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Diffstat (limited to 'thirdparty/openssl/crypto/bn/bn_print.c')
-rw-r--r--thirdparty/openssl/crypto/bn/bn_print.c397
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diff --git a/thirdparty/openssl/crypto/bn/bn_print.c b/thirdparty/openssl/crypto/bn/bn_print.c
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+++ b/thirdparty/openssl/crypto/bn/bn_print.c
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+/* crypto/bn/bn_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.]
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <limits.h>
+#include "cryptlib.h"
+#include <openssl/buffer.h>
+#include "bn_lcl.h"
+
+static const char Hex[] = "0123456789ABCDEF";
+
+/* Must 'OPENSSL_free' the returned data */
+char *BN_bn2hex(const BIGNUM *a)
+{
+ int i, j, v, z = 0;
+ char *buf;
+ char *p;
+
+ if (a->neg && BN_is_zero(a)) {
+ /* "-0" == 3 bytes including NULL terminator */
+ buf = OPENSSL_malloc(3);
+ } else {
+ 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';
+ 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];
+ z = 1;
+ }
+ }
+ }
+ *p = '\0';
+ err:
+ return (buf);
+}
+
+/* Must 'OPENSSL_free' the returned data */
+char *BN_bn2dec(const BIGNUM *a)
+{
+ int i = 0, num, ok = 0;
+ char *buf = NULL;
+ char *p;
+ BIGNUM *t = NULL;
+ BN_ULONG *bn_data = NULL, *lp;
+
+ /*-
+ * 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
+ */
+ 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)) {
+ 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';
+ } else {
+ if (BN_is_negative(t))
+ *p++ = '-';
+
+ i = 0;
+ while (!BN_is_zero(t)) {
+ *lp = BN_div_word(t, BN_DEC_CONV);
+ lp++;
+ }
+ lp--;
+ /*
+ * We now have a series of blocks, BN_DEC_NUM chars in length, where
+ * 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++;
+ while (lp != bn_data) {
+ lp--;
+ BIO_snprintf(p, BUF_REMAIN, BN_DEC_FMT2, *lp);
+ while (*p)
+ p++;
+ }
+ }
+ 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);
+}
+
+int BN_hex2bn(BIGNUM **bn, const char *a)
+{
+ BIGNUM *ret = NULL;
+ BN_ULONG l = 0;
+ int neg = 0, h, m, i, j, k, c;
+ int num;
+
+ if ((a == NULL) || (*a == '\0'))
+ return (0);
+
+ if (*a == '-') {
+ neg = 1;
+ a++;
+ }
+
+ for (i = 0; i <= (INT_MAX/4) && isxdigit((unsigned char)a[i]); i++)
+ continue;
+
+ if (i > INT_MAX/4)
+ goto err;
+
+ num = i + neg;
+ if (bn == NULL)
+ 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);
+ } else {
+ ret = *bn;
+ BN_zero(ret);
+ }
+
+ /* i is the number of hex digits */
+ if (bn_expand(ret, i * 4) == NULL)
+ goto err;
+
+ j = i; /* least significant 'hex' */
+ m = 0;
+ h = 0;
+ while (j > 0) {
+ 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 = 0; /* paranoia */
+ l = (l << 4) | k;
+
+ if (--m <= 0) {
+ ret->d[h++] = l;
+ break;
+ }
+ }
+ j -= (BN_BYTES * 2);
+ }
+ ret->top = h;
+ bn_correct_top(ret);
+ ret->neg = neg;
+
+ *bn = ret;
+ bn_check_top(ret);
+ return (num);
+ err:
+ if (*bn == NULL)
+ BN_free(ret);
+ return (0);
+}
+
+int BN_dec2bn(BIGNUM **bn, const char *a)
+{
+ BIGNUM *ret = NULL;
+ BN_ULONG l = 0;
+ int neg = 0, i, j;
+ int num;
+
+ if ((a == NULL) || (*a == '\0'))
+ return (0);
+ if (*a == '-') {
+ neg = 1;
+ a++;
+ }
+
+ for (i = 0; i <= (INT_MAX/4) && isdigit((unsigned char)a[i]); i++)
+ continue;
+
+ if (i > INT_MAX/4)
+ goto err;
+
+ num = i + neg;
+ if (bn == NULL)
+ return (num);
+
+ /*
+ * a is the start of the digits, and it is 'i' long. We chop it into
+ * BN_DEC_NUM digits at a time
+ */
+ if (*bn == NULL) {
+ if ((ret = BN_new()) == NULL)
+ return (0);
+ } else {
+ ret = *bn;
+ BN_zero(ret);
+ }
+
+ /* 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);
+ if (j == BN_DEC_NUM)
+ j = 0;
+ l = 0;
+ while (*a) {
+ l *= 10;
+ l += *a - '0';
+ a++;
+ if (++j == BN_DEC_NUM) {
+ BN_mul_word(ret, BN_DEC_CONV);
+ BN_add_word(ret, l);
+ l = 0;
+ j = 0;
+ }
+ }
+ ret->neg = neg;
+
+ bn_correct_top(ret);
+ *bn = ret;
+ bn_check_top(ret);
+ return (num);
+ err:
+ if (*bn == NULL)
+ BN_free(ret);
+ return (0);
+}
+
+int BN_asc2bn(BIGNUM **bn, const char *a)
+{
+ const char *p = a;
+ if (*p == '-')
+ p++;
+
+ if (p[0] == '0' && (p[1] == 'X' || p[1] == 'x')) {
+ if (!BN_hex2bn(bn, p + 2))
+ return 0;
+ } else {
+ if (!BN_dec2bn(bn, p))
+ return 0;
+ }
+ if (*a == '-')
+ (*bn)->neg = 1;
+ return 1;
+}
+
+#ifndef OPENSSL_NO_BIO
+# ifndef OPENSSL_NO_FP_API
+int BN_print_fp(FILE *fp, const BIGNUM *a)
+{
+ BIO *b;
+ int ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL)
+ return (0);
+ BIO_set_fp(b, fp, BIO_NOCLOSE);
+ ret = BN_print(b, a);
+ BIO_free(b);
+ return (ret);
+}
+# endif
+
+int BN_print(BIO *bp, const BIGNUM *a)
+{
+ int i, j, v, z = 0;
+ int ret = 0;
+
+ if ((a->neg) && (BIO_write(bp, "-", 1) != 1))
+ goto end;
+ 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)
+ goto end;
+ z = 1;
+ }
+ }
+ }
+ ret = 1;
+ end:
+ return (ret);
+}
+#endif
+
+char *BN_options(void)
+{
+ static int init = 0;
+ static char data[16];
+
+ if (!init) {
+ init++;
+#ifdef BN_LLONG
+ BIO_snprintf(data, sizeof data, "bn(%d,%d)",
+ (int)sizeof(BN_ULLONG) * 8, (int)sizeof(BN_ULONG) * 8);
+#else
+ BIO_snprintf(data, sizeof data, "bn(%d,%d)",
+ (int)sizeof(BN_ULONG) * 8, (int)sizeof(BN_ULONG) * 8);
+#endif
+ }
+ return (data);
+}
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