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).
60 #include <openssl/crypto.h>
62 #include <openssl/dso.h>
64 static DSO_METHOD *default_DSO_meth = NULL;
68 return(DSO_new_method(NULL));
71 void DSO_set_default_method(DSO_METHOD *meth)
73 default_DSO_meth = meth;
76 DSO_METHOD *DSO_get_default_method(void)
78 return(default_DSO_meth);
81 DSO_METHOD *DSO_get_method(DSO *dso)
86 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
94 DSO *DSO_new_method(DSO_METHOD *meth)
98 if(default_DSO_meth == NULL)
99 /* We default to DSO_METH_openssl() which in turn defaults
100 * to stealing the "best available" method. Will fallback
101 * to DSO_METH_null() in the worst case. */
102 default_DSO_meth = DSO_METHOD_openssl();
103 ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
106 DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
109 memset(ret, 0, sizeof(DSO));
110 ret->meth_data = sk_new(NULL);
111 if((ret->meth_data = sk_new(NULL)) == NULL)
113 /* sk_new doesn't generate any errors so we do */
114 DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
119 ret->meth = default_DSO_meth;
123 if((ret->meth->init != NULL) && !ret->meth->init(ret))
131 int DSO_free(DSO *dso)
137 DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
141 i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
143 REF_PRINT("DSO",dso);
149 fprintf(stderr,"DSO_free, bad reference count\n");
154 if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
156 DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
160 if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
162 DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
166 sk_free(dso->meth_data);
172 int DSO_flags(DSO *dso)
174 return((dso == NULL) ? 0 : dso->flags);
182 DSOerr(DSO_F_DSO_UP,ERR_R_PASSED_NULL_PARAMETER);
186 CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
190 DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
197 DSOerr(DSO_F_DSO_LOAD,ERR_R_PASSED_NULL_PARAMETER);
202 ret = DSO_new_method(meth);
205 DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
212 /* Bleurgh ... have to check for negative return values for
213 * errors. <grimace> */
214 if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)
216 DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
221 if(ret->meth->dso_load == NULL)
223 DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
228 if(!ret->meth->dso_load(ret, filename))
230 DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
239 void *DSO_bind(DSO *dso, const char *symname)
243 if((dso == NULL) || (symname == NULL))
245 DSOerr(DSO_F_DSO_BIND,ERR_R_PASSED_NULL_PARAMETER);
248 if(dso->meth->dso_bind == NULL)
250 DSOerr(DSO_F_DSO_BIND,DSO_R_UNSUPPORTED);
253 if(!dso->meth->dso_bind(dso, symname, &ret))
255 DSOerr(DSO_F_DSO_BIND,DSO_R_SYM_FAILURE);
262 /* I don't really like these *_ctrl functions very much to be perfectly
263 * honest. For one thing, I think I have to return a negative value for
264 * any error because possible DSO_ctrl() commands may return values
265 * such as "size"s that can legitimately be zero (making the standard
266 * "if(DSO_cmd(...))" form that works almost everywhere else fail at
267 * odd times. I'd prefer "output" values to be passed by reference and
268 * the return value as success/failure like usual ... but we conform
269 * when we must... :-) */
270 long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
274 DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);
277 if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL))
279 DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);
282 return(dso->meth->dso_ctrl(dso,cmd,larg,parg));