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192.168.1.100 / 7520V3V / bfc6e71ee409bcae7f7b6850f4ebfbd3091c5851 / . / ap / lib / libssl / openssl-1.1.1o / crypto / bio / b_print.c
blob: c4ed364d72f6a463f337ec9db62572e417a25298 [file] [log] [blame]
xf.libfc6e712025-02-07 01:54:34 -0800[diff] [blame^]1/*
2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <string.h>
12#include "internal/cryptlib.h"
13#include "crypto/ctype.h"
14#include "internal/numbers.h"
15#include <openssl/bio.h>
16#include <openssl/opensslconf.h>
17
18/*
19 * Copyright Patrick Powell 1995
20 * This code is based on code written by Patrick Powell <papowell@astart.com>
21 * It may be used for any purpose as long as this notice remains intact
22 * on all source code distributions.
23 */
24
25#ifdef HAVE_LONG_DOUBLE
26# define LDOUBLE long double
27#else
28# define LDOUBLE double
29#endif
30
31static int fmtstr(char **, char **, size_t *, size_t *,
32 const char *, int, int, int);
33static int fmtint(char **, char **, size_t *, size_t *,
34 int64_t, int, int, int, int);
35#ifndef OPENSSL_SYS_UEFI
36static int fmtfp(char **, char **, size_t *, size_t *,
37 LDOUBLE, int, int, int, int);
38#endif
39static int doapr_outch(char **, char **, size_t *, size_t *, int);
40static int _dopr(char **sbuffer, char **buffer,
41 size_t *maxlen, size_t *retlen, int *truncated,
42 const char *format, va_list args);
43
44/* format read states */
45#define DP_S_DEFAULT 0
46#define DP_S_FLAGS 1
47#define DP_S_MIN 2
48#define DP_S_DOT 3
49#define DP_S_MAX 4
50#define DP_S_MOD 5
51#define DP_S_CONV 6
52#define DP_S_DONE 7
53
54/* format flags - Bits */
55/* left-aligned padding */
56#define DP_F_MINUS (1 << 0)
57/* print an explicit '+' for a value with positive sign */
58#define DP_F_PLUS (1 << 1)
59/* print an explicit ' ' for a value with positive sign */
60#define DP_F_SPACE (1 << 2)
61/* print 0/0x prefix for octal/hex and decimal point for floating point */
62#define DP_F_NUM (1 << 3)
63/* print leading zeroes */
64#define DP_F_ZERO (1 << 4)
65/* print HEX in UPPPERcase */
66#define DP_F_UP (1 << 5)
67/* treat value as unsigned */
68#define DP_F_UNSIGNED (1 << 6)
69
70/* conversion flags */
71#define DP_C_SHORT 1
72#define DP_C_LONG 2
73#define DP_C_LDOUBLE 3
74#define DP_C_LLONG 4
75#define DP_C_SIZE 5
76
77/* Floating point formats */
78#define F_FORMAT 0
79#define E_FORMAT 1
80#define G_FORMAT 2
81
82/* some handy macros */
83#define char_to_int(p) (p - '0')
84#define OSSL_MAX(p,q) ((p >= q) ? p : q)
85
86static int
87_dopr(char **sbuffer,
88 char **buffer,
89 size_t *maxlen,
90 size_t *retlen, int *truncated, const char *format, va_list args)
91{
92 char ch;
93 int64_t value;
94#ifndef OPENSSL_SYS_UEFI
95 LDOUBLE fvalue;
96#endif
97 char *strvalue;
98 int min;
99 int max;
100 int state;
101 int flags;
102 int cflags;
103 size_t currlen;
104
105 state = DP_S_DEFAULT;
106 flags = currlen = cflags = min = 0;
107 max = -1;
108 ch = *format++;
109
110 while (state != DP_S_DONE) {
111 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
112 state = DP_S_DONE;
113
114 switch (state) {
115 case DP_S_DEFAULT:
116 if (ch == '%')
117 state = DP_S_FLAGS;
118 else
119 if (!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
120 return 0;
121 ch = *format++;
122 break;
123 case DP_S_FLAGS:
124 switch (ch) {
125 case '-':
126 flags |= DP_F_MINUS;
127 ch = *format++;
128 break;
129 case '+':
130 flags |= DP_F_PLUS;
131 ch = *format++;
132 break;
133 case ' ':
134 flags |= DP_F_SPACE;
135 ch = *format++;
136 break;
137 case '#':
138 flags |= DP_F_NUM;
139 ch = *format++;
140 break;
141 case '0':
142 flags |= DP_F_ZERO;
143 ch = *format++;
144 break;
145 default:
146 state = DP_S_MIN;
147 break;
148 }
149 break;
150 case DP_S_MIN:
151 if (ossl_isdigit(ch)) {
152 min = 10 * min + char_to_int(ch);
153 ch = *format++;
154 } else if (ch == '*') {
155 min = va_arg(args, int);
156 ch = *format++;
157 state = DP_S_DOT;
158 } else
159 state = DP_S_DOT;
160 break;
161 case DP_S_DOT:
162 if (ch == '.') {
163 state = DP_S_MAX;
164 ch = *format++;
165 } else
166 state = DP_S_MOD;
167 break;
168 case DP_S_MAX:
169 if (ossl_isdigit(ch)) {
170 if (max < 0)
171 max = 0;
172 max = 10 * max + char_to_int(ch);
173 ch = *format++;
174 } else if (ch == '*') {
175 max = va_arg(args, int);
176 ch = *format++;
177 state = DP_S_MOD;
178 } else
179 state = DP_S_MOD;
180 break;
181 case DP_S_MOD:
182 switch (ch) {
183 case 'h':
184 cflags = DP_C_SHORT;
185 ch = *format++;
186 break;
187 case 'l':
188 if (*format == 'l') {
189 cflags = DP_C_LLONG;
190 format++;
191 } else
192 cflags = DP_C_LONG;
193 ch = *format++;
194 break;
195 case 'q':
196 case 'j':
197 cflags = DP_C_LLONG;
198 ch = *format++;
199 break;
200 case 'L':
201 cflags = DP_C_LDOUBLE;
202 ch = *format++;
203 break;
204 case 'z':
205 cflags = DP_C_SIZE;
206 ch = *format++;
207 break;
208 default:
209 break;
210 }
211 state = DP_S_CONV;
212 break;
213 case DP_S_CONV:
214 switch (ch) {
215 case 'd':
216 case 'i':
217 switch (cflags) {
218 case DP_C_SHORT:
219 value = (short int)va_arg(args, int);
220 break;
221 case DP_C_LONG:
222 value = va_arg(args, long int);
223 break;
224 case DP_C_LLONG:
225 value = va_arg(args, int64_t);
226 break;
227 case DP_C_SIZE:
228 value = va_arg(args, ossl_ssize_t);
229 break;
230 default:
231 value = va_arg(args, int);
232 break;
233 }
234 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
235 max, flags))
236 return 0;
237 break;
238 case 'X':
239 flags |= DP_F_UP;
240 /* FALLTHROUGH */
241 case 'x':
242 case 'o':
243 case 'u':
244 flags |= DP_F_UNSIGNED;
245 switch (cflags) {
246 case DP_C_SHORT:
247 value = (unsigned short int)va_arg(args, unsigned int);
248 break;
249 case DP_C_LONG:
250 value = va_arg(args, unsigned long int);
251 break;
252 case DP_C_LLONG:
253 value = va_arg(args, uint64_t);
254 break;
255 case DP_C_SIZE:
256 value = va_arg(args, size_t);
257 break;
258 default:
259 value = va_arg(args, unsigned int);
260 break;
261 }
262 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
263 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
264 min, max, flags))
265 return 0;
266 break;
267#ifndef OPENSSL_SYS_UEFI
268 case 'f':
269 if (cflags == DP_C_LDOUBLE)
270 fvalue = va_arg(args, LDOUBLE);
271 else
272 fvalue = va_arg(args, double);
273 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
274 flags, F_FORMAT))
275 return 0;
276 break;
277 case 'E':
278 flags |= DP_F_UP;
279 /* fall thru */
280 case 'e':
281 if (cflags == DP_C_LDOUBLE)
282 fvalue = va_arg(args, LDOUBLE);
283 else
284 fvalue = va_arg(args, double);
285 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
286 flags, E_FORMAT))
287 return 0;
288 break;
289 case 'G':
290 flags |= DP_F_UP;
291 /* fall thru */
292 case 'g':
293 if (cflags == DP_C_LDOUBLE)
294 fvalue = va_arg(args, LDOUBLE);
295 else
296 fvalue = va_arg(args, double);
297 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
298 flags, G_FORMAT))
299 return 0;
300 break;
301#else
302 case 'f':
303 case 'E':
304 case 'e':
305 case 'G':
306 case 'g':
307 /* not implemented for UEFI */
308 return 0;
309#endif
310 case 'c':
311 if (!doapr_outch(sbuffer, buffer, &currlen, maxlen,
312 va_arg(args, int)))
313 return 0;
314 break;
315 case 's':
316 strvalue = va_arg(args, char *);
317 if (max < 0) {
318 if (buffer)
319 max = INT_MAX;
320 else
321 max = *maxlen;
322 }
323 if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
324 flags, min, max))
325 return 0;
326 break;
327 case 'p':
328 value = (size_t)va_arg(args, void *);
329 if (!fmtint(sbuffer, buffer, &currlen, maxlen,
330 value, 16, min, max, flags | DP_F_NUM))
331 return 0;
332 break;
333 case 'n':
334 {
335 int *num;
336 num = va_arg(args, int *);
337 *num = currlen;
338 }
339 break;
340 case '%':
341 if (!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
342 return 0;
343 break;
344 case 'w':
345 /* not supported yet, treat as next char */
346 ch = *format++;
347 break;
348 default:
349 /* unknown, skip */
350 break;
351 }
352 ch = *format++;
353 state = DP_S_DEFAULT;
354 flags = cflags = min = 0;
355 max = -1;
356 break;
357 case DP_S_DONE:
358 break;
359 default:
360 break;
361 }
362 }
363 /*
364 * We have to truncate if there is no dynamic buffer and we have filled the
365 * static buffer.
366 */
367 if (buffer == NULL) {
368 *truncated = (currlen > *maxlen - 1);
369 if (*truncated)
370 currlen = *maxlen - 1;
371 }
372 if (!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
373 return 0;
374 *retlen = currlen - 1;
375 return 1;
376}
377
378static int
379fmtstr(char **sbuffer,
380 char **buffer,
381 size_t *currlen,
382 size_t *maxlen, const char *value, int flags, int min, int max)
383{
384 int padlen;
385 size_t strln;
386 int cnt = 0;
387
388 if (value == 0)
389 value = "<NULL>";
390
391 strln = OPENSSL_strnlen(value, max < 0 ? SIZE_MAX : (size_t)max);
392
393 padlen = min - strln;
394 if (min < 0 || padlen < 0)
395 padlen = 0;
396 if (max >= 0) {
397 /*
398 * Calculate the maximum output including padding.
399 * Make sure max doesn't overflow into negativity
400 */
401 if (max < INT_MAX - padlen)
402 max += padlen;
403 else
404 max = INT_MAX;
405 }
406 if (flags & DP_F_MINUS)
407 padlen = -padlen;
408
409 while ((padlen > 0) && (max < 0 || cnt < max)) {
410 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
411 return 0;
412 --padlen;
413 ++cnt;
414 }
415 while (strln > 0 && (max < 0 || cnt < max)) {
416 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
417 return 0;
418 --strln;
419 ++cnt;
420 }
421 while ((padlen < 0) && (max < 0 || cnt < max)) {
422 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
423 return 0;
424 ++padlen;
425 ++cnt;
426 }
427 return 1;
428}
429
430static int
431fmtint(char **sbuffer,
432 char **buffer,
433 size_t *currlen,
434 size_t *maxlen, int64_t value, int base, int min, int max, int flags)
435{
436 int signvalue = 0;
437 const char *prefix = "";
438 uint64_t uvalue;
439 char convert[DECIMAL_SIZE(value) + 3];
440 int place = 0;
441 int spadlen = 0;
442 int zpadlen = 0;
443 int caps = 0;
444
445 if (max < 0)
446 max = 0;
447 uvalue = value;
448 if (!(flags & DP_F_UNSIGNED)) {
449 if (value < 0) {
450 signvalue = '-';
451 uvalue = 0 - (uint64_t)value;
452 } else if (flags & DP_F_PLUS)
453 signvalue = '+';
454 else if (flags & DP_F_SPACE)
455 signvalue = ' ';
456 }
457 if (flags & DP_F_NUM) {
458 if (base == 8)
459 prefix = "0";
460 if (base == 16)
461 prefix = "0x";
462 }
463 if (flags & DP_F_UP)
464 caps = 1;
465 do {
466 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
467 [uvalue % (unsigned)base];
468 uvalue = (uvalue / (unsigned)base);
469 } while (uvalue && (place < (int)sizeof(convert)));
470 if (place == sizeof(convert))
471 place--;
472 convert[place] = 0;
473
474 zpadlen = max - place;
475 spadlen =
476 min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
477 if (zpadlen < 0)
478 zpadlen = 0;
479 if (spadlen < 0)
480 spadlen = 0;
481 if (flags & DP_F_ZERO) {
482 zpadlen = OSSL_MAX(zpadlen, spadlen);
483 spadlen = 0;
484 }
485 if (flags & DP_F_MINUS)
486 spadlen = -spadlen;
487
488 /* spaces */
489 while (spadlen > 0) {
490 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
491 return 0;
492 --spadlen;
493 }
494
495 /* sign */
496 if (signvalue)
497 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
498 return 0;
499
500 /* prefix */
501 while (*prefix) {
502 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
503 return 0;
504 prefix++;
505 }
506
507 /* zeros */
508 if (zpadlen > 0) {
509 while (zpadlen > 0) {
510 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
511 return 0;
512 --zpadlen;
513 }
514 }
515 /* digits */
516 while (place > 0) {
517 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
518 return 0;
519 }
520
521 /* left justified spaces */
522 while (spadlen < 0) {
523 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
524 return 0;
525 ++spadlen;
526 }
527 return 1;
528}
529
530#ifndef OPENSSL_SYS_UEFI
531
532static LDOUBLE abs_val(LDOUBLE value)
533{
534 LDOUBLE result = value;
535 if (value < 0)
536 result = -value;
537 return result;
538}
539
540static LDOUBLE pow_10(int in_exp)
541{
542 LDOUBLE result = 1;
543 while (in_exp) {
544 result *= 10;
545 in_exp--;
546 }
547 return result;
548}
549
550static long roundv(LDOUBLE value)
551{
552 long intpart;
553 intpart = (long)value;
554 value = value - intpart;
555 if (value >= 0.5)
556 intpart++;
557 return intpart;
558}
559
560static int
561fmtfp(char **sbuffer,
562 char **buffer,
563 size_t *currlen,
564 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags, int style)
565{
566 int signvalue = 0;
567 LDOUBLE ufvalue;
568 LDOUBLE tmpvalue;
569 char iconvert[20];
570 char fconvert[20];
571 char econvert[20];
572 int iplace = 0;
573 int fplace = 0;
574 int eplace = 0;
575 int padlen = 0;
576 int zpadlen = 0;
577 long exp = 0;
578 unsigned long intpart;
579 unsigned long fracpart;
580 unsigned long max10;
581 int realstyle;
582
583 if (max < 0)
584 max = 6;
585
586 if (fvalue < 0)
587 signvalue = '-';
588 else if (flags & DP_F_PLUS)
589 signvalue = '+';
590 else if (flags & DP_F_SPACE)
591 signvalue = ' ';
592
593 /*
594 * G_FORMAT sometimes prints like E_FORMAT and sometimes like F_FORMAT
595 * depending on the number to be printed. Work out which one it is and use
596 * that from here on.
597 */
598 if (style == G_FORMAT) {
599 if (fvalue == 0.0) {
600 realstyle = F_FORMAT;
601 } else if (fvalue < 0.0001) {
602 realstyle = E_FORMAT;
603 } else if ((max == 0 && fvalue >= 10)
604 || (max > 0 && fvalue >= pow_10(max))) {
605 realstyle = E_FORMAT;
606 } else {
607 realstyle = F_FORMAT;
608 }
609 } else {
610 realstyle = style;
611 }
612
613 if (style != F_FORMAT) {
614 tmpvalue = fvalue;
615 /* Calculate the exponent */
616 if (fvalue != 0.0) {
617 while (tmpvalue < 1) {
618 tmpvalue *= 10;
619 exp--;
620 }
621 while (tmpvalue > 10) {
622 tmpvalue /= 10;
623 exp++;
624 }
625 }
626 if (style == G_FORMAT) {
627 /*
628 * In G_FORMAT the "precision" represents significant digits. We
629 * always have at least 1 significant digit.
630 */
631 if (max == 0)
632 max = 1;
633 /* Now convert significant digits to decimal places */
634 if (realstyle == F_FORMAT) {
635 max -= (exp + 1);
636 if (max < 0) {
637 /*
638 * Should not happen. If we're in F_FORMAT then exp < max?
639 */
640 return 0;
641 }
642 } else {
643 /*
644 * In E_FORMAT there is always one significant digit in front
645 * of the decimal point, so:
646 * significant digits == 1 + decimal places
647 */
648 max--;
649 }
650 }
651 if (realstyle == E_FORMAT)
652 fvalue = tmpvalue;
653 }
654 ufvalue = abs_val(fvalue);
655 /*
656 * By subtracting 65535 (2^16-1) we cancel the low order 15 bits
657 * of ULONG_MAX to avoid using imprecise floating point values.
658 */
659 if (ufvalue >= (double)(ULONG_MAX - 65535) + 65536.0) {
660 /* Number too big */
661 return 0;
662 }
663 intpart = (unsigned long)ufvalue;
664
665 /*
666 * sorry, we only support 9 digits past the decimal because of our
667 * conversion method
668 */
669 if (max > 9)
670 max = 9;
671
672 /*
673 * we "cheat" by converting the fractional part to integer by multiplying
674 * by a factor of 10
675 */
676 max10 = roundv(pow_10(max));
677 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
678
679 if (fracpart >= max10) {
680 intpart++;
681 fracpart -= max10;
682 }
683
684 /* convert integer part */
685 do {
686 iconvert[iplace++] = "0123456789"[intpart % 10];
687 intpart = (intpart / 10);
688 } while (intpart && (iplace < (int)sizeof(iconvert)));
689 if (iplace == sizeof(iconvert))
690 iplace--;
691 iconvert[iplace] = 0;
692
693 /* convert fractional part */
694 while (fplace < max) {
695 if (style == G_FORMAT && fplace == 0 && (fracpart % 10) == 0) {
696 /* We strip trailing zeros in G_FORMAT */
697 max--;
698 fracpart = fracpart / 10;
699 if (fplace < max)
700 continue;
701 break;
702 }
703 fconvert[fplace++] = "0123456789"[fracpart % 10];
704 fracpart = (fracpart / 10);
705 }
706
707 if (fplace == sizeof(fconvert))
708 fplace--;
709 fconvert[fplace] = 0;
710
711 /* convert exponent part */
712 if (realstyle == E_FORMAT) {
713 int tmpexp;
714 if (exp < 0)
715 tmpexp = -exp;
716 else
717 tmpexp = exp;
718
719 do {
720 econvert[eplace++] = "0123456789"[tmpexp % 10];
721 tmpexp = (tmpexp / 10);
722 } while (tmpexp > 0 && eplace < (int)sizeof(econvert));
723 /* Exponent is huge!! Too big to print */
724 if (tmpexp > 0)
725 return 0;
726 /* Add a leading 0 for single digit exponents */
727 if (eplace == 1)
728 econvert[eplace++] = '0';
729 }
730
731 /*
732 * -1 for decimal point (if we have one, i.e. max > 0),
733 * another -1 if we are printing a sign
734 */
735 padlen = min - iplace - max - (max > 0 ? 1 : 0) - ((signvalue) ? 1 : 0);
736 /* Take some off for exponent prefix "+e" and exponent */
737 if (realstyle == E_FORMAT)
738 padlen -= 2 + eplace;
739 zpadlen = max - fplace;
740 if (zpadlen < 0)
741 zpadlen = 0;
742 if (padlen < 0)
743 padlen = 0;
744 if (flags & DP_F_MINUS)
745 padlen = -padlen;
746
747 if ((flags & DP_F_ZERO) && (padlen > 0)) {
748 if (signvalue) {
749 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
750 return 0;
751 --padlen;
752 signvalue = 0;
753 }
754 while (padlen > 0) {
755 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
756 return 0;
757 --padlen;
758 }
759 }
760 while (padlen > 0) {
761 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
762 return 0;
763 --padlen;
764 }
765 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
766 return 0;
767
768 while (iplace > 0) {
769 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
770 return 0;
771 }
772
773 /*
774 * Decimal point. This should probably use locale to find the correct
775 * char to print out.
776 */
777 if (max > 0 || (flags & DP_F_NUM)) {
778 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
779 return 0;
780
781 while (fplace > 0) {
782 if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
783 fconvert[--fplace]))
784 return 0;
785 }
786 }
787 while (zpadlen > 0) {
788 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
789 return 0;
790 --zpadlen;
791 }
792 if (realstyle == E_FORMAT) {
793 char ech;
794
795 if ((flags & DP_F_UP) == 0)
796 ech = 'e';
797 else
798 ech = 'E';
799 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ech))
800 return 0;
801 if (exp < 0) {
802 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '-'))
803 return 0;
804 } else {
805 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '+'))
806 return 0;
807 }
808 while (eplace > 0) {
809 if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
810 econvert[--eplace]))
811 return 0;
812 }
813 }
814
815 while (padlen < 0) {
816 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
817 return 0;
818 ++padlen;
819 }
820 return 1;
821}
822
823#endif /* OPENSSL_SYS_UEFI */
824
825#define BUFFER_INC 1024
826
827static int
828doapr_outch(char **sbuffer,
829 char **buffer, size_t *currlen, size_t *maxlen, int c)
830{
831 /* If we haven't at least one buffer, someone has done a big booboo */
832 if (!ossl_assert(*sbuffer != NULL || buffer != NULL))
833 return 0;
834
835 /* |currlen| must always be <= |*maxlen| */
836 if (!ossl_assert(*currlen <= *maxlen))
837 return 0;
838
839 if (buffer && *currlen == *maxlen) {
840 if (*maxlen > INT_MAX - BUFFER_INC)
841 return 0;
842
843 *maxlen += BUFFER_INC;
844 if (*buffer == NULL) {
845 if ((*buffer = OPENSSL_malloc(*maxlen)) == NULL) {
846 BIOerr(BIO_F_DOAPR_OUTCH, ERR_R_MALLOC_FAILURE);
847 return 0;
848 }
849 if (*currlen > 0) {
850 if (!ossl_assert(*sbuffer != NULL))
851 return 0;
852 memcpy(*buffer, *sbuffer, *currlen);
853 }
854 *sbuffer = NULL;
855 } else {
856 char *tmpbuf;
857 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
858 if (tmpbuf == NULL)
859 return 0;
860 *buffer = tmpbuf;
861 }
862 }
863
864 if (*currlen < *maxlen) {
865 if (*sbuffer)
866 (*sbuffer)[(*currlen)++] = (char)c;
867 else
868 (*buffer)[(*currlen)++] = (char)c;
869 }
870
871 return 1;
872}
873
874/***************************************************************************/
875
876int BIO_printf(BIO *bio, const char *format, ...)
877{
878 va_list args;
879 int ret;
880
881 va_start(args, format);
882
883 ret = BIO_vprintf(bio, format, args);
884
885 va_end(args);
886 return ret;
887}
888
889int BIO_vprintf(BIO *bio, const char *format, va_list args)
890{
891 int ret;
892 size_t retlen;
893 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
894 * in small-stack environments, like threads
895 * or DOS programs. */
896 char *hugebufp = hugebuf;
897 size_t hugebufsize = sizeof(hugebuf);
898 char *dynbuf = NULL;
899 int ignored;
900
901 dynbuf = NULL;
902 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
903 args)) {
904 OPENSSL_free(dynbuf);
905 return -1;
906 }
907 if (dynbuf) {
908 ret = BIO_write(bio, dynbuf, (int)retlen);
909 OPENSSL_free(dynbuf);
910 } else {
911 ret = BIO_write(bio, hugebuf, (int)retlen);
912 }
913 return ret;
914}
915
916/*
917 * As snprintf is not available everywhere, we provide our own
918 * implementation. This function has nothing to do with BIOs, but it's
919 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
920 * function should be renamed, but to what?)
921 */
922int BIO_snprintf(char *buf, size_t n, const char *format, ...)
923{
924 va_list args;
925 int ret;
926
927 va_start(args, format);
928
929 ret = BIO_vsnprintf(buf, n, format, args);
930
931 va_end(args);
932 return ret;
933}
934
935int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
936{
937 size_t retlen;
938 int truncated;
939
940 if (!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
941 return -1;
942
943 if (truncated)
944 /*
945 * In case of truncation, return -1 like traditional snprintf.
946 * (Current drafts for ISO/IEC 9899 say snprintf should return the
947 * number of characters that would have been written, had the buffer
948 * been large enough.)
949 */
950 return -1;
951 else
952 return (retlen <= INT_MAX) ? (int)retlen : -1;
953}