2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
16 /* Part of the hack in "dl_load" ... */
17 # define DSO_MAX_TRANSLATED_SIZE 256
19 static int dl_load(DSO *dso);
20 static int dl_unload(DSO *dso);
21 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
22 static char *dl_name_converter(DSO *dso, const char *filename);
23 static char *dl_merger(DSO *dso, const char *filespec1,
24 const char *filespec2);
25 static void *dl_globallookup(const char *name);
27 static DSO_METHOD dso_meth_dl = {
28 "OpenSSL 'dl' shared library method",
40 DSO_METHOD *DSO_METHOD_openssl(void)
46 * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
47 * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
48 * itself a pointer type so the cast is safe.
51 static int dl_load(DSO *dso)
55 * We don't do any fancy retries or anything, just take the method's (or
56 * DSO's if it has the callback set) best translation of the
57 * platform-independent filename and try once with that.
59 char *filename = DSO_convert_filename(dso, NULL);
61 if (filename == NULL) {
62 DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME);
65 ptr = shl_load(filename, BIND_IMMEDIATE |
66 (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 :
70 DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED);
71 if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
72 ERR_add_error_data(4, "filename(", filename, "): ", errbuf);
75 if (!sk_push(dso->meth_data, (char *)ptr)) {
76 DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR);
80 * Success, stick the converted filename we've loaded under into the DSO
81 * (it also serves as the indicator that we are currently loaded).
83 dso->loaded_filename = filename;
87 OPENSSL_free(filename);
93 static int dl_unload(DSO *dso)
97 DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
100 if (sk_num(dso->meth_data) < 1)
102 /* Is this statement legal? */
103 ptr = (shl_t) sk_pop(dso->meth_data);
105 DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE);
107 * Should push the value back onto the stack in case of a retry.
109 sk_push(dso->meth_data, (char *)ptr);
116 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
121 if ((dso == NULL) || (symname == NULL)) {
122 DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
125 if (sk_num(dso->meth_data) < 1) {
126 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR);
129 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
131 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE);
134 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
136 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE);
137 if (openssl_strerror_r(errno, errbuf, sizeof(errbuf)))
138 ERR_add_error_data(4, "symname(", symname, "): ", errbuf);
141 return ((DSO_FUNC_TYPE)sym);
144 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
148 if (!filespec1 && !filespec2) {
149 DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER);
153 * If the first file specification is a rooted path, it rules. same goes
154 * if the second file specification is missing.
156 if (!filespec2 || filespec1[0] == '/') {
157 merged = OPENSSL_strdup(filespec1);
158 if (merged == NULL) {
159 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
164 * If the first file specification is missing, the second one rules.
166 else if (!filespec1) {
167 merged = OPENSSL_strdup(filespec2);
168 if (merged == NULL) {
169 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
174 * This part isn't as trivial as it looks. It assumes that the
175 * second file specification really is a directory, and makes no
176 * checks whatsoever. Therefore, the result becomes the
177 * concatenation of filespec2 followed by a slash followed by
183 spec2len = (filespec2 ? strlen(filespec2) : 0);
184 len = spec2len + (filespec1 ? strlen(filespec1) : 0);
186 if (spec2len && filespec2[spec2len - 1] == '/') {
190 merged = OPENSSL_malloc(len + 2);
191 if (merged == NULL) {
192 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
195 strcpy(merged, filespec2);
196 merged[spec2len] = '/';
197 strcpy(&merged[spec2len + 1], filespec1);
203 * This function is identical to the one in dso_dlfcn.c, but as it is highly
204 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
205 * the same time, there's no great duplicating the code. Figuring out an
206 * elegant way to share one copy of the code would be more difficult and
207 * would not leave the implementations independent.
209 static char *dl_name_converter(DSO *dso, const char *filename)
212 int len, rsize, transform;
214 len = strlen(filename);
216 transform = (strstr(filename, "/") == NULL);
218 /* We will convert this to "%s.s?" or "lib%s.s?" */
219 rsize += strlen(DSO_EXTENSION); /* The length of ".s?" */
220 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
221 rsize += 3; /* The length of "lib" */
223 translated = OPENSSL_malloc(rsize);
224 if (translated == NULL) {
225 DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
229 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
230 sprintf(translated, "lib%s%s", filename, DSO_EXTENSION);
232 sprintf(translated, "%s%s", filename, DSO_EXTENSION);
234 sprintf(translated, "%s", filename);
238 static void *dl_globallookup(const char *name)
243 return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret;