1 /* crypto/bio/b_print.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
59 /* disable assert() unless BIO_DEBUG has been defined */
60 #ifndef BIO_DEBUG
61 # ifndef NDEBUG
62 # define NDEBUG
63 # endif
64 #endif
65
66 /*
67 * Stolen from tjh's ssl/ssl_trc.c stuff.
68 */
69
70 #include <stdio.h>
71 #include <string.h>
72 #include <ctype.h>
73 #include <assert.h>
74 #include <limits.h>
75 #include "cryptlib.h"
76 #ifndef NO_SYS_TYPES_H
77 #include <sys/types.h>
78 #endif
79 #include <openssl/bn.h> /* To get BN_LLONG properly defined */
80 #include <openssl/bio.h>
81
82 #if defined(BN_LLONG) || defined(SIXTY_FOUR_BIT)
83 # ifndef HAVE_LONG_LONG
84 # define HAVE_LONG_LONG 1
85 # endif
86 #endif
87
88 __RCSID("$MirOS: src/lib/libssl/src/crypto/bio/b_print.c,v 1.2 2014/06/05 12:47:57 tg Exp $");
89
90 /***************************************************************************/
91
92 /*
93 * Copyright Patrick Powell 1995
94 * This code is based on code written by Patrick Powell <papowell@astart.com>
95 * It may be used for any purpose as long as this notice remains intact
96 * on all source code distributions.
97 */
98
99 /*
100 * This code contains numerious changes and enhancements which were
101 * made by lots of contributors over the last years to Patrick Powell's
102 * original code:
103 *
104 * o Patrick Powell <papowell@astart.com> (1995)
105 * o Brandon Long <blong@fiction.net> (1996, for Mutt)
106 * o Thomas Roessler <roessler@guug.de> (1998, for Mutt)
107 * o Michael Elkins <me@cs.hmc.edu> (1998, for Mutt)
108 * o Andrew Tridgell <tridge@samba.org> (1998, for Samba)
109 * o Luke Mewburn <lukem@netbsd.org> (1999, for LukemFTP)
110 * o Ralf S. Engelschall <rse@engelschall.com> (1999, for Pth)
111 * o ... (for OpenSSL)
112 */
113
114 #ifdef HAVE_LONG_DOUBLE
115 #define LDOUBLE long double
116 #else
117 #define LDOUBLE double
118 #endif
119
120 #if HAVE_LONG_LONG
121 # if defined(OPENSSL_SYS_WIN32) && !defined(__GNUC__)
122 # define LLONG __int64
123 # else
124 # define LLONG long long
125 # endif
126 #else
127 #define LLONG long
128 #endif
129
130 static void fmtstr (char **, char **, size_t *, size_t *,
131 const char *, int, int, int);
132 static void fmtint (char **, char **, size_t *, size_t *,
133 LLONG, int, int, int, int);
134 static void fmtfp (char **, char **, size_t *, size_t *,
135 LDOUBLE, int, int, int);
136 static void doapr_outch (char **, char **, size_t *, size_t *, int);
137 static void _dopr(char **sbuffer, char **buffer,
138 size_t *maxlen, size_t *retlen, int *truncated,
139 const char *format, va_list args);
140
141 /* format read states */
142 #define DP_S_DEFAULT 0
143 #define DP_S_FLAGS 1
144 #define DP_S_MIN 2
145 #define DP_S_DOT 3
146 #define DP_S_MAX 4
147 #define DP_S_MOD 5
148 #define DP_S_CONV 6
149 #define DP_S_DONE 7
150
151 /* format flags - Bits */
152 #define DP_F_MINUS (1 << 0)
153 #define DP_F_PLUS (1 << 1)
154 #define DP_F_SPACE (1 << 2)
155 #define DP_F_NUM (1 << 3)
156 #define DP_F_ZERO (1 << 4)
157 #define DP_F_UP (1 << 5)
158 #define DP_F_UNSIGNED (1 << 6)
159
160 /* conversion flags */
161 #define DP_C_SHORT 1
162 #define DP_C_LONG 2
163 #define DP_C_LDOUBLE 3
164 #define DP_C_LLONG 4
165
166 /* some handy macros */
167 #define char_to_int(p) (p - '0')
168 #define OSSL_MAX(p,q) ((p >= q) ? p : q)
169
170 static void
_dopr(char ** sbuffer,char ** buffer,size_t * maxlen,size_t * retlen,int * truncated,const char * format,va_list args)171 _dopr(
172 char **sbuffer,
173 char **buffer,
174 size_t *maxlen,
175 size_t *retlen,
176 int *truncated,
177 const char *format,
178 va_list args)
179 {
180 char ch;
181 LLONG value;
182 LDOUBLE fvalue;
183 char *strvalue;
184 int min;
185 int max;
186 int state;
187 int flags;
188 int cflags;
189 size_t currlen;
190
191 state = DP_S_DEFAULT;
192 flags = currlen = cflags = min = 0;
193 max = -1;
194 ch = *format++;
195
196 while (state != DP_S_DONE) {
197 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
198 state = DP_S_DONE;
199
200 switch (state) {
201 case DP_S_DEFAULT:
202 if (ch == '%')
203 state = DP_S_FLAGS;
204 else
205 doapr_outch(sbuffer,buffer, &currlen, maxlen, ch);
206 ch = *format++;
207 break;
208 case DP_S_FLAGS:
209 switch (ch) {
210 case '-':
211 flags |= DP_F_MINUS;
212 ch = *format++;
213 break;
214 case '+':
215 flags |= DP_F_PLUS;
216 ch = *format++;
217 break;
218 case ' ':
219 flags |= DP_F_SPACE;
220 ch = *format++;
221 break;
222 case '#':
223 flags |= DP_F_NUM;
224 ch = *format++;
225 break;
226 case '0':
227 flags |= DP_F_ZERO;
228 ch = *format++;
229 break;
230 default:
231 state = DP_S_MIN;
232 break;
233 }
234 break;
235 case DP_S_MIN:
236 if (isdigit((unsigned char)ch)) {
237 min = 10 * min + char_to_int(ch);
238 ch = *format++;
239 } else if (ch == '*') {
240 min = va_arg(args, int);
241 ch = *format++;
242 state = DP_S_DOT;
243 } else
244 state = DP_S_DOT;
245 break;
246 case DP_S_DOT:
247 if (ch == '.') {
248 state = DP_S_MAX;
249 ch = *format++;
250 } else
251 state = DP_S_MOD;
252 break;
253 case DP_S_MAX:
254 if (isdigit((unsigned char)ch)) {
255 if (max < 0)
256 max = 0;
257 max = 10 * max + char_to_int(ch);
258 ch = *format++;
259 } else if (ch == '*') {
260 max = va_arg(args, int);
261 ch = *format++;
262 state = DP_S_MOD;
263 } else
264 state = DP_S_MOD;
265 break;
266 case DP_S_MOD:
267 switch (ch) {
268 case 'h':
269 cflags = DP_C_SHORT;
270 ch = *format++;
271 break;
272 case 'l':
273 if (*format == 'l') {
274 cflags = DP_C_LLONG;
275 format++;
276 } else
277 cflags = DP_C_LONG;
278 ch = *format++;
279 break;
280 case 'q':
281 cflags = DP_C_LLONG;
282 ch = *format++;
283 break;
284 case 'L':
285 cflags = DP_C_LDOUBLE;
286 ch = *format++;
287 break;
288 default:
289 break;
290 }
291 state = DP_S_CONV;
292 break;
293 case DP_S_CONV:
294 switch (ch) {
295 case 'd':
296 case 'i':
297 switch (cflags) {
298 case DP_C_SHORT:
299 value = (short int)va_arg(args, int);
300 break;
301 case DP_C_LONG:
302 value = va_arg(args, long int);
303 break;
304 case DP_C_LLONG:
305 value = va_arg(args, LLONG);
306 break;
307 default:
308 value = va_arg(args, int);
309 break;
310 }
311 fmtint(sbuffer, buffer, &currlen, maxlen,
312 value, 10, min, max, flags);
313 break;
314 case 'X':
315 flags |= DP_F_UP;
316 /* FALLTHROUGH */
317 case 'x':
318 case 'o':
319 case 'u':
320 flags |= DP_F_UNSIGNED;
321 switch (cflags) {
322 case DP_C_SHORT:
323 value = (unsigned short int)va_arg(args, unsigned int);
324 break;
325 case DP_C_LONG:
326 value = (LLONG) va_arg(args,
327 unsigned long int);
328 break;
329 case DP_C_LLONG:
330 value = va_arg(args, unsigned LLONG);
331 break;
332 default:
333 value = (LLONG) va_arg(args,
334 unsigned int);
335 break;
336 }
337 fmtint(sbuffer, buffer, &currlen, maxlen, value,
338 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
339 min, max, flags);
340 break;
341 case 'f':
342 if (cflags == DP_C_LDOUBLE)
343 fvalue = va_arg(args, LDOUBLE);
344 else
345 fvalue = va_arg(args, double);
346 fmtfp(sbuffer, buffer, &currlen, maxlen,
347 fvalue, min, max, flags);
348 break;
349 case 'E':
350 flags |= DP_F_UP;
351 case 'e':
352 if (cflags == DP_C_LDOUBLE)
353 fvalue = va_arg(args, LDOUBLE);
354 else
355 fvalue = va_arg(args, double);
356 break;
357 case 'G':
358 flags |= DP_F_UP;
359 case 'g':
360 if (cflags == DP_C_LDOUBLE)
361 fvalue = va_arg(args, LDOUBLE);
362 else
363 fvalue = va_arg(args, double);
364 break;
365 case 'c':
366 doapr_outch(sbuffer, buffer, &currlen, maxlen,
367 va_arg(args, int));
368 break;
369 case 's':
370 strvalue = va_arg(args, char *);
371 if (max < 0) {
372 if (buffer)
373 max = INT_MAX;
374 else
375 max = *maxlen;
376 }
377 fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
378 flags, min, max);
379 break;
380 case 'p':
381 value = (long)va_arg(args, void *);
382 fmtint(sbuffer, buffer, &currlen, maxlen,
383 value, 16, min, max, flags|DP_F_NUM);
384 break;
385 case 'n': /* XXX */
386 if (cflags == DP_C_SHORT) {
387 short int *num;
388 num = va_arg(args, short int *);
389 *num = currlen;
390 } else if (cflags == DP_C_LONG) { /* XXX */
391 long int *num;
392 num = va_arg(args, long int *);
393 *num = (long int) currlen;
394 } else if (cflags == DP_C_LLONG) { /* XXX */
395 LLONG *num;
396 num = va_arg(args, LLONG *);
397 *num = (LLONG) currlen;
398 } else {
399 int *num;
400 num = va_arg(args, int *);
401 *num = currlen;
402 }
403 break;
404 case '%':
405 doapr_outch(sbuffer, buffer, &currlen, maxlen, ch);
406 break;
407 case 'w':
408 /* not supported yet, treat as next char */
409 ch = *format++;
410 break;
411 default:
412 /* unknown, skip */
413 break;
414 }
415 ch = *format++;
416 state = DP_S_DEFAULT;
417 flags = cflags = min = 0;
418 max = -1;
419 break;
420 case DP_S_DONE:
421 break;
422 default:
423 break;
424 }
425 }
426 *truncated = (currlen > *maxlen - 1);
427 if (*truncated)
428 currlen = *maxlen - 1;
429 doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0');
430 *retlen = currlen - 1;
431 return;
432 }
433
434 static void
fmtstr(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,const char * value,int flags,int min,int max)435 fmtstr(
436 char **sbuffer,
437 char **buffer,
438 size_t *currlen,
439 size_t *maxlen,
440 const char *value,
441 int flags,
442 int min,
443 int max)
444 {
445 int padlen, strln;
446 int cnt = 0;
447
448 if (value == 0)
449 value = "<NULL>";
450 for (strln = 0; value[strln]; ++strln)
451 ;
452 padlen = min - strln;
453 if (padlen < 0)
454 padlen = 0;
455 if (flags & DP_F_MINUS)
456 padlen = -padlen;
457
458 while ((padlen > 0) && (cnt < max)) {
459 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
460 --padlen;
461 ++cnt;
462 }
463 while (*value && (cnt < max)) {
464 doapr_outch(sbuffer, buffer, currlen, maxlen, *value++);
465 ++cnt;
466 }
467 while ((padlen < 0) && (cnt < max)) {
468 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
469 ++padlen;
470 ++cnt;
471 }
472 }
473
474 static void
fmtint(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,LLONG value,int base,int min,int max,int flags)475 fmtint(
476 char **sbuffer,
477 char **buffer,
478 size_t *currlen,
479 size_t *maxlen,
480 LLONG value,
481 int base,
482 int min,
483 int max,
484 int flags)
485 {
486 int signvalue = 0;
487 char *prefix = "";
488 unsigned LLONG uvalue;
489 char convert[DECIMAL_SIZE(value)+3];
490 int place = 0;
491 int spadlen = 0;
492 int zpadlen = 0;
493 int caps = 0;
494
495 if (max < 0)
496 max = 0;
497 uvalue = value;
498 if (!(flags & DP_F_UNSIGNED)) {
499 if (value < 0) {
500 signvalue = '-';
501 uvalue = -value;
502 } else if (flags & DP_F_PLUS)
503 signvalue = '+';
504 else if (flags & DP_F_SPACE)
505 signvalue = ' ';
506 }
507 if (flags & DP_F_NUM) {
508 if (base == 8) prefix = "0";
509 if (base == 16) prefix = "0x";
510 }
511 if (flags & DP_F_UP)
512 caps = 1;
513 do {
514 convert[place++] =
515 (caps ? "0123456789ABCDEF" : "0123456789abcdef")
516 [uvalue % (unsigned) base];
517 uvalue = (uvalue / (unsigned) base);
518 } while (uvalue && (place < sizeof convert));
519 if (place == sizeof convert)
520 place--;
521 convert[place] = 0;
522
523 zpadlen = max - place;
524 spadlen = min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
525 if (zpadlen < 0)
526 zpadlen = 0;
527 if (spadlen < 0)
528 spadlen = 0;
529 if (flags & DP_F_ZERO) {
530 zpadlen = OSSL_MAX(zpadlen, spadlen);
531 spadlen = 0;
532 }
533 if (flags & DP_F_MINUS)
534 spadlen = -spadlen;
535
536 /* spaces */
537 while (spadlen > 0) {
538 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
539 --spadlen;
540 }
541
542 /* sign */
543 if (signvalue)
544 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
545
546 /* prefix */
547 while (*prefix) {
548 doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix);
549 prefix++;
550 }
551
552 /* zeros */
553 if (zpadlen > 0) {
554 while (zpadlen > 0) {
555 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
556 --zpadlen;
557 }
558 }
559 /* digits */
560 while (place > 0)
561 doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]);
562
563 /* left justified spaces */
564 while (spadlen < 0) {
565 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
566 ++spadlen;
567 }
568 return;
569 }
570
571 static LDOUBLE
abs_val(LDOUBLE value)572 abs_val(LDOUBLE value)
573 {
574 LDOUBLE result = value;
575 if (value < 0)
576 result = -value;
577 return result;
578 }
579
580 static LDOUBLE
pow_10(int in_exp)581 pow_10(int in_exp)
582 {
583 LDOUBLE result = 1;
584 while (in_exp) {
585 result *= 10;
586 in_exp--;
587 }
588 return result;
589 }
590
591 static long
roundv(LDOUBLE value)592 roundv(LDOUBLE value)
593 {
594 long intpart;
595 intpart = (long) value;
596 value = value - intpart;
597 if (value >= 0.5)
598 intpart++;
599 return intpart;
600 }
601
602 static void
fmtfp(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,LDOUBLE fvalue,int min,int max,int flags)603 fmtfp(
604 char **sbuffer,
605 char **buffer,
606 size_t *currlen,
607 size_t *maxlen,
608 LDOUBLE fvalue,
609 int min,
610 int max,
611 int flags)
612 {
613 int signvalue = 0;
614 LDOUBLE ufvalue;
615 char iconvert[20];
616 char fconvert[20];
617 int iplace = 0;
618 int fplace = 0;
619 int padlen = 0;
620 int zpadlen = 0;
621 int caps = 0;
622 long intpart;
623 long fracpart;
624
625 if (max < 0)
626 max = 6;
627 ufvalue = abs_val(fvalue);
628 if (fvalue < 0)
629 signvalue = '-';
630 else if (flags & DP_F_PLUS)
631 signvalue = '+';
632 else if (flags & DP_F_SPACE)
633 signvalue = ' ';
634
635 intpart = (long)ufvalue;
636
637 /* sorry, we only support 9 digits past the decimal because of our
638 conversion method */
639 if (max > 9)
640 max = 9;
641
642 /* we "cheat" by converting the fractional part to integer by
643 multiplying by a factor of 10 */
644 fracpart = roundv((pow_10(max)) * (ufvalue - intpart));
645
646 if (fracpart >= (long)pow_10(max)) {
647 intpart++;
648 fracpart -= (long)pow_10(max);
649 }
650
651 /* convert integer part */
652 do {
653 iconvert[iplace++] =
654 (caps ? "0123456789ABCDEF"
655 : "0123456789abcdef")[intpart % 10];
656 intpart = (intpart / 10);
657 } while (intpart && (iplace < sizeof iconvert));
658 if (iplace == sizeof iconvert)
659 iplace--;
660 iconvert[iplace] = 0;
661
662 /* convert fractional part */
663 do {
664 fconvert[fplace++] =
665 (caps ? "0123456789ABCDEF"
666 : "0123456789abcdef")[fracpart % 10];
667 fracpart = (fracpart / 10);
668 } while (fplace < max);
669 if (fplace == sizeof fconvert)
670 fplace--;
671 fconvert[fplace] = 0;
672
673 /* -1 for decimal point, another -1 if we are printing a sign */
674 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
675 zpadlen = max - fplace;
676 if (zpadlen < 0)
677 zpadlen = 0;
678 if (padlen < 0)
679 padlen = 0;
680 if (flags & DP_F_MINUS)
681 padlen = -padlen;
682
683 if ((flags & DP_F_ZERO) && (padlen > 0)) {
684 if (signvalue) {
685 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
686 --padlen;
687 signvalue = 0;
688 }
689 while (padlen > 0) {
690 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
691 --padlen;
692 }
693 }
694 while (padlen > 0) {
695 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
696 --padlen;
697 }
698 if (signvalue)
699 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
700
701 while (iplace > 0)
702 doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]);
703
704 /*
705 * Decimal point. This should probably use locale to find the correct
706 * char to print out.
707 */
708 if (max > 0 || (flags & DP_F_NUM)) {
709 doapr_outch(sbuffer, buffer, currlen, maxlen, '.');
710
711 while (fplace > 0)
712 doapr_outch(sbuffer, buffer, currlen, maxlen, fconvert[--fplace]);
713 }
714 while (zpadlen > 0) {
715 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
716 --zpadlen;
717 }
718
719 while (padlen < 0) {
720 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
721 ++padlen;
722 }
723 }
724
725 static void
doapr_outch(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,int c)726 doapr_outch(
727 char **sbuffer,
728 char **buffer,
729 size_t *currlen,
730 size_t *maxlen,
731 int c)
732 {
733 /* If we haven't at least one buffer, someone has doe a big booboo */
734 assert(*sbuffer != NULL || buffer != NULL);
735
736 if (buffer) {
737 while (*currlen >= *maxlen) {
738 if (*buffer == NULL) {
739 if (*maxlen == 0)
740 *maxlen = 1024;
741 *buffer = OPENSSL_malloc(*maxlen);
742 if (*currlen > 0) {
743 assert(*sbuffer != NULL);
744 memcpy(*buffer, *sbuffer, *currlen);
745 }
746 *sbuffer = NULL;
747 } else {
748 *maxlen += 1024;
749 *buffer = OPENSSL_realloc(*buffer, *maxlen);
750 }
751 }
752 /* What to do if *buffer is NULL? */
753 assert(*sbuffer != NULL || *buffer != NULL);
754 }
755
756 if (*currlen < *maxlen) {
757 if (*sbuffer)
758 (*sbuffer)[(*currlen)++] = (char)c;
759 else
760 (*buffer)[(*currlen)++] = (char)c;
761 }
762
763 return;
764 }
765
766 /***************************************************************************/
767
BIO_printf(BIO * bio,const char * format,...)768 int BIO_printf (BIO *bio, const char *format, ...)
769 {
770 va_list args;
771 int ret;
772
773 va_start(args, format);
774
775 ret = BIO_vprintf(bio, format, args);
776
777 va_end(args);
778 return(ret);
779 }
780
BIO_vprintf(BIO * bio,const char * format,va_list args)781 int BIO_vprintf (BIO *bio, const char *format, va_list args)
782 {
783 int ret;
784 size_t retlen;
785 char hugebuf[1024*2]; /* Was previously 10k, which is unreasonable
786 in small-stack environments, like threads
787 or DOS programs. */
788 char *hugebufp = hugebuf;
789 size_t hugebufsize = sizeof(hugebuf);
790 char *dynbuf = NULL;
791 int ignored;
792
793 dynbuf = NULL;
794 CRYPTO_push_info("doapr()");
795 _dopr(&hugebufp, &dynbuf, &hugebufsize,
796 &retlen, &ignored, format, args);
797 if (dynbuf)
798 {
799 ret=BIO_write(bio, dynbuf, (int)retlen);
800 OPENSSL_free(dynbuf);
801 }
802 else
803 {
804 ret=BIO_write(bio, hugebuf, (int)retlen);
805 }
806 CRYPTO_pop_info();
807 return(ret);
808 }
809
810 /* As snprintf is not available everywhere, we provide our own implementation.
811 * In case of overflow or error, this returns -1.
812 * This function has nothing to do with BIOs, but it's closely related
813 * to BIO_printf, and we need *some* name prefix ...
814 * (XXX the function should be renamed, but to what?) */
BIO_snprintf(char * buf,size_t n,const char * format,...)815 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
816 {
817 va_list args;
818 int ret;
819
820 va_start(args, format);
821
822 ret = BIO_vsnprintf(buf, n, format, args);
823
824 va_end(args);
825 return(ret);
826 }
827
BIO_vsnprintf(char * buf,size_t n,const char * format,va_list args)828 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
829 {
830 size_t retlen;
831 int truncated;
832
833 _dopr(&buf, NULL, &n, &retlen, &truncated, format, args);
834
835 if (truncated)
836 /* In case of truncation, return -1 unlike traditional snprintf.
837 * (Current drafts for ISO/IEC 9899 say snprintf should return
838 * the number of characters that would have been written,
839 * had the buffer been large enough, as it did historically.) */
840 return -1;
841 else
842 return (retlen <= INT_MAX) ? (int)retlen : -1;
843 }
844