xref: /freebsd/lib/libmd/rmd160c.c (revision 1da7f3f6f72b2245e458fc7195733268ae4a1136)
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/types.h>
60 
61 #include <stdio.h>
62 #include <string.h>
63 
64 #if 0
65 #include <machine/ansi.h>	/* we use the __ variants of bit-sized types */
66 #endif
67 #include <machine/endian.h>
68 
69 #include "rmd_locl.h"
70 
71 /*
72  * The assembly-language code is not position-independent, so don't
73  * try to use it in a shared library.
74  */
75 #ifdef PIC
76 #undef RMD160_ASM
77 #endif
78 
79 char *RMD160_version="RIPEMD160 part of SSLeay 0.9.0b 11-Oct-1998";
80 
81 #ifdef RMD160_ASM
82 void ripemd160_block_x86(RIPEMD160_CTX *c, const u_int32_t *p,int num);
83 #define ripemd160_block ripemd160_block_x86
84 #else
85 void ripemd160_block(RIPEMD160_CTX *c, const u_int32_t *p,int num);
86 #endif
87 
88 void RIPEMD160_Init(RIPEMD160_CTX *c)
89 	{
90 	c->A=RIPEMD160_A;
91 	c->B=RIPEMD160_B;
92 	c->C=RIPEMD160_C;
93 	c->D=RIPEMD160_D;
94 	c->E=RIPEMD160_E;
95 	c->Nl=0;
96 	c->Nh=0;
97 	c->num=0;
98 	}
99 
100 void RIPEMD160_Update(RIPEMD160_CTX *c, const void *in, size_t len)
101 	{
102 	u_int32_t *p;
103 	int sw,sc;
104 	u_int32_t l;
105 	const unsigned char *data = in;
106 
107 	if (len == 0) return;
108 
109 	l=(c->Nl+(len<<3))&0xffffffffL;
110 	if (l < c->Nl) /* overflow */
111 		c->Nh++;
112 	c->Nh+=(len>>29);
113 	c->Nl=l;
114 
115 	if (c->num != 0)
116 		{
117 		p=c->data;
118 		sw=c->num>>2;
119 		sc=c->num&0x03;
120 
121 		if ((c->num+len) >= RIPEMD160_CBLOCK)
122 			{
123 			l= p[sw];
124 			p_c2l(data,l,sc);
125 			p[sw++]=l;
126 			for (; sw<RIPEMD160_LBLOCK; sw++)
127 				{
128 				c2l(data,l);
129 				p[sw]=l;
130 				}
131 			len-=(RIPEMD160_CBLOCK-c->num);
132 
133 			ripemd160_block(c,p,64);
134 			c->num=0;
135 			/* drop through and do the rest */
136 			}
137 		else
138 			{
139 			int ew,ec;
140 
141 			c->num+=(int)len;
142 			if ((sc+len) < 4) /* ugly, add char's to a word */
143 				{
144 				l= p[sw];
145 				p_c2l_p(data,l,sc,len);
146 				p[sw]=l;
147 				}
148 			else
149 				{
150 				ew=(c->num>>2);
151 				ec=(c->num&0x03);
152 				l= p[sw];
153 				p_c2l(data,l,sc);
154 				p[sw++]=l;
155 				for (; sw < ew; sw++)
156 					{ c2l(data,l); p[sw]=l; }
157 				if (ec)
158 					{
159 					c2l_p(data,l,ec);
160 					p[sw]=l;
161 					}
162 				}
163 			return;
164 			}
165 		}
166 	/* we now can process the input data in blocks of RIPEMD160_CBLOCK
167 	 * chars and save the leftovers to c->data. */
168 #if BYTE_ORDER == LITTLE_ENDIAN
169 	if ((((unsigned long)data)%sizeof(u_int32_t)) == 0)
170 		{
171 		sw=(int)len/RIPEMD160_CBLOCK;
172 		if (sw > 0)
173 			{
174 			sw*=RIPEMD160_CBLOCK;
175 			ripemd160_block(c,(u_int32_t *)data,sw);
176 			data+=sw;
177 			len-=sw;
178 			}
179 		}
180 #endif
181 	p=c->data;
182 	while (len >= RIPEMD160_CBLOCK)
183 		{
184 #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == BIG_ENDIAN
185 		if (p != (u_int32_t *)data)
186 			memcpy(p,data,RIPEMD160_CBLOCK);
187 		data+=RIPEMD160_CBLOCK;
188 #if BYTE_ORDER == BIG_ENDIAN
189 		for (sw=(RIPEMD160_LBLOCK/4); sw; sw--)
190 			{
191 			Endian_Reverse32(p[0]);
192 			Endian_Reverse32(p[1]);
193 			Endian_Reverse32(p[2]);
194 			Endian_Reverse32(p[3]);
195 			p+=4;
196 			}
197 #endif
198 #else
199 		for (sw=(RIPEMD160_LBLOCK/4); sw; sw--)
200 			{
201 			c2l(data,l); *(p++)=l;
202 			c2l(data,l); *(p++)=l;
203 			c2l(data,l); *(p++)=l;
204 			c2l(data,l); *(p++)=l;
205 			}
206 #endif
207 		p=c->data;
208 		ripemd160_block(c,p,64);
209 		len-=RIPEMD160_CBLOCK;
210 		}
211 	sc=(int)len;
212 	c->num=sc;
213 	if (sc)
214 		{
215 		sw=sc>>2;	/* words to copy */
216 #if BYTE_ORDER == LITTLE_ENDIAN
217 		p[sw]=0;
218 		memcpy(p,data,sc);
219 #else
220 		sc&=0x03;
221 		for ( ; sw; sw--)
222 			{ c2l(data,l); *(p++)=l; }
223 		c2l_p(data,l,sc);
224 		*p=l;
225 #endif
226 		}
227 	}
228 
229 void RIPEMD160_Transform(RIPEMD160_CTX *c, unsigned char *b)
230 	{
231 	u_int32_t p[16];
232 #if BYTE_ORDER != LITTLE_ENDIAN
233 	u_int32_t *q;
234 	int i;
235 #endif
236 
237 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN
238 	memcpy(p,b,64);
239 #if BYTE_ORDER == BIG_ENDIAN
240 	q=p;
241 	for (i=(RIPEMD160_LBLOCK/4); i; i--)
242 		{
243 		Endian_Reverse32(q[0]);
244 		Endian_Reverse32(q[1]);
245 		Endian_Reverse32(q[2]);
246 		Endian_Reverse32(q[3]);
247 		q+=4;
248 		}
249 #endif
250 #else
251 	q=p;
252 	for (i=(RIPEMD160_LBLOCK/4); i; i--)
253 		{
254 		u_int32_t l;
255 		c2l(b,l); *(q++)=l;
256 		c2l(b,l); *(q++)=l;
257 		c2l(b,l); *(q++)=l;
258 		c2l(b,l); *(q++)=l;
259 		}
260 #endif
261 	ripemd160_block(c,p,64);
262 	}
263 
264 #ifndef RMD160_ASM
265 
266 void ripemd160_block(RIPEMD160_CTX *ctx, const u_int32_t *X, int num)
267 	{
268 	u_int32_t A,B,C,D,E;
269 	u_int32_t a,b,c,d,e;
270 
271 	for (;;)
272 		{
273 		A=ctx->A; B=ctx->B; C=ctx->C; D=ctx->D; E=ctx->E;
274 
275 	RIP1(A,B,C,D,E,WL00,SL00);
276 	RIP1(E,A,B,C,D,WL01,SL01);
277 	RIP1(D,E,A,B,C,WL02,SL02);
278 	RIP1(C,D,E,A,B,WL03,SL03);
279 	RIP1(B,C,D,E,A,WL04,SL04);
280 	RIP1(A,B,C,D,E,WL05,SL05);
281 	RIP1(E,A,B,C,D,WL06,SL06);
282 	RIP1(D,E,A,B,C,WL07,SL07);
283 	RIP1(C,D,E,A,B,WL08,SL08);
284 	RIP1(B,C,D,E,A,WL09,SL09);
285 	RIP1(A,B,C,D,E,WL10,SL10);
286 	RIP1(E,A,B,C,D,WL11,SL11);
287 	RIP1(D,E,A,B,C,WL12,SL12);
288 	RIP1(C,D,E,A,B,WL13,SL13);
289 	RIP1(B,C,D,E,A,WL14,SL14);
290 	RIP1(A,B,C,D,E,WL15,SL15);
291 
292 	RIP2(E,A,B,C,D,WL16,SL16,KL1);
293 	RIP2(D,E,A,B,C,WL17,SL17,KL1);
294 	RIP2(C,D,E,A,B,WL18,SL18,KL1);
295 	RIP2(B,C,D,E,A,WL19,SL19,KL1);
296 	RIP2(A,B,C,D,E,WL20,SL20,KL1);
297 	RIP2(E,A,B,C,D,WL21,SL21,KL1);
298 	RIP2(D,E,A,B,C,WL22,SL22,KL1);
299 	RIP2(C,D,E,A,B,WL23,SL23,KL1);
300 	RIP2(B,C,D,E,A,WL24,SL24,KL1);
301 	RIP2(A,B,C,D,E,WL25,SL25,KL1);
302 	RIP2(E,A,B,C,D,WL26,SL26,KL1);
303 	RIP2(D,E,A,B,C,WL27,SL27,KL1);
304 	RIP2(C,D,E,A,B,WL28,SL28,KL1);
305 	RIP2(B,C,D,E,A,WL29,SL29,KL1);
306 	RIP2(A,B,C,D,E,WL30,SL30,KL1);
307 	RIP2(E,A,B,C,D,WL31,SL31,KL1);
308 
309 	RIP3(D,E,A,B,C,WL32,SL32,KL2);
310 	RIP3(C,D,E,A,B,WL33,SL33,KL2);
311 	RIP3(B,C,D,E,A,WL34,SL34,KL2);
312 	RIP3(A,B,C,D,E,WL35,SL35,KL2);
313 	RIP3(E,A,B,C,D,WL36,SL36,KL2);
314 	RIP3(D,E,A,B,C,WL37,SL37,KL2);
315 	RIP3(C,D,E,A,B,WL38,SL38,KL2);
316 	RIP3(B,C,D,E,A,WL39,SL39,KL2);
317 	RIP3(A,B,C,D,E,WL40,SL40,KL2);
318 	RIP3(E,A,B,C,D,WL41,SL41,KL2);
319 	RIP3(D,E,A,B,C,WL42,SL42,KL2);
320 	RIP3(C,D,E,A,B,WL43,SL43,KL2);
321 	RIP3(B,C,D,E,A,WL44,SL44,KL2);
322 	RIP3(A,B,C,D,E,WL45,SL45,KL2);
323 	RIP3(E,A,B,C,D,WL46,SL46,KL2);
324 	RIP3(D,E,A,B,C,WL47,SL47,KL2);
325 
326 	RIP4(C,D,E,A,B,WL48,SL48,KL3);
327 	RIP4(B,C,D,E,A,WL49,SL49,KL3);
328 	RIP4(A,B,C,D,E,WL50,SL50,KL3);
329 	RIP4(E,A,B,C,D,WL51,SL51,KL3);
330 	RIP4(D,E,A,B,C,WL52,SL52,KL3);
331 	RIP4(C,D,E,A,B,WL53,SL53,KL3);
332 	RIP4(B,C,D,E,A,WL54,SL54,KL3);
333 	RIP4(A,B,C,D,E,WL55,SL55,KL3);
334 	RIP4(E,A,B,C,D,WL56,SL56,KL3);
335 	RIP4(D,E,A,B,C,WL57,SL57,KL3);
336 	RIP4(C,D,E,A,B,WL58,SL58,KL3);
337 	RIP4(B,C,D,E,A,WL59,SL59,KL3);
338 	RIP4(A,B,C,D,E,WL60,SL60,KL3);
339 	RIP4(E,A,B,C,D,WL61,SL61,KL3);
340 	RIP4(D,E,A,B,C,WL62,SL62,KL3);
341 	RIP4(C,D,E,A,B,WL63,SL63,KL3);
342 
343 	RIP5(B,C,D,E,A,WL64,SL64,KL4);
344 	RIP5(A,B,C,D,E,WL65,SL65,KL4);
345 	RIP5(E,A,B,C,D,WL66,SL66,KL4);
346 	RIP5(D,E,A,B,C,WL67,SL67,KL4);
347 	RIP5(C,D,E,A,B,WL68,SL68,KL4);
348 	RIP5(B,C,D,E,A,WL69,SL69,KL4);
349 	RIP5(A,B,C,D,E,WL70,SL70,KL4);
350 	RIP5(E,A,B,C,D,WL71,SL71,KL4);
351 	RIP5(D,E,A,B,C,WL72,SL72,KL4);
352 	RIP5(C,D,E,A,B,WL73,SL73,KL4);
353 	RIP5(B,C,D,E,A,WL74,SL74,KL4);
354 	RIP5(A,B,C,D,E,WL75,SL75,KL4);
355 	RIP5(E,A,B,C,D,WL76,SL76,KL4);
356 	RIP5(D,E,A,B,C,WL77,SL77,KL4);
357 	RIP5(C,D,E,A,B,WL78,SL78,KL4);
358 	RIP5(B,C,D,E,A,WL79,SL79,KL4);
359 
360 	a=A; b=B; c=C; d=D; e=E;
361 	/* Do other half */
362 	A=ctx->A; B=ctx->B; C=ctx->C; D=ctx->D; E=ctx->E;
363 
364 	RIP5(A,B,C,D,E,WR00,SR00,KR0);
365 	RIP5(E,A,B,C,D,WR01,SR01,KR0);
366 	RIP5(D,E,A,B,C,WR02,SR02,KR0);
367 	RIP5(C,D,E,A,B,WR03,SR03,KR0);
368 	RIP5(B,C,D,E,A,WR04,SR04,KR0);
369 	RIP5(A,B,C,D,E,WR05,SR05,KR0);
370 	RIP5(E,A,B,C,D,WR06,SR06,KR0);
371 	RIP5(D,E,A,B,C,WR07,SR07,KR0);
372 	RIP5(C,D,E,A,B,WR08,SR08,KR0);
373 	RIP5(B,C,D,E,A,WR09,SR09,KR0);
374 	RIP5(A,B,C,D,E,WR10,SR10,KR0);
375 	RIP5(E,A,B,C,D,WR11,SR11,KR0);
376 	RIP5(D,E,A,B,C,WR12,SR12,KR0);
377 	RIP5(C,D,E,A,B,WR13,SR13,KR0);
378 	RIP5(B,C,D,E,A,WR14,SR14,KR0);
379 	RIP5(A,B,C,D,E,WR15,SR15,KR0);
380 
381 	RIP4(E,A,B,C,D,WR16,SR16,KR1);
382 	RIP4(D,E,A,B,C,WR17,SR17,KR1);
383 	RIP4(C,D,E,A,B,WR18,SR18,KR1);
384 	RIP4(B,C,D,E,A,WR19,SR19,KR1);
385 	RIP4(A,B,C,D,E,WR20,SR20,KR1);
386 	RIP4(E,A,B,C,D,WR21,SR21,KR1);
387 	RIP4(D,E,A,B,C,WR22,SR22,KR1);
388 	RIP4(C,D,E,A,B,WR23,SR23,KR1);
389 	RIP4(B,C,D,E,A,WR24,SR24,KR1);
390 	RIP4(A,B,C,D,E,WR25,SR25,KR1);
391 	RIP4(E,A,B,C,D,WR26,SR26,KR1);
392 	RIP4(D,E,A,B,C,WR27,SR27,KR1);
393 	RIP4(C,D,E,A,B,WR28,SR28,KR1);
394 	RIP4(B,C,D,E,A,WR29,SR29,KR1);
395 	RIP4(A,B,C,D,E,WR30,SR30,KR1);
396 	RIP4(E,A,B,C,D,WR31,SR31,KR1);
397 
398 	RIP3(D,E,A,B,C,WR32,SR32,KR2);
399 	RIP3(C,D,E,A,B,WR33,SR33,KR2);
400 	RIP3(B,C,D,E,A,WR34,SR34,KR2);
401 	RIP3(A,B,C,D,E,WR35,SR35,KR2);
402 	RIP3(E,A,B,C,D,WR36,SR36,KR2);
403 	RIP3(D,E,A,B,C,WR37,SR37,KR2);
404 	RIP3(C,D,E,A,B,WR38,SR38,KR2);
405 	RIP3(B,C,D,E,A,WR39,SR39,KR2);
406 	RIP3(A,B,C,D,E,WR40,SR40,KR2);
407 	RIP3(E,A,B,C,D,WR41,SR41,KR2);
408 	RIP3(D,E,A,B,C,WR42,SR42,KR2);
409 	RIP3(C,D,E,A,B,WR43,SR43,KR2);
410 	RIP3(B,C,D,E,A,WR44,SR44,KR2);
411 	RIP3(A,B,C,D,E,WR45,SR45,KR2);
412 	RIP3(E,A,B,C,D,WR46,SR46,KR2);
413 	RIP3(D,E,A,B,C,WR47,SR47,KR2);
414 
415 	RIP2(C,D,E,A,B,WR48,SR48,KR3);
416 	RIP2(B,C,D,E,A,WR49,SR49,KR3);
417 	RIP2(A,B,C,D,E,WR50,SR50,KR3);
418 	RIP2(E,A,B,C,D,WR51,SR51,KR3);
419 	RIP2(D,E,A,B,C,WR52,SR52,KR3);
420 	RIP2(C,D,E,A,B,WR53,SR53,KR3);
421 	RIP2(B,C,D,E,A,WR54,SR54,KR3);
422 	RIP2(A,B,C,D,E,WR55,SR55,KR3);
423 	RIP2(E,A,B,C,D,WR56,SR56,KR3);
424 	RIP2(D,E,A,B,C,WR57,SR57,KR3);
425 	RIP2(C,D,E,A,B,WR58,SR58,KR3);
426 	RIP2(B,C,D,E,A,WR59,SR59,KR3);
427 	RIP2(A,B,C,D,E,WR60,SR60,KR3);
428 	RIP2(E,A,B,C,D,WR61,SR61,KR3);
429 	RIP2(D,E,A,B,C,WR62,SR62,KR3);
430 	RIP2(C,D,E,A,B,WR63,SR63,KR3);
431 
432 	RIP1(B,C,D,E,A,WR64,SR64);
433 	RIP1(A,B,C,D,E,WR65,SR65);
434 	RIP1(E,A,B,C,D,WR66,SR66);
435 	RIP1(D,E,A,B,C,WR67,SR67);
436 	RIP1(C,D,E,A,B,WR68,SR68);
437 	RIP1(B,C,D,E,A,WR69,SR69);
438 	RIP1(A,B,C,D,E,WR70,SR70);
439 	RIP1(E,A,B,C,D,WR71,SR71);
440 	RIP1(D,E,A,B,C,WR72,SR72);
441 	RIP1(C,D,E,A,B,WR73,SR73);
442 	RIP1(B,C,D,E,A,WR74,SR74);
443 	RIP1(A,B,C,D,E,WR75,SR75);
444 	RIP1(E,A,B,C,D,WR76,SR76);
445 	RIP1(D,E,A,B,C,WR77,SR77);
446 	RIP1(C,D,E,A,B,WR78,SR78);
447 	RIP1(B,C,D,E,A,WR79,SR79);
448 
449 	D     =ctx->B+c+D;
450 	ctx->B=ctx->C+d+E;
451 	ctx->C=ctx->D+e+A;
452 	ctx->D=ctx->E+a+B;
453 	ctx->E=ctx->A+b+C;
454 	ctx->A=D;
455 
456 	X+=16;
457 	num-=64;
458 	if (num <= 0) break;
459 		}
460 	}
461 #endif
462 
463 void RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c)
464 	{
465 	int i,j;
466 	u_int32_t l;
467 	u_int32_t *p;
468 	static unsigned char end[4]={0x80,0x00,0x00,0x00};
469 	unsigned char *cp=end;
470 
471 	/* c->num should definitly have room for at least one more byte. */
472 	p=c->data;
473 	j=c->num;
474 	i=j>>2;
475 
476 	/* purify often complains about the following line as an
477 	 * Uninitialized Memory Read.  While this can be true, the
478 	 * following p_c2l macro will reset l when that case is true.
479 	 * This is because j&0x03 contains the number of 'valid' bytes
480 	 * already in p[i].  If and only if j&0x03 == 0, the UMR will
481 	 * occur but this is also the only time p_c2l will do
482 	 * l= *(cp++) instead of l|= *(cp++)
483 	 * Many thanks to Alex Tang <altitude@cic.net> for pickup this
484 	 * 'potential bug' */
485 #ifdef PURIFY
486 	if ((j&0x03) == 0) p[i]=0;
487 #endif
488 	l=p[i];
489 	p_c2l(cp,l,j&0x03);
490 	p[i]=l;
491 	i++;
492 	/* i is the next 'undefined word' */
493 	if (c->num >= RIPEMD160_LAST_BLOCK)
494 		{
495 		for (; i<RIPEMD160_LBLOCK; i++)
496 			p[i]=0;
497 		ripemd160_block(c,p,64);
498 		i=0;
499 		}
500 	for (; i<(RIPEMD160_LBLOCK-2); i++)
501 		p[i]=0;
502 	p[RIPEMD160_LBLOCK-2]=c->Nl;
503 	p[RIPEMD160_LBLOCK-1]=c->Nh;
504 	ripemd160_block(c,p,64);
505 	cp=md;
506 	l=c->A; l2c(l,cp);
507 	l=c->B; l2c(l,cp);
508 	l=c->C; l2c(l,cp);
509 	l=c->D; l2c(l,cp);
510 	l=c->E; l2c(l,cp);
511 
512 	/* Clear the context state */
513 	explicit_bzero(&c, sizeof(c));
514 	}
515 
516 #ifdef undef
517 int printit(unsigned long *l)
518 	{
519 	int i,ii;
520 
521 	for (i=0; i<2; i++)
522 		{
523 		for (ii=0; ii<8; ii++)
524 			{
525 			fprintf(stderr,"%08lx ",l[i*8+ii]);
526 			}
527 		fprintf(stderr,"\n");
528 		}
529 	}
530 #endif
531 
532 #ifdef WEAK_REFS
533 /* When building libmd, provide weak references. Note: this is not
534    activated in the context of compiling these sources for internal
535    use in libcrypt.
536  */
537 #undef RIPEMD160_Init
538 __weak_reference(_libmd_RIPEMD160_Init, RIPEMD160_Init);
539 #undef RIPEMD160_Update
540 __weak_reference(_libmd_RIPEMD160_Update, RIPEMD160_Update);
541 #undef RIPEMD160_Final
542 __weak_reference(_libmd_RIPEMD160_Final, RIPEMD160_Final);
543 #undef RIPEMD160_Transform
544 __weak_reference(_libmd_RIPEMD160_Transform, RIPEMD160_Transform);
545 #undef RMD160_version
546 __weak_reference(_libmd_RMD160_version, RMD160_version);
547 #undef ripemd160_block
548 __weak_reference(_libmd_ripemd160_block, ripemd160_block);
549 #endif
550