1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 57 #ifndef OPENSSL_HEADER_MEM_H 58 #define OPENSSL_HEADER_MEM_H 59 60 #include <openssl/base.h> 61 62 #include <stdlib.h> 63 #include <stdarg.h> 64 65 #if defined(__cplusplus) 66 extern "C" { 67 #endif 68 69 70 /* Memory and string functions, see also buf.h. 71 * 72 * OpenSSL has, historically, had a complex set of malloc debugging options. 73 * However, that was written in a time before Valgrind and ASAN. Since we now 74 * have those tools, the OpenSSL allocation functions are simply macros around 75 * the standard memory functions. */ 76 77 78 #define OPENSSL_malloc malloc 79 #define OPENSSL_realloc realloc 80 #define OPENSSL_free free 81 82 /* OPENSSL_realloc_clean acts like |realloc|, but clears the previous memory 83 * buffer. Because this is implemented as a wrapper around |malloc|, it needs 84 * to be given the size of the buffer pointed to by |ptr|. */ 85 void *OPENSSL_realloc_clean(void *ptr, size_t old_size, size_t new_size); 86 87 /* OPENSSL_cleanse zeros out |len| bytes of memory at |ptr|. This is similar to 88 * |memset_s| from C11. */ 89 OPENSSL_EXPORT void OPENSSL_cleanse(void *ptr, size_t len); 90 91 /* CRYPTO_memcmp returns zero iff the |len| bytes at |a| and |b| are equal. It 92 * takes an amount of time dependent on |len|, but independent of the contents 93 * of |a| and |b|. Unlike memcmp, it cannot be used to put elements into a 94 * defined order as the return value when a != b is undefined, other than to be 95 * non-zero. */ 96 OPENSSL_EXPORT int CRYPTO_memcmp(const void *a, const void *b, size_t len); 97 98 /* OPENSSL_hash32 implements the 32 bit, FNV-1a hash. */ 99 OPENSSL_EXPORT uint32_t OPENSSL_hash32(const void *ptr, size_t len); 100 101 /* OPENSSL_strdup has the same behaviour as strdup(3). */ 102 OPENSSL_EXPORT char *OPENSSL_strdup(const char *s); 103 104 /* OPENSSL_strnlen has the same behaviour as strnlen(3). */ 105 OPENSSL_EXPORT size_t OPENSSL_strnlen(const char *s, size_t len); 106 107 /* OPENSSL_strcasecmp has the same behaviour as strcasecmp(3). */ 108 OPENSSL_EXPORT int OPENSSL_strcasecmp(const char *a, const char *b); 109 110 /* OPENSSL_strncasecmp has the same behaviour as strncasecmp(3). */ 111 OPENSSL_EXPORT int OPENSSL_strncasecmp(const char *a, const char *b, size_t n); 112 113 /* DECIMAL_SIZE returns an upper bound for the length of the decimal 114 * representation of the given type. */ 115 #define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1) 116 117 /* Printf functions. 118 * 119 * These functions are either OpenSSL wrappers for standard functions (i.e. 120 * |BIO_snprintf| and |BIO_vsnprintf|) which don't exist in C89, or are 121 * versions of printf functions that output to a BIO rather than a FILE. */ 122 #ifdef __GNUC__ 123 #define __bio_h__attr__ __attribute__ 124 #else 125 #define __bio_h__attr__(x) 126 #endif 127 OPENSSL_EXPORT int BIO_snprintf(char *buf, size_t n, const char *format, ...) 128 __bio_h__attr__((__format__(__printf__, 3, 4))); 129 130 OPENSSL_EXPORT int BIO_vsnprintf(char *buf, size_t n, const char *format, 131 va_list args) 132 __bio_h__attr__((__format__(__printf__, 3, 0))); 133 #undef __bio_h__attr__ 134 135 136 #if defined(__cplusplus) 137 } /* extern C */ 138 #endif 139 140 #endif /* OPENSSL_HEADER_MEM_H */ 141
