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By request, updated executable version 2.1 for Windows.

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Source code for 2.1 for Windows.

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Copyright (C) 2001 Neil Edelman
Obfuscator is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 Obfuscator (see gnu.txt.) If not, see
<http://www.gnu.org/licenses/>.

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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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/* Copyright 2001 Neil Edelman, distributed under the terms of the
GNU General Public License, see copying.txt */
#include <windows.h>
#include "res.h"
#include "main.h"
int PASCAL WinMain(HINSTANCE hinst, HINSTANCE hinstPrev, LPSTR lpCmdLine, int nCmdShow) {
HANDLE hHeap;
int nErrorLevel;
/* get a private heap for memory */
if(!(hHeap = HeapCreate(0, 0, 0))) {
MessageBox(NULL, "Windows, for unknown reasons, isn't letting the program initialize its memory heap.", "Oh, This is Just Great", MB_OK | MB_ICONERROR);
return 2;
}
/* send required info to the dialog */
{
void *lpInfo[2];
/* fill in the info */
lpInfo[0] = hinst;
lpInfo[1] = lpCmdLine;
/* open the dialog box and save its return-value */
nErrorLevel = DialogBoxParam(hinst, MAKEINTRESOURCE(IDD_MAINDIALOG), NULL, (DLGPROC)DialogFunc, (LPARAM)lpInfo);
}
/* kill that heap */
if(!HeapDestroy(hHeap)) {
MessageBox(NULL, "It's most unusual, but Windows isn't letting the program destroy its memory heap.", "This is NOT Normal", MB_OK | MB_ICONWARNING);
return 1;
}
/* end the program */
return nErrorLevel;
}
static int FAR PASCAL DialogFunc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam) {
static HINSTANCE hinst = NULL;
static BOOL bReady = FALSE, bClobberExisting = FALSE;
switch (msg) {
/* FIXME: how do I accept drag-and-drop files? */
case WM_INITDIALOG:
/* FIXME: how do I set a dialog box icon? */
/* set some limits to the input field lengths */
SendDlgItemMessage(hwndDlg, ID_INPUTFILENAME, EM_LIMITTEXT, MAX_PATH - 1, 0);
SendDlgItemMessage(hwndDlg, ID_INPUTPASSWORD, EM_LIMITTEXT, SHRT_MAX - 1, 0);
SendDlgItemMessage(hwndDlg, ID_OUTPUTFILENAME, EM_LIMITTEXT, MAX_PATH - 1, 0);
/* these two buttons start off disabled */
EnableWindow(GetDlgItem(hwndDlg, ID_ENCRYPT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_DECRYPT), FALSE);
/* use any command-line arguments */
{
char *lpCmdLine;
/* fill in the info */
hinst = ((void **)lParam)[0];
lpCmdLine = ((void **)lParam)[1];
/* if there were arguments */
if(lpCmdLine && *lpCmdLine) {
BOOL bEncrypt = FALSE, bDecrypt = FALSE, bUseNull = FALSE, bTerminate = FALSE, bHelp = FALSE;
char *lpcArg = lpCmdLine, *szInFile = NULL, *szOutFile = NULL, *szPword = NULL;
/* skip initial whitespce */
while(*lpcArg == ' ' || *lpcArg == *"\t") lpcArg++;
/* while there is a switch */
while(*lpcArg == '/' || *lpcArg == '-') {
/* skip past all switch characters */
while(*lpcArg == '/' || *lpcArg == '-') lpcArg++;
/* if the switch actually exists and is one letter long */
if(*lpcArg && (lpcArg[1] == ' ' || lpcArg[1] == *"\t" || !lpcArg[1])) {
if(*lpcArg == 'e') bEncrypt = TRUE;
else if(*lpcArg == 'd') bDecrypt = TRUE;
else if(*lpcArg == 'n') bUseNull = TRUE;
else if(*lpcArg == 't') bTerminate = TRUE;
else if(*lpcArg == 'o') bClobberExisting = TRUE;
else if(*lpcArg == '?' || *lpcArg == 'h') bHelp = TRUE;
}
/* skip past the switch */
while(*lpcArg && *lpcArg != ' ' && *lpcArg != *"\t") lpcArg++;
/* skip to the next arg */
while(*lpcArg == ' ' || *lpcArg == *"\t") lpcArg++;
}
/* get the first argument (input file path) */
szInFile = lpcArg;
/* skip to the end of the arg */
while(*lpcArg && *lpcArg != ' ' && *lpcArg != *"\t") lpcArg++;
/* if there's more */
if(*lpcArg) {
/* terminate the string here */
*lpcArg = 0;
/* move on */
lpcArg++;
/* skip whitespce */
while(*lpcArg == ' ' || *lpcArg == *"\t") lpcArg++;
/* the next argument is the output file path */
szOutFile = lpcArg;
/* skip to the end of the arg */
while(*lpcArg && *lpcArg != ' ' && *lpcArg != *"\t") lpcArg++;
/* test for further arguments */
if(*lpcArg) {
/* terminate the string here */
*lpcArg = 0;
/* move on */
lpcArg++;
/* the next arg is the password */
szPword = lpcArg;
}
}
/* initialize the fields with the command string */
{
signed short sFieldShift = 0;
if(szInFile && *szInFile) {
/* set the input field */
SetDlgItemText(hwndDlg, ID_INPUTFILENAME, szInFile);
/* move to the password field */
sFieldShift = 1;
}
if(szOutFile && *szOutFile) {
/* set the output field */
SetDlgItemText(hwndDlg, ID_OUTPUTFILENAME, szOutFile);
/* move to the password field */
sFieldShift = 1;
}
if(szPword && *szPword) {
/* set the password field */
SetDlgItemText(hwndDlg, ID_INPUTPASSWORD, szPword);
/* move to the use null checkbox */
sFieldShift = 2;
}
/* move the specified number of fields ahead */
while(sFieldShift > 0) {
/* set the focus to the next field */
PostMessage(hwndDlg, WM_NEXTDLGCTL, 0, FALSE); /* can't figure out how to get it to go to a specific control . . . documentation is FUBAR on this */
/* decrement counter */
sFieldShift--;
}
}
if(bHelp) SendMessage(hwndDlg, WM_COMMAND, ID_ABOUT, 0); /* the actual message is not checked in this program */
/* check for the null flag */
if(bUseNull) CheckDlgButton(hwndDlg, ID_USENULL, TRUE);
/* check decrypt flag */
if(bDecrypt && !bEncrypt) SendMessage(hwndDlg, WM_COMMAND, ID_DECRYPT, 0); /* the actual message is not checked in this program */
/* check encrypt flag */
else if(bEncrypt && !bDecrypt) SendMessage(hwndDlg, WM_COMMAND, ID_ENCRYPT, 0); /* the actual message is not checked in this program */
/* check terminate flag */
if(bTerminate) EndDialog(hwndDlg, 0);
}
}
/* we did something */
return TRUE;
case WM_COMMAND:
switch (LOWORD(wParam) /* WIN32 CTLID */) {
case ID_INPUTFILENAME:
if(HIWORD(wParam) /* WIN32 CTLMSG */ == EN_UPDATE) {
int nInFileLen, end = 0, i;
char *szInFile;
/* find the text length */
nInFileLen = SendDlgItemMessage(hwndDlg, ID_INPUTFILENAME, WM_GETTEXTLENGTH, 0, 0);
if(nInFileLen) {
/* try getting the space for the text data, plus the maximum 4 extra for an added extension */
if((szInFile = Alloc(hwndDlg, nInFileLen + 5))) {
/* get the text data */
GetDlgItemText(hwndDlg, ID_INPUTFILENAME, szInFile, nInFileLen + 1);
/* erase the extension and add a default extension */
for(i = 0; i < nInFileLen && szInFile[i]; i++) {
if(szInFile[i] == '.') end = i;
}
if(end == 0) end = i;
if(szInFile[end] == '.' && szInFile[end + 1] == '_') {
szInFile[++end] = 'f';
szInFile[++end] = 'o';
szInFile[++end] = 'o';
szInFile[++end] = 0;
}
else {
szInFile[end++] = '.';
szInFile[end++] = '_';
szInFile[end] = 0;
}
/* set this as the output file name */
SetDlgItemText(hwndDlg, ID_OUTPUTFILENAME, szInFile);
/* free the text */
Free(hwndDlg, &szInFile);
}
}
else {
/* empty output file name */
SetDlgItemText(hwndDlg, ID_OUTPUTFILENAME, "");
}
}
/* continue with the rest of the checks */
case ID_INPUTPASSWORD:
case ID_OUTPUTFILENAME:
if(HIWORD(wParam) /* WIN32 CTLMSG */ == EN_UPDATE) {
/* if all of the fields are full */
if( SendDlgItemMessage(hwndDlg, ID_INPUTFILENAME, WM_GETTEXTLENGTH, 0, 0) &&
SendDlgItemMessage(hwndDlg, ID_INPUTPASSWORD, WM_GETTEXTLENGTH, 0, 0) &&
SendDlgItemMessage(hwndDlg, ID_OUTPUTFILENAME, WM_GETTEXTLENGTH, 0, 0)) {
/* if this is newly ready */
if(!bReady) {
/* enable the buttons */
EnableWindow(GetDlgItem(hwndDlg, ID_ENCRYPT), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_DECRYPT), TRUE);
/* we're ready */
SetDlgItemText(hwndDlg, IDT_STATUS, "ready");
/* now ready */
bReady = TRUE;
}
}
else {
/* not ready anymore */
if(bReady) {
/* disable buttons */
EnableWindow(GetDlgItem(hwndDlg, ID_ENCRYPT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_DECRYPT), FALSE);
/* not ready */
SetDlgItemText(hwndDlg, IDT_STATUS, "need input");
/* not ready */
bReady = FALSE;
}
}
}
/* we did something */
return TRUE;
case ID_ENCRYPT:
case ID_DECRYPT:
{
HANDLE hFSource = INVALID_HANDLE_VALUE, hFTarget = INVALID_HANDLE_VALUE; /* in case of error */
int nInFileLen, nPwordLen, nOutFileLen, nExtraNull;
char *szInFile = NULL, *szPword = NULL, *szOutFile = NULL; /* NULL so they can be checked in case of memory error */
/* get the lengths of each field ( +1 b/c the \0 on the end) */
nInFileLen = SendDlgItemMessage(hwndDlg, ID_INPUTFILENAME, WM_GETTEXTLENGTH, 0, 0);
nPwordLen = SendDlgItemMessage(hwndDlg, ID_INPUTPASSWORD, WM_GETTEXTLENGTH, 0, 0);
nOutFileLen = SendDlgItemMessage(hwndDlg, ID_OUTPUTFILENAME, WM_GETTEXTLENGTH, 0, 0);
/* allocate space for the text */
if(!(szInFile = Alloc(hwndDlg, nInFileLen + 1)) || !(szPword = Alloc(hwndDlg, nPwordLen + 1)) || !(szOutFile = Alloc(hwndDlg, nOutFileLen + 1))) {
Free(hwndDlg, &szInFile);
Free(hwndDlg, &szPword);
Free(hwndDlg, &szOutFile);
}
/* get the text from the dialog items */
GetDlgItemText(hwndDlg, ID_INPUTFILENAME, szInFile, nInFileLen + 1);
GetDlgItemText(hwndDlg, ID_INPUTPASSWORD, szPword, nPwordLen + 1);
GetDlgItemText(hwndDlg, ID_OUTPUTFILENAME, szOutFile, nOutFileLen + 1);
/* check that the length of the password is within limits */
if(nPwordLen < 1) {
/* free the name data */
Free(hwndDlg, &szInFile);
Free(hwndDlg, &szPword);
Free(hwndDlg, &szOutFile);
/*report the error */
MessageBox(hwndDlg, "Password character sequence must exist.", "Can't Work With This", MB_OK | MB_ICONASTERISK);
SetDlgItemText(hwndDlg, IDT_STATUS, "missing data");
return TRUE;
}
if(nPwordLen > BIG_PASSWORD_LENGTH && MessageBox(hwndDlg, "That password looks very long; are you sure that that's what you want?", "This isn't a Dissertation", MB_YESNO | MB_ICONQUESTION) == IDNO) {
/* free the name data */
Free(hwndDlg, &szInFile);
Free(hwndDlg, &szPword);
Free(hwndDlg, &szOutFile);
/*report the "error" */
SetDlgItemText(hwndDlg, IDT_STATUS, "operation aborted");
return TRUE;
}
/* attempt to load the specified stuff */
if(!LoadFiles(hwndDlg, szInFile, &hFSource, szOutFile, &hFTarget, bClobberExisting)) {
/* close any open files */
CloseFiles(hwndDlg, &hFSource, &hFTarget);
/* free the name data */
Free(hwndDlg, &szInFile);
Free(hwndDlg, &szPword);
Free(hwndDlg, &szOutFile);
/* the message was handled */
return TRUE;
}
/* see if the null is to be included */
if(IsDlgButtonChecked(hwndDlg, ID_USENULL)) nExtraNull = 1;
else nExtraNull = 0;
/* disable input */
EnableWindow(GetDlgItem(hwndDlg, ID_INPUTFILENAME), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_INPUTPASSWORD), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_OUTPUTFILENAME), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_ENCRYPT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_DECRYPT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_ABOUT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, IDCANCEL), FALSE);
/* find out if this is an attempt at encrypting or decrypting */
if(LOWORD(wParam) == ID_ENCRYPT) {
/* send this info to the encryption function */
Encrypt(hwndDlg, hFSource, szPword, nPwordLen + nExtraNull, hFTarget);
}
else {
/* send this info to the decryption function */
Decrypt(hwndDlg, hFSource, szPword, nPwordLen + nExtraNull, hFTarget);
}
/* free the name data */
Free(hwndDlg, &szInFile);
Free(hwndDlg, &szPword);
Free(hwndDlg, &szOutFile);
/* close the opened files */
CloseFiles(hwndDlg, &hFSource, &hFTarget);
/* re-enable input as appropriate */
EnableWindow(GetDlgItem(hwndDlg, ID_INPUTFILENAME), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_INPUTPASSWORD), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_OUTPUTFILENAME), TRUE);
if(bReady) {
EnableWindow(GetDlgItem(hwndDlg, ID_ENCRYPT), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_DECRYPT), TRUE);
}
EnableWindow(GetDlgItem(hwndDlg, ID_ABOUT), TRUE);
EnableWindow(GetDlgItem(hwndDlg, IDCANCEL), TRUE);
/* the input focus usually just disappears from everything here (for no reason?), so get it back */
SendMessage(hwndDlg, WM_SETFOCUS, 0, 0);
}
/* we did something */
return TRUE;
case ID_ABOUT:
/* show the dialog */
DialogBox(hinst, MAKEINTRESOURCE(IDD_ABOUTDIALOG), hwndDlg, AboutDialogFunc);
/* we did something */
return TRUE;
case IDOK:
{
int nInFileLen, end = 0, i;
char *szInFile;
/* find the text length of the input file name */
nInFileLen = SendDlgItemMessage(hwndDlg, ID_INPUTFILENAME, WM_GETTEXTLENGTH, 0, 0);
/* if there is text in this field, as well as the other required fields */
if(nInFileLen && SendDlgItemMessage(hwndDlg, ID_INPUTPASSWORD, WM_GETTEXTLENGTH, 0, 0) && SendDlgItemMessage(hwndDlg, ID_OUTPUTFILENAME, WM_GETTEXTLENGTH, 0, 0)) {
/* try getting the space for the text data */
if((szInFile = Alloc(hwndDlg, nInFileLen + 1))) {
/* get the text data */
GetDlgItemText(hwndDlg, ID_INPUTFILENAME, szInFile, nInFileLen + 1);
/* find the end of the path */
for(i = 0; i < nInFileLen && szInFile[i]; i++) {
if(szInFile[i] == '.') end = i;
}
if(end == 0) end = i;
/* if the file has the default encrypted extension */
if(szInFile[end] == '.' && szInFile[end + 1] == '_') {
/* see if the user wants to decrypt the file */
if(MessageBox(hwndDlg, "DECRYPT the input file; is this correct?", "Uncertain", MB_YESNO | MB_ICONQUESTION) == IDYES) {
/* try it */
SendMessage(hwndDlg, WM_COMMAND, ID_DECRYPT, 0); /* the actual message is not checked in this program */
}
}
else {
/* see if the user wants to encrypt the file */
if(MessageBox(hwndDlg, "ENCRYPT the input file; is this correct?", "Uncertain", MB_YESNO | MB_ICONQUESTION) == IDYES) {
/* try it */
SendMessage(hwndDlg, WM_COMMAND, ID_ENCRYPT, 0); /* the actual message is not checked in this program */
}
}
/* free the text */
Free(hwndDlg, &szInFile);
}
}
}
/* the message was handled */
return TRUE;
case IDCANCEL:
/* quit */
EndDialog(hwndDlg, 0);
/* we did something */
return TRUE;
}
/* just in case we get some wierded message */
break;
case WM_CLOSE:
/* quit */
EndDialog(hwndDlg, 0);
/* we did something */
return TRUE;
}
/* we did nothing */
return FALSE;
}
static int FAR PASCAL AboutDialogFunc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam) {
switch (msg) {
case WM_COMMAND:
switch (LOWORD(wParam) /* WIN32 CTLID */) {
case ID_HELP:
MessageBox(hwndDlg, "This is an encryption programme.\n\n\
The \"append terminating null\" option adds a null character to the end of \
your password; the previous version of this program always did this. Because \
the null is part of the password, this toggle must be set to the same state \
when decrypting as it was when encrypting.", "Help", MB_OK);
return TRUE;
case ID_LEGAL:
MessageBox(hwndDlg, "Copyright (C) 2001 Neil Edelman, distributed \
under the terms of the GNU General Public License.\n\n\
Version 2.0.\n\n\
Obfuscator is free software: you can redistribute it and/or modify \
it under the terms of the GNU General Public License as published by \
the Free Software Foundation, either version 3 of the License, or \
(at your option) any later version.\n\n\
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, \
<http://www.gnu.org/licenses/>.", "Copyright", MB_OK);
return TRUE;
case ID_INFO:
MessageBox(hwndDlg, "The encryption process uses an stream \
cipher algorithm. The length of the password is linearly related to how many \
bits of encryption. The bits of the key generate a pseudorandom keysteam. It \
is possible that this is insecure.", "Encryption", MB_OK);
return TRUE;
case ID_SYNTAX:
MessageBox(hwndDlg, "Usage:\nObfuscator-2_1.exe [<options>] [<input> [<output> [<password>]]]\n\n\
Where:\n<options> - any combination of:\n\t-e (start encryption immediately);\n\t-d (start decryption immediately, negates -e);\n\t-n (add null character to password);\n\t-t \
(terminate immediately);\n\t-o (overwrite existing files without warning); and\n\t-? or -h (show info dialog).\n<output> - the output file path; and\n<password> - the encryption \
character sequence.\n\n\
The password starts exactly one space after <output> and continues to the end, to facilitate leading or trailing spaces. Real paths must be used (i.e. no spaces).\n\n\
e.g.:\nObfuscator-2_1 -e -t -o c:\\mydocu~1\\myfile.txt c:\\mydocu~1\\myfile._ bar\n\n\
Try [HKEY_CLASSES_ROOT\\Unknown\\shell\\obfuscate\\command]@=\"Obfuscator-2_1.exe %1\". \
Dragging a file onto the program icon will also work.", "Syntax", MB_OK);
return TRUE;
case ID_AUTHOR:
MessageBox(hwndDlg, "This program was written by Neil Edelman, <http://neil.chaosnet.org/>.", "Author", MB_OK);
return TRUE;
/* FIXME: make the last button selected */
case IDOK:
case IDCANCEL:
EndDialog(hwndDlg, 0);
return TRUE;
}
}
return FALSE;
}
/* FIXME: put a progress bar in a separate windows to eliminate the problem of unresponsiveness during work */
void Encrypt(HWND hwndDlg, HANDLE hFSource, char *szPword, int nPwordLen, HANDLE hFTarget) {
DWORD nNumberOfBytes = 1;
int nPwordPos = 0, nKiloBytesRemaining, i;
char szStatus[256];
byte prevDataParity = 0, key, data, addr, garb, valueTable[256], addressTable[256];
/* check the parameters sent to the function */
if(!hFSource || !szPword || !nPwordLen || !hFTarget) {
MessageBox(hwndDlg, "Program Error: some input data didn't make it to the process.", "Oh Dear", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "program error");
return;
}
/* make a table of translation values */
{
int shiftVal = 0;
/* determine how far the initial values in the table should be shifted */
for(i = 0; i < nPwordLen; i++) {
shiftVal ^= szPword[i] << (i & 7);
}
shiftVal -= nPwordLen; /* if the password is "xxxxx" this makes it more powerful than it otherwise would be (decypting with "xxx" might otherwise yield a less-strongly encrypted file_ */
/* write out the table which determines the values to which each data value is mapped and a table for their addresses */
for(i = 0; i < 256; i++) {
valueTable[i] = (byte)(i + shiftVal);
addressTable[i] = (byte)(i - shiftVal); /* shifting values one way shifts the address of the values the other way */
}
}
/* find out how big the file is */
nKiloBytesRemaining = (GetFileSize(hFSource, NULL) >> 10) + 1; /* round up to make the program seem faster :P */
/* go through and mess with the file */
while(nNumberOfBytes) {
wsprintf(szStatus, "kilobytes remaining: %d", nKiloBytesRemaining);
SetDlgItemText(hwndDlg, IDT_STATUS, szStatus);
nKiloBytesRemaining--;
/* go through the next kilobyte */
for(i = 0; i < 1024; i++) {
/* get a byte of input */
if(!ReadFile(hFSource, &data, sizeof(byte), &nNumberOfBytes, NULL)) {
MessageBox(hwndDlg, "The input file spewed forth vile garbage! Output is unreliable.", "The End is Here", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
/* make sure that something was read (i.e. not @ EOF) */
if(!nNumberOfBytes) break;
/* make sure that the correct amount was read */
if(nNumberOfBytes != sizeof(byte)) {
MessageBox(NULL, "A peculiar file I/O error has resulted in the wrong amount of data being read. Output is unreliable.", "Ohno", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
/* get the address in the valuetable of the data to write */
addr = addressTable[data];
/* create an encryption seed based on the possword and file position */
{
int nGlyphsUsed;
char *lpChar;
key = 0;
lpChar = szPword + nPwordPos; /* address of the current character in the password */
for(nGlyphsUsed = 0; nGlyphsUsed < nPwordLen; nGlyphsUsed++) {
if(!*lpChar) lpChar = szPword; /* if at the end of the sequence, loop back to the start */
key ^= (*lpChar) << (nGlyphsUsed & 7); /* use the shifting because normal passwords only contain alphanumeric values, so it is now possible to have any byte value */
}
key += ((byte)i ^ (byte)(i >> (szPword[nPwordLen - 1 - nPwordPos] & 7))); /* so that the key changes for the same glyph in the password across the file */
}
/* encrypt the data to find where to look in the table */
garb = addr ^ key;
/* use two parts of the password, and modify the operation based on previous data */
if(prevDataParity) garb += szPword[nPwordLen - 1 - nPwordPos];
else garb -= szPword[nPwordLen - 1 - nPwordPos];
/* set the parity for next time */
prevDataParity = data & 1;
/* now swap this result with the value of the original data in the translation table (can't use XOR b/c they're references, so must do it the slow way) */
{
byte dataValue = valueTable[data];
valueTable[data] = valueTable[garb];
valueTable[garb] = dataValue;
}
/* and swap the addresses which point to these values */
{
byte dataValueAddress = addressTable[valueTable[data]];
addressTable[valueTable[data]] = addressTable[valueTable[garb]];
addressTable[valueTable[garb]] = dataValueAddress;
}
/* dynamically modify the password sequence */
szPword[nPwordPos] += valueTable[addr];
/* move to the next character in the sequence */
nPwordPos = (nPwordPos + 1) % nPwordLen;
/* write to the output file */
if(!WriteFile(hFTarget, &garb, sizeof(byte), &nNumberOfBytes, NULL)) {
MessageBox(hwndDlg, "A write error caused the output file to be twisted into uselessly unintelligable mush!", "Oh, Great", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
if(nNumberOfBytes != sizeof(byte)) {
MessageBox(hwndDlg, "The output file has been bollixed by some eldritch file I/O singulatity.", "This is Peculiar", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
}
}
/* set the focus to "done" */
PostMessage(hwndDlg, WM_NEXTDLGCTL, 1, FALSE); /* 1 sets it there . . . nothing else seems to work (specifically, IDCANCEL does squat) - I'll never understand Windoze */
/* admit what has been done */
SetDlgItemText(hwndDlg, IDT_STATUS, "encryption appears successful");
}
void Decrypt(HWND hwndDlg, HANDLE hFSource, char *szPword, int nPwordLen, HANDLE hFTarget) {
DWORD nNumberOfBytes = 1;
int nPwordPos = 0, nKiloBytesRemaining, i;
char szStatus[256];
byte prevDataParity = 0, key, data, addr, garb, valueTable[256];
/* check the parameters sent to the function */
if(!hFSource || !szPword || !nPwordLen || !hFTarget) {
MessageBox(hwndDlg, "Program Error: some input data didn't make it to the process.", "Oh Dear", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "program error");
return;
}
/* make a table of translation values */
{
int shiftVal = 0;
/* determine how far the initial values in the table should be shifted */
for(i = 0; i < nPwordLen; i++) {
shiftVal ^= szPword[i] << (i & 7);
}
shiftVal -= nPwordLen; /* if the password is "xxxxx" this makes it more powerful than it otherwise would be (decypting with "xxx" might otherwise yield a less-strongly encrypted file_ */
/* write out the table which determines the values to which each data value is mapped */
for(i = 0; i < 256; i++) {
valueTable[i] = (byte)(i + shiftVal);
}
}
/* find out how big the file is */
nKiloBytesRemaining = GetFileSize(hFSource, NULL) >> 10;
/* go through and mess with the file */
while(nNumberOfBytes) {
wsprintf(szStatus, "kilobytes remaining: %d", nKiloBytesRemaining);
SetDlgItemText(hwndDlg, IDT_STATUS, szStatus);
nKiloBytesRemaining--;
/* go through the next kilobyte */
for(i = 0; i < 1024; i++) {
/* get a byte of input */
if(!ReadFile(hFSource, &garb, sizeof(byte), &nNumberOfBytes, NULL)) {
MessageBox(hwndDlg, "The input file spewed forth vile garbage! Output is unreliable.", "The End is Here", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
/* make sure that something was read (i.e. not @ EOF) */
if(!nNumberOfBytes) break;
/* make sure that the correct amount was read */
if(nNumberOfBytes != sizeof(byte)) {
MessageBox(NULL, "A peculiar file I/O error has resulted in the wrong amount of data being read. Output is unreliable.", "It's FUBAR", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
/* create an encryption seed based on the possword and file position */
{
int nGlyphsUsed;
char *lpChar;
key = 0;
lpChar = szPword + nPwordPos; /* address of the current character in the password */
for(nGlyphsUsed = 0; nGlyphsUsed < nPwordLen; nGlyphsUsed++) {
if(!*lpChar) lpChar = szPword; /* if at the end of the sequence, loop back to the start */
key ^= (*lpChar) << (nGlyphsUsed & 7); /* use the shifting because normal passwords only contain alphanumeric values, so it is now possible to have any byte value */
}
key += ((byte)i ^ (byte)(i >> (szPword[nPwordLen - 1 - nPwordPos] & 7))); /* so that the key changes for the same glyph in the password across the file */
}
/* reverse this part of the obfuscaption */
if(prevDataParity) addr = garb - szPword[nPwordLen - 1 - nPwordPos];
else addr = garb + szPword[nPwordLen - 1 - nPwordPos];
/* decrypt the garbage in addr to find where to look in the table */
addr ^= key;
/* get the output data from this point in the table */
data = valueTable[addr];
/* set the parity for next time */
prevDataParity = data & 1;
/* now swap this result with the value of the original data in the translation table */
{
byte dataValue = valueTable[data];
valueTable[data] = valueTable[garb];
valueTable[garb] = dataValue;
}
/* dynamically modify the password sequence */
szPword[nPwordPos] += valueTable[addr];
/* move to the next character in the sequence */
nPwordPos = (nPwordPos + 1) % nPwordLen;
/* write to the output file */
if(!WriteFile(hFTarget, &data, sizeof(byte), &nNumberOfBytes, NULL)) {
MessageBox(hwndDlg, "A write error caused the output file to be twisted into uselessly unintelligable mush!", "Oh, Great", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
if(nNumberOfBytes != sizeof(byte)) {
MessageBox(hwndDlg, "The output file has been bollixed by some eldritch file I/O singulatity.", "This is Peculiar", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "file i/o error");
return;
}
}
}
/* set the focus to "done" */
PostMessage(hwndDlg, WM_NEXTDLGCTL, 1, FALSE); /* 1 sets it there . . . nothing else seems to work (specifically, IDCANCEL does squat) - I'll never understand Windoze */
/* admit what has been done */
SetDlgItemText(hwndDlg, IDT_STATUS, "decryption appears successful");
}
int LoadFiles(HWND hwndDlg, char *szInFile, HANDLE *hFSource, char *szOutFile, HANDLE *hFTarget, BOOL bClobberExisting) {
/* check the filenames sent to the function */
if(!szInFile || !szOutFile) {
MessageBox(hwndDlg, "Program error: the file name paths coudn't be found.", "It's All Over", MB_OK | MB_ICONWARNING);
SetDlgItemText(hwndDlg, IDT_STATUS, "program error");
return FALSE;
}
if(lstrlen(szInFile) < 1) {
MessageBox(hwndDlg, "Input file path has not beem specified.", "This Won't Do", MB_OK | MB_ICONASTERISK);
SetDlgItemText(hwndDlg, IDT_STATUS, "missing data");
return FALSE;
}
if(lstrlen(szInFile) > MAX_PATH) {
MessageBox(hwndDlg, "Input file path exceeds Windows' length capacity.", "Message of Unavoidable Death", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "data overload");
return FALSE;
}
if(lstrlen(szOutFile) < 1) {
MessageBox(hwndDlg, "There must be more to the output file path.", "Feed Me", MB_OK | MB_ICONASTERISK);
SetDlgItemText(hwndDlg, IDT_STATUS, "missing data");
return FALSE;
}
if(lstrlen(szOutFile) > MAX_PATH) {
MessageBox(hwndDlg, "Output file path exceeds Windows' length capacity.", "Message of Imminent Doom", MB_OK | MB_ICONERROR);
SetDlgItemText(hwndDlg, IDT_STATUS, "data overload");
return FALSE;
}
/* open the input file */
if((*hFSource = CreateFile(szInFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL)) == INVALID_HANDLE_VALUE) {
MessageBox(hwndDlg, "The input file refused to open. It may be currently unreadable, or it may not even exist.", "Bad", MB_OK | MB_ICONWARNING);
SetDlgItemText(hwndDlg, IDT_STATUS, "input file open failed");
return FALSE;
}
/* open using CREATE_ALWAYS if specified */
if(bClobberExisting) {
if((*hFTarget = CreateFile(szOutFile, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_FLAG_SEQUENTIAL_SCAN, NULL)) == INVALID_HANDLE_VALUE) {
MessageBox(hwndDlg, "Output file won't open. It may exist and be in use or read-only, or perhaps it is on a read-only drive, or the path could be invalid, or maybe something else is wrong.", "Holy Cow", MB_OK | MB_ICONWARNING);
SetDlgItemText(hwndDlg, IDT_STATUS, "output file open failed");
return FALSE;
}
}
/* otherwise open the output file with a overwrite warning */
else if((*hFTarget = CreateFile(szOutFile, GENERIC_WRITE, 0, NULL, CREATE_NEW, FILE_FLAG_SEQUENTIAL_SCAN, NULL)) == INVALID_HANDLE_VALUE) {
/* if it didn't work, try using CREATE_ALWAYS in case the file must be overwritten */
if(MessageBox(hwndDlg, "Output file is not available. Do you want to attempt to overwrite any existing files with that name?", "UhOh", MB_YESNO | MB_ICONQUESTION | MB_DEFBUTTON2) == IDYES) {
if((*hFTarget = CreateFile(szOutFile, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_FLAG_SEQUENTIAL_SCAN, NULL)) == INVALID_HANDLE_VALUE) {
MessageBox(hwndDlg, "The output file still won't open", "Holy Cow", MB_OK | MB_ICONWARNING);
SetDlgItemText(hwndDlg, IDT_STATUS, "output file open failed");
return FALSE;
}
}
/* the user didn't attempt to overwrite the file */
else {
SetDlgItemText(hwndDlg, IDT_STATUS, "output file open aborted");
return FALSE;
}
}
/* return sucess to the caller */
return TRUE;
}
void CloseFiles(HWND hwndDlg, HANDLE *hFSource, HANDLE *hFTarget) {
/* close the opened files */
if(*hFTarget != INVALID_HANDLE_VALUE) {
if(!CloseHandle(*hFTarget)) {
MessageBox(hwndDlg, "The output file won't close.", "Interesting . . . ", MB_OK | MB_ICONEXCLAMATION);
return;
}
*hFTarget = NULL;
}
if(*hFSource != INVALID_HANDLE_VALUE) {
if(!CloseHandle(*hFSource)) {
MessageBox(hwndDlg, "The input file won't close.", "Fascinating . . . ", MB_OK | MB_ICONEXCLAMATION);
return;
}
*hFSource = NULL;
}
}
void *Alloc(HWND hwndDlg, int size) {
HANDLE hHeap;
void *ptr;
/* allocate some space */
if(!(hHeap = GetProcessHeap()) || !(ptr = HeapAlloc(hHeap, 0, size))) {
MessageBox(hwndDlg, "Some kind of memory error has appeared.", "Vague Warning", MB_OK | MB_ICONERROR);
return NULL;
}
/* send back the allocated space */
return ptr;
}
void Free(HWND hwndDlg, void **ptr) {
HANDLE hHeap;
/* we need a pointer */
if(!*ptr) return;
/* free the data */
if(!(hHeap = GetProcessHeap()) || !HeapFree(hHeap, 0, *ptr)) {
MessageBox(hwndDlg, "An attempt at freeing memory failed.", "Not a Good Sign", MB_OK | MB_ICONERROR);
}
/* set the pointer to NULL */
*ptr = NULL;
}

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#define BIG_PASSWORD_LENGTH 128
typedef unsigned char byte;
int PASCAL WinMain(HINSTANCE hinst, HINSTANCE hinstPrev, LPSTR lpCmdLine, int nCmdShow);
static int FAR PASCAL DialogFunc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam);
static int FAR PASCAL AboutDialogFunc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam);
void Encrypt(HWND hwndDlg, HANDLE hFSource, char *szPword, int nPwordLen, HANDLE hFTarget);
void Decrypt(HWND hwndDlg, HANDLE hFSource, char *szPword, int nPwordLen, HANDLE hFTarget);
int LoadFiles(HWND hwndDlg, char *szInFile, HANDLE *hFSource, char *szOutFile, HANDLE *hFTarget, BOOL bClobberExisting);
void CloseFiles(HWND hwndDlg, HANDLE *hFSource, HANDLE *hFTarget);
void *Alloc(HWND hwndDlg, int size);
void Free(HWND hwndDlg, void **ptr);

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out := Obfuscator-2_1.exe
obj := main.o
res := res.res
#lib := #ws2_32.lib
# cc = gcc -c -fasm -pedantic -Wall -O3\
# -fomit-frame-pointer -ffast-math -funroll-loops\
# $*.c -o $*.o
# ld = gcc -s -lws2_32 -O3 -o $(out) $(obj) $(res) $(lib)
# rc = windres $*.rc -o $*.res
cc = lcc -A -O -Fo$*.o $*.c #-ansic -ansic90
ld = lcclnk -s -o $(out) $(obj) $(res) $(lib)
rc = lrc -Fo$*.res $*.rc
default : $(out)
#.PHONY : clean
#clean :
# $(foreach file, $(obj) $(out), -$(RM) $(file)$(br))
$(out) : $(obj) $(res)
$(ld)
main.o : main.c
$(cc)
res.res : res.rc
$(rc)
%.o : %.c
$(cc)
%.res : %.rc
$(rc)

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Obfuscator-2_1/readme.txt Normal file
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Copyright (C) 2001 Neil Edelman, see copying.txt.
neil dot edelman each mail dot mcgill dot ca
Version 2.1.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; see copying.txt.
The encryption process uses a stream cipher. The length of the
key is linearly related to how many bits of encryption. The bits of
the key generate a pseudorandom keysteam. It is possible that this
is insecure.

29
Obfuscator-2_1/res.h Normal file
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#define NOID -1
#define IDD_MAINDIALOG 128
#define IDD_ABOUTDIALOG 129
#define IDI_MAINICON 144
#define IDI_ICON0 145
#define IDI_ICON1 146
#define IDI_ICON2 147
#define IDI_ICON3 148
#define IDI_ICON4 149
#define IDI_ICON5 150
#define ID_INPUTFILENAME 160
#define ID_INPUTPASSWORD 161
#define ID_OUTPUTFILENAME 162
#define ID_ENCRYPT 176
#define ID_DECRYPT 177
#define ID_ABOUT 178
#define ID_HELP 179
#define ID_LEGAL 180
#define ID_INFO 181
#define ID_SYNTAX 182
#define ID_AUTHOR 183
#define ID_USENULL 192
#define IDT_STATUS 208

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#include <windows.h>
#include "res.h"
IDI_MAINICON ICON "main.ico"
IDI_ICON0 ICON "icon0.ico"
IDI_ICON1 ICON "icon1.ico"
IDI_ICON2 ICON "icon2.ico"
IDI_ICON3 ICON "icon3.ico"
IDI_ICON4 ICON "icon4.ico"
IDI_ICON5 ICON "icon5.ico"
IDD_MAINDIALOG DIALOGEX 0, 0, 206, 144
STYLE DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_VISIBLE | WS_CAPTION
EXSTYLE WS_EX_ACCEPTFILES | WS_EX_STATICEDGE
CAPTION "Obfuscator 2.1"
FONT 8, "Helv"
BEGIN
ICON IDI_ICON0, IDI_ICON0, 6, 8, 32, 32
ICON IDI_ICON1, IDI_ICON1, 6, 27, 32, 32
ICON IDI_ICON2, IDI_ICON2, 6, 46, 32, 32
ICON IDI_ICON3, IDI_ICON3, 6, 65, 32, 32
ICON IDI_ICON4, IDI_ICON4, 6, 84, 32, 32
ICON IDI_ICON5, IDI_ICON5, 6, 103, 32, 32
LTEXT "path of the file to use for input:", NOID, 32, 8, 134, 12
EDITTEXT ID_INPUTFILENAME, 32, 20, 134, 12, ES_AUTOHSCROLL, WS_EX_ACCEPTFILES | WS_EX_STATICEDGE
LTEXT "enter the password to use:", NOID, 32, 36, 134, 12
EDITTEXT ID_INPUTPASSWORD, 32, 48, 134, 12, ES_PASSWORD | ES_AUTOHSCROLL, WS_EX_STATICEDGE
AUTOCHECKBOX "append terminating null (v1.0 file)", ID_USENULL, 32, 62, 134, 12
LTEXT "path of file to use for output:", NOID, 32, 76, 134, 12
EDITTEXT ID_OUTPUTFILENAME, 32, 88, 134, 12, ES_AUTOHSCROLL, WS_EX_STATICEDGE
PUSHBUTTON "Encrypt", ID_ENCRYPT, 32, 108, 65, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Decrypt", ID_DECRYPT, 101, 108, 65, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Info", ID_ABOUT, 170, 6, 32, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Quit", IDCANCEL, 170, 20, 32, 100, BS_FLAT, WS_EX_STATICEDGE
CTEXT "need input", IDT_STATUS, 6, 126, 196, 12, SS_SUNKEN, WS_EX_STATICEDGE
END
IDD_ABOUTDIALOG DIALOGEX 0, 0, 128, 128
STYLE DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION
EXSTYLE WS_EX_STATICEDGE
CAPTION "About the File Obfuscator"
FONT 8, "Helv"
BEGIN
ICON IDI_MAINICON, IDI_MAINICON, 6, 8, 32, 32
LTEXT "What information do you seek?", NOID, 32, 8, 90, 27
PUSHBUTTON "Help", ID_HELP, 6, 32, 116, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "License", ID_LEGAL, 6, 46, 116, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Encryption", ID_INFO, 6, 60, 116, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Command-Line Usage", ID_SYNTAX, 6, 74, 116, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Author Info", ID_AUTHOR, 6, 88, 116, 12, BS_FLAT, WS_EX_STATICEDGE
PUSHBUTTON "Done", IDOK, 6, 110, 116, 12, BS_FLAT, WS_EX_STATICEDGE
END

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@ -1 +0,0 @@
Updated to ansi c for your compiling pleasure.

26
Obfuscator-3_0/Makefile Normal file
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PROJ := Obfuscator
PROJw := $(PROJ).exe
FILES := Obfuscate
BDIR := bin
OBJS := $(patsubst %,$(BDIR)/%.o,$(FILES))
SRCS := $(patsubst %,%.c,$(FILES))
H := $(patsubst %,%.h,$(FILES))
CC := gcc
OF := -Wall -O3 -fasm -fomit-frame-pointer -ffast-math -funroll-loops -fasm -fomit-frame-pointer -ffast-math -funroll-loops -pedantic -ansi
CF := -ansi
CCw := /usr/local/i386-mingw32-4.3.0/bin/i386-mingw32-gcc
OFw := -Wall -O3 -fasm -fomit-frame-pointer -ffast-math -funroll-loops -fasm -fomit-frame-pointer -ffast-math -funroll-loops -pedantic -mwindows
default: $(BDIR)/$(PROJ)
$(BDIR)/$(PROJ): $(OBJS)
$(CC) $(OF) $(CF) $^ -o $@
$(BDIR)/%.o: %.c
$(CC) $(OF) -c $< -o $@
.PHONY: clean
clean:
-rm $(OBJS)

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Obfuscator-3_0/Obfuscate.c Normal file
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/* Copyright 2001, 2013 Neil Edelman, distributed under the terms of the
GNU General Public License, see copying.txt */
/* Friday, January 5, 2001 16:54 */
/* Friday, January 4, 2013 15:39 */
#include <stdlib.h> /* malloc free */
#include <stdio.h> /* fprintf, fread, fwrite */
#include <string.h> /* strlen */
/* constants */
static const char *programme = "Obfuscator";
static const char *year = "2001, 2013";
static const int versionMajor = 3;
static const int versionMinor = 0;
/* private */
static void encrypt(char *key);
static void decrypt(char *key);
static void usage(const char *argvz);
/** private (entry point) */
int main(int argc, char **argv) {
if(argc <= 2) {
usage(argv[0]);
return EXIT_SUCCESS;
}
if(strcmp(argv[1], "+") == 0) {
encrypt(argv[2]);
} else if(strcmp(argv[1], "-") == 0) {
decrypt(argv[2]);
} else {
usage(argv[0]);
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
/** this is shifting the values one way, called "encrypt" */
static void encrypt(char *key) {
unsigned char buffer[1024], *bufPos;
const size_t buffer_size = sizeof buffer / sizeof(char);
unsigned char value[256], address[256];
unsigned char data, garb, addr, permute, parity = 0, byte;
int i, n;
int shift = 0, keyPos = 0;
const int keyLen = strlen(key);
size_t read;
/* determine how far the initial values in the table should be shifted */
for(i = 0; i < keyLen; i++) shift ^= key[i] << (i & 7);
/* if the password is "xxxxx" decypting with "xxx" might otherwise yield a
less-strongly encrypted file */
shift -= keyLen;
/* make a table of isomophic translation values */
for(i = 0; i < 256; i++) {
value[i] = i + shift;
address[i] = i - shift;
}
/* go through and mess with the file */
fprintf(stderr, "Progress: ");
while((read = fread(buffer, sizeof(char), buffer_size, stdin))) {
for(i = 0, bufPos = buffer; i < read; i++, bufPos++) {
data = *bufPos;
/* get the address in the valuetable of the data to write */
addr = address[(int)data];
/* address of the current character in the password */
byte = key[keyPos];
/* create an encryption seed based on the possword and file
position; passwords normally only contain alphanumeric values */
for(n = 0, permute = 0; n < keyLen; n++) permute ^= byte << (n & 7);
/* so that the key changes for the same glyph in the password across the file */
permute += ((char)i ^ (char)(i >> (key[keyLen - 1 - keyPos] & 7)));
/* encrypt the data to find where to look in the table */
garb = addr ^ permute;
/* use two parts of the password, and modify the operation based on previous data */
if(parity) garb += key[keyLen - 1 - keyPos];
else garb -= key[keyLen - 1 - keyPos];
/* write to the buffer */
*bufPos = garb;
/* set the parity for next time */
parity = data & 1;
/* now swap this result with the value of the original data in the translation table */
value[(int)data] ^= value[(int)garb];
value[(int)garb] ^= value[(int)data];
value[(int)data] ^= value[(int)garb];
/* and swap the addresses which point to these values */
address[(int)value[(int)data]] ^= address[(int)value[(int)garb]];
address[(int)value[(int)garb]] ^= address[(int)value[(int)data]];
address[(int)value[(int)data]] ^= address[(int)value[(int)garb]];
/* dynamically modify the password sequence */
key[keyPos] += value[(int)addr];
/* move to the next character in the sequence */
keyPos = (keyPos + 1) % keyLen;
}
if(fwrite(buffer, sizeof(char), read, stdout) != read) perror("writing");
fprintf(stderr, "|");
}
if(!feof(stdin)) perror("end of writing");
fprintf(stderr, " done.\n");
}
/** again, "decrypt" is a misnomer, it's just moving them the opposite way */
static void decrypt(char *key) {
unsigned char buffer[1024], *bufPos;
const size_t buffer_size = sizeof buffer / sizeof(char);
unsigned char value[256];
unsigned char data, garb, addr, permute, parity = 0, byte;
int i, n;
int shift = 0, keyPos = 0;
const int keyLen = strlen(key);
size_t read;
fprintf(stderr, "Progress: ");
for(i = 0; i < keyLen; i++) shift ^= key[i] << (i & 7);
shift -= keyLen;
for(i = 0; i < 256; i++) value[i] = i + shift;
while((read = fread(buffer, sizeof(char), buffer_size, stdin))) {
for(i = 0, bufPos = buffer; i < read; i++, bufPos++) {
garb = *bufPos;
byte = key[keyPos];
for(n = 0, permute = 0; n < keyLen; n++) permute ^= byte << (n & 7);
permute += ((char)i ^ (char)(i >> (key[keyLen - 1 - keyPos] & 7)));
/* reverse this part of the obfuscaption */
if(parity) addr = garb - key[keyLen - 1 - keyPos];
else addr = garb + key[keyLen - 1 - keyPos];
/* decrypt the garbage in addr to find where to look in the table */
addr ^= permute;
/* get the output data from this point in the table */
data = value[addr];
*bufPos = data;
parity = data & 1;
/* swap this result with the value of the original translation */
value[(int)data] ^= value[(int)garb];
value[(int)garb] ^= value[(int)data];
value[(int)data] ^= value[(int)garb];
/* dynamically modify the password sequence */
key[keyPos] += value[addr];
/* move to the next character in the sequence */
keyPos = (keyPos + 1) % keyLen;
}
if(fwrite(buffer, sizeof(char), read, stdout) != read) perror("writing");
fprintf(stderr, "|");
}
if(!feof(stdin)) perror("end of writing");
fprintf(stderr, " done.\n");
}
static void usage(const char *argvz) {
fprintf(stderr, "%s Copyright %s Neil Edelman\n", programme, year);
fprintf(stderr, "Version %d.%d.\n\n", versionMajor, versionMinor);
fprintf(stderr, "This program comes with ABSOLUTELY NO WARRANTY.\n");
fprintf(stderr, "This is free software, and you are welcome to redistribute it\n");
fprintf(stderr, "under certain conditions; see copying.txt.\n\n");
fprintf(stderr, "Usage: %s mode key\n\n", argvz);
fprintf(stderr, "mode either + or -; eg, a file encrypted with - and then re-encrypted\n");
fprintf(stderr, " with - will be decrypted by running + and +.\n\n");
fprintf(stderr, "key the secret stream cipher private-key\n\n");
fprintf(stderr, "Example:\n");
fprintf(stderr, "%s + \"12345\" < secret > secret_encrypted\n", programme);
fprintf(stderr, "%s - \"12345\" < secret_encrypted > secret_decrypted\n\n", programme);
}

15
Obfuscator-3_0/copying.txt Normal file
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Copyright (C) 2001 Neil Edelman
Obfuscator is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 Obfuscator (see gnu.txt.) If not, see
<http://www.gnu.org/licenses/>.

619
Obfuscator-3_0/gpl.txt Normal file
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@ -0,0 +1,619 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
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copy of the Program in return for a fee.

25
Obfuscator-3_0/readme.txt Normal file
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Copyright (C) 2001, 2013 Neil Edelman, see copying.txt.
neil dot edelman each mail dot mcgill dot ca
Version 3.0.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; see copying.txt.
Usage: Obfuscator mode key
mode either + or -; eg, a file encrypted with - and then re-encrypted
with - will be decrypted by running + and +.
key the secret stream cipher private-key
Example:
Obfuscator + "12345" < secret > secret_encrypted
Obfuscator - "12345" < secret_encrypted > secret_decrypted
The encryption process uses an algorithm that the author made
himself. It turns out that it's a stream cipher. The length of the
key is linearly related to how many bits of encryption. The bits of
the key generate a pseudorandom keysteam. The author is not an
expert, and it is possible that this is insecure.

2
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@ -1,2 +0,0 @@
Secret stream cipher private-key encryption that uses a pseudorandom
keystream based on a user-specified key.

61
index.html
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@ -1,61 +0,0 @@
<!doctype html public "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>http://neil.chaosnet.org/code/Obfuscator/</title>
<meta name = "Content-type" http-equiv = "Content-Type" content = "text/html; charset=us-ascii">
<meta name = "Keywords" content = "code, Obfuscator, neil">
<meta name = "Description" content = "Do'n't go here. Ultra-secret archive."> <!-- bad form, print index.d -->
<meta name = "Author" content = "Neil">
<meta name = "Generator" content = "This pristine code lies unmarred by infantile editors!">
<link rel = "top" href = "http://neil.chaosnet.org/">
<link rel = "icon" href = "/favicon.ico" type = "image/x-icon">
<link rel = "shortcut icon" href = "/favicon.ico" type = "image/x-icon">
<link rel = "stylesheet" type = "text/css" href = "/neil.css">
<link rel = "alternate" type = "application/rss+xml" title = "News from Afar" href = "/newsfeed.rss">
</head>
<body>
<p class = "noprint"><img src = "/neil.jpeg" width = 528 height = 56 alt = "[ M&aelig;lstr&ouml;m ]"></p>
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Secret stream cipher private-key encryption that uses a pseudorandom
keystream based on a user-specified key.
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<a href = ".."><img src = "../../dir.jpeg" alt = "[ Dir ]"></a>
<div class = "icontext"><div><a href = "..">..</a></div></div>
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Programming.
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<a href = "Obfuscator-2_1.exe"><img src = "Obfuscator-2_1.exe.d.jpeg" alt = "[ File ]"></a>
<div class = "icontext"><div><a href = "Obfuscator-2_1.exe">Obfuscator-2_1.exe</a> (23 KB)</div></div>
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By request, updated executable version 2.1 for Windows.
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<a href = "Obfuscator-2_1.zip"><img src = "../../file.jpeg" alt = "[ File ]"></a>
<div class = "icontext"><div><a href = "Obfuscator-2_1.zip">Obfuscator-2_1.zip</a> (27 KB)</div></div>
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Source code for 2.1 for Windows.
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<a href = "Obfuscator-3_0.zip"><img src = "../../file.jpeg" alt = "[ File ]"></a>
<div class = "icontext"><div><a href = "Obfuscator-3_0.zip">Obfuscator-3_0.zip</a> (15 KB)</div></div>
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Updated to ansi c for your compiling pleasure.
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<p class = "noscreen">From <a href = "http://neil.chaosnet.org/code/Obfuscator/">http://neil.chaosnet.org/code/Obfuscator/</a>.</p>
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Secret stream cipher private-key encryption that uses a
pseudorandom keystream based on a user-specified key.
I had a Qbasic programme that I ported to Windows to
learn the API in 2000-10. I learnt to compartmentalize, and
re-wrote it without the Windows dependancy.
"It is possible that this is insecure." --2000 me.