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).
62 #include <openssl/crypto.h>
69 typedef struct dso_st DSO;
71 typedef struct dso_meth_st
74 /* Loads a shared library */
75 int (*dso_load)(DSO *dso, const char *filename);
76 /* Unloads a shared library */
77 int (*dso_unload)(DSO *dso);
78 /* Binds a function, variable, or whatever */
79 int (*dso_bind)(DSO *dso, const char *symname, void **symptr);
81 /* I don't think this would actually be used in any circumstances. */
83 /* Unbinds a symbol */
84 int (*dso_unbind)(DSO *dso, char *symname, void *symptr);
87 int (*init)(DSO *dso);
88 int (*finish)(DSO *dso);
91 /**********************************************************************/
92 /* The low-level handle type used to refer to a loaded shared library */
97 /* Standard dlopen uses a (void *). Win32 uses a HANDLE. VMS
98 * doesn't use anything but will need to cache the filename
99 * for use in the dso_bind handler. All in all, let each
100 * method control its own destiny. "Handles" and such go in
105 /* For use by applications etc ... use this for your bits'n'pieces,
106 * don't touch meth_data! */
107 CRYPTO_EX_DATA ex_data;
112 DSO * DSO_new_method(DSO_METHOD *method);
113 int DSO_free(DSO *dso);
114 int DSO_flags(DSO *dso);
115 int DSO_up(DSO *dso);
117 void DSO_set_default_method(DSO_METHOD *meth);
118 DSO_METHOD *DSO_get_default_method(void);
119 DSO_METHOD *DSO_get_method(DSO *dso);
120 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth);
122 /* The all-singing all-dancing load function, you normally pass NULL
123 * for the first and third parameters. Use DSO_up and DSO_free for
124 * reference count handling. */
125 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth);
127 /* This function binds to a function, variable, whatever inside a
129 void *DSO_bind(DSO *dso, const char *symname);
131 /* This method is the default, but will beg, borrow, or steal whatever
132 * method should be the default on any particular platform (including
133 * DSO_METH_null() if necessary). */
134 DSO_METHOD *DSO_METHOD_openssl(void);
136 /* This method is defined for all platforms - if a platform has no
137 * DSO support then this will be the only method! */
138 DSO_METHOD *DSO_METHOD_null(void);
140 /* If DSO_DLFCN is defined, the standard dlfcn.h-style functions
141 * (dlopen, dlclose, dlsym, etc) will be used and incorporated into
142 * this method. If not, this method will return NULL. */
143 DSO_METHOD *DSO_METHOD_dlfcn(void);
145 /* If DSO_DL is defined, the standard dl.h-style functions (shl_load,
146 * shl_unload, shl_findsym, etc) will be used and incorporated into
147 * this method. If not, this method will return NULL. */
148 DSO_METHOD *DSO_METHOD_dl(void);
150 /* If WIN32 is defined, use DLLs. If not, return NULL. */
151 DSO_METHOD *DSO_METHOD_win32(void);
153 void ERR_load_DSO_strings(void);
155 /* BEGIN ERROR CODES */
156 /* The following lines are auto generated by the script mkerr.pl. Any changes
157 * made after this point may be overwritten when the script is next run.
160 /* Error codes for the DSO functions. */
162 /* Function codes. */
163 #define DSO_F_DLFCN_BIND 100
164 #define DSO_F_DLFCN_LOAD 101
165 #define DSO_F_DLFCN_UNLOAD 102
166 #define DSO_F_DL_BIND 103
167 #define DSO_F_DL_LOAD 104
168 #define DSO_F_DL_UNLOAD 105
169 #define DSO_F_DSO_BIND 106
170 #define DSO_F_DSO_FREE 107
171 #define DSO_F_DSO_LOAD 108
172 #define DSO_F_DSO_NEW_METHOD 109
173 #define DSO_F_DSO_UP 110
174 #define DSO_F_WIN32_BIND 111
175 #define DSO_F_WIN32_LOAD 112
176 #define DSO_F_WIN32_UNLOAD 113
179 #define DSO_R_FINISH_FAILED 100
180 #define DSO_R_LOAD_FAILED 101
181 #define DSO_R_NULL_HANDLE 102
182 #define DSO_R_STACK_ERROR 103
183 #define DSO_R_SYM_FAILURE 104
184 #define DSO_R_UNLOAD_FAILED 105
185 #define DSO_R_UNSUPPORTED 106