b9e6391582
technique used is far from perfect and alternatives are welcome.
Basically if the translation flag is set, the string is not too
long, and there appears to be no path information in the string,
then it is converted to whatever the standard should be for the
DSO_METHOD in question, eg;
blah --> libblah.so on *nix, and
blah --> blah.dll on win32.
This change also introduces the DSO_ctrl() function that is used
by the name translation stuff.
219 lines
7.8 KiB
C
219 lines
7.8 KiB
C
/* dso.h */
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/* Written by Geoff Thorpe (geoff@geoffthorpe.net) 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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#ifndef HEADER_DSO_H
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#define HEADER_DSO_H
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#include <openssl/crypto.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* These values are used as commands to DSO_ctrl() */
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#define DSO_CTRL_GET_FLAGS 1
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#define DSO_CTRL_SET_FLAGS 2
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#define DSO_CTRL_OR_FLAGS 3
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/* These flags control the translation of file-names from canonical to
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* native. Eg. in the CryptoSwift support, the "dl" and "dlfcn"
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* methods will translate "swift" -> "libswift.so" whereas the "win32"
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* method will translate "swift" -> "swift.dll". NB: Until I can figure
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* out how to be more "conventional" with this, the methods will only
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* honour this flag if it looks like it was passed a file without any
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* path and if the filename is small enough.
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*/
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#define DSO_FLAG_NAME_TRANSLATION 0x01
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typedef struct dso_st DSO;
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typedef struct dso_meth_st
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{
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const char *name;
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/* Loads a shared library */
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int (*dso_load)(DSO *dso, const char *filename);
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/* Unloads a shared library */
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int (*dso_unload)(DSO *dso);
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/* Binds a function, variable, or whatever */
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int (*dso_bind)(DSO *dso, const char *symname, void **symptr);
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/* I don't think this would actually be used in any circumstances. */
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#if 0
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/* Unbinds a symbol */
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int (*dso_unbind)(DSO *dso, char *symname, void *symptr);
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#endif
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/* The generic (yuck) "ctrl()" function. NB: Negative return
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* values (rather than zero) indicate errors. */
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long (*dso_ctrl)(DSO *dso, int cmd, long larg, void *parg);
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/* [De]Initialisation handlers. */
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int (*init)(DSO *dso);
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int (*finish)(DSO *dso);
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} DSO_METHOD;
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/**********************************************************************/
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/* The low-level handle type used to refer to a loaded shared library */
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struct dso_st
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{
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DSO_METHOD *meth;
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/* Standard dlopen uses a (void *). Win32 uses a HANDLE. VMS
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* doesn't use anything but will need to cache the filename
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* for use in the dso_bind handler. All in all, let each
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* method control its own destiny. "Handles" and such go in
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* a STACK. */
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STACK *meth_data;
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int references;
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int flags;
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/* For use by applications etc ... use this for your bits'n'pieces,
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* don't touch meth_data! */
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CRYPTO_EX_DATA ex_data;
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};
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DSO * DSO_new(void);
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DSO * DSO_new_method(DSO_METHOD *method);
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int DSO_free(DSO *dso);
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int DSO_flags(DSO *dso);
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int DSO_up(DSO *dso);
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long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg);
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void DSO_set_default_method(DSO_METHOD *meth);
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DSO_METHOD *DSO_get_default_method(void);
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DSO_METHOD *DSO_get_method(DSO *dso);
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DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth);
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/* The all-singing all-dancing load function, you normally pass NULL
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* for the first and third parameters. Use DSO_up and DSO_free for
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* subsequent reference count handling. Any flags passed in will be set
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* in the constructed DSO after its init() function but before the
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* load operation. This will be done with;
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* DSO_ctrl(dso, DSO_CTRL_SET_FLAGS, flags, NULL); */
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DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags);
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/* This function binds to a function, variable, whatever inside a
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* shared library. */
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void *DSO_bind(DSO *dso, const char *symname);
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/* This method is the default, but will beg, borrow, or steal whatever
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* method should be the default on any particular platform (including
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* DSO_METH_null() if necessary). */
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DSO_METHOD *DSO_METHOD_openssl(void);
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/* This method is defined for all platforms - if a platform has no
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* DSO support then this will be the only method! */
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DSO_METHOD *DSO_METHOD_null(void);
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/* If DSO_DLFCN is defined, the standard dlfcn.h-style functions
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* (dlopen, dlclose, dlsym, etc) will be used and incorporated into
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* this method. If not, this method will return NULL. */
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DSO_METHOD *DSO_METHOD_dlfcn(void);
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/* If DSO_DL is defined, the standard dl.h-style functions (shl_load,
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* shl_unload, shl_findsym, etc) will be used and incorporated into
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* this method. If not, this method will return NULL. */
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DSO_METHOD *DSO_METHOD_dl(void);
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/* If WIN32 is defined, use DLLs. If not, return NULL. */
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DSO_METHOD *DSO_METHOD_win32(void);
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void ERR_load_DSO_strings(void);
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/* BEGIN ERROR CODES */
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/* The following lines are auto generated by the script mkerr.pl. Any changes
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* made after this point may be overwritten when the script is next run.
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*/
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/* Error codes for the DSO functions. */
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/* Function codes. */
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#define DSO_F_DLFCN_BIND 100
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#define DSO_F_DLFCN_LOAD 101
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#define DSO_F_DLFCN_UNLOAD 102
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#define DSO_F_DLFCN_CTRL 103
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#define DSO_F_DL_BIND 104
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#define DSO_F_DL_LOAD 105
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#define DSO_F_DL_UNLOAD 106
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#define DSO_F_DL_CTRL 107
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#define DSO_F_DSO_BIND 108
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#define DSO_F_DSO_FREE 109
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#define DSO_F_DSO_LOAD 110
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#define DSO_F_DSO_NEW_METHOD 111
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#define DSO_F_DSO_UP 112
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#define DSO_F_DSO_CTRL 113
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#define DSO_F_WIN32_BIND 114
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#define DSO_F_WIN32_LOAD 115
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#define DSO_F_WIN32_UNLOAD 116
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#define DSO_F_WIN32_CTRL 117
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/* Reason codes. */
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#define DSO_R_FINISH_FAILED 100
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#define DSO_R_LOAD_FAILED 101
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#define DSO_R_NULL_HANDLE 102
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#define DSO_R_STACK_ERROR 103
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#define DSO_R_SYM_FAILURE 104
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#define DSO_R_UNLOAD_FAILED 105
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#define DSO_R_UNSUPPORTED 106
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#define DSO_R_UNKNOWN_COMMAND 107
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#define DSO_R_CTRL_FAILED 108
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#ifdef __cplusplus
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}
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#endif
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#endif
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