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 #ifndef OPENSSL_HEADER_MEM_H
58 #define OPENSSL_HEADER_MEM_H
60 #include <openssl/base.h>
65 #if defined(__cplusplus)
70 // Memory and string functions, see also buf.h.
72 // BoringSSL has its own set of allocation functions, which keep track of
73 // allocation lengths and zero them out before freeing. All memory returned by
74 // BoringSSL API calls must therefore generally be freed using |OPENSSL_free|
75 // unless stated otherwise.
78 // OPENSSL_malloc acts like a regular |malloc|.
79 OPENSSL_EXPORT void *OPENSSL_malloc(size_t size);
81 // OPENSSL_free does nothing if |ptr| is NULL. Otherwise it zeros out the
82 // memory allocated at |ptr| and frees it.
83 OPENSSL_EXPORT void OPENSSL_free(void *ptr);
85 // OPENSSL_realloc returns a pointer to a buffer of |new_size| bytes that
86 // contains the contents of |ptr|. Unlike |realloc|, a new buffer is always
87 // allocated and the data at |ptr| is always wiped and freed.
88 OPENSSL_EXPORT void *OPENSSL_realloc(void *ptr, size_t new_size);
90 // OPENSSL_cleanse zeros out |len| bytes of memory at |ptr|. This is similar to
91 // |memset_s| from C11.
92 OPENSSL_EXPORT void OPENSSL_cleanse(void *ptr, size_t len);
94 // CRYPTO_memcmp returns zero iff the |len| bytes at |a| and |b| are equal. It
95 // takes an amount of time dependent on |len|, but independent of the contents
96 // of |a| and |b|. Unlike memcmp, it cannot be used to put elements into a
97 // defined order as the return value when a != b is undefined, other than to be
99 OPENSSL_EXPORT int CRYPTO_memcmp(const void *a, const void *b, size_t len);
101 // OPENSSL_hash32 implements the 32 bit, FNV-1a hash.
102 OPENSSL_EXPORT uint32_t OPENSSL_hash32(const void *ptr, size_t len);
104 // OPENSSL_strdup has the same behaviour as strdup(3).
105 OPENSSL_EXPORT char *OPENSSL_strdup(const char *s);
107 // OPENSSL_strnlen has the same behaviour as strnlen(3).
108 OPENSSL_EXPORT size_t OPENSSL_strnlen(const char *s, size_t len);
110 // OPENSSL_tolower is a locale-independent version of tolower(3).
111 OPENSSL_EXPORT int OPENSSL_tolower(int c);
113 // OPENSSL_strcasecmp is a locale-independent version of strcasecmp(3).
114 OPENSSL_EXPORT int OPENSSL_strcasecmp(const char *a, const char *b);
116 // OPENSSL_strncasecmp is a locale-independent version of strncasecmp(3).
117 OPENSSL_EXPORT int OPENSSL_strncasecmp(const char *a, const char *b, size_t n);
119 // DECIMAL_SIZE returns an upper bound for the length of the decimal
120 // representation of the given type.
121 #define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1)
123 // BIO_snprintf has the same behavior as snprintf(3).
124 OPENSSL_EXPORT int BIO_snprintf(char *buf, size_t n, const char *format, ...)
125 OPENSSL_PRINTF_FORMAT_FUNC(3, 4);
127 // BIO_vsnprintf has the same behavior as vsnprintf(3).
128 OPENSSL_EXPORT int BIO_vsnprintf(char *buf, size_t n, const char *format,
130 OPENSSL_PRINTF_FORMAT_FUNC(3, 0);
133 // Deprecated functions.
135 #define CRYPTO_malloc OPENSSL_malloc
136 #define CRYPTO_realloc OPENSSL_realloc
137 #define CRYPTO_free OPENSSL_free
140 #if defined(__cplusplus)
147 BORINGSSL_MAKE_DELETER(char, OPENSSL_free)
148 BORINGSSL_MAKE_DELETER(uint8_t, OPENSSL_free)
156 #endif // OPENSSL_HEADER_MEM_H