openssl: Move to a module and split thirdparty lib

Same rationale as the previous commits.

1 files changed, 863 insertions, 0 deletions

diff --git a/thirdparty/openssl/crypto/bio/b_print.c b/thirdparty/openssl/crypto/bio/b_print.c
new file mode 100644
index 0000000000..90248fa2aa
--- /dev/null
+++ b/thirdparty/openssl/crypto/bio/b_print.c
@@ -0,0 +1,863 @@
+/* crypto/bio/b_print.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+/* disable assert() unless BIO_DEBUG has been defined */
+#ifndef BIO_DEBUG
+# ifndef NDEBUG
+#  define NDEBUG
+# endif
+#endif
+
+/*
+ * Stolen from tjh's ssl/ssl_trc.c stuff.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <assert.h>
+#include <limits.h>
+#include "cryptlib.h"
+#ifndef NO_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#include <openssl/bn.h>         /* To get BN_LLONG properly defined */
+#include <openssl/bio.h>
+
+#if defined(BN_LLONG) || defined(SIXTY_FOUR_BIT)
+# ifndef HAVE_LONG_LONG
+#  define HAVE_LONG_LONG 1
+# endif
+#endif
+
+/***************************************************************************/
+
+/*
+ * Copyright Patrick Powell 1995
+ * This code is based on code written by Patrick Powell <papowell@astart.com>
+ * It may be used for any purpose as long as this notice remains intact
+ * on all source code distributions.
+ */
+
+/*-
+ * This code contains numerious changes and enhancements which were
+ * made by lots of contributors over the last years to Patrick Powell's
+ * original code:
+ *
+ * o Patrick Powell <papowell@astart.com>      (1995)
+ * o Brandon Long <blong@fiction.net>          (1996, for Mutt)
+ * o Thomas Roessler <roessler@guug.de>        (1998, for Mutt)
+ * o Michael Elkins <me@cs.hmc.edu>            (1998, for Mutt)
+ * o Andrew Tridgell <tridge@samba.org>        (1998, for Samba)
+ * o Luke Mewburn <lukem@netbsd.org>           (1999, for LukemFTP)
+ * o Ralf S. Engelschall <rse@engelschall.com> (1999, for Pth)
+ * o ...                                       (for OpenSSL)
+ */
+
+#ifdef HAVE_LONG_DOUBLE
+# define LDOUBLE long double
+#else
+# define LDOUBLE double
+#endif
+
+#ifdef HAVE_LONG_LONG
+# if defined(_WIN32) && !defined(__GNUC__)
+#  define LLONG __int64
+# else
+#  define LLONG long long
+# endif
+#else
+# define LLONG long
+#endif
+
+static int fmtstr(char **, char **, size_t *, size_t *,
+                  const char *, int, int, int);
+static int fmtint(char **, char **, size_t *, size_t *,
+                  LLONG, int, int, int, int);
+static int fmtfp(char **, char **, size_t *, size_t *,
+                 LDOUBLE, int, int, int);
+static int doapr_outch(char **, char **, size_t *, size_t *, int);
+static int _dopr(char **sbuffer, char **buffer,
+                 size_t *maxlen, size_t *retlen, int *truncated,
+                 const char *format, va_list args);
+
+/* format read states */
+#define DP_S_DEFAULT    0
+#define DP_S_FLAGS      1
+#define DP_S_MIN        2
+#define DP_S_DOT        3
+#define DP_S_MAX        4
+#define DP_S_MOD        5
+#define DP_S_CONV       6
+#define DP_S_DONE       7
+
+/* format flags - Bits */
+#define DP_F_MINUS      (1 << 0)
+#define DP_F_PLUS       (1 << 1)
+#define DP_F_SPACE      (1 << 2)
+#define DP_F_NUM        (1 << 3)
+#define DP_F_ZERO       (1 << 4)
+#define DP_F_UP         (1 << 5)
+#define DP_F_UNSIGNED   (1 << 6)
+
+/* conversion flags */
+#define DP_C_SHORT      1
+#define DP_C_LONG       2
+#define DP_C_LDOUBLE    3
+#define DP_C_LLONG      4
+
+/* some handy macros */
+#define char_to_int(p) (p - '0')
+#define OSSL_MAX(p,q) ((p >= q) ? p : q)
+
+static int
+_dopr(char **sbuffer,
+      char **buffer,
+      size_t *maxlen,
+      size_t *retlen, int *truncated, const char *format, va_list args)
+{
+    char ch;
+    LLONG value;
+    LDOUBLE fvalue;
+    char *strvalue;
+    int min;
+    int max;
+    int state;
+    int flags;
+    int cflags;
+    size_t currlen;
+
+    state = DP_S_DEFAULT;
+    flags = currlen = cflags = min = 0;
+    max = -1;
+    ch = *format++;
+
+    while (state != DP_S_DONE) {
+        if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
+            state = DP_S_DONE;
+
+        switch (state) {
+        case DP_S_DEFAULT:
+            if (ch == '%')
+                state = DP_S_FLAGS;
+            else
+                if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
+                    return 0;
+            ch = *format++;
+            break;
+        case DP_S_FLAGS:
+            switch (ch) {
+            case '-':
+                flags |= DP_F_MINUS;
+                ch = *format++;
+                break;
+            case '+':
+                flags |= DP_F_PLUS;
+                ch = *format++;
+                break;
+            case ' ':
+                flags |= DP_F_SPACE;
+                ch = *format++;
+                break;
+            case '#':
+                flags |= DP_F_NUM;
+                ch = *format++;
+                break;
+            case '0':
+                flags |= DP_F_ZERO;
+                ch = *format++;
+                break;
+            default:
+                state = DP_S_MIN;
+                break;
+            }
+            break;
+        case DP_S_MIN:
+            if (isdigit((unsigned char)ch)) {
+                min = 10 * min + char_to_int(ch);
+                ch = *format++;
+            } else if (ch == '*') {
+                min = va_arg(args, int);
+                ch = *format++;
+                state = DP_S_DOT;
+            } else
+                state = DP_S_DOT;
+            break;
+        case DP_S_DOT:
+            if (ch == '.') {
+                state = DP_S_MAX;
+                ch = *format++;
+            } else
+                state = DP_S_MOD;
+            break;
+        case DP_S_MAX:
+            if (isdigit((unsigned char)ch)) {
+                if (max < 0)
+                    max = 0;
+                max = 10 * max + char_to_int(ch);
+                ch = *format++;
+            } else if (ch == '*') {
+                max = va_arg(args, int);
+                ch = *format++;
+                state = DP_S_MOD;
+            } else
+                state = DP_S_MOD;
+            break;
+        case DP_S_MOD:
+            switch (ch) {
+            case 'h':
+                cflags = DP_C_SHORT;
+                ch = *format++;
+                break;
+            case 'l':
+                if (*format == 'l') {
+                    cflags = DP_C_LLONG;
+                    format++;
+                } else
+                    cflags = DP_C_LONG;
+                ch = *format++;
+                break;
+            case 'q':
+                cflags = DP_C_LLONG;
+                ch = *format++;
+                break;
+            case 'L':
+                cflags = DP_C_LDOUBLE;
+                ch = *format++;
+                break;
+            default:
+                break;
+            }
+            state = DP_S_CONV;
+            break;
+        case DP_S_CONV:
+            switch (ch) {
+            case 'd':
+            case 'i':
+                switch (cflags) {
+                case DP_C_SHORT:
+                    value = (short int)va_arg(args, int);
+                    break;
+                case DP_C_LONG:
+                    value = va_arg(args, long int);
+                    break;
+                case DP_C_LLONG:
+                    value = va_arg(args, LLONG);
+                    break;
+                default:
+                    value = va_arg(args, int);
+                    break;
+                }
+                if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
+                            max, flags))
+                    return 0;
+                break;
+            case 'X':
+                flags |= DP_F_UP;
+                /* FALLTHROUGH */
+            case 'x':
+            case 'o':
+            case 'u':
+                flags |= DP_F_UNSIGNED;
+                switch (cflags) {
+                case DP_C_SHORT:
+                    value = (unsigned short int)va_arg(args, unsigned int);
+                    break;
+                case DP_C_LONG:
+                    value = (LLONG) va_arg(args, unsigned long int);
+                    break;
+                case DP_C_LLONG:
+                    value = va_arg(args, unsigned LLONG);
+                    break;
+                default:
+                    value = (LLONG) va_arg(args, unsigned int);
+                    break;
+                }
+                if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
+                            ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
+                            min, max, flags))
+                    return 0;
+                break;
+            case 'f':
+                if (cflags == DP_C_LDOUBLE)
+                    fvalue = va_arg(args, LDOUBLE);
+                else
+                    fvalue = va_arg(args, double);
+                if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
+                           flags))
+                    return 0;
+                break;
+            case 'E':
+                flags |= DP_F_UP;
+            case 'e':
+                if (cflags == DP_C_LDOUBLE)
+                    fvalue = va_arg(args, LDOUBLE);
+                else
+                    fvalue = va_arg(args, double);
+                break;
+            case 'G':
+                flags |= DP_F_UP;
+            case 'g':
+                if (cflags == DP_C_LDOUBLE)
+                    fvalue = va_arg(args, LDOUBLE);
+                else
+                    fvalue = va_arg(args, double);
+                break;
+            case 'c':
+                if(!doapr_outch(sbuffer, buffer, &currlen, maxlen,
+                            va_arg(args, int)))
+                    return 0;
+                break;
+            case 's':
+                strvalue = va_arg(args, char *);
+                if (max < 0) {
+                    if (buffer)
+                        max = INT_MAX;
+                    else
+                        max = *maxlen;
+                }
+                if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
+                            flags, min, max))
+                    return 0;
+                break;
+            case 'p':
+                value = (long)va_arg(args, void *);
+                if (!fmtint(sbuffer, buffer, &currlen, maxlen,
+                            value, 16, min, max, flags | DP_F_NUM))
+                    return 0;
+                break;
+            case 'n':          /* XXX */
+                if (cflags == DP_C_SHORT) {
+                    short int *num;
+                    num = va_arg(args, short int *);
+                    *num = currlen;
+                } else if (cflags == DP_C_LONG) { /* XXX */
+                    long int *num;
+                    num = va_arg(args, long int *);
+                    *num = (long int)currlen;
+                } else if (cflags == DP_C_LLONG) { /* XXX */
+                    LLONG *num;
+                    num = va_arg(args, LLONG *);
+                    *num = (LLONG) currlen;
+                } else {
+                    int *num;
+                    num = va_arg(args, int *);
+                    *num = currlen;
+                }
+                break;
+            case '%':
+                if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
+                    return 0;
+                break;
+            case 'w':
+                /* not supported yet, treat as next char */
+                ch = *format++;
+                break;
+            default:
+                /* unknown, skip */
+                break;
+            }
+            ch = *format++;
+            state = DP_S_DEFAULT;
+            flags = cflags = min = 0;
+            max = -1;
+            break;
+        case DP_S_DONE:
+            break;
+        default:
+            break;
+        }
+    }
+    *truncated = (currlen > *maxlen - 1);
+    if (*truncated)
+        currlen = *maxlen - 1;
+    if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
+        return 0;
+    *retlen = currlen - 1;
+    return 1;
+}
+
+static int
+fmtstr(char **sbuffer,
+       char **buffer,
+       size_t *currlen,
+       size_t *maxlen, const char *value, int flags, int min, int max)
+{
+    int padlen;
+    size_t strln;
+    int cnt = 0;
+
+    if (value == 0)
+        value = "<NULL>";
+
+    strln = strlen(value);
+    if (strln > INT_MAX)
+        strln = INT_MAX;
+
+    padlen = min - strln;
+    if (min < 0 || padlen < 0)
+        padlen = 0;
+    if (flags & DP_F_MINUS)
+        padlen = -padlen;
+
+    while ((padlen > 0) && (cnt < max)) {
+        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
+            return 0;
+        --padlen;
+        ++cnt;
+    }
+    while (*value && (cnt < max)) {
+        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
+            return 0;
+        ++cnt;
+    }
+    while ((padlen < 0) && (cnt < max)) {
+        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
+            return 0;
+        ++padlen;
+        ++cnt;
+    }
+    return 1;
+}
+
+static int
+fmtint(char **sbuffer,
+       char **buffer,
+       size_t *currlen,
+       size_t *maxlen, LLONG value, int base, int min, int max, int flags)
+{
+    int signvalue = 0;
+    const char *prefix = "";
+    unsigned LLONG uvalue;
+    char convert[DECIMAL_SIZE(value) + 3];
+    int place = 0;
+    int spadlen = 0;
+    int zpadlen = 0;
+    int caps = 0;
+
+    if (max < 0)
+        max = 0;
+    uvalue = value;
+    if (!(flags & DP_F_UNSIGNED)) {
+        if (value < 0) {
+            signvalue = '-';
+            uvalue = -value;
+        } else if (flags & DP_F_PLUS)
+            signvalue = '+';
+        else if (flags & DP_F_SPACE)
+            signvalue = ' ';
+    }
+    if (flags & DP_F_NUM) {
+        if (base == 8)
+            prefix = "0";
+        if (base == 16)
+            prefix = "0x";
+    }
+    if (flags & DP_F_UP)
+        caps = 1;
+    do {
+        convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
+            [uvalue % (unsigned)base];
+        uvalue = (uvalue / (unsigned)base);
+    } while (uvalue && (place < (int)sizeof(convert)));
+    if (place == sizeof(convert))
+        place--;
+    convert[place] = 0;
+
+    zpadlen = max - place;
+    spadlen =
+        min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
+    if (zpadlen < 0)
+        zpadlen = 0;
+    if (spadlen < 0)
+        spadlen = 0;
+    if (flags & DP_F_ZERO) {
+        zpadlen = OSSL_MAX(zpadlen, spadlen);
+        spadlen = 0;
+    }
+    if (flags & DP_F_MINUS)
+        spadlen = -spadlen;
+
+    /* spaces */
+    while (spadlen > 0) {
+        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
+            return 0;
+        --spadlen;
+    }
+
+    /* sign */
+    if (signvalue)
+        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
+            return 0;
+
+    /* prefix */
+    while (*prefix) {
+        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
+            return 0;
+        prefix++;
+    }
+
+    /* zeros */
+    if (zpadlen > 0) {
+        while (zpadlen > 0) {
+            if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
+                return 0;
+            --zpadlen;
+        }
+    }
+    /* digits */
+    while (place > 0) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
+            return 0;
+    }
+
+    /* left justified spaces */
+    while (spadlen < 0) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
+            return 0;
+        ++spadlen;
+    }
+    return 1;
+}
+
+static LDOUBLE abs_val(LDOUBLE value)
+{
+    LDOUBLE result = value;
+    if (value < 0)
+        result = -value;
+    return result;
+}
+
+static LDOUBLE pow_10(int in_exp)
+{
+    LDOUBLE result = 1;
+    while (in_exp) {
+        result *= 10;
+        in_exp--;
+    }
+    return result;
+}
+
+static long roundv(LDOUBLE value)
+{
+    long intpart;
+    intpart = (long)value;
+    value = value - intpart;
+    if (value >= 0.5)
+        intpart++;
+    return intpart;
+}
+
+static int
+fmtfp(char **sbuffer,
+      char **buffer,
+      size_t *currlen,
+      size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags)
+{
+    int signvalue = 0;
+    LDOUBLE ufvalue;
+    char iconvert[20];
+    char fconvert[20];
+    int iplace = 0;
+    int fplace = 0;
+    int padlen = 0;
+    int zpadlen = 0;
+    long intpart;
+    long fracpart;
+    long max10;
+
+    if (max < 0)
+        max = 6;
+    ufvalue = abs_val(fvalue);
+    if (fvalue < 0)
+        signvalue = '-';
+    else if (flags & DP_F_PLUS)
+        signvalue = '+';
+    else if (flags & DP_F_SPACE)
+        signvalue = ' ';
+
+    intpart = (long)ufvalue;
+
+    /*
+     * sorry, we only support 9 digits past the decimal because of our
+     * conversion method
+     */
+    if (max > 9)
+        max = 9;
+
+    /*
+     * we "cheat" by converting the fractional part to integer by multiplying
+     * by a factor of 10
+     */
+    max10 = roundv(pow_10(max));
+    fracpart = roundv(pow_10(max) * (ufvalue - intpart));
+
+    if (fracpart >= max10) {
+        intpart++;
+        fracpart -= max10;
+    }
+
+    /* convert integer part */
+    do {
+        iconvert[iplace++] = "0123456789"[intpart % 10];
+        intpart = (intpart / 10);
+    } while (intpart && (iplace < (int)sizeof(iconvert)));
+    if (iplace == sizeof iconvert)
+        iplace--;
+    iconvert[iplace] = 0;
+
+    /* convert fractional part */
+    do {
+        fconvert[fplace++] = "0123456789"[fracpart % 10];
+        fracpart = (fracpart / 10);
+    } while (fplace < max);
+    if (fplace == sizeof fconvert)
+        fplace--;
+    fconvert[fplace] = 0;
+
+    /* -1 for decimal point, another -1 if we are printing a sign */
+    padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
+    zpadlen = max - fplace;
+    if (zpadlen < 0)
+        zpadlen = 0;
+    if (padlen < 0)
+        padlen = 0;
+    if (flags & DP_F_MINUS)
+        padlen = -padlen;
+
+    if ((flags & DP_F_ZERO) && (padlen > 0)) {
+        if (signvalue) {
+            if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
+                return 0;
+            --padlen;
+            signvalue = 0;
+        }
+        while (padlen > 0) {
+            if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
+                return 0;
+            --padlen;
+        }
+    }
+    while (padlen > 0) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
+            return 0;
+        --padlen;
+    }
+    if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
+        return 0;
+
+    while (iplace > 0) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
+            return 0;
+    }
+
+    /*
+     * Decimal point. This should probably use locale to find the correct
+     * char to print out.
+     */
+    if (max > 0 || (flags & DP_F_NUM)) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
+            return 0;
+
+        while (fplace > 0) {
+            if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
+                            fconvert[--fplace]))
+                return 0;
+        }
+    }
+    while (zpadlen > 0) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
+            return 0;
+        --zpadlen;
+    }
+
+    while (padlen < 0) {
+        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
+            return 0;
+        ++padlen;
+    }
+    return 1;
+}
+
+#define BUFFER_INC  1024
+
+static int
+doapr_outch(char **sbuffer,
+            char **buffer, size_t *currlen, size_t *maxlen, int c)
+{
+    /* If we haven't at least one buffer, someone has doe a big booboo */
+    assert(*sbuffer != NULL || buffer != NULL);
+
+    /* |currlen| must always be <= |*maxlen| */
+    assert(*currlen <= *maxlen);
+
+    if (buffer && *currlen == *maxlen) {
+        if (*maxlen > INT_MAX - BUFFER_INC)
+            return 0;
+
+        *maxlen += BUFFER_INC;
+        if (*buffer == NULL) {
+            *buffer = OPENSSL_malloc(*maxlen);
+            if (*buffer == NULL)
+                return 0;
+            if (*currlen > 0) {
+                assert(*sbuffer != NULL);
+                memcpy(*buffer, *sbuffer, *currlen);
+            }
+            *sbuffer = NULL;
+        } else {
+            char *tmpbuf;
+            tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
+            if (tmpbuf == NULL)
+                return 0;
+            *buffer = tmpbuf;
+        }
+    }
+
+    if (*currlen < *maxlen) {
+        if (*sbuffer)
+            (*sbuffer)[(*currlen)++] = (char)c;
+        else
+            (*buffer)[(*currlen)++] = (char)c;
+    }
+
+    return 1;
+}
+
+/***************************************************************************/
+
+int BIO_printf(BIO *bio, const char *format, ...)
+{
+    va_list args;
+    int ret;
+
+    va_start(args, format);
+
+    ret = BIO_vprintf(bio, format, args);
+
+    va_end(args);
+    return (ret);
+}
+
+int BIO_vprintf(BIO *bio, const char *format, va_list args)
+{
+    int ret;
+    size_t retlen;
+    char hugebuf[1024 * 2];     /* Was previously 10k, which is unreasonable
+                                 * in small-stack environments, like threads
+                                 * or DOS programs. */
+    char *hugebufp = hugebuf;
+    size_t hugebufsize = sizeof(hugebuf);
+    char *dynbuf = NULL;
+    int ignored;
+
+    dynbuf = NULL;
+    CRYPTO_push_info("doapr()");
+    if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
+                args)) {
+        OPENSSL_free(dynbuf);
+        return -1;
+    }
+    if (dynbuf) {
+        ret = BIO_write(bio, dynbuf, (int)retlen);
+        OPENSSL_free(dynbuf);
+    } else {
+        ret = BIO_write(bio, hugebuf, (int)retlen);
+    }
+    CRYPTO_pop_info();
+    return (ret);
+}
+
+/*
+ * As snprintf is not available everywhere, we provide our own
+ * implementation. This function has nothing to do with BIOs, but it's
+ * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
+ * function should be renamed, but to what?)
+ */
+int BIO_snprintf(char *buf, size_t n, const char *format, ...)
+{
+    va_list args;
+    int ret;
+
+    va_start(args, format);
+
+    ret = BIO_vsnprintf(buf, n, format, args);
+
+    va_end(args);
+    return (ret);
+}
+
+int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
+{
+    size_t retlen;
+    int truncated;
+
+    if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
+        return -1;
+
+    if (truncated)
+        /*
+         * In case of truncation, return -1 like traditional snprintf.
+         * (Current drafts for ISO/IEC 9899 say snprintf should return the
+         * number of characters that would have been written, had the buffer
+         * been large enough.)
+         */
+        return -1;
+    else
+        return (retlen <= INT_MAX) ? (int)retlen : -1;
+}