2 /* Written by Richard Levitte (levitte@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/dso.h>
64 DSO_METHOD *DSO_METHOD_dl(void)
72 /* Part of the hack in "dl_load" ... */
73 #define DSO_MAX_TRANSLATED_SIZE 256
75 static int dl_load(DSO *dso, const char *filename);
76 static int dl_unload(DSO *dso);
77 static void *dl_bind_var(DSO *dso, const char *symname);
78 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
80 static int dl_unbind_var(DSO *dso, char *symname, void *symptr);
81 static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
82 static int dl_init(DSO *dso);
83 static int dl_finish(DSO *dso);
85 static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
87 static DSO_METHOD dso_meth_dl = {
88 "OpenSSL 'dl' shared library method",
93 /* For now, "unbind" doesn't exist */
95 NULL, /* unbind_var */
96 NULL, /* unbind_func */
103 DSO_METHOD *DSO_METHOD_dl(void)
105 return(&dso_meth_dl);
108 /* For this DSO_METHOD, our meth_data STACK will contain;
109 * (i) the handle (shl_t) returned from shl_load().
110 * NB: I checked on HPUX11 and shl_t is itself a pointer
111 * type so the cast is safe.
114 static int dl_load(DSO *dso, const char *filename)
117 char translated[DSO_MAX_TRANSLATED_SIZE];
120 /* The same comment as in dlfcn_load applies here. bleurgh. */
121 len = strlen(filename);
122 if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
123 (len + 6 < DSO_MAX_TRANSLATED_SIZE) &&
124 (strstr(filename, "/") == NULL))
126 sprintf(translated, "lib%s.so", filename);
127 ptr = shl_load(translated, BIND_IMMEDIATE, NULL);
130 ptr = shl_load(filename, BIND_IMMEDIATE, NULL);
133 DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
136 if(!sk_push(dso->meth_data, (char *)ptr))
138 DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
145 static int dl_unload(DSO *dso)
150 DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
153 if(sk_num(dso->meth_data) < 1)
155 /* Is this statement legal? */
156 ptr = (shl_t)sk_pop(dso->meth_data);
159 DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
160 /* Should push the value back onto the stack in
161 * case of a retry. */
162 sk_push(dso->meth_data, (char *)ptr);
169 static void *dl_bind_var(DSO *dso, const char *symname)
174 if((dso == NULL) || (symname == NULL))
176 DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
179 if(sk_num(dso->meth_data) < 1)
181 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
184 ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
187 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
190 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
192 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
198 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
203 if((dso == NULL) || (symname == NULL))
205 DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
208 if(sk_num(dso->meth_data) < 1)
210 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
213 ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
216 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
219 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
221 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
224 return((DSO_FUNC_TYPE)sym);
227 static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg)
231 DSOerr(DSO_F_DL_CTRL,ERR_R_PASSED_NULL_PARAMETER);
236 case DSO_CTRL_GET_FLAGS:
238 case DSO_CTRL_SET_FLAGS:
239 dso->flags = (int)larg;
241 case DSO_CTRL_OR_FLAGS:
242 dso->flags |= (int)larg;
247 DSOerr(DSO_F_DL_CTRL,DSO_R_UNKNOWN_COMMAND);