ex_data.c revision 55714
1/* crypto/ex_data.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 <stdlib.h> 61#include <openssl/buffer.h> 62#include <openssl/bio.h> 63#include <openssl/lhash.h> 64#include "cryptlib.h" 65 66int CRYPTO_get_ex_new_index(int idx, STACK **skp, long argl, char *argp, 67 int (*new_func)(), int (*dup_func)(), void (*free_func)()) 68 { 69 int ret= -1; 70 CRYPTO_EX_DATA_FUNCS *a; 71 72 MemCheck_off(); 73 if (*skp == NULL) 74 *skp=sk_new_null(); 75 if (*skp == NULL) 76 { 77 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE); 78 goto err; 79 } 80 a=(CRYPTO_EX_DATA_FUNCS *)Malloc(sizeof(CRYPTO_EX_DATA_FUNCS)); 81 if (a == NULL) 82 { 83 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE); 84 goto err; 85 } 86 a->argl=argl; 87 a->argp=argp; 88 a->new_func=new_func; 89 a->dup_func=dup_func; 90 a->free_func=free_func; 91 while (sk_num(*skp) <= idx) 92 { 93 if (!sk_push(*skp,NULL)) 94 { 95 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE); 96 Free(a); 97 goto err; 98 } 99 } 100 sk_set(*skp,idx, (char *)a); 101 ret=idx; 102err: 103 MemCheck_on(); 104 return(idx); 105 } 106 107int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, char *val) 108 { 109 int i; 110 111 if (ad->sk == NULL) 112 { 113 if ((ad->sk=sk_new_null()) == NULL) 114 { 115 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE); 116 return(0); 117 } 118 } 119 i=sk_num(ad->sk); 120 121 while (i <= idx) 122 { 123 if (!sk_push(ad->sk,NULL)) 124 { 125 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE); 126 return(0); 127 } 128 i++; 129 } 130 sk_set(ad->sk,idx,val); 131 return(1); 132 } 133 134char *CRYPTO_get_ex_data(CRYPTO_EX_DATA *ad, int idx) 135 { 136 if (ad->sk == NULL) 137 return(0); 138 else if (idx >= sk_num(ad->sk)) 139 return(0); 140 else 141 return(sk_value(ad->sk,idx)); 142 } 143 144/* The callback is called with the 'object', which is the original data object 145 * being duplicated, a pointer to the 146 * 'new' object to be inserted, the index, and the argi/argp 147 */ 148int CRYPTO_dup_ex_data(STACK *meth, CRYPTO_EX_DATA *to, 149 CRYPTO_EX_DATA *from) 150 { 151 int i,j,m,r; 152 CRYPTO_EX_DATA_FUNCS *mm; 153 char *from_d; 154 155 if (meth == NULL) return(1); 156 if (from->sk == NULL) return(1); 157 m=sk_num(meth); 158 j=sk_num(from->sk); 159 for (i=0; i<j; i++) 160 { 161 from_d=CRYPTO_get_ex_data(from,i); 162 if (i < m) 163 { 164 mm=(CRYPTO_EX_DATA_FUNCS *)sk_value(meth,i); 165 if (mm->dup_func != NULL) 166 r=mm->dup_func(to,from,(char **)&from_d,i, 167 mm->argl,mm->argp); 168 } 169 CRYPTO_set_ex_data(to,i,from_d); 170 } 171 return(1); 172 } 173 174/* Call each free callback */ 175void CRYPTO_free_ex_data(STACK *meth, char *obj, CRYPTO_EX_DATA *ad) 176 { 177 CRYPTO_EX_DATA_FUNCS *m; 178 char *ptr; 179 int i,max; 180 181 if (meth != NULL) 182 { 183 max=sk_num(meth); 184 for (i=0; i<max; i++) 185 { 186 m=(CRYPTO_EX_DATA_FUNCS *)sk_value(meth,i); 187 if ((m != NULL) && (m->free_func != NULL)) 188 { 189 ptr=CRYPTO_get_ex_data(ad,i); 190 m->free_func(obj,ptr,ad,i,m->argl,m->argp); 191 } 192 } 193 } 194 if (ad->sk != NULL) 195 { 196 sk_free(ad->sk); 197 ad->sk=NULL; 198 } 199 } 200 201void CRYPTO_new_ex_data(STACK *meth, char *obj, CRYPTO_EX_DATA *ad) 202 { 203 CRYPTO_EX_DATA_FUNCS *m; 204 char *ptr; 205 int i,max; 206 207 ad->sk=NULL; 208 if (meth != NULL) 209 { 210 max=sk_num(meth); 211 for (i=0; i<max; i++) 212 { 213 m=(CRYPTO_EX_DATA_FUNCS *)sk_value(meth,i); 214 if ((m != NULL) && (m->new_func != NULL)) 215 { 216 ptr=CRYPTO_get_ex_data(ad,i); 217 m->new_func(obj,ptr,ad,i,m->argl,m->argp); 218 } 219 } 220 } 221 } 222 223 224