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- /* dso.h */
- /* 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).
- *
- */
-
- #ifndef HEADER_DSO_H
- #define HEADER_DSO_H
-
- #include <openssl/crypto.h>
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /* These values are used as commands to DSO_ctrl() */
- #define DSO_CTRL_GET_FLAGS 1
- #define DSO_CTRL_SET_FLAGS 2
- #define DSO_CTRL_OR_FLAGS 3
-
- /* These flags control the translation of file-names from canonical to
- * native. Eg. in the CryptoSwift support, the "dl" and "dlfcn"
- * methods will translate "swift" -> "libswift.so" whereas the "win32"
- * method will translate "swift" -> "swift.dll". NB: Until I can figure
- * out how to be more "conventional" with this, the methods will only
- * honour this flag if it looks like it was passed a file without any
- * path and if the filename is small enough.
- */
- #define DSO_FLAG_NAME_TRANSLATION 0x01
-
- /* The following flag controls the translation of symbol names to upper
- * case. This is currently only being implemented for OpenVMS.
- */
- #define DSO_FLAG_UPCASE_SYMBOL 0x02
-
-
- typedef void (*DSO_FUNC_TYPE)(void);
-
- typedef struct dso_st DSO;
-
- typedef struct dso_meth_st
- {
- const char *name;
- /* Loads a shared library */
- int (*dso_load)(DSO *dso, const char *filename);
- /* Unloads a shared library */
- int (*dso_unload)(DSO *dso);
- /* Binds a variable */
- void *(*dso_bind_var)(DSO *dso, const char *symname);
- /* Binds a function - assumes a return type of DSO_FUNC_TYPE.
- * This should be cast to the real function prototype by the
- * caller. Platforms that don't have compatible representations
- * for different prototypes (this is possible within ANSI C)
- * are highly unlikely to have shared libraries at all, let
- * alone a DSO_METHOD implemented for them. */
- DSO_FUNC_TYPE (*dso_bind_func)(DSO *dso, const char *symname);
-
- /* I don't think this would actually be used in any circumstances. */
- #if 0
- /* Unbinds a variable */
- int (*dso_unbind_var)(DSO *dso, char *symname, void *symptr);
- /* Unbinds a function */
- int (*dso_unbind_func)(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
- #endif
- /* The generic (yuck) "ctrl()" function. NB: Negative return
- * values (rather than zero) indicate errors. */
- long (*dso_ctrl)(DSO *dso, int cmd, long larg, void *parg);
-
- /* [De]Initialisation handlers. */
- int (*init)(DSO *dso);
- int (*finish)(DSO *dso);
- } DSO_METHOD;
-
- /**********************************************************************/
- /* The low-level handle type used to refer to a loaded shared library */
-
- struct dso_st
- {
- DSO_METHOD *meth;
- /* Standard dlopen uses a (void *). Win32 uses a HANDLE. VMS
- * doesn't use anything but will need to cache the filename
- * for use in the dso_bind handler. All in all, let each
- * method control its own destiny. "Handles" and such go in
- * a STACK. */
- STACK *meth_data;
- int references;
- int flags;
- /* For use by applications etc ... use this for your bits'n'pieces,
- * don't touch meth_data! */
- CRYPTO_EX_DATA ex_data;
- };
-
-
- DSO * DSO_new(void);
- DSO * DSO_new_method(DSO_METHOD *method);
- int DSO_free(DSO *dso);
- int DSO_flags(DSO *dso);
- int DSO_up(DSO *dso);
- long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg);
-
- void DSO_set_default_method(DSO_METHOD *meth);
- DSO_METHOD *DSO_get_default_method(void);
- DSO_METHOD *DSO_get_method(DSO *dso);
- DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth);
-
- /* The all-singing all-dancing load function, you normally pass NULL
- * for the first and third parameters. Use DSO_up and DSO_free for
- * subsequent reference count handling. Any flags passed in will be set
- * in the constructed DSO after its init() function but before the
- * load operation. This will be done with;
- * DSO_ctrl(dso, DSO_CTRL_SET_FLAGS, flags, NULL); */
- DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags);
-
- /* This function binds to a variable inside a shared library. */
- void *DSO_bind_var(DSO *dso, const char *symname);
-
- /* This function binds to a function inside a shared library. */
- DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname);
-
- /* This method is the default, but will beg, borrow, or steal whatever
- * method should be the default on any particular platform (including
- * DSO_METH_null() if necessary). */
- DSO_METHOD *DSO_METHOD_openssl(void);
-
- /* This method is defined for all platforms - if a platform has no
- * DSO support then this will be the only method! */
- DSO_METHOD *DSO_METHOD_null(void);
-
- /* If DSO_DLFCN is defined, the standard dlfcn.h-style functions
- * (dlopen, dlclose, dlsym, etc) will be used and incorporated into
- * this method. If not, this method will return NULL. */
- DSO_METHOD *DSO_METHOD_dlfcn(void);
-
- /* If DSO_DL is defined, the standard dl.h-style functions (shl_load,
- * shl_unload, shl_findsym, etc) will be used and incorporated into
- * this method. If not, this method will return NULL. */
- DSO_METHOD *DSO_METHOD_dl(void);
-
- /* If WIN32 is defined, use DLLs. If not, return NULL. */
- DSO_METHOD *DSO_METHOD_win32(void);
-
- /* If VMS is defined, use shared images. If not, return NULL. */
- DSO_METHOD *DSO_METHOD_vms(void);
-
- /* BEGIN ERROR CODES */
- /* The following lines are auto generated by the script mkerr.pl. Any changes
- * made after this point may be overwritten when the script is next run.
- */
- void ERR_load_DSO_strings(void);
-
- /* Error codes for the DSO functions. */
-
- /* Function codes. */
- #define DSO_F_DLFCN_BIND_FUNC 100
- #define DSO_F_DLFCN_BIND_VAR 101
- #define DSO_F_DLFCN_CTRL 102
- #define DSO_F_DLFCN_LOAD 103
- #define DSO_F_DLFCN_UNLOAD 104
- #define DSO_F_DL_BIND_FUNC 105
- #define DSO_F_DL_BIND_VAR 106
- #define DSO_F_DL_CTRL 107
- #define DSO_F_DL_LOAD 108
- #define DSO_F_DL_UNLOAD 109
- #define DSO_F_DSO_BIND_FUNC 110
- #define DSO_F_DSO_BIND_VAR 111
- #define DSO_F_DSO_CTRL 112
- #define DSO_F_DSO_FREE 113
- #define DSO_F_DSO_LOAD 114
- #define DSO_F_DSO_NEW_METHOD 115
- #define DSO_F_DSO_UP 116
- #define DSO_F_VMS_BIND_VAR 122
- #define DSO_F_VMS_CTRL 123
- #define DSO_F_VMS_LOAD 124
- #define DSO_F_VMS_UNLOAD 125
- #define DSO_F_WIN32_BIND_FUNC 117
- #define DSO_F_WIN32_BIND_VAR 118
- #define DSO_F_WIN32_CTRL 119
- #define DSO_F_WIN32_LOAD 120
- #define DSO_F_WIN32_UNLOAD 121
-
- /* Reason codes. */
- #define DSO_R_CTRL_FAILED 100
- #define DSO_R_FILENAME_TOO_BIG 109
- #define DSO_R_FINISH_FAILED 101
- #define DSO_R_LOAD_FAILED 102
- #define DSO_R_NULL_HANDLE 103
- #define DSO_R_STACK_ERROR 104
- #define DSO_R_SYM_FAILURE 105
- #define DSO_R_UNKNOWN_COMMAND 106
- #define DSO_R_UNLOAD_FAILED 107
- #define DSO_R_UNSUPPORTED 108
-
- #ifdef __cplusplus
- }
- #endif
- #endif
-