By Steggy
BCS Technology Limited
Email: steggy@bcstechnology.net
Web Site: https://www.bcstechnology.net
The need for makekey has to do with interfacing to a Throughbred Dictionary-IV app originally written to run on SCO OSR5. I now have complete portability for any other use of the app.
Apparently there was once a Linux makekey, but it was "deprecated" in favor of "crypt(3)".
Apparently there was also (and may still be somewhere) a command line "crypt" that I could have "front-ended" for my needs, but it doesn't exist on my system. As there really isn't much to this, I just went ahead and wrote what I needed.
Compile source with gcc -lcrypt -m32 -o makekey makekey.c. The -m32 option is required on a 64 bit system. Operation is the same as makekey found on SCO, BSD, AIX, etc.
makekey: Generate Encrypted Password
Copyright (C)1994-2009 by BCS Technology Limited. All rights reserved.
Permission is granted to use, copy, modify and/or distribute this soft- ware, provided proper attribution and credit is given and all copyright notices remain intact. This software is *NOT* in the public domain and has *NOT* been GPLed.
DISCLAIMER: BCS Technology Limited does not warrant that this software
is suitable for any particular purpose, or that it will
even work as intended. No technical support of any kind
will be offered. We take no responsibility for anything
unpleasant that might happen to your system, your business
or your financial well-being due to the use of this soft-
ware. In other words, USE AT YOUR OWN RISK.
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * makekey: Generate Encrypted Password * * * * * * * * Copyright (C)1994-2009 by BCS Technology Limited. All rights reserved. * * * * * * * * Permission is granted to use, copy, modify and/or distribute this soft- * * * * ware, provided proper attribution and credit is given and all copyright * * * * notices remain intact. This software is *NOT* in the public domain and * * * * has *NOT* been GPLed. * * * * * * * * DISCLAIMER: BCS Technology Limited does not warrant that this software * * * * is suitable for any particular purpose, or that it will * * * * even work as intended. No technical support of any kind * * * * will be offered. We take no responsibility for anything * * * * unpleasant that might happen to your system, your business * * * * or your financial well-being due to the use of this soft- * * * * ware. In other words, USE AT YOUR OWN RISK. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * makekey reads from STDIN & writes to STDOUT. Input should consist of an 8 * * character password string followed by a 2 character salt. The salt charac- * * ters should be taken from the letters a-z & A-Z, numerals, . & /. The salt * * is returned at the beginning of the encrypted output string. Results are * * undefined if the input string is not 10 characters in total length. Excess * * input will be silently discarded. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> // To compile on most Linux distros: // gcc -o makekey -m32 -lcrypt makekey.c /*===========================================================================*/ /* global declarations */ #define INPBUFSIZ 10 // input buffer size #define KEYSIZ 8 // input key size #define SALTSIZ 2 // input salt size char NUL='\0'; // null string terminator void collect(char *); // collect input /*===========================================================================*/ /* makekey: generate encrypted password */ int main(void) { char *ec; // encrypted string pointer char inpbuf[INPBUFSIZ+1]; // input buffer char key[KEYSIZ+1]; // key char salt[SALTSIZ+1]; // salt int eclen; // encrypted string length collect(inpbuf); // collect input strncpy(key,inpbuf,KEYSIZ); // extract key strncpy(salt,inpbuf+KEYSIZ,SALTSIZ); // extract salt key[KEYSIZ]=NUL; // terminate key salt[SALTSIZ]=NUL; // terminate salt eclen=(strlen(ec=crypt(key,salt))); // encrypt if (write(STDOUT_FILENO,ec,eclen)!=eclen) perror("stdout"); // output <> input exit(0); // done } /*===========================================================================*/ /* collect input string, at most INPBUFSIZ chars */ void collect(char *buf) { int c,ct=0; while ((c=getchar()) != EOF) { if (ct<INPBUFSIZ) { *(buf++)=c; ct++; } } *(buf)=NUL; // terminate input string } /*===========================================================================*/ /* copyright declaration for `what' command */ const char *what[]={ "@(#)makekey: BCS Technology Limited Password Encrypter", "@(#)", "@(#)Copyright (C)1994-2009 by BCS Technology Limited. All rights", "@(#)reserved. Permission granted to use, copy, modify and/or", "@(#)distribute this software, providing proper attribution is", "@(#)given and copyright notices remain intact. This software is", "@(#)*NOT* in the public domain and has *NOT* been GPLed.", "@(#)", "@(#)BCS Technology Limited DOES NOT accept any responsibility for", "@(#)anything bad that might occur as a consequence of using or", "@(#)modifying this software. USE AT YOUR OWN RISK." }; /*===========================================================================*/
Got something to add? Send me email.
More Articles by Steggy © 2009-11-07 Steggy
Principles have no real force except when one is well-fed. (Mark Twain)
Printer Friendly Version
'makekey' for Linux Copyright © December 2008 Steggy
Have you tried Searching this site?
This is a Unix/Linux resource website. It contains technical articles about Unix, Linux and general computing related subjects, opinion, news, help files, how-to's, tutorials and more.
Contact us
Printer Friendly Version