[thirdparty/openssl.git] / crypto / dso / 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 "internal/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 = OPENSSL_zalloc(sizeof(*ret));
    if (ret == NULL) {
        DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
        return (NULL);
    }
    ret->meth_data = sk_void_new_null();
    if (ret->meth_data == 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)) {
        sk_void_free(ret->meth_data);
        OPENSSL_free(ret);
        ret = NULL;
    }
    return (ret);
}

int DSO_free(DSO *dso)
{
    int i;

    if (dso == NULL)
        return (1);

    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_void_free(dso->meth_data);
    OPENSSL_free(dso->filename);
    OPENSSL_free(dso->loaded_filename);
    OPENSSL_free(dso);
    return (1);
}

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

int DSO_up_ref(DSO *dso)
{
    if (dso == NULL) {
        DSOerr(DSO_F_DSO_UP_REF, 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 (dso == NULL) {
        ret = DSO_new_method(meth);
        if (ret == NULL) {
            DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        allocated = 1;
        /* Pass the provided flags to the new DSO object */
        if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
            DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
            goto err;
        }
    } else
        ret = dso;
    /* Don't load if we're currently already loaded */
    if (ret->filename != NULL) {
        DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
        goto err;
    }
    /*
     * filename can only be NULL if we were passed a dso that already has one
     * set.
     */
    if (filename != NULL)
        if (!DSO_set_filename(ret, filename)) {
            DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
            goto err;
        }
    filename = ret->filename;
    if (filename == NULL) {
        DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
        goto err;
    }
    if (ret->meth->dso_load == NULL) {
        DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
        goto err;
    }
    if (!ret->meth->dso_load(ret)) {
        DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
        goto err;
    }
    /* Load succeeded */
    return (ret);
 err:
    if (allocated)
        DSO_free(ret);
    return (NULL);
}

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));
}

int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
                           DSO_NAME_CONVERTER_FUNC *oldcb)
{
    if (dso == NULL) {
        DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
        return (0);
    }
    if (oldcb)
        *oldcb = dso->name_converter;
    dso->name_converter = cb;
    return (1);
}

const char *DSO_get_filename(DSO *dso)
{
    if (dso == NULL) {
        DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
        return (NULL);
    }
    return (dso->filename);
}

int DSO_set_filename(DSO *dso, const char *filename)
{
    char *copied;

    if ((dso == NULL) || (filename == NULL)) {
        DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
        return (0);
    }
    if (dso->loaded_filename) {
        DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
        return (0);
    }
    /* We'll duplicate filename */
    copied = OPENSSL_malloc(strlen(filename) + 1);
    if (copied == NULL) {
        DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
        return (0);
    }
    OPENSSL_strlcpy(copied, filename, strlen(filename) + 1);
    OPENSSL_free(dso->filename);
    dso->filename = copied;
    return (1);
}

char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
{
    char *result = NULL;

    if (dso == NULL || filespec1 == NULL) {
        DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
        return (NULL);
    }
    if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
        if (dso->merger != NULL)
            result = dso->merger(dso, filespec1, filespec2);
        else if (dso->meth->dso_merger != NULL)
            result = dso->meth->dso_merger(dso, filespec1, filespec2);
    }
    return (result);
}

char *DSO_convert_filename(DSO *dso, const char *filename)
{
    char *result = NULL;

    if (dso == NULL) {
        DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
        return (NULL);
    }
    if (filename == NULL)
        filename = dso->filename;
    if (filename == NULL) {
        DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
        return (NULL);
    }
    if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
        if (dso->name_converter != NULL)
            result = dso->name_converter(dso, filename);
        else if (dso->meth->dso_name_converter != NULL)
            result = dso->meth->dso_name_converter(dso, filename);
    }
    if (result == NULL) {
        result = OPENSSL_malloc(strlen(filename) + 1);
        if (result == NULL) {
            DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
            return (NULL);
        }
        OPENSSL_strlcpy(result, filename, strlen(filename) + 1);
    }
    return (result);
}

const char *DSO_get_loaded_filename(DSO *dso)
{
    if (dso == NULL) {
        DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
        return (NULL);
    }
    return (dso->loaded_filename);
}

int DSO_pathbyaddr(void *addr, char *path, int sz)
{
    DSO_METHOD *meth = default_DSO_meth;
    if (meth == NULL)
        meth = DSO_METHOD_openssl();
    if (meth->pathbyaddr == NULL) {
        DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
        return -1;
    }
    return (*meth->pathbyaddr) (addr, path, sz);
}

void *DSO_global_lookup(const char *name)
{
    DSO_METHOD *meth = default_DSO_meth;
    if (meth == NULL)
        meth = DSO_METHOD_openssl();
    if (meth->globallookup == NULL) {
        DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
        return NULL;
    }
    return (*meth->globallookup) (name);
}
Commit	Line	Data
0f113f3e MC	1	/*
	2	* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
	3	* 2000.
8f4fac7f GT	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
0f113f3e	13	* notice, this list of conditions and the following disclaimer.
8f4fac7f GT	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>
b39fc560	61	#include "internal/cryptlib.h"
8f4fac7f GT	62	#include <openssl/dso.h>
	63
	64	static DSO_METHOD *default_DSO_meth = NULL;
	65
	66	DSO *DSO_new(void)
0f113f3e MC	67	{
	68	return (DSO_new_method(NULL));
	69	}
8f4fac7f GT	70
8f4fac7f GT	71	void DSO_set_default_method(DSO_METHOD *meth)
0f113f3e MC	72	{
	73	default_DSO_meth = meth;
	74	}
8f4fac7f GT	75
8f4fac7f GT	76	DSO_METHOD *DSO_get_default_method(void)
0f113f3e MC	77	{
	78	return (default_DSO_meth);
	79	}
8f4fac7f GT	80
8f4fac7f GT	81	DSO_METHOD DSO_get_method(DSO dso)
0f113f3e MC	82	{
	83	return (dso->meth);
	84	}
8f4fac7f GT	85
8f4fac7f GT	86	DSO_METHOD DSO_set_method(DSO dso, DSO_METHOD *meth)
0f113f3e MC	87	{
	88	DSO_METHOD *mtmp;
	89	mtmp = dso->meth;
	90	dso->meth = meth;
	91	return (mtmp);
	92	}
8f4fac7f GT	93
8f4fac7f GT	94	DSO DSO_new_method(DSO_METHOD meth)
0f113f3e MC	95	{
	96	DSO *ret;
	97
b196e7d9	98	if (default_DSO_meth == NULL) {
0f113f3e MC	99	/*
	100	* We default to DSO_METH_openssl() which in turn defaults to
	101	* stealing the "best available" method. Will fallback to
	102	* DSO_METH_null() in the worst case.
	103	*/
	104	default_DSO_meth = DSO_METHOD_openssl();
b196e7d9	105	}
b51bce94	106	ret = OPENSSL_zalloc(sizeof(*ret));
0f113f3e MC	107	if (ret == NULL) {
	108	DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
	109	return (NULL);
	110	}
0f113f3e MC	111	ret->meth_data = sk_void_new_null();
	112	if (ret->meth_data == NULL) {
	113	/* sk_new doesn't generate any errors so we do */
	114	DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
	115	OPENSSL_free(ret);
	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)) {
98637bd3	124	sk_void_free(ret->meth_data);
0f113f3e MC	125	OPENSSL_free(ret);
	126	ret = NULL;
	127	}
	128	return (ret);
	129	}
8f4fac7f GT	130
8f4fac7f GT	131	int DSO_free(DSO *dso)
0f113f3e MC	132	{
	133	int i;
	134
efa7dd64 RS	135	if (dso == NULL)
efa7dd64 RS	136	return (1);
0f113f3e MC	137
0f113f3e MC	138	i = CRYPTO_add(&dso->references, -1, CRYPTO_LOCK_DSO);
8f4fac7f	139	#ifdef REF_PRINT
0f113f3e	140	REF_PRINT("DSO", dso);
8f4fac7f	141	#endif
0f113f3e MC	142	if (i > 0)
0f113f3e MC	143	return (1);
8f4fac7f	144	#ifdef REF_CHECK
0f113f3e MC	145	if (i < 0) {
	146	fprintf(stderr, "DSO_free, bad reference count\n");
	147	abort();
	148	}
8f4fac7f GT	149	#endif
8f4fac7f GT	150
0f113f3e MC	151	if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
	152	DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
	153	return (0);
	154	}
8f4fac7f	155
0f113f3e MC	156	if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
	157	DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
	158	return (0);
	159	}
	160
	161	sk_void_free(dso->meth_data);
b548a1f1 RS	162	OPENSSL_free(dso->filename);
b548a1f1 RS	163	OPENSSL_free(dso->loaded_filename);
0f113f3e MC	164	OPENSSL_free(dso);
	165	return (1);
	166	}
	167
	168	int DSO_flags(DSO *dso)
	169	{
	170	return ((dso == NULL) ? 0 : dso->flags);
	171	}
8f4fac7f	172
d9ff8890	173	int DSO_up_ref(DSO *dso)
0f113f3e MC	174	{
	175	if (dso == NULL) {
	176	DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
	177	return (0);
	178	}
8f4fac7f	179
0f113f3e MC	180	CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
	181	return (1);
	182	}
8f4fac7f	183
b9e63915	184	DSO DSO_load(DSO dso, const char filename, DSO_METHOD meth, int flags)
0f113f3e MC	185	{
	186	DSO *ret;
	187	int allocated = 0;
	188
	189	if (dso == NULL) {
	190	ret = DSO_new_method(meth);
	191	if (ret == NULL) {
	192	DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
	193	goto err;
	194	}
	195	allocated = 1;
	196	/* Pass the provided flags to the new DSO object */
	197	if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
	198	DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
	199	goto err;
	200	}
	201	} else
	202	ret = dso;
	203	/* Don't load if we're currently already loaded */
	204	if (ret->filename != NULL) {
	205	DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
	206	goto err;
	207	}
	208	/*
	209	* filename can only be NULL if we were passed a dso that already has one
	210	* set.
	211	*/
	212	if (filename != NULL)
	213	if (!DSO_set_filename(ret, filename)) {
	214	DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
	215	goto err;
	216	}
	217	filename = ret->filename;
	218	if (filename == NULL) {
	219	DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
	220	goto err;
	221	}
	222	if (ret->meth->dso_load == NULL) {
	223	DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
	224	goto err;
	225	}
	226	if (!ret->meth->dso_load(ret)) {
	227	DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
	228	goto err;
	229	}
	230	/* Load succeeded */
	231	return (ret);
	232	err:
	233	if (allocated)
	234	DSO_free(ret);
	235	return (NULL);
	236	}
8f4fac7f	237
e9a68cfb	238	void DSO_bind_var(DSO dso, const char *symname)
0f113f3e MC	239	{
	240	void *ret = NULL;
	241
	242	if ((dso == NULL) \|\| (symname == NULL)) {
	243	DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
	244	return (NULL);
	245	}
	246	if (dso->meth->dso_bind_var == NULL) {
	247	DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
	248	return (NULL);
	249	}
	250	if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
	251	DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
	252	return (NULL);
	253	}
	254	/* Success */
	255	return (ret);
	256	}
e9a68cfb GT	257
e9a68cfb GT	258	DSO_FUNC_TYPE DSO_bind_func(DSO dso, const char symname)
0f113f3e MC	259	{
	260	DSO_FUNC_TYPE ret = NULL;
	261
	262	if ((dso == NULL) \|\| (symname == NULL)) {
	263	DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
	264	return (NULL);
	265	}
	266	if (dso->meth->dso_bind_func == NULL) {
	267	DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
	268	return (NULL);
	269	}
	270	if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
	271	DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
	272	return (NULL);
	273	}
	274	/* Success */
	275	return (ret);
	276	}
	277
	278	/*
	279	* I don't really like these *_ctrl functions very much to be perfectly
	280	* honest. For one thing, I think I have to return a negative value for any
	281	* error because possible DSO_ctrl() commands may return values such as
	282	* "size"s that can legitimately be zero (making the standard
61986d32	283	* "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
0f113f3e MC	284	* times. I'd prefer "output" values to be passed by reference and the return
	285	* value as success/failure like usual ... but we conform when we must... :-)
	286	*/
b9e63915	287	long DSO_ctrl(DSO dso, int cmd, long larg, void parg)
0f113f3e MC	288	{
	289	if (dso == NULL) {
	290	DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
	291	return (-1);
	292	}
	293	/*
	294	* We should intercept certain generic commands and only pass control to
	295	* the method-specific ctrl() function if it's something we don't handle.
	296	*/
	297	switch (cmd) {
	298	case DSO_CTRL_GET_FLAGS:
	299	return dso->flags;
	300	case DSO_CTRL_SET_FLAGS:
	301	dso->flags = (int)larg;
	302	return (0);
	303	case DSO_CTRL_OR_FLAGS:
	304	dso->flags \|= (int)larg;
	305	return (0);
	306	default:
	307	break;
	308	}
	309	if ((dso->meth == NULL) \|\| (dso->meth->dso_ctrl == NULL)) {
	310	DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
	311	return (-1);
	312	}
	313	return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
	314	}
51c8dc37 GT	315
51c8dc37 GT	316	int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
0f113f3e MC	317	DSO_NAME_CONVERTER_FUNC *oldcb)
	318	{
	319	if (dso == NULL) {
	320	DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
	321	return (0);
	322	}
	323	if (oldcb)
	324	*oldcb = dso->name_converter;
	325	dso->name_converter = cb;
	326	return (1);
	327	}
51c8dc37 GT	328
51c8dc37 GT	329	const char DSO_get_filename(DSO dso)
0f113f3e MC	330	{
	331	if (dso == NULL) {
	332	DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	333	return (NULL);
	334	}
	335	return (dso->filename);
	336	}
51c8dc37 GT	337
51c8dc37 GT	338	int DSO_set_filename(DSO dso, const char filename)
0f113f3e MC	339	{
	340	char *copied;
	341
	342	if ((dso == NULL) \|\| (filename == NULL)) {
	343	DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	344	return (0);
	345	}
	346	if (dso->loaded_filename) {
	347	DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
	348	return (0);
	349	}
	350	/* We'll duplicate filename */
	351	copied = OPENSSL_malloc(strlen(filename) + 1);
	352	if (copied == NULL) {
	353	DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
	354	return (0);
	355	}
7644a9ae	356	OPENSSL_strlcpy(copied, filename, strlen(filename) + 1);
b548a1f1	357	OPENSSL_free(dso->filename);
0f113f3e MC	358	dso->filename = copied;
	359	return (1);
	360	}
51c8dc37	361
cbecb3ac	362	char DSO_merge(DSO dso, const char filespec1, const char filespec2)
0f113f3e MC	363	{
	364	char *result = NULL;
	365
	366	if (dso == NULL \|\| filespec1 == NULL) {
	367	DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
	368	return (NULL);
	369	}
	370	if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
	371	if (dso->merger != NULL)
	372	result = dso->merger(dso, filespec1, filespec2);
	373	else if (dso->meth->dso_merger != NULL)
	374	result = dso->meth->dso_merger(dso, filespec1, filespec2);
	375	}
	376	return (result);
	377	}
cbecb3ac	378
51c8dc37	379	char DSO_convert_filename(DSO dso, const char *filename)
0f113f3e MC	380	{
	381	char *result = NULL;
	382
	383	if (dso == NULL) {
	384	DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	385	return (NULL);
	386	}
	387	if (filename == NULL)
	388	filename = dso->filename;
	389	if (filename == NULL) {
	390	DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
	391	return (NULL);
	392	}
	393	if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
	394	if (dso->name_converter != NULL)
	395	result = dso->name_converter(dso, filename);
	396	else if (dso->meth->dso_name_converter != NULL)
	397	result = dso->meth->dso_name_converter(dso, filename);
	398	}
	399	if (result == NULL) {
	400	result = OPENSSL_malloc(strlen(filename) + 1);
	401	if (result == NULL) {
	402	DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
	403	return (NULL);
	404	}
7644a9ae	405	OPENSSL_strlcpy(result, filename, strlen(filename) + 1);
0f113f3e MC	406	}
	407	return (result);
	408	}
51c8dc37 GT	409
51c8dc37 GT	410	const char DSO_get_loaded_filename(DSO dso)
0f113f3e MC	411	{
	412	if (dso == NULL) {
	413	DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	414	return (NULL);
	415	}
	416	return (dso->loaded_filename);
	417	}
	418
	419	int DSO_pathbyaddr(void addr, char path, int sz)
	420	{
	421	DSO_METHOD *meth = default_DSO_meth;
	422	if (meth == NULL)
	423	meth = DSO_METHOD_openssl();
	424	if (meth->pathbyaddr == NULL) {
	425	DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
	426	return -1;
	427	}
	428	return (*meth->pathbyaddr) (addr, path, sz);
	429	}
68b64fb6	430
c6cb42e4	431	void DSO_global_lookup(const char name)
0f113f3e MC	432	{
	433	DSO_METHOD *meth = default_DSO_meth;
	434	if (meth == NULL)
	435	meth = DSO_METHOD_openssl();
	436	if (meth->globallookup == NULL) {
	437	DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
	438	return NULL;
	439	}
	440	return (*meth->globallookup) (name);
	441	}