- New utility library libpkcs11 - supposed to provide easy loading and
unloading of modules, and possibly a few other features in the future. Needed by pkcs11-tool git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@773 c6295689-39f2-0310-b995-f0e70906c6a9
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okir
parent
d997440546
commit
317a0663c9
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/*
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* Convenience pkcs11 library that can be linked into an application,
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* and will bind to a specific pkcs11 module.
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*
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* Copyright (C) 2002 Olaf Kirch <okir@lst.de>
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*/
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#include "pkcs11.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#define MAGIC 0xd00bed00
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struct sc_pkcs11_module {
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unsigned int _magic;
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#if defined(linux)
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void * _dl_handle;
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#endif
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};
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static int sys_dlopen(sc_pkcs11_module_t *, const char *);
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static int sys_dlclose(sc_pkcs11_module_t *);
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static void * sys_dlsym(sc_pkcs11_module_t *, const char *);
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/*
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* Load a module - this will load the shared object, call
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* C_Initialize, and get the list of function pointers
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*/
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sc_pkcs11_module_t *
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C_LoadModule(const char *mspec, CK_FUNCTION_LIST_PTR_PTR funcs)
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{
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sc_pkcs11_module_t *mod;
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CK_RV (*c_get_function_list)(CK_FUNCTION_LIST_PTR_PTR);
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int rv;
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mod = (sc_pkcs11_module_t *) calloc(1, sizeof(*mod));
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mod->_magic = MAGIC;
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if (sys_dlopen(mod, mspec) < 0)
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goto failed;
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/* Get the list of function pointers */
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c_get_function_list = (CK_RV (*)(CK_FUNCTION_LIST_PTR_PTR))
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sys_dlsym(mod, "C_GetFunctionList");
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if (!c_get_function_list)
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goto failed;
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rv = c_get_function_list(funcs);
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if (rv == CKR_OK)
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return mod;
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failed: C_UnloadModule(mod);
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return NULL;
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}
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/*
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* Unload a pkcs11 module.
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* The calling application is responsible for cleaning up
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* and calling C_Finalize
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*/
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CK_RV
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C_UnloadModule(sc_pkcs11_module_t *mod)
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{
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if (!mod || mod->_magic != MAGIC)
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return CKR_ARGUMENTS_BAD;
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if (sys_dlclose(mod) < 0)
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return CKR_FUNCTION_FAILED;
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memset(mod, 0, sizeof(*mod));
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free(mod);
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return CKR_OK;
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}
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#ifdef linux
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#include <dlfcn.h>
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/*
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* Module loader for platforms that have dlopen
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*
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* This is intentionally primitive; we may want a more
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* elaborate loader in libopensc one day
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*/
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int
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sys_dlopen(struct sc_pkcs11_module *mod, const char *name)
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{
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const char **dir, *ldlist[64];
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char pathbuf[4096], *ldenv;
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unsigned int n = 0;
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if ((ldenv = getenv("LD_LIBRARY_PATH"))
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&& (ldenv = strdup(ldenv))) {
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ldlist[n] = strtok(ldenv, ":");
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while (ldlist[n] != NULL && ++n < 63)
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ldlist[n] = strtok(NULL, ":");
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}
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ldlist[n] = NULL;
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if (name == NULL)
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name = "opensc-pkcs11.so";
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for (dir = ldlist; *dir; dir++) {
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snprintf(pathbuf, sizeof(pathbuf), "%s/%s", *dir, name);
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mod->_dl_handle = dlopen(pathbuf, RTLD_NOW);
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if (mod->_dl_handle != NULL)
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break;
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}
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if (mod->_dl_handle == NULL)
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mod->_dl_handle = dlopen(name, RTLD_NOW);
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if (ldenv)
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free(ldenv);
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return (mod->_dl_handle? 0 : -1);
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}
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int
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sys_dlclose(struct sc_pkcs11_module *mod)
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{
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if (mod->_dl_handle)
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dlclose(mod->_dl_handle);
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mod->_dl_handle = NULL;
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return 0;
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}
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void *
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sys_dlsym(sc_pkcs11_module_t *mod, const char *name)
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{
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if (!mod->_dl_handle)
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return NULL;
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return dlsym(mod->_dl_handle, name);
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}
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#endif
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@ -0,0 +1,48 @@
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/*
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* pkcs11.h: OpenSC project's PKCS#11 library header
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*
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* Copyright (C) 2002 Timo Teräs <timo.teras@iki.fi>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef OPENSC_PKCS11_H
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#define OPENSC_PKCS11_H
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#ifndef _WIN32
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#include <opensc/rsaref/unix.h>
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#include <opensc/rsaref/pkcs11.h>
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#else
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#include <opensc/rsaref/win32.h>
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#pragma pack(push, cryptoki, 1)
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#include <opensc/rsaref/pkcs11.h>
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#pragma pack(pop, cryptoki)
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct sc_pkcs11_module sc_pkcs11_module_t;
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extern sc_pkcs11_module_t *C_LoadModule(const char *name,
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CK_FUNCTION_LIST_PTR_PTR);
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extern CK_RV C_UnloadModule(sc_pkcs11_module_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif
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