fis-gtm/sr_unix/gtmcrypt_entry.c

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/****************************************************************
* *
* Copyright 2009, 2011 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_string.h"
#include "gtm_limits.h"
#include <dlfcn.h>
#include "lv_val.h" /* needed for "fgncal.h" */
#include "fgncal.h" /* needed for COPY_DLLERR_MSG() */
#include "gtmmsg.h"
#include "gtm_stdio.h"
#include "gtm_stdlib.h"
#include "real_len.h"
#include "gtmcrypt.h"
#ifndef GTM_DIST
#define GTM_DIST "gtm_dist"
#endif
GBLREF char dl_err[MAX_ERRSTR_LEN];
GBLREF int4 gbl_encryption_ecode;
void gtmcrypt_entry()
{
char *libname, err_msg[MAX_ERRSTR_LEN];
void_ptr_t handle;
char_ptr_t err_str;
char *gtmcryptlib_fname[] = {
GTMCRYPT_INIT_FNAME,
GTMCRYPT_CLOSE_FNAME,
GTMCRYPT_HASH_GEN_FNAME,
GTMCRYPT_ENCODE_FNAME,
GTMCRYPT_DECODE_FNAME,
GTMCRYPT_GETKEY_BY_NAME,
GTMCRYPT_GETKEY_BY_HASH,
GTMCRYPT_STRERROR
};
void **gtmcryptlib_fptr[] = {
(void **)&gtmcrypt_init_fnptr,
(void **)&gtmcrypt_close_fnptr,
(void **)&gtmcrypt_hash_gen_fnptr,
(void **)&gtmcrypt_encode_fnptr,
(void **)&gtmcrypt_decode_fnptr,
(void **)&gtmcrypt_getkey_by_name_fnptr,
(void **)&gtmcrypt_getkey_by_hash_fnptr,
(void **)&gtmcrypt_strerror_fnptr
};
int findx;
int num_dlsyms = SIZEOF(gtmcryptlib_fptr) / SIZEOF(gtmcryptlib_fptr[0]); /* number of functions in library */
void *fptr;
char *gtm_dist_path;
char libpath[GTM_PATH_MAX];
error_def(ERR_CRYPTDLNOOPEN);
error_def(ERR_GTMDISTUNDEF);
if (NULL == (gtm_dist_path = getenv(GTM_DIST)))
rts_error(VARLSTCNT(1) ERR_GTMDISTUNDEF);
memset(libpath, 0, GTM_PATH_MAX);
SNPRINTF(libpath, GTM_PATH_MAX, "%s/%s/%s", gtm_dist_path, "plugin", GTMCRYPT_LIBNAME);
gbl_encryption_ecode = 0;
handle = dlopen(libpath, GTMCRYPT_LIBFLAGS);
if (NULL == handle)
{
COPY_DLLERR_MSG(err_str, dl_err);
gbl_encryption_ecode = ERR_CRYPTDLNOOPEN; /* library initialization failed */
return;
}
for(findx = 0; findx < num_dlsyms; ++findx)
{
fptr = (void *)dlsym(handle, gtmcryptlib_fname[findx]);
if (NULL == fptr)
{
COPY_DLLERR_MSG(err_str, dl_err);
gbl_encryption_ecode = ERR_CRYPTDLNOOPEN; /* library initialization failed */
return;
}
*gtmcryptlib_fptr[findx] = fptr;
}
return;
}