release/src/router/openssl/crypto/bio/b_print.c

   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 #ifdef HAVE_LONG_LONG
 119 # if defined(_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
 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
 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
 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
 578 static LDOUBLE abs_val(LDOUBLE value)
 579 {
 580     LDOUBLE result = value;
 581     if (value < 0)
 582         result = -value;
 583     return result;
 584 }
 585
 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
 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
 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     long intpart;
 621     long fracpart;
 622     long max10;
 623
 624     if (max < 0)
 625         max = 6;
 626     ufvalue = abs_val(fvalue);
 627     if (fvalue < 0)
 628         signvalue = '-';
 629     else if (flags & DP_F_PLUS)
 630         signvalue = '+';
 631     else if (flags & DP_F_SPACE)
 632         signvalue = ' ';
 633
 634     intpart = (long)ufvalue;
 635
 636     /*
 637      * sorry, we only support 9 digits past the decimal because of our
 638      * conversion method
 639      */
 640     if (max > 9)
 641         max = 9;
 642
 643     /*
 644      * we "cheat" by converting the fractional part to integer by multiplying
 645      * by a factor of 10
 646      */
 647     max10 = roundv(pow_10(max));
 648     fracpart = roundv(pow_10(max) * (ufvalue - intpart));
 649
 650     if (fracpart >= max10) {
 651         intpart++;
 652         fracpart -= max10;
 653     }
 654
 655     /* convert integer part */
 656     do {
 657         iconvert[iplace++] = "0123456789"[intpart % 10];
 658         intpart = (intpart / 10);
 659     } while (intpart && (iplace < (int)sizeof(iconvert)));
 660     if (iplace == sizeof iconvert)
 661         iplace--;
 662     iconvert[iplace] = 0;
 663
 664     /* convert fractional part */
 665     do {
 666         fconvert[fplace++] = "0123456789"[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             if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
 686                 return 0;
 687             --padlen;
 688             signvalue = 0;
 689         }
 690         while (padlen > 0) {
 691             if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
 692                 return 0;
 693             --padlen;
 694         }
 695     }
 696     while (padlen > 0) {
 697         if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
 698             return 0;
 699         --padlen;
 700     }
 701     if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
 702         return 0;
 703
 704     while (iplace > 0) {
 705         if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
 706             return 0;
 707     }
 708
 709     /*
 710      * Decimal point. This should probably use locale to find the correct
 711      * char to print out.
 712      */
 713     if (max > 0 || (flags & DP_F_NUM)) {
 714         if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
 715             return 0;
 716
 717         while (fplace > 0) {
 718             if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
 719                             fconvert[--fplace]))
 720                 return 0;
 721         }
 722     }
 723     while (zpadlen > 0) {
 724         if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
 725             return 0;
 726         --zpadlen;
 727     }
 728
 729     while (padlen < 0) {
 730         if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
 731             return 0;
 732         ++padlen;
 733     }
 734     return 1;
 735 }
 736
 737 #define BUFFER_INC  1024
 738
 739 static int
 740 doapr_outch(char **sbuffer,
 741             char **buffer, size_t *currlen, size_t *maxlen, int c)
 742 {
 743     /* If we haven't at least one buffer, someone has doe a big booboo */
 744     assert(*sbuffer != NULL || buffer != NULL);
 745
 746     /* |currlen| must always be <= |*maxlen| */
 747     assert(*currlen <= *maxlen);
 748
 749     if (buffer && *currlen == *maxlen) {
 750         if (*maxlen > INT_MAX - BUFFER_INC)
 751             return 0;
 752
 753         *maxlen += BUFFER_INC;
 754         if (*buffer == NULL) {
 755             *buffer = OPENSSL_malloc(*maxlen);
 756             if (*buffer == NULL)
 757                 return 0;
 758             if (*currlen > 0) {
 759                 assert(*sbuffer != NULL);
 760                 memcpy(*buffer, *sbuffer, *currlen);
 761             }
 762             *sbuffer = NULL;
 763         } else {
 764             char *tmpbuf;
 765             tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
 766             if (tmpbuf == NULL)
 767                 return 0;
 768             *buffer = tmpbuf;
 769         }
 770     }
 771
 772     if (*currlen < *maxlen) {
 773         if (*sbuffer)
 774             (*sbuffer)[(*currlen)++] = (char)c;
 775         else
 776             (*buffer)[(*currlen)++] = (char)c;
 777     }
 778
 779     return 1;
 780 }
 781
 782 /***************************************************************************/
 783
 784 int BIO_printf(BIO *bio, const char *format, ...)
 785 {
 786     va_list args;
 787     int ret;
 788
 789     va_start(args, format);
 790
 791     ret = BIO_vprintf(bio, format, args);
 792
 793     va_end(args);
 794     return (ret);
 795 }
 796
 797 int BIO_vprintf(BIO *bio, const char *format, va_list args)
 798 {
 799     int ret;
 800     size_t retlen;
 801     char hugebuf[1024 * 2];     /* Was previously 10k, which is unreasonable
 802                                  * in small-stack environments, like threads
 803                                  * or DOS programs. */
 804     char *hugebufp = hugebuf;
 805     size_t hugebufsize = sizeof(hugebuf);
 806     char *dynbuf = NULL;
 807     int ignored;
 808
 809     dynbuf = NULL;
 810     CRYPTO_push_info("doapr()");
 811     if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
 812                 args)) {
 813         OPENSSL_free(dynbuf);
 814         return -1;
 815     }
 816     if (dynbuf) {
 817         ret = BIO_write(bio, dynbuf, (int)retlen);
 818         OPENSSL_free(dynbuf);
 819     } else {
 820         ret = BIO_write(bio, hugebuf, (int)retlen);
 821     }
 822     CRYPTO_pop_info();
 823     return (ret);
 824 }
 825
 826 /*
 827  * As snprintf is not available everywhere, we provide our own
 828  * implementation. This function has nothing to do with BIOs, but it's
 829  * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
 830  * function should be renamed, but to what?)
 831  */
 832 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
 833 {
 834     va_list args;
 835     int ret;
 836
 837     va_start(args, format);
 838
 839     ret = BIO_vsnprintf(buf, n, format, args);
 840
 841     va_end(args);
 842     return (ret);
 843 }
 844
 845 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
 846 {
 847     size_t retlen;
 848     int truncated;
 849
 850     if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
 851         return -1;
 852
 853     if (truncated)
 854         /*
 855          * In case of truncation, return -1 like traditional snprintf.
 856          * (Current drafts for ISO/IEC 9899 say snprintf should return the
 857          * number of characters that would have been written, had the buffer
 858          * been large enough.)
 859          */
 860         return -1;
 861     else
 862         return (retlen <= INT_MAX) ? (int)retlen : -1;
 863 }