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);
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);
84 static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
86 static char *dl_name_converter(DSO *dso, const char *filename);
88 static DSO_METHOD dso_meth_dl = {
89 "OpenSSL 'dl' shared library method",
94 /* For now, "unbind" doesn't exist */
96 NULL, /* unbind_var */
97 NULL, /* unbind_func */
105 DSO_METHOD *DSO_METHOD_dl(void)
107 return(&dso_meth_dl);
110 /* For this DSO_METHOD, our meth_data STACK will contain;
111 * (i) the handle (shl_t) returned from shl_load().
112 * NB: I checked on HPUX11 and shl_t is itself a pointer
113 * type so the cast is safe.
116 static int dl_load(DSO *dso)
119 /* We don't do any fancy retries or anything, just take the method's
120 * (or DSO's if it has the callback set) best translation of the
121 * platform-independant filename and try once with that. */
122 char *filename= DSO_convert_filename(dso, NULL);
126 DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);
129 ptr = shl_load(filename, BIND_IMMEDIATE, NULL);
132 DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
135 if(!sk_push(dso->meth_data, (char *)ptr))
137 DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
140 /* Success, stick the converted filename we've loaded under into the DSO
141 * (it also serves as the indicator that we are currently loaded). */
142 dso->loaded_filename = filename;
147 OPENSSL_free(filename);
153 static int dl_unload(DSO *dso)
158 DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
161 if(sk_num(dso->meth_data) < 1)
163 /* Is this statement legal? */
164 ptr = (shl_t)sk_pop(dso->meth_data);
167 DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
168 /* Should push the value back onto the stack in
169 * case of a retry. */
170 sk_push(dso->meth_data, (char *)ptr);
177 static void *dl_bind_var(DSO *dso, const char *symname)
182 if((dso == NULL) || (symname == NULL))
184 DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
187 if(sk_num(dso->meth_data) < 1)
189 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
192 ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
195 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
198 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
200 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
206 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
211 if((dso == NULL) || (symname == NULL))
213 DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
216 if(sk_num(dso->meth_data) < 1)
218 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
221 ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
224 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
227 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
229 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
232 return((DSO_FUNC_TYPE)sym);
235 /* This function is identical to the one in dso_dlfcn.c, but as it is highly
236 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at the
237 * same time, there's no great duplicating the code. Figuring out an elegant way
238 * to share one copy of the code would be more difficult and would not leave the
239 * implementations independant. */
240 static char *dl_name_converter(DSO *dso, const char *filename)
245 len = strlen(filename);
246 transform = (strstr(filename, "/") == NULL);
248 /* We will convert this to "lib%s.so" */
249 translated = OPENSSL_malloc(len + 7);
251 /* We will simply duplicate filename */
252 translated = OPENSSL_malloc(len + 1);
253 if(translated == NULL)
255 DSOerr(DSO_F_DL_NAME_CONVERTER,
256 DSO_R_NAME_TRANSLATION_FAILED);
260 sprintf(translated, "lib%s.so", filename);
262 sprintf(translated, "%s", filename);