1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 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 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 // 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. 76 77 78 #ifndef _BORINGSSL_PROHIBIT_OPENSSL_MALLOC 79 // OPENSSL_malloc is similar to a regular |malloc|, but allocates additional 80 // private data. The resulting pointer must be freed with |OPENSSL_free|. In 81 // the case of a malloc failure, prior to returning NULL |OPENSSL_malloc| will 82 // push |ERR_R_MALLOC_FAILURE| onto the openssl error stack. 83 OPENSSL_EXPORT void *OPENSSL_malloc(size_t size); 84 #endif // !_BORINGSSL_PROHIBIT_OPENSSL_MALLOC 85 86 // OPENSSL_free does nothing if |ptr| is NULL. Otherwise it zeros out the 87 // memory allocated at |ptr| and frees it along with the private data. 88 // It must only be used on on |ptr| values obtained from |OPENSSL_malloc| 89 OPENSSL_EXPORT void OPENSSL_free(void *ptr); 90 91 #ifndef _BORINGSSL_PROHIBIT_OPENSSL_MALLOC 92 // OPENSSL_realloc returns a pointer to a buffer of |new_size| bytes that 93 // contains the contents of |ptr|. Unlike |realloc|, a new buffer is always 94 // allocated and the data at |ptr| is always wiped and freed. Memory is 95 // allocated with |OPENSSL_malloc| and must be freed with |OPENSSL_free|. 96 OPENSSL_EXPORT void *OPENSSL_realloc(void *ptr, size_t new_size); 97 #endif // !_BORINGSSL_PROHIBIT_OPENSSL_MALLOC 98 99 // OPENSSL_cleanse zeros out |len| bytes of memory at |ptr|. This is similar to 100 // |memset_s| from C11. 101 OPENSSL_EXPORT void OPENSSL_cleanse(void *ptr, size_t len); 102 103 // CRYPTO_memcmp returns zero iff the |len| bytes at |a| and |b| are equal. It 104 // takes an amount of time dependent on |len|, but independent of the contents 105 // of |a| and |b|. Unlike memcmp, it cannot be used to put elements into a 106 // defined order as the return value when a != b is undefined, other than to be 107 // non-zero. 108 OPENSSL_EXPORT int CRYPTO_memcmp(const void *a, const void *b, size_t len); 109 110 // OPENSSL_hash32 implements the 32 bit, FNV-1a hash. 111 OPENSSL_EXPORT uint32_t OPENSSL_hash32(const void *ptr, size_t len); 112 113 // OPENSSL_strhash calls |OPENSSL_hash32| on the NUL-terminated string |s|. 114 OPENSSL_EXPORT uint32_t OPENSSL_strhash(const char *s); 115 116 // OPENSSL_strdup has the same behaviour as strdup(3). 117 OPENSSL_EXPORT char *OPENSSL_strdup(const char *s); 118 119 // OPENSSL_strnlen has the same behaviour as strnlen(3). 120 OPENSSL_EXPORT size_t OPENSSL_strnlen(const char *s, size_t len); 121 122 // OPENSSL_isalpha is a locale-independent, ASCII-only version of isalpha(3), It 123 // only recognizes 'a' through 'z' and 'A' through 'Z' as alphabetic. 124 OPENSSL_EXPORT int OPENSSL_isalpha(int c); 125 126 // OPENSSL_isdigit is a locale-independent, ASCII-only version of isdigit(3), It 127 // only recognizes '0' through '9' as digits. 128 OPENSSL_EXPORT int OPENSSL_isdigit(int c); 129 130 // OPENSSL_isxdigit is a locale-independent, ASCII-only version of isxdigit(3), 131 // It only recognizes '0' through '9', 'a' through 'f', and 'A through 'F' as 132 // digits. 133 OPENSSL_EXPORT int OPENSSL_isxdigit(int c); 134 135 // OPENSSL_fromxdigit returns one if |c| is a hexadecimal digit as recognized 136 // by OPENSSL_isxdigit, and sets |out| to the corresponding value. Otherwise 137 // zero is returned. 138 OPENSSL_EXPORT int OPENSSL_fromxdigit(uint8_t *out, int c); 139 140 // OPENSSL_isalnum is a locale-independent, ASCII-only version of isalnum(3), It 141 // only recognizes what |OPENSSL_isalpha| and |OPENSSL_isdigit| recognize. 142 OPENSSL_EXPORT int OPENSSL_isalnum(int c); 143 144 // OPENSSL_tolower is a locale-independent, ASCII-only version of tolower(3). It 145 // only lowercases ASCII values. Other values are returned as-is. 146 OPENSSL_EXPORT int OPENSSL_tolower(int c); 147 148 // OPENSSL_isspace is a locale-independent, ASCII-only version of isspace(3). It 149 // only recognizes '\t', '\n', '\v', '\f', '\r', and ' '. 150 OPENSSL_EXPORT int OPENSSL_isspace(int c); 151 152 // OPENSSL_strcasecmp is a locale-independent, ASCII-only version of 153 // strcasecmp(3). 154 OPENSSL_EXPORT int OPENSSL_strcasecmp(const char *a, const char *b); 155 156 // OPENSSL_strncasecmp is a locale-independent, ASCII-only version of 157 // strncasecmp(3). 158 OPENSSL_EXPORT int OPENSSL_strncasecmp(const char *a, const char *b, size_t n); 159 160 // DECIMAL_SIZE returns an upper bound for the length of the decimal 161 // representation of the given type. 162 #define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1) 163 164 // BIO_snprintf has the same behavior as snprintf(3). 165 OPENSSL_EXPORT int BIO_snprintf(char *buf, size_t n, const char *format, ...) 166 OPENSSL_PRINTF_FORMAT_FUNC(3, 4); 167 168 // BIO_vsnprintf has the same behavior as vsnprintf(3). 169 OPENSSL_EXPORT int BIO_vsnprintf(char *buf, size_t n, const char *format, 170 va_list args) OPENSSL_PRINTF_FORMAT_FUNC(3, 0); 171 172 // OPENSSL_vasprintf has the same behavior as vasprintf(3), except that 173 // memory allocated in a returned string must be freed with |OPENSSL_free|. 174 OPENSSL_EXPORT int OPENSSL_vasprintf(char **str, const char *format, 175 va_list args) 176 OPENSSL_PRINTF_FORMAT_FUNC(2, 0); 177 178 // OPENSSL_asprintf has the same behavior as asprintf(3), except that 179 // memory allocated in a returned string must be freed with |OPENSSL_free|. 180 OPENSSL_EXPORT int OPENSSL_asprintf(char **str, const char *format, ...) 181 OPENSSL_PRINTF_FORMAT_FUNC(2, 3); 182 183 // OPENSSL_strndup returns an allocated, duplicate of |str|, which is, at most, 184 // |size| bytes. The result is always NUL terminated. The memory allocated 185 // must be freed with |OPENSSL_free|. 186 OPENSSL_EXPORT char *OPENSSL_strndup(const char *str, size_t size); 187 188 // OPENSSL_memdup returns an allocated, duplicate of |size| bytes from |data| or 189 // NULL on allocation failure. The memory allocated must be freed with 190 // |OPENSSL_free|. 191 OPENSSL_EXPORT void *OPENSSL_memdup(const void *data, size_t size); 192 193 // OPENSSL_strlcpy acts like strlcpy(3). 194 OPENSSL_EXPORT size_t OPENSSL_strlcpy(char *dst, const char *src, 195 size_t dst_size); 196 197 // OPENSSL_strlcat acts like strlcat(3). 198 OPENSSL_EXPORT size_t OPENSSL_strlcat(char *dst, const char *src, 199 size_t dst_size); 200 201 202 // Deprecated functions. 203 204 // CRYPTO_malloc calls |OPENSSL_malloc|. |file| and |line| are ignored. 205 OPENSSL_EXPORT void *CRYPTO_malloc(size_t size, const char *file, int line); 206 207 // CRYPTO_realloc calls |OPENSSL_realloc|. |file| and |line| are ignored. 208 OPENSSL_EXPORT void *CRYPTO_realloc(void *ptr, size_t new_size, 209 const char *file, int line); 210 211 // CRYPTO_free calls |OPENSSL_free|. |file| and |line| are ignored. 212 OPENSSL_EXPORT void CRYPTO_free(void *ptr, const char *file, int line); 213 214 // OPENSSL_clear_free calls |OPENSSL_free|. BoringSSL automatically clears all 215 // allocations on free, but we define |OPENSSL_clear_free| for compatibility. 216 OPENSSL_EXPORT void OPENSSL_clear_free(void *ptr, size_t len); 217 218 // CRYPTO_secure_malloc_init returns zero. 219 OPENSSL_EXPORT int CRYPTO_secure_malloc_init(size_t size, size_t min_size); 220 221 // CRYPTO_secure_malloc_initialized returns zero. 222 OPENSSL_EXPORT int CRYPTO_secure_malloc_initialized(void); 223 224 // CRYPTO_secure_used returns zero. 225 OPENSSL_EXPORT size_t CRYPTO_secure_used(void); 226 227 // OPENSSL_secure_malloc calls |OPENSSL_malloc|. 228 OPENSSL_EXPORT void *OPENSSL_secure_malloc(size_t size); 229 230 // OPENSSL_secure_clear_free calls |OPENSSL_clear_free|. 231 OPENSSL_EXPORT void OPENSSL_secure_clear_free(void *ptr, size_t len); 232 233 234 #if defined(__cplusplus) 235 } // extern C 236 237 extern "C++" { 238 239 BSSL_NAMESPACE_BEGIN 240 241 BORINGSSL_MAKE_DELETER(char, OPENSSL_free) 242 BORINGSSL_MAKE_DELETER(uint8_t, OPENSSL_free) 243 244 BSSL_NAMESPACE_END 245 246 } // extern C++ 247 248 #endif 249 250 #endif // OPENSSL_HEADER_MEM_H 251