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| 1 /* crypto/buffer/buffer.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include "cryptlib.h" | |
| 61 #include <openssl/buffer.h> | |
| 62 | |
| 63 /* LIMIT_BEFORE_EXPANSION is the maximum n such that (n+3)/3*4 < 2**31. That | |
| 64 * function is applied in several functions in this file and this limit ensures | |
| 65 * that the result fits in an int. */ | |
| 66 #define LIMIT_BEFORE_EXPANSION 0x5ffffffc | |
| 67 | |
| 68 BUF_MEM *BUF_MEM_new(void) | |
| 69 { | |
| 70 BUF_MEM *ret; | |
| 71 | |
| 72 ret=OPENSSL_malloc(sizeof(BUF_MEM)); | |
| 73 if (ret == NULL) | |
| 74 { | |
| 75 BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE); | |
| 76 return(NULL); | |
| 77 } | |
| 78 ret->length=0; | |
| 79 ret->max=0; | |
| 80 ret->data=NULL; | |
| 81 return(ret); | |
| 82 } | |
| 83 | |
| 84 void BUF_MEM_free(BUF_MEM *a) | |
| 85 { | |
| 86 if(a == NULL) | |
| 87 return; | |
| 88 | |
| 89 if (a->data != NULL) | |
| 90 { | |
| 91 memset(a->data,0,(unsigned int)a->max); | |
| 92 OPENSSL_free(a->data); | |
| 93 } | |
| 94 OPENSSL_free(a); | |
| 95 } | |
| 96 | |
| 97 int BUF_MEM_grow(BUF_MEM *str, size_t len) | |
| 98 { | |
| 99 char *ret; | |
| 100 size_t n; | |
| 101 | |
| 102 if (str->length >= len) | |
| 103 { | |
| 104 str->length=len; | |
| 105 return(len); | |
| 106 } | |
| 107 if (str->max >= len) | |
| 108 { | |
| 109 memset(&str->data[str->length],0,len-str->length); | |
| 110 str->length=len; | |
| 111 return(len); | |
| 112 } | |
| 113 /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */ | |
| 114 if (len > LIMIT_BEFORE_EXPANSION) | |
| 115 { | |
| 116 BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); | |
| 117 return 0; | |
| 118 } | |
| 119 n=(len+3)/3*4; | |
| 120 if (str->data == NULL) | |
| 121 ret=OPENSSL_malloc(n); | |
| 122 else | |
| 123 ret=OPENSSL_realloc(str->data,n); | |
| 124 if (ret == NULL) | |
| 125 { | |
| 126 BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); | |
| 127 len=0; | |
| 128 } | |
| 129 else | |
| 130 { | |
| 131 str->data=ret; | |
| 132 str->max=n; | |
| 133 memset(&str->data[str->length],0,len-str->length); | |
| 134 str->length=len; | |
| 135 } | |
| 136 return(len); | |
| 137 } | |
| 138 | |
| 139 int BUF_MEM_grow_clean(BUF_MEM *str, size_t len) | |
| 140 { | |
| 141 char *ret; | |
| 142 size_t n; | |
| 143 | |
| 144 if (str->length >= len) | |
| 145 { | |
| 146 memset(&str->data[len],0,str->length-len); | |
| 147 str->length=len; | |
| 148 return(len); | |
| 149 } | |
| 150 if (str->max >= len) | |
| 151 { | |
| 152 memset(&str->data[str->length],0,len-str->length); | |
| 153 str->length=len; | |
| 154 return(len); | |
| 155 } | |
| 156 /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */ | |
| 157 if (len > LIMIT_BEFORE_EXPANSION) | |
| 158 { | |
| 159 BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE); | |
| 160 return 0; | |
| 161 } | |
| 162 n=(len+3)/3*4; | |
| 163 if (str->data == NULL) | |
| 164 ret=OPENSSL_malloc(n); | |
| 165 else | |
| 166 ret=OPENSSL_realloc_clean(str->data,str->max,n); | |
| 167 if (ret == NULL) | |
| 168 { | |
| 169 BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE); | |
| 170 len=0; | |
| 171 } | |
| 172 else | |
| 173 { | |
| 174 str->data=ret; | |
| 175 str->max=n; | |
| 176 memset(&str->data[str->length],0,len-str->length); | |
| 177 str->length=len; | |
| 178 } | |
| 179 return(len); | |
| 180 } | |
| 181 | |
| 182 void BUF_reverse(unsigned char *out, unsigned char *in, size_t size) | |
| 183 { | |
| 184 size_t i; | |
| 185 if (in) | |
| 186 { | |
| 187 out += size - 1; | |
| 188 for (i = 0; i < size; i++) | |
| 189 *in++ = *out--; | |
| 190 } | |
| 191 else | |
| 192 { | |
| 193 unsigned char *q; | |
| 194 char c; | |
| 195 q = out + size - 1; | |
| 196 for (i = 0; i < size/2; i++) | |
| 197 { | |
| 198 c = *q; | |
| 199 *q-- = *out; | |
| 200 *out++ = c; | |
| 201 } | |
| 202 } | |
| 203 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master