;
456 
457 	X+=16;
458 	num-=64;
459 	if (num <= 0) break;
460 		}
461 	}
462 #endif
463 
464 void RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c)
465 	{
466 	int i,j;
467 	u_int32_t l;
468 	u_int32_t *p;
469 	static unsigned char end[4]={0x80,0x00,0x00,0x00};
470 	unsigned char *cp=end;
471 
472 	/* c->num should definitly have room for at least one more byte. */
473 	p=c->data;
474 	j=c->num;
475 	i=j>>2;
476 
477 	/* purify often complains about the following line as an
478 	 * Uninitialized Memory Read.  While this can be true, the
479 	 * following p_c2l macro will reset l when that case is true.
480 	 * This is because j&0x03 contains the number of 'valid' bytes
481 	 * already in p[i].  If and only if j&0x03 == 0, the UMR will
482 	 * occur but this is also the only time p_c2l will do
483 	 * l= *(cp++) instead of l|= *(cp++)
484 	 * Many thanks to Alex Tang <altitude@cic.net> for pickup this
485 	 * 'potential bug' */
486 #ifdef PURIFY
487 	if ((j&0x03) == 0) p[i]=0;
488 #endif
489 	l=p[i];
490 	p_c2l(cp,l,j&0x03);
491 	p[i]=l;
492 	i++;
493 	/* i is the next 'undefined word' */
494 	if (c->num >= RIPEMD160_LAST_BLOCK)
495 		{
496 		for (; i<RIPEMD160_LBLOCK; i++)
497 			p[i]=0;
498 		ripemd160_block(c,p,64);
499 		i=0;
500 		}
501 	for (; i<(RIPEMD160_LBLOCK-2); i++)
502 		p[i]=0;
503 	p[RIPEMD160_LBLOCK-2]=c->Nl;
504 	p[RIPEMD160_LBLOCK-1]=c->Nh;
505 	ripemd160_block(c,p,64);
506 	cp=md;
507 	l=c->A; l2c(l,cp);
508 	l=c->B; l2c(l,cp);
509 	l=c->C; l2c(l,cp);
510 	l=c->D; l2c(l,cp);
511 	l=c->E; l2c(l,cp);
512 
513 	/* Clear the context state */
514 	explicit_bzero(&c, sizeof(c));
515 	}
516 
517 #ifdef undef
518 int printit(unsigned long *l)
519 	{
520 	int i,ii;
521 
522 	for (i=0; i<2; i++)
523 		{
524 		for (ii=0; ii<8; ii++)
525 			{
526 			fprintf(stderr,"%08lx ",l[i*8+ii]);
527 			}
528 		fprintf(stderr,"\n");
529 		}
530 	}
531 #endif
532 
533 #ifdef WEAK_REFS
534 /* When building libmd, provide weak references. Note: this is not
535    activated in the context of compiling these sources for internal
536    use in libcrypt.
537  */
538 #undef RIPEMD160_Init
539 __weak_reference(_libmd_RIPEMD160_Init, RIPEMD160_Init);
540 #undef RIPEMD160_Update
541 __weak_reference(_libmd_RIPEMD160_Update, RIPEMD160_Update);
542 #undef RIPEMD160_Final
543 __weak_reference(_libmd_RIPEMD160_Final, RIPEMD160_Final);
544 #undef RIPEMD160_Transform
545 __weak_reference(_libmd_RIPEMD160_Transform, RIPEMD160_Transform);
546 #undef RMD160_version
547 __weak_reference(_libmd_RMD160_version, RMD160_version);
548 #undef ripemd160_block
549 __weak_reference(_libmd_ripemd160_block, ripemd160_block);
550 #endif
551