xref: /freebsd/lib/libmd/rmd160c.c (revision 6e8394b8baa7d5d9153ab90de6824bcd19b3b4e1)
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 rouines 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  *	$Id: rmd160c.c,v 1.2 1999/02/26 20:06:46 wollman Exp $
59  */
60 
61 #include <sys/types.h>
62 
63 #include <stdio.h>
64 #include <string.h>
65 
66 #if 0
67 #include <machine/ansi.h>	/* we use the __ variants of bit-sized types */
68 #endif
69 #include <machine/endian.h>
70 
71 #include "rmd_locl.h"
72 
73 /*
74  * The assembly-language code is not position-independent, so don't
75  * try to use it in a shared library.
76  */
77 #ifdef PIC
78 #undef RMD160_ASM
79 #endif
80 
81 char *RMD160_version="RIPEMD160 part of SSLeay 0.9.0b 11-Oct-1998";
82 
83 #ifdef RMD160_ASM
84 void ripemd160_block_x86(RIPEMD160_CTX *c, const u_int32_t *p,int num);
85 #define ripemd160_block ripemd160_block_x86
86 #else
87 void ripemd160_block(RIPEMD160_CTX *c, const u_int32_t *p,int num);
88 #endif
89 
90 void RIPEMD160_Init(c)
91 RIPEMD160_CTX *c;
92 	{
93 	c->A=RIPEMD160_A;
94 	c->B=RIPEMD160_B;
95 	c->C=RIPEMD160_C;
96 	c->D=RIPEMD160_D;
97 	c->E=RIPEMD160_E;
98 	c->Nl=0;
99 	c->Nh=0;
100 	c->num=0;
101 	}
102 
103 void RIPEMD160_Update(c, data, len)
104 RIPEMD160_CTX *c;
105 const unsigned char *data;
106 size_t len;
107 	{
108 	register u_int32_t *p;
109 	int sw,sc;
110 	u_int32_t l;
111 
112 	if (len == 0) return;
113 
114 	l=(c->Nl+(len<<3))&0xffffffffL;
115 	if (l < c->Nl) /* overflow */
116 		c->Nh++;
117 	c->Nh+=(len>>29);
118 	c->Nl=l;
119 
120 	if (c->num != 0)
121 		{
122 		p=c->data;
123 		sw=c->num>>2;
124 		sc=c->num&0x03;
125 
126 		if ((c->num+len) >= RIPEMD160_CBLOCK)
127 			{
128 			l= p[sw];
129 			p_c2l(data,l,sc);
130 			p[sw++]=l;
131 			for (; sw<RIPEMD160_LBLOCK; sw++)
132 				{
133 				c2l(data,l);
134 				p[sw]=l;
135 				}
136 			len-=(RIPEMD160_CBLOCK-c->num);
137 
138 			ripemd160_block(c,p,64);
139 			c->num=0;
140 			/* drop through and do the rest */
141 			}
142 		else
143 			{
144 			int ew,ec;
145 
146 			c->num+=(int)len;
147 			if ((sc+len) < 4) /* ugly, add char's to a word */
148 				{
149 				l= p[sw];
150 				p_c2l_p(data,l,sc,len);
151 				p[sw]=l;
152 				}
153 			else
154 				{
155 				ew=(c->num>>2);
156 				ec=(c->num&0x03);
157 				l= p[sw];
158 				p_c2l(data,l,sc);
159 				p[sw++]=l;
160 				for (; sw < ew; sw++)
161 					{ c2l(data,l); p[sw]=l; }
162 				if (ec)
163 					{
164 					c2l_p(data,l,ec);
165 					p[sw]=l;
166 					}
167 				}
168 			return;
169 			}
170 		}
171 	/* we now can process the input data in blocks of RIPEMD160_CBLOCK
172 	 * chars and save the leftovers to c->data. */
173 #if BYTE_ORDER == LITTLE_ENDIAN
174 	if ((((unsigned long)data)%sizeof(u_int32_t)) == 0)
175 		{
176 		sw=(int)len/RIPEMD160_CBLOCK;
177 		if (sw > 0)
178 			{
179 			sw*=RIPEMD160_CBLOCK;
180 			ripemd160_block(c,(u_int32_t *)data,sw);
181 			data+=sw;
182 			len-=sw;
183 			}
184 		}
185 #endif
186 	p=c->data;
187 	while (len >= RIPEMD160_CBLOCK)
188 		{
189 #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == BIG_ENDIAN
190 		if (p != (u_int32_t *)data)
191 			memcpy(p,data,RIPEMD160_CBLOCK);
192 		data+=RIPEMD160_CBLOCK;
193 #if BYTE_ORDER == BIG_ENDIAN
194 		for (sw=(RIPEMD160_LBLOCK/4); sw; sw--)
195 			{
196 			Endian_Reverse32(p[0]);
197 			Endian_Reverse32(p[1]);
198 			Endian_Reverse32(p[2]);
199 			Endian_Reverse32(p[3]);
200 			p+=4;
201 			}
202 #endif
203 #else
204 		for (sw=(RIPEMD160_LBLOCK/4); sw; sw--)
205 			{
206 			c2l(data,l); *(p++)=l;
207 			c2l(data,l); *(p++)=l;
208 			c2l(data,l); *(p++)=l;
209 			c2l(data,l); *(p++)=l;
210 			}
211 #endif
212 		p=c->data;
213 		ripemd160_block(c,p,64);
214 		len-=RIPEMD160_CBLOCK;
215 		}
216 	sc=(int)len;
217 	c->num=sc;
218 	if (sc)
219 		{
220 		sw=sc>>2;	/* words to copy */
221 #if BYTE_ORDER == LITTLE_ENDIAN
222 		p[sw]=0;
223 		memcpy(p,data,sc);
224 #else
225 		sc&=0x03;
226 		for ( ; sw; sw--)
227 			{ c2l(data,l); *(p++)=l; }
228 		c2l_p(data,l,sc);
229 		*p=l;
230 #endif
231 		}
232 	}
233 
234 void RIPEMD160_Transform(c,b)
235 RIPEMD160_CTX *c;
236 unsigned char *b;
237 	{
238 	u_int32_t p[16];
239 #if BYTE_ORDER != LITTLE_ENDIAN
240 	u_int32_t *q;
241 	int i;
242 #endif
243 
244 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN
245 	memcpy(p,b,64);
246 #if BYTE_ORDER == BIG_ENDIAN
247 	q=p;
248 	for (i=(RIPEMD160_LBLOCK/4); i; i--)
249 		{
250 		Endian_Reverse32(q[0]);
251 		Endian_Reverse32(q[1]);
252 		Endian_Reverse32(q[2]);
253 		Endian_Reverse32(q[3]);
254 		q+=4;
255 		}
256 #endif
257 #else
258 	q=p;
259 	for (i=(RIPEMD160_LBLOCK/4); i; i--)
260 		{
261 		u_int32_t l;
262 		c2l(b,l); *(q++)=l;
263 		c2l(b,l); *(q++)=l;
264 		c2l(b,l); *(q++)=l;
265 		c2l(b,l); *(q++)=l;
266 		}
267 #endif
268 	ripemd160_block(c,p,64);
269 	}
270 
271 #ifndef RMD160_ASM
272 
273 void ripemd160_block(ctx, X, num)
274 RIPEMD160_CTX *ctx;
275 const u_int32_t *X;
276 int num;
277 	{
278 	register u_int32_t A,B,C,D,E;
279 	u_int32_t a,b,c,d,e;
280 
281 	for (;;)
282 		{
283 		A=ctx->A; B=ctx->B; C=ctx->C; D=ctx->D; E=ctx->E;
284 
285 	RIP1(A,B,C,D,E,WL00,SL00);
286 	RIP1(E,A,B,C,D,WL01,SL01);
287 	RIP1(D,E,A,B,C,WL02,SL02);
288 	RIP1(C,D,E,A,B,WL03,SL03);
289 	RIP1(B,C,D,E,A,WL04,SL04);
290 	RIP1(A,B,C,D,E,WL05,SL05);
291 	RIP1(E,A,B,C,D,WL06,SL06);
292 	RIP1(D,E,A,B,C,WL07,SL07);
293 	RIP1(C,D,E,A,B,WL08,SL08);
294 	RIP1(B,C,D,E,A,WL09,SL09);
295 	RIP1(A,B,C,D,E,WL10,SL10);
296 	RIP1(E,A,B,C,D,WL11,SL11);
297 	RIP1(D,E,A,B,C,WL12,SL12);
298 	RIP1(C,D,E,A,B,WL13,SL13);
299 	RIP1(B,C,D,E,A,WL14,SL14);
300 	RIP1(A,B,C,D,E,WL15,SL15);
301 
302 	RIP2(E,A,B,C,D,WL16,SL16,KL1);
303 	RIP2(D,E,A,B,C,WL17,SL17,KL1);
304 	RIP2(C,D,E,A,B,WL18,SL18,KL1);
305 	RIP2(B,C,D,E,A,WL19,SL19,KL1);
306 	RIP2(A,B,C,D,E,WL20,SL20,KL1);
307 	RIP2(E,A,B,C,D,WL21,SL21,KL1);
308 	RIP2(D,E,A,B,C,WL22,SL22,KL1);
309 	RIP2(C,D,E,A,B,WL23,SL23,KL1);
310 	RIP2(B,C,D,E,A,WL24,SL24,KL1);
311 	RIP2(A,B,C,D,E,WL25,SL25,KL1);
312 	RIP2(E,A,B,C,D,WL26,SL26,KL1);
313 	RIP2(D,E,A,B,C,WL27,SL27,KL1);
314 	RIP2(C,D,E,A,B,WL28,SL28,KL1);
315 	RIP2(B,C,D,E,A,WL29,SL29,KL1);
316 	RIP2(A,B,C,D,E,WL30,SL30,KL1);
317 	RIP2(E,A,B,C,D,WL31,SL31,KL1);
318 
319 	RIP3(D,E,A,B,C,WL32,SL32,KL2);
320 	RIP3(C,D,E,A,B,WL33,SL33,KL2);
321 	RIP3(B,C,D,E,A,WL34,SL34,KL2);
322 	RIP3(A,B,C,D,E,WL35,SL35,KL2);
323 	RIP3(E,A,B,C,D,WL36,SL36,KL2);
324 	RIP3(D,E,A,B,C,WL37,SL37,KL2);
325 	RIP3(C,D,E,A,B,WL38,SL38,KL2);
326 	RIP3(B,C,D,E,A,WL39,SL39,KL2);
327 	RIP3(A,B,C,D,E,WL40,SL40,KL2);
328 	RIP3(E,A,B,C,D,WL41,SL41,KL2);
329 	RIP3(D,E,A,B,C,WL42,SL42,KL2);
330 	RIP3(C,D,E,A,B,WL43,SL43,KL2);
331 	RIP3(B,C,D,E,A,WL44,SL44,KL2);
332 	RIP3(A,B,C,D,E,WL45,SL45,KL2);
333 	RIP3(E,A,B,C,D,WL46,SL46,KL2);
334 	RIP3(D,E,A,B,C,WL47,SL47,KL2);
335 
336 	RIP4(C,D,E,A,B,WL48,SL48,KL3);
337 	RIP4(B,C,D,E,A,WL49,SL49,KL3);
338 	RIP4(A,B,C,D,E,WL50,SL50,KL3);
339 	RIP4(E,A,B,C,D,WL51,SL51,KL3);
340 	RIP4(D,E,A,B,C,WL52,SL52,KL3);
341 	RIP4(C,D,E,A,B,WL53,SL53,KL3);
342 	RIP4(B,C,D,E,A,WL54,SL54,KL3);
343 	RIP4(A,B,C,D,E,WL55,SL55,KL3);
344 	RIP4(E,A,B,C,D,WL56,SL56,KL3);
345 	RIP4(D,E,A,B,C,WL57,SL57,KL3);
346 	RIP4(C,D,E,A,B,WL58,SL58,KL3);
347 	RIP4(B,C,D,E,A,WL59,SL59,KL3);
348 	RIP4(A,B,C,D,E,WL60,SL60,KL3);
349 	RIP4(E,A,B,C,D,WL61,SL61,KL3);
350 	RIP4(D,E,A,B,C,WL62,SL62,KL3);
351 	RIP4(C,D,E,A,B,WL63,SL63,KL3);
352 
353 	RIP5(B,C,D,E,A,WL64,SL64,KL4);
354 	RIP5(A,B,C,D,E,WL65,SL65,KL4);
355 	RIP5(E,A,B,C,D,WL66,SL66,KL4);
356 	RIP5(D,E,A,B,C,WL67,SL67,KL4);
357 	RIP5(C,D,E,A,B,WL68,SL68,KL4);
358 	RIP5(B,C,D,E,A,WL69,SL69,KL4);
359 	RIP5(A,B,C,D,E,WL70,SL70,KL4);
360 	RIP5(E,A,B,C,D,WL71,SL71,KL4);
361 	RIP5(D,E,A,B,C,WL72,SL72,KL4);
362 	RIP5(C,D,E,A,B,WL73,SL73,KL4);
363 	RIP5(B,C,D,E,A,WL74,SL74,KL4);
364 	RIP5(A,B,C,D,E,WL75,SL75,KL4);
365 	RIP5(E,A,B,C,D,WL76,SL76,KL4);
366 	RIP5(D,E,A,B,C,WL77,SL77,KL4);
367 	RIP5(C,D,E,A,B,WL78,SL78,KL4);
368 	RIP5(B,C,D,E,A,WL79,SL79,KL4);
369 
370 	a=A; b=B; c=C; d=D; e=E;
371 	/* Do other half */
372 	A=ctx->A; B=ctx->B; C=ctx->C; D=ctx->D; E=ctx->E;
373 
374 	RIP5(A,B,C,D,E,WR00,SR00,KR0);
375 	RIP5(E,A,B,C,D,WR01,SR01,KR0);
376 	RIP5(D,E,A,B,C,WR02,SR02,KR0);
377 	RIP5(C,D,E,A,B,WR03,SR03,KR0);
378 	RIP5(B,C,D,E,A,WR04,SR04,KR0);
379 	RIP5(A,B,C,D,E,WR05,SR05,KR0);
380 	RIP5(E,A,B,C,D,WR06,SR06,KR0);
381 	RIP5(D,E,A,B,C,WR07,SR07,KR0);
382 	RIP5(C,D,E,A,B,WR08,SR08,KR0);
383 	RIP5(B,C,D,E,A,WR09,SR09,KR0);
384 	RIP5(A,B,C,D,E,WR10,SR10,KR0);
385 	RIP5(E,A,B,C,D,WR11,SR11,KR0);
386 	RIP5(D,E,A,B,C,WR12,SR12,KR0);
387 	RIP5(C,D,E,A,B,WR13,SR13,KR0);
388 	RIP5(B,C,D,E,A,WR14,SR14,KR0);
389 	RIP5(A,B,C,D,E,WR15,SR15,KR0);
390 
391 	RIP4(E,A,B,C,D,WR16,SR16,KR1);
392 	RIP4(D,E,A,B,C,WR17,SR17,KR1);
393 	RIP4(C,D,E,A,B,WR18,SR18,KR1);
394 	RIP4(B,C,D,E,A,WR19,SR19,KR1);
395 	RIP4(A,B,C,D,E,WR20,SR20,KR1);
396 	RIP4(E,A,B,C,D,WR21,SR21,KR1);
397 	RIP4(D,E,A,B,C,WR22,SR22,KR1);
398 	RIP4(C,D,E,A,B,WR23,SR23,KR1);
399 	RIP4(B,C,D,E,A,WR24,SR24,KR1);
400 	RIP4(A,B,C,D,E,WR25,SR25,KR1);
401 	RIP4(E,A,B,C,D,WR26,SR26,KR1);
402 	RIP4(D,E,A,B,C,WR27,SR27,KR1);
403 	RIP4(C,D,E,A,B,WR28,SR28,KR1);
404 	RIP4(B,C,D,E,A,WR29,SR29,KR1);
405 	RIP4(A,B,C,D,E,WR30,SR30,KR1);
406 	RIP4(E,A,B,C,D,WR31,SR31,KR1);
407 
408 	RIP3(D,E,A,B,C,WR32,SR32,KR2);
409 	RIP3(C,D,E,A,B,WR33,SR33,KR2);
410 	RIP3(B,C,D,E,A,WR34,SR34,KR2);
411 	RIP3(A,B,C,D,E,WR35,SR35,KR2);
412 	RIP3(E,A,B,C,D,WR36,SR36,KR2);
413 	RIP3(D,E,A,B,C,WR37,SR37,KR2);
414 	RIP3(C,D,E,A,B,WR38,SR38,KR2);
415 	RIP3(B,C,D,E,A,WR39,SR39,KR2);
416 	RIP3(A,B,C,D,E,WR40,SR40,KR2);
417 	RIP3(E,A,B,C,D,WR41,SR41,KR2);
418 	RIP3(D,E,A,B,C,WR42,SR42,KR2);
419 	RIP3(C,D,E,A,B,WR43,SR43,KR2);
420 	RIP3(B,C,D,E,A,WR44,SR44,KR2);
421 	RIP3(A,B,C,D,E,WR45,SR45,KR2);
422 	RIP3(E,A,B,C,D,WR46,SR46,KR2);
423 	RIP3(D,E,A,B,C,WR47,SR47,KR2);
424 
425 	RIP2(C,D,E,A,B,WR48,SR48,KR3);
426 	RIP2(B,C,D,E,A,WR49,SR49,KR3);
427 	RIP2(A,B,C,D,E,WR50,SR50,KR3);
428 	RIP2(E,A,B,C,D,WR51,SR51,KR3);
429 	RIP2(D,E,A,B,C,WR52,SR52,KR3);
430 	RIP2(C,D,E,A,B,WR53,SR53,KR3);
431 	RIP2(B,C,D,E,A,WR54,SR54,KR3);
432 	RIP2(A,B,C,D,E,WR55,SR55,KR3);
433 	RIP2(E,A,B,C,D,WR56,SR56,KR3);
434 	RIP2(D,E,A,B,C,WR57,SR57,KR3);
435 	RIP2(C,D,E,A,B,WR58,SR58,KR3);
436 	RIP2(B,C,D,E,A,WR59,SR59,KR3);
437 	RIP2(A,B,C,D,E,WR60,SR60,KR3);
438 	RIP2(E,A,B,C,D,WR61,SR61,KR3);
439 	RIP2(D,E,A,B,C,WR62,SR62,KR3);
440 	RIP2(C,D,E,A,B,WR63,SR63,KR3);
441 
442 	RIP1(B,C,D,E,A,WR64,SR64);
443 	RIP1(A,B,C,D,E,WR65,SR65);
444 	RIP1(E,A,B,C,D,WR66,SR66);
445 	RIP1(D,E,A,B,C,WR67,SR67);
446 	RIP1(C,D,E,A,B,WR68,SR68);
447 	RIP1(B,C,D,E,A,WR69,SR69);
448 	RIP1(A,B,C,D,E,WR70,SR70);
449 	RIP1(E,A,B,C,D,WR71,SR71);
450 	RIP1(D,E,A,B,C,WR72,SR72);
451 	RIP1(C,D,E,A,B,WR73,SR73);
452 	RIP1(B,C,D,E,A,WR74,SR74);
453 	RIP1(A,B,C,D,E,WR75,SR75);
454 	RIP1(E,A,B,C,D,WR76,SR76);
455 	RIP1(D,E,A,B,C,WR77,SR77);
456 	RIP1(C,D,E,A,B,WR78,SR78);
457 	RIP1(B,C,D,E,A,WR79,SR79);
458 
459 	D     =ctx->B+c+D;
460 	ctx->B=ctx->C+d+E;
461 	ctx->C=ctx->D+e+A;
462 	ctx->D=ctx->E+a+B;
463 	ctx->E=ctx->A+b+C;
464 	ctx->A=D;
465 
466 	X+=16;
467 	num-=64;
468 	if (num <= 0) break;
469 		}
470 	}
471 #endif
472 
473 void RIPEMD160_Final(md, c)
474 unsigned char *md;
475 RIPEMD160_CTX *c;
476 	{
477 	register int i,j;
478 	register u_int32_t l;
479 	register u_int32_t *p;
480 	static unsigned char end[4]={0x80,0x00,0x00,0x00};
481 	unsigned char *cp=end;
482 
483 	/* c->num should definitly have room for at least one more byte. */
484 	p=c->data;
485 	j=c->num;
486 	i=j>>2;
487 
488 	/* purify often complains about the following line as an
489 	 * Uninitialized Memory Read.  While this can be true, the
490 	 * following p_c2l macro will reset l when that case is true.
491 	 * This is because j&0x03 contains the number of 'valid' bytes
492 	 * already in p[i].  If and only if j&0x03 == 0, the UMR will
493 	 * occur but this is also the only time p_c2l will do
494 	 * l= *(cp++) instead of l|= *(cp++)
495 	 * Many thanks to Alex Tang <altitude@cic.net> for pickup this
496 	 * 'potential bug' */
497 #ifdef PURIFY
498 	if ((j&0x03) == 0) p[i]=0;
499 #endif
500 	l=p[i];
501 	p_c2l(cp,l,j&0x03);
502 	p[i]=l;
503 	i++;
504 	/* i is the next 'undefined word' */
505 	if (c->num >= RIPEMD160_LAST_BLOCK)
506 		{
507 		for (; i<RIPEMD160_LBLOCK; i++)
508 			p[i]=0;
509 		ripemd160_block(c,p,64);
510 		i=0;
511 		}
512 	for (; i<(RIPEMD160_LBLOCK-2); i++)
513 		p[i]=0;
514 	p[RIPEMD160_LBLOCK-2]=c->Nl;
515 	p[RIPEMD160_LBLOCK-1]=c->Nh;
516 	ripemd160_block(c,p,64);
517 	cp=md;
518 	l=c->A; l2c(l,cp);
519 	l=c->B; l2c(l,cp);
520 	l=c->C; l2c(l,cp);
521 	l=c->D; l2c(l,cp);
522 	l=c->E; l2c(l,cp);
523 
524 	/* clear stuff, ripemd160_block may be leaving some stuff on the stack
525 	 * but I'm not worried :-) */
526 	c->num=0;
527 /*	memset((char *)&c,0,sizeof(c));*/
528 	}
529 
530 #ifdef undef
531 int printit(l)
532 unsigned long *l;
533 	{
534 	int i,ii;
535 
536 	for (i=0; i<2; i++)
537 		{
538 		for (ii=0; ii<8; ii++)
539 			{
540 			fprintf(stderr,"%08lx ",l[i*8+ii]);
541 			}
542 		fprintf(stderr,"\n");
543 		}
544 	}
545 #endif
546