1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
57 #include <openssl/mem.h>
64 #if defined(OPENSSL_WINDOWS)
65 OPENSSL_MSVC_PRAGMA(warning(push, 3))
67 OPENSSL_MSVC_PRAGMA(warning(pop))
73 #define OPENSSL_MALLOC_PREFIX 8
76 void *OPENSSL_malloc(size_t size) {
77 void *ptr = malloc(size + OPENSSL_MALLOC_PREFIX);
82 *(size_t *)ptr = size;
84 return ((uint8_t *)ptr) + OPENSSL_MALLOC_PREFIX;
87 void OPENSSL_free(void *orig_ptr) {
88 if (orig_ptr == NULL) {
92 void *ptr = ((uint8_t *)orig_ptr) - OPENSSL_MALLOC_PREFIX;
94 size_t size = *(size_t *)ptr;
95 OPENSSL_cleanse(ptr, size + OPENSSL_MALLOC_PREFIX);
99 void *OPENSSL_realloc(void *orig_ptr, size_t new_size) {
100 if (orig_ptr == NULL) {
101 return OPENSSL_malloc(new_size);
104 void *ptr = ((uint8_t *)orig_ptr) - OPENSSL_MALLOC_PREFIX;
105 size_t old_size = *(size_t *)ptr;
107 void *ret = OPENSSL_malloc(new_size);
112 size_t to_copy = new_size;
113 if (old_size < to_copy) {
117 memcpy(ret, orig_ptr, to_copy);
118 OPENSSL_free(orig_ptr);
123 void OPENSSL_cleanse(void *ptr, size_t len) {
124 #if defined(OPENSSL_WINDOWS)
125 SecureZeroMemory(ptr, len);
127 OPENSSL_memset(ptr, 0, len);
129 #if !defined(OPENSSL_NO_ASM)
130 /* As best as we can tell, this is sufficient to break any optimisations that
131 might try to eliminate "superfluous" memsets. If there's an easy way to
132 detect memset_s, it would be better to use that. */
133 __asm__ __volatile__("" : : "r"(ptr) : "memory");
135 #endif // !OPENSSL_NO_ASM
138 int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len) {
139 const uint8_t *a = in_a;
140 const uint8_t *b = in_b;
143 for (size_t i = 0; i < len; i++) {
150 uint32_t OPENSSL_hash32(const void *ptr, size_t len) {
151 // These are the FNV-1a parameters for 32 bits.
152 static const uint32_t kPrime = 16777619u;
153 static const uint32_t kOffsetBasis = 2166136261u;
155 const uint8_t *in = ptr;
156 uint32_t h = kOffsetBasis;
158 for (size_t i = 0; i < len; i++) {
166 size_t OPENSSL_strnlen(const char *s, size_t len) {
167 for (size_t i = 0; i < len; i++) {
176 char *OPENSSL_strdup(const char *s) {
177 const size_t len = strlen(s) + 1;
178 char *ret = OPENSSL_malloc(len);
182 OPENSSL_memcpy(ret, s, len);
186 int OPENSSL_tolower(int c) {
187 if (c >= 'A' && c <= 'Z') {
188 return c + ('a' - 'A');
193 int OPENSSL_strcasecmp(const char *a, const char *b) {
194 for (size_t i = 0;; i++) {
195 const int aa = OPENSSL_tolower(a[i]);
196 const int bb = OPENSSL_tolower(b[i]);
200 } else if (aa > bb) {
202 } else if (aa == 0) {
208 int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
209 for (size_t i = 0; i < n; i++) {
210 const int aa = OPENSSL_tolower(a[i]);
211 const int bb = OPENSSL_tolower(b[i]);
215 } else if (aa > bb) {
217 } else if (aa == 0) {
225 int BIO_snprintf(char *buf, size_t n, const char *format, ...) {
227 va_start(args, format);
228 int ret = BIO_vsnprintf(buf, n, format, args);
233 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args) {
234 return vsnprintf(buf, n, format, args);