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393 lines
11 KiB
393 lines
11 KiB
/* dso_dl.c -*- mode:C; c-file-style: "eay" -*- */
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/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
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* project 2000.
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*/
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/* ====================================================================
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* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/dso.h>
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#ifndef DSO_DL
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DSO_METHOD *DSO_METHOD_dl(void)
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{
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return NULL;
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}
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#else
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#include <dl.h>
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/* Part of the hack in "dl_load" ... */
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#define DSO_MAX_TRANSLATED_SIZE 256
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static int dl_load(DSO *dso);
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static int dl_unload(DSO *dso);
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static void *dl_bind_var(DSO *dso, const char *symname);
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static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
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#if 0
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static int dl_unbind_var(DSO *dso, char *symname, void *symptr);
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static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
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static int dl_init(DSO *dso);
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static int dl_finish(DSO *dso);
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static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
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#endif
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static char *dl_name_converter(DSO *dso, const char *filename);
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static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2);
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static int dl_pathbyaddr(void *addr,char *path,int sz);
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static void *dl_globallookup(const char *name);
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static DSO_METHOD dso_meth_dl = {
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"OpenSSL 'dl' shared library method",
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dl_load,
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dl_unload,
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dl_bind_var,
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dl_bind_func,
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/* For now, "unbind" doesn't exist */
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#if 0
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NULL, /* unbind_var */
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NULL, /* unbind_func */
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#endif
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NULL, /* ctrl */
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dl_name_converter,
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dl_merger,
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NULL, /* init */
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NULL, /* finish */
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dl_pathbyaddr,
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dl_globallookup
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};
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DSO_METHOD *DSO_METHOD_dl(void)
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{
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return(&dso_meth_dl);
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}
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/* For this DSO_METHOD, our meth_data STACK will contain;
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* (i) the handle (shl_t) returned from shl_load().
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* NB: I checked on HPUX11 and shl_t is itself a pointer
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* type so the cast is safe.
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*/
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static int dl_load(DSO *dso)
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{
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shl_t ptr = NULL;
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/* We don't do any fancy retries or anything, just take the method's
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* (or DSO's if it has the callback set) best translation of the
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* platform-independant filename and try once with that. */
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char *filename= DSO_convert_filename(dso, NULL);
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if(filename == NULL)
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{
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DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);
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goto err;
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}
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ptr = shl_load(filename, BIND_IMMEDIATE |
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(dso->flags&DSO_FLAG_NO_NAME_TRANSLATION?0:DYNAMIC_PATH), 0L);
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if(ptr == NULL)
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{
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DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
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ERR_add_error_data(4, "filename(", filename, "): ",
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strerror(errno));
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goto err;
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}
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if(!sk_push(dso->meth_data, (char *)ptr))
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{
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DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
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goto err;
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}
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/* Success, stick the converted filename we've loaded under into the DSO
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* (it also serves as the indicator that we are currently loaded). */
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dso->loaded_filename = filename;
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return(1);
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err:
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/* Cleanup! */
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if(filename != NULL)
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OPENSSL_free(filename);
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if(ptr != NULL)
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shl_unload(ptr);
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return(0);
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}
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static int dl_unload(DSO *dso)
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{
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shl_t ptr;
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if(dso == NULL)
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{
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DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
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return(0);
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}
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if(sk_num(dso->meth_data) < 1)
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return(1);
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/* Is this statement legal? */
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ptr = (shl_t)sk_pop(dso->meth_data);
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if(ptr == NULL)
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{
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DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
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/* Should push the value back onto the stack in
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* case of a retry. */
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sk_push(dso->meth_data, (char *)ptr);
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return(0);
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}
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shl_unload(ptr);
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return(1);
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}
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static void *dl_bind_var(DSO *dso, const char *symname)
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{
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shl_t ptr;
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void *sym;
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if((dso == NULL) || (symname == NULL))
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{
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DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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if(sk_num(dso->meth_data) < 1)
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{
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DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
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return(NULL);
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}
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ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
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if(ptr == NULL)
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{
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DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
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return(NULL);
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}
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if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
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{
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DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
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ERR_add_error_data(4, "symname(", symname, "): ",
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strerror(errno));
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return(NULL);
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}
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return(sym);
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}
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static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
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{
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shl_t ptr;
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void *sym;
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if((dso == NULL) || (symname == NULL))
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{
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DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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if(sk_num(dso->meth_data) < 1)
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{
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DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
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return(NULL);
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}
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ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
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if(ptr == NULL)
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{
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DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
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return(NULL);
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}
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if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
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{
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DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
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ERR_add_error_data(4, "symname(", symname, "): ",
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strerror(errno));
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return(NULL);
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}
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return((DSO_FUNC_TYPE)sym);
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}
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static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
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{
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char *merged;
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if(!filespec1 && !filespec2)
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{
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DSOerr(DSO_F_DL_MERGER,
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ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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/* If the first file specification is a rooted path, it rules.
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same goes if the second file specification is missing. */
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if (!filespec2 || filespec1[0] == '/')
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{
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merged = OPENSSL_malloc(strlen(filespec1) + 1);
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if(!merged)
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{
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DSOerr(DSO_F_DL_MERGER,
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ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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strcpy(merged, filespec1);
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}
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/* If the first file specification is missing, the second one rules. */
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else if (!filespec1)
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{
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merged = OPENSSL_malloc(strlen(filespec2) + 1);
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if(!merged)
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{
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DSOerr(DSO_F_DL_MERGER,
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ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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strcpy(merged, filespec2);
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}
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else
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/* This part isn't as trivial as it looks. It assumes that
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the second file specification really is a directory, and
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makes no checks whatsoever. Therefore, the result becomes
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the concatenation of filespec2 followed by a slash followed
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by filespec1. */
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{
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int spec2len, len;
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spec2len = (filespec2 ? strlen(filespec2) : 0);
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len = spec2len + (filespec1 ? strlen(filespec1) : 0);
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if(filespec2 && filespec2[spec2len - 1] == '/')
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{
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spec2len--;
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len--;
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}
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merged = OPENSSL_malloc(len + 2);
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if(!merged)
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{
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DSOerr(DSO_F_DL_MERGER,
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ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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strcpy(merged, filespec2);
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merged[spec2len] = '/';
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strcpy(&merged[spec2len + 1], filespec1);
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}
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return(merged);
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}
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/* This function is identical to the one in dso_dlfcn.c, but as it is highly
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* unlikely that both the "dl" *and* "dlfcn" variants are being compiled at the
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* same time, there's no great duplicating the code. Figuring out an elegant
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* way to share one copy of the code would be more difficult and would not
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* leave the implementations independant. */
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#if defined(__hpux)
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static const char extension[] = ".sl";
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#else
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static const char extension[] = ".so";
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#endif
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static char *dl_name_converter(DSO *dso, const char *filename)
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{
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char *translated;
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int len, rsize, transform;
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len = strlen(filename);
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rsize = len + 1;
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transform = (strstr(filename, "/") == NULL);
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{
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/* We will convert this to "%s.s?" or "lib%s.s?" */
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rsize += strlen(extension);/* The length of ".s?" */
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if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
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rsize += 3; /* The length of "lib" */
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}
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translated = OPENSSL_malloc(rsize);
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if(translated == NULL)
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{
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DSOerr(DSO_F_DL_NAME_CONVERTER,
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DSO_R_NAME_TRANSLATION_FAILED);
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return(NULL);
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}
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if(transform)
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{
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if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
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sprintf(translated, "lib%s%s", filename, extension);
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else
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sprintf(translated, "%s%s", filename, extension);
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}
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else
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sprintf(translated, "%s", filename);
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return(translated);
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}
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static int dl_pathbyaddr(void *addr,char *path,int sz)
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{
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struct shl_descriptor inf;
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int i,len;
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if (addr == NULL)
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{
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union { int(*f)(void*,char*,int); void *p; } t =
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{ dl_pathbyaddr };
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addr = t.p;
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}
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for (i=-1;shl_get_r(i,&inf)==0;i++)
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{
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if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
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((size_t)addr >= inf.dstart && (size_t)addr < inf.dend))
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{
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len = (int)strlen(inf.filename);
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if (sz <= 0) return len+1;
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if (len >= sz) len=sz-1;
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memcpy(path,inf.filename,len);
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path[len++] = 0;
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return len;
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}
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}
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return -1;
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}
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static void *dl_globallookup(const char *name)
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{
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void *ret;
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shl_t h = NULL;
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return shl_findsym(&h,name,TYPE_UNDEFINED,&ret) ? NULL : ret;
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}
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#endif /* DSO_DL */
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