1 /* dso_dl.c */
2 /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
3 * project 2000.
4 */
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
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).
56 *
57 */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/dso.h>
62
63 #ifndef DSO_DL
DSO_METHOD_dl(void)64 DSO_METHOD *DSO_METHOD_dl(void)
65 {
66 return NULL;
67 }
68 #else
69
70 #include <dl.h>
71
72 /* Part of the hack in "dl_load" ... */
73 #define DSO_MAX_TRANSLATED_SIZE 256
74
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);
79 #if 0
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);
85 #endif
86 static char *dl_name_converter(DSO *dso, const char *filename);
87
88 static DSO_METHOD dso_meth_dl = {
89 "OpenSSL 'dl' shared library method",
90 dl_load,
91 dl_unload,
92 dl_bind_var,
93 dl_bind_func,
94 /* For now, "unbind" doesn't exist */
95 #if 0
96 NULL, /* unbind_var */
97 NULL, /* unbind_func */
98 #endif
99 NULL, /* ctrl */
100 dl_name_converter,
101 NULL, /* init */
102 NULL /* finish */
103 };
104
DSO_METHOD_dl(void)105 DSO_METHOD *DSO_METHOD_dl(void)
106 {
107 return(&dso_meth_dl);
108 }
109
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.
114 */
115
dl_load(DSO * dso)116 static int dl_load(DSO *dso)
117 {
118 shl_t ptr = NULL;
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);
123
124 if(filename == NULL)
125 {
126 DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);
127 goto err;
128 }
129 ptr = shl_load(filename, BIND_IMMEDIATE |
130 (dso->flags&DSO_FLAG_NO_NAME_TRANSLATION?0:DYNAMIC_PATH), 0L);
131 if(ptr == NULL)
132 {
133 DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
134 ERR_add_error_data(4, "filename(", filename, "): ",
135 strerror(errno));
136 goto err;
137 }
138 if(!sk_push(dso->meth_data, (char *)ptr))
139 {
140 DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
141 goto err;
142 }
143 /* Success, stick the converted filename we've loaded under into the DSO
144 * (it also serves as the indicator that we are currently loaded). */
145 dso->loaded_filename = filename;
146 return(1);
147 err:
148 /* Cleanup! */
149 if(filename != NULL)
150 OPENSSL_free(filename);
151 if(ptr != NULL)
152 shl_unload(ptr);
153 return(0);
154 }
155
dl_unload(DSO * dso)156 static int dl_unload(DSO *dso)
157 {
158 shl_t ptr;
159 if(dso == NULL)
160 {
161 DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
162 return(0);
163 }
164 if(sk_num(dso->meth_data) < 1)
165 return(1);
166 /* Is this statement legal? */
167 ptr = (shl_t)sk_pop(dso->meth_data);
168 if(ptr == NULL)
169 {
170 DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
171 /* Should push the value back onto the stack in
172 * case of a retry. */
173 sk_push(dso->meth_data, (char *)ptr);
174 return(0);
175 }
176 shl_unload(ptr);
177 return(1);
178 }
179
dl_bind_var(DSO * dso,const char * symname)180 static void *dl_bind_var(DSO *dso, const char *symname)
181 {
182 shl_t ptr;
183 void *sym;
184
185 if((dso == NULL) || (symname == NULL))
186 {
187 DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
188 return(NULL);
189 }
190 if(sk_num(dso->meth_data) < 1)
191 {
192 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
193 return(NULL);
194 }
195 ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
196 if(ptr == NULL)
197 {
198 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
199 return(NULL);
200 }
201 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
202 {
203 DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
204 ERR_add_error_data(4, "symname(", symname, "): ",
205 strerror(errno));
206 return(NULL);
207 }
208 return(sym);
209 }
210
dl_bind_func(DSO * dso,const char * symname)211 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
212 {
213 shl_t ptr;
214 void *sym;
215
216 if((dso == NULL) || (symname == NULL))
217 {
218 DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
219 return(NULL);
220 }
221 if(sk_num(dso->meth_data) < 1)
222 {
223 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
224 return(NULL);
225 }
226 ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
227 if(ptr == NULL)
228 {
229 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
230 return(NULL);
231 }
232 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
233 {
234 DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
235 ERR_add_error_data(4, "symname(", symname, "): ",
236 strerror(errno));
237 return(NULL);
238 }
239 return((DSO_FUNC_TYPE)sym);
240 }
241
242 /* This function is identical to the one in dso_dlfcn.c, but as it is highly
243 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at the
244 * same time, there's no great duplicating the code. Figuring out an elegant
245 * way to share one copy of the code would be more difficult and would not
246 * leave the implementations independant. */
247 #if defined(__hpux)
248 static const char extension[] = ".sl";
249 #else
250 static const char extension[] = ".so";
251 #endif
dl_name_converter(DSO * dso,const char * filename)252 static char *dl_name_converter(DSO *dso, const char *filename)
253 {
254 char *translated;
255 int len, rsize, transform;
256
257 len = strlen(filename);
258 rsize = len + 1;
259 transform = (strstr(filename, "/") == NULL);
260 {
261 /* We will convert this to "%s.s?" or "lib%s.s?" */
262 rsize += strlen(extension);/* The length of ".s?" */
263 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
264 rsize += 3; /* The length of "lib" */
265 }
266 translated = OPENSSL_malloc(rsize);
267 if(translated == NULL)
268 {
269 DSOerr(DSO_F_DL_NAME_CONVERTER,
270 DSO_R_NAME_TRANSLATION_FAILED);
271 return(NULL);
272 }
273 if(transform)
274 {
275 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
276 sprintf(translated, "lib%s%s", filename, extension);
277 else
278 sprintf(translated, "%s%s", filename, extension);
279 }
280 else
281 sprintf(translated, "%s", filename);
282 return(translated);
283 }
284
285 #ifdef OPENSSL_FIPS
dl_ref_point()286 static void dl_ref_point(){}
287
DSO_pathbyaddr(void * addr,char * path,int sz)288 int DSO_pathbyaddr(void *addr,char *path,int sz)
289 {
290 struct shl_descriptor inf;
291 int i,len;
292
293 if (addr == NULL)
294 {
295 union { void(*f)(); void *p; } t = { dl_ref_point };
296 addr = t.p;
297 }
298
299 for (i=-1;shl_get_r(i,&inf)==0;i++)
300 {
301 if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
302 ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend))
303 {
304 len = (int)strlen(inf.filename);
305 if (sz <= 0) return len+1;
306 if (len >= sz) len=sz-1;
307 memcpy(path,inf.filename,len);
308 path[len++] = 0;
309 return len;
310 }
311 }
312
313 return -1;
314 }
315 #endif
316
317 #endif /* DSO_DL */
318