cbecb3ac37
mechanism to the ENGINE framework. This means there there are going to be new functionality for the DSO part, and ultimately some way of merging two file specifications together. This commit places the merging code into the repository. It's currently not used anywhere, and hasn't been tested at all. It may be full of errors, including syntactical ones. Those will be fixed as promptly as possible.
352 lines
9.8 KiB
C
352 lines
9.8 KiB
C
/* 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 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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};
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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|DYNAMIC_PATH, NULL);
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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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#endif /* DSO_DL */
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