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/**
* Yudit Unicode Editor Source File
*
* GNU Copyright (C) 1997-2023 Gaspar Sinai <gaspar@yudit.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* dated June 1991. See file COPYYING for details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef USE_WINAPI
#include <windows.h>
#else
#include <stdlib.h>
#include <dlfcn.h>
#include <string.h>
#endif
#include <stoolkit/SIO.h>
#include <stoolkit/SEncoder.h>
#include <stoolkit/sedy/SSedy.h>
static SSedyFunctions functions;
static SString location;
static void* dynHandle = 0;
#if SEDY_BUILT_IN
#include <addon/yudit_sedy/yudit_sedy.h>
#else
#include <stoolkit/sedy/yudit_sedy.h>
static void fixFileName (SString& str)
{
#ifdef USE_WINAPI
str.replaceAll ("/", "\\");
if (str.size() > 0 && str[0] == '\\') str.remove (0);
#endif
}
#endif
// Yudit uses external library because of export restrictions.
#define SSEDY_CYPHER "TDES-168-bit"
SString
SSedy::getLocation ()
{
#if SEDY_BUILT_IN
return SString ("built-in");
#else
if (dynHandle) {
if (functions.sedy_create
&& functions.sedy_destroy
&& functions.sedy_encrypt
&& functions.sedy_decrypt
&& functions.sedy_get_result
&& functions.sedy_get_result_size
&& functions.sedy_get_cypher) {
return SString(location);
}
}
return SString("");
#endif
}
SString
SSedy::loadLibrary (const SStringVector& path)
{
#if SEDY_BUILT_IN
dynHandle = 0;
functions.sedy_create = (*sedy_create);
functions.sedy_destroy = (*sedy_destroy);
functions.sedy_encrypt = (*sedy_encrypt);
functions.sedy_decrypt = (*sedy_decrypt);
functions.sedy_get_result = (*sedy_get_result);
functions.sedy_get_result_size = (*sedy_get_result_size);
functions.sedy_get_cypher = (*sedy_get_cypher);
return SString ("built-in");
#else
if (dynHandle) {
if (functions.sedy_create
&& functions.sedy_destroy
&& functions.sedy_encrypt
&& functions.sedy_decrypt
&& functions.sedy_get_result
&& functions.sedy_get_result_size
&& functions.sedy_get_cypher) {
return SString(location);
}
return SString("");
}
SString libFile;
#ifdef USE_WINAPI
libFile = "libsedy.dll";
#else
#ifdef __APPLE__
libFile = "libsedy.dylib";
#else
libFile = "libsedy.so";
#endif
#endif
SString ret = libFile;
SFile flib (libFile, path);
if (flib.size() > 0)
{
libFile = flib.getName();
fixFileName (libFile);
}
location = libFile;
libFile.append ((char)0);
#ifdef USE_WINAPI
SEncoder u8("utf-8");
SEncoder u16("utf-16-le");
SString res = u16.encode (u8.decode (libFile));
WCHAR* filenameW = (WCHAR *) res.array();
dynHandle = LoadLibraryW (filenameW);
if (!dynHandle)
{
dynHandle = LoadLibraryA (libFile.array());
if (!dynHandle) return SString("");
}
#else
dynHandle = dlopen (libFile.array(), RTLD_LAZY);
if (!dynHandle)
{
return SString("");
}
#endif
#ifdef USE_WINAPI
functions.sedy_create = (void* (*)(char*, char*)) GetProcAddress((HMODULE)dynHandle, "sedy_create");
functions.sedy_destroy = (void (*)(void*)) GetProcAddress((HMODULE)dynHandle, "sedy_destroy");
functions.sedy_encrypt = (int (*)(void*, char*, unsigned long)) GetProcAddress((HMODULE)dynHandle, "sedy_encrypt");
functions.sedy_decrypt = (int (*)(void*, char*, unsigned long)) GetProcAddress((HMODULE)dynHandle, "sedy_decrypt");
functions.sedy_get_result = (char* (*)(void*)) GetProcAddress((HMODULE)dynHandle, "sedy_get_result");
functions.sedy_get_result_size = (unsigned long (*)(void*)) GetProcAddress((HMODULE)dynHandle, "sedy_get_result_size");
functions.sedy_get_cypher = (char* (*)(void*)) GetProcAddress((HMODULE)dynHandle, "sedy_get_cypher");
#else
functions.sedy_create = (void* (*)(char*, char*)) dlsym(dynHandle, "sedy_create");
functions.sedy_destroy = (void (*)(void*)) dlsym(dynHandle, "sedy_destroy");
functions.sedy_encrypt = (int (*)(void*, char*, unsigned long)) dlsym(dynHandle, "sedy_encrypt");
functions.sedy_decrypt = (int (*)(void*, char*, unsigned long)) dlsym(dynHandle, "sedy_decrypt");
functions.sedy_get_result = (char* (*)(void*)) dlsym(dynHandle, "sedy_get_result");
functions.sedy_get_result_size = (unsigned long (*)(void*)) dlsym(dynHandle, "sedy_get_result_size");
functions.sedy_get_cypher = (char* (*)(void*)) dlsym(dynHandle, "sedy_get_cypher");
#endif
if (functions.sedy_create
&& functions.sedy_destroy
&& functions.sedy_encrypt
&& functions.sedy_decrypt
&& functions.sedy_get_result
&& functions.sedy_get_result_size
&& functions.sedy_get_cypher)
{
return (SString(location));
}
if (!functions.sedy_create) {
fprintf (stderr, "sedy_create missing\n");
}
if (!functions.sedy_destroy) {
fprintf (stderr, "sedy_destroy missing\n");
}
if (!functions.sedy_encrypt) {
fprintf (stderr, "sedy_encrypt missing\n");
}
if (!functions.sedy_decrypt) {
fprintf (stderr, "sedy_decrypt missing\n");
}
if (!functions.sedy_get_result) {
fprintf (stderr, "sedy_get_result missing\n");
}
if (!functions.sedy_get_result_size) {
fprintf (stderr, "sedy_get_result_size missing\n");
}
if (!functions.sedy_get_cypher) {
fprintf (stderr, "sedy_get_cypher missing\n");
}
return (SString(""));
#endif
}
SSedy::SSedy ()
{
prepareLastError();
}
SSedy::~SSedy ()
{
}
void
SSedy::prepareLastError ()
{
lastError = SString("");
if (functions.sedy_create==0)
{
lastError = "No handle for sedy_create";
}
if (functions.sedy_destroy==0)
{
lastError = "No handle for sedy_destroy";
}
if (functions.sedy_encrypt==0)
{
lastError = "No handle for sedy_encrypt";
}
if (functions.sedy_encrypt==0)
{
lastError = "No handle for sedy_decrypt";
}
if (functions.sedy_get_result==0)
{
lastError = "No handle for sedy_get_result";
}
if (functions.sedy_get_result_size==0)
{
lastError = "No handle for sedy_get_result_size";
}
if (functions.sedy_get_cypher==0)
{
lastError = "No handle for sedy_get_cypher";
}
#if SEDY_BUILT_IN
lastError = SString("");
#else
if (!dynHandle)
{
lastError = "Could not load sedy dynamic library";
}
#endif
}
SString
SSedy::decrypt (const SString& text, const SString& passWord)
{
prepareLastError();
if (lastError.size())
{
return SString("");
}
SString arg = text;
SString pw = passWord;
pw.append ((char)0);
void* sedy = functions.sedy_create((char*)pw.array(), (char*)SSEDY_CYPHER);
int ret = (*functions.sedy_decrypt)(sedy, (char*)arg.array(), arg.size());
switch (ret) {
case SEDY_NO_ERROR:
break; // NO_ERROR
case SEDY_UNSOPPORTED_CYPHER:
lastError = SString("UNSOPPORTED_CYPHER");
functions.sedy_destroy(sedy);
return SString();
case SEDY_BAD_PASSWORD:
lastError = SString("BAD_PASSWORD");
functions.sedy_destroy(sedy);
return SString();
case SEDY_OUT_OF_MEMORY:
lastError = SString("OUT_OF_MEMORY");
functions.sedy_destroy(sedy);
return SString();
default:
lastError = SString("UNKOWN_ERROR");
functions.sedy_destroy(sedy);
return SString();
}
lastError = SString("");
SString cypher = SString (functions.sedy_get_cypher(sedy));
if (cypher != SString((char*)SSEDY_CYPHER)) {
lastError = SString("Cypher Changed to: ");
lastError.append (cypher);
functions.sedy_destroy(sedy);
return SString();
}
SString nonfree = SString(functions.sedy_get_result(sedy), functions.sedy_get_result_size(sedy));
functions.sedy_destroy (sedy);
return SString(nonfree);
}
SString
SSedy::encrypt (const SString& text, const SString& passWord)
{
prepareLastError();
if (lastError.size())
{
return SString("");
}
SString arg = text;
SString pw = passWord;
pw.append ((char)0);
void* sedy = functions.sedy_create((char*)pw.array(), (char*)SSEDY_CYPHER);
int ret = (*functions.sedy_encrypt)(sedy, (char*)arg.array(), arg.size());
switch (ret) {
case SEDY_NO_ERROR:
break; // NO_ERROR
case SEDY_UNSOPPORTED_CYPHER:
lastError = SString("UNSOPPORTED_CYPHER");
functions.sedy_destroy(sedy);
return SString();
case SEDY_BAD_PASSWORD:
lastError = SString("BAD_PASSWORD");
functions.sedy_destroy(sedy);
return SString();
case SEDY_OUT_OF_MEMORY:
lastError = SString("OUT_OF_MEMORY");
functions.sedy_destroy(sedy);
return SString();
default:
lastError = SString("UNKOWN_ERROR");
functions.sedy_destroy(sedy);
return SString();
}
lastError = SString("");
SString cypher = SString (functions.sedy_get_cypher(sedy));
if (cypher != SString(SSEDY_CYPHER)) {
lastError = SString("Cypher Changed to: ");
lastError.append (cypher);
functions.sedy_destroy(sedy);
return SString();
}
SString nonfree = SString(functions.sedy_get_result(sedy), functions.sedy_get_result_size(sedy));
functions.sedy_destroy (sedy);
return SString(nonfree);
}
SString
SSedy::getLastError ()
{
return SString(lastError);
}
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