blob: edd14a819e4d4c7ebbbc7c8ee83cb81a3790df46 [file] [log] [blame]
David Benjamin820731a2015-07-23 20:01:51 -04001/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
Adam Langley95c29f32014-06-20 12:00:00 -07003 *
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.
7 *
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).
14 *
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.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
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)"
39 *
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
50 * SUCH DAMAGE.
51 *
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.] */
56
Adam Langley51fcd872014-10-02 15:35:35 -070057#if !defined(_POSIX_C_SOURCE)
Adam Langleyad912f32014-10-02 13:58:19 -070058#define _POSIX_C_SOURCE 201410L /* needed for strdup, snprintf, vprintf etc */
Adam Langley51fcd872014-10-02 15:35:35 -070059#endif
Adam Langley95c29f32014-06-20 12:00:00 -070060
61#include <openssl/mem.h>
62
63#include <assert.h>
64#include <stdarg.h>
65#include <stdio.h>
66#include <string.h>
67
Adam Langleyded93582014-07-31 15:23:51 -070068#if defined(OPENSSL_WINDOWS)
Brian Smithefed2212015-01-28 16:20:02 -080069#pragma warning(push, 3)
Adam Langley3e719312015-03-20 16:32:23 -070070#include <windows.h>
Brian Smithefed2212015-01-28 16:20:02 -080071#pragma warning(pop)
Adam Langleyad912f32014-10-02 13:58:19 -070072#else
73#include <strings.h>
Adam Langleyded93582014-07-31 15:23:51 -070074#endif
75
Adam Langley95c29f32014-06-20 12:00:00 -070076
77void *OPENSSL_realloc_clean(void *ptr, size_t old_size, size_t new_size) {
78 void *ret = NULL;
79
80 if (ptr == NULL) {
81 return OPENSSL_malloc(new_size);
82 }
83
84 if (new_size == 0) {
85 return NULL;
86 }
87
88 /* We don't support shrinking the buffer. Note the memcpy that copies
89 * |old_size| bytes to the new buffer, below. */
90 if (new_size < old_size) {
91 return NULL;
92 }
93
94 ret = OPENSSL_malloc(new_size);
95 if (ret == NULL) {
96 return NULL;
97 }
98
99 memcpy(ret, ptr, old_size);
100 OPENSSL_cleanse(ptr, old_size);
101 OPENSSL_free(ptr);
102 return ret;
103}
104
Adam Langleyad1907f2014-07-30 11:55:17 -0700105void OPENSSL_cleanse(void *ptr, size_t len) {
Adam Langleyded93582014-07-31 15:23:51 -0700106#if defined(OPENSSL_WINDOWS)
107 SecureZeroMemory(ptr, len);
108#else
109 memset(ptr, 0, len);
Adam Langleyad1907f2014-07-30 11:55:17 -0700110
Adam Langleycf052cf2014-07-31 18:46:35 -0700111#if !defined(OPENSSL_NO_ASM)
Adam Langleyad1907f2014-07-30 11:55:17 -0700112 /* As best as we can tell, this is sufficient to break any optimisations that
113 might try to eliminate "superfluous" memsets. If there's an easy way to
114 detect memset_s, it would be better to use that. */
Adam Langleyad1907f2014-07-30 11:55:17 -0700115 __asm__ __volatile__("" : : "r"(ptr) : "memory");
116#endif
Adam Langleycf052cf2014-07-31 18:46:35 -0700117#endif /* !OPENSSL_NO_ASM */
Adam Langleyad1907f2014-07-30 11:55:17 -0700118}
119
Adam Langley95c29f32014-06-20 12:00:00 -0700120int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len) {
121 size_t i;
122 const uint8_t *a = in_a;
123 const uint8_t *b = in_b;
124 uint8_t x = 0;
125
126 for (i = 0; i < len; i++) {
127 x |= a[i] ^ b[i];
128 }
129
130 return x;
131}
132
133uint32_t OPENSSL_hash32(const void *ptr, size_t len) {
134 /* These are the FNV-1a parameters for 32 bits. */
135 static const uint32_t kPrime = 16777619u;
136 static const uint32_t kOffsetBasis = 2166136261u;
137
138 const uint8_t *in = ptr;
139 size_t i;
140 uint32_t h = kOffsetBasis;
141
142 for (i = 0; i < len; i++) {
143 h ^= in[i];
144 h *= kPrime;
145 }
146
147 return h;
148}
149
150char *OPENSSL_strdup(const char *s) { return strdup(s); }
151
Adam Langley01797e32014-06-20 12:00:00 -0700152size_t OPENSSL_strnlen(const char *s, size_t len) {
153 size_t i;
154
155 for (i = 0; i < len; i++) {
156 if (s[i] == 0) {
157 return i;
158 }
159 }
160
161 return len;
162}
163
Adam Langleyb0d5fb62014-06-20 12:00:00 -0700164#if defined(OPENSSL_WINDOWS)
165
166int OPENSSL_strcasecmp(const char *a, const char *b) {
Adam Langleyded93582014-07-31 15:23:51 -0700167 return _stricmp(a, b);
Adam Langleyb0d5fb62014-06-20 12:00:00 -0700168}
169
170int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
171 return _strnicmp(a, b, n);
172}
173
174#else
175
176int OPENSSL_strcasecmp(const char *a, const char *b) {
177 return strcasecmp(a, b);
178}
179
180int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) {
181 return strncasecmp(a, b, n);
182}
183
184#endif
185
Adam Langley95c29f32014-06-20 12:00:00 -0700186int BIO_snprintf(char *buf, size_t n, const char *format, ...) {
187 va_list args;
188 int ret;
189
190 va_start(args, format);
191
192 ret = BIO_vsnprintf(buf, n, format, args);
193
194 va_end(args);
195 return ret;
196}
197
198int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args) {
199 return vsnprintf(buf, n, format, args);
200}