--- /dev/null
+/* 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/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))
+#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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