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 int fmtstr(char **, char **, size_t *, size_t *,
129 const char *, int, int, int);
130 static int fmtint(char **, char **, size_t *, size_t *,
131 LLONG, int, int, int, int);
132 static int fmtfp(char **, char **, size_t *, size_t *,
133 LDOUBLE, int, int, int);
134 static int doapr_outch(char **, char **, size_t *, size_t *, int);
135 static int _dopr(char **sbuffer, char **buffer,
136 size_t *maxlen, size_t *retlen, int *truncated,
137 const char *format, va_list args);
138
139 /* format read states */
140 #define DP_S_DEFAULT 0
141 #define DP_S_FLAGS 1
142 #define DP_S_MIN 2
143 #define DP_S_DOT 3
144 #define DP_S_MAX 4
145 #define DP_S_MOD 5
146 #define DP_S_CONV 6
147 #define DP_S_DONE 7
148
149 /* format flags - Bits */
150 #define DP_F_MINUS (1 << 0)
151 #define DP_F_PLUS (1 << 1)
152 #define DP_F_SPACE (1 << 2)
153 #define DP_F_NUM (1 << 3)
154 #define DP_F_ZERO (1 << 4)
155 #define DP_F_UP (1 << 5)
156 #define DP_F_UNSIGNED (1 << 6)
157
158 /* conversion flags */
159 #define DP_C_SHORT 1
160 #define DP_C_LONG 2
161 #define DP_C_LDOUBLE 3
162 #define DP_C_LLONG 4
163
164 /* some handy macros */
165 #define char_to_int(p) (p - '0')
166 #define OSSL_MAX(p,q) ((p >= q) ? p : q)
167
168 static int
_dopr(char ** sbuffer,char ** buffer,size_t * maxlen,size_t * retlen,int * truncated,const char * format,va_list args)169 _dopr(char **sbuffer,
170 char **buffer,
171 size_t *maxlen,
172 size_t *retlen, int *truncated, const char *format, va_list args)
173 {
174 char ch;
175 LLONG value;
176 LDOUBLE fvalue;
177 char *strvalue;
178 int min;
179 int max;
180 int state;
181 int flags;
182 int cflags;
183 size_t currlen;
184
185 state = DP_S_DEFAULT;
186 flags = currlen = cflags = min = 0;
187 max = -1;
188 ch = *format++;
189
190 while (state != DP_S_DONE) {
191 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
192 state = DP_S_DONE;
193
194 switch (state) {
195 case DP_S_DEFAULT:
196 if (ch == '%')
197 state = DP_S_FLAGS;
198 else
199 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
200 return 0;
201 ch = *format++;
202 break;
203 case DP_S_FLAGS:
204 switch (ch) {
205 case '-':
206 flags |= DP_F_MINUS;
207 ch = *format++;
208 break;
209 case '+':
210 flags |= DP_F_PLUS;
211 ch = *format++;
212 break;
213 case ' ':
214 flags |= DP_F_SPACE;
215 ch = *format++;
216 break;
217 case '#':
218 flags |= DP_F_NUM;
219 ch = *format++;
220 break;
221 case '0':
222 flags |= DP_F_ZERO;
223 ch = *format++;
224 break;
225 default:
226 state = DP_S_MIN;
227 break;
228 }
229 break;
230 case DP_S_MIN:
231 if (isdigit((unsigned char)ch)) {
232 min = 10 * min + char_to_int(ch);
233 ch = *format++;
234 } else if (ch == '*') {
235 min = va_arg(args, int);
236 ch = *format++;
237 state = DP_S_DOT;
238 } else
239 state = DP_S_DOT;
240 break;
241 case DP_S_DOT:
242 if (ch == '.') {
243 state = DP_S_MAX;
244 ch = *format++;
245 } else
246 state = DP_S_MOD;
247 break;
248 case DP_S_MAX:
249 if (isdigit((unsigned char)ch)) {
250 if (max < 0)
251 max = 0;
252 max = 10 * max + char_to_int(ch);
253 ch = *format++;
254 } else if (ch == '*') {
255 max = va_arg(args, int);
256 ch = *format++;
257 state = DP_S_MOD;
258 } else
259 state = DP_S_MOD;
260 break;
261 case DP_S_MOD:
262 switch (ch) {
263 case 'h':
264 cflags = DP_C_SHORT;
265 ch = *format++;
266 break;
267 case 'l':
268 if (*format == 'l') {
269 cflags = DP_C_LLONG;
270 format++;
271 } else
272 cflags = DP_C_LONG;
273 ch = *format++;
274 break;
275 case 'q':
276 cflags = DP_C_LLONG;
277 ch = *format++;
278 break;
279 case 'L':
280 cflags = DP_C_LDOUBLE;
281 ch = *format++;
282 break;
283 default:
284 break;
285 }
286 state = DP_S_CONV;
287 break;
288 case DP_S_CONV:
289 switch (ch) {
290 case 'd':
291 case 'i':
292 switch (cflags) {
293 case DP_C_SHORT:
294 value = (short int)va_arg(args, int);
295 break;
296 case DP_C_LONG:
297 value = va_arg(args, long int);
298 break;
299 case DP_C_LLONG:
300 value = va_arg(args, LLONG);
301 break;
302 default:
303 value = va_arg(args, int);
304 break;
305 }
306 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
307 max, flags))
308 return 0;
309 break;
310 case 'X':
311 flags |= DP_F_UP;
312 /* FALLTHROUGH */
313 case 'x':
314 case 'o':
315 case 'u':
316 flags |= DP_F_UNSIGNED;
317 switch (cflags) {
318 case DP_C_SHORT:
319 value = (unsigned short int)va_arg(args, unsigned int);
320 break;
321 case DP_C_LONG:
322 value = (LLONG) va_arg(args, unsigned long int);
323 break;
324 case DP_C_LLONG:
325 value = va_arg(args, unsigned LLONG);
326 break;
327 default:
328 value = (LLONG) va_arg(args, unsigned int);
329 break;
330 }
331 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
332 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
333 min, max, flags))
334 return 0;
335 break;
336 case 'f':
337 if (cflags == DP_C_LDOUBLE)
338 fvalue = va_arg(args, LDOUBLE);
339 else
340 fvalue = va_arg(args, double);
341 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
342 flags))
343 return 0;
344 break;
345 case 'E':
346 flags |= DP_F_UP;
347 case 'e':
348 if (cflags == DP_C_LDOUBLE)
349 fvalue = va_arg(args, LDOUBLE);
350 else
351 fvalue = va_arg(args, double);
352 break;
353 case 'G':
354 flags |= DP_F_UP;
355 case 'g':
356 if (cflags == DP_C_LDOUBLE)
357 fvalue = va_arg(args, LDOUBLE);
358 else
359 fvalue = va_arg(args, double);
360 break;
361 case 'c':
362 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen,
363 va_arg(args, int)))
364 return 0;
365 break;
366 case 's':
367 strvalue = va_arg(args, char *);
368 if (max < 0) {
369 if (buffer)
370 max = INT_MAX;
371 else
372 max = *maxlen;
373 }
374 if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
375 flags, min, max))
376 return 0;
377 break;
378 case 'p':
379 value = (long)va_arg(args, void *);
380 if (!fmtint(sbuffer, buffer, &currlen, maxlen,
381 value, 16, min, max, flags | DP_F_NUM))
382 return 0;
383 break;
384 case 'n': /* XXX */
385 if (cflags == DP_C_SHORT) {
386 short int *num;
387 num = va_arg(args, short int *);
388 *num = currlen;
389 } else if (cflags == DP_C_LONG) { /* XXX */
390 long int *num;
391 num = va_arg(args, long int *);
392 *num = (long int)currlen;
393 } else if (cflags == DP_C_LLONG) { /* XXX */
394 LLONG *num;
395 num = va_arg(args, LLONG *);
396 *num = (LLONG) currlen;
397 } else {
398 int *num;
399 num = va_arg(args, int *);
400 *num = currlen;
401 }
402 break;
403 case '%':
404 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
405 return 0;
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 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
430 return 0;
431 *retlen = currlen - 1;
432 return 1;
433 }
434
435 static int
fmtstr(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,const char * value,int flags,int min,int max)436 fmtstr(char **sbuffer,
437 char **buffer,
438 size_t *currlen,
439 size_t *maxlen, const char *value, int flags, int min, int max)
440 {
441 int padlen;
442 size_t strln;
443 int cnt = 0;
444
445 if (value == 0)
446 value = "<NULL>";
447
448 strln = strlen(value);
449 if (strln > INT_MAX)
450 strln = INT_MAX;
451
452 padlen = min - strln;
453 if (min < 0 || padlen < 0)
454 padlen = 0;
455 if (flags & DP_F_MINUS)
456 padlen = -padlen;
457
458 while ((padlen > 0) && (cnt < max)) {
459 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
460 return 0;
461 --padlen;
462 ++cnt;
463 }
464 while (*value && (cnt < max)) {
465 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
466 return 0;
467 ++cnt;
468 }
469 while ((padlen < 0) && (cnt < max)) {
470 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
471 return 0;
472 ++padlen;
473 ++cnt;
474 }
475 return 1;
476 }
477
478 static int
fmtint(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,LLONG value,int base,int min,int max,int flags)479 fmtint(char **sbuffer,
480 char **buffer,
481 size_t *currlen,
482 size_t *maxlen, LLONG value, int base, int min, int max, int flags)
483 {
484 int signvalue = 0;
485 const char *prefix = "";
486 unsigned LLONG uvalue;
487 char convert[DECIMAL_SIZE(value) + 3];
488 int place = 0;
489 int spadlen = 0;
490 int zpadlen = 0;
491 int caps = 0;
492
493 if (max < 0)
494 max = 0;
495 uvalue = value;
496 if (!(flags & DP_F_UNSIGNED)) {
497 if (value < 0) {
498 signvalue = '-';
499 uvalue = -value;
500 } else if (flags & DP_F_PLUS)
501 signvalue = '+';
502 else if (flags & DP_F_SPACE)
503 signvalue = ' ';
504 }
505 if (flags & DP_F_NUM) {
506 if (base == 8)
507 prefix = "0";
508 if (base == 16)
509 prefix = "0x";
510 }
511 if (flags & DP_F_UP)
512 caps = 1;
513 do {
514 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
515 [uvalue % (unsigned)base];
516 uvalue = (uvalue / (unsigned)base);
517 } while (uvalue && (place < (int)sizeof(convert)));
518 if (place == sizeof(convert))
519 place--;
520 convert[place] = 0;
521
522 zpadlen = max - place;
523 spadlen =
524 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 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
539 return 0;
540 --spadlen;
541 }
542
543 /* sign */
544 if (signvalue)
545 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
546 return 0;
547
548 /* prefix */
549 while (*prefix) {
550 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
551 return 0;
552 prefix++;
553 }
554
555 /* zeros */
556 if (zpadlen > 0) {
557 while (zpadlen > 0) {
558 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
559 return 0;
560 --zpadlen;
561 }
562 }
563 /* digits */
564 while (place > 0) {
565 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
566 return 0;
567 }
568
569 /* left justified spaces */
570 while (spadlen < 0) {
571 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
572 return 0;
573 ++spadlen;
574 }
575 return 1;
576 }
577
abs_val(LDOUBLE value)578 static LDOUBLE abs_val(LDOUBLE value)
579 {
580 LDOUBLE result = value;
581 if (value < 0)
582 result = -value;
583 return result;
584 }
585
pow_10(int in_exp)586 static LDOUBLE 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
roundv(LDOUBLE value)596 static long roundv(LDOUBLE value)
597 {
598 long intpart;
599 intpart = (long)value;
600 value = value - intpart;
601 if (value >= 0.5)
602 intpart++;
603 return intpart;
604 }
605
606 static int
fmtfp(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,LDOUBLE fvalue,int min,int max,int flags)607 fmtfp(char **sbuffer,
608 char **buffer,
609 size_t *currlen,
610 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags)
611 {
612 int signvalue = 0;
613 LDOUBLE ufvalue;
614 char iconvert[20];
615 char fconvert[20];
616 int iplace = 0;
617 int fplace = 0;
618 int padlen = 0;
619 int zpadlen = 0;
620 int caps = 0;
621 long intpart;
622 long fracpart;
623 long max10;
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 /*
638 * sorry, we only support 9 digits past the decimal because of our
639 * conversion method
640 */
641 if (max > 9)
642 max = 9;
643
644 /*
645 * we "cheat" by converting the fractional part to integer by multiplying
646 * by a factor of 10
647 */
648 max10 = roundv(pow_10(max));
649 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
650
651 if (fracpart >= max10) {
652 intpart++;
653 fracpart -= max10;
654 }
655
656 /* convert integer part */
657 do {
658 iconvert[iplace++] =
659 (caps ? "0123456789ABCDEF" : "0123456789abcdef")[intpart % 10];
660 intpart = (intpart / 10);
661 } while (intpart && (iplace < (int)sizeof(iconvert)));
662 if (iplace == sizeof iconvert)
663 iplace--;
664 iconvert[iplace] = 0;
665
666 /* convert fractional part */
667 do {
668 fconvert[fplace++] =
669 (caps ? "0123456789ABCDEF" : "0123456789abcdef")[fracpart % 10];
670 fracpart = (fracpart / 10);
671 } while (fplace < max);
672 if (fplace == sizeof fconvert)
673 fplace--;
674 fconvert[fplace] = 0;
675
676 /* -1 for decimal point, another -1 if we are printing a sign */
677 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
678 zpadlen = max - fplace;
679 if (zpadlen < 0)
680 zpadlen = 0;
681 if (padlen < 0)
682 padlen = 0;
683 if (flags & DP_F_MINUS)
684 padlen = -padlen;
685
686 if ((flags & DP_F_ZERO) && (padlen > 0)) {
687 if (signvalue) {
688 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
689 return 0;
690 --padlen;
691 signvalue = 0;
692 }
693 while (padlen > 0) {
694 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
695 return 0;
696 --padlen;
697 }
698 }
699 while (padlen > 0) {
700 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
701 return 0;
702 --padlen;
703 }
704 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
705 return 0;
706
707 while (iplace > 0) {
708 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
709 return 0;
710 }
711
712 /*
713 * Decimal point. This should probably use locale to find the correct
714 * char to print out.
715 */
716 if (max > 0 || (flags & DP_F_NUM)) {
717 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
718 return 0;
719
720 while (fplace > 0) {
721 if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
722 fconvert[--fplace]))
723 return 0;
724 }
725 }
726 while (zpadlen > 0) {
727 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
728 return 0;
729 --zpadlen;
730 }
731
732 while (padlen < 0) {
733 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
734 return 0;
735 ++padlen;
736 }
737 return 1;
738 }
739
740 #define BUFFER_INC 1024
741
742 static int
doapr_outch(char ** sbuffer,char ** buffer,size_t * currlen,size_t * maxlen,int c)743 doapr_outch(char **sbuffer,
744 char **buffer, size_t *currlen, size_t *maxlen, int c)
745 {
746 /* If we haven't at least one buffer, someone has doe a big booboo */
747 assert(*sbuffer != NULL || buffer != NULL);
748
749 /* |currlen| must always be <= |*maxlen| */
750 assert(*currlen <= *maxlen);
751
752 if (buffer && *currlen == *maxlen) {
753 if (*maxlen > INT_MAX - BUFFER_INC)
754 return 0;
755
756 *maxlen += BUFFER_INC;
757 if (*buffer == NULL) {
758 *buffer = OPENSSL_malloc(*maxlen);
759 if (*buffer == NULL)
760 return 0;
761 if (*currlen > 0) {
762 assert(*sbuffer != NULL);
763 memcpy(*buffer, *sbuffer, *currlen);
764 }
765 *sbuffer = NULL;
766 } else {
767 char *tmpbuf;
768 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
769 if (tmpbuf == NULL)
770 return 0;
771 *buffer = tmpbuf;
772 }
773 }
774
775 if (*currlen < *maxlen) {
776 if (*sbuffer)
777 (*sbuffer)[(*currlen)++] = (char)c;
778 else
779 (*buffer)[(*currlen)++] = (char)c;
780 }
781
782 return 1;
783 }
784
785 /***************************************************************************/
786
BIO_printf(BIO * bio,const char * format,...)787 int BIO_printf(BIO *bio, const char *format, ...)
788 {
789 va_list args;
790 int ret;
791
792 va_start(args, format);
793
794 ret = BIO_vprintf(bio, format, args);
795
796 va_end(args);
797 return (ret);
798 }
799
BIO_vprintf(BIO * bio,const char * format,va_list args)800 int BIO_vprintf(BIO *bio, const char *format, va_list args)
801 {
802 int ret;
803 size_t retlen;
804 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
805 * in small-stack environments, like threads
806 * or DOS programs. */
807 char *hugebufp = hugebuf;
808 size_t hugebufsize = sizeof(hugebuf);
809 char *dynbuf = NULL;
810 int ignored;
811
812 dynbuf = NULL;
813 CRYPTO_push_info("doapr()");
814 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
815 args)) {
816 OPENSSL_free(dynbuf);
817 return -1;
818 }
819 if (dynbuf) {
820 ret = BIO_write(bio, dynbuf, (int)retlen);
821 OPENSSL_free(dynbuf);
822 } else {
823 ret = BIO_write(bio, hugebuf, (int)retlen);
824 }
825 CRYPTO_pop_info();
826 return (ret);
827 }
828
829 /*
830 * As snprintf is not available everywhere, we provide our own
831 * implementation. This function has nothing to do with BIOs, but it's
832 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
833 * function should be renamed, but to what?)
834 */
BIO_snprintf(char * buf,size_t n,const char * format,...)835 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
836 {
837 va_list args;
838 int ret;
839
840 va_start(args, format);
841
842 ret = BIO_vsnprintf(buf, n, format, args);
843
844 va_end(args);
845 return (ret);
846 }
847
BIO_vsnprintf(char * buf,size_t n,const char * format,va_list args)848 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
849 {
850 size_t retlen;
851 int truncated;
852
853 if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
854 return -1;
855
856 if (truncated)
857 /*
858 * In case of truncation, return -1 like traditional snprintf.
859 * (Current drafts for ISO/IEC 9899 say snprintf should return the
860 * number of characters that would have been written, had the buffer
861 * been large enough.)
862 */
863 return -1;
864 else
865 return (retlen <= INT_MAX) ? (int)retlen : -1;
866 }
867