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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.] */
-
- #if !defined(_POSIX_C_SOURCE)
- #define _POSIX_C_SOURCE 201410L /* needed for strdup, snprintf, vprintf etc */
- #endif
-
- #include <openssl/mem.h>
-
- #include <assert.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <string.h>
-
- #if defined(OPENSSL_WINDOWS)
- #pragma warning(push, 3)
- #include <windows.h>
- #pragma warning(pop)
- #else
- #include <strings.h>
- #endif
-
-
- void *OPENSSL_realloc_clean(void *ptr, size_t old_size, size_t new_size) {
- void *ret = NULL;
-
- if (ptr == NULL) {
- return OPENSSL_malloc(new_size);
- }
-
- if (new_size == 0) {
- return NULL;
- }
-
- /* We don't support shrinking the buffer. Note the memcpy that copies
- * |old_size| bytes to the new buffer, below. */
- if (new_size < old_size) {
- return NULL;
- }
-
- ret = OPENSSL_malloc(new_size);
- if (ret == NULL) {
- return NULL;
- }
-
- memcpy(ret, ptr, old_size);
- OPENSSL_cleanse(ptr, old_size);
- OPENSSL_free(ptr);
- return ret;
- }
-
- void OPENSSL_cleanse(void *ptr, size_t len) {
- #if defined(OPENSSL_WINDOWS)
- SecureZeroMemory(ptr, len);
- #else
- memset(ptr, 0, len);
-
- #if !defined(OPENSSL_NO_ASM)
- /* As best as we can tell, this is sufficient to break any optimisations that
- might try to eliminate "superfluous" memsets. If there's an easy way to
- detect memset_s, it would be better to use that. */
- __asm__ __volatile__("" : : "r"(ptr) : "memory");
- #endif
- #endif /* !OPENSSL_NO_ASM */
- }
-
- int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len) {
- size_t i;
- const uint8_t *a = in_a;
- const uint8_t *b = in_b;
- uint8_t x = 0;
-
- for (i = 0; i < len; i++) {
- x |= a[i] ^ b[i];
- }
-
- return x;
- }
-
- uint32_t OPENSSL_hash32(const void *ptr, size_t len) {
- /* These are the FNV-1a parameters for 32 bits. */
- static const uint32_t kPrime = 16777619u;
- static const uint32_t kOffsetBasis = 2166136261u;
-
- const uint8_t *in = ptr;
- size_t i;
- uint32_t h = kOffsetBasis;
-
- for (i = 0; i < len; i++) {
- h ^= in[i];
- h *= kPrime;
- }
-
- return h;
- }
-
- char *OPENSSL_strdup(const char *s) { return strdup(s); }
-
- size_t OPENSSL_strnlen(const char *s, size_t len) {
- size_t i;
-
- for (i = 0; i < len; i++) {
- if (s[i] == 0) {
- return i;
- }
- }
-
- return len;
- }
-
- #if defined(OPENSSL_WINDOWS)
-
- int OPENSSL_strcasecmp(const char *a, const char *b) {
- return _stricmp(a, b);
- }
-
- int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
- return _strnicmp(a, b, n);
- }
-
- #else
-
- int OPENSSL_strcasecmp(const char *a, const char *b) {
- return strcasecmp(a, b);
- }
-
- int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
- return strncasecmp(a, b, n);
- }
-
- #endif
-
- 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) {
- return vsnprintf(buf, n, format, args);
- }
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