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authorSimon L. B. Nielsen <simon@FreeBSD.org>2008-08-23 10:51:00 +0000
committerSimon L. B. Nielsen <simon@FreeBSD.org>2008-08-23 10:51:00 +0000
commitc4a78426bef17a0a7c81195c2b2399e7441f14ad (patch)
tree596c39f00d5968b1519e8cd7f0546412b14c20f0 /crypto/dso/dso.h
parenta0ddfe4e7233d81e88a86217b7653708db2720fa (diff)
downloadsrc-c4a78426bef17a0a7c81195c2b2399e7441f14ad.tar.gz
src-c4a78426bef17a0a7c81195c2b2399e7441f14ad.zip
Flatten OpenSSL vendor tree.
Notes
Notes: svn path=/vendor-crypto/openssl/dist/; revision=182044
Diffstat (limited to 'crypto/dso/dso.h')
-rw-r--r--crypto/dso/dso.h368
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+/* dso.h -*- mode:C; c-file-style: "eay" -*- */
+/* 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
+
+/* By default, DSO_load() will translate the provided filename into a form
+ * typical for the platform (more specifically the DSO_METHOD) using the
+ * dso_name_converter function of the method. Eg. win32 will transform "blah"
+ * into "blah.dll", and dlfcn will transform it into "libblah.so". The
+ * behaviour can be overriden by setting the name_converter callback in the DSO
+ * object (using DSO_set_name_converter()). This callback could even utilise
+ * the DSO_METHOD's converter too if it only wants to override behaviour for
+ * one or two possible DSO methods. However, the following flag can be set in a
+ * DSO to prevent *any* native name-translation at all - eg. if the caller has
+ * prompted the user for a path to a driver library so the filename should be
+ * interpreted as-is. */
+#define DSO_FLAG_NO_NAME_TRANSLATION 0x01
+/* An extra flag to give if only the extension should be added as
+ * translation. This is obviously only of importance on Unix and
+ * other operating systems where the translation also may prefix
+ * the name with something, like 'lib', and ignored everywhere else.
+ * This flag is also ignored if DSO_FLAG_NO_NAME_TRANSLATION is used
+ * at the same time. */
+#define DSO_FLAG_NAME_TRANSLATION_EXT_ONLY 0x02
+
+/* 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 0x10
+
+/* This flag loads the library with public symbols.
+ * Meaning: The exported symbols of this library are public
+ * to all libraries loaded after this library.
+ * At the moment only implemented in unix.
+ */
+#define DSO_FLAG_GLOBAL_SYMBOLS 0x20
+
+
+typedef void (*DSO_FUNC_TYPE)(void);
+
+typedef struct dso_st DSO;
+
+/* The function prototype used for method functions (or caller-provided
+ * callbacks) that transform filenames. They are passed a DSO structure pointer
+ * (or NULL if they are to be used independantly of a DSO object) and a
+ * filename to transform. They should either return NULL (if there is an error
+ * condition) or a newly allocated string containing the transformed form that
+ * the caller will need to free with OPENSSL_free() when done. */
+typedef char* (*DSO_NAME_CONVERTER_FUNC)(DSO *, const char *);
+/* The function prototype used for method functions (or caller-provided
+ * callbacks) that merge two file specifications. They are passed a
+ * DSO structure pointer (or NULL if they are to be used independantly of
+ * a DSO object) and two file specifications to merge. They should
+ * either return NULL (if there is an error condition) or a newly allocated
+ * string containing the result of merging that the caller will need
+ * to free with OPENSSL_free() when done.
+ * Here, merging means that bits and pieces are taken from each of the
+ * file specifications and added together in whatever fashion that is
+ * sensible for the DSO method in question. The only rule that really
+ * applies is that if the two specification contain pieces of the same
+ * type, the copy from the first string takes priority. One could see
+ * it as the first specification is the one given by the user and the
+ * second being a bunch of defaults to add on if they're missing in the
+ * first. */
+typedef char* (*DSO_MERGER_FUNC)(DSO *, const char *, const char *);
+
+typedef struct dso_meth_st
+ {
+ const char *name;
+ /* Loads a shared library, NB: new DSO_METHODs must ensure that a
+ * successful load populates the loaded_filename field, and likewise a
+ * successful unload OPENSSL_frees and NULLs it out. */
+ int (*dso_load)(DSO *dso);
+ /* 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);
+ /* The default DSO_METHOD-specific function for converting filenames to
+ * a canonical native form. */
+ DSO_NAME_CONVERTER_FUNC dso_name_converter;
+ /* The default DSO_METHOD-specific function for converting filenames to
+ * a canonical native form. */
+ DSO_MERGER_FUNC dso_merger;
+
+ /* [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;
+ /* If this callback function pointer is set to non-NULL, then it will
+ * be used in DSO_load() in place of meth->dso_name_converter. NB: This
+ * should normally set using DSO_set_name_converter(). */
+ DSO_NAME_CONVERTER_FUNC name_converter;
+ /* If this callback function pointer is set to non-NULL, then it will
+ * be used in DSO_load() in place of meth->dso_merger. NB: This
+ * should normally set using DSO_set_merger(). */
+ DSO_MERGER_FUNC merger;
+ /* This is populated with (a copy of) the platform-independant
+ * filename used for this DSO. */
+ char *filename;
+ /* This is populated with (a copy of) the translated filename by which
+ * the DSO was actually loaded. It is NULL iff the DSO is not currently
+ * loaded. NB: This is here because the filename translation process
+ * may involve a callback being invoked more than once not only to
+ * convert to a platform-specific form, but also to try different
+ * filenames in the process of trying to perform a load. As such, this
+ * variable can be used to indicate (a) whether this DSO structure
+ * corresponds to a loaded library or not, and (b) the filename with
+ * which it was actually loaded. */
+ char *loaded_filename;
+ };
+
+
+DSO * DSO_new(void);
+DSO * DSO_new_method(DSO_METHOD *method);
+int DSO_free(DSO *dso);
+int DSO_flags(DSO *dso);
+int DSO_up_ref(DSO *dso);
+long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg);
+
+/* This function sets the DSO's name_converter callback. If it is non-NULL,
+ * then it will be used instead of the associated DSO_METHOD's function. If
+ * oldcb is non-NULL then it is set to the function pointer value being
+ * replaced. Return value is non-zero for success. */
+int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
+ DSO_NAME_CONVERTER_FUNC *oldcb);
+/* These functions can be used to get/set the platform-independant filename
+ * used for a DSO. NB: set will fail if the DSO is already loaded. */
+const char *DSO_get_filename(DSO *dso);
+int DSO_set_filename(DSO *dso, const char *filename);
+/* This function will invoke the DSO's name_converter callback to translate a
+ * filename, or if the callback isn't set it will instead use the DSO_METHOD's
+ * converter. If "filename" is NULL, the "filename" in the DSO itself will be
+ * used. If the DSO_FLAG_NO_NAME_TRANSLATION flag is set, then the filename is
+ * simply duplicated. NB: This function is usually called from within a
+ * DSO_METHOD during the processing of a DSO_load() call, and is exposed so that
+ * caller-created DSO_METHODs can do the same thing. A non-NULL return value
+ * will need to be OPENSSL_free()'d. */
+char *DSO_convert_filename(DSO *dso, const char *filename);
+/* This function will invoke the DSO's merger callback to merge two file
+ * specifications, or if the callback isn't set it will instead use the
+ * DSO_METHOD's merger. A non-NULL return value will need to be
+ * OPENSSL_free()'d. */
+char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2);
+/* If the DSO is currently loaded, this returns the filename that it was loaded
+ * under, otherwise it returns NULL. So it is also useful as a test as to
+ * whether the DSO is currently loaded. NB: This will not necessarily return
+ * the same value as DSO_convert_filename(dso, dso->filename), because the
+ * DSO_METHOD's load function may have tried a variety of filenames (with
+ * and/or without the aid of the converters) before settling on the one it
+ * actually loaded. */
+const char *DSO_get_loaded_filename(DSO *dso);
+
+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. If 'dso' is non-NULL, 'flags' is ignored. */
+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_LOAD 102
+#define DSO_F_DLFCN_MERGER 130
+#define DSO_F_DLFCN_NAME_CONVERTER 123
+#define DSO_F_DLFCN_UNLOAD 103
+#define DSO_F_DL_BIND_FUNC 104
+#define DSO_F_DL_BIND_VAR 105
+#define DSO_F_DL_LOAD 106
+#define DSO_F_DL_MERGER 131
+#define DSO_F_DL_NAME_CONVERTER 124
+#define DSO_F_DL_UNLOAD 107
+#define DSO_F_DSO_BIND_FUNC 108
+#define DSO_F_DSO_BIND_VAR 109
+#define DSO_F_DSO_CONVERT_FILENAME 126
+#define DSO_F_DSO_CTRL 110
+#define DSO_F_DSO_FREE 111
+#define DSO_F_DSO_GET_FILENAME 127
+#define DSO_F_DSO_GET_LOADED_FILENAME 128
+#define DSO_F_DSO_LOAD 112
+#define DSO_F_DSO_MERGE 132
+#define DSO_F_DSO_NEW_METHOD 113
+#define DSO_F_DSO_SET_FILENAME 129
+#define DSO_F_DSO_SET_NAME_CONVERTER 122
+#define DSO_F_DSO_UP_REF 114
+#define DSO_F_VMS_BIND_SYM 115
+#define DSO_F_VMS_LOAD 116
+#define DSO_F_VMS_MERGER 133
+#define DSO_F_VMS_UNLOAD 117
+#define DSO_F_WIN32_BIND_FUNC 118
+#define DSO_F_WIN32_BIND_VAR 119
+#define DSO_F_WIN32_JOINER 135
+#define DSO_F_WIN32_LOAD 120
+#define DSO_F_WIN32_MERGER 134
+#define DSO_F_WIN32_NAME_CONVERTER 125
+#define DSO_F_WIN32_SPLITTER 136
+#define DSO_F_WIN32_UNLOAD 121
+
+/* Reason codes. */
+#define DSO_R_CTRL_FAILED 100
+#define DSO_R_DSO_ALREADY_LOADED 110
+#define DSO_R_EMPTY_FILE_STRUCTURE 113
+#define DSO_R_FAILURE 114
+#define DSO_R_FILENAME_TOO_BIG 101
+#define DSO_R_FINISH_FAILED 102
+#define DSO_R_INCORRECT_FILE_SYNTAX 115
+#define DSO_R_LOAD_FAILED 103
+#define DSO_R_NAME_TRANSLATION_FAILED 109
+#define DSO_R_NO_FILENAME 111
+#define DSO_R_NO_FILE_SPECIFICATION 116
+#define DSO_R_NULL_HANDLE 104
+#define DSO_R_SET_FILENAME_FAILED 112
+#define DSO_R_STACK_ERROR 105
+#define DSO_R_SYM_FAILURE 106
+#define DSO_R_UNLOAD_FAILED 107
+#define DSO_R_UNSUPPORTED 108
+
+#ifdef __cplusplus
+}
+#endif
+#endif