[thirdparty/openssl.git] / crypto / dso / dso_lib.c

/* dso_lib.c */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <openssl/crypto.h>
#include "cryptlib.h"
#include <openssl/dso.h>

static DSO_METHOD *default_DSO_meth = NULL;

DSO *DSO_new(void)
	{
	return(DSO_new_method(NULL));
	}

void DSO_set_default_method(DSO_METHOD *meth)
	{
	default_DSO_meth = meth;
	}

DSO_METHOD *DSO_get_default_method(void)
	{
	return(default_DSO_meth);
	}

DSO_METHOD *DSO_get_method(DSO *dso)
	{
	return(dso->meth);
	}

DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
	{
	DSO_METHOD *mtmp;
	mtmp = dso->meth;
	dso->meth = meth;
	return(mtmp);
	}

DSO *DSO_new_method(DSO_METHOD *meth)
	{
	DSO *ret;

	if(default_DSO_meth == NULL)
		/* We default to DSO_METH_openssl() which in turn defaults
		 * to stealing the "best available" method. Will fallback
		 * to DSO_METH_null() in the worst case. */
		default_DSO_meth = DSO_METHOD_openssl();
	ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
	if(ret == NULL)
		{
		DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
		return(NULL);
		}
	memset(ret, 0, sizeof(DSO));
	ret->meth_data = sk_new_null();
	if((ret->meth_data = sk_new_null()) == NULL)
		{
		/* sk_new doesn't generate any errors so we do */
		DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
		OPENSSL_free(ret);
		return(NULL);
		}
	if(meth == NULL)
		ret->meth = default_DSO_meth;
	else
		ret->meth = meth;
	ret->references = 1;
	if((ret->meth->init != NULL) && !ret->meth->init(ret))
		{
		OPENSSL_free(ret);
		ret=NULL;
		}
	return(ret);
	}

int DSO_free(DSO *dso)
	{
        int i;
 
	if(dso == NULL)
		{
		DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
		return(0);
		}
 
	i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
#ifdef REF_PRINT
	REF_PRINT("DSO",dso);
#endif
	if(i > 0) return(1);
#ifdef REF_CHECK
	if(i < 0)
		{
		fprintf(stderr,"DSO_free, bad reference count\n");
		abort();
		}
#endif

	if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
		{
		DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
		return(0);
		}
 
	if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
		{
		DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
		return(0);
		}
	
	sk_free(dso->meth_data);
 
	OPENSSL_free(dso);
	return(1);
	}

int DSO_flags(DSO *dso)
	{
	return((dso == NULL) ? 0 : dso->flags);
	}


int DSO_up(DSO *dso)
	{
	if (dso == NULL)
		{
		DSOerr(DSO_F_DSO_UP,ERR_R_PASSED_NULL_PARAMETER);
		return(0);
		}

	CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
	return(1);
	}

DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
	{
	DSO *ret;
	int allocated = 0;

	if(filename == NULL)
		{
		DSOerr(DSO_F_DSO_LOAD,ERR_R_PASSED_NULL_PARAMETER);
		return(NULL);
		}
	if(dso == NULL)
		{
		ret = DSO_new_method(meth);
		if(ret == NULL)
			{
			DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
			return(NULL);
			}
		allocated = 1;
		}
	else
		ret = dso;
	/* Bleurgh ... have to check for negative return values for
	 * errors. <grimace> */
	if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
		if(allocated)
			DSO_free(ret);
		return(NULL);
		}
	if(ret->meth->dso_load == NULL)
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
		if(allocated)
			DSO_free(ret);
		return(NULL);
		}
	if(!ret->meth->dso_load(ret, filename))
		{
		DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
		if(allocated)
			DSO_free(ret);
		return(NULL);
		}
	/* Load succeeded */
	return(ret);
	}

void *DSO_bind_var(DSO *dso, const char *symname)
	{
	void *ret = NULL;

	if((dso == NULL) || (symname == NULL))
		{
		DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
		return(NULL);
		}
	if(dso->meth->dso_bind_var == NULL)
		{
		DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);
		return(NULL);
		}
	if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)
		{
		DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE);
		return(NULL);
		}
	/* Success */
	return(ret);
	}

DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
	{
	DSO_FUNC_TYPE ret = NULL;

	if((dso == NULL) || (symname == NULL))
		{
		DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
		return(NULL);
		}
	if(dso->meth->dso_bind_func == NULL)
		{
		DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);
		return(NULL);
		}
	if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)
		{
		DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE);
		return(NULL);
		}
	/* Success */
	return(ret);
	}

/* I don't really like these *_ctrl functions very much to be perfectly
 * honest. For one thing, I think I have to return a negative value for
 * any error because possible DSO_ctrl() commands may return values
 * such as "size"s that can legitimately be zero (making the standard
 * "if(DSO_cmd(...))" form that works almost everywhere else fail at
 * odd times. I'd prefer "output" values to be passed by reference and
 * the return value as success/failure like usual ... but we conform
 * when we must... :-) */
long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
	{
	if(dso == NULL)
		{
		DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);
		return(-1);
		}
	/* We should intercept certain generic commands and only pass control
	 * to the method-specific ctrl() function if it's something we don't
	 * handle. */
	switch(cmd)
		{
	case DSO_CTRL_GET_FLAGS:
		return dso->flags;
	case DSO_CTRL_SET_FLAGS:
		dso->flags = (int)larg;
		return(0);
	case DSO_CTRL_OR_FLAGS:
		dso->flags |= (int)larg;
		return(0);
	default:
		break;
		}
	if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL))
		{
		DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);
		return(-1);
		}
	return(dso->meth->dso_ctrl(dso,cmd,larg,parg));
	}
Commit	Line	Data
8f4fac7f GT	1	/* dso_lib.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 <openssl/crypto.h>
	61	#include "cryptlib.h"
	62	#include <openssl/dso.h>
	63
	64	static DSO_METHOD *default_DSO_meth = NULL;
65
66	DSO *DSO_new(void)
67	{
68	return(DSO_new_method(NULL));
69	}
70
71	void DSO_set_default_method(DSO_METHOD *meth)
72	{
73	default_DSO_meth = meth;
74	}
75
76	DSO_METHOD *DSO_get_default_method(void)
77	{
78	return(default_DSO_meth);
79	}
80
81	DSO_METHOD DSO_get_method(DSO dso)
82	{
83	return(dso->meth);
84	}
85
86	DSO_METHOD DSO_set_method(DSO dso, DSO_METHOD *meth)
87	{
88	DSO_METHOD *mtmp;
89	mtmp = dso->meth;
90	dso->meth = meth;
91	return(mtmp);
92	}
93
94	DSO DSO_new_method(DSO_METHOD meth)
95	{
96	DSO *ret;
97
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();
26a3a48d	103	ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
8f4fac7f GT	104	if(ret == NULL)
	105	{
	106	DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
	107	return(NULL);
	108	}
	109	memset(ret, 0, sizeof(DSO));
62324627 RL	110	ret->meth_data = sk_new_null();
62324627 RL	111	if((ret->meth_data = sk_new_null()) == NULL)
8f4fac7f GT	112	{
	113	/* sk_new doesn't generate any errors so we do */
	114	DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
26a3a48d	115	OPENSSL_free(ret);
8f4fac7f GT	116	return(NULL);
	117	}
	118	if(meth == NULL)
	119	ret->meth = default_DSO_meth;
	120	else
	121	ret->meth = meth;
	122	ret->references = 1;
	123	if((ret->meth->init != NULL) && !ret->meth->init(ret))
	124	{
26a3a48d	125	OPENSSL_free(ret);
8f4fac7f GT	126	ret=NULL;
	127	}
	128	return(ret);
	129	}
	130
	131	int DSO_free(DSO *dso)
	132	{
	133	int i;
	134
	135	if(dso == NULL)
	136	{
	137	DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
	138	return(0);
	139	}
	140
	141	i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
	142	#ifdef REF_PRINT
	143	REF_PRINT("DSO",dso);
	144	#endif
	145	if(i > 0) return(1);
	146	#ifdef REF_CHECK
	147	if(i < 0)
	148	{
	149	fprintf(stderr,"DSO_free, bad reference count\n");
	150	abort();
	151	}
	152	#endif
	153
	154	if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
	155	{
	156	DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
	157	return(0);
	158	}
	159
	160	if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
	161	{
	162	DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
	163	return(0);
	164	}
	165
	166	sk_free(dso->meth_data);
	167
26a3a48d	168	OPENSSL_free(dso);
8f4fac7f GT	169	return(1);
	170	}
	171
	172	int DSO_flags(DSO *dso)
	173	{
	174	return((dso == NULL) ? 0 : dso->flags);
	175	}
	176
	177
	178	int DSO_up(DSO *dso)
	179	{
	180	if (dso == NULL)
	181	{
	182	DSOerr(DSO_F_DSO_UP,ERR_R_PASSED_NULL_PARAMETER);
	183	return(0);
	184	}
	185
	186	CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
	187	return(1);
	188	}
	189
b9e63915	190	DSO DSO_load(DSO dso, const char filename, DSO_METHOD meth, int flags)
8f4fac7f GT	191	{
	192	DSO *ret;
	193	int allocated = 0;
	194
	195	if(filename == NULL)
	196	{
	197	DSOerr(DSO_F_DSO_LOAD,ERR_R_PASSED_NULL_PARAMETER);
	198	return(NULL);
	199	}
	200	if(dso == NULL)
	201	{
	202	ret = DSO_new_method(meth);
	203	if(ret == NULL)
	204	{
	205	DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
	206	return(NULL);
	207	}
	208	allocated = 1;
	209	}
	210	else
	211	ret = dso;
b9e63915 GT	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)
	215	{
	216	DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
	217	if(allocated)
	218	DSO_free(ret);
	219	return(NULL);
	220	}
8f4fac7f GT	221	if(ret->meth->dso_load == NULL)
	222	{
	223	DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
	224	if(allocated)
	225	DSO_free(ret);
	226	return(NULL);
	227	}
	228	if(!ret->meth->dso_load(ret, filename))
	229	{
	230	DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
	231	if(allocated)
	232	DSO_free(ret);
	233	return(NULL);
	234	}
	235	/* Load succeeded */
	236	return(ret);
	237	}
	238
e9a68cfb	239	void DSO_bind_var(DSO dso, const char *symname)
8f4fac7f GT	240	{
	241	void *ret = NULL;
	242
	243	if((dso == NULL) \|\| (symname == NULL))
	244	{
e9a68cfb	245	DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
8f4fac7f GT	246	return(NULL);
8f4fac7f GT	247	}
e9a68cfb	248	if(dso->meth->dso_bind_var == NULL)
8f4fac7f	249	{
e9a68cfb	250	DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);
8f4fac7f GT	251	return(NULL);
8f4fac7f GT	252	}
e9a68cfb	253	if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)
8f4fac7f	254	{
e9a68cfb GT	255	DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE);
	256	return(NULL);
	257	}
	258	/* Success */
	259	return(ret);
	260	}
	261
	262	DSO_FUNC_TYPE DSO_bind_func(DSO dso, const char symname)
	263	{
	264	DSO_FUNC_TYPE ret = NULL;
	265
	266	if((dso == NULL) \|\| (symname == NULL))
	267	{
	268	DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
	269	return(NULL);
	270	}
	271	if(dso->meth->dso_bind_func == NULL)
	272	{
	273	DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);
	274	return(NULL);
	275	}
	276	if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)
	277	{
	278	DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE);
8f4fac7f GT	279	return(NULL);
	280	}
	281	/* Success */
	282	return(ret);
	283	}
b9e63915 GT	284
	285	/* I don't really like these *_ctrl functions very much to be perfectly
	286	* honest. For one thing, I think I have to return a negative value for
	287	* any error because possible DSO_ctrl() commands may return values
	288	* such as "size"s that can legitimately be zero (making the standard
	289	* "if(DSO_cmd(...))" form that works almost everywhere else fail at
	290	* odd times. I'd prefer "output" values to be passed by reference and
	291	* the return value as success/failure like usual ... but we conform
	292	* when we must... :-) */
	293	long DSO_ctrl(DSO dso, int cmd, long larg, void parg)
	294	{
	295	if(dso == NULL)
	296	{
	297	DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);
	298	return(-1);
	299	}
5b0a0544 GT	300	/* We should intercept certain generic commands and only pass control
	301	* to the method-specific ctrl() function if it's something we don't
	302	* handle. */
	303	switch(cmd)
	304	{
	305	case DSO_CTRL_GET_FLAGS:
	306	return dso->flags;
	307	case DSO_CTRL_SET_FLAGS:
	308	dso->flags = (int)larg;
	309	return(0);
	310	case DSO_CTRL_OR_FLAGS:
	311	dso->flags \|= (int)larg;
	312	return(0);
	313	default:
	314	break;
	315	}
b9e63915 GT	316	if((dso->meth == NULL) \|\| (dso->meth->dso_ctrl == NULL))
	317	{
	318	DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);
	319	return(-1);
	320	}
	321	return(dso->meth->dso_ctrl(dso,cmd,larg,parg));
	322	}