-/* crypto/bn/bn_print.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2017 The OpenSSL Project Authors. 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.]
+ * Licensed under the OpenSSL license (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 <ctype.h>
-#include "cryptlib.h"
+#include "internal/ctype.h"
+#include <limits.h>
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include "bn_lcl.h"
char *buf;
char *p;
- buf = (char *)OPENSSL_malloc(a->top * BN_BYTES * 2 + 2);
+ if (BN_is_zero(a))
+ return OPENSSL_strdup("0");
+ buf = OPENSSL_malloc(a->top * BN_BYTES * 2 + 2);
if (buf == NULL) {
BNerr(BN_F_BN_BN2HEX, ERR_R_MALLOC_FAILURE);
goto err;
}
p = buf;
if (a->neg)
- *(p++) = '-';
- if (BN_is_zero(a))
- *(p++) = '0';
+ *p++ = '-';
for (i = a->top - 1; i >= 0; i--) {
for (j = BN_BITS2 - 8; j >= 0; j -= 8) {
/* strip leading zeros */
- v = ((int)(a->d[i] >> (long)j)) & 0xff;
- if (z || (v != 0)) {
- *(p++) = Hex[v >> 4];
- *(p++) = Hex[v & 0x0f];
+ v = (int)((a->d[i] >> j) & 0xff);
+ if (z || v != 0) {
+ *p++ = Hex[v >> 4];
+ *p++ = Hex[v & 0x0f];
z = 1;
}
}
}
*p = '\0';
err:
- return (buf);
+ return buf;
}
/* Must 'OPENSSL_free' the returned data */
char *BN_bn2dec(const BIGNUM *a)
{
- int i = 0, num, ok = 0;
+ int i = 0, num, ok = 0, n, tbytes;
char *buf = NULL;
char *p;
BIGNUM *t = NULL;
BN_ULONG *bn_data = NULL, *lp;
+ int bn_data_num;
/*-
* get an upper bound for the length of the decimal integer
* num <= (BN_num_bits(a) + 1) * log(2)
- * <= 3 * BN_num_bits(a) * 0.1001 + log(2) + 1 (rounding error)
- * <= BN_num_bits(a)/10 + BN_num_bits/1000 + 1 + 1
+ * <= 3 * BN_num_bits(a) * 0.101 + log(2) + 1 (rounding error)
+ * <= 3 * BN_num_bits(a) / 10 + 3 * BN_num_bits / 1000 + 1 + 1
*/
i = BN_num_bits(a) * 3;
num = (i / 10 + i / 1000 + 1) + 1;
- bn_data =
- (BN_ULONG *)OPENSSL_malloc((num / BN_DEC_NUM + 1) * sizeof(BN_ULONG));
- buf = (char *)OPENSSL_malloc(num + 3);
- if ((buf == NULL) || (bn_data == NULL)) {
+ tbytes = num + 3; /* negative and terminator and one spare? */
+ bn_data_num = num / BN_DEC_NUM + 1;
+ bn_data = OPENSSL_malloc(bn_data_num * sizeof(BN_ULONG));
+ buf = OPENSSL_malloc(tbytes);
+ if (buf == NULL || bn_data == NULL) {
BNerr(BN_F_BN_BN2DEC, ERR_R_MALLOC_FAILURE);
goto err;
}
if ((t = BN_dup(a)) == NULL)
goto err;
-#define BUF_REMAIN (num+3 - (size_t)(p - buf))
p = buf;
lp = bn_data;
if (BN_is_zero(t)) {
- *(p++) = '0';
- *(p++) = '\0';
+ *p++ = '0';
+ *p++ = '\0';
} else {
if (BN_is_negative(t))
*p++ = '-';
- i = 0;
while (!BN_is_zero(t)) {
+ if (lp - bn_data >= bn_data_num)
+ goto err;
*lp = BN_div_word(t, BN_DEC_CONV);
+ if (*lp == (BN_ULONG)-1)
+ goto err;
lp++;
}
lp--;
* the last one needs truncation. The blocks need to be reversed in
* order.
*/
- BIO_snprintf(p, BUF_REMAIN, BN_DEC_FMT1, *lp);
- while (*p)
- p++;
+ n = BIO_snprintf(p, tbytes - (size_t)(p - buf), BN_DEC_FMT1, *lp);
+ if (n < 0)
+ goto err;
+ p += n;
while (lp != bn_data) {
lp--;
- BIO_snprintf(p, BUF_REMAIN, BN_DEC_FMT2, *lp);
- while (*p)
- p++;
+ n = BIO_snprintf(p, tbytes - (size_t)(p - buf), BN_DEC_FMT2, *lp);
+ if (n < 0)
+ goto err;
+ p += n;
}
}
ok = 1;
err:
- if (bn_data != NULL)
- OPENSSL_free(bn_data);
- if (t != NULL)
- BN_free(t);
- if (!ok && buf) {
- OPENSSL_free(buf);
- buf = NULL;
- }
-
- return (buf);
+ OPENSSL_free(bn_data);
+ BN_free(t);
+ if (ok)
+ return buf;
+ OPENSSL_free(buf);
+ return NULL;
}
int BN_hex2bn(BIGNUM **bn, const char *a)
int neg = 0, h, m, i, j, k, c;
int num;
- if ((a == NULL) || (*a == '\0'))
- return (0);
+ if (a == NULL || *a == '\0')
+ return 0;
if (*a == '-') {
neg = 1;
a++;
}
- for (i = 0; isxdigit((unsigned char)a[i]); i++) ;
+ for (i = 0; i <= INT_MAX / 4 && ossl_isxdigit(a[i]); i++)
+ continue;
+
+ if (i == 0 || i > INT_MAX / 4)
+ goto err;
num = i + neg;
if (bn == NULL)
- return (num);
+ return num;
/* a is the start of the hex digits, and it is 'i' long */
if (*bn == NULL) {
if ((ret = BN_new()) == NULL)
- return (0);
+ return 0;
} else {
ret = *bn;
BN_zero(ret);
}
- /* i is the number of hex digests; */
+ /* i is the number of hex digits */
if (bn_expand(ret, i * 4) == NULL)
goto err;
m = 0;
h = 0;
while (j > 0) {
- m = ((BN_BYTES * 2) <= j) ? (BN_BYTES * 2) : j;
+ m = (BN_BYTES * 2 <= j) ? BN_BYTES * 2 : j;
l = 0;
for (;;) {
c = a[j - m];
- if ((c >= '0') && (c <= '9'))
- k = c - '0';
- else if ((c >= 'a') && (c <= 'f'))
- k = c - 'a' + 10;
- else if ((c >= 'A') && (c <= 'F'))
- k = c - 'A' + 10;
- else
+ k = OPENSSL_hexchar2int(c);
+ if (k < 0)
k = 0; /* paranoia */
l = (l << 4) | k;
break;
}
}
- j -= (BN_BYTES * 2);
+ j -= BN_BYTES * 2;
}
ret->top = h;
bn_correct_top(ret);
- ret->neg = neg;
*bn = ret;
bn_check_top(ret);
- return (num);
+ /* Don't set the negative flag if it's zero. */
+ if (ret->top != 0)
+ ret->neg = neg;
+ return num;
err:
if (*bn == NULL)
BN_free(ret);
- return (0);
+ return 0;
}
int BN_dec2bn(BIGNUM **bn, const char *a)
int neg = 0, i, j;
int num;
- if ((a == NULL) || (*a == '\0'))
- return (0);
+ if (a == NULL || *a == '\0')
+ return 0;
if (*a == '-') {
neg = 1;
a++;
}
- for (i = 0; isdigit((unsigned char)a[i]); i++) ;
+ for (i = 0; i <= INT_MAX / 4 && ossl_isdigit(a[i]); i++)
+ continue;
+
+ if (i == 0 || i > INT_MAX / 4)
+ goto err;
num = i + neg;
if (bn == NULL)
- return (num);
+ return num;
/*
* a is the start of the digits, and it is 'i' long. We chop it into
*/
if (*bn == NULL) {
if ((ret = BN_new()) == NULL)
- return (0);
+ return 0;
} else {
ret = *bn;
BN_zero(ret);
}
- /* i is the number of digests, a bit of an over expand; */
+ /* i is the number of digits, a bit of an over expand */
if (bn_expand(ret, i * 4) == NULL)
goto err;
- j = BN_DEC_NUM - (i % BN_DEC_NUM);
+ j = BN_DEC_NUM - i % BN_DEC_NUM;
if (j == BN_DEC_NUM)
j = 0;
l = 0;
- while (*a) {
+ while (--i >= 0) {
l *= 10;
l += *a - '0';
a++;
if (++j == BN_DEC_NUM) {
- BN_mul_word(ret, BN_DEC_CONV);
- BN_add_word(ret, l);
+ if (!BN_mul_word(ret, BN_DEC_CONV)
+ || !BN_add_word(ret, l))
+ goto err;
l = 0;
j = 0;
}
}
- ret->neg = neg;
bn_correct_top(ret);
*bn = ret;
bn_check_top(ret);
- return (num);
+ /* Don't set the negative flag if it's zero. */
+ if (ret->top != 0)
+ ret->neg = neg;
+ return num;
err:
if (*bn == NULL)
BN_free(ret);
- return (0);
+ return 0;
}
int BN_asc2bn(BIGNUM **bn, const char *a)
{
const char *p = a;
+
if (*p == '-')
p++;
if (!BN_dec2bn(bn, p))
return 0;
}
- if (*a == '-')
+ /* Don't set the negative flag if it's zero. */
+ if (*a == '-' && (*bn)->top != 0)
(*bn)->neg = 1;
return 1;
}
-#ifndef OPENSSL_NO_BIO
# ifndef OPENSSL_NO_STDIO
int BN_print_fp(FILE *fp, const BIGNUM *a)
{
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL)
- return (0);
+ return 0;
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = BN_print(b, a);
BIO_free(b);
- return (ret);
+ return ret;
}
# endif
int i, j, v, z = 0;
int ret = 0;
- if ((a->neg) && (BIO_write(bp, "-", 1) != 1))
+ if ((a->neg) && BIO_write(bp, "-", 1) != 1)
goto end;
- if (BN_is_zero(a) && (BIO_write(bp, "0", 1) != 1))
+ if (BN_is_zero(a) && BIO_write(bp, "0", 1) != 1)
goto end;
for (i = a->top - 1; i >= 0; i--) {
for (j = BN_BITS2 - 4; j >= 0; j -= 4) {
/* strip leading zeros */
- v = ((int)(a->d[i] >> (long)j)) & 0x0f;
- if (z || (v != 0)) {
- if (BIO_write(bp, &(Hex[v]), 1) != 1)
+ v = (int)((a->d[i] >> j) & 0xff);
+ if (z || v != 0) {
+ if (BIO_write(bp, &Hex[v], 1) != 1)
goto end;
z = 1;
}
}
ret = 1;
end:
- return (ret);
+ return ret;
}
-#endif
char *BN_options(void)
{
if (!init) {
init++;
#ifdef BN_LLONG
- BIO_snprintf(data, sizeof data, "bn(%d,%d)",
- (int)sizeof(BN_ULLONG) * 8, (int)sizeof(BN_ULONG) * 8);
+ BIO_snprintf(data, sizeof(data), "bn(%zu,%zu)",
+ sizeof(BN_ULLONG) * 8, sizeof(BN_ULONG) * 8);
#else
- BIO_snprintf(data, sizeof data, "bn(%d,%d)",
- (int)sizeof(BN_ULONG) * 8, (int)sizeof(BN_ULONG) * 8);
+ BIO_snprintf(data, sizeof(data), "bn(%zu,%zu)",
+ sizeof(BN_ULONG) * 8, sizeof(BN_ULONG) * 8);
#endif
}
- return (data);
+ return data;
}
projects / openssl.git / blobdiff