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

/* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */
/*
 * 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 = 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_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)) {
        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_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);
    }
    BUF_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);
        }
        BUF_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
cbecb3ac	1	/* dso_lib.c -- mode:C; c-file-style: "eay" -- */
0f113f3e MC	2	/*
	3	* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
	4	* 2000.
8f4fac7f GT	5	*/
	6	/* ====================================================================
	7	* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
0f113f3e	14	* notice, this list of conditions and the following disclaimer.
8f4fac7f GT	15	*
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in
	18	* the documentation and/or other materials provided with the
	19	* distribution.
	20	*
	21	* 3. All advertising materials mentioning features or use of this
	22	* software must display the following acknowledgment:
	23	* "This product includes software developed by the OpenSSL Project
	24	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	25	*
	26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	27	* endorse or promote products derived from this software without
	28	* prior written permission. For written permission, please contact
	29	* licensing@OpenSSL.org.
	30	*
	31	* 5. Products derived from this software may not be called "OpenSSL"
	32	* nor may "OpenSSL" appear in their names without prior written
	33	* permission of the OpenSSL Project.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	41	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	51	* OF THE POSSIBILITY OF SUCH DAMAGE.
	52	* ====================================================================
	53	*
	54	* This product includes cryptographic software written by Eric Young
	55	* (eay@cryptsoft.com). This product includes software written by Tim
	56	* Hudson (tjh@cryptsoft.com).
	57	*
	58	*/
	59
	60	#include <stdio.h>
	61	#include <openssl/crypto.h>
	62	#include "cryptlib.h"
	63	#include <openssl/dso.h>
	64
	65	static DSO_METHOD *default_DSO_meth = NULL;
	66
	67	DSO *DSO_new(void)
0f113f3e MC	68	{
	69	return (DSO_new_method(NULL));
	70	}
8f4fac7f GT	71
8f4fac7f GT	72	void DSO_set_default_method(DSO_METHOD *meth)
0f113f3e MC	73	{
	74	default_DSO_meth = meth;
	75	}
8f4fac7f GT	76
8f4fac7f GT	77	DSO_METHOD *DSO_get_default_method(void)
0f113f3e MC	78	{
	79	return (default_DSO_meth);
	80	}
8f4fac7f GT	81
8f4fac7f GT	82	DSO_METHOD DSO_get_method(DSO dso)
0f113f3e MC	83	{
	84	return (dso->meth);
	85	}
8f4fac7f GT	86
8f4fac7f GT	87	DSO_METHOD DSO_set_method(DSO dso, DSO_METHOD *meth)
0f113f3e MC	88	{
	89	DSO_METHOD *mtmp;
	90	mtmp = dso->meth;
	91	dso->meth = meth;
	92	return (mtmp);
	93	}
8f4fac7f GT	94
8f4fac7f GT	95	DSO DSO_new_method(DSO_METHOD meth)
0f113f3e MC	96	{
	97	DSO *ret;
	98
b196e7d9	99	if (default_DSO_meth == NULL) {
0f113f3e MC	100	/*
	101	* We default to DSO_METH_openssl() which in turn defaults to
	102	* stealing the "best available" method. Will fallback to
	103	* DSO_METH_null() in the worst case.
	104	*/
	105	default_DSO_meth = DSO_METHOD_openssl();
b196e7d9 RS	106	}
b196e7d9 RS	107	ret = OPENSSL_malloc(sizeof(DSO));
0f113f3e MC	108	if (ret == NULL) {
	109	DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
	110	return (NULL);
	111	}
	112	memset(ret, 0, sizeof(DSO));
	113	ret->meth_data = sk_void_new_null();
	114	if (ret->meth_data == NULL) {
	115	/* sk_new doesn't generate any errors so we do */
	116	DSOerr(DSO_F_DSO_NEW_METHOD, ERR_R_MALLOC_FAILURE);
	117	OPENSSL_free(ret);
	118	return (NULL);
	119	}
	120	if (meth == NULL)
	121	ret->meth = default_DSO_meth;
	122	else
	123	ret->meth = meth;
	124	ret->references = 1;
	125	if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
	126	OPENSSL_free(ret);
	127	ret = NULL;
	128	}
	129	return (ret);
	130	}
8f4fac7f GT	131
8f4fac7f GT	132	int DSO_free(DSO *dso)
0f113f3e MC	133	{
	134	int i;
	135
	136	if (dso == NULL) {
	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);
8f4fac7f	142	#ifdef REF_PRINT
0f113f3e	143	REF_PRINT("DSO", dso);
8f4fac7f	144	#endif
0f113f3e MC	145	if (i > 0)
0f113f3e MC	146	return (1);
8f4fac7f	147	#ifdef REF_CHECK
0f113f3e MC	148	if (i < 0) {
	149	fprintf(stderr, "DSO_free, bad reference count\n");
	150	abort();
	151	}
8f4fac7f GT	152	#endif
8f4fac7f GT	153
0f113f3e MC	154	if ((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso)) {
	155	DSOerr(DSO_F_DSO_FREE, DSO_R_UNLOAD_FAILED);
	156	return (0);
	157	}
8f4fac7f	158
0f113f3e MC	159	if ((dso->meth->finish != NULL) && !dso->meth->finish(dso)) {
	160	DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED);
	161	return (0);
	162	}
	163
	164	sk_void_free(dso->meth_data);
b548a1f1 RS	165	OPENSSL_free(dso->filename);
b548a1f1 RS	166	OPENSSL_free(dso->loaded_filename);
0f113f3e MC	167	OPENSSL_free(dso);
	168	return (1);
	169	}
	170
	171	int DSO_flags(DSO *dso)
	172	{
	173	return ((dso == NULL) ? 0 : dso->flags);
	174	}
8f4fac7f	175
d9ff8890	176	int DSO_up_ref(DSO *dso)
0f113f3e MC	177	{
	178	if (dso == NULL) {
	179	DSOerr(DSO_F_DSO_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
	180	return (0);
	181	}
8f4fac7f	182
0f113f3e MC	183	CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
	184	return (1);
	185	}
8f4fac7f	186
b9e63915	187	DSO DSO_load(DSO dso, const char filename, DSO_METHOD meth, int flags)
0f113f3e MC	188	{
	189	DSO *ret;
	190	int allocated = 0;
	191
	192	if (dso == NULL) {
	193	ret = DSO_new_method(meth);
	194	if (ret == NULL) {
	195	DSOerr(DSO_F_DSO_LOAD, ERR_R_MALLOC_FAILURE);
	196	goto err;
	197	}
	198	allocated = 1;
	199	/* Pass the provided flags to the new DSO object */
	200	if (DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0) {
	201	DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED);
	202	goto err;
	203	}
	204	} else
	205	ret = dso;
	206	/* Don't load if we're currently already loaded */
	207	if (ret->filename != NULL) {
	208	DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED);
	209	goto err;
	210	}
	211	/*
	212	* filename can only be NULL if we were passed a dso that already has one
	213	* set.
	214	*/
	215	if (filename != NULL)
	216	if (!DSO_set_filename(ret, filename)) {
	217	DSOerr(DSO_F_DSO_LOAD, DSO_R_SET_FILENAME_FAILED);
	218	goto err;
	219	}
	220	filename = ret->filename;
	221	if (filename == NULL) {
	222	DSOerr(DSO_F_DSO_LOAD, DSO_R_NO_FILENAME);
	223	goto err;
	224	}
	225	if (ret->meth->dso_load == NULL) {
	226	DSOerr(DSO_F_DSO_LOAD, DSO_R_UNSUPPORTED);
	227	goto err;
	228	}
	229	if (!ret->meth->dso_load(ret)) {
	230	DSOerr(DSO_F_DSO_LOAD, DSO_R_LOAD_FAILED);
	231	goto err;
	232	}
	233	/* Load succeeded */
	234	return (ret);
	235	err:
	236	if (allocated)
	237	DSO_free(ret);
	238	return (NULL);
	239	}
8f4fac7f	240
e9a68cfb	241	void DSO_bind_var(DSO dso, const char *symname)
0f113f3e MC	242	{
	243	void *ret = NULL;
	244
	245	if ((dso == NULL) \|\| (symname == NULL)) {
	246	DSOerr(DSO_F_DSO_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
	247	return (NULL);
	248	}
	249	if (dso->meth->dso_bind_var == NULL) {
	250	DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_UNSUPPORTED);
	251	return (NULL);
	252	}
	253	if ((ret = dso->meth->dso_bind_var(dso, symname)) == NULL) {
	254	DSOerr(DSO_F_DSO_BIND_VAR, DSO_R_SYM_FAILURE);
	255	return (NULL);
	256	}
	257	/* Success */
	258	return (ret);
	259	}
e9a68cfb GT	260
e9a68cfb GT	261	DSO_FUNC_TYPE DSO_bind_func(DSO dso, const char symname)
0f113f3e MC	262	{
	263	DSO_FUNC_TYPE ret = NULL;
	264
	265	if ((dso == NULL) \|\| (symname == NULL)) {
	266	DSOerr(DSO_F_DSO_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
	267	return (NULL);
	268	}
	269	if (dso->meth->dso_bind_func == NULL) {
	270	DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_UNSUPPORTED);
	271	return (NULL);
	272	}
	273	if ((ret = dso->meth->dso_bind_func(dso, symname)) == NULL) {
	274	DSOerr(DSO_F_DSO_BIND_FUNC, DSO_R_SYM_FAILURE);
	275	return (NULL);
	276	}
	277	/* Success */
	278	return (ret);
	279	}
	280
	281	/*
	282	* I don't really like these *_ctrl functions very much to be perfectly
	283	* honest. For one thing, I think I have to return a negative value for any
	284	* error because possible DSO_ctrl() commands may return values such as
	285	* "size"s that can legitimately be zero (making the standard
61986d32	286	* "if (DSO_cmd(...))" form that works almost everywhere else fail at odd
0f113f3e MC	287	* times. I'd prefer "output" values to be passed by reference and the return
	288	* value as success/failure like usual ... but we conform when we must... :-)
	289	*/
b9e63915	290	long DSO_ctrl(DSO dso, int cmd, long larg, void parg)
0f113f3e MC	291	{
	292	if (dso == NULL) {
	293	DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER);
	294	return (-1);
	295	}
	296	/*
	297	* We should intercept certain generic commands and only pass control to
	298	* the method-specific ctrl() function if it's something we don't handle.
	299	*/
	300	switch (cmd) {
	301	case DSO_CTRL_GET_FLAGS:
	302	return dso->flags;
	303	case DSO_CTRL_SET_FLAGS:
	304	dso->flags = (int)larg;
	305	return (0);
	306	case DSO_CTRL_OR_FLAGS:
	307	dso->flags \|= (int)larg;
	308	return (0);
	309	default:
	310	break;
	311	}
	312	if ((dso->meth == NULL) \|\| (dso->meth->dso_ctrl == NULL)) {
	313	DSOerr(DSO_F_DSO_CTRL, DSO_R_UNSUPPORTED);
	314	return (-1);
	315	}
	316	return (dso->meth->dso_ctrl(dso, cmd, larg, parg));
	317	}
51c8dc37 GT	318
51c8dc37 GT	319	int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
0f113f3e MC	320	DSO_NAME_CONVERTER_FUNC *oldcb)
	321	{
	322	if (dso == NULL) {
	323	DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, ERR_R_PASSED_NULL_PARAMETER);
	324	return (0);
	325	}
	326	if (oldcb)
	327	*oldcb = dso->name_converter;
	328	dso->name_converter = cb;
	329	return (1);
	330	}
51c8dc37 GT	331
51c8dc37 GT	332	const char DSO_get_filename(DSO dso)
0f113f3e MC	333	{
	334	if (dso == NULL) {
	335	DSOerr(DSO_F_DSO_GET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	336	return (NULL);
	337	}
	338	return (dso->filename);
	339	}
51c8dc37 GT	340
51c8dc37 GT	341	int DSO_set_filename(DSO dso, const char filename)
0f113f3e MC	342	{
	343	char *copied;
	344
	345	if ((dso == NULL) \|\| (filename == NULL)) {
	346	DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	347	return (0);
	348	}
	349	if (dso->loaded_filename) {
	350	DSOerr(DSO_F_DSO_SET_FILENAME, DSO_R_DSO_ALREADY_LOADED);
	351	return (0);
	352	}
	353	/* We'll duplicate filename */
	354	copied = OPENSSL_malloc(strlen(filename) + 1);
	355	if (copied == NULL) {
	356	DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE);
	357	return (0);
	358	}
	359	BUF_strlcpy(copied, filename, strlen(filename) + 1);
b548a1f1	360	OPENSSL_free(dso->filename);
0f113f3e MC	361	dso->filename = copied;
	362	return (1);
	363	}
51c8dc37	364
cbecb3ac	365	char DSO_merge(DSO dso, const char filespec1, const char filespec2)
0f113f3e MC	366	{
	367	char *result = NULL;
	368
	369	if (dso == NULL \|\| filespec1 == NULL) {
	370	DSOerr(DSO_F_DSO_MERGE, ERR_R_PASSED_NULL_PARAMETER);
	371	return (NULL);
	372	}
	373	if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
	374	if (dso->merger != NULL)
	375	result = dso->merger(dso, filespec1, filespec2);
	376	else if (dso->meth->dso_merger != NULL)
	377	result = dso->meth->dso_merger(dso, filespec1, filespec2);
	378	}
	379	return (result);
	380	}
cbecb3ac	381
51c8dc37	382	char DSO_convert_filename(DSO dso, const char *filename)
0f113f3e MC	383	{
	384	char *result = NULL;
	385
	386	if (dso == NULL) {
	387	DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	388	return (NULL);
	389	}
	390	if (filename == NULL)
	391	filename = dso->filename;
	392	if (filename == NULL) {
	393	DSOerr(DSO_F_DSO_CONVERT_FILENAME, DSO_R_NO_FILENAME);
	394	return (NULL);
	395	}
	396	if ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) {
	397	if (dso->name_converter != NULL)
	398	result = dso->name_converter(dso, filename);
	399	else if (dso->meth->dso_name_converter != NULL)
	400	result = dso->meth->dso_name_converter(dso, filename);
	401	}
	402	if (result == NULL) {
	403	result = OPENSSL_malloc(strlen(filename) + 1);
	404	if (result == NULL) {
	405	DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE);
	406	return (NULL);
	407	}
	408	BUF_strlcpy(result, filename, strlen(filename) + 1);
	409	}
	410	return (result);
	411	}
51c8dc37 GT	412
51c8dc37 GT	413	const char DSO_get_loaded_filename(DSO dso)
0f113f3e MC	414	{
	415	if (dso == NULL) {
	416	DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, ERR_R_PASSED_NULL_PARAMETER);
	417	return (NULL);
	418	}
	419	return (dso->loaded_filename);
	420	}
	421
	422	int DSO_pathbyaddr(void addr, char path, int sz)
	423	{
	424	DSO_METHOD *meth = default_DSO_meth;
	425	if (meth == NULL)
	426	meth = DSO_METHOD_openssl();
	427	if (meth->pathbyaddr == NULL) {
	428	DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED);
	429	return -1;
	430	}
	431	return (*meth->pathbyaddr) (addr, path, sz);
	432	}
68b64fb6	433
c6cb42e4	434	void DSO_global_lookup(const char name)
0f113f3e MC	435	{
	436	DSO_METHOD *meth = default_DSO_meth;
	437	if (meth == NULL)
	438	meth = DSO_METHOD_openssl();
	439	if (meth->globallookup == NULL) {
	440	DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED);
	441	return NULL;
	442	}
	443	return (*meth->globallookup) (name);
	444	}