1 | /* memory.c
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2 | *
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3 | * Copyright (C) 2006-2015 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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20 | */
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21 |
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22 | #ifdef HAVE_CONFIG_H
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23 | #include <config.h>
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24 | #endif
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25 |
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26 | #include <wolfssl/wolfcrypt/settings.h>
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27 |
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28 | /* check old macros @wc_fips */
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29 | #if defined(USE_CYASSL_MEMORY) && !defined(USE_WOLFSSL_MEMORY)
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30 | #define USE_WOLFSSL_MEMORY
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31 | #endif
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32 | #if defined(CYASSL_MALLOC_CHECK) && !defined(WOLFSSL_MALLOC_CHECK)
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33 | #define WOLFSSL_MALLOC_CHECK
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34 | #endif
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35 |
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36 | #ifdef USE_WOLFSSL_MEMORY
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37 |
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38 | #include <wolfssl/wolfcrypt/memory.h>
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39 | #include <wolfssl/wolfcrypt/error-crypt.h>
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40 |
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41 | #ifdef WOLFSSL_MALLOC_CHECK
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42 | #include <stdio.h>
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43 | #endif
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44 |
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45 | /* Set these to default values initially. */
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46 | static wolfSSL_Malloc_cb malloc_function = 0;
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47 | static wolfSSL_Free_cb free_function = 0;
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48 | static wolfSSL_Realloc_cb realloc_function = 0;
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49 |
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50 | int wolfSSL_SetAllocators(wolfSSL_Malloc_cb mf,
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51 | wolfSSL_Free_cb ff,
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52 | wolfSSL_Realloc_cb rf)
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53 | {
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54 | int res = 0;
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55 |
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56 | if (mf)
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57 | malloc_function = mf;
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58 | else
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59 | res = BAD_FUNC_ARG;
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60 |
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61 | if (ff)
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62 | free_function = ff;
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63 | else
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64 | res = BAD_FUNC_ARG;
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65 |
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66 | if (rf)
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67 | realloc_function = rf;
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68 | else
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69 | res = BAD_FUNC_ARG;
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70 |
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71 | return res;
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72 | }
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73 |
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74 |
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75 | void* wolfSSL_Malloc(size_t size)
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76 | {
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77 | void* res = 0;
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78 |
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79 | if (malloc_function)
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80 | res = malloc_function(size);
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81 | else
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82 | res = malloc(size);
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83 |
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84 | #ifdef WOLFSSL_MALLOC_CHECK
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85 | if (res == NULL)
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86 | puts("wolfSSL_malloc failed");
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87 | #endif
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88 |
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89 | return res;
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90 | }
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91 |
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92 | void wolfSSL_Free(void *ptr)
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93 | {
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94 | if (free_function)
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95 | free_function(ptr);
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96 | else
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97 | free(ptr);
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98 | }
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99 |
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100 | void* wolfSSL_Realloc(void *ptr, size_t size)
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101 | {
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102 | void* res = 0;
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103 |
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104 | if (realloc_function)
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105 | res = realloc_function(ptr, size);
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106 | else
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107 | res = realloc(ptr, size);
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108 |
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109 | return res;
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110 | }
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111 |
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112 | #endif /* USE_WOLFSSL_MEMORY */
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113 |
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114 |
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115 | #ifdef HAVE_IO_POOL
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116 |
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117 | /* Example for user io pool, shared build may need definitions in lib proper */
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118 |
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119 | #include <wolfssl/wolfcrypt/types.h>
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120 | #include <stdlib.h>
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121 |
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122 | #ifndef HAVE_THREAD_LS
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123 | #error "Oops, simple I/O pool example needs thread local storage"
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124 | #endif
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125 |
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126 |
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127 | /* allow simple per thread in and out pools */
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128 | /* use 17k size sense max record size is 16k plus overhead */
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129 | static THREAD_LS_T byte pool_in[17*1024];
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130 | static THREAD_LS_T byte pool_out[17*1024];
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131 |
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132 |
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133 | void* XMALLOC(size_t n, void* heap, int type)
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134 | {
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135 | (void)heap;
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136 |
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137 | if (type == DYNAMIC_TYPE_IN_BUFFER) {
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138 | if (n < sizeof(pool_in))
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139 | return pool_in;
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140 | else
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141 | return NULL;
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142 | }
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143 |
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144 | if (type == DYNAMIC_TYPE_OUT_BUFFER) {
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145 | if (n < sizeof(pool_out))
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146 | return pool_out;
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147 | else
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148 | return NULL;
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149 | }
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150 |
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151 | return malloc(n);
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152 | }
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153 |
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154 | void* XREALLOC(void *p, size_t n, void* heap, int type)
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155 | {
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156 | (void)heap;
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157 |
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158 | if (type == DYNAMIC_TYPE_IN_BUFFER) {
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159 | if (n < sizeof(pool_in))
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160 | return pool_in;
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161 | else
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162 | return NULL;
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163 | }
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164 |
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165 | if (type == DYNAMIC_TYPE_OUT_BUFFER) {
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166 | if (n < sizeof(pool_out))
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167 | return pool_out;
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168 | else
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169 | return NULL;
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170 | }
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171 |
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172 | return realloc(p, n);
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173 | }
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174 |
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175 |
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176 | /* unit api calls, let's make sure visible with WOLFSSL_API */
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177 | WOLFSSL_API void XFREE(void *p, void* heap, int type)
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178 | {
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179 | (void)heap;
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180 |
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181 | if (type == DYNAMIC_TYPE_IN_BUFFER)
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182 | return; /* do nothing, static pool */
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183 |
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184 | if (type == DYNAMIC_TYPE_OUT_BUFFER)
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185 | return; /* do nothing, static pool */
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186 |
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187 | free(p);
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188 | }
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189 |
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190 | #endif /* HAVE_IO_POOL */
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191 |
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