2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) 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_dlfcn(void)
74 /* Part of the hack in "dlfcn_load" ... */
75 #define DSO_MAX_TRANSLATED_SIZE 256
77 static int dlfcn_load(DSO *dso);
78 static int dlfcn_unload(DSO *dso);
79 static void *dlfcn_bind_var(DSO *dso, const char *symname);
80 static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
82 static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
83 static int dlfcn_init(DSO *dso);
84 static int dlfcn_finish(DSO *dso);
85 static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
87 static char *dlfcn_name_converter(DSO *dso, const char *filename);
89 static DSO_METHOD dso_meth_dlfcn = {
90 "OpenSSL 'dlfcn' shared library method",
95 /* For now, "unbind" doesn't exist */
97 NULL, /* unbind_var */
98 NULL, /* unbind_func */
101 dlfcn_name_converter,
106 DSO_METHOD *DSO_METHOD_dlfcn(void)
108 return(&dso_meth_dlfcn);
111 /* Prior to using the dlopen() function, we should decide on the flag
112 * we send. There's a few different ways of doing this and it's a
113 * messy venn-diagram to match up which platforms support what. So
114 * as we don't have autoconf yet, I'm implementing a hack that could
115 * be hacked further relatively easily to deal with cases as we find
116 * them. Initially this is to cope with OpenBSD. */
119 # define DLOPEN_FLAG DL_LAZY
122 # define DLOPEN_FLAG RTLD_NOW
124 # define DLOPEN_FLAG 0
128 # define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
131 /* For this DSO_METHOD, our meth_data STACK will contain;
132 * (i) the handle (void*) returned from dlopen().
135 static int dlfcn_load(DSO *dso)
138 /* See applicable comments in dso_dl.c */
139 char *filename = DSO_convert_filename(dso, NULL);
143 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_NO_FILENAME);
146 ptr = dlopen(filename, DLOPEN_FLAG);
149 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
150 ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
153 if(!sk_push(dso->meth_data, (char *)ptr))
155 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
159 dso->loaded_filename = filename;
164 OPENSSL_free(filename);
170 static int dlfcn_unload(DSO *dso)
175 DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
178 if(sk_num(dso->meth_data) < 1)
180 ptr = (void *)sk_pop(dso->meth_data);
183 DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_NULL_HANDLE);
184 /* Should push the value back onto the stack in
185 * case of a retry. */
186 sk_push(dso->meth_data, (char *)ptr);
189 /* For now I'm not aware of any errors associated with dlclose() */
194 static void *dlfcn_bind_var(DSO *dso, const char *symname)
198 if((dso == NULL) || (symname == NULL))
200 DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
203 if(sk_num(dso->meth_data) < 1)
205 DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
208 ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
211 DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
214 sym = dlsym(ptr, symname);
217 DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
218 ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
224 static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
229 if((dso == NULL) || (symname == NULL))
231 DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
234 if(sk_num(dso->meth_data) < 1)
236 DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
239 ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
242 DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
245 sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
248 DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
249 ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
255 static char *dlfcn_name_converter(DSO *dso, const char *filename)
258 int len, rsize, transform;
260 len = strlen(filename);
262 transform = (strstr(filename, "/") == NULL);
265 /* We will convert this to "%s.so" or "lib%s.so" */
266 rsize += 3; /* The length of ".so" */
267 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
268 rsize += 3; /* The length of "lib" */
270 translated = OPENSSL_malloc(rsize);
271 if(translated == NULL)
273 DSOerr(DSO_F_DLFCN_NAME_CONVERTER,
274 DSO_R_NAME_TRANSLATION_FAILED);
279 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
280 sprintf(translated, "lib%s.so", filename);
282 sprintf(translated, "%s.so", filename);
285 sprintf(translated, "%s", filename);
289 #endif /* DSO_DLFCN */