| /* |
| * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "internal/cryptlib.h" |
| #include "crypto/ctype.h" |
| #include "internal/numbers.h" |
| #include <openssl/bio.h> |
| #include <openssl/configuration.h> |
| |
| /* |
| * 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. |
| */ |
| |
| #ifdef HAVE_LONG_DOUBLE |
| # define LDOUBLE long double |
| #else |
| # define LDOUBLE double |
| #endif |
| |
| static int fmtstr(char **, char **, size_t *, size_t *, |
| const char *, int, int, int); |
| static int fmtint(char **, char **, size_t *, size_t *, |
| int64_t, int, int, int, int); |
| #ifndef OPENSSL_SYS_UEFI |
| static int fmtfp(char **, char **, size_t *, size_t *, |
| LDOUBLE, int, int, int, int); |
| #endif |
| 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 */ |
| /* left-aligned padding */ |
| #define DP_F_MINUS (1 << 0) |
| /* print an explicit '+' for a value with positive sign */ |
| #define DP_F_PLUS (1 << 1) |
| /* print an explicit ' ' for a value with positive sign */ |
| #define DP_F_SPACE (1 << 2) |
| /* print 0/0x prefix for octal/hex and decimal point for floating point */ |
| #define DP_F_NUM (1 << 3) |
| /* print leading zeroes */ |
| #define DP_F_ZERO (1 << 4) |
| /* print HEX in UPPPERcase */ |
| #define DP_F_UP (1 << 5) |
| /* treat value as unsigned */ |
| #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 |
| #define DP_C_SIZE 5 |
| |
| /* Floating point formats */ |
| #define F_FORMAT 0 |
| #define E_FORMAT 1 |
| #define G_FORMAT 2 |
| |
| /* 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; |
| int64_t value; |
| #ifndef OPENSSL_SYS_UEFI |
| LDOUBLE fvalue; |
| #endif |
| 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 (ossl_isdigit(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 (ossl_isdigit(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': |
| case 'j': |
| cflags = DP_C_LLONG; |
| ch = *format++; |
| break; |
| case 'L': |
| cflags = DP_C_LDOUBLE; |
| ch = *format++; |
| break; |
| case 'z': |
| cflags = DP_C_SIZE; |
| 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, int64_t); |
| break; |
| case DP_C_SIZE: |
| value = va_arg(args, ossl_ssize_t); |
| 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 = va_arg(args, unsigned long int); |
| break; |
| case DP_C_LLONG: |
| value = va_arg(args, uint64_t); |
| break; |
| case DP_C_SIZE: |
| value = va_arg(args, size_t); |
| break; |
| default: |
| value = 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; |
| #ifndef OPENSSL_SYS_UEFI |
| 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, F_FORMAT)) |
| return 0; |
| break; |
| case 'E': |
| flags |= DP_F_UP; |
| /* fall thru */ |
| case 'e': |
| 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, E_FORMAT)) |
| return 0; |
| break; |
| case 'G': |
| flags |= DP_F_UP; |
| /* fall thru */ |
| case 'g': |
| 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, G_FORMAT)) |
| return 0; |
| break; |
| #else |
| case 'f': |
| case 'E': |
| case 'e': |
| case 'G': |
| case 'g': |
| /* not implemented for UEFI */ |
| ERR_raise(ERR_LIB_BIO, ERR_R_UNSUPPORTED); |
| return 0; |
| #endif |
| 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 = (size_t)va_arg(args, void *); |
| if (!fmtint(sbuffer, buffer, &currlen, maxlen, |
| value, 16, min, max, flags | DP_F_NUM)) |
| return 0; |
| break; |
| case 'n': |
| { |
| 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 */ |
| 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; |
| } |
| } |
| /* |
| * We have to truncate if there is no dynamic buffer and we have filled the |
| * static buffer. |
| */ |
| if (buffer == NULL) { |
| *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 = OPENSSL_strnlen(value, max < 0 ? SIZE_MAX : (size_t)max); |
| |
| padlen = min - strln; |
| if (min < 0 || padlen < 0) |
| padlen = 0; |
| if (max >= 0) { |
| /* |
| * Calculate the maximum output including padding. |
| * Make sure max doesn't overflow into negativity |
| */ |
| if (max < INT_MAX - padlen) |
| max += padlen; |
| else |
| max = INT_MAX; |
| } |
| if (flags & DP_F_MINUS) |
| padlen = -padlen; |
| |
| while ((padlen > 0) && (max < 0 || cnt < max)) { |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' ')) |
| return 0; |
| --padlen; |
| ++cnt; |
| } |
| while (strln > 0 && (max < 0 || cnt < max)) { |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++)) |
| return 0; |
| --strln; |
| ++cnt; |
| } |
| while ((padlen < 0) && (max < 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, int64_t value, int base, int min, int max, int flags) |
| { |
| int signvalue = 0; |
| const char *prefix = ""; |
| uint64_t 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 = 0 - (uint64_t)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; |
| } |
| |
| #ifndef OPENSSL_SYS_UEFI |
| |
| 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 style) |
| { |
| int signvalue = 0; |
| LDOUBLE ufvalue; |
| LDOUBLE tmpvalue; |
| char iconvert[20]; |
| char fconvert[20]; |
| char econvert[20]; |
| int iplace = 0; |
| int fplace = 0; |
| int eplace = 0; |
| int padlen = 0; |
| int zpadlen = 0; |
| long exp = 0; |
| unsigned long intpart; |
| unsigned long fracpart; |
| unsigned long max10; |
| int realstyle; |
| |
| if (max < 0) |
| max = 6; |
| |
| if (fvalue < 0) |
| signvalue = '-'; |
| else if (flags & DP_F_PLUS) |
| signvalue = '+'; |
| else if (flags & DP_F_SPACE) |
| signvalue = ' '; |
| |
| /* |
| * G_FORMAT sometimes prints like E_FORMAT and sometimes like F_FORMAT |
| * depending on the number to be printed. Work out which one it is and use |
| * that from here on. |
| */ |
| if (style == G_FORMAT) { |
| if (fvalue == 0.0) { |
| realstyle = F_FORMAT; |
| } else if (fvalue < 0.0001) { |
| realstyle = E_FORMAT; |
| } else if ((max == 0 && fvalue >= 10) |
| || (max > 0 && fvalue >= pow_10(max))) { |
| realstyle = E_FORMAT; |
| } else { |
| realstyle = F_FORMAT; |
| } |
| } else { |
| realstyle = style; |
| } |
| |
| if (style != F_FORMAT) { |
| tmpvalue = fvalue; |
| /* Calculate the exponent */ |
| if (fvalue != 0.0) { |
| while (tmpvalue < 1) { |
| tmpvalue *= 10; |
| exp--; |
| } |
| while (tmpvalue > 10) { |
| tmpvalue /= 10; |
| exp++; |
| } |
| } |
| if (style == G_FORMAT) { |
| /* |
| * In G_FORMAT the "precision" represents significant digits. We |
| * always have at least 1 significant digit. |
| */ |
| if (max == 0) |
| max = 1; |
| /* Now convert significant digits to decimal places */ |
| if (realstyle == F_FORMAT) { |
| max -= (exp + 1); |
| if (max < 0) { |
| /* |
| * Should not happen. If we're in F_FORMAT then exp < max? |
| */ |
| (void)doapr_outch(sbuffer, buffer, currlen, maxlen, '\0'); |
| return 0; |
| } |
| } else { |
| /* |
| * In E_FORMAT there is always one significant digit in front |
| * of the decimal point, so: |
| * significant digits == 1 + decimal places |
| */ |
| max--; |
| } |
| } |
| if (realstyle == E_FORMAT) |
| fvalue = tmpvalue; |
| } |
| ufvalue = abs_val(fvalue); |
| /* |
| * By subtracting 65535 (2^16-1) we cancel the low order 15 bits |
| * of ULONG_MAX to avoid using imprecise floating point values. |
| */ |
| if (ufvalue >= (double)(ULONG_MAX - 65535) + 65536.0) { |
| /* Number too big */ |
| (void)doapr_outch(sbuffer, buffer, currlen, maxlen, '\0'); |
| return 0; |
| } |
| intpart = (unsigned 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 */ |
| while (fplace < max) { |
| if (style == G_FORMAT && fplace == 0 && (fracpart % 10) == 0) { |
| /* We strip trailing zeros in G_FORMAT */ |
| max--; |
| fracpart = fracpart / 10; |
| if (fplace < max) |
| continue; |
| break; |
| } |
| fconvert[fplace++] = "0123456789"[fracpart % 10]; |
| fracpart = (fracpart / 10); |
| } |
| |
| if (fplace == sizeof(fconvert)) |
| fplace--; |
| fconvert[fplace] = 0; |
| |
| /* convert exponent part */ |
| if (realstyle == E_FORMAT) { |
| int tmpexp; |
| if (exp < 0) |
| tmpexp = -exp; |
| else |
| tmpexp = exp; |
| |
| do { |
| econvert[eplace++] = "0123456789"[tmpexp % 10]; |
| tmpexp = (tmpexp / 10); |
| } while (tmpexp > 0 && eplace < (int)sizeof(econvert)); |
| /* Exponent is huge!! Too big to print */ |
| if (tmpexp > 0) { |
| (void)doapr_outch(sbuffer, buffer, currlen, maxlen, '\0'); |
| return 0; |
| } |
| /* Add a leading 0 for single digit exponents */ |
| if (eplace == 1) |
| econvert[eplace++] = '0'; |
| } |
| |
| /* |
| * -1 for decimal point (if we have one, i.e. max > 0), |
| * another -1 if we are printing a sign |
| */ |
| padlen = min - iplace - max - (max > 0 ? 1 : 0) - ((signvalue) ? 1 : 0); |
| /* Take some off for exponent prefix "+e" and exponent */ |
| if (realstyle == E_FORMAT) |
| padlen -= 2 + eplace; |
| 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; |
| } |
| if (realstyle == E_FORMAT) { |
| char ech; |
| |
| if ((flags & DP_F_UP) == 0) |
| ech = 'e'; |
| else |
| ech = 'E'; |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ech)) |
| return 0; |
| if (exp < 0) { |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '-')) |
| return 0; |
| } else { |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '+')) |
| return 0; |
| } |
| while (eplace > 0) { |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, |
| econvert[--eplace])) |
| return 0; |
| } |
| } |
| |
| while (padlen < 0) { |
| if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' ')) |
| return 0; |
| ++padlen; |
| } |
| return 1; |
| } |
| |
| #endif /* OPENSSL_SYS_UEFI */ |
| |
| #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 done a big booboo */ |
| if (!ossl_assert(*sbuffer != NULL || buffer != NULL)) |
| return 0; |
| |
| /* |currlen| must always be <= |*maxlen| */ |
| if (!ossl_assert(*currlen <= *maxlen)) |
| return 0; |
| |
| if (buffer && *currlen == *maxlen) { |
| if (*maxlen > INT_MAX - BUFFER_INC) |
| return 0; |
| |
| *maxlen += BUFFER_INC; |
| if (*buffer == NULL) { |
| if ((*buffer = OPENSSL_malloc(*maxlen)) == NULL) { |
| ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| if (*currlen > 0) { |
| if (!ossl_assert(*sbuffer != NULL)) |
| return 0; |
| memcpy(*buffer, *sbuffer, *currlen); |
| } |
| *sbuffer = NULL; |
| } else { |
| char *tmpbuf; |
| |
| tmpbuf = OPENSSL_realloc(*buffer, *maxlen); |
| if (tmpbuf == NULL) { |
| ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE); |
| 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; |
| 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); |
| } |
| 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; |
| return (retlen <= INT_MAX) ? (int)retlen : -1; |
| } |
