Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. |
| 2 | * |
| 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. |
| 6 | * |
| 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). |
| 13 | * |
| 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. |
| 20 | * |
| 21 | * Redistribution and use in source and binary forms, with or without |
| 22 | * modification, are permitted provided that the following conditions |
| 23 | * are met: |
| 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)" |
| 38 | * |
| 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 |
| 49 | * SUCH DAMAGE. |
| 50 | * |
| 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.] */ |
| 55 | |
Adam Langley | 0113a4f | 2014-07-10 17:07:14 -0700 | [diff] [blame] | 56 | #if !defined(_BSD_SOURCE) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 57 | #define _BSD_SOURCE /* needed for strdup, snprintf, vprintf etc */ |
Adam Langley | 0113a4f | 2014-07-10 17:07:14 -0700 | [diff] [blame] | 58 | #endif |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 59 | |
| 60 | #include <openssl/mem.h> |
| 61 | |
| 62 | #include <assert.h> |
| 63 | #include <stdarg.h> |
| 64 | #include <stdio.h> |
| 65 | #include <string.h> |
| 66 | |
Adam Langley | ded9358 | 2014-07-31 15:23:51 -0700 | [diff] [blame] | 67 | #if defined(OPENSSL_WINDOWS) |
| 68 | #include <Windows.h> |
| 69 | #endif |
| 70 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 71 | |
| 72 | void *OPENSSL_realloc_clean(void *ptr, size_t old_size, size_t new_size) { |
| 73 | void *ret = NULL; |
| 74 | |
| 75 | if (ptr == NULL) { |
| 76 | return OPENSSL_malloc(new_size); |
| 77 | } |
| 78 | |
| 79 | if (new_size == 0) { |
| 80 | return NULL; |
| 81 | } |
| 82 | |
| 83 | /* We don't support shrinking the buffer. Note the memcpy that copies |
| 84 | * |old_size| bytes to the new buffer, below. */ |
| 85 | if (new_size < old_size) { |
| 86 | return NULL; |
| 87 | } |
| 88 | |
| 89 | ret = OPENSSL_malloc(new_size); |
| 90 | if (ret == NULL) { |
| 91 | return NULL; |
| 92 | } |
| 93 | |
| 94 | memcpy(ret, ptr, old_size); |
| 95 | OPENSSL_cleanse(ptr, old_size); |
| 96 | OPENSSL_free(ptr); |
| 97 | return ret; |
| 98 | } |
| 99 | |
Adam Langley | ad1907f | 2014-07-30 11:55:17 -0700 | [diff] [blame] | 100 | void OPENSSL_cleanse(void *ptr, size_t len) { |
Adam Langley | ded9358 | 2014-07-31 15:23:51 -0700 | [diff] [blame] | 101 | #if defined(OPENSSL_WINDOWS) |
| 102 | SecureZeroMemory(ptr, len); |
| 103 | #else |
| 104 | memset(ptr, 0, len); |
Adam Langley | ad1907f | 2014-07-30 11:55:17 -0700 | [diff] [blame] | 105 | |
Adam Langley | cf052cf | 2014-07-31 18:46:35 -0700 | [diff] [blame] | 106 | #if !defined(OPENSSL_NO_ASM) |
Adam Langley | ad1907f | 2014-07-30 11:55:17 -0700 | [diff] [blame] | 107 | /* As best as we can tell, this is sufficient to break any optimisations that |
| 108 | might try to eliminate "superfluous" memsets. If there's an easy way to |
| 109 | detect memset_s, it would be better to use that. */ |
Adam Langley | ad1907f | 2014-07-30 11:55:17 -0700 | [diff] [blame] | 110 | __asm__ __volatile__("" : : "r"(ptr) : "memory"); |
| 111 | #endif |
Adam Langley | cf052cf | 2014-07-31 18:46:35 -0700 | [diff] [blame] | 112 | #endif /* !OPENSSL_NO_ASM */ |
Adam Langley | ad1907f | 2014-07-30 11:55:17 -0700 | [diff] [blame] | 113 | } |
| 114 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 115 | int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len) { |
| 116 | size_t i; |
| 117 | const uint8_t *a = in_a; |
| 118 | const uint8_t *b = in_b; |
| 119 | uint8_t x = 0; |
| 120 | |
| 121 | for (i = 0; i < len; i++) { |
| 122 | x |= a[i] ^ b[i]; |
| 123 | } |
| 124 | |
| 125 | return x; |
| 126 | } |
| 127 | |
| 128 | uint32_t OPENSSL_hash32(const void *ptr, size_t len) { |
| 129 | /* These are the FNV-1a parameters for 32 bits. */ |
| 130 | static const uint32_t kPrime = 16777619u; |
| 131 | static const uint32_t kOffsetBasis = 2166136261u; |
| 132 | |
| 133 | const uint8_t *in = ptr; |
| 134 | size_t i; |
| 135 | uint32_t h = kOffsetBasis; |
| 136 | |
| 137 | for (i = 0; i < len; i++) { |
| 138 | h ^= in[i]; |
| 139 | h *= kPrime; |
| 140 | } |
| 141 | |
| 142 | return h; |
| 143 | } |
| 144 | |
| 145 | char *OPENSSL_strdup(const char *s) { return strdup(s); } |
| 146 | |
Adam Langley | 01797e3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 147 | size_t OPENSSL_strnlen(const char *s, size_t len) { |
| 148 | size_t i; |
| 149 | |
| 150 | for (i = 0; i < len; i++) { |
| 151 | if (s[i] == 0) { |
| 152 | return i; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | return len; |
| 157 | } |
| 158 | |
Adam Langley | b0d5fb6 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 159 | #if defined(OPENSSL_WINDOWS) |
| 160 | |
| 161 | int OPENSSL_strcasecmp(const char *a, const char *b) { |
Adam Langley | ded9358 | 2014-07-31 15:23:51 -0700 | [diff] [blame] | 162 | return _stricmp(a, b); |
Adam Langley | b0d5fb6 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) { |
| 166 | return _strnicmp(a, b, n); |
| 167 | } |
| 168 | |
| 169 | #else |
| 170 | |
| 171 | int OPENSSL_strcasecmp(const char *a, const char *b) { |
| 172 | return strcasecmp(a, b); |
| 173 | } |
| 174 | |
| 175 | int OPENSSL_strncasecmp(const char *a, const char *b, size_t n) { |
| 176 | return strncasecmp(a, b, n); |
| 177 | } |
| 178 | |
| 179 | #endif |
| 180 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 181 | int BIO_snprintf(char *buf, size_t n, const char *format, ...) { |
| 182 | va_list args; |
| 183 | int ret; |
| 184 | |
| 185 | va_start(args, format); |
| 186 | |
| 187 | ret = BIO_vsnprintf(buf, n, format, args); |
| 188 | |
| 189 | va_end(args); |
| 190 | return ret; |
| 191 | } |
| 192 | |
| 193 | int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args) { |
| 194 | return vsnprintf(buf, n, format, args); |
| 195 | } |