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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)
- OPENSSL_MSVC_PRAGMA(warning(push, 3))
- #include <windows.h>
- OPENSSL_MSVC_PRAGMA(warning(pop))
- #else
- #include <strings.h>
- #endif
-
- #include "internal.h"
-
-
- #define OPENSSL_MALLOC_PREFIX 8
-
-
- void *OPENSSL_malloc(size_t size) {
- void *ptr = malloc(size + OPENSSL_MALLOC_PREFIX);
- if (ptr == NULL) {
- return NULL;
- }
-
- *(size_t *)ptr = size;
-
- return ((uint8_t *)ptr) + OPENSSL_MALLOC_PREFIX;
- }
-
- void OPENSSL_free(void *orig_ptr) {
- if (orig_ptr == NULL) {
- return;
- }
-
- void *ptr = ((uint8_t *)orig_ptr) - OPENSSL_MALLOC_PREFIX;
-
- size_t size = *(size_t *)ptr;
- OPENSSL_cleanse(ptr, size + OPENSSL_MALLOC_PREFIX);
- free(ptr);
- }
-
- void *OPENSSL_realloc(void *orig_ptr, size_t new_size) {
- if (orig_ptr == NULL) {
- return OPENSSL_malloc(new_size);
- }
-
- void *ptr = ((uint8_t *)orig_ptr) - OPENSSL_MALLOC_PREFIX;
- size_t old_size = *(size_t *)ptr;
-
- void *ret = OPENSSL_malloc(new_size);
- if (ret == NULL) {
- return NULL;
- }
-
- size_t to_copy = new_size;
- if (old_size < to_copy) {
- to_copy = old_size;
- }
-
- memcpy(ret, orig_ptr, to_copy);
- OPENSSL_free(orig_ptr);
-
- return ret;
- }
-
- void OPENSSL_cleanse(void *ptr, size_t len) {
- #if defined(OPENSSL_WINDOWS)
- SecureZeroMemory(ptr, len);
- #else
- OPENSSL_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) {
- const uint8_t *a = in_a;
- const uint8_t *b = in_b;
- uint8_t x = 0;
-
- for (size_t 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;
- uint32_t h = kOffsetBasis;
-
- for (size_t i = 0; i < len; i++) {
- h ^= in[i];
- h *= kPrime;
- }
-
- return h;
- }
-
- size_t OPENSSL_strnlen(const char *s, size_t len) {
- for (size_t i = 0; i < len; i++) {
- if (s[i] == 0) {
- return i;
- }
- }
-
- return len;
- }
-
- char *OPENSSL_strdup(const char *s) {
- const size_t len = strlen(s) + 1;
- char *ret = OPENSSL_malloc(len);
- if (ret == NULL) {
- return NULL;
- }
- OPENSSL_memcpy(ret, s, len);
- return ret;
- }
-
- int OPENSSL_tolower(int c) {
- if (c >= 'A' && c <= 'Z') {
- return c + ('a' - 'A');
- }
- return c;
- }
-
- int OPENSSL_strcasecmp(const char *a, const char *b) {
- for (size_t i = 0;; i++) {
- const int aa = OPENSSL_tolower(a[i]);
- const int bb = OPENSSL_tolower(b[i]);
-
- if (aa < bb) {
- return -1;
- } else if (aa > bb) {
- return 1;
- } else if (aa == 0) {
- return 0;
- }
- }
- }
-
- int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
- for (size_t i = 0; i < n; i++) {
- const int aa = OPENSSL_tolower(a[i]);
- const int bb = OPENSSL_tolower(b[i]);
-
- if (aa < bb) {
- return -1;
- } else if (aa > bb) {
- return 1;
- } else if (aa == 0) {
- return 0;
- }
- }
-
- return 0;
- }
-
- int BIO_snprintf(char *buf, size_t n, const char *format, ...) {
- va_list args;
- va_start(args, format);
- int 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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