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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 "buffer.h"
62#include "bio.h"
63#include "lhash.h"
64#include "cryptlib.h"
65
66int CRYPTO_get_ex_new_index(idx,skp,argl,argp,new_func,dup_func,free_func)
67int idx;
68STACK **skp;
69long argl;
70char *argp;
71int (*new_func)();
72int (*dup_func)();
73void (*free_func)();
74 {
75 CRYPTO_EX_DATA_FUNCS *a;
76
77 if (*skp == NULL)
78 *skp=sk_new_null();
79 if (*skp == NULL)
80 {
81 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE);
82 return(-1);
83 }
84 a=(CRYPTO_EX_DATA_FUNCS *)Malloc(sizeof(CRYPTO_EX_DATA_FUNCS));
85 if (a == NULL)
86 {
87 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE);
88 return(-1);
89 }
90 a->argl=argl;
91 a->argp=argp;
92 a->new_func=new_func;
93 a->dup_func=dup_func;
94 a->free_func=free_func;
95 while (sk_num(*skp) <= idx)
96 {
97 if (!sk_push(*skp,NULL))
98 {
99 CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,ERR_R_MALLOC_FAILURE);
100 Free(a);
101 return(-1);
102 }
103 }
104 sk_value(*skp,idx)=(char *)a;
105 return(idx);
106 }
107
108int CRYPTO_set_ex_data(ad,idx,val)
109CRYPTO_EX_DATA *ad;
110int idx;
111char *val;
112 {
113 int i;
114
115 if (ad->sk == NULL)
116 {
117 if ((ad->sk=sk_new_null()) == NULL)
118 {
119 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE);
120 return(0);
121 }
122 }
123 i=sk_num(ad->sk);
124
125 while (i <= idx)
126 {
127 if (!sk_push(ad->sk,NULL))
128 {
129 CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA,ERR_R_MALLOC_FAILURE);
130 return(0);
131 }
132 i++;
133 }
134 sk_value(ad->sk,idx)=val;
135 return(1);
136 }
137
138char *CRYPTO_get_ex_data(ad,idx)
139CRYPTO_EX_DATA *ad;
140int idx;
141 {
142 if (ad->sk == NULL)
143 return(0);
144 else if (idx >= sk_num(ad->sk))
145 return(0);
146 else
147 return(sk_value(ad->sk,idx));
148 }
149
150/* The callback is called with the 'object', which is the origional data object
151 * being duplicated, a pointer to the
152 * 'new' object to be inserted, the index, and the argi/argp
153 */
154int CRYPTO_dup_ex_data(meth,to,from)
155STACK *meth;
156CRYPTO_EX_DATA *to,*from;
157 {
158 int i,j,m,r;
159 CRYPTO_EX_DATA_FUNCS *mm;
160 char *from_d;
161
162 if (meth == NULL) return(1);
163 if (from->sk == NULL) return(1);
164 m=sk_num(meth);
165 j=sk_num(from->sk);
166 for (i=0; i<j; i++)
167 {
168 from_d=CRYPTO_get_ex_data(from,i);
169 if (i < m)
170 {
171 mm=(CRYPTO_EX_DATA_FUNCS *)sk_value(meth,i);
172 if (mm->dup_func != NULL)
173 r=mm->dup_func(to,from,(char **)&from_d,i,
174 mm->argl,mm->argp);
175 }
176 CRYPTO_set_ex_data(to,i,from_d);
177 }
178 return(1);
179 }
180
181/* Call each free callback */
182void CRYPTO_free_ex_data(meth,obj,ad)
183STACK *meth;
184char *obj;
185CRYPTO_EX_DATA *ad;
186 {
187 CRYPTO_EX_DATA_FUNCS *m;
188 char *ptr;
189 int i,max;
190
191 if (meth != NULL)
192 {
193 max=sk_num(meth);
194 for (i=0; i<max; i++)
195 {
196 m=(CRYPTO_EX_DATA_FUNCS *)sk_value(meth,i);
197 if ((m != NULL) && (m->free_func != NULL))
198 {
199 ptr=CRYPTO_get_ex_data(ad,i);
200 m->free_func(obj,ptr,ad,i,m->argl,m->argp);
201 }
202 }
203 }
204 if (ad->sk != NULL)
205 {
206 sk_free(ad->sk);
207 ad->sk=NULL;
208 }
209 }
210
211void CRYPTO_new_ex_data(meth,obj,ad)
212STACK *meth;
213char *obj;
214CRYPTO_EX_DATA *ad;
215 {
216 CRYPTO_EX_DATA_FUNCS *m;
217 char *ptr;
218 int i,max;
219
220 ad->sk=NULL;
221 if (meth != NULL)
222 {
223 max=sk_num(meth);
224 for (i=0; i<max; i++)
225 {
226 m=(CRYPTO_EX_DATA_FUNCS *)sk_value(meth,i);
227 if ((m != NULL) && (m->new_func != NULL))
228 {
229 ptr=CRYPTO_get_ex_data(ad,i);
230 m->new_func(obj,ptr,ad,i,m->argl,m->argp);
231 }
232 }
233 }
234 }
235
236
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