RT3548: Remove unsupported platforms
[openssl.git] / crypto / ecdh / ecdhtest.c
1 /* crypto/ecdh/ecdhtest.c */
2 /* ====================================================================
3  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
4  *
5  * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
6  * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
7  * to the OpenSSL project.
8  *
9  * The ECC Code is licensed pursuant to the OpenSSL open source
10  * license provided below.
11  *
12  * The ECDH software is originally written by Douglas Stebila of
13  * Sun Microsystems Laboratories.
14  *
15  */
16 /* ====================================================================
17  * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.
18  *
19  * Redistribution and use in source and binary forms, with or without
20  * modification, are permitted provided that the following conditions
21  * are met:
22  *
23  * 1. Redistributions of source code must retain the above copyright
24  *    notice, this list of conditions and the following disclaimer. 
25  *
26  * 2. Redistributions in binary form must reproduce the above copyright
27  *    notice, this list of conditions and the following disclaimer in
28  *    the documentation and/or other materials provided with the
29  *    distribution.
30  *
31  * 3. All advertising materials mentioning features or use of this
32  *    software must display the following acknowledgment:
33  *    "This product includes software developed by the OpenSSL Project
34  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
35  *
36  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
37  *    endorse or promote products derived from this software without
38  *    prior written permission. For written permission, please contact
39  *    openssl-core@openssl.org.
40  *
41  * 5. Products derived from this software may not be called "OpenSSL"
42  *    nor may "OpenSSL" appear in their names without prior written
43  *    permission of the OpenSSL Project.
44  *
45  * 6. Redistributions of any form whatsoever must retain the following
46  *    acknowledgment:
47  *    "This product includes software developed by the OpenSSL Project
48  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
49  *
50  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
51  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
53  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
54  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
57  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
59  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
60  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
61  * OF THE POSSIBILITY OF SUCH DAMAGE.
62  * ====================================================================
63  *
64  * This product includes cryptographic software written by Eric Young
65  * (eay@cryptsoft.com).  This product includes software written by Tim
66  * Hudson (tjh@cryptsoft.com).
67  *
68  */
69
70 #include <stdio.h>
71 #include <stdlib.h>
72 #include <string.h>
73
74 #include "../e_os.h"
75
76 #include <openssl/opensslconf.h>        /* for OPENSSL_NO_ECDH */
77 #include <openssl/crypto.h>
78 #include <openssl/bio.h>
79 #include <openssl/bn.h>
80 #include <openssl/objects.h>
81 #include <openssl/rand.h>
82 #include <openssl/sha.h>
83 #include <openssl/err.h>
84
85 #ifdef OPENSSL_NO_ECDH
86 int main(int argc, char *argv[])
87 {
88     printf("No ECDH support\n");
89     return(0);
90 }
91 #else
92 #include <openssl/ec.h>
93 #include <openssl/ecdh.h>
94
95 #if 0
96 static void cb(int p, int n, void *arg);
97 #endif
98
99 static const char rnd_seed[] = "string to make the random number generator think it has entropy";
100
101
102 static const int KDF1_SHA1_len = 20;
103 static void *KDF1_SHA1(const void *in, size_t inlen, void *out, size_t *outlen)
104         {
105 #ifndef OPENSSL_NO_SHA
106         if (*outlen < SHA_DIGEST_LENGTH)
107                 return NULL;
108         else
109                 *outlen = SHA_DIGEST_LENGTH;
110         return SHA1(in, inlen, out);
111 #else
112         return NULL;
113 #endif
114         }
115
116
117 static int test_ecdh_curve(int nid, const char *text, BN_CTX *ctx, BIO *out)
118         {
119         EC_KEY *a=NULL;
120         EC_KEY *b=NULL;
121         BIGNUM *x_a=NULL, *y_a=NULL,
122                *x_b=NULL, *y_b=NULL;
123         char buf[12];
124         unsigned char *abuf=NULL,*bbuf=NULL;
125         int i,alen,blen,aout,bout,ret=0;
126         const EC_GROUP *group;
127
128         a = EC_KEY_new_by_curve_name(nid);
129         b = EC_KEY_new_by_curve_name(nid);
130         if (a == NULL || b == NULL)
131                 goto err;
132
133         group = EC_KEY_get0_group(a);
134
135         if ((x_a=BN_new()) == NULL) goto err;
136         if ((y_a=BN_new()) == NULL) goto err;
137         if ((x_b=BN_new()) == NULL) goto err;
138         if ((y_b=BN_new()) == NULL) goto err;
139
140         BIO_puts(out,"Testing key generation with ");
141         BIO_puts(out,text);
142 #ifdef NOISY
143         BIO_puts(out,"\n");
144 #else
145         (void)BIO_flush(out);
146 #endif
147
148         if (!EC_KEY_generate_key(a)) goto err;
149         
150         if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) 
151                 {
152                 if (!EC_POINT_get_affine_coordinates_GFp(group,
153                         EC_KEY_get0_public_key(a), x_a, y_a, ctx)) goto err;
154                 }
155 #ifndef OPENSSL_NO_EC2M
156         else
157                 {
158                 if (!EC_POINT_get_affine_coordinates_GF2m(group,
159                         EC_KEY_get0_public_key(a), x_a, y_a, ctx)) goto err;
160                 }
161 #endif
162 #ifdef NOISY
163         BIO_puts(out,"  pri 1=");
164         BN_print(out,a->priv_key);
165         BIO_puts(out,"\n  pub 1=");
166         BN_print(out,x_a);
167         BIO_puts(out,",");
168         BN_print(out,y_a);
169         BIO_puts(out,"\n");
170 #else
171         BIO_printf(out," .");
172         (void)BIO_flush(out);
173 #endif
174
175         if (!EC_KEY_generate_key(b)) goto err;
176
177         if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) 
178                 {
179                 if (!EC_POINT_get_affine_coordinates_GFp(group, 
180                         EC_KEY_get0_public_key(b), x_b, y_b, ctx)) goto err;
181                 }
182 #ifndef OPENSSL_NO_EC2M
183         else
184                 {
185                 if (!EC_POINT_get_affine_coordinates_GF2m(group, 
186                         EC_KEY_get0_public_key(b), x_b, y_b, ctx)) goto err;
187                 }
188 #endif
189
190 #ifdef NOISY
191         BIO_puts(out,"  pri 2=");
192         BN_print(out,b->priv_key);
193         BIO_puts(out,"\n  pub 2=");
194         BN_print(out,x_b);
195         BIO_puts(out,",");
196         BN_print(out,y_b);
197         BIO_puts(out,"\n");
198 #else
199         BIO_printf(out,".");
200         (void)BIO_flush(out);
201 #endif
202
203         alen=KDF1_SHA1_len;
204         abuf=(unsigned char *)OPENSSL_malloc(alen);
205         aout=ECDH_compute_key(abuf,alen,EC_KEY_get0_public_key(b),a,KDF1_SHA1);
206
207 #ifdef NOISY
208         BIO_puts(out,"  key1 =");
209         for (i=0; i<aout; i++)
210                 {
211                 sprintf(buf,"%02X",abuf[i]);
212                 BIO_puts(out,buf);
213                 }
214         BIO_puts(out,"\n");
215 #else
216         BIO_printf(out,".");
217         (void)BIO_flush(out);
218 #endif
219
220         blen=KDF1_SHA1_len;
221         bbuf=(unsigned char *)OPENSSL_malloc(blen);
222         bout=ECDH_compute_key(bbuf,blen,EC_KEY_get0_public_key(a),b,KDF1_SHA1);
223
224 #ifdef NOISY
225         BIO_puts(out,"  key2 =");
226         for (i=0; i<bout; i++)
227                 {
228                 sprintf(buf,"%02X",bbuf[i]);
229                 BIO_puts(out,buf);
230                 }
231         BIO_puts(out,"\n");
232 #else
233         BIO_printf(out,".");
234         (void)BIO_flush(out);
235 #endif
236
237         if ((aout < 4) || (bout != aout) || (memcmp(abuf,bbuf,aout) != 0))
238                 {
239 #ifndef NOISY
240                 BIO_printf(out, " failed\n\n");
241                 BIO_printf(out, "key a:\n");
242                 BIO_printf(out, "private key: ");
243                 BN_print(out, EC_KEY_get0_private_key(a));
244                 BIO_printf(out, "\n");
245                 BIO_printf(out, "public key (x,y): ");
246                 BN_print(out, x_a);
247                 BIO_printf(out, ",");
248                 BN_print(out, y_a);
249                 BIO_printf(out, "\nkey b:\n");
250                 BIO_printf(out, "private key: ");
251                 BN_print(out, EC_KEY_get0_private_key(b));
252                 BIO_printf(out, "\n");
253                 BIO_printf(out, "public key (x,y): ");
254                 BN_print(out, x_b);
255                 BIO_printf(out, ",");
256                 BN_print(out, y_b);
257                 BIO_printf(out, "\n");
258                 BIO_printf(out, "generated key a: ");
259                 for (i=0; i<bout; i++)
260                         {
261                         sprintf(buf, "%02X", bbuf[i]);
262                         BIO_puts(out, buf);
263                         }
264                 BIO_printf(out, "\n");
265                 BIO_printf(out, "generated key b: ");
266                 for (i=0; i<aout; i++)
267                         {
268                         sprintf(buf, "%02X", abuf[i]);
269                         BIO_puts(out,buf);
270                         }
271                 BIO_printf(out, "\n");
272 #endif
273                 fprintf(stderr,"Error in ECDH routines\n");
274                 ret=0;
275                 }
276         else
277                 {
278 #ifndef NOISY
279                 BIO_printf(out, " ok\n");
280 #endif
281                 ret=1;
282                 }
283 err:
284         ERR_print_errors_fp(stderr);
285
286         if (abuf != NULL) OPENSSL_free(abuf);
287         if (bbuf != NULL) OPENSSL_free(bbuf);
288         if (x_a) BN_free(x_a);
289         if (y_a) BN_free(y_a);
290         if (x_b) BN_free(x_b);
291         if (y_b) BN_free(y_b);
292         if (b) EC_KEY_free(b);
293         if (a) EC_KEY_free(a);
294         return(ret);
295         }
296
297 /* Keys and shared secrets from RFC 7027 */
298
299 static const unsigned char bp256_da[] = {
300         0x81,0xDB,0x1E,0xE1,0x00,0x15,0x0F,0xF2,0xEA,0x33,0x8D,0x70,
301         0x82,0x71,0xBE,0x38,0x30,0x0C,0xB5,0x42,0x41,0xD7,0x99,0x50,
302         0xF7,0x7B,0x06,0x30,0x39,0x80,0x4F,0x1D
303 };
304
305 static const unsigned char bp256_db[] = {
306         0x55,0xE4,0x0B,0xC4,0x1E,0x37,0xE3,0xE2,0xAD,0x25,0xC3,0xC6,
307         0x65,0x45,0x11,0xFF,0xA8,0x47,0x4A,0x91,0xA0,0x03,0x20,0x87,
308         0x59,0x38,0x52,0xD3,0xE7,0xD7,0x6B,0xD3
309 };
310
311 static const unsigned char bp256_Z[] = {
312         0x89,0xAF,0xC3,0x9D,0x41,0xD3,0xB3,0x27,0x81,0x4B,0x80,0x94,
313         0x0B,0x04,0x25,0x90,0xF9,0x65,0x56,0xEC,0x91,0xE6,0xAE,0x79,
314         0x39,0xBC,0xE3,0x1F,0x3A,0x18,0xBF,0x2B
315 };
316
317 static const unsigned char bp384_da[] = {
318         0x1E,0x20,0xF5,0xE0,0x48,0xA5,0x88,0x6F,0x1F,0x15,0x7C,0x74,
319         0xE9,0x1B,0xDE,0x2B,0x98,0xC8,0xB5,0x2D,0x58,0xE5,0x00,0x3D,
320         0x57,0x05,0x3F,0xC4,0xB0,0xBD,0x65,0xD6,0xF1,0x5E,0xB5,0xD1,
321         0xEE,0x16,0x10,0xDF,0x87,0x07,0x95,0x14,0x36,0x27,0xD0,0x42
322 };
323
324 static const unsigned char bp384_db[] = {
325         0x03,0x26,0x40,0xBC,0x60,0x03,0xC5,0x92,0x60,0xF7,0x25,0x0C,
326         0x3D,0xB5,0x8C,0xE6,0x47,0xF9,0x8E,0x12,0x60,0xAC,0xCE,0x4A,
327         0xCD,0xA3,0xDD,0x86,0x9F,0x74,0xE0,0x1F,0x8B,0xA5,0xE0,0x32,
328         0x43,0x09,0xDB,0x6A,0x98,0x31,0x49,0x7A,0xBA,0xC9,0x66,0x70
329 };
330
331 static const unsigned char bp384_Z[] = {
332         0x0B,0xD9,0xD3,0xA7,0xEA,0x0B,0x3D,0x51,0x9D,0x09,0xD8,0xE4,
333         0x8D,0x07,0x85,0xFB,0x74,0x4A,0x6B,0x35,0x5E,0x63,0x04,0xBC,
334         0x51,0xC2,0x29,0xFB,0xBC,0xE2,0x39,0xBB,0xAD,0xF6,0x40,0x37,
335         0x15,0xC3,0x5D,0x4F,0xB2,0xA5,0x44,0x4F,0x57,0x5D,0x4F,0x42
336 };
337
338 static const unsigned char bp512_da[] = {
339         0x16,0x30,0x2F,0xF0,0xDB,0xBB,0x5A,0x8D,0x73,0x3D,0xAB,0x71,
340         0x41,0xC1,0xB4,0x5A,0xCB,0xC8,0x71,0x59,0x39,0x67,0x7F,0x6A,
341         0x56,0x85,0x0A,0x38,0xBD,0x87,0xBD,0x59,0xB0,0x9E,0x80,0x27,
342         0x96,0x09,0xFF,0x33,0x3E,0xB9,0xD4,0xC0,0x61,0x23,0x1F,0xB2,
343         0x6F,0x92,0xEE,0xB0,0x49,0x82,0xA5,0xF1,0xD1,0x76,0x4C,0xAD,
344         0x57,0x66,0x54,0x22
345 };
346
347 static const unsigned char bp512_db[] = {
348         0x23,0x0E,0x18,0xE1,0xBC,0xC8,0x8A,0x36,0x2F,0xA5,0x4E,0x4E,
349         0xA3,0x90,0x20,0x09,0x29,0x2F,0x7F,0x80,0x33,0x62,0x4F,0xD4,
350         0x71,0xB5,0xD8,0xAC,0xE4,0x9D,0x12,0xCF,0xAB,0xBC,0x19,0x96,
351         0x3D,0xAB,0x8E,0x2F,0x1E,0xBA,0x00,0xBF,0xFB,0x29,0xE4,0xD7,
352         0x2D,0x13,0xF2,0x22,0x45,0x62,0xF4,0x05,0xCB,0x80,0x50,0x36,
353         0x66,0xB2,0x54,0x29
354 };
355
356
357 static const unsigned char bp512_Z[] = {
358         0xA7,0x92,0x70,0x98,0x65,0x5F,0x1F,0x99,0x76,0xFA,0x50,0xA9,
359         0xD5,0x66,0x86,0x5D,0xC5,0x30,0x33,0x18,0x46,0x38,0x1C,0x87,
360         0x25,0x6B,0xAF,0x32,0x26,0x24,0x4B,0x76,0xD3,0x64,0x03,0xC0,
361         0x24,0xD7,0xBB,0xF0,0xAA,0x08,0x03,0xEA,0xFF,0x40,0x5D,0x3D,
362         0x24,0xF1,0x1A,0x9B,0x5C,0x0B,0xEF,0x67,0x9F,0xE1,0x45,0x4B,
363         0x21,0xC4,0xCD,0x1F
364 };
365
366 /* Given private value and NID, create EC_KEY structure */
367
368 static EC_KEY *mk_eckey(int nid, const unsigned char *p, size_t plen)
369         {
370         int ok = 0;
371         EC_KEY *k = NULL;
372         BIGNUM *priv = NULL;
373         EC_POINT *pub = NULL;
374         const EC_GROUP *grp;
375         k = EC_KEY_new_by_curve_name(nid);
376         if (!k)
377                 goto err;
378         priv = BN_bin2bn(p, plen, NULL);
379         if (!priv)
380                 goto err;
381         if (!EC_KEY_set_private_key(k, priv))
382                 goto err;
383         grp = EC_KEY_get0_group(k);
384         pub = EC_POINT_new(grp);
385         if (!pub)
386                 goto err;
387         if (!EC_POINT_mul(grp, pub, priv, NULL, NULL, NULL))
388                 goto err;
389         if (!EC_KEY_set_public_key(k, pub))
390                 goto err;
391         ok = 1;
392         err:
393         if (priv)
394                 BN_clear_free(priv);
395         if (pub)
396                 EC_POINT_free(pub);
397         if (ok)
398                 return k;
399         else if (k)
400                 EC_KEY_free(k);
401         return NULL;
402         }
403
404 /* Known answer test: compute shared secret and check it matches
405  * expected value.
406  */
407
408 static int ecdh_kat(BIO *out, const char *cname, int nid,
409                 const unsigned char *k1, size_t k1_len,
410                 const unsigned char *k2, size_t k2_len,
411                 const unsigned char *Z, size_t Zlen)
412         {
413         int rv = 0;
414         EC_KEY *key1 = NULL, *key2 = NULL;
415         unsigned char *Ztmp = NULL;
416         size_t Ztmplen;
417         BIO_puts(out, "Testing ECDH shared secret with ");
418         BIO_puts(out, cname);
419         key1 = mk_eckey(nid, k1, k1_len);
420         key2 = mk_eckey(nid, k2, k2_len);
421         if (!key1 || !key2)
422                 goto err;
423         Ztmplen = (EC_GROUP_get_degree(EC_KEY_get0_group(key1)) + 7)/8;
424         if (Ztmplen != Zlen)
425                 goto err;
426         Ztmp = OPENSSL_malloc(Ztmplen);
427         if (!ECDH_compute_key(Ztmp, Ztmplen,
428                                 EC_KEY_get0_public_key(key2), key1, 0))
429                 goto err;
430         if (memcmp(Ztmp, Z, Zlen))
431                 goto err;
432         memset(Ztmp, 0, Zlen);
433         if (!ECDH_compute_key(Ztmp, Ztmplen,
434                                 EC_KEY_get0_public_key(key1), key2, 0))
435                 goto err;
436         if (memcmp(Ztmp, Z, Zlen))
437                 goto err;
438         rv = 1;
439         err:
440         if (key1)
441                 EC_KEY_free(key1);
442         if (key2)
443                 EC_KEY_free(key2);
444         if (Ztmp)
445                 OPENSSL_free(Ztmp);
446         if (rv)
447                 BIO_puts(out, " ok\n");
448         else
449                 {
450                 fprintf(stderr, "Error in ECDH routines\n");
451                 ERR_print_errors_fp(stderr);
452                 }
453         return rv;
454         }
455
456 #define test_ecdh_kat(bio, curve, bits) \
457         ecdh_kat(bio, curve, NID_brainpoolP##bits##r1, \
458                 bp##bits##_da, sizeof(bp##bits##_da), \
459                 bp##bits##_db, sizeof(bp##bits##_db), \
460                 bp##bits##_Z, sizeof(bp##bits##_Z))
461
462 int main(int argc, char *argv[])
463         {
464         BN_CTX *ctx=NULL;
465         int ret=1;
466         BIO *out;
467
468         CRYPTO_malloc_debug_init();
469         CRYPTO_dbg_set_options(V_CRYPTO_MDEBUG_ALL);
470         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
471
472 #ifdef OPENSSL_SYS_WIN32
473         CRYPTO_malloc_init();
474 #endif
475
476         RAND_seed(rnd_seed, sizeof rnd_seed);
477
478         out=BIO_new(BIO_s_file());
479         if (out == NULL) EXIT(1);
480         BIO_set_fp(out,stdout,BIO_NOCLOSE);
481
482         if ((ctx=BN_CTX_new()) == NULL) goto err;
483
484         /* NIST PRIME CURVES TESTS */
485         if (!test_ecdh_curve(NID_X9_62_prime192v1, "NIST Prime-Curve P-192", ctx, out)) goto err;
486         if (!test_ecdh_curve(NID_secp224r1, "NIST Prime-Curve P-224", ctx, out)) goto err;
487         if (!test_ecdh_curve(NID_X9_62_prime256v1, "NIST Prime-Curve P-256", ctx, out)) goto err;
488         if (!test_ecdh_curve(NID_secp384r1, "NIST Prime-Curve P-384", ctx, out)) goto err;
489         if (!test_ecdh_curve(NID_secp521r1, "NIST Prime-Curve P-521", ctx, out)) goto err;
490 #ifndef OPENSSL_NO_EC2M
491         /* NIST BINARY CURVES TESTS */
492         if (!test_ecdh_curve(NID_sect163k1, "NIST Binary-Curve K-163", ctx, out)) goto err;
493         if (!test_ecdh_curve(NID_sect163r2, "NIST Binary-Curve B-163", ctx, out)) goto err;
494         if (!test_ecdh_curve(NID_sect233k1, "NIST Binary-Curve K-233", ctx, out)) goto err;
495         if (!test_ecdh_curve(NID_sect233r1, "NIST Binary-Curve B-233", ctx, out)) goto err;
496         if (!test_ecdh_curve(NID_sect283k1, "NIST Binary-Curve K-283", ctx, out)) goto err;
497         if (!test_ecdh_curve(NID_sect283r1, "NIST Binary-Curve B-283", ctx, out)) goto err;
498         if (!test_ecdh_curve(NID_sect409k1, "NIST Binary-Curve K-409", ctx, out)) goto err;
499         if (!test_ecdh_curve(NID_sect409r1, "NIST Binary-Curve B-409", ctx, out)) goto err;
500         if (!test_ecdh_curve(NID_sect571k1, "NIST Binary-Curve K-571", ctx, out)) goto err;
501         if (!test_ecdh_curve(NID_sect571r1, "NIST Binary-Curve B-571", ctx, out)) goto err;
502 #endif
503         if (!test_ecdh_kat(out, "Brainpool Prime-Curve brainpoolP256r1", 256))
504                 goto err;
505         if (!test_ecdh_kat(out, "Brainpool Prime-Curve brainpoolP384r1", 384))
506                 goto err;
507         if (!test_ecdh_kat(out, "Brainpool Prime-Curve brainpoolP512r1", 512))
508                 goto err;
509
510         ret = 0;
511
512 err:
513         ERR_print_errors_fp(stderr);
514         if (ctx) BN_CTX_free(ctx);
515         BIO_free(out);
516         CRYPTO_cleanup_all_ex_data();
517         ERR_remove_thread_state(NULL);
518         CRYPTO_mem_leaks_fp(stderr);
519         EXIT(ret);
520         return(ret);
521         }
522
523 #if 0
524 static void cb(int p, int n, void *arg)
525         {
526         char c='*';
527
528         if (p == 0) c='.';
529         if (p == 1) c='+';
530         if (p == 2) c='*';
531         if (p == 3) c='\n';
532         BIO_write((BIO *)arg,&c,1);
533         (void)BIO_flush((BIO *)arg);
534         }
535 #endif
536 #endif