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0f113f3e MC |
1 | /* |
2 | * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project | |
3 | * 2000. | |
8f4fac7f GT |
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 | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
8f4fac7f GT |
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 | ||
73decf59 | 59 | #include "dso_locl.h" |
8f4fac7f | 60 | |
38186bfd | 61 | #ifdef DSO_DL |
8f4fac7f | 62 | |
0f113f3e | 63 | # include <dl.h> |
8f4fac7f | 64 | |
b9e63915 | 65 | /* Part of the hack in "dl_load" ... */ |
0f113f3e | 66 | # define DSO_MAX_TRANSLATED_SIZE 256 |
b9e63915 | 67 | |
51c8dc37 | 68 | static int dl_load(DSO *dso); |
8f4fac7f | 69 | static int dl_unload(DSO *dso); |
e9a68cfb | 70 | static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname); |
51c8dc37 | 71 | static char *dl_name_converter(DSO *dso, const char *filename); |
0f113f3e MC |
72 | static char *dl_merger(DSO *dso, const char *filespec1, |
73 | const char *filespec2); | |
c6cb42e4 | 74 | static void *dl_globallookup(const char *name); |
8f4fac7f GT |
75 | |
76 | static DSO_METHOD dso_meth_dl = { | |
0f113f3e MC |
77 | "OpenSSL 'dl' shared library method", |
78 | dl_load, | |
79 | dl_unload, | |
0f113f3e | 80 | dl_bind_func, |
0f113f3e MC |
81 | NULL, /* ctrl */ |
82 | dl_name_converter, | |
83 | dl_merger, | |
84 | NULL, /* init */ | |
85 | NULL, /* finish */ | |
0f113f3e MC |
86 | dl_globallookup |
87 | }; | |
8f4fac7f | 88 | |
38186bfd | 89 | DSO_METHOD *DSO_METHOD_openssl(void) |
0f113f3e | 90 | { |
38186bfd | 91 | return &dso_meth_dl; |
0f113f3e | 92 | } |
8f4fac7f | 93 | |
0f113f3e MC |
94 | /* |
95 | * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle | |
96 | * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is | |
97 | * itself a pointer type so the cast is safe. | |
8f4fac7f GT |
98 | */ |
99 | ||
51c8dc37 | 100 | static int dl_load(DSO *dso) |
0f113f3e MC |
101 | { |
102 | shl_t ptr = NULL; | |
103 | /* | |
104 | * We don't do any fancy retries or anything, just take the method's (or | |
105 | * DSO's if it has the callback set) best translation of the | |
106 | * platform-independent filename and try once with that. | |
107 | */ | |
108 | char *filename = DSO_convert_filename(dso, NULL); | |
8f4fac7f | 109 | |
0f113f3e MC |
110 | if (filename == NULL) { |
111 | DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME); | |
112 | goto err; | |
113 | } | |
114 | ptr = shl_load(filename, BIND_IMMEDIATE | | |
115 | (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 : | |
116 | DYNAMIC_PATH), 0L); | |
117 | if (ptr == NULL) { | |
118 | DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED); | |
119 | ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno)); | |
120 | goto err; | |
121 | } | |
122 | if (!sk_push(dso->meth_data, (char *)ptr)) { | |
123 | DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR); | |
124 | goto err; | |
125 | } | |
126 | /* | |
127 | * Success, stick the converted filename we've loaded under into the DSO | |
128 | * (it also serves as the indicator that we are currently loaded). | |
129 | */ | |
130 | dso->loaded_filename = filename; | |
131 | return (1); | |
132 | err: | |
133 | /* Cleanup! */ | |
b548a1f1 | 134 | OPENSSL_free(filename); |
0f113f3e MC |
135 | if (ptr != NULL) |
136 | shl_unload(ptr); | |
137 | return (0); | |
138 | } | |
8f4fac7f GT |
139 | |
140 | static int dl_unload(DSO *dso) | |
0f113f3e MC |
141 | { |
142 | shl_t ptr; | |
143 | if (dso == NULL) { | |
144 | DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER); | |
145 | return (0); | |
146 | } | |
147 | if (sk_num(dso->meth_data) < 1) | |
148 | return (1); | |
149 | /* Is this statement legal? */ | |
150 | ptr = (shl_t) sk_pop(dso->meth_data); | |
151 | if (ptr == NULL) { | |
152 | DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE); | |
153 | /* | |
154 | * Should push the value back onto the stack in case of a retry. | |
155 | */ | |
156 | sk_push(dso->meth_data, (char *)ptr); | |
157 | return (0); | |
158 | } | |
159 | shl_unload(ptr); | |
160 | return (1); | |
161 | } | |
8f4fac7f | 162 | |
e9a68cfb | 163 | static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname) |
0f113f3e MC |
164 | { |
165 | shl_t ptr; | |
166 | void *sym; | |
e9a68cfb | 167 | |
0f113f3e MC |
168 | if ((dso == NULL) || (symname == NULL)) { |
169 | DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
170 | return (NULL); | |
171 | } | |
172 | if (sk_num(dso->meth_data) < 1) { | |
173 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR); | |
174 | return (NULL); | |
175 | } | |
176 | ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1); | |
177 | if (ptr == NULL) { | |
178 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE); | |
179 | return (NULL); | |
180 | } | |
181 | if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) { | |
182 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE); | |
183 | ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno)); | |
184 | return (NULL); | |
185 | } | |
186 | return ((DSO_FUNC_TYPE)sym); | |
187 | } | |
8f4fac7f | 188 | |
cbecb3ac | 189 | static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2) |
0f113f3e MC |
190 | { |
191 | char *merged; | |
cbecb3ac | 192 | |
0f113f3e MC |
193 | if (!filespec1 && !filespec2) { |
194 | DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER); | |
195 | return (NULL); | |
196 | } | |
197 | /* | |
198 | * If the first file specification is a rooted path, it rules. same goes | |
199 | * if the second file specification is missing. | |
200 | */ | |
201 | if (!filespec2 || filespec1[0] == '/') { | |
a89c9a0d | 202 | merged = OPENSSL_strdup(filespec1); |
90945fa3 | 203 | if (merged == NULL) { |
0f113f3e MC |
204 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
205 | return (NULL); | |
206 | } | |
0f113f3e MC |
207 | } |
208 | /* | |
209 | * If the first file specification is missing, the second one rules. | |
210 | */ | |
211 | else if (!filespec1) { | |
a89c9a0d | 212 | merged = OPENSSL_strdup(filespec2); |
90945fa3 | 213 | if (merged == NULL) { |
0f113f3e MC |
214 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
215 | return (NULL); | |
216 | } | |
0f113f3e MC |
217 | } else |
218 | /* | |
219 | * This part isn't as trivial as it looks. It assumes that the | |
220 | * second file specification really is a directory, and makes no | |
221 | * checks whatsoever. Therefore, the result becomes the | |
222 | * concatenation of filespec2 followed by a slash followed by | |
223 | * filespec1. | |
224 | */ | |
225 | { | |
226 | int spec2len, len; | |
cbecb3ac | 227 | |
0f113f3e MC |
228 | spec2len = (filespec2 ? strlen(filespec2) : 0); |
229 | len = spec2len + (filespec1 ? strlen(filespec1) : 0); | |
cbecb3ac | 230 | |
947f9da1 | 231 | if (spec2len && filespec2[spec2len - 1] == '/') { |
0f113f3e MC |
232 | spec2len--; |
233 | len--; | |
234 | } | |
235 | merged = OPENSSL_malloc(len + 2); | |
90945fa3 | 236 | if (merged == NULL) { |
0f113f3e MC |
237 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
238 | return (NULL); | |
239 | } | |
240 | strcpy(merged, filespec2); | |
241 | merged[spec2len] = '/'; | |
242 | strcpy(&merged[spec2len + 1], filespec1); | |
243 | } | |
244 | return (merged); | |
245 | } | |
cbecb3ac | 246 | |
0f113f3e MC |
247 | /* |
248 | * This function is identical to the one in dso_dlfcn.c, but as it is highly | |
249 | * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at | |
250 | * the same time, there's no great duplicating the code. Figuring out an | |
251 | * elegant way to share one copy of the code would be more difficult and | |
252 | * would not leave the implementations independent. | |
253 | */ | |
51c8dc37 | 254 | static char *dl_name_converter(DSO *dso, const char *filename) |
0f113f3e MC |
255 | { |
256 | char *translated; | |
257 | int len, rsize, transform; | |
51c8dc37 | 258 | |
0f113f3e MC |
259 | len = strlen(filename); |
260 | rsize = len + 1; | |
261 | transform = (strstr(filename, "/") == NULL); | |
262 | { | |
263 | /* We will convert this to "%s.s?" or "lib%s.s?" */ | |
e987f9f2 | 264 | rsize += strlen(DSO_EXTENSION); /* The length of ".s?" */ |
0f113f3e MC |
265 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) |
266 | rsize += 3; /* The length of "lib" */ | |
267 | } | |
268 | translated = OPENSSL_malloc(rsize); | |
269 | if (translated == NULL) { | |
270 | DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED); | |
271 | return (NULL); | |
272 | } | |
273 | if (transform) { | |
274 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) | |
e987f9f2 | 275 | sprintf(translated, "lib%s%s", filename, DSO_EXTENSION); |
0f113f3e | 276 | else |
e987f9f2 | 277 | sprintf(translated, "%s%s", filename, DSO_EXTENSION); |
0f113f3e MC |
278 | } else |
279 | sprintf(translated, "%s", filename); | |
280 | return (translated); | |
281 | } | |
51c8dc37 | 282 | |
c6cb42e4 | 283 | static void *dl_globallookup(const char *name) |
0f113f3e MC |
284 | { |
285 | void *ret; | |
286 | shl_t h = NULL; | |
68b64fb6 | 287 | |
0f113f3e MC |
288 | return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret; |
289 | } | |
290 | #endif /* DSO_DL */ |