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-rw-r--r--third_party/boringssl/src/crypto/bn/bn.c342
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diff --git a/third_party/boringssl/src/crypto/bn/bn.c b/third_party/boringssl/src/crypto/bn/bn.c
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--- a/third_party/boringssl/src/crypto/bn/bn.c
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-/* 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 <openssl/bn.h>
-
-#include <limits.h>
-#include <string.h>
-
-#include <openssl/err.h>
-#include <openssl/mem.h>
-
-#include "internal.h"
-
-
-BIGNUM *BN_new(void) {
- BIGNUM *bn = OPENSSL_malloc(sizeof(BIGNUM));
-
- if (bn == NULL) {
- OPENSSL_PUT_ERROR(BN, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- memset(bn, 0, sizeof(BIGNUM));
- bn->flags = BN_FLG_MALLOCED;
-
- return bn;
-}
-
-void BN_init(BIGNUM *bn) {
- memset(bn, 0, sizeof(BIGNUM));
-}
-
-void BN_free(BIGNUM *bn) {
- if (bn == NULL) {
- return;
- }
-
- if ((bn->flags & BN_FLG_STATIC_DATA) == 0) {
- OPENSSL_free(bn->d);
- }
-
- if (bn->flags & BN_FLG_MALLOCED) {
- OPENSSL_free(bn);
- } else {
- bn->d = NULL;
- }
-}
-
-void BN_clear_free(BIGNUM *bn) {
- char should_free;
-
- if (bn == NULL) {
- return;
- }
-
- if (bn->d != NULL) {
- OPENSSL_cleanse(bn->d, bn->dmax * sizeof(bn->d[0]));
- if ((bn->flags & BN_FLG_STATIC_DATA) == 0) {
- OPENSSL_free(bn->d);
- }
- }
-
- should_free = (bn->flags & BN_FLG_MALLOCED) != 0;
- OPENSSL_cleanse(bn, sizeof(BIGNUM));
- if (should_free) {
- OPENSSL_free(bn);
- }
-}
-
-BIGNUM *BN_dup(const BIGNUM *src) {
- BIGNUM *copy;
-
- if (src == NULL) {
- return NULL;
- }
-
- copy = BN_new();
- if (copy == NULL) {
- return NULL;
- }
-
- if (!BN_copy(copy, src)) {
- BN_free(copy);
- return NULL;
- }
-
- return copy;
-}
-
-BIGNUM *BN_copy(BIGNUM *dest, const BIGNUM *src) {
- if (src == dest) {
- return dest;
- }
-
- if (bn_wexpand(dest, src->top) == NULL) {
- return NULL;
- }
-
- memcpy(dest->d, src->d, sizeof(src->d[0]) * src->top);
-
- dest->top = src->top;
- dest->neg = src->neg;
- return dest;
-}
-
-void BN_clear(BIGNUM *bn) {
- if (bn->d != NULL) {
- memset(bn->d, 0, bn->dmax * sizeof(bn->d[0]));
- }
-
- bn->top = 0;
- bn->neg = 0;
-}
-
-const BIGNUM *BN_value_one(void) {
- static const BN_ULONG data_one = 1;
- static const BIGNUM const_one = {(BN_ULONG *)&data_one, 1, 1, 0,
- BN_FLG_STATIC_DATA};
-
- return &const_one;
-}
-
-void BN_with_flags(BIGNUM *out, const BIGNUM *in, int flags) {
- memcpy(out, in, sizeof(BIGNUM));
- out->flags &= ~BN_FLG_MALLOCED;
- out->flags |= BN_FLG_STATIC_DATA | flags;
-}
-
-/* BN_num_bits_word returns the minimum number of bits needed to represent the
- * value in |l|. */
-unsigned BN_num_bits_word(BN_ULONG l) {
- static const unsigned char bits[256] = {
- 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8};
-
-#if defined(OPENSSL_64_BIT)
- if (l & 0xffffffff00000000L) {
- if (l & 0xffff000000000000L) {
- if (l & 0xff00000000000000L) {
- return (bits[(int)(l >> 56)] + 56);
- } else {
- return (bits[(int)(l >> 48)] + 48);
- }
- } else {
- if (l & 0x0000ff0000000000L) {
- return (bits[(int)(l >> 40)] + 40);
- } else {
- return (bits[(int)(l >> 32)] + 32);
- }
- }
- } else
-#endif
- {
- if (l & 0xffff0000L) {
- if (l & 0xff000000L) {
- return (bits[(int)(l >> 24L)] + 24);
- } else {
- return (bits[(int)(l >> 16L)] + 16);
- }
- } else {
- if (l & 0xff00L) {
- return (bits[(int)(l >> 8)] + 8);
- } else {
- return (bits[(int)(l)]);
- }
- }
- }
-}
-
-unsigned BN_num_bits(const BIGNUM *bn) {
- const int max = bn->top - 1;
-
- if (BN_is_zero(bn)) {
- return 0;
- }
-
- return max*BN_BITS2 + BN_num_bits_word(bn->d[max]);
-}
-
-unsigned BN_num_bytes(const BIGNUM *bn) {
- return (BN_num_bits(bn) + 7) / 8;
-}
-
-void BN_zero(BIGNUM *bn) {
- bn->top = bn->neg = 0;
-}
-
-int BN_one(BIGNUM *bn) {
- return BN_set_word(bn, 1);
-}
-
-int BN_set_word(BIGNUM *bn, BN_ULONG value) {
- if (value == 0) {
- BN_zero(bn);
- return 1;
- }
-
- if (bn_wexpand(bn, 1) == NULL) {
- return 0;
- }
-
- bn->neg = 0;
- bn->d[0] = value;
- bn->top = 1;
- return 1;
-}
-
-int BN_is_negative(const BIGNUM *bn) {
- return bn->neg != 0;
-}
-
-void BN_set_negative(BIGNUM *bn, int sign) {
- if (sign && !BN_is_zero(bn)) {
- bn->neg = 1;
- } else {
- bn->neg = 0;
- }
-}
-
-BIGNUM *bn_wexpand(BIGNUM *bn, size_t words) {
- BN_ULONG *a;
-
- if (words <= (size_t)bn->dmax) {
- return bn;
- }
-
- if (words > (INT_MAX / (4 * BN_BITS2))) {
- OPENSSL_PUT_ERROR(BN, BN_R_BIGNUM_TOO_LONG);
- return NULL;
- }
-
- if (bn->flags & BN_FLG_STATIC_DATA) {
- OPENSSL_PUT_ERROR(BN, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
- return NULL;
- }
-
- a = (BN_ULONG *)OPENSSL_malloc(sizeof(BN_ULONG) * words);
- if (a == NULL) {
- OPENSSL_PUT_ERROR(BN, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- memcpy(a, bn->d, sizeof(BN_ULONG) * bn->top);
-
- OPENSSL_free(bn->d);
- bn->d = a;
- bn->dmax = (int)words;
-
- return bn;
-}
-
-BIGNUM *bn_expand(BIGNUM *bn, size_t bits) {
- if (bits + BN_BITS2 - 1 < bits) {
- OPENSSL_PUT_ERROR(BN, BN_R_BIGNUM_TOO_LONG);
- return NULL;
- }
- return bn_wexpand(bn, (bits+BN_BITS2-1)/BN_BITS2);
-}
-
-void bn_correct_top(BIGNUM *bn) {
- BN_ULONG *ftl;
- int tmp_top = bn->top;
-
- if (tmp_top > 0) {
- for (ftl = &(bn->d[tmp_top - 1]); tmp_top > 0; tmp_top--) {
- if (*(ftl--)) {
- break;
- }
- }
- bn->top = tmp_top;
- }
-}
-
-int BN_get_flags(const BIGNUM *bn, int flags) {
- return bn->flags & flags;
-}
-
-void BN_set_flags(BIGNUM *bn, int flags) {
- bn->flags |= flags;
-}