1 | /* crypto/mem.c */
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2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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3 | * All rights reserved.
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4 | *
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5 | * This package is an SSL implementation written
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6 | * by Eric Young (eay@cryptsoft.com).
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7 | * The implementation was written so as to conform with Netscapes SSL.
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8 | *
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9 | * This library is free for commercial and non-commercial use as long as
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10 | * the following conditions are aheared to. The following conditions
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11 | * apply to all code found in this distribution, be it the RC4, RSA,
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12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation
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13 | * included with this distribution is covered by the same copyright terms
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14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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15 | *
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16 | * Copyright remains Eric Young's, and as such any Copyright notices in
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17 | * the code are not to be removed.
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18 | * If this package is used in a product, Eric Young should be given attribution
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19 | * as the author of the parts of the library used.
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20 | * This can be in the form of a textual message at program startup or
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21 | * in documentation (online or textual) provided with the package.
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22 | *
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23 | * Redistribution and use in source and binary forms, with or without
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24 | * modification, are permitted provided that the following conditions
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25 | * are met:
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26 | * 1. Redistributions of source code must retain the copyright
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27 | * notice, this list of conditions and the following disclaimer.
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28 | * 2. Redistributions in binary form must reproduce the above copyright
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29 | * notice, this list of conditions and the following disclaimer in the
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30 | * documentation and/or other materials provided with the distribution.
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31 | * 3. All advertising materials mentioning features or use of this software
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32 | * must display the following acknowledgement:
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33 | * "This product includes cryptographic software written by
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34 | * Eric Young (eay@cryptsoft.com)"
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35 | * The word 'cryptographic' can be left out if the rouines from the library
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36 | * being used are not cryptographic related :-).
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37 | * 4. If you include any Windows specific code (or a derivative thereof) from
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38 | * the apps directory (application code) you must include an acknowledgement:
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39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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40 | *
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41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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51 | * SUCH DAMAGE.
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52 | *
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53 | * The licence and distribution terms for any publically available version or
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54 | * derivative of this code cannot be changed. i.e. this code cannot simply be
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55 | * copied and put under another distribution licence
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56 | * [including the GNU Public Licence.]
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57 | */
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58 |
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59 | #include <stdio.h>
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60 | #include <stdlib.h>
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61 | #include "openssl_mods.h"
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62 |
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63 |
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64 | static int allow_customize = 1; /* we provide flexible functions for */
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65 | static int allow_customize_debug = 1;/* exchanging memory-related functions at
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66 | * run-time, but this must be done
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67 | * before any blocks are actually
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68 | * allocated; or we'll run into huge
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69 | * problems when malloc/free pairs
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70 | * don't match etc. */
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71 |
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72 | /* may be changed as long as `allow_customize' is set */
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73 | static void *(*malloc_locked_func)(size_t) = malloc;
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74 | static void (*free_locked_func)(void *) = free;
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75 | static void *(*malloc_func)(size_t) = malloc;
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76 | static void *(*realloc_func)(void *, size_t)= realloc;
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77 | static void (*free_func)(void *) = free;
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78 |
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79 | /* may be changed as long as `allow_customize_debug' is set */
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80 | /* XXX use correct function pointer types */
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81 | #ifdef CRYPTO_MDEBUG
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82 | /* use default functions from mem_dbg.c */
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83 | static void (*malloc_debug_func)(void *,int,const char *,int,int)
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84 | = CRYPTO_dbg_malloc;
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85 | static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
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86 | = CRYPTO_dbg_realloc;
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87 | static void (*free_debug_func)(void *,int) = CRYPTO_dbg_free;
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88 | static void (*set_debug_options_func)(long) = CRYPTO_dbg_set_options;
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89 | static long (*get_debug_options_func)(void) = CRYPTO_dbg_get_options;
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90 | #else
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91 | /* applications can use CRYPTO_malloc_debug_init() to select above case
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92 | * at run-time */
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93 | static void (*malloc_debug_func)(void *,int,const char *,int,int) = NULL;
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94 | static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
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95 | = NULL;
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96 | static void (*free_debug_func)(void *,int) = NULL;
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97 | static void (*set_debug_options_func)(long) = NULL;
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98 | static long (*get_debug_options_func)(void) = NULL;
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99 | #endif
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100 |
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101 |
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102 | int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
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103 | void (*f)(void *))
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104 | {
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105 | if (!allow_customize)
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106 | return 0;
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107 | if ((m == NULL) || (r == NULL) || (f == NULL))
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108 | return 0;
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109 | malloc_func=m;
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110 | realloc_func=r;
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111 | free_func=f;
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112 | malloc_locked_func=m;
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113 | free_locked_func=f;
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114 | return 1;
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115 | }
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116 |
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117 | int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
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118 | {
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119 | if (!allow_customize)
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120 | return 0;
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121 | if ((m == NULL) || (f == NULL))
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122 | return 0;
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123 | malloc_locked_func=m;
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124 | free_locked_func=f;
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125 | return 1;
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126 | }
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127 |
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128 | int CRYPTO_set_mem_debug_functions(void (*m)(void *,int,const char *,int,int),
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129 | void (*r)(void *,void *,int,const char *,int,int),
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130 | void (*f)(void *,int),
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131 | void (*so)(long),
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132 | long (*go)(void))
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133 | {
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134 | if (!allow_customize_debug)
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135 | return 0;
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136 | malloc_debug_func=m;
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137 | realloc_debug_func=r;
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138 | free_debug_func=f;
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139 | set_debug_options_func=so;
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140 | get_debug_options_func=go;
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141 | return 1;
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142 | }
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143 |
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144 | void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
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145 | void (**f)(void *))
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146 | {
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147 | if (m != NULL) *m=malloc_func;
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148 | if (r != NULL) *r=realloc_func;
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149 | if (f != NULL) *f=free_func;
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150 | }
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151 |
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152 | void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
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153 | {
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154 | if (m != NULL) *m=malloc_locked_func;
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155 | if (f != NULL) *f=free_locked_func;
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156 | }
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157 |
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158 | void CRYPTO_get_mem_debug_functions(void (**m)(void *,int,const char *,int,int),
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159 | void (**r)(void *,void *,int,const char *,int,int),
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160 | void (**f)(void *,int),
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161 | void (**so)(long),
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162 | long (**go)(void))
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163 | {
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164 | if (m != NULL) *m=malloc_debug_func;
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165 | if (r != NULL) *r=realloc_debug_func;
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166 | if (f != NULL) *f=free_debug_func;
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167 | if (so != NULL) *so=set_debug_options_func;
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168 | if (go != NULL) *go=get_debug_options_func;
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169 | }
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170 |
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171 |
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172 | void *CRYPTO_malloc_locked(int num, const char *file, int line)
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173 | {
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174 | void *ret = NULL;
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175 |
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176 | allow_customize = 0;
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177 | if (malloc_debug_func != NULL)
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178 | {
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179 | allow_customize_debug = 0;
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180 | malloc_debug_func(NULL, num, file, line, 0);
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181 | }
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182 | ret = malloc_locked_func(num);
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183 | #ifdef LEVITTE_DEBUG
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184 | fprintf(stderr, "LEVITTE_DEBUG: > 0x%p (%d)\n", ret, num);
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185 | #endif
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186 | if (malloc_debug_func != NULL)
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187 | malloc_debug_func(ret, num, file, line, 1);
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188 |
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189 | return ret;
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190 | }
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191 |
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192 | void CRYPTO_free_locked(void *str)
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193 | {
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194 | if (free_debug_func != NULL)
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195 | free_debug_func(str, 0);
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196 | #ifdef LEVITTE_DEBUG
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197 | fprintf(stderr, "LEVITTE_DEBUG: < 0x%p\n", str);
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198 | #endif
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199 | free_locked_func(str);
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200 | if (free_debug_func != NULL)
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201 | free_debug_func(NULL, 1);
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202 | }
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203 |
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204 | void *CRYPTO_malloc(int num, const char *file, int line)
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205 | {
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206 | void *ret = NULL;
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207 |
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208 | allow_customize = 0;
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209 | if (malloc_debug_func != NULL)
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210 | {
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211 | allow_customize_debug = 0;
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212 | malloc_debug_func(NULL, num, file, line, 0);
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213 | }
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214 | ret = malloc_func(num);
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215 | #ifdef LEVITTE_DEBUG
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216 | fprintf(stderr, "LEVITTE_DEBUG: > 0x%p (%d)\n", ret, num);
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217 | #endif
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218 | if (malloc_debug_func != NULL)
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219 | malloc_debug_func(ret, num, file, line, 1);
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220 |
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221 | return ret;
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222 | }
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223 |
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224 | void *CRYPTO_realloc(void *str, int num, const char *file, int line)
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225 | {
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226 | void *ret = NULL;
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227 |
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228 | if (realloc_debug_func != NULL)
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229 | realloc_debug_func(str, NULL, num, file, line, 0);
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230 | ret = realloc_func(str,num);
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231 | #ifdef LEVITTE_DEBUG
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232 | fprintf(stderr, "LEVITTE_DEBUG: | 0x%p -> 0x%p (%d)\n", str, ret, num);
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233 | #endif
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234 | if (realloc_debug_func != NULL)
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235 | realloc_debug_func(str, ret, num, file, line, 1);
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236 |
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237 | return ret;
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238 | }
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239 |
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240 | void CRYPTO_free(void *str)
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241 | {
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242 | if (free_debug_func != NULL)
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243 | free_debug_func(str, 0);
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244 | #ifdef LEVITTE_DEBUG
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245 | fprintf(stderr, "LEVITTE_DEBUG: < 0x%p\n", str);
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246 | #endif
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247 | free_func(str);
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248 | if (free_debug_func != NULL)
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249 | free_debug_func(NULL, 1);
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250 | }
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251 |
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252 | void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
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253 | {
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254 | if (a != NULL) OPENSSL_free(a);
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255 | a=(char *)OPENSSL_malloc(num);
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256 | return(a);
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257 | }
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258 |
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259 |
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260 | void CRYPTO_set_mem_debug_options(long bits)
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261 | {
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262 | if (set_debug_options_func != NULL)
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263 | set_debug_options_func(bits);
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264 | }
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265 |
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266 | long CRYPTO_get_mem_debug_options(void)
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267 | {
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268 | if (get_debug_options_func != NULL)
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269 | return get_debug_options_func();
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270 | return 0;
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271 | }
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