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 /***************************************************************************/
89
90 /*
91 * Copyright Patrick Powell 1995
92 * This code is based on code written by Patrick Powell <papowell@astart.com>
93 * It may be used for any purpose as long as this notice remains intact
94 * on all source code distributions.
95 */
96
97 /*
98 * This code contains numerious changes and enhancements which were
99 * made by lots of contributors over the last years to Patrick Powell's
100 * original code:
101 *
102 * o Patrick Powell <papowell@astart.com> (1995)
103 * o Brandon Long <blong@fiction.net> (1996, for Mutt)
104 * o Thomas Roessler <roessler@guug.de> (1998, for Mutt)
105 * o Michael Elkins <me@cs.hmc.edu> (1998, for Mutt)
106 * o Andrew Tridgell <tridge@samba.org> (1998, for Samba)
107 * o Luke Mewburn <lukem@netbsd.org> (1999, for LukemFTP)
108 * o Ralf S. Engelschall <rse@engelschall.com> (1999, for Pth)
109 * o ... (for OpenSSL)
110 */
111
112 #ifdef HAVE_LONG_DOUBLE
113 #define LDOUBLE long double
114 #else
115 #define LDOUBLE double
116 #endif
117
118 #if HAVE_LONG_LONG
119 # if defined(OPENSSL_SYS_WIN32) && !defined(__GNUC__)
120 # define LLONG __int64
121 # else
122 # define LLONG long long
123 # endif
124 #else
125 #define LLONG long
126 #endif
127
128 static void fmtstr (char **, char **, size_t *, size_t *,
129 const char *, int, int, int);
130 static void fmtint (char **, char **, size_t *, size_t *,
131 LLONG, int, int, int, int);
132 #ifndef OPENSSL_SYS_UEFI
133 static void fmtfp (char **, char **, size_t *, size_t *,
134 LDOUBLE, int, int, int);
135 #endif
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 #ifndef OPENSSL_SYS_UEFI
183 LDOUBLE fvalue;
184 #endif
185 char *strvalue;
186 int min;
187 int max;
188 int state;
189 int flags;
190 int cflags;
191 size_t currlen;
192
193 state = DP_S_DEFAULT;
194 flags = currlen = cflags = min = 0;
195 max = -1;
196 ch = *format++;
197
198 while (state != DP_S_DONE) {
199 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
200 state = DP_S_DONE;
201
202 switch (state) {
203 case DP_S_DEFAULT:
204 if (ch == '%')
205 state = DP_S_FLAGS;
206 else
207 doapr_outch(sbuffer,buffer, &currlen, maxlen, ch);
208 ch = *format++;
209 break;
210 case DP_S_FLAGS:
211 switch (ch) {
212 case '-':
213 flags |= DP_F_MINUS;
214 ch = *format++;
215 break;
216 case '+':
217 flags |= DP_F_PLUS;
218 ch = *format++;
219 break;
220 case ' ':
221 flags |= DP_F_SPACE;
222 ch = *format++;
223 break;
224 case '#':
225 flags |= DP_F_NUM;
226 ch = *format++;
227 break;
228 case '0':
229 flags |= DP_F_ZERO;
230 ch = *format++;
231 break;
232 default:
233 state = DP_S_MIN;
234 break;
235 }
236 break;
237 case DP_S_MIN:
238 if (isdigit((unsigned char)ch)) {
239 min = 10 * min + char_to_int(ch);
240 ch = *format++;
241 } else if (ch == '*') {
242 min = va_arg(args, int);
243 ch = *format++;
244 state = DP_S_DOT;
245 } else
246 state = DP_S_DOT;
247 break;
248 case DP_S_DOT:
249 if (ch == '.') {
250 state = DP_S_MAX;
251 ch = *format++;
252 } else
253 state = DP_S_MOD;
254 break;
255 case DP_S_MAX:
256 if (isdigit((unsigned char)ch)) {
257 if (max < 0)
258 max = 0;
259 max = 10 * max + char_to_int(ch);
260 ch = *format++;
261 } else if (ch == '*') {
262 max = va_arg(args, int);
263 ch = *format++;
264 state = DP_S_MOD;
265 } else
266 state = DP_S_MOD;
267 break;
268 case DP_S_MOD:
269 switch (ch) {
270 case 'h':
271 cflags = DP_C_SHORT;
272 ch = *format++;
273 break;
274 case 'l':
275 if (*format == 'l') {
276 cflags = DP_C_LLONG;
277 format++;
278 } else
279 cflags = DP_C_LONG;
280 ch = *format++;
281 break;
282 case 'q':
283 cflags = DP_C_LLONG;
284 ch = *format++;
285 break;
286 case 'L':
287 cflags = DP_C_LDOUBLE;
288 ch = *format++;
289 break;
290 default:
291 break;
292 }
293 state = DP_S_CONV;
294 break;
295 case DP_S_CONV:
296 switch (ch) {
297 case 'd':
298 case 'i':
299 switch (cflags) {
300 case DP_C_SHORT:
301 value = (short int)va_arg(args, int);
302 break;
303 case DP_C_LONG:
304 value = va_arg(args, long int);
305 break;
306 case DP_C_LLONG:
307 value = va_arg(args, LLONG);
308 break;
309 default:
310 value = va_arg(args, int);
311 break;
312 }
313 fmtint(sbuffer, buffer, &currlen, maxlen,
314 value, 10, min, max, flags);
315 break;
316 case 'X':
317 flags |= DP_F_UP;
318 /* FALLTHROUGH */
319 case 'x':
320 case 'o':
321 case 'u':
322 flags |= DP_F_UNSIGNED;
323 switch (cflags) {
324 case DP_C_SHORT:
325 value = (unsigned short int)va_arg(args, unsigned int);
326 break;
327 case DP_C_LONG:
328 value = (LLONG) va_arg(args,
329 unsigned long int);
330 break;
331 case DP_C_LLONG:
332 value = va_arg(args, unsigned LLONG);
333 break;
334 default:
335 value = (LLONG) va_arg(args,
336 unsigned int);
337 break;
338 }
339 fmtint(sbuffer, buffer, &currlen, maxlen, value,
340 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
341 min, max, flags);
342 break;
343 #ifndef OPENSSL_SYS_UEFI
344 case 'f':
345 if (cflags == DP_C_LDOUBLE)
346 fvalue = va_arg(args, LDOUBLE);
347 else
348 fvalue = va_arg(args, double);
349 fmtfp(sbuffer, buffer, &currlen, maxlen,
350 fvalue, min, max, flags);
351 break;
352 case 'E':
353 flags |= DP_F_UP;
354 case 'e':
355 if (cflags == DP_C_LDOUBLE)
356 fvalue = va_arg(args, LDOUBLE);
357 else
358 fvalue = va_arg(args, double);
359 break;
360 case 'G':
361 flags |= DP_F_UP;
362 case 'g':
363 if (cflags == DP_C_LDOUBLE)
364 fvalue = va_arg(args, LDOUBLE);
365 else
366 fvalue = va_arg(args, double);
367 break;
368 #endif
369 case 'c':
370 doapr_outch(sbuffer, buffer, &currlen, maxlen,
371 va_arg(args, int));
372 break;
373 case 's':
374 strvalue = va_arg(args, char *);
375 if (max < 0) {
376 if (buffer)
377 max = INT_MAX;
378 else
379 max = *maxlen;
380 }
381 fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
382 flags, min, max);
383 break;
384 case 'p':
385 value = (long)va_arg(args, void *);
386 fmtint(sbuffer, buffer, &currlen, maxlen,
387 value, 16, min, max, flags|DP_F_NUM);
388 break;
389 case 'n': /* XXX */
390 if (cflags == DP_C_SHORT) {
391 short int *num;
392 num = va_arg(args, short int *);
393 *num = currlen;
394 } else if (cflags == DP_C_LONG) { /* XXX */
395 long int *num;
396 num = va_arg(args, long int *);
397 *num = (long int) currlen;
398 } else if (cflags == DP_C_LLONG) { /* XXX */
399 LLONG *num;
400 num = va_arg(args, LLONG *);
401 *num = (LLONG) currlen;
402 } else {
403 int *num;
404 num = va_arg(args, int *);
405 *num = currlen;
406 }
407 break;
408 case '%':
409 doapr_outch(sbuffer, buffer, &currlen, maxlen, ch);
410 break;
411 case 'w':
412 /* not supported yet, treat as next char */
413 ch = *format++;
414 break;
415 default:
416 /* unknown, skip */
417 break;
418 }
419 ch = *format++;
420 state = DP_S_DEFAULT;
421 flags = cflags = min = 0;
422 max = -1;
423 break;
424 case DP_S_DONE:
425 break;
426 default:
427 break;
428 }
429 }
430 *truncated = (currlen > *maxlen - 1);
431 if (*truncated)
432 currlen = *maxlen - 1;
433 doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0');
434 *retlen = currlen - 1;
435 return;
436 }
437
438 static void
fmtstr(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,const char * value,int flags,int min,int max)439 fmtstr(
440 char **sbuffer,
441 char **buffer,
442 size_t *currlen,
443 size_t *maxlen,
444 const char *value,
445 int flags,
446 int min,
447 int max)
448 {
449 int padlen, strln;
450 int cnt = 0;
451
452 if (value == 0)
453 value = "<NULL>";
454 for (strln = 0; value[strln]; ++strln)
455 ;
456 padlen = min - strln;
457 if (padlen < 0)
458 padlen = 0;
459 if (flags & DP_F_MINUS)
460 padlen = -padlen;
461
462 while ((padlen > 0) && (cnt < max)) {
463 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
464 --padlen;
465 ++cnt;
466 }
467 while (*value && (cnt < max)) {
468 doapr_outch(sbuffer, buffer, currlen, maxlen, *value++);
469 ++cnt;
470 }
471 while ((padlen < 0) && (cnt < max)) {
472 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
473 ++padlen;
474 ++cnt;
475 }
476 }
477
478 static void
fmtint(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,LLONG value,int base,int min,int max,int flags)479 fmtint(
480 char **sbuffer,
481 char **buffer,
482 size_t *currlen,
483 size_t *maxlen,
484 LLONG value,
485 int base,
486 int min,
487 int max,
488 int flags)
489 {
490 int signvalue = 0;
491 const char *prefix = "";
492 unsigned LLONG uvalue;
493 char convert[DECIMAL_SIZE(value)+3];
494 int place = 0;
495 int spadlen = 0;
496 int zpadlen = 0;
497 int caps = 0;
498
499 if (max < 0)
500 max = 0;
501 uvalue = value;
502 if (!(flags & DP_F_UNSIGNED)) {
503 if (value < 0) {
504 signvalue = '-';
505 uvalue = -value;
506 } else if (flags & DP_F_PLUS)
507 signvalue = '+';
508 else if (flags & DP_F_SPACE)
509 signvalue = ' ';
510 }
511 if (flags & DP_F_NUM) {
512 if (base == 8) prefix = "0";
513 if (base == 16) prefix = "0x";
514 }
515 if (flags & DP_F_UP)
516 caps = 1;
517 do {
518 convert[place++] =
519 (caps ? "0123456789ABCDEF" : "0123456789abcdef")
520 [uvalue % (unsigned) base];
521 uvalue = (uvalue / (unsigned) base);
522 } while (uvalue && (place < (int)sizeof(convert)));
523 if (place == sizeof(convert))
524 place--;
525 convert[place] = 0;
526
527 zpadlen = max - place;
528 spadlen = min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
529 if (zpadlen < 0)
530 zpadlen = 0;
531 if (spadlen < 0)
532 spadlen = 0;
533 if (flags & DP_F_ZERO) {
534 zpadlen = OSSL_MAX(zpadlen, spadlen);
535 spadlen = 0;
536 }
537 if (flags & DP_F_MINUS)
538 spadlen = -spadlen;
539
540 /* spaces */
541 while (spadlen > 0) {
542 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
543 --spadlen;
544 }
545
546 /* sign */
547 if (signvalue)
548 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
549
550 /* prefix */
551 while (*prefix) {
552 doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix);
553 prefix++;
554 }
555
556 /* zeros */
557 if (zpadlen > 0) {
558 while (zpadlen > 0) {
559 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
560 --zpadlen;
561 }
562 }
563 /* digits */
564 while (place > 0)
565 doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]);
566
567 /* left justified spaces */
568 while (spadlen < 0) {
569 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
570 ++spadlen;
571 }
572 return;
573 }
574
575 #ifndef OPENSSL_SYS_UEFI
576 static LDOUBLE
abs_val(LDOUBLE value)577 abs_val(LDOUBLE value)
578 {
579 LDOUBLE result = value;
580 if (value < 0)
581 result = -value;
582 return result;
583 }
584
585 static LDOUBLE
pow_10(int in_exp)586 pow_10(int in_exp)
587 {
588 LDOUBLE result = 1;
589 while (in_exp) {
590 result *= 10;
591 in_exp--;
592 }
593 return result;
594 }
595
596 static long
roundv(LDOUBLE value)597 roundv(LDOUBLE value)
598 {
599 long intpart;
600 intpart = (long) value;
601 value = value - intpart;
602 if (value >= 0.5)
603 intpart++;
604 return intpart;
605 }
606
607 static void
fmtfp(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,LDOUBLE fvalue,int min,int max,int flags)608 fmtfp(
609 char **sbuffer,
610 char **buffer,
611 size_t *currlen,
612 size_t *maxlen,
613 LDOUBLE fvalue,
614 int min,
615 int max,
616 int flags)
617 {
618 int signvalue = 0;
619 LDOUBLE ufvalue;
620 char iconvert[20];
621 char fconvert[20];
622 int iplace = 0;
623 int fplace = 0;
624 int padlen = 0;
625 int zpadlen = 0;
626 int caps = 0;
627 long intpart;
628 long fracpart;
629 long max10;
630
631 if (max < 0)
632 max = 6;
633 ufvalue = abs_val(fvalue);
634 if (fvalue < 0)
635 signvalue = '-';
636 else if (flags & DP_F_PLUS)
637 signvalue = '+';
638 else if (flags & DP_F_SPACE)
639 signvalue = ' ';
640
641 intpart = (long)ufvalue;
642
643 /* sorry, we only support 9 digits past the decimal because of our
644 conversion method */
645 if (max > 9)
646 max = 9;
647
648 /* we "cheat" by converting the fractional part to integer by
649 multiplying by a factor of 10 */
650 max10 = roundv(pow_10(max));
651 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
652
653 if (fracpart >= max10) {
654 intpart++;
655 fracpart -= max10;
656 }
657
658 /* convert integer part */
659 do {
660 iconvert[iplace++] =
661 (caps ? "0123456789ABCDEF"
662 : "0123456789abcdef")[intpart % 10];
663 intpart = (intpart / 10);
664 } while (intpart && (iplace < (int)sizeof(iconvert)));
665 if (iplace == sizeof iconvert)
666 iplace--;
667 iconvert[iplace] = 0;
668
669 /* convert fractional part */
670 do {
671 fconvert[fplace++] =
672 (caps ? "0123456789ABCDEF"
673 : "0123456789abcdef")[fracpart % 10];
674 fracpart = (fracpart / 10);
675 } while (fplace < max);
676 if (fplace == sizeof fconvert)
677 fplace--;
678 fconvert[fplace] = 0;
679
680 /* -1 for decimal point, another -1 if we are printing a sign */
681 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
682 zpadlen = max - fplace;
683 if (zpadlen < 0)
684 zpadlen = 0;
685 if (padlen < 0)
686 padlen = 0;
687 if (flags & DP_F_MINUS)
688 padlen = -padlen;
689
690 if ((flags & DP_F_ZERO) && (padlen > 0)) {
691 if (signvalue) {
692 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
693 --padlen;
694 signvalue = 0;
695 }
696 while (padlen > 0) {
697 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
698 --padlen;
699 }
700 }
701 while (padlen > 0) {
702 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
703 --padlen;
704 }
705 if (signvalue)
706 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
707
708 while (iplace > 0)
709 doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]);
710
711 /*
712 * Decimal point. This should probably use locale to find the correct
713 * char to print out.
714 */
715 if (max > 0 || (flags & DP_F_NUM)) {
716 doapr_outch(sbuffer, buffer, currlen, maxlen, '.');
717
718 while (fplace > 0)
719 doapr_outch(sbuffer, buffer, currlen, maxlen, fconvert[--fplace]);
720 }
721 while (zpadlen > 0) {
722 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
723 --zpadlen;
724 }
725
726 while (padlen < 0) {
727 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
728 ++padlen;
729 }
730 }
731 #endif
732
733 static void
doapr_outch(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,int c)734 doapr_outch(
735 char **sbuffer,
736 char **buffer,
737 size_t *currlen,
738 size_t *maxlen,
739 int c)
740 {
741 /* If we haven't at least one buffer, someone has doe a big booboo */
742 assert(*sbuffer != NULL || buffer != NULL);
743
744 if (buffer) {
745 while (*currlen >= *maxlen) {
746 if (*buffer == NULL) {
747 if (*maxlen == 0)
748 *maxlen = 1024;
749 *buffer = OPENSSL_malloc(*maxlen);
750 if (*currlen > 0) {
751 assert(*sbuffer != NULL);
752 memcpy(*buffer, *sbuffer, *currlen);
753 }
754 *sbuffer = NULL;
755 } else {
756 *maxlen += 1024;
757 *buffer = OPENSSL_realloc(*buffer, *maxlen);
758 }
759 }
760 /* What to do if *buffer is NULL? */
761 assert(*sbuffer != NULL || *buffer != NULL);
762 }
763
764 if (*currlen < *maxlen) {
765 if (*sbuffer)
766 (*sbuffer)[(*currlen)++] = (char)c;
767 else
768 (*buffer)[(*currlen)++] = (char)c;
769 }
770
771 return;
772 }
773
774 /***************************************************************************/
775
BIO_printf(BIO * bio,const char * format,...)776 int BIO_printf (BIO *bio, const char *format, ...)
777 {
778 va_list args;
779 int ret;
780
781 va_start(args, format);
782
783 ret = BIO_vprintf(bio, format, args);
784
785 va_end(args);
786 return(ret);
787 }
788
BIO_vprintf(BIO * bio,const char * format,va_list args)789 int BIO_vprintf (BIO *bio, const char *format, va_list args)
790 {
791 int ret;
792 size_t retlen;
793 char hugebuf[1024*2]; /* Was previously 10k, which is unreasonable
794 in small-stack environments, like threads
795 or DOS programs. */
796 char *hugebufp = hugebuf;
797 size_t hugebufsize = sizeof(hugebuf);
798 char *dynbuf = NULL;
799 int ignored;
800
801 dynbuf = NULL;
802 CRYPTO_push_info("doapr()");
803 _dopr(&hugebufp, &dynbuf, &hugebufsize,
804 &retlen, &ignored, format, args);
805 if (dynbuf)
806 {
807 ret=BIO_write(bio, dynbuf, (int)retlen);
808 OPENSSL_free(dynbuf);
809 }
810 else
811 {
812 ret=BIO_write(bio, hugebuf, (int)retlen);
813 }
814 CRYPTO_pop_info();
815 return(ret);
816 }
817
818 /* As snprintf is not available everywhere, we provide our own implementation.
819 * This function has nothing to do with BIOs, but it's closely related
820 * to BIO_printf, and we need *some* name prefix ...
821 * (XXX the function should be renamed, but to what?) */
BIO_snprintf(char * buf,size_t n,const char * format,...)822 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
823 {
824 va_list args;
825 int ret;
826
827 va_start(args, format);
828
829 ret = BIO_vsnprintf(buf, n, format, args);
830
831 va_end(args);
832 return(ret);
833 }
834
BIO_vsnprintf(char * buf,size_t n,const char * format,va_list args)835 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
836 {
837 size_t retlen;
838 int truncated;
839
840 _dopr(&buf, NULL, &n, &retlen, &truncated, format, args);
841
842 if (truncated)
843 /* In case of truncation, return -1 like traditional snprintf.
844 * (Current drafts for ISO/IEC 9899 say snprintf should return
845 * the number of characters that would have been written,
846 * had the buffer been large enough.) */
847 return -1;
848 else
849 return (retlen <= INT_MAX) ? (int)retlen : -1;
850 }
851