diff options
author | Geoff Thorpe <geoff@openssl.org> | 2000-04-04 21:57:11 +0000 |
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committer | Geoff Thorpe <geoff@openssl.org> | 2000-04-04 21:57:11 +0000 |
commit | 8f4fac7f965b4604bc71be4bd486a8641c0504ab (patch) | |
tree | 9994f9cd3c12be7a390c1c7b11aad884e93cc8e0 /crypto/dso/dso.h | |
parent | 02859fb74ac980303994dd46c28e0cd2211aba12 (diff) | |
download | openssl-8f4fac7f965b4604bc71be4bd486a8641c0504ab.tar.gz |
This is a set of startup code for the DSO support, it's not yet linked into
the build process (an upcoming commit no doubt), and is very much *new*
code - what that means is that it compiles ok - usually. It certainly
doesn't mean it runs well or even properly yet. Please don't muck round
with this unless you're looking to help out and hunt bugs. :-)
Currently this code doesn't have any support for controlling the "load"
behaviour (eg. paths, filename translations, etc). That'll be handled
using DSO_ctrl() and various flags, once we work out a sensible set of
flags.
Diffstat (limited to 'crypto/dso/dso.h')
-rw-r--r-- | crypto/dso/dso.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/crypto/dso/dso.h b/crypto/dso/dso.h new file mode 100644 index 0000000000..5f86eb3ff8 --- /dev/null +++ b/crypto/dso/dso.h @@ -0,0 +1,191 @@ +/* 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 + + +typedef struct dso_st DSO; + +typedef struct dso_meth_st + { + const char *name; + /* Loads a shared library */ + int (*dso_load)(DSO *dso, char *filename); + /* Unloads a shared library */ + int (*dso_unload)(DSO *dso); + /* Binds a function, variable, or whatever */ + int (*dso_bind)(DSO *dso, char *symname, void **symptr); + +/* I don't think this would actually be used in any circumstances. */ +#if 0 + /* Unbinds a symbol */ + int (*dso_unbind)(DSO *dso, char *symname, void *symptr); +#endif + + 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); + +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 last two parameters. Use DSO_up and DSO_free for reference + * count handling. */ +DSO *DSO_load(DSO *dso, char *filename, DSO_METHOD *meth); + +/* This function binds to a function, variable, whatever inside a + * shared library. */ +void *DSO_bind(DSO *dso, 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); + +void ERR_load_DSO_strings(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. + */ + +/* Error codes for the DSO functions. */ + +/* Function codes. */ +#define DSO_F_DLFCN_BIND 100 +#define DSO_F_DLFCN_LOAD 101 +#define DSO_F_DLFCN_UNLOAD 102 +#define DSO_F_DL_BIND 103 +#define DSO_F_DL_LOAD 104 +#define DSO_F_DL_UNLOAD 105 +#define DSO_F_DSO_BIND 106 +#define DSO_F_DSO_FREE 107 +#define DSO_F_DSO_LOAD 108 +#define DSO_F_DSO_NEW_METHOD 109 +#define DSO_F_DSO_UP 110 +#define DSO_F_WIN32_BIND 111 +#define DSO_F_WIN32_LOAD 112 +#define DSO_F_WIN32_UNLOAD 113 + +/* Reason codes. */ +#define DSO_R_FINISH_FAILED 100 +#define DSO_R_LOAD_FAILED 101 +#define DSO_R_NULL_HANDLE 102 +#define DSO_R_STACK_ERROR 103 +#define DSO_R_SYM_FAILURE 104 +#define DSO_R_UNLOAD_FAILED 105 +#define DSO_R_UNSUPPORTED 106 + +#ifdef __cplusplus +} +#endif +#endif + |