ref: 39f18c9d88f52a22373790dec5721fa3521d3f00
dir: /sys/src/ape/lib/openssl/crypto/dso/dso_dl.c/
/* dso_dl.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte ([email protected]) 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
* [email protected].
*
* 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
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/dso.h>
#ifndef DSO_DL
DSO_METHOD *DSO_METHOD_dl(void)
{
return NULL;
}
#else
#include <dl.h>
/* Part of the hack in "dl_load" ... */
#define DSO_MAX_TRANSLATED_SIZE 256
static int dl_load(DSO *dso);
static int dl_unload(DSO *dso);
static void *dl_bind_var(DSO *dso, const char *symname);
static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
#if 0
static int dl_unbind_var(DSO *dso, char *symname, void *symptr);
static int dl_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
static int dl_init(DSO *dso);
static int dl_finish(DSO *dso);
static int dl_ctrl(DSO *dso, int cmd, long larg, void *parg);
#endif
static char *dl_name_converter(DSO *dso, const char *filename);
static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2);
static DSO_METHOD dso_meth_dl = {
"OpenSSL 'dl' shared library method",
dl_load,
dl_unload,
dl_bind_var,
dl_bind_func,
/* For now, "unbind" doesn't exist */
#if 0
NULL, /* unbind_var */
NULL, /* unbind_func */
#endif
NULL, /* ctrl */
dl_name_converter,
dl_merger,
NULL, /* init */
NULL /* finish */
};
DSO_METHOD *DSO_METHOD_dl(void)
{
return(&dso_meth_dl);
}
/* For this DSO_METHOD, our meth_data STACK will contain;
* (i) the handle (shl_t) returned from shl_load().
* NB: I checked on HPUX11 and shl_t is itself a pointer
* type so the cast is safe.
*/
static int dl_load(DSO *dso)
{
shl_t ptr = NULL;
/* We don't do any fancy retries or anything, just take the method's
* (or DSO's if it has the callback set) best translation of the
* platform-independant filename and try once with that. */
char *filename= DSO_convert_filename(dso, NULL);
if(filename == NULL)
{
DSOerr(DSO_F_DL_LOAD,DSO_R_NO_FILENAME);
goto err;
}
ptr = shl_load(filename, BIND_IMMEDIATE |
(dso->flags&DSO_FLAG_NO_NAME_TRANSLATION?0:DYNAMIC_PATH), 0L);
if(ptr == NULL)
{
DSOerr(DSO_F_DL_LOAD,DSO_R_LOAD_FAILED);
ERR_add_error_data(4, "filename(", filename, "): ",
strerror(errno));
goto err;
}
if(!sk_push(dso->meth_data, (char *)ptr))
{
DSOerr(DSO_F_DL_LOAD,DSO_R_STACK_ERROR);
goto err;
}
/* Success, stick the converted filename we've loaded under into the DSO
* (it also serves as the indicator that we are currently loaded). */
dso->loaded_filename = filename;
return(1);
err:
/* Cleanup! */
if(filename != NULL)
OPENSSL_free(filename);
if(ptr != NULL)
shl_unload(ptr);
return(0);
}
static int dl_unload(DSO *dso)
{
shl_t ptr;
if(dso == NULL)
{
DSOerr(DSO_F_DL_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
return(0);
}
if(sk_num(dso->meth_data) < 1)
return(1);
/* Is this statement legal? */
ptr = (shl_t)sk_pop(dso->meth_data);
if(ptr == NULL)
{
DSOerr(DSO_F_DL_UNLOAD,DSO_R_NULL_HANDLE);
/* Should push the value back onto the stack in
* case of a retry. */
sk_push(dso->meth_data, (char *)ptr);
return(0);
}
shl_unload(ptr);
return(1);
}
static void *dl_bind_var(DSO *dso, const char *symname)
{
shl_t ptr;
void *sym;
if((dso == NULL) || (symname == NULL))
{
DSOerr(DSO_F_DL_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
if(sk_num(dso->meth_data) < 1)
{
DSOerr(DSO_F_DL_BIND_VAR,DSO_R_STACK_ERROR);
return(NULL);
}
ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
if(ptr == NULL)
{
DSOerr(DSO_F_DL_BIND_VAR,DSO_R_NULL_HANDLE);
return(NULL);
}
if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
{
DSOerr(DSO_F_DL_BIND_VAR,DSO_R_SYM_FAILURE);
ERR_add_error_data(4, "symname(", symname, "): ",
strerror(errno));
return(NULL);
}
return(sym);
}
static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
{
shl_t ptr;
void *sym;
if((dso == NULL) || (symname == NULL))
{
DSOerr(DSO_F_DL_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
if(sk_num(dso->meth_data) < 1)
{
DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_STACK_ERROR);
return(NULL);
}
ptr = (shl_t)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
if(ptr == NULL)
{
DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_NULL_HANDLE);
return(NULL);
}
if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0)
{
DSOerr(DSO_F_DL_BIND_FUNC,DSO_R_SYM_FAILURE);
ERR_add_error_data(4, "symname(", symname, "): ",
strerror(errno));
return(NULL);
}
return((DSO_FUNC_TYPE)sym);
}
static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
{
char *merged;
if(!filespec1 && !filespec2)
{
DSOerr(DSO_F_DL_MERGER,
ERR_R_PASSED_NULL_PARAMETER);
return(NULL);
}
/* If the first file specification is a rooted path, it rules.
same goes if the second file specification is missing. */
if (!filespec2 || filespec1[0] == '/')
{
merged = OPENSSL_malloc(strlen(filespec1) + 1);
if(!merged)
{
DSOerr(DSO_F_DL_MERGER,
ERR_R_MALLOC_FAILURE);
return(NULL);
}
strcpy(merged, filespec1);
}
/* If the first file specification is missing, the second one rules. */
else if (!filespec1)
{
merged = OPENSSL_malloc(strlen(filespec2) + 1);
if(!merged)
{
DSOerr(DSO_F_DL_MERGER,
ERR_R_MALLOC_FAILURE);
return(NULL);
}
strcpy(merged, filespec2);
}
else
/* This part isn't as trivial as it looks. It assumes that
the second file specification really is a directory, and
makes no checks whatsoever. Therefore, the result becomes
the concatenation of filespec2 followed by a slash followed
by filespec1. */
{
int spec2len, len;
spec2len = (filespec2 ? strlen(filespec2) : 0);
len = spec2len + (filespec1 ? strlen(filespec1) : 0);
if(filespec2 && filespec2[spec2len - 1] == '/')
{
spec2len--;
len--;
}
merged = OPENSSL_malloc(len + 2);
if(!merged)
{
DSOerr(DSO_F_DL_MERGER,
ERR_R_MALLOC_FAILURE);
return(NULL);
}
strcpy(merged, filespec2);
merged[spec2len] = '/';
strcpy(&merged[spec2len + 1], filespec1);
}
return(merged);
}
/* This function is identical to the one in dso_dlfcn.c, but as it is highly
* unlikely that both the "dl" *and* "dlfcn" variants are being compiled at the
* same time, there's no great duplicating the code. Figuring out an elegant
* way to share one copy of the code would be more difficult and would not
* leave the implementations independant. */
#if defined(__hpux)
static const char extension[] = ".sl";
#else
static const char extension[] = ".so";
#endif
static char *dl_name_converter(DSO *dso, const char *filename)
{
char *translated;
int len, rsize, transform;
len = strlen(filename);
rsize = len + 1;
transform = (strstr(filename, "/") == NULL);
{
/* We will convert this to "%s.s?" or "lib%s.s?" */
rsize += strlen(extension);/* The length of ".s?" */
if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
rsize += 3; /* The length of "lib" */
}
translated = OPENSSL_malloc(rsize);
if(translated == NULL)
{
DSOerr(DSO_F_DL_NAME_CONVERTER,
DSO_R_NAME_TRANSLATION_FAILED);
return(NULL);
}
if(transform)
{
if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
sprintf(translated, "lib%s%s", filename, extension);
else
sprintf(translated, "%s%s", filename, extension);
}
else
sprintf(translated, "%s", filename);
return(translated);
}
#endif /* DSO_DL */