1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved.
3 * This package is an SSL implementation written
4 * by Eric Young (eay@cryptsoft.com).
5 * The implementation was written so as to conform with Netscapes SSL.
7 * This library is free for commercial and non-commercial use as long as
8 * the following conditions are aheared to. The following conditions
9 * apply to all code found in this distribution, be it the RC4, RSA,
10 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
11 * included with this distribution is covered by the same copyright terms
12 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 * Copyright remains Eric Young's, and as such any Copyright notices in
15 * the code are not to be removed.
16 * If this package is used in a product, Eric Young should be given attribution
17 * as the author of the parts of the library used.
18 * This can be in the form of a textual message at program startup or
19 * in documentation (online or textual) provided with the package.
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
24 * 1. Redistributions of source code must retain the copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 * 3. All advertising materials mentioning features or use of this software
30 * must display the following acknowledgement:
31 * "This product includes cryptographic software written by
32 * Eric Young (eay@cryptsoft.com)"
33 * The word 'cryptographic' can be left out if the rouines from the library
34 * being used are not cryptographic related :-).
35 * 4. If you include any Windows specific code (or a derivative thereof) from
36 * the apps directory (application code) you must include an acknowledgement:
37 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * The licence and distribution terms for any publically available version or
52 * derivative of this code cannot be changed. i.e. this code cannot simply be
53 * copied and put under another distribution licence
54 * [including the GNU Public Licence.] */
56 #if !defined(_POSIX_C_SOURCE)
57 #define _POSIX_C_SOURCE 201410L /* needed for strdup, snprintf, vprintf etc */
60 #include <openssl/mem.h>
67 #if defined(OPENSSL_WINDOWS)
74 void *OPENSSL_realloc_clean(void *ptr, size_t old_size, size_t new_size) {
78 return OPENSSL_malloc(new_size);
85 /* We don't support shrinking the buffer. Note the memcpy that copies
86 * |old_size| bytes to the new buffer, below. */
87 if (new_size < old_size) {
91 ret = OPENSSL_malloc(new_size);
96 memcpy(ret, ptr, old_size);
97 OPENSSL_cleanse(ptr, old_size);
102 void OPENSSL_cleanse(void *ptr, size_t len) {
103 #if defined(OPENSSL_WINDOWS)
104 SecureZeroMemory(ptr, len);
108 #if !defined(OPENSSL_NO_ASM)
109 /* As best as we can tell, this is sufficient to break any optimisations that
110 might try to eliminate "superfluous" memsets. If there's an easy way to
111 detect memset_s, it would be better to use that. */
112 __asm__ __volatile__("" : : "r"(ptr) : "memory");
114 #endif /* !OPENSSL_NO_ASM */
117 int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len) {
119 const uint8_t *a = in_a;
120 const uint8_t *b = in_b;
123 for (i = 0; i < len; i++) {
130 uint32_t OPENSSL_hash32(const void *ptr, size_t len) {
131 /* These are the FNV-1a parameters for 32 bits. */
132 static const uint32_t kPrime = 16777619u;
133 static const uint32_t kOffsetBasis = 2166136261u;
135 const uint8_t *in = ptr;
137 uint32_t h = kOffsetBasis;
139 for (i = 0; i < len; i++) {
147 char *OPENSSL_strdup(const char *s) { return strdup(s); }
149 size_t OPENSSL_strnlen(const char *s, size_t len) {
152 for (i = 0; i < len; i++) {
161 #if defined(OPENSSL_WINDOWS)
163 int OPENSSL_strcasecmp(const char *a, const char *b) {
164 return _stricmp(a, b);
167 int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
168 return _strnicmp(a, b, n);
173 int OPENSSL_strcasecmp(const char *a, const char *b) {
174 return strcasecmp(a, b);
177 int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
178 return strncasecmp(a, b, n);
183 int BIO_snprintf(char *buf, size_t n, const char *format, ...) {
187 va_start(args, format);
189 ret = BIO_vsnprintf(buf, n, format, args);
195 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args) {
196 return vsnprintf(buf, n, format, args);