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1 | /* dso_win32.c */ |
2 | /* Written by Geoff Thorpe (geoff@geoffthorpe.net) 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 WIN32 | |
64 | DSO_METHOD *DSO_METHOD_win32(void) | |
65 | { | |
66 | return NULL; | |
67 | } | |
68 | #else | |
69 | ||
70 | static int win32_load(DSO *dso, char *filename); | |
71 | static int win32_unload(DSO *dso); | |
72 | static int win32_bind(DSO *dso, char *symname, void **symptr); | |
73 | #if 0 | |
74 | static int win32_unbind(DSO *dso, char *symname, void *symptr); | |
75 | static int win32_init(DSO *dso); | |
76 | static int win32_finish(DSO *dso); | |
77 | #endif | |
78 | ||
79 | static DSO_METHOD dso_meth_win32 = { | |
80 | "OpenSSL 'win32' shared library method", | |
81 | win32_load, | |
82 | win32_unload, | |
83 | win32_bind, | |
84 | /* For now, "unbind" doesn't exist */ | |
85 | #if 0 | |
86 | NULL, /* unbind */ | |
87 | #endif | |
88 | NULL, /* init */ | |
89 | NULL /* finish */ | |
90 | }; | |
91 | ||
92 | DSO_METHOD *DSO_METHOD_win32(void) | |
93 | { | |
94 | return(&dso_meth_win32); | |
95 | } | |
96 | ||
97 | /* For this DSO_METHOD, our meth_data STACK will contain; | |
98 | * (i) a pointer to the handle (HINSTANCE) returned from | |
99 | * LoadLibrary(), and copied. | |
100 | */ | |
101 | ||
102 | static int win32_load(DSO *dso, char *filename) | |
103 | { | |
104 | HINSTANCE h, *p; | |
105 | ||
106 | h = LoadLibrary(filename); | |
107 | if(h == NULL) | |
108 | { | |
109 | DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED); | |
110 | return(0); | |
111 | } | |
112 | p = (HINSTANCE *)Malloc(sizeof(HINSTANCE)); | |
113 | if(p == NULL) | |
114 | { | |
115 | DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE); | |
116 | FreeLibrary(h); | |
117 | return(0); | |
118 | } | |
119 | *p = h; | |
120 | if(!sk_push(dso->meth_data, (char *)p)) | |
121 | { | |
122 | DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR); | |
123 | FreeLibrary(h); | |
124 | Free(p); | |
125 | return(0); | |
126 | } | |
127 | return(1); | |
128 | } | |
129 | ||
130 | static int win32_unload(DSO *dso) | |
131 | { | |
132 | HINSTANCE *p; | |
133 | if(dso == NULL) | |
134 | { | |
135 | DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER); | |
136 | return(0); | |
137 | } | |
138 | if(sk_num(dso->meth_data) < 1) | |
139 | { | |
140 | DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_STACK_ERROR); | |
141 | return(0); | |
142 | } | |
143 | p = (HINSTANCE *)sk_pop(dso->meth_data); | |
144 | if(p == NULL) | |
145 | { | |
146 | DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE); | |
147 | return(0); | |
148 | } | |
149 | if(!FreeLibrary(p)) | |
150 | { | |
151 | DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED); | |
152 | /* We should push the value back onto the stack in | |
153 | * case of a retry. */ | |
154 | sk_push(dso->meth_data, (char *)p); | |
155 | return(0); | |
156 | } | |
157 | /* Cleanup */ | |
158 | Free(p); | |
159 | return(1); | |
160 | } | |
161 | ||
162 | static int win32_bind(DSO *dso, char *symname, void **symptr) | |
163 | { | |
164 | HINSTANCE *ptr; | |
165 | void *sym; | |
166 | ||
167 | if((dso == NULL) || (symptr == NULL) || (symname == NULL)) | |
168 | { | |
169 | DSOerr(DSO_F_WIN32_BIND,ERR_R_PASSED_NULL_PARAMETER); | |
170 | return(0); | |
171 | } | |
172 | if(sk_num(dso->meth_data) < 1) | |
173 | { | |
174 | DSOerr(DSO_F_WIN32_BIND,DSO_R_STACK_ERROR); | |
175 | return(0); | |
176 | } | |
177 | ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1); | |
178 | if(ptr == NULL) | |
179 | { | |
180 | DSOerr(DSO_F_WIN32_BIND,DSO_R_NULL_HANDLE); | |
181 | return(0); | |
182 | } | |
183 | sym = GetProcAddress(*ptr, symname); | |
184 | if(sym == NULL) | |
185 | { | |
186 | DSOerr(DSO_F_WIN32_BIND,DSO_R_SYM_FAILURE); | |
187 | return(0); | |
188 | } | |
189 | *symptr = sym; | |
190 | return(1); | |
191 | } | |
192 | ||
193 | #endif /* WIN32 */ |